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Bourke G, Wade RG, van Alfen N. Updates in diagnostic tools for diagnosing nerve injury and compressions. J Hand Surg Eur Vol 2024; 49:668-680. [PMID: 38534079 DOI: 10.1177/17531934241238736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/28/2024]
Abstract
Predicting prognosis after nerve injury and compression can be challenging, even for the experienced clinician. Although thorough clinical assessment can aid diagnosis, we cannot always be precise about long-term functional recovery of either motor or sensory nerves. To evaluate the severity of nerve injury, surgical exploration remains the gold standard, particularly after iatrogenic injury and major nerve injury from trauma, such as brachial plexus injury. Recently, advances in imaging techniques (ultrasound, magnetic resonance imaging [MRI] and MR neurography) along with multimodality assessment, including electrodiagnostic testing, have allowed us to have a better preoperative understanding of nerve continuity and prediction of nerve health and possible recovery. This article outlines the current and potential roles for clinical assessment, exploratory surgery, electrodiagnostic testing ultrasound and MRI in entrapment neuropathies, inflammatory neuritis and trauma. Emphasis is placed on those modalities that are improving in diagnostic accuracy of nerve assessment before any surgical intervention.
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Affiliation(s)
- Gráinne Bourke
- Leeds Institute for Medical Research, University of Leeds, Leeds, UK
- Department of Plastic and Reconstructive Surgery, Leeds Teaching Hospitals Trust, Leeds, UK
| | - Ryckie G Wade
- Leeds Institute for Medical Research, University of Leeds, Leeds, UK
- Department of Plastic and Reconstructive Surgery, Leeds Teaching Hospitals Trust, Leeds, UK
| | - Nens van Alfen
- Department of Neurology, Clinical Neuromuscular Imaging Group, Donders Centre for Neuroscience, Radboud University Medical Centre, Nijmegen, The Netherlands
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Hannaford A, Paling E, Silsby M, Vincenten S, van Alfen N, Simon NG. Electrodiagnostic studies and new diagnostic modalities for evaluation of peripheral nerve disorders. Muscle Nerve 2024; 69:653-669. [PMID: 38433118 DOI: 10.1002/mus.28068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2023] [Revised: 01/31/2024] [Accepted: 02/02/2024] [Indexed: 03/05/2024]
Abstract
Electrodiagnostic studies (EDx) are frequently performed in the diagnostic evaluation of peripheral nerve disorders. There is increasing interest in the use of newer, alternative diagnostic modalities, in particular imaging, either to complement or replace established EDx protocols. However, the evidence to support this approach has not been expansively reviewed. In this paper, diagnostic performance data from studies of EDx and other diagnostic modalities in common peripheral nerve disorders have been analyzed and described, with a focus on radiculopathy, plexopathy, compressive neuropathies, and the important neuropathy subtypes of Guillain-Barré syndrome, chronic inflammatory demyelinating polyradiculoneuropathy (CIDP), vasculitic neuropathy and diabetic neuropathy. Overall EDx retains its place as a primary diagnostic modality in the evaluated peripheral nerve disorders. Magnetic resonance imaging and ultrasound have developed important complementary diagnostic roles in compressive and traumatic neuropathies and atypical CIDP, but their value is more limited in other neuropathy subtypes. Identification of hourglass constriction in nerves of patients with neuralgic amyotrophy may have therapeutic implications. Investigation of radiculopathy is confounded by poor correlation between clinical features and imaging findings and the lack of a diagnostic gold standard. There is a need to enhance the literature on the utility of these newer diagnostic modalities.
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Affiliation(s)
- Andrew Hannaford
- Department of Neurology, Concord Hospital, Sydney, New South Wales, Australia
- Brain and Nerve Research Centre, University of Sydney, Sydney, New South Wales, Australia
- Department of Neurology, Westmead Hospital, Sydney, New South Wales, Australia
| | - Elijah Paling
- School of Medicine, University of Notre Dame, Sydney, New South Wales, Australia
| | - Matthew Silsby
- Department of Neurology, Concord Hospital, Sydney, New South Wales, Australia
- Brain and Nerve Research Centre, University of Sydney, Sydney, New South Wales, Australia
- Department of Neurology, Westmead Hospital, Sydney, New South Wales, Australia
| | - Sanne Vincenten
- Department of Neurology and Clinical Neurophysiology, Radboud University Medical Center, Donders Center for Neuroscience, Nijmegen, the Netherlands
| | - Nens van Alfen
- Department of Neurology and Clinical Neurophysiology, Radboud University Medical Center, Donders Center for Neuroscience, Nijmegen, the Netherlands
| | - Neil G Simon
- Northern Beaches Clinical School, Faculty of Medicine and Health Sciences, Macquarie University, Sydney, New South Wales, Australia
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Dahlin LB, Zimmerman M, Calcagni M, Hundepool CA, van Alfen N, Chung KC. Carpal tunnel syndrome. Nat Rev Dis Primers 2024; 10:37. [PMID: 38782929 DOI: 10.1038/s41572-024-00521-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 04/17/2024] [Indexed: 05/25/2024]
Abstract
Carpal tunnel syndrome (CTS) is the most common nerve entrapment disorder worldwide. The epidemiology and risk factors, including family burden, for developing CTS are multi-factorial. Despite much research, its intricate pathophysiological mechanism(s) are not fully understood. An underlying subclinical neuropathy may indicate an increased susceptibility to developing CTS. Although surgery is often performed for CTS, clear international guidelines to indicate when to perform non-surgical or surgical treatment, based on stage and severity of CTS, remain to be elucidated. Neurophysiological examination, using electrophysiology or ultrasonography, performed in certain circumstances, should correlate with the history and findings in clinical examination of the person with CTS. History and clinical examination are particularly relevant globally owing to lack of other equipment. Various instruments are used to assess CTS and treatment outcomes as well as the effect of the disorder on quality of life. The surgical treatment options of CTS - open or endoscopic - offer an effective solution to mitigate functional impairments and pain. However, there are risks of post-operative persistent or recurrent symptoms, requiring meticulous diagnostic re-evaluation before any additional surgery. Health-care professionals should have increased awareness about CTS and all its implications. Future considerations of CTS include use of linked national registries to understand risk factors, explore possible screening methods, and evaluate diagnosis and treatment with a broader perspective beyond surgery, including psychological well-being.
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Affiliation(s)
- Lars B Dahlin
- Department of Translational Medicine - Hand Surgery, Lund University, Malmö, Sweden.
- Department of Hand Surgery, Skåne University Hospital, Malmö, Sweden.
- Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
| | - Malin Zimmerman
- Department of Translational Medicine - Hand Surgery, Lund University, Malmö, Sweden
- Department of Hand Surgery, Skåne University Hospital, Malmö, Sweden
- Department of Orthopedics, Helsingborg Hospital, Helsingborg, Sweden
| | - Maurizio Calcagni
- Department of Plastic Surgery and Hand Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Caroline A Hundepool
- Department of Plastic, Reconstructive and Hand Surgery, Erasmus MC, Rotterdam, The Netherlands
| | - Nens van Alfen
- Department of Neurology and Clinical Neurophysiology, Clinical Neuromuscular Imaging Group, Donders Center for Neuroscience, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Kevin C Chung
- Professor of Surgery, Section of Plastic Surgery, Department of Surgery, University of Michigan Medical School, Ann Arbor, MI, USA
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Meiling JB, Gandhi Mehta RK, Baute Penry V, Cartwright MS, McGhee MB. Ultra high-frequency ultrasound of fascicles in the ulnar and radial nerves. Muscle Nerve 2024. [PMID: 38708872 DOI: 10.1002/mus.28097] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2023] [Revised: 03/21/2024] [Accepted: 04/14/2024] [Indexed: 05/07/2024]
Abstract
INTRODUCTION/AIMS Ultra high-frequency ultrasound (UHFUS) has been demonstrated to allow easy visualization and quantification of median and digital nerve fascicles; however, there is a lack of normative data for other upper limb nerves. The purpose of this study was to use UHFUS to establish normative reference values and ranges for fascicle count and density within selected upper extremity nerves. METHODS Twenty-one healthy volunteers underwent sonographic examination of the ulnar, superficial branch of the radial, and radial nerves on one upper limb using UHFUS with a 48 MHz linear transducer. The number of fascicles in each peripheral nerve and fascicle density were assessed. RESULTS The mean fascicle number and fascicle density for each of the measured nerves was ulnar nerve at the wrist 11.7 and 2.0, ulnar nerve at the elbow 9.2 and 1.1, superficial branch of the radial nerve 7.3 and 2.5, and radial nerve at the spiral groove 4.2 and 0.8. A single significant association was observed between CSA and fascicle number in the ulnar nerve at the wrist (p = .023, r = 0.66). Neither fascicle number nor density could be predicted by age, sex, height, weight, or body mass index. DISCUSSION UHFUS may help to establish a baseline of normative data on upper limb nerves that are not frequently biopsied due to their mixed motor and sensory functions and has the potential for increased understanding of nerve fascicular anatomy to improve diagnostic accuracy of focal nerve lesions, particularly those with selective fascicular involvement.
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Affiliation(s)
- James B Meiling
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Rachana K Gandhi Mehta
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Vanessa Baute Penry
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Michael S Cartwright
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Marisa Barclay McGhee
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
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Meiling JB, Andrapalliyal N, McGhee MB, Penry VB, Cartwright MS, Gandhi Mehta RK. Ultrahigh-frequency ultrasound of fascicles in the common fibular, superficial fibular, and sural nerves. Muscle Nerve 2024; 69:631-636. [PMID: 38456323 DOI: 10.1002/mus.28078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Revised: 02/19/2024] [Accepted: 02/27/2024] [Indexed: 03/09/2024]
Abstract
INTRODUCTION/AIMS While ultrasound assessment of cross-sectional area and echogenicity has gained popularity as a biomarker for various neuropathies, there is a scarcity of data regarding fascicle count and density in neuropathies or even healthy controls. The aim of this study was to determine whether fascicles within select lower limb nerves (common fibular, superficial fibular, and sural nerves) can be counted in healthy individuals using ultrahigh-frequency ultrasound (UHFUS). METHODS Twenty healthy volunteers underwent sonographic examination of the common fibular, superficial fibular, and sural nerves on each lower limb using UHFUS with a 48 MHz linear transducer. Fascicle counts and density in each examined nerve were determined by a single rater. RESULTS The mean fascicle number for each of the measured nerves included the following: common fibular nerve 9.85 (SD 2.29), superficial fibular nerve 5.35 (SD 1.59), and sural nerve 6.73 (SD 1.91). Multivariate linear regression analysis revealed a significant association between cross-sectional area and fascicle count for all three nerves. In addition, there was a significant association seen in the common fibular nerve between fascicle density and height, weight, and body mass index. Age and sex did not predict fascicle count or density (all p > .13). DISCUSSION UHFUS enabled the identification and counting of fascicles and fascicle density in the common fibular, superficial fibular, and sural nerves. Knowledge about normal values and normal peripheral nerve architecture is needed in order to further understand and identify pathological changes that may occur within each nerve in different disease states.
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Affiliation(s)
- James B Meiling
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | | | - Marisa Barclay McGhee
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Vanessa Baute Penry
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Michael S Cartwright
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
| | - Rachana K Gandhi Mehta
- Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina, USA
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Latario LD, Fowler JR. Characteristics of Patients with Clinical Signs and Symptoms of Carpal Tunnel Syndrome but Negative Diagnostic Testing. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2024; 12:e5816. [PMID: 38752222 PMCID: PMC11095960 DOI: 10.1097/gox.0000000000005816] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Accepted: 03/22/2024] [Indexed: 05/18/2024]
Abstract
Background Carpal tunnel syndrome (CTS) is a clinical diagnosis involving numerous confirmatory diagnostic tools, including patient questionnaires, ultrasound (US), and electrodiagnostic studies (EDX.) Patients may experience clinical symptoms of CTS with false negative diagnostic testing. The purpose of this study was to identify characteristics of patients with clinical symptoms of CTS with negative diagnostic testing. Methods An existing database of 295 hands containing the six-item CTS-6, US of the median nerve, and EDX was queried. Patients with symptoms of carpal tunnel scoring 12.5 or higher on CTS-6 were sorted into those with all positive testing or negative testing. Results In 60 patients, 103 hands had both positive US and EDX and a CTS-6 of 12.5 or higher. Twenty-nine hands in 25 patients had a CTS-6 of 12.5 or higher and both negative ultrasound and EDX. There was a significantly younger average age of 43 (P = 0.007) and lower average BMI of 28 (P < 0.0001) of patients in the negative diagnostic study group, compared with the average age of 53, and a body mass index (BMI) of 34 in the positive diagnostic study. Conclusions In this series, patients with symptoms of carpal tunnel syndrome and negative diagnostic studies were on average younger and had a lower BMI. These patients may warrant more careful consideration of CTS clinical diagnosis and counseling regarding a higher risk of false-negative confirmatory testing. Further studies are needed to determine possible effects of age and BMI on electrodiagnostic studies and ultrasound testing in CTS.
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Affiliation(s)
- Luke D. Latario
- From the Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Penn
| | - John R. Fowler
- From the Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, Penn
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Tezcan EA, Levendoglu F, Durmaz MS, Batur EB, Gezer IA, Erol K. Utility of shear wave elastography for diagnosing carpal tunnel syndrome with psoriatic arthritis. Ir J Med Sci 2024; 193:977-985. [PMID: 37670102 DOI: 10.1007/s11845-023-03512-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2023] [Accepted: 08/28/2023] [Indexed: 09/07/2023]
Abstract
BACKGROUND Carpal tunnel syndrome (CTS) is a type of peripheral entrapment neuropathy and common for the patients with psoriatic arthritis (PsA). Shear wave elastography (SWE) is a new ultrasonography technique that can be used for diagnosing CTS, but not studied in PsA patients. AIMS The aim of this study to measure the stiffness of median nerve and hand muscles by quantitative SWE to identify whether SWE can be used for diagnosing CTS in patients with PsA or not. METHODS To diagnose CTS, all patients had electrodiagnostic study. The stiffness values of the median nerve, abductor pollicis brevis, and abductor digiti minimi were determined using SWE. Muscle stiffness ratio was also calculated. RESULTS Consideration is given to 48 patients with PsA (93 wrists) and 29 healthy volunteers (57 wrists). Median nerve stiffness was found to be significantly higher, and abductor pollicis brevis' stiffness and muscle stiffness ratio were significantly lower in PsA patients' wrists compared to control group (p = 0.002, p < 0.001, p = 0.001, respectively) and in CTS wrists compared to others (p < 0.001, p < 0.001, p = 0.001, respectively). Receiver operating characteristic analysis identified 28.2 kPA as the median nerve stiffness cut-off point for differentiating CTS in PsA patients (p = 0.001). CONCLUSIONS We found that SWE has a good diagnostic value for CTS with PsA patients; hence, we can conclude that SWE could diagnose CTS in PsA patients.
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Affiliation(s)
- Ezgi Akyildiz Tezcan
- Department of Physical Medicine and Rehabilitation, Cumra State Hospital, Konya, 42500, Turkey.
| | - Funda Levendoglu
- Department of Physical Medicine and Rehabilitation, Selcuk University Medical Faculty, Konya, Turkey
| | | | - Elif Balevi Batur
- Department of Physical Medicine and Rehabilitation, Selcuk University Medical Faculty, Konya, Turkey
| | - Ilknur Albayrak Gezer
- Department of Physical Medicine and Rehabilitation, Selcuk University Medical Faculty, Konya, Turkey
| | - Kemal Erol
- Division of Rheumatology, Department of Physical Medicine and Rehabilitation, Selcuk University Medical Faculty, Konya, Turkey
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Sheen S, Ahmed A, Raiford ME, Jones CMC, Morrison E, Hauber K, Orsini J, Hammert WC, Speach D. Association between electrodiagnosis and neuromuscular ultrasound in the diagnosis and assessment of severity of carpal tunnel syndrome. PM R 2024. [PMID: 38529791 DOI: 10.1002/pmrj.13168] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 02/01/2024] [Accepted: 02/20/2024] [Indexed: 03/27/2024]
Abstract
BACKGROUND Neuromuscular ultrasound plays an increasing role in diagnosing carpal tunnel syndrome (CTS). There are limited data supporting the correlation between the electrodiagnostic studies and ultrasound measurements in CTS. OBJECTIVE To assess the association between different electrodiagnostic severities and ultrasound measurements of the median nerve in CTS. DESIGN A retrospective cohort study. SETTING An academic tertiary care center. PATIENTS Patients 18 years or older evaluated with upper limb electrodiagnostic studies and neuromuscular ultrasound. MAIN OUTCOME MEASUREMENT Ultrasound measurements of the median nerve cross-sectional area (CSA) at the wrist and the calculated wrist-to-forearm ratio (WFR) were compared with the electrodiagnostic severity (normal, mild, moderate, and severe). Mean analysis and analysis of variance test (α = 0.05) were performed to assess the association. RESULTS A total of 1359 limbs were identified. There was a statistically significant association between electrodiagnostic severity of CTS and median nerve CSA at the wrist (p < .001), as well as the WFR (p < .001). The mean median nerve CSA at the wrist and WFR were 7.01 ± 2.06 mm2 (95% CI: 6.80-7.20) and 1.24 ± 0.36 (95% CI: 1.16-1.24) in electrodiagnostically normal median nerves, 10.47 ± 2.82 mm2 (95% CI: 10.25-10.75) and 2.06 ± 0.67 (95% CI: 2.04-2.16) in electrodiagnostically mild CTS, 12.95 ± 4.74 mm2 (95% CI: 12.41-13.59) and 2.49 ± 1.04 (95% CI: 2.37, 2.63) in electrodiagnostically moderate CTS, and 14.69 ± 5.38 mm2 (95% CI: 13.95-15.44) and 2.71 ± 1.02 (95% CI: 2.56-2.84) in electrodiagnostically severe CTS, respectively. CONCLUSION This study suggests a direct association between electrodiagnostic severity and ultrasound measurements of the median nerve in patients with suspected CTS.
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Affiliation(s)
- Soun Sheen
- Department of PM&R, University of Rochester, Rochester, New York, USA
- Department of Pain Medicine, MD Anderson Cancer Center, Houston, Texas, USA
| | - Aabra Ahmed
- Department of Plastic Surgery, University of Rochester, Rochester, New York, USA
| | - Mattie E Raiford
- Department of Orthopedics, University of Rochester, Rochester, New York, USA
| | - Courtney M C Jones
- Department of Orthopedics, University of Rochester, Rochester, New York, USA
| | - Eric Morrison
- Department of PM&R, University of Rochester, Rochester, New York, USA
| | - Kurt Hauber
- Department of PM&R, University of Rochester, Rochester, New York, USA
| | - John Orsini
- Department of PM&R, University of Rochester, Rochester, New York, USA
| | - Warren C Hammert
- Department of Orthopedic Surgery, Duke University, Durham, North Carolina, USA
| | - David Speach
- Department of PM&R, University of Rochester, Rochester, New York, USA
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Gasemaltayeb R, Wannarong T, Ticku H, Preston DC. Neuromuscular ultrasound: Impact on diagnosis and management. Muscle Nerve 2024; 69:295-302. [PMID: 37818726 DOI: 10.1002/mus.27983] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Revised: 09/21/2023] [Accepted: 09/23/2023] [Indexed: 10/13/2023]
Abstract
INTRODUCTION/AIM High-resolution ultrasound (HRUS) is increasingly used in evaluating neuromuscular conditions. Its potential advantages include its ability to discern anatomic information and make specific etiological diagnoses. Although many studies have demonstrated HRUS effectiveness, especially in mononeuropathies, more information is needed to better determine how often and to what extent useful information is obtained; how it influences diagnosis, clinical decision-making, and patient management; and how it is used with electrodiagnostic (EDx) studies. METHODS A retrospective cohort study was performed on patients referred for HRUS at a university laboratory during 2021. Demographic information, referral diagnoses, clinical information, HRUS findings, and follow-up patient management were analyzed. For patients who had EDx, results were compared with HRUS. Determinations were made whether HRUS did or did not aid in the diagnosis. For patients in whom HRUS resulted in a diagnosis, determination was made whether it confirmed the diagnosis made clinically or by EDx but did not change management; added additional important information; and/or made a decisive impact on subsequent management. RESULTS Five hundred two patients were analyzed, most referred for mononeuropathy, brachial plexopathy, and polyneuropathy. HRUS was abnormal in 81.7% of patients. HRUS added additional useful information in 79.0% and was decisive in management in 62.7%. In patients who also had abnormal EDx, HRUS resulted in decisive management in 49.5%. DISCUSSION HRUS is an effective diagnostic tool that frequently adds localizing and structural information that is otherwise not obtainable by clinical and EDx evaluation. In a substantial number of patients selected for HRUS, it is decisive in guiding further management.
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Affiliation(s)
- Raed Gasemaltayeb
- Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Thapat Wannarong
- Neuromuscular Division, Department of Neurology, Duke University Hospital, Durham, North Carolina, USA
| | - Hemani Ticku
- Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - David C Preston
- Neurological Institute, University Hospitals Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
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Slouma M, Ben Dhia S, Cheour E, Gharsallah I. Acroparesthesias: An Overview. Curr Rheumatol Rev 2024; 20:115-126. [PMID: 37921132 DOI: 10.2174/0115733971254976230927113202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2023] [Revised: 08/09/2023] [Accepted: 08/18/2023] [Indexed: 11/04/2023]
Abstract
Acroparesthesia is a symptom characterized by a subjective sensation, such as numbness, tingling, prickling, and reduced sensation, affecting the extremities (fingers and toes). Despite its frequency, data regarding its diagnostic approach and management are scarce. The etiological diagnosis of acroparesthesia is sometimes challenging since it can be due to abnormality anywhere along the sensory pathway from the peripheral nervous system to the cerebral cortex. Acroparesthesia can reveal several diseases. It can be associated with rheumatic complaints such as arthritis or myalgia. Further cautions are required when paresthesia is acute (within days) in onset, rapidly progressive, severe, asymmetric, proximal, multifocal, or associated with predominant motor signs (limb weakness) or severe dysautonomia. Acroparesthesia may reveal Guillain-Barré syndrome or vasculitis, requiring rapid management. Acroparesthesia is a predominant symptom of polyneuropathy, typically distal and symmetric, often due to diabetes. However, it can occur in other diseases such as vitamin B12 deficiency, monoclonal gammopathy of undetermined significance, or Fabry's disease. Mononeuropathy, mainly carpal tunnel syndrome, remains the most common cause of acroparesthesia. Ultrasonography contributes to the diagnosis of nerve entrapment neuropathy by showing nerve enlargement, hypoechogenic nerve, and intraneural vascularity. Besides, it can reveal its cause, such as space-occupying lesions, anatomical nerve variations, or anomalous muscle. Ultrasonography is also helpful for entrapment neuropathy treatment, such as ultrasound-guided steroid injection or carpal tunnel release. The management of acroparesthesia depends on its causes. This article aimed to review and summarize current knowledge on acroparesthesia and its causes. We also propose an algorithm for the management of acroparesthesia.
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Affiliation(s)
- Maroua Slouma
- Department of Rheumatology, Military Hospital, Tunis, Tunisia
- Department of Medicine, Tunis El Manar University, Tunis, Tunisia
| | - Siwar Ben Dhia
- Department of Rheumatology, Military Hospital, Tunis, Tunisia
- Department of Medicine, Tunis El Manar University, Tunis, Tunisia
| | - Elhem Cheour
- Department of Medicine, Tunis El Manar University, Tunis, Tunisia
- Pain Treatment Center, La Rabta Hospital, Tunis, Tunisia
| | - Imen Gharsallah
- Department of Rheumatology, Military Hospital, Tunis, Tunisia
- Department of Medicine, Tunis El Manar University, Tunis, Tunisia
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11
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Harinesan N, Silsby M, Simon NG. Carpal tunnel syndrome. HANDBOOK OF CLINICAL NEUROLOGY 2024; 201:61-88. [PMID: 38697747 DOI: 10.1016/b978-0-323-90108-6.00005-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2024]
Abstract
Median neuropathy at the wrist, commonly referred to as carpal tunnel syndrome (CTS), is the most common entrapment neuropathy. It is caused by chronic compression of the median nerve at the wrist within the space-limited carpal tunnel. Risk factors that contribute to the etiology of compression include female gender, obesity, work-related factors, and underlying medical conditions, such as hypothyroidism, pregnancy, and amyloidosis. The diagnosis is made on clinical grounds, although these can be confounded by anatomical variations. Electrodiagnostic studies, which are specific and sensitive in diagnosing CTS, support the diagnosis; however, a subgroup may present with normal results. The advent of imaging techniques, including ultrasound and MRI, further assists the diagnostic process. The management of CTS is divided into the nonsurgical approaches that include hand therapy, splinting and corticosteroid injection, and surgical decompression of the carpal tunnel. Although several surgical techniques have been developed, no one method is more effective than the other. Each of these management approaches are effective at providing symptom relief and are utilized at different severities of the condition. There is, however, a lack of consensus on standardized diagnostic criteria, as well as when and to whom to refer patients for surgery.
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Affiliation(s)
- Nimalan Harinesan
- Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
| | - Matthew Silsby
- Westmead Clinical School, University of Sydney, Sydney, NSW, Australia
| | - Neil G Simon
- Northern Beaches Clinical School, Macquarie University, Sydney, NSW, Australia.
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12
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Marriott C, Montgomery K, Whelan A. Carpal Tunnel Syndrome in Athletes Who Compete in Wheelchair Sport: A Scoping Review. Am J Phys Med Rehabil 2023; 102:1116-1121. [PMID: 36729651 DOI: 10.1097/phm.0000000000002167] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
ABSTRACT The purpose of this review was to understand the research on carpal tunnel syndrome in athletes who compete in wheelchair sport. Eight articles were identified using the search strategy. The most common sport evaluated was wheelchair basketball ( N = 4). Most athletes were male and were diagnosed with a spinal cord injury. Different clinical and electrodiagnostic criteria have been used to diagnose carpal tunnel syndrome. Two studies incorporated ultrasound into the clinical evaluation of median nerve pathology. The duration of disability and wheelchair use were associated with increased risk of carpal tunnel syndrome in four studies. There was no association between training load and the prevalence of carpal tunnel syndrome. No study has explored the functional implications of carpal tunnel syndrome on sports participation and performance. No study has assessed the prevention and treatment of carpal tunnel syndrome in individuals who compete in wheelchair sport. This review provides an understanding of the important diagnostic tools, and demographic and training risk factors to consider when evaluating para-athletes for carpal tunnel syndrome and highlights areas for future research.
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Affiliation(s)
- Catherine Marriott
- From the Division of Physical Medicine and Rehabilitation, Dalhousie University, Halifax, Canada
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Murciano Casas MDLP, Rodríguez-Piñero M, Jiménez Sarmiento AS, Álvarez López M, Jiménez Jurado G. Evaluation of ultrasound as diagnostic tool in patients with clinical features suggestive of carpal tunnel syndrome in comparison to nerve conduction studies: Study protocol for a diagnostic testing study. PLoS One 2023; 18:e0281221. [PMID: 37948425 PMCID: PMC10637656 DOI: 10.1371/journal.pone.0281221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2023] [Accepted: 09/10/2023] [Indexed: 11/12/2023] Open
Abstract
BACKGROUND Carpal Tunnel Syndrome (CTS) is the most common compressive neuropathy, accounting for 90% of all neuropathies. Its prevalence ranges from 3.8%-7.8% in the population. The gold standard for its diagnosis is the neurophysiological study (85% sensitivity and 95% specificity), with the disadvantage of being invasive, complex and expensive, which means an increase in cost and time for the diagnosis of the disease. The main objective of this diagnostic test evaluation study is to investigate the value of ultrasound in the diagnosis of CTS, and among the secondary objectives, to establish the ultrasound parameters that are predictors of CTS in comparison with neurophysiological studies, attempting to standardize a protocol and reference values that determine the presence or absence of CTS. METHODS Prospective, cross-sectional study. The reference test with which we compared the ultrasound is the neurophysiological test (NPT). Patients will come consecutively from the Neurophysiology Department of the Virgen Macarena Hospital, with clinical suspicion of CTS and fulfilling the inclusion/exclusion criteria. To calculate the sample size (EPIDAT program) we proposed a sensitivity of 78% and specificity of 87% with a confidence level of 95%, requiring 438 patients (264 NPT positive, 174 NPT negative). We followed an ultrasound study protocol that included the ultrasound variables: cross-sectional area at the entrance and exit of the tunnel, range of nerve thinning, wrist-forearm index, flexor retinaculum bulging, power Doppler uptake and the existence of adjacent wrists or masses. We propose a timeline for the study to be performed between 2020 and 2023. Finally, we propose a cost-effectiveness analysis. DISCUSSION Ultrasound not only allows to objectify the alterations of the median nerve but also the underlying pathological mechanisms in CTS. A multitude of ultrasound parameters have been described that should be regarded in syndrome's study, among which we included the cross-sectional area, the range of nerve thinning, the wrist-forearm index, flexor retinaculum bulging, power Doppler uptake and assessment of anatomical alterations. The use of ultrasound as a diagnostic tool in CTS has many advantages for both doctors and the patients, as it is a non-invasive, convenient, and fast tool increasingly accessible to professionals. TRIAL REGISTRATION Trials registry number: NCT05556278.
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Yiğit F, Ordahan B. Effects of high-intensity laser therapy on pain, functional status, hand grip strength, and median nerve cross-sectional area by ultrasonography in patients with carpal tunnel syndrome. Lasers Med Sci 2023; 38:248. [PMID: 37906312 DOI: 10.1007/s10103-023-03913-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 10/19/2023] [Indexed: 11/02/2023]
Abstract
The aim of this study was to evaluate the effects of high intensity laser therapy (HILT) on pain, functional status, hand grip strength, and median nerve cross-sectional area by ultrasonography in patients with carpal tunnel syndrome. Sixty patients who were diagnosed with carpal tunnel syndrome were included in the study. The patients observed during the research were randomly divided into two groups with 30 patients in each group. Splint+ exercise and HILT (pulsed mode with a power of 8.0 W and energy density of 8 J/cm2 for 1.40 minutes for every 25 cm2, continuous mode with a power of 3.0 W and energy density of 80 J/cm2 for 11 minutes for each 25 cm2; total 10 sessions 5 days a week) were applied for 2 weeks for the first group, and splint+exercise and sham laser treatment were applied for 2 weeks for the second group. Randomization was undertaken with the assistance of a computer-generated random number table before beginning the treatment processes. The patients were evaluated with the determined scales before the treatment, at the end of the treatment, and at the 3rd month. Hydraulic hand dynamometer was used to measure hand grip strength, visual analog scale (VAS) for pain, Boston CTS Questionnaire to assess function, and ultrasonography to measure median nerve cross-sectional area. The impact of time on the change in VAS levels was found to be of statistical significance within each group of patients (p<0.001), but between-group comparisons did not yield significant results (p<0.454). The effects of time on variations in Boston CTS Questionnaire scores were found to have been of statistical significance for both groups (p<0.001), but significance was not subsequently observed when the results of the two groups were compared on a between-group basis (p=0.226 and p=0.973 for the FSS and SSS, respectively). While time had a statistically significant effect on the change in hand grip strength for both groups (p=0.000), between-group comparisons statistical significance finding in favor of HILT was found in the early period (p=0.012). The time-group association patterns of the groups showed significant difference (p=0.025). While time had a statistically significant effect on the changes in the median cross-sectional areas of the nerve for the patients of both treatment groups (p<0.001), between-group comparisons yielded no findings of statistical significance (p=0.438). The time-group relationship patterns of the groups were found to reflect statistical significance (p=0.001). In conclusion, the results of the research presented here have confirmed that hand grip strength may increase and the median nerve's cross-sectional area may decrease upon the application of high-intensity laser for individuals experiencing CTS. However, this effect was demonstrated here only in the short-term and the evidence was not maintained through the course of follow-up of a longer duration.
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Affiliation(s)
- Fatih Yiğit
- Meram Medical School, Department of Physical Medicine and Rehabilitation, Necmettin Erbakan University, 42000, Konya, Meram, Turkey
| | - Banu Ordahan
- Meram Medical School, Department of Physical Medicine and Rehabilitation, Necmettin Erbakan University, 42000, Konya, Meram, Turkey.
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Tawfik EA, Cartwright MS, van Alfen N, Axer H, Boon AJ, Crump N, Grimm A, Hobson-Webb LD, Kerasnoudis A, Mandeville R, Preston DC, Sakamuri S, Shahrizaila N, Shin S, Shook SJ, Wilder-Smith E, Walker FO. Neuromuscular ultrasound standardized scanning techniques and protocols: Expert panel recommendations. Muscle Nerve 2023; 68:375-379. [PMID: 37074101 DOI: 10.1002/mus.27830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2022] [Revised: 03/30/2023] [Accepted: 04/01/2023] [Indexed: 04/20/2023]
Abstract
Neuromuscular ultrasound has become an integral part of the diagnostic workup of neuromuscular disorders at many centers. Despite its growing utility, uniform standard scanning techniques do not currently exist. Scanning approaches for similar diseases vary in the literature creating heterogeneity in the studies as reported in several meta-analysis. Moreover, neuromuscular ultrasound experts including the group in this study have different views with regards to technical aspects, scanning protocols, and the parameters that should be assessed. Establishing standardized neuromuscular scanning protocols is essential for the development of the subspeciality to ensure uniform clinical and research practices. Therefore, we aimed to recommend consensus-based standardized scanning techniques and protocols for common neuromuscular disorders using the Delphi approach. A panel of 17 experts participated in the study, which consisted of three consecutive electronic surveys. The first survey included voting on six scanning protocols addressing the general scanning technique and five common categories of suspected neuromuscular disorders. The subsequent surveys focused on refining the protocols and voting on new steps, rephrased statements, or areas of non-agreement. A high degree of consensus was achieved on the general neuromuscular ultrasound scanning technique and the scanning protocols for focal mononeuropathies, brachial plexopathies, polyneuropathies, amyotophic lateral sclerosis, and muscle diseases. In this study, a group of neuromuscular ultrasound experts developed six consensus-based neuromuscular ultrasound scanning protocols that may serve as references for clinicians and researchers. The standardized protocols could also aid in achieving high-quality uniform neuromuscular ultrasound practices.
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Affiliation(s)
- Eman A Tawfik
- Department of Physical Medicine & Rehabilitation, Faculty of Medicine, Ain Shams University, Cairo, Egypt
| | - Michael S Cartwright
- Department of Neurology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
| | - Nens van Alfen
- Department of Neurology and Clinical Neurophysiology, Donders Institute for Brain, Cognition, and Behavior, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Hubertus Axer
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, Jena, Germany
| | - Andrea J Boon
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, Minnesota, USA
| | - Nicholas Crump
- Department of Neurology, Austin Health and University of Melbourne, Heidelberg, Australia
| | - Alexander Grimm
- Department of Neurology, University Hospital Tuebingen, Tuebingen, Germany
| | - Lisa D Hobson-Webb
- Department of Neurology, Neuromuscular Division, Duke University School of Medicine, Durham, North Carolina, USA
| | | | - Ross Mandeville
- Department of Neurology, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
| | - David C Preston
- Neurological Institute, University Hospitals, Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Sarada Sakamuri
- Department of Neurology and Neurological Sciences, Stanford University, Stanford, California, USA
| | - Nortina Shahrizaila
- Division of Neurology, Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Susan Shin
- Department of Neurology, Mount Sinai School of Medicine, New York, New York, USA
| | - Steven J Shook
- Neuromuscular Center, Neurological Institute, Cleveland Clinic, Cleveland, Ohio, USA
| | - Einar Wilder-Smith
- Department of Neurology, Kantonsspital, Lucerne, Switzerland
- Department of Neurology, University of Berne, Bern, Switzerland
| | - Francis O Walker
- Department of Neurology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
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16
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Goedee HS, Lieba-Samal D. Neuromuscular ultrasound protocols: First steps, future challenges. Muscle Nerve 2023; 68:341-344. [PMID: 37523495 DOI: 10.1002/mus.27941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/04/2023] [Accepted: 07/08/2023] [Indexed: 08/02/2023]
Abstract
See article on pages 375–379 in this issue.
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Affiliation(s)
- H Stephan Goedee
- Department of Neurology and Neurosurgery, UMC Utrecht Brain Center, UMC Utrecht, Utrecht, The Netherlands
| | - Doris Lieba-Samal
- Neurology Practice, Medical Center Gallneukirchen, Gallneukirchen, Austria
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Roll SC, Takata SC, Yao B, Kysh L, Mack WJ. Sonographic reference values for median nerve cross-sectional area: A meta-analysis of data from healthy individuals. JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY 2023; 39:492-506. [PMID: 37654772 PMCID: PMC10468154 DOI: 10.1177/87564793231176009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
Abstract
Objective Establish median nerve CSA reference values and identify patient-level factors impacting diagnostic thresholds. Methods Studies were identified through a robust search of multiple databases, and quality assessment was conducted using a modified version of the National Institute of Health Study Quality Assessment Tool for Observational Cohort and Cross-Sectional Studies. A meta-analysis was performed to identify normative values stratified by anatomic location. A meta-regression was conducted to examine heterogeneity effects of age, sex, and laterality. Results The meta-analysis included 73 studies; 41 (56.2%) were high quality. The median nerve CSA [95% CI] was 6.46mm2 [6.09-6.84], 8.68mm2 [8.22-9.13], and 8.60mm2 [8.23-8.97] at the proximal forearm, the carpal tunnel inlet, and the proximal carpal tunnel, respectively. Age was positively associated with CSA at the level of proximal carpal tunnel (β=0.03mm2, p=0.047). Men (9.42mm2, [8.06-10.78]) had statistically larger proximal tunnel CSA (p = 0.03) as compared to women (7.71mm2, [7.01-8.42]). No difference was noted in laterality. Conclusion A reference value for median nerve CSA in the carpal tunnel is 8.60mm2. Adjustments may be required in pediatrics or older adults. The diagnostic threshold of 10.0mm2 for male patients should be cautiously applied as the upper limit of normative averages surpasses this threshold.
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Affiliation(s)
- Shawn C. Roll
- Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Sandy C. Takata
- Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Buwen Yao
- Chan Division of Occupational Science and Occupational Therapy, University of Southern California, Los Angeles, CA, USA
| | - Lynn Kysh
- Institute for Nursing and Interprofessional Research, Children’s Hospital Los Angeles, Los Angeles, CA, USA
| | - Wendy J. Mack
- Division of Population and Public Health, University of Southern California, Los Angeles, CA, USA
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Sertbas Y, Dortcan N, Derin Cicek E, Sertbas M, Okuroglu N, Erman H, Ozdemir A. The role of ultrasound in determining the presence and severity of carpal tunnel syndrome in diabetic patients. J Investig Med 2023; 71:655-663. [PMID: 37148181 DOI: 10.1177/10815589231167360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Carpal tunnel syndrome (CTS) is seen in 5% of the population and 14%-30% in diabetics. Although electrophysiological tests are used as the gold standard method in the diagnosis, alternative methods are being studying. We aimed to investigate whether the measurement of median nerve cross-sectional area (CSA) by ultrasound is associated with the presence and severity of CTS. This prospective, cross-sectional observational study includes 128 randomly selected T2DM patients. Electrodiagnostic study was performed for all patients to diagnose CTS. Median nerve CSA were measured with ultrasound examination. The severity of the CTS was determined by Padua method. Among 128 diabetes mellitus (DM) patients, 54 (28%) had CTS and 53 (41%) had diabetic peripheral polyneuropathy. The mean duration of DM was 11.55 years. Median nerve CSAs of the patients were significantly higher in patients with CTS (CTS (-): 10.47 ± 2.67 vs CTS: (+) 12.37 ± 3.17; p < 0.001). Median nerve CSA cutoff value of >10 mm2 predicts the diagnosis of CTS. However, minimal, mild, and moderate CTS groups had similar CSA according to Padua classification (p > 0.05 for all). CSA measurement with ultrasonography can be used as an effective method in diagnosing severe CTS disease. However, median nerve CSA values should not be used to reveal the severity of CTS, in order not to miss the demonstration of minimal, mild, and moderate groups, as well as being an indicator of only the severe CTS group.
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Affiliation(s)
- Yasar Sertbas
- Department of Internal Medicine, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
| | - Nimet Dortcan
- Department of Neurology, Avicenna Hospital, Istanbul, Turkey
| | - Esin Derin Cicek
- Department of Radiology, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
| | - Meltem Sertbas
- Department of Internal Medicine, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
| | - Nalan Okuroglu
- Department of Internal Medicine, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
| | - Hande Erman
- Department of Internal Medicine, University of Health Sciences, Kartal Dr Lutfi Kirdar City Hospital, Istanbul, Turkey
| | - Ali Ozdemir
- Department of Internal Medicine, University of Health Sciences, Fatih Sultan Mehmet Education and Research Hospital, Istanbul, Turkey
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19
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Portland TE, Strowd RE, Cartwright MS. Pearls & Oy-sters: Case of Atypical Peripheral Nerve Findings Following Paclitaxel for Breast Cancer. Neurology 2023; 101:e451-e454. [PMID: 36878699 PMCID: PMC10435055 DOI: 10.1212/wnl.0000000000207175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2022] [Accepted: 01/26/2023] [Indexed: 03/08/2023] Open
Abstract
Neuromuscular ultrasound (NMUS) is a valuable tool in establishing a diagnosis of carpal tunnel syndrome (CTS) and can be particularly helpful in patients with clinical CTS but normal nerve conduction studies (NCSs). This case involves the uncommon presentation of enlarged median nerves on NMUS with normal NCS in a patient with breast cancer who developed chemotherapy-induced peripheral neuropathy and CTS after taxane treatment. This case demonstrates that CTS should not be excluded based on electrodiagnostic studies alone, and comorbid CTS should be considered in patients receiving neurotoxic chemotherapy, even in the setting of normal NCS.
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Affiliation(s)
- Taylor E Portland
- From the Department of Neurology, Wake Forest School of Medicine, Winston-Salem, NC.
| | - Roy E Strowd
- From the Department of Neurology, Wake Forest School of Medicine, Winston-Salem, NC
| | - Michael S Cartwright
- From the Department of Neurology, Wake Forest School of Medicine, Winston-Salem, NC
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20
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Teunis T, Domico A, Ring D, Fowler J. Diagnosis of Mild-to-moderate Idiopathic Median Neuropathy at the Carpal Tunnel Based on Signs and Symptoms is Discordant From Diagnosis Based on Electrodiagnostic Studies and Ultrasound. Clin Orthop Relat Res 2023; 482:00003086-990000000-01252. [PMID: 37404022 PMCID: PMC10723843 DOI: 10.1097/corr.0000000000002751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 05/07/2023] [Accepted: 06/02/2023] [Indexed: 07/06/2023]
Abstract
BACKGROUND Although idiopathic median neuropathy at the carpal tunnel (IMNCT) is objective and verifiable, distinction of normal and abnormal nerves is imprecise and probabilistic. The associated symptoms and signs (carpal tunnel syndrome [CTS]) vary, particularly for nonsevere (mild and moderate) median neuropathy. Discordance between diagnosis of mild or moderate median neuropathy at the carpal tunnel using symptoms and signs and diagnosis based on objective tests is a measure of the potential for overdiagnosis and overtreatment. QUESTION/PURPOSE What is the difference in the estimated prevalence of mild-to-moderate IMNCT using nonsevere signs and symptoms compared with the estimated prevalence using electrodiagnostic studies (EDS) and ultrasound (US)? METHODS We used data from an existing cross-sectional data registry. To create this registry, between January 2014 and January 2019, we considered all new adult English-speaking people who had an EDS that included the median nerve or people with a diagnosis of CTS who did not have surgery yet. A small and unrecorded number of people declined participation. The cross-sectional area of the median nerve at the distal wrist crease using US in people who already had EDS was measured. People with a diagnosis of CTS underwent both EDS and US. The six signs and symptoms of Carpal Tunnel Syndrome 6 (CTS-6, a validated tool to estimate the probability of IMNCT using ratings of symptoms and signs of CTS) were recorded. This resulted in a registry of 185 participants; we excluded 75 people for obvious, severe IMNCT (defined as nonrecordable nerve conduction velocity, thenar atrophy, or greater than 5 mm 2-point discrimination). Three of the 110 qualifying patients had missing information on ethnicity or race, but we accounted for this in our final analysis. Without a reference standard, as is the case with IMNCT, latent class analysis (LCA) can be used to establish the probability that an individual has specific pathophysiologic findings. LCA is a statistical method that identifies sets of characteristics that tend to group together. This technique has been used, for example, in diagnosing true scaphoid fractures among suspected fractures based on a combination of demographic, injury, examination, and radiologic variables. The prevalence of mild-to-moderate IMNCT was estimated in two LCAs using four signs and symptoms characteristic of mild-to-moderate IMNCT, as well as EDS and US measures of median neuropathy. RESULTS The estimated prevalence of mild-to-moderate IMNCT based on signs and symptoms was 73% (95% CI 62% to 81%), while the estimated prevalence using EDS and US measurements was 51% (95% CI 37% to 65%). CONCLUSION The notable discordance of 22% between the estimated prevalence of mild-to-moderate IMNCT using signs and symptoms and prevalence based on EDS and US criteria, and the overlapping CIs of the probability estimations, indicate considerable uncertainty and a corresponding notable potential for underdiagnosis or overdiagnosis. When signs and symptoms suggest mild-to-moderate median neuropathy and surgery is being considered, patients and clinicians might consider additional testing, such as EDS or US, to increase the probability of actual median neuropathy that can benefit from surgery. We might benefit from a more accurate and reliable diagnostic strategy or tool for mild-to-moderate IMNCT; this might be the focus of a future study. LEVEL OF EVIDENCE Level III, diagnostic study.
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Affiliation(s)
- Teun Teunis
- Department of Plastic Surgery, University Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA
| | - Adam Domico
- First Settlement Orthopaedics, Marietta, OH, USA
| | - David Ring
- Dell Medical School, the University of Texas at Austin, Austin, TX, USA
| | - John Fowler
- Department of Orthopaedic Surgery, University Pittsburgh Medical Center, University of Pittsburgh, Pittsburgh, PA, USA
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21
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Bennett OM, Sears ED. The Impact of Reference Standard on Diagnostic Testing Characteristics for Carpal Tunnel Syndrome: A Systematic Review. PLASTIC AND RECONSTRUCTIVE SURGERY-GLOBAL OPEN 2023; 11:e5067. [PMID: 37404780 PMCID: PMC10317486 DOI: 10.1097/gox.0000000000005067] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Accepted: 04/28/2023] [Indexed: 07/06/2023]
Abstract
Lack of a reliable reference standard for carpal tunnel syndrome (CTS) diagnosis could impact the diagnostic test characteristics. This systematic review sought to evaluate differences in the accuracy of CTS diagnostic modalities based on the reference standard used. Methods A systematic review was performed following PRISMA guidelines to investigate diagnostic modalities used in CTS. A literature search of Embase, PubMed, and Cochrane Reviews was conducted for the years of 2010-2021 for primary data, and 113 studies met final inclusion criteria. Studies were stratified based on the reference standard utilized and diagnostic modality assessed, and the weighted means of the sensitivities and specificities were calculated. Results Thirty-five studies used clinical diagnosis alone as a reference standard, and 78 studies used electrodiagnostic study (EDS). The specificity for MRI and ultrasound (US) were substantially lower when EDS was used as the reference standard. MRI was the test most affected by the reference standard used, showing increased sensitivity when using EDS as the reference compared to clinical diagnosis (77.1% versus 60.9%) and decreased specificity (87.6% versus 99.2%). Regardless of the reference standard used, all tests had anticipated false-positive and/or false-negative rates of at least 10%. Conclusions Testing characteristics vary greatly based on the choice of reference standard, with the sensitivity of MRI most affected. Regardless of reference standard used, EDS, US, and MRI each had false-positive and/or false-negative rates too great to be appropriate for use as a screening examination.
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Affiliation(s)
| | - Erika D Sears
- From the University of Michigan Medical School, Ann Arbor, Mich
- Department of Surgery, Section of Plastic Surgery, Michigan Medicine, Ann Arbor, Mich
- Veterans Affairs Center for Clinical Management Research, VA Ann Arbor Healthcare System, Ann Arbor, Mich
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22
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Ngaage LM, Casey PM, Giladi AM. Utility of Ultrasound for Identifying Median Nerve Changes Indicative of Acute Carpal Tunnel Syndrome After Distal Radius Fracture. JOURNAL OF HAND SURGERY GLOBAL ONLINE 2023; 5:430-434. [PMID: 37521560 PMCID: PMC10382869 DOI: 10.1016/j.jhsg.2023.03.013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2023] [Accepted: 03/29/2023] [Indexed: 08/01/2023] Open
Abstract
Purpose Ultrasound offers a fast and inexpensive way to evaluate the median nerve. However, there is a paucity of data assessing ultrasound in acute trauma. Our study aimed to characterize median nerve changes indicative of acute carpal tunnel syndrome (ACTS) in a cadaveric distal radius fracture (DRF) model. Methods We used 10 upper-extremity specimens. We induced ACTS (carpal tunnel pressure >40 mm Hg) in a distraction-only model and then used a DRF model as a neutral position, under traction, or wrist extension. We measured the median nerve cross-sectional area (CSA), height, and width with ultrasound in each model. We used a novel calculation, height-width ratio (HWR), to describe nerve shape. A low HWR indicates an elliptical shape; as the HWR increases toward one, the shape becomes more circular. The CSA measurements and HWR at pressures >40 mm Hg were used to calculate a 95% confidence interval, which defined the threshold for ACTS. Results Wrist distraction created carpal tunnel pressures >40 mm Hg in all specimens. Distraction increased CSA compared with baseline (9.1 ± 0.9 mm2 vs 6.3 ± 1.2 mm2, P < .001). Under ACTS-level pressures, the thresholds for CSA and HWR were 8.5 mm2 and 0.41, respectively. HWR significantly increased with distraction compared with baseline (0.47 ± 0.10 vs 0.28 ± 0.09, P = .006). Most neutral DRF models (n = 8, 80%) met the CSA threshold for ACTS, whereas all specimens with a DRF extended or under traction had CSAs above the ACTS threshold. Compared to the baseline, the shape of the median nerve was more circular in all DRFs, including neutral (0.28 ± 0.09 vs 0.39 ± 0.13), under traction (0.43 ± 0.09), and extended (0.45 ± 0.09). Conclusions ACTS should be suspected in patients with median nerves demonstrating increased CSA and adopting a more circular shape. Fracture positioning impacts median nerve CSA with wrist extension, causing the greatest change. Median nerve HWR may offer an easier ultrasonographic alternative to CSA. Type of study/level of evidence Diagnostic III.
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Affiliation(s)
- Ledibabari M. Ngaage
- The Curtis National Hand Center, MedStar Union Memorial Hospital, Baltimore, MD
- Department of Plastic and Reconstructive Surgery, Johns Hopkins University School of Medicine, Baltimore, MD
| | - Peter M. Casey
- The Curtis National Hand Center, MedStar Union Memorial Hospital, Baltimore, MD
| | - Aviram M. Giladi
- The Curtis National Hand Center, MedStar Union Memorial Hospital, Baltimore, MD
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23
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McGurk K, Tracey JA, Daley DN, Daly CA. Diagnostic Considerations in Compressive Neuropathies. JOURNAL OF HAND SURGERY GLOBAL ONLINE 2023; 5:525-535. [PMID: 37521550 PMCID: PMC10382896 DOI: 10.1016/j.jhsg.2022.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2022] [Accepted: 10/14/2022] [Indexed: 12/23/2022] Open
Abstract
Peripheral nerve compression of the upper extremity is a common pathology often necessitating surgical intervention, much is known, but much more is left to understand. For the more common pathologies, carpal tunnel syndrome, cubital tunnel syndrome, and ulnar tunnel syndrome, research and clinical efforts directed toward standardization and reduction of resource use have been attempted with varied success. Diagnosis of many of these syndromes is largely based on a proper history and physical examination. Electrodiagnostic studies continue to have value, but proportionally less than previous decades. In addition, emerging technologies, including magnetic resonance neurography, novel ultrasound evaluation techniques, and ultrasound-guided diagnostic injections, are beginning to demonstrate their ability to add value to the diagnostic algorithm, particularly when less common compressive neuropathies are present and/or the diagnosis is in question.
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Affiliation(s)
- Katherine McGurk
- Department of Orthopedic Surgery, Medical University of South Carolina Charleston, SC
| | - Joseph Anthony Tracey
- Department of Orthopedic Surgery, Medical University of South Carolina Charleston, SC
| | - Dane N. Daley
- Department of Orthopedic Surgery, Medical University of South Carolina Charleston, SC
| | - Charles Andrew Daly
- Department of Orthopedic Surgery, Medical University of South Carolina Charleston, SC
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Güleç GG, Aktaş İ. Carpal Tunnel Symptoms With Normal Nerve Conduction Study Findings in Patients With Bifid Median Nerve Treated With Ultrasound-Guided 5% Dextrose Hydrodissection: A Case Series. Cureus 2023; 15:e36669. [PMID: 37102005 PMCID: PMC10124671 DOI: 10.7759/cureus.36669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/25/2023] [Indexed: 03/29/2023] Open
Abstract
The most common entrapment neuropathy is carpal tunnel syndrome (CTS), which is caused by compression of the median nerve as it travels through the carpal tunnel in the wrist. Nerve conduction studies (NCS) and ultrasound were used to diagnose CTS but neither method is 100% accurate. The benefit of perineural dextrose injection has been supported in the literature. This article presents three cases with bifid median nerve (BMN) in whom median nerve entrapments were not detected with NCS, and symptom relief was provided with hydrodissection with 2 ml 5% dextrose.
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Shin KJ, Yi J, Hahn S. Shear-wave elastography evaluation of thenar muscle in carpal tunnel syndrome. JOURNAL OF CLINICAL ULTRASOUND : JCU 2023; 51:510-517. [PMID: 36201602 DOI: 10.1002/jcu.23359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2022] [Revised: 09/21/2022] [Accepted: 09/23/2022] [Indexed: 06/16/2023]
Abstract
PURPOSE We aim to evaluate the shear wave velocity (SWV) of the thenar muscle as an adjunct diagnostic tool for carpal tunnel syndrome (CTS). METHODS Ninety-two wrists with CTS and 30 control wrists without CTS underwent ultrasonographic evaluation of thenar muscle and median nerve including shear-wave elastography. Cross sectional area (CSA) of medial nerve and SWV of thenar muscle and median nerve were evaluated. CTS patients were assessed for Boston CTS, Padua CTS, modified Hirani grading scores, and nerve conduction study (NCS). SWVs, CSA, and NCS parameters were compared between two groups. RESULTS The SWVs of thenar muscle and median nerve (p < 0.001, respectively), and CSA of median nerve (p < 0.001) were more significantly greater in patients with CTS than in controls. The SWV of median nerve was moderately correlated with CSA of median nerve (r = 0.35, p < 0.001) and modified Hirani CTS score (r = 0.35, p < 0.001). The SWV of thenar muscle was inversely correlated with modified Hirani CTS score (r = -0.21, p = 0.04). CONCLUSION The SWV of thenar muscle and median nerve of CTS were significantly increased compared to that of control, and significantly negatively correlated with NCS parameters (modified Hirani CTS score). SWVs may be used as an adjunct diagnostic tool for CTS.
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Affiliation(s)
- Kyong Jin Shin
- Department of Neurology, Haeundae-Paik Hospital, Inje University College of Medicine, Busan, South Korea
| | - Jisook Yi
- Department of Radiology, Haeundae-Paik Hospital, Inje University College of Medicine, Busan, South Korea
| | - Seok Hahn
- Department of Radiology, Haeundae-Paik Hospital, Inje University College of Medicine, Busan, South Korea
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Walker FO. A 15-Year Review of Clinical Practice Patterns in Carpal Tunnel Syndrome Based on Continuous Certification by the American Board of Plastic Surgery. Plast Reconstr Surg 2023; 151:524e-525e. [PMID: 36730144 DOI: 10.1097/prs.0000000000009944] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Francis O Walker
- Wake Forest School of Medicine, Medical Center Boulevard, Winston-Salem, NC 27157-1078,
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Uz C, Umay E. Ultrasonographic measurement of median nerve and wrist skin thickness in patients with carpal tunnel syndrome: relationship with clinical, electrophysiologic and functionality. Acta Orthop Belg 2023; 89:167-172. [PMID: 37295003 DOI: 10.52628/89.1.11029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
The study aimed to investigate the relationship between the proximal and distal cross-sectional area (CSA) of the median nerve and wrist skin thickness measured by ultrasound in patients with carpal tunnel syndrome (CTS), demographics, disease characteristics, electrophysiological measurements, symptom severity, functionality, and symptom severity. 98 patients with electrophysiological diagnoses of CTS in the dominant hand were included in the study. Proximal and distal CSAs of the median nerve and wrist skin thickness were measured ultrasonographically. Demographic and disease characteristics of the patients were recorded. Patients were evaluated with the Historical-Objective scale (Hi- Ob) for clinical staging, the Functional status scale (FSS) for functional status, and the Boston symptom severity scale (BSSS) for symptom severity. Ultrasonographic findings were correlated with demographic and disease characteristics, electrophysiological findings, Hi-Ob scala, Functional status scale (FSS), and Boston symptom severity scale (BSSS). Proximal median nerve CSA median was 11.0 (7.0-14.0) mm2, distal median nerve CSA median was 10.5 (5.0-18.0) mm2, and wrist skin thickness was measured 1.10 (0.6-1.40) mm. Median nerve CSAs were positively correlated with the CTS stage and FSS, negatively correlated with the sensory nerve action potential of the median nerve (SNAP) and the compound muscle action potential of the median nerve (CMAP) ( p<0.05). Wrist skin thickness was positively correlated with disease characteristics, including the presence of paresthesia and loss of dexterity and FSS and BSSS levels. Ultrasonographic measurements in CTS are associated with functionality rather than demographics. Especially the increase in wrist skin thickness leads to an increase in symptom severity.
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Weil EL, Nakawah MO, Masdeu JC. Advances in the neuroimaging of motor disorders. HANDBOOK OF CLINICAL NEUROLOGY 2023; 195:359-381. [PMID: 37562878 DOI: 10.1016/b978-0-323-98818-6.00039-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Neuroimaging is a valuable adjunct to the history and examination in the evaluation of motor system disorders. Conventional imaging with computed tomography or magnetic resonance imaging depicts important anatomic information and helps to identify imaging patterns which may support diagnosis of a specific motor disorder. Advanced imaging techniques can provide further detail regarding volume, functional, or metabolic changes occurring in nervous system pathology. This chapter is an overview of the advances in neuroimaging with particular emphasis on both standard and less well-known advanced imaging techniques and findings, such as diffusion tensor imaging or volumetric studies, and their application to specific motor disorders. In addition, it provides reference to emerging imaging biomarkers in motor system disorders such as Parkinson disease, amyotrophic lateral sclerosis, and Huntington disease, and briefly reviews the neuroimaging findings in different causes of myelopathy and peripheral nerve disorders.
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Affiliation(s)
- Erika L Weil
- Department of Neurology, University of Michigan, Ann Arbor, MI, United States; Stanley H. Appel Department of Neurology, Houston Methodist Hospital, Houston, TX, United States.
| | - Mohammad Obadah Nakawah
- Stanley H. Appel Department of Neurology, Houston Methodist Hospital, Houston, TX, United States; Department of Neurology, Weill Cornell Medicine, New York, NY, United States
| | - Joseph C Masdeu
- Stanley H. Appel Department of Neurology, Houston Methodist Hospital, Houston, TX, United States; Department of Neurology, Weill Cornell Medicine, New York, NY, United States
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Tezcan EA, Levendoglu F, Durmaz MS, Kara H, Batur EB, Gezer IA, Korez MK. Carpal Tunnel Syndrome in Patients with Psoriatic Arthritis: Ultrasonography and Magnetic Resonance Imaging Findings. JOURNAL OF RHEUMATIC DISEASES 2023; 30:36-44. [PMID: 37476525 PMCID: PMC10351357 DOI: 10.4078/jrd.22.0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 11/24/2022] [Accepted: 11/24/2022] [Indexed: 07/22/2023]
Abstract
Objective The aim of the present study is to assess carpal tunnel syndrome's (CTS's) ultrasonography (US) and magnetic resonance imaging (MRI) findings in patients with psoriatic arthritis (PsA) and compare them with healthy controls. Methods Thirty-nine PsA and twenty-eight healthy volunteers were examined in this study. Demographic and clinical features were recorded. CTS-6, a diagnostic algorithm, was used to estimate the probability of CTS. Electrodiagnostic study (EDS) was applied to all wrists included in the report, where the diagnosis of CTS was made by EDS. The cross-sectional area (CSA) of the median nerve was measured at pisiform bone level by US and MRI. Results Regarding to the demographic characteristics, no statistically significant difference was found between the groups. Twelve of 39 (30.76%) PsA patients had CTS, whereas CTS was not detected in the control group (p=0.001). US and MRI showed increased median nerve CSA in PsA patients compared to healthy controls (p=0.005, p<0.001; respectively). Also, US and MRI showed increased median nerve CSA in CTS patients compared to others (p=0.002, p<0.001; respectively). The Pearson correlation coefficient between MRI and US measurements of the CSA was 0.85 (p<0.001). Conclusion CTS frequency in PsA patients is found higher than healthy controls. The relationship between CTS diagnosed by EDS and CSA measured by both US and MRI was observed in PsA patients.
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Affiliation(s)
- Ezgi Akyildiz Tezcan
- Department of Physical Medicine and Rehabilitation, Cumra State Hospital, Konya, Turkey
| | - Funda Levendoglu
- Department of Physical Medicine and Rehabilitation, Konya, Turkey
| | | | - Hasan Kara
- Department of Physical Medicine and Rehabilitation, Erciyes University Medical Faculty, Kayseri, Turkey
| | | | | | - Muslu Kazım Korez
- Department of Biostatistics, Selcuk University Medical Faculty, Konya, Turkey
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Wu H, Zhao HJ, Xue WL, Wang YC, Zhang WY, Wang XL. Ultrasound and elastography role in pre- and post-operative evaluation of median neuropathy in patients with carpal tunnel syndrome. Front Neurol 2022; 13:1079737. [PMID: 36588903 PMCID: PMC9800593 DOI: 10.3389/fneur.2022.1079737] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 11/23/2022] [Indexed: 12/23/2022] Open
Abstract
Introduction Carpal tunnel syndrome (CTS) is a common compression neuropathy of the median nerve in the wrist. Early diagnosis of CTS is essential for selecting treatment options and assessing prognosis. The current diagnosis of CTS is based on the patient's clinical symptoms, signs, and an electromyography (EMG) test. However, they have some limitations. Recently, ultrasound has been adopted as an adjunct diagnostic tool for electromyography (EMG). Ultrasound is a non-invasive and cost-effective technique. It provides a dynamic display of morphological changes in the median nerve and an assessment of CTS etiology such as tenosynovitis, mass compression, and tendon disease. This study aimed to investigate the value of conventional ultrasound and real-time shear wave elastography (SWE) in evaluation of median neuropathy in patients with carpal tunnel syndrome (CTS) before and after surgery. Methods First, the Boston Carpal Tunnel Questionnaire (BCTQ) was administered to patients with CTS. All subjects were measured at three levels: the distal 1/3 of the forearm, the carpal tunnel inlet, and the distal carpal tunnel using conventional ultrasound and SWE. Median nerve parameters were examined in patients with CTS 1 week after surgery. Results The cross-sectional area (CSA) and stiffness of the median nerve at the carpal tunnel inlet and distal carpal tunnel were significantly higher in patients with CTS than in healthy controls (p < 0.001). The CSA and stiffness of the median nerve at the carpal tunnel inlet were statistically significantly significantly between pre- and postoperative patients with CTS (p < 0.001). The CSA and stiffness of the nerve in patients with CTS had a positive correlation with electrophysiology severity. Conclusions and discussion Conventional ultrasound and elastography are valuable in the diagnosis of CTS and are useful in the clinical assessment of patient's nerve recovery after operation.
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Shao J, Zhou K, Cai YH, Geng DY. Application of an Improved U2-Net Model in Ultrasound Median Neural Image Segmentation. ULTRASOUND IN MEDICINE & BIOLOGY 2022; 48:2512-2520. [PMID: 36167742 DOI: 10.1016/j.ultrasmedbio.2022.08.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/17/2022] [Revised: 08/02/2022] [Accepted: 08/03/2022] [Indexed: 06/16/2023]
Abstract
To investigate whether an improved U2-Net model could be used to segment the median nerve and improve segmentation performance, we performed a retrospective study with 402 nerve images from patients who visited Huashan Hospital from October 2018 to July 2020; 249 images were from patients with carpal tunnel syndrome, and 153 were from healthy volunteers. From these, 320 cases were selected as training sets, and 82 cases were selected as test sets. The improved U2-Net model was used to segment each image. Dice coefficients (Dice), pixel accuracy (PA), mean intersection over union (MIoU) and average Hausdorff distance (AVD) were used to evaluate segmentation performance. Results revealed that the Dice, MIoU, PA and AVD values of our improved U2-Net were 72.85%, 79.66%, 95.92% and 51.37 mm, respectively, which were comparable to the actual ground truth; the ground truth came from the labeling of clinicians. However, the Dice, MIoU, PA and AVD values of U-Net were 43.19%, 65.57%, 86.22% and 74.82 mm, and those of Res-U-Net were 58.65%, 72.53%, 88.98% and 57.30 mm. Overall, our data suggest our improved U2-Net model might be used for segmentation of ultrasound median neural images.
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Affiliation(s)
- Jie Shao
- Department of Ultrasound, Huashan Hospital, Fudan University, Shanghai, China
| | - Kun Zhou
- Academy for Engineering and Technology, Fudan University, Shanghai, China
| | - Ye-Hua Cai
- Department of Ultrasound, Huashan Hospital, Fudan University, Shanghai, China
| | - Dao-Ying Geng
- Department of Radiology, Huashan Hospital, Fudan University, Shanghai, China; Greater Bay Area Institute of Precision Medicine (Guangzhou), Fudan University, Guangzhou, China.
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Muacevic A, Adler JR. β2-Microglobulin Elevates COL5A1 mRNA in the Subsynovial Connective Tissue of Patients Receiving Hemodialysis With Carpal Tunnel Syndrome. Cureus 2022; 14:e32423. [PMID: 36514703 PMCID: PMC9742847 DOI: 10.7759/cureus.32423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/12/2022] [Indexed: 12/14/2022] Open
Abstract
Background Although carpal tunnel syndrome (CTS) is frequently observed in patients undergoing long-term hemodialysis (HD), exactly how CTS arises is unknown. Here, we examined levels of COL5A1 in the subsynovial connective tissue (SSCT) of patients receiving HD and studied its potential regulation by β2-microglobulin (Β2-MG) in SSCT-derived cells (SSCTCs). Methods We extracted SSCT samples from 67 patients with CTS (49 non-HD and 18 HD) during carpal tunnel release. The samples were subjected to quantitative polymerase chain reaction (qPCR) to determine COL5A1 expression. Further, to examine the potential regulation of COL5A1 expression by Β2-MG, SSCTCs were stimulated in the absence (control) or presence of 10 µg/ml Β2-MG. Results The HD group showed significantly elevated COL5A1 levels compared to the non-HD group (P=0.027). Moreover, treating SSCTCs with Β2-MG for 24 h increased the mRNA expression of COL5A1 relative to control conditions (P=0.013). Conclusions Elevated COL5A1 expression may form part of the mechanism underlying the development of CTS, and Β2-MG may play a role in promoting COL5A1 expression in HD patients.
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Kudo T, Yoshii Y, Hara Y, Ogawa T, Ishii T. Clinical Relevance of Ultrasonographic and Electrophysiological Findings of the Median Nerve in Unilateral Carpal Tunnel Syndrome Patients. Diagnostics (Basel) 2022; 12:diagnostics12112799. [PMID: 36428858 PMCID: PMC9689393 DOI: 10.3390/diagnostics12112799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2022] [Revised: 11/10/2022] [Accepted: 11/14/2022] [Indexed: 11/18/2022] Open
Abstract
Few studies have compared the unaffected and affected sides in the same carpal tunnel syndrome (CTS) patients using ultrasonography and electrophysiological tests. We focused on unilateral idiopathic CTS patients to investigate whether clinical test results differ between the unaffected and affected sides. The bilateral wrist joints of 61 unilateral idiopathic CTS patients were evaluated. The median nerve cross-sectional area of ultrasound image, and latencies of the compound muscle action potential (CMAP) and sensory nerve action potential (SNAP) were measured. The values obtained were compared between the affected and unaffected sides. The diagnostic accuracies of each parameter were assessed, and cut-off values were defined. Significant differences were observed in all parameters between the affected and unaffected sides (p < 0.01). Area under the curve (AUC) values were 0.74, 0.88, and 0.73 for the cross-sectional area, CMAP distal latency, and SNAP distal latency, respectively. Cut-off values were 11.9 mm2, 5.1 ms, and 3.1 ms for the cross-sectional area, CMAP distal latency, and SNAP distal latency, respectively. The most reliable parameter that reflected clinical symptoms was the distal latency of CMAP. Cut-off values for each parameter are considered to be an index for the onset of the clinical symptoms of CTS.
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Affiliation(s)
- Takamasa Kudo
- Department of Orthopedic Surgery, Tokyo Medical University Ibaraki Medical Center, Ami 300-0395, Ibaraki, Japan
| | - Yuichi Yoshii
- Department of Orthopedic Surgery, Tokyo Medical University Ibaraki Medical Center, Ami 300-0395, Ibaraki, Japan
- Correspondence: ; Tel.: +81-29-887-1161
| | - Yuki Hara
- Department of Orthopedic Surgery, University of Tsukuba Hospital, Tsukuba 305-8577, Ibaraki, Japan
| | - Takeshi Ogawa
- Department of Orthopaedic Surgery, Mito Medical Center, Mito 311-3193, Ibaraki, Japan
| | - Tomoo Ishii
- Department of Orthopedic Surgery, Tokyo Medical University Ibaraki Medical Center, Ami 300-0395, Ibaraki, Japan
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Zaki HA, Shaban E, Salem W, Bilal F, Fayed M, Hendy M, Abdelrahim MG, Masood M, Mohamed khair Y, Shallik NA. A Comparative Analysis Between Ultrasound and Electromyographic and Nerve Conduction Studies in Diagnosing Carpal Tunnel Syndrome (CTS): A Systematic Review and Meta-Analysis. Cureus 2022; 14:e30476. [DOI: 10.7759/cureus.30476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/19/2022] [Indexed: 11/07/2022] Open
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Le MQT, Felix ER, Irwin R, Cardenas DD, Cowan RE. Longitudinal Median Nerve Ultrasound Changes in Individuals With Spinal Cord Injury and an Age- and Sex-Matched Nondisabled Cohort. Arch Rehabil Res Clin Transl 2022; 4:100238. [PMID: 36545523 PMCID: PMC9761256 DOI: 10.1016/j.arrct.2022.100238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Objectives To assess the natural history for development of carpal tunnel syndrome (CTS) in persons with acute spinal cord injury (SCI) at 1 year postdischarge from initial rehabilitation and to assess baseline median nerve (MN) cross-sectional area (CSA) above/below 10 mm2 correlates with any longitudinal changes in quantitative ultrasound (US) of the MN. Design A prospective cohort study of persons with acute SCI evaluated for CTS using quantitative US and compared to a group without SCI (non-SCI). Setting Academic medical center. Participants N=69 total (N=34 SCI, N=35 non-SCI). The average age in both groups was 28 and the SCI group included 30 males and 2 females and the non-SCI group included 30 males and 3 females. Interventions Not applicable. Main Outcome Measures The primary outcome was the change in quantitative US parameters of the MN, including CSA and grayscale, from baseline to 1-year follow-up in those with SCI and those without SCI. CTS symptomatology and physical exam sum score and US measures for dominant and nondominant arms were considered secondary outcomes. Results The SCI had darker nerves at baseline (P=.036, nondominant), greater CTS symptoms at follow-up (P≤.036, bilateral), and no differences in all change scores (all P≥.056). Individuals with smaller nerves at baseline had larger increases in nerve size (P=.029, nondominant) vs those with larger nerves. Change in CTS symptoms CSA (nondominant) and nerve echogenicity (dominant) were inversely associated with their respective baseline values (all P≤.045). Conclusions We observed few differences between the SCI group and the non-SCI control group and between those with smaller vs larger MN. In general, MN pathology changes (CTS symptoms and US variables) over 1 year were more common in the nondominant arm and appear to be a function of MN pathology at enrollment. Individuals with SCI may experience increased CTS symptoms as soon as 1 year after injury.
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Affiliation(s)
- Minh Quan T. Le
- Department of Physical Medicine and Rehabilitation, University of Miami Miller School of Medicine, Miami, FL,Corresponding author Minh Quan Le, MD, Jackson Memorial Hospital, 10140 Ramblewood Dr, Coral Springs, FL 33071.
| | - Elizabeth R. Felix
- South Florida SCI Model System, Department of Physical Medicine & Rehabilitation, University of Miami Miller School of Medicine, Miami, FL,Department of Physical Medicine and Rehabilitation, Miami Veterans Administration Medical Center, Miami, FL
| | - Robert Irwin
- South Florida SCI Model System, Department of Physical Medicine & Rehabilitation, University of Miami Miller School of Medicine, Miami, FL
| | - Diana D. Cardenas
- South Florida SCI Model System, Department of Physical Medicine & Rehabilitation, University of Miami Miller School of Medicine, Miami, FL
| | - Rachel E. Cowan
- Department of Physical Medicine & Rehabilitation, University of Alabama at Birmingham, Birmingham, AL,The Miami Project to Cure Paralysis, Department of Neurosurgery, University of Miami Miller School of Medicine, Miami, FL
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How to Differentiate Pronator Syndrome from Carpal Tunnel Syndrome: A Comprehensive Clinical Comparison. Diagnostics (Basel) 2022; 12:diagnostics12102433. [PMID: 36292122 PMCID: PMC9600501 DOI: 10.3390/diagnostics12102433] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 09/27/2022] [Accepted: 09/28/2022] [Indexed: 11/17/2022] Open
Abstract
The diagnostic process that allows pronator syndrome to be differentiated reliably from carpal tunnel syndrome remains a challenge for clinicians, as evidenced by the most common cause of pronator syndrome misdiagnosis: carpal tunnel syndrome. Pronator syndrome can be caused by compression of the median nerve as it passes through the anatomical structures of the forearm, while carpal tunnel syndrome refers to one particular topographic area within which compression occurs, the carpal tunnel. The present narrative review is a complex clinical comparison of the two syndromes with their anatomical backgrounds involving topographical relationships, morphology, clinical picture, differential diagnosis, and therapeutic options. It discusses the most frequently used diagnostic techniques and their correct interpretations. Its main goal is to provide an up-to-date picture of the current understanding of the disease processes and their etiologies, to establish an appropriate diagnosis, and introduce relevant treatment benefiting the patient.
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LIM JX, WANG F, HO YX, ER JH, VIJAYAN J, SEBASTIN SJ. Normative Value of the Cross-Sectional Area of the Median Nerve at the Carpal Tunnel Inlet and Distal Forearm in the Singapore Population. J Hand Surg Asian Pac Vol 2022; 27:649-655. [DOI: 10.1142/s242483552250062x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background: Ultrasonography is often used in the diagnosis of carpal tunnel syndrome (CTS). However, we were unable to find normative data regarding the cross-sectional area (CSA) of the median nerve in the Singapore population as measured by ultrasound. The aims of this study were to establish normative values of the CSA of the median nerve at the carpal tunnel inlet in a healthy population, 5 cm proximal to the carpal tunnel inlet, and to determine if the CSA correlated with side, age, gender or race. Methods: Sixty-nine wrists of 36 healthy subjects with no history of wrist injury or any signs and symptoms of CTS were examined. The CSA of the median nerve at the carpal tunnel inlet and 5 cm proximal to the carpal tunnel inlet was determined using ultrasound by a trained operator. Results: The mean CSA of the median nerve at the carpal tunnel inlet was 6.41 mm2 (SD 2.18 mm2). These were not significantly different from the values for mean CSA obtained 5 cm proximal to the carpal tunnel inlet. We did not find any correlation between the CSA of the median nerve and age, gender or race. Conclusions: The mean CSA of the median nerve at the carpal tunnel inlet in normal subjects in Singapore was found to be lower than other Asian populations. Wide variations of the median nerve CSA at the carpal tunnel inlet exists in the literature, and this is probably due to the heterogeneity of the study methodology and population. Level of Evidence: Level III (Diagnostic)
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Affiliation(s)
- Jin X. LIM
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Feifan WANG
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Yih X.C. HO
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Jian H. ER
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
| | - Joy VIJAYAN
- Division of Neurology, Department of Medicine, National University Hospital, Singapore
| | - Sandeep J. SEBASTIN
- Department of Hand and Reconstructive Microsurgery, National University Hospital, Singapore
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Chompoopong P, Niu Z, Shouman K, Madigan NN, Sandroni P, Berini SE, Shin AY, Brault JS, Boon AJ, Laughlin RS, Thorland E, Mandrekar J, Klein CJ. Utility of carpal tunnel release and ulnar decompression in CMT1A and HNPP. Muscle Nerve 2022; 66:479-486. [PMID: 35894586 DOI: 10.1002/mus.27687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2022] [Revised: 07/20/2022] [Accepted: 07/24/2022] [Indexed: 11/10/2022]
Abstract
INTRODUCTION/AIMS Carpal and cubital tunnel syndrome (CTS, CuTS) are common among patients with hereditary neuropathy with liability to pressure-palsies (HNPP) and Charcot-Marie-Tooth-1A (CMT1A), and may impact quality of life. We aimed to evaluate the utility of nerve decompression surgeries in these patients. METHODS Medical records were reviewed for patients with PMP22 mutation confirmed in Mayo Clinic laboratories from January 1999 to December 2020, who had CTS and CuTS and underwent surgical decompression. RESULTS CTS occurred in 53.3% of HNPP and 11.5% of CMT1A, while CuTS was present in 43.3% of HNPP and 5.8% of CMT1A patients. CTS decompression occurred in 10-HNPP and 5-CMT1A patients, and CuTS decompression with/without transposition was performed in 5-HNPP and 1-CMT1A patients. In HNPP, electrodiagnostic studies identified median neuropathy at the wrist in 9/10 patients and ultrasound showed focal enlargements at carpal and cubital tunnels. In CMT1A, median and ulnar sensory responses were all absent, and the nerves were diffusely enlarged. After CTS surgery, pain, sensory loss, and strength improved in 4/5 CMT1A, and 6/10 HNPP patients. Of clinical, electrophysiologic and ultrasound findings, only activity-provoked features significantly correlated with CTS surgical benefit in HNPP patients (odds ratio=117.0:95% CI 1.94>999.99, p=0.01). One CMT1A and one HNPP patient improved with CuTS surgery while 2 HNPP patients worsened. DISCUSSION CTS symptom improvement post-surgery can be seen in CMT1A and (less frequent) in HNPP patients. CuTS surgery commonly worsened course in HNPP. Activity-provoked symptoms in HNPP best informed benefits from CTS surgery.
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Affiliation(s)
| | - Zhiyv Niu
- Department of Laboratory Medicine and Pathology, Mayo Clinic Rochester, MN
| | | | | | | | | | - Alexander Y Shin
- Department of Orthopedic Surgery, Division of Hand and Microvascular Surgery, Mayo Clinic, Rochester, MN
| | - Jeffrey S Brault
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN
| | - Andrea J Boon
- Department of Physical Medicine and Rehabilitation, Mayo Clinic, Rochester, MN
| | | | - Erik Thorland
- Department of Laboratory Medicine and Pathology, Mayo Clinic Rochester, MN
| | - Jay Mandrekar
- Quantitative health Sciences, Mayo Clinic, Rochester, MN
| | - Christopher J Klein
- Department of Neurology, Mayo Clinic, Rochester, MN.,Department of Laboratory Medicine and Pathology, Mayo Clinic Rochester, MN
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Joshi A, Patel K, Mohamed A, Oak S, Zhang MH, Hsiung H, Zhang A, Patel UK. Carpal Tunnel Syndrome: Pathophysiology and Comprehensive Guidelines for Clinical Evaluation and Treatment. Cureus 2022; 14:e27053. [PMID: 36000134 PMCID: PMC9389835 DOI: 10.7759/cureus.27053] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 07/20/2022] [Indexed: 11/07/2022] Open
Abstract
In carpal tunnel syndrome (CTS), the median nerve is compressed at the level of the carpal tunnel in the wrist. This entrapment manifests as unpleasant symptoms, such as burning, tingling, or numbness in the palm that extends to the fingers. As the disease progresses, afflicted individuals also report decreased grip strength accompanied by hand weakness and restricted movement. The first half of this review elaborates on CTS pathology by providing readers with a comprehensive understanding of the etiology, relevant anatomy, and disease mechanism. CTS is considered the most common entrapment neuropathy, affecting around 3-6% of the adult population. Further, CTS prevalence has seen a dramatic increase in the last few decades paralleling the growth of everyday technology usage. Despite how common it is to have CTS, it can be quite challenging for physicians to make a definite diagnosis due to differentials that present with overlapping symptoms. Even more difficult can be deciding on a course of treatment that is the most effective and considerate of patient needs. Thus arises the need for clear clinical direction, and hence we end with a discussion around such guidelines that serve as a starting point toward effective diagnoses and patient treatment.
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Heiling B, Wiedfeld LIEE, Müller N, Kobler NJ, Grimm A, Kloos C, Axer H. Electrodiagnostic Testing and Nerve Ultrasound of the Carpal Tunnel in Patients with Type 2 Diabetes. J Clin Med 2022; 11:jcm11123374. [PMID: 35743445 PMCID: PMC9225449 DOI: 10.3390/jcm11123374] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2022] [Revised: 06/03/2022] [Accepted: 06/10/2022] [Indexed: 12/13/2022] Open
Abstract
In diabetic patients, controversies still exist about the validity of electrodiagnostic and nerve ultrasound diagnosis for carpal tunnel syndrome (CTS). We analyzed 69 patients with type 2 diabetes. Nerve conduction studies and peripheral nerve ultrasound of the median nerve over the carpal tunnel were performed. CTS symptoms were assessed using the Boston Carpal Tunnel Questionnaire. Polyneuropathy was assessed using the Neuropathy Symptom Score and the Neuropathy Disability Score. Although 19 patients reported predominantly mild CTS symptoms, 37 patients met the electrophysiological diagnosis criteria for CTS, and six patients were classified as severe or extremely severe. The sonographic cross-sectional area (CSA) of the median nerve at the wrist was larger than 12 mm2 in 45 patients (65.2%), and the wrist-to-forearm-ratio was larger than 1.4 in 61 patients (88.4%). Receiver operating characteristic analysis showed that neither the distal motor latency, the median nerve CSA, nor the wrist-to-forearm-ratio could distinguish between patients with and without CTS symptoms. Diagnosis of CTS in diabetic patients should primarily be based upon typical clinical symptoms and signs. Results of electrodiagnostic testing and nerve ultrasound have to be interpreted with caution and additional factors have to be considered especially polyneuropathy, but also body mass index and hyperglycemia.
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Affiliation(s)
- Bianka Heiling
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (L.I.E.E.W.); (N.J.K.); (H.A.)
- Clinician Scientist Program OrganAge, Jena University Hospital, 07747 Jena, Germany
- Correspondence:
| | - Leonie I. E. E. Wiedfeld
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (L.I.E.E.W.); (N.J.K.); (H.A.)
| | - Nicolle Müller
- Department of Internal Medicine III, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (N.M.); (C.K.)
| | - Niklas J. Kobler
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (L.I.E.E.W.); (N.J.K.); (H.A.)
| | - Alexander Grimm
- Department of Neurology, Tuebingen University Hospital, 72076 Tuebingen, Germany;
| | - Christof Kloos
- Department of Internal Medicine III, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (N.M.); (C.K.)
| | - Hubertus Axer
- Department of Neurology, Jena University Hospital, Friedrich Schiller University, 07747 Jena, Germany; (L.I.E.E.W.); (N.J.K.); (H.A.)
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Use of Neuromuscular Ultrasound in the Diagnosis of Disulfiram Polyneuropathy. J Clin Neuromuscul Dis 2022; 23:201-204. [PMID: 35608643 DOI: 10.1097/cnd.0000000000000380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
ABSTRACT We present the case of a 37-year-old woman with alcohol use disorder, who developed leg cramping, bilateral foot drop, and hand weakness 3 months after starting disulfiram. This was accompanied by an 18-pound involuntary weight loss. Electrophysiologic findings showed a motor predominant axonal neuropathy. Neuromuscular ultrasound showed normal to small cross-sectional area of all nerves studied. This case is discussed, and the ultrasound findings are compared with another reported case.
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Bayat M, Bagheri Z, Raeissadat SA, Rayegani SM, Ahmadzadeh A, Shirani F. Diagnostic Value of Ultrasound for Detecting Carpal Tunnel Syndrome in Patients With Rheumatoid Arthritis: A Three-Arm Cross-Sectional Study. JOURNAL OF DIAGNOSTIC MEDICAL SONOGRAPHY 2022. [DOI: 10.1177/87564793221092982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Objective: This study was conducted to assess the diagnostic value of sonography in detecting carpal tunnel syndrome (CTS) in patients with rheumatoid arthritis (RA) and to compare the results with a normal control group. Materials and Methods: In this three-arm cross-sectional study, the sonographically measured median nerve cross-sectional area (MNCSA) was compared in three groups: RA patients with CTS, RA patients without CTS, and normal subjects (no RA, no CTS). A nerve conduction study (NCS) was performed for all enrolled participants, across the three study arms. Results: In this study, 38 RA patients (17 in CTS group and 21 in no CTS group) and 19 healthy subjects were recruited. The MNCSAs were 11.86 (±1.87) mm2 in RA patients with CTS, 10.16 (±1.71) mm2 in RA patients without CTS, and 9.42 (±1.46) mm² in healthy control patients. The accuracy of sonography in detecting CTS was 0.79 (95% confidence interval, 0.67–0.91), with a sensitivity and specificity of 88% and 57%, respectively. The MNCSA in CTS group was significantly higher than the control group ( P = .02). Conclusion: In this cohort, the sonographic measurement of MNCSA was an accurate and sensitive method for the diagnosis of CTS, especially in its early stages. In addition, in this cohort, RA without CTS did not increase the MNCSA.
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Affiliation(s)
- Masume Bayat
- Physical Medicine and Rehabilitation Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Physical Medicine and Rehabilitation Research Center, Tajrish Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Zohreh Bagheri
- Physical Medicine and Rehabilitation Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Ahmad Raeissadat
- Physical Medicine and Rehabilitation Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Seyed Mansoor Rayegani
- Physical Medicine and Rehabilitation Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Arman Ahmadzadeh
- Department of Rheumatology, Loghman Hakim Hospital, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fatemeh Shirani
- Physical Medicine and Rehabilitation Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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Kim BS, Yu M, Kim S, Yoon JS, Baek S. Scale-attentional U-Net for the segmentation of the median nerve in ultrasound images. Ultrasonography 2022; 41:706-717. [PMID: 35754116 PMCID: PMC9532202 DOI: 10.14366/usg.21214] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Accepted: 03/15/2022] [Indexed: 11/23/2022] Open
Abstract
Purpose The aim of this study was to develop a neural network that accurately and effectively segments the median nerve in ultrasound (US) images. Methods In total, 1,305 images of the median nerve of 123 normal subjects were used to train and evaluate the model. Four datasets from two measurement regions (wrist and forearm) of the nerve and two US machines were used. The neural network was designed for high accuracy by combining information at multiple scales, as well as for high efficiency to prevent overfitting. The model was designed in two parts (cascaded and factorized convolutions), followed by self-attention over scale and channel features. The precision, recall, dice similarity coefficient (DSC), and Hausdorff distance (HD) were used as performance metrics. The area under the receiver operating characteristic curve (AUC) was also assessed. Results In the wrist datasets, the proposed network achieved 92.7% and 90.3% precision, 92.4% and 89.8% recall, DSCs of 92.3% and 89.7%, HDs of 5.158 and 4.966, and AUCs of 0.9755 and 0.9399 on two machines. In the forearm datasets, 79.3% and 87.8% precision, 76.0% and 85.0% recall, DSCs of 76.1% and 85.8%, HDs of 5.206 and 4.527, and AUCs of 0.8846 and 0.9150 were achieved. In all datasets, the model developed herein achieved better performance in terms of DSC than previous U-Net-based systems. Conclusion The proposed neural network yields accurate segmentation results to assist clinicians in identifying the median nerve.
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Affiliation(s)
- Beom Suk Kim
- Department of Physical and Rehabilitation Medicine, Chung-Ang University College of Medicine, Seoul, Korea.,Department of Physical and Rehabilitation Medicine, Chung-Ang University Gwangmyeong Hospital, Gwangmyeong, Korea
| | - Minhyeong Yu
- Department of Computer Science and Engineering, Korea University, Seoul, Korea
| | - Sunwoo Kim
- Department of Computer Science and Engineering, Korea University, Seoul, Korea
| | - Joon Shik Yoon
- Department of Physical Medicine and Rehabilitation, Korea University Guro Hospital, Seoul, Korea
| | - Seungjun Baek
- Department of Computer Science and Engineering, Korea University, Seoul, Korea
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Goncu Ayhan S, Ayhan E, Çaglar AT, Sahin D. Ultrasonography for carpal tunnel syndrome in pregnancy: a prospective cross-sectional study. J OBSTET GYNAECOL 2022; 42:1769-1774. [PMID: 35260035 DOI: 10.1080/01443615.2022.2036970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
Confirmation of carpal tunnel syndrome (CTS) diagnosis with sonographic measurement of the median nerve cross sectional area (MN-CSA) is increasing in popularity. We aimed to analyse the ultrasonography (USG) values of MN-CSA in pregnant women with and without CTS symptoms. MN-CSAs of third trimester pregnant women were measured with USG and they were asked about the presence of CTS symptoms. Symptomatic participants were assigned to the CTS group and remaining participants were assigned to the Control group. The groups were compared according to MN-CSA. Twenty-five participants were grouped in CTS group and the remaining 64 participants were grouped in Control group. The MN-CSA was higher in the CTS group (9.44 ± 2.68) than in the Control group (7.20 ± 1.99), p = .00004. Obstetricians can use USG measurement of MN-CSA to confirm CTS diagnosis and consequently can offer conservative management, which is the widely accepted treatment modality in this cohort.Impact statementWhat is already known on this subject? CTS is the most common mononeuropathy of pregnancy, with up to 62% prevalence rates. The American Association of Neuromuscular & Electrodiagnostic Medicine practice guideline for the diagnosis of CTS recommends sonographic measurement of median nerve swelling at the carpal tunnel inlet as an accurate diagnostic test (Level A).What do the results of this study add? We found that a simple sonographic measurement of median nerve cross sectional area (MN-CSA) at the wrist appears to be a convenient method to confirm clinical CTS diagnosis in pregnant women. This study offers to use USG to confirm clinical CTS diagnosis in third trimester pregnant women before delivery.What are the implications of these findings for clinical practice and/or further research? This study will help to raise awareness of obstetricians about CTS during pregnancy. USG can be an effective first-line confirmatory test for CTS diagnosis in the pregnant population, but further research is necessary to determine a clear cut-off value for MN-CSA. We advise obstetricians to use sonographic measurement of MN-CSA in pregnant women with typical CTS symptoms, which will increase uniformity for consensus development. Obstetricians can offer advice for conservative management of CTS during pregnancy, which is the widely accepted treatment in this cohort.
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Affiliation(s)
- Sule Goncu Ayhan
- Department of Obstetrics and Gynecology, Perinatology Division, Turkish Ministry of Health Ankara City Hospital, Ankara, Turkey
| | - Egemen Ayhan
- Orthopedics and Traumatology, Hand Surgery Division, University of Health Sciences Turkey, Diskapi YB Training and Research Hospital, Ankara, Turkey
| | - Ali Turhan Çaglar
- Department of Obstetrics and Gynecology, Perinatology Division, Etlik Zubeyde Hanim Women's Health Care, Training and Research Hospital, University of Health Sciences Turkey, Ankara, Turkey
| | - Dilek Sahin
- Department of Obstetrics and Gynecology, Perinatology Division, Turkish Ministry of Health Ankara City Hospital, University of Health Sciences Turkey, Ankara, Turkey
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Smerilli G, Cipolletta E, Sartini G, Moscioni E, Di Cosmo M, Fiorentino MC, Moccia S, Frontoni E, Grassi W, Filippucci E. Development of a convolutional neural network for the identification and the measurement of the median nerve on ultrasound images acquired at carpal tunnel level. Arthritis Res Ther 2022; 24:38. [PMID: 35135598 PMCID: PMC8822696 DOI: 10.1186/s13075-022-02729-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2021] [Accepted: 01/21/2022] [Indexed: 12/28/2022] Open
Abstract
Background Deep learning applied to ultrasound (US) can provide a feedback to the sonographer about the correct identification of scanned tissues and allows for faster and standardized measurements. The most frequently adopted parameter for US diagnosis of carpal tunnel syndrome is the increasing of the cross-sectional area (CSA) of the median nerve. Our aim was to develop a deep learning algorithm, relying on convolutional neural networks (CNNs), for the localization and segmentation of the median nerve and the automatic measurement of its CSA on US images acquired at the proximal inlet of the carpal tunnel. Methods Consecutive patients with rheumatic and musculoskeletal disorders were recruited. Transverse US images were acquired at the carpal tunnel inlet, and the CSA was manually measured. Anatomical variants were registered. The dataset consisted of 246 images (157 for training, 40 for validation, and 49 for testing) from 103 patients each associated with manual annotations of the nerve boundary. A Mask R-CNN, state-of-the-art CNN for image semantic segmentation, was trained on this dataset to accurately localize and segment the median nerve section. To evaluate the performances on the testing set, precision (Prec), recall (Rec), mean average precision (mAP), and Dice similarity coefficient (DSC) were computed. A sub-analysis excluding anatomical variants was performed. The CSA was automatically measured by the algorithm. Results The algorithm correctly identified the median nerve in 41/49 images (83.7%) and in 41/43 images (95.3%) excluding anatomical variants. The following metrics were obtained (with and without anatomical variants, respectively): Prec 0.86 ± 0.33 and 0.96 ± 0.18, Rec 0.88 ± 0.33 and 0.98 ± 0.15, mAP 0.88 ± 0.33 and 0.98 ± 0.15, and DSC 0.86 ± 0.19 and 0.88 ± 0.19. The agreement between the algorithm and the sonographer CSA measurements was excellent [ICC 0.97 (0.94–0.98)]. Conclusions The developed algorithm has shown excellent performances, especially if excluding anatomical variants. Future research should aim at expanding the US image dataset including a wider spectrum of normal anatomy and pathology. This deep learning approach has shown very high potentiality for a fully automatic support for US assessment of carpal tunnel syndrome.
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Affiliation(s)
- Gianluca Smerilli
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy.
| | - Edoardo Cipolletta
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy
| | - Gianmarco Sartini
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy
| | - Erica Moscioni
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy
| | - Mariachiara Di Cosmo
- Department of Information Engineering, Polytechnic University of Marche, Ancona, Italy
| | | | - Sara Moccia
- The BioRobotics Institute and Department of Excellence in Robotics and AI, Scuola Superiore Sant'Anna, Pisa, Italy
| | - Emanuele Frontoni
- Department of Information Engineering, Polytechnic University of Marche, Ancona, Italy
| | - Walter Grassi
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy
| | - Emilio Filippucci
- Rheumatology Unit, Department of Clinical and Molecular Sciences, Polytechnic University of Marche, "Carlo Urbani" Hospital, Via Aldo Moro 25, 60035, Jesi, Ancona, Italy
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Hathaiareerug C, Somnam S, Kumnerddee W, Phongamwong C. Cross-sectional Area Ratio of Median-to-Ulnar and Median-to-Superficial Radial Nerve at the Wrist for Diagnosis of Carpal Tunnel Syndrome. Prog Rehabil Med 2022; 7:20220037. [PMID: 35935453 PMCID: PMC9301209 DOI: 10.2490/prm.20220037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 07/05/2022] [Indexed: 11/26/2022] Open
Abstract
Objectives: This study aimed to evaluate the diagnostic properties for carpal tunnel syndrome (CTS) of the median-to-ulnar cross-sectional area ratio (MUR) and the median-to-superficial radial cross-sectional area ratio (MRR). Methods: A case–control study was conducted. A physiatrist, blinded to the CTS status of the subjects, assessed the cross-sectional area of the median nerve (CSA-m), MUR, and MRR at the distal wrist crease for the CTS and control groups. The relationship of CSA-m, MUR, and MRR with CTS severity was tested using Spearman’s correlation. The overall diagnostic accuracy was determined using the area under the receiver operating characteristic curve (AUC). The cut-off values to diagnose CTS were chosen to achieve similar values for sensitivity and specificity. Results: There were 32 hands in the CTS group and 33 hands in the control group. The correlations of CSA-m, MUR, and MRR with CTS severity were 0.66, 0.56, and 0.34, respectively. The AUCs of CSA-m, MUR, and MRR were 0.86 (95%CI: 0.77–0.95), 0.79 (0.69–0.90), and 0.69 (0.56–0.82), respectively. The cut-off values of CSA-m, MUR, and MRR were 12 mm2 (sensitivity, 81.3%; specificity, 81.8%), 2.6 (sensitivity, 68.8%; specificity, 69.7%), and 10 (sensitivity, 65.6%; specificity, 63.6%), respectively. Conclusions : MUR and MRR had acceptable diagnostic abilities but did not show superiority over CSA-m for CTS diagnosis.
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Affiliation(s)
- Chanasak Hathaiareerug
- Department of Rehabilitation Medicine, Phramongkutklao Hospital and Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Suthida Somnam
- Department of Rehabilitation Medicine, Phramongkutklao Hospital and Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Wipoo Kumnerddee
- Department of Rehabilitation Medicine, Phramongkutklao Hospital and Phramongkutklao College of Medicine, Bangkok, Thailand
| | - Chanwit Phongamwong
- Department of Rehabilitation Medicine, Phramongkutklao Hospital and Phramongkutklao College of Medicine, Bangkok, Thailand
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Expert consensus on the combined investigation of carpal tunnel syndrome with electrodiagnostic tests and neuromuscular ultrasound. Clin Neurophysiol 2022; 135:107-116. [DOI: 10.1016/j.clinph.2021.12.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2021] [Revised: 12/18/2021] [Accepted: 12/29/2021] [Indexed: 12/13/2022]
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Jorgensen SP, Cartwright MS, Norbury J. Neuromuscular Ultrasound: Indications in the Electrodiagnostic Laboratory. Am J Phys Med Rehabil 2022; 101:78-88. [PMID: 33990480 DOI: 10.1097/phm.0000000000001790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
ABSTRACT Accurate assessment of neuromuscular disorders is critical to facilitate timely treatment and achieve the best outcomes. Historically, electrodiagnostic studies have filled this role, but recently, neuromuscular ultrasound is being used in the electrodiagnostic laboratory. This review discusses the uses of neuromuscular ultrasound in the electrodiagnostic laboratory that have strong evidence, emphasizing those that could be adopted in a typical electrodiagnostic laboratory with a reasonable level of equipment and training. The evidence currently supports using neuromuscular ultrasound to diagnose carpal tunnel syndrome and ulnar neuropathies at the elbow and as a supplementary test when electrodiagnostic studies are suspected to be falsely negative or in axonal nonlocalizing lesions. Neuromuscular ultrasound can identify the causes of focal mononeuropathies, which can change treatment in specific cases. It is sensitive at identifying fasciculations and providing complementary evidence of autoimmune demyelinating polyneuropathies. It is particularly helpful in assessing nerves after trauma. Neuromuscular ultrasound is likely to prove even more useful in the electrodiagnostic laboratory as the technology continues to advance.
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Affiliation(s)
- Shawn P Jorgensen
- From the Department of Physical Medicine and Rehabilitation, Albany Medical College, Albany, New York (SPJ); Department of Family Medicine, Larner Medical College at the University of Vermont, Burlington, Vermont (SPJ); Adirondack Rehabilitation Medicine, PLLC, Queensbury, New York (SPJ); Department of Neurology, Wake Forest University School of Medicine, Winston-Salem, North Carolina (MSC); and Division of Physical Medicine and Rehabilitation, Department of Neurology, Texas Tech University Health Sciences Center, Lubbock, Texas (JN)
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Shook SJ, Ginsberg M, Narayanaswami P, Beekman R, Dubin AH, Katirji B, Swaminathan B, Werner RA, Cartwright MS. Evidence-based guideline: Neuromuscular ultrasound for the diagnosis of ulnar neuropathy at the elbow. Muscle Nerve 2021; 65:147-153. [PMID: 34921428 DOI: 10.1002/mus.27460] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2021] [Accepted: 11/09/2021] [Indexed: 11/08/2022]
Abstract
INTRODUCTION/AIMS The purpose of this literature review is to develop an evidence-based guideline for the use of neuromuscular ultrasound in the diagnosis of ulnar neuropathy at the elbow (UNE). The proposed research question was: "In patients with suspected UNE, does ulnar nerve enlargement as measured with ultrasound accurately identify those patients with UNE?" METHODS A systematic review and meta-analysis was performed, and studies were classified according to American Academy of Neurology criteria for rating articles for diagnostic accuracy. RESULTS Based on Class I evidence in four studies, it is probable that neuromuscular ultrasound measurement of the ulnar nerve at the elbow, either of diameter or cross-sectional area (CSA), is accurate for the diagnosis of UNE. RECOMMENDATION For patients with symptoms and signs suggestive of ulnar neuropathy, clinicians should offer ultrasonographic measurement of ulnar nerve cross-sectional area or diameter to confirm the diagnosis and localize the site of compression (Level B).
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Affiliation(s)
- Steven J Shook
- American Association of Neuromuscular & Electrodiagnostic Medicine, Rochester, Minnesota, USA.,Department of Neurology, Neuromuscular Center, Cleveland Clinic, Cleveland, Ohio, USA
| | - Matthew Ginsberg
- Department of Neurology, Akron Children's Hospital, Akron, Ohio, USA
| | - Pushpa Narayanaswami
- Department of Neurology, Neuromuscular Division, Beth Israel Deaconess Medical Center, Boston, Ohio, USA
| | - Roy Beekman
- Department of Neurology, Zuyderland Medisch Centrum, Sittard-Geleen, The Netherlands
| | - Andrew H Dubin
- Department of Physical Medicine & Rehabilitation, University of Florida, Gainesville, Florida, USA
| | - Bashar Katirji
- Neurological Institute, University Hospitals, Cleveland Medical Center, Case Western Reserve University, Cleveland, Ohio, USA
| | - Bharathi Swaminathan
- Department of Physical Medicine and Rehabilitation, Chicago Medical School, North Chicago, Illinois, USA
| | - Robert A Werner
- Michigan Medicine, Ann Arbor VA Health System, Ann Arbor, Michigan, USA
| | - Michael S Cartwright
- Department of Neurology, Wake Forest School of Medicine, Winston-Salem, North Carolina, USA
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Sung JH, Kwon YJ, Baek SH, Son MH, Lee JH, Kim BJ. Utility of shear wave elastography and high-definition color for diagnosing carpal tunnel syndrome. Clin Neurophysiol 2021; 135:179-187. [PMID: 34963555 DOI: 10.1016/j.clinph.2021.10.020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 10/11/2021] [Accepted: 10/14/2021] [Indexed: 02/07/2023]
Abstract
OBJECTIVE The diagnostic values of measuring median nerve (MN) stiffness and vascularity with shear wave elastography (SWE) and high-definition (HD) color were investigated in carpal tunnel syndrome (CTS). METHODS Seventy patients (123 wrists) with CTS and thirty-five healthy volunteers (70 wrists) were enrolled. Based on nerve conduction studies (NCS), the patients were subdivided into NCS-negative, mild-to-moderate, and severe CTS groups. MN and abductor pollicis brevis (APB) SWE and MN HD color were performed on a longitudinal plane. RESULTS The mild-to-moderate and severe CTS groups showed increased MN stiffness at the wrist and MN stiffness ratio (wrist-to forearm) compared with the control (p < 0.001). The NCS-negative CTS group showed increased MN stiffness at the wrist (p = 0.022) and MN stiffness ratio (p = 0.032) compared with the control. The severe CTS group showed increased MN stiffness at the wrist compared with the mild-to-moderate CTS group (p = 0.034). The cutoff-values in diagnosing NCS-confirmed CTS were 50.12 kPa for MN stiffness at the wrist, 1.91 for MN stiffness ratio, and grade 1 for HD color. CONCLUSIONS SWE and HD color are good supportive tools in diagnosing and assessing severity in CTS. SIGNIFICANCE SWE and HD color demonstrated that MN in CTS was associated with increased stiffness and hypervascularity.
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Affiliation(s)
- Joo Hye Sung
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Ye Ji Kwon
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Seol-Hee Baek
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea.
| | - Myeong Hun Son
- Neurophysiology Laboratory, Korea University Anam Hospital, Seoul, Republic of Korea.
| | - Jung Hun Lee
- Neurophysiology Laboratory, Korea University Anam Hospital, Seoul, Republic of Korea.
| | - Byung-Jo Kim
- Department of Neurology, Korea University Anam Hospital, Korea University College of Medicine, Seoul, Republic of Korea; BK21 FOUR Program in Learning Health Systems, Korea University, Seoul, Korea.
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