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Martín-Palomeque G, Cabañes-Martínez L, López JR, Mateo Montero RC, Reyes A, Gandarias C, Regidor I. Usefulness of the H-Reflex for Intraoperative Monitoring of Thoracoabdominal Aneurysms. J Clin Neurophysiol 2024; 41:542-548. [PMID: 37255237 DOI: 10.1097/wnp.0000000000001016] [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: 06/01/2023] Open
Abstract
PURPOSE Intraoperative neurophysiologic monitoring in thoracoabdominal aneurysms (TAAA) is essential to avoid intraoperative spinal cord injury). Motor and somatosensory evoked potentials may be considered intraoperative tools for detecting spinal cord injury. H-reflex is a well-known neurophysiologic technique to evaluate L5-S1 root. Current evidence supports the observation that H-reflex changes may occur with spinal cord damage as high as the cervical level. This study aimed to evaluate the usefulness of the H-reflex in these surgeries. METHODS The use of intraoperative H-reflex in TAAA monitoring was evaluated in 12 patients undergoing open or endovascular repair of TAAA for a period of four years (2016-2020) using somatosensory evoked potentials (SSEPs) and transcranial motor evoked potentials (TcMEPs) and bilateral H-reflex. RESULTS Six neurophysiologic alarms were recorded in five of the 12 patients. Summarizing the neurophysiologic changes of our series, we considered a peripheral change when we detected a unilateral loss of SSEPs, TcMEPs, and H-reflex. Instead, we assumed a central change when we detected a unilateral or bilateral loss of TcMEPs and H-reflex with normal SSEPs, which we considered a sign of spinal cord ischemia. Interestingly H-reflex always changed significantly in combination with TcMEPs in the same fashion. CONCLUSIONS According to our series, H-reflex can detect intraoperative changes with the same sensitivity as TcMEPs in TAAA surgeries. With the support of other techniques, it can be useful to localize the origin of the lesion (peripheral or central spinal cord), to help in surgical decision-making to avoid postoperative neurologic damage. Based on our results, we recommend the systematic use of H-reflex in TAAA surgeries.
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Affiliation(s)
| | | | - Jaime R López
- Departments of Neurology and Neurological Sciences and Neurosurgery, Stanford University School of Medicine, Stanford, California, U.S.A.; and
| | | | - Andrés Reyes
- Department of Vascular and Endovascular Surgery, Hospital Ramón y Cajal, Madrid, Spain
| | - Claudio Gandarias
- Department of Vascular and Endovascular Surgery, Hospital Ramón y Cajal, Madrid, Spain
| | - Ignacio Regidor
- Department of Clinical Neurophysiology, Hospital Ramón y Cajal, Madrid, Spain
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Ando M, Kise Y, Kuniyoshi Y, Higa S, Nagano T, Furukawa K. Usefulness of Motor Evoked Potential Measurement and Analysis of Risk Factors for Spinal Cord Ischaemia from 300 Cases of Thoracic Endovascular Aortic Repair. Eur J Vasc Endovasc Surg 2024; 68:171-179. [PMID: 38499146 DOI: 10.1016/j.ejvs.2024.03.014] [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: 07/12/2023] [Revised: 02/22/2024] [Accepted: 03/15/2024] [Indexed: 03/20/2024]
Abstract
OBJECTIVE This study investigated the usefulness of motor evoked potentials (MEPs) for intra-operative monitoring to detect the risk of spinal cord ischaemia (SCI) during thoracic endovascular aortic repair (TEVAR). Risk factors for SCI in TEVAR were also analysed. METHODS Among 330 TEVARs performed from February 2009 to October 2018, 300 patients underwent intra-operative MEP monitoring. SCI risk groups were extracted based on MEP amplitude changes using a cutoff value of 50%. When the amplitude decreased to < 50% of the pre-operative value, intra-operative mean arterial pressure (MAP) was increased by about 20 mmHg using noradrenaline, whereas MAP was usually controlled to about 80 mmHg during surgery. Other efforts were also made to increase MEP amplitude by increasing cardiac output, correcting anaemia, and finishing the surgery promptly. Based on MEP amplitude data, SCI risk groups were extracted and risk factors for SCI in TEVAR were analysed. RESULTS A total of 283 non-SCI risk patients and 17 SCI risk patients by MEP monitoring were extracted; only 1.0% developed immediate paraplegia and none developed delayed paraplegia. Bivariable analysis showed significant differences in chronic kidney disease, haemodialysis, artery of Adamkiewicz closure, and stent graft (SG) covered length ≥ 8 vertebral bodies. Logistic regression analysis showed hyperlipidaemia (odds ratio [OR] 3.55, 95% confidence interval [CI] 1.08 - 11.67; p = .037), SG covered length ≥ 8 vertebral bodies (OR 1.35, 95% CI 1.02 - 1.78; p = .034), and haemodialysis (OR 27.78, 95% CI 6.02 - 128.22; p < .001) were the most influential risk factors for SCI in TEVAR. CONCLUSION MEPs might be a useful monitoring tool to predict SCI in TEVAR. In addition, hyperlipidaemia, SG covered length ≥ 8 vertebral bodies, and haemodialysis represent key risk factors for SCI during TEVAR.
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Affiliation(s)
- Mizuki Ando
- Department of Thoracic and Cardiovascular Surgery, University of the Ryukyus, Nishihara, Okinawa, Japan.
| | - Yuya Kise
- Department of Thoracic and Cardiovascular Surgery, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Yukio Kuniyoshi
- Department of Cardiovascular Surgery, Urasoe General Hospital, Urasoe, Okinawa, Japan
| | - Shotaro Higa
- Department of Thoracic and Cardiovascular Surgery, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Takaaki Nagano
- Department of Thoracic and Cardiovascular Surgery, University of the Ryukyus, Nishihara, Okinawa, Japan
| | - Kojiro Furukawa
- Department of Thoracic and Cardiovascular Surgery, University of the Ryukyus, Nishihara, Okinawa, Japan
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Toleikis JR, Pace C, Jahangiri FR, Hemmer LB, Toleikis SC. Intraoperative somatosensory evoked potential (SEP) monitoring: an updated position statement by the American Society of Neurophysiological Monitoring. J Clin Monit Comput 2024:10.1007/s10877-024-01201-x. [PMID: 39068294 DOI: 10.1007/s10877-024-01201-x] [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: 07/05/2024] [Accepted: 07/16/2024] [Indexed: 07/30/2024]
Abstract
Somatosensory evoked potentials (SEPs) are used to assess the functional status of somatosensory pathways during surgical procedures and can help protect patients' neurological integrity intraoperatively. This is a position statement on intraoperative SEP monitoring from the American Society of Neurophysiological Monitoring (ASNM) and updates prior ASNM position statements on SEPs from the years 2005 and 2010. This position statement is endorsed by ASNM and serves as an educational service to the neurophysiological community on the recommended use of SEPs as a neurophysiological monitoring tool. It presents the rationale for SEP utilization and its clinical applications. It also covers the relevant anatomy, technical methodology for setup and signal acquisition, signal interpretation, anesthesia and physiological considerations, and documentation and credentialing requirements to optimize SEP monitoring to aid in protecting the nervous system during surgery.
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Affiliation(s)
| | | | - Faisal R Jahangiri
- Global Innervation LLC, Dallas, TX, USA
- Department of Neuroscience, School of Behavioral and Brain Sciences, University of Texas at Dallas, Richardson, TX, USA
| | - Laura B Hemmer
- Anesthesiology and Neurological Surgery, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
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Thet MS, D'Oria M, Sef D, Klokocovnik T, Oo AY, Lepidi S. Neuromonitoring during Endovascular Thoracoabdominal Aortic Aneurysm Repair: A Systematic Review. Ann Vasc Surg 2024; 109:206-215. [PMID: 39009132 DOI: 10.1016/j.avsg.2024.06.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2024] [Revised: 06/06/2024] [Accepted: 06/10/2024] [Indexed: 07/17/2024]
Abstract
BACKGROUND Spinal cord ischemia (SCI) is a potentially devastating complication of thoracic endovascular aortic repair (TEVAR) and fenestrated-branched endovascular aortic repair (F-BEVAR). The aim of this systematic review was to evaluate the efficacy of neuromonitoring modalities to mitigate the risk of SCI during TEVAR and F-BEVAR procedures. METHODS Following the PRISMA guidelines, we conducted a detailed literature search of databases including PubMed, MEDLINE via Ovid, Embase, Scopus, and Cochrane CENTRAL, from 1998 to the present. Inclusion criteria were original research articles examining neuromonitoring during TEVAR and F-BEVAR. The primary outcome was the incidence of SCI, while the secondary outcome included early mortality. The quality of studies was assessed using the Newcastle-Ottawa Scale. RESULTS From 1,450 identified articles, 11 met inclusion criteria, encompassing data from 1,069 patients. Neuromonitoring modalities included motor-evoked potentials (MEPs), somatosensory evoked potentials (SSEPs), and near-infrared spectroscopy. The combination of MEPs and SSEPs was most commonly used, with 93% sensitivity and 96% specificity for detecting SCI risks. SCI incidence ranged from 3.8 to 17.3%, with permanent deficits occurring in 2.7-5.8% of cases. In-hospital mortality ranged from 0.4 to 8%. Risk factors for SCI were identified, including operation duration and extent of aortic coverage. CONCLUSIONS Neuromonitoring with MEPs and SSEPs appears to be effective in detecting perioperative SCI risk during TEVAR and F-BEVAR. However, discrepancies between neuromonitoring changes and actual SCI outcomes suggest the need for cautious interpretation. While the incidence of SCI remains variable, identified risk factors may guide clinical decisions, particularly in high-risk procedures. Future research should focus on prospective studies and randomized controlled trials to validate these findings and improve SCI prevention strategies in TEVAR and F-BEVAR.
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Affiliation(s)
- Myat Soe Thet
- Department of Surgery and Cancer, Imperial College London, UK
| | - Mario D'Oria
- Division of Vascular and Endovascular Surgery, Department of Clinical Surgical and Health Sciences, University of Trieste, Italy.
| | - Davorin Sef
- Wessex Cardiothoracic Centre, University Hospital Southampton, Southampton, UK
| | | | - Aung Ye Oo
- Department of Cardiothoracic Surgery, St Bartholomew's Hospital, London, UK
| | - Sandro Lepidi
- Division of Vascular and Endovascular Surgery, Department of Clinical Surgical and Health Sciences, University of Trieste, Italy
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Sultan I, Brown JA, Serna-Gallegos D, Thirumala PD, Balzer JR, Paras S, Fleseriu C, Crammond DJ, Anetakis KM, Kilic A, Navid F, Gleason TG. Intraoperative neurophysiologic monitoring during aortic arch surgery. J Thorac Cardiovasc Surg 2021; 165:1971-1981.e2. [PMID: 34384591 DOI: 10.1016/j.jtcvs.2021.07.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 06/16/2021] [Accepted: 07/09/2021] [Indexed: 12/01/2022]
Abstract
OBJECTIVE To evaluate the ability of intraoperative neurophysiologic monitoring (IONM) during aortic arch reconstruction with hypothermic circulatory arrest (HCA) to predict early (<48 hours) adverse neurologic events (ANE; stroke or transient ischemic attack) and operative mortality. METHODS This was an observational study of aortic arch surgeries requiring HCA from 2010 to 2018. Patients were monitored with electroencephalogram (EEG) and somatosensory evoked potentials (SSEP). Baseline characteristics and postoperative outcomes were compared according to presence or absence of IONM changes, which were defined as any acute variation in SSEP or EEG, compared with baseline. Multivariable logistic regression analysis was used to assess the association of IONM changes with operative mortality and early ANE. RESULTS A total of 563 patients underwent aortic arch reconstruction with HCA and IONM. Of these, 119 (21.1%) patients had an IONM change, whereas 444 (78.9%) did not. Patients with IONM changes had increased operative mortality (22.7% vs 4.3%) and increased early ANE (10.9% vs 2.9%). In multivariable analysis, SSEP changes were correlated with early ANE (odds ratio [OR], 4.68; 95% confidence interval [CI], 1.51-14.56; P = .008), whereas EEG changes were not (P = .532). Permanent SSEP changes were correlated with early ANE (OR, 4.56; 95% CI, 1.51-13.77; P = .007), whereas temperature-related SSEP changes were not (P = .997). Finally, any IONM change (either SSEP or EEG) was correlated with operative mortality (OR, 5.82; 95% CI, 2.72-12.49; P < .001). CONCLUSIONS Abnormal IONM events during aortic arch reconstruction with HCA portend worse neurologic outcomes and operative mortality and have a negative predictive value of 97.1%. SSEP might be more sensitive than EEG for predicting early ANE, especially when SSEP changes are permanent.
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Affiliation(s)
- Ibrahim Sultan
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa.
| | - James A Brown
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Derek Serna-Gallegos
- Division of Cardiac Surgery, Department of Cardiothoracic Surgery, University of Pittsburgh, Pittsburgh, Pa; Heart and Vascular Institute, University of Pittsburgh Medical Center, Pittsburgh, Pa
| | | | - Jeffrey R Balzer
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Stephanie Paras
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Cara Fleseriu
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pa
| | - Donald J Crammond
- Department of Neurological Surgery, University of Pittsburgh, Pittsburgh, Pa
| | | | - Arman Kilic
- Division of Cardiothoracic Surgery, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Forozan Navid
- Division of Cardiothoracic Surgery, Department of Surgery, Medical University of South Carolina, Charleston, SC
| | - Thomas G Gleason
- Division of Cardiac Surgery, Department of Surgery, University of Maryland, College Park, Md
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Utility of neuromonitoring in hypothermic circulatory arrest cases for early detection of stroke: Listening through the noise. J Thorac Cardiovasc Surg 2020; 162:1035-1045.e5. [PMID: 32204911 DOI: 10.1016/j.jtcvs.2020.01.090] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 12/30/2019] [Accepted: 01/04/2020] [Indexed: 12/19/2022]
Abstract
OBJECTIVE Stroke remains a potentially devastating complication of aortic arch intervention. The value of neurophysiologic intraoperative monitoring (NIOM) in the early identification of stroke is unclear. We evaluated the utility of NIOM for early stroke detection in aortic arch surgery. METHODS Across 8 years at our institution, 365 patients underwent aortic arch surgery with hypothermic circulatory arrest, and 224 cases utilized NIOM. One patient was excluded for intraoperative death. In the remaining cohort, we reviewed the incidence, timing, and location of strokes, and the incidence and nature of NIOM alerts. RESULTS Hemiarch was performed in 154 patients and total arch replacement in 69 patients. Stroke occurred in 6.3% of all cases (14 out of 223), 15.9% of total arches (11 out of 69), and 2.0% of hemiarches (3 out of 154). There were 33 NIOM alerts (14.8%), and 9 patients had both alerts and stroke. Of these, NIOM deficits plausibly correlated with imaging findings in 7 cases (78%). Of the 5 stroke patients without NIOM alerts, 2 developed neurologic symptoms 3 days or more postoperatively, and infarcts in 3 patients did not result in sensory or motor deficits. Excluding 2 patients with late stroke, the sensitivity of NIOM for stroke detection was 75%, specificity was 88.5%, positive predictive value was 27.3%, and negative predictive value was 97.4%. CONCLUSIONS Despite a low positive predictive value requiring a high level of discrimination when interpreting abnormal findings, NIOM has high sensitivity and specificity for the early stroke detection. Furthermore, its high negative predictive valve is reassuring for low risk of stroke in the absence of alerts.
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Tadros RO, Tang GH, Barnes HJ, Mousavi I, Kovacic JC, Faries P, Olin JW, Marin ML, Adams DH. Optimal Treatment of Uncomplicated Type B Aortic Dissection. J Am Coll Cardiol 2019; 74:1494-1504. [DOI: 10.1016/j.jacc.2019.07.063] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Accepted: 07/26/2019] [Indexed: 01/16/2023]
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Godet G, Bertrand M, Fléron MH, Goarin JP, Colson P, Cardon A, Koskas F, Verhoye JP, Kieffer E. Cerebrospinal fluid drainage and thoracic endovascular aneurysm repair. Asian Cardiovasc Thorac Ann 2017; 25:608-617. [DOI: 10.1177/0218492317739472] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Spinal cord complications including paraplegia and partial neurologic deficits remain a frequent problem during repair of descending thoracic or thoracoabdominal aortic aneurysms. Effective prevention of this dreaded complication is of paramount importance. Among the many adjuncts that have been proposed to prevent spinal cord complications, spinal fluid drainage is one that has been used by numerous teams. The aim of this review is to answer the following question: does spinal fluid drainage afford spinal cord protection during both open and endovascular repair of thoracic or thoracoabdominal aortic aneurysms?
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Affiliation(s)
- Gilles Godet
- Department of Anesthesiology and Intensive Care, and Vascular Surgery Unit, Pontchaillou University Hospital, Rennes, France
| | - Michèle Bertrand
- Department of Anesthesiology and Intensive Care, and Vascular Surgery Unit, Pitié Salpétrière University Hospital, Paris, France
| | - Marie-Hélène Fléron
- Department of Anesthesiology and Intensive Care, and Vascular Surgery Unit, Pitié Salpétrière University Hospital, Paris, France
| | - Jean-Pierre Goarin
- Department of Anesthesiology and Intensive Care, and Vascular Surgery Unit, Pitié Salpétrière University Hospital, Paris, France
| | - Pascal Colson
- Department of Anesthesiology and Intensive Care, Arnaud de Villeneuve University Hospital, Montpellier, France
| | - Alain Cardon
- Department of Cardiovascular and Thoracic Surgery, Pontchaillou University Hospital, Rennes, France
| | - Fabien Koskas
- Department of Vascular Surgery, Pitié Salpétrière University Hospital, Paris, France
| | - Jean-Philippe Verhoye
- Department of Cardiovascular and Thoracic Surgery, Pontchaillou University Hospital, Rennes, France
| | - Edouard Kieffer
- Department of Vascular Surgery, Pitié Salpétrière University Hospital, Paris, France
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Sueda T, Takahashi S. Spinal cord injury as a complication of thoracic endovascular aneurysm repair. Surg Today 2017; 48:473-477. [PMID: 28921013 DOI: 10.1007/s00595-017-1588-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Accepted: 07/17/2017] [Indexed: 10/18/2022]
Abstract
OBJECTIVE Spinal cord ischemia (SCI) is a devastating complication of thoracic aortic aneurysm repair in the era of thoracic endovascular aneurysm repair (TEVAR). This review aims to clarify the causes of SCI during TEVAR and to propose ways that it may be prevented. METHODS AND RESULTS We performed an extensive literature search of SCI during TEVAR. Based on the existing literature, we examined the anatomy of the anterior spinal cord artery, which supplies blood to the anterior aspect of the spinal cord, and discuss reported effective ways to prevent SCI during TEVAR, including augmentation of arterial blood pressure and drainage of cerebrospinal fluid. CONCLUSION After reviewing the mechanism of SCI during TEVAR, we evaluated promising preventative measures.
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Affiliation(s)
- Taijiro Sueda
- Department of Cardiovascular Surgery, Graduate School of Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan.
| | - Shinya Takahashi
- Department of Cardiovascular Surgery, Graduate School of Medicine, Hiroshima University, 1-2-3, Kasumi, Minami-ku, Hiroshima, 734-8551, Japan
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Crawford TC, Beaulieu RJ, Ehlert BA, Ratchford EV, Black JH. Malperfusion syndromes in aortic dissections. Vasc Med 2016; 21:264-73. [PMID: 26858183 DOI: 10.1177/1358863x15625371] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Aortic dissection remains a challenging clinical scenario, especially when complicated by peripheral malperfusion. Improvements in medical imaging have furthered understanding of the pathophysiology of malperfusion events in association with aortic dissection, including the elucidation of different mechanisms of branch vessel obstruction. Despite these advances, malperfusion syndrome remains a deadly entity with significant mortality. This review presents the latest knowledge regarding the pathogenesis of aortic dissection complicated by malperfusion syndrome, and discusses the diagnostic and therapeutic guidelines for management of this vicious entity.
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Affiliation(s)
- Todd C Crawford
- Johns Hopkins Hospital, Department of Surgery, Baltimore, MD, USA
| | | | - Bryan A Ehlert
- Johns Hopkins Hospital, Department of Surgery, Baltimore, MD, USA
| | | | - James H Black
- Johns Hopkins Hospital, Department of Surgery, Baltimore, MD, USA
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So V, Poon C. Intraoperative neuromonitoring in major vascular surgery. Br J Anaesth 2016; 117 Suppl 2:ii13-ii25. [DOI: 10.1093/bja/aew218] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/04/2016] [Indexed: 11/14/2022] Open
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The Effect of Perioperative Ischemia and Reperfusion on Multiorgan Dysfunction following Abdominal Aortic Aneurysm Repair. BIOMED RESEARCH INTERNATIONAL 2015; 2015:598980. [PMID: 26798637 PMCID: PMC4698535 DOI: 10.1155/2015/598980] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 08/30/2015] [Accepted: 09/07/2015] [Indexed: 12/03/2022]
Abstract
Abdominal aortic aneurysms (AAAs) are relatively common and are potentially life-threatening medical problems. The aim of this review is to provide an overview of the effect of I/R injury on multiorgan failure following AAA repair. The PubMed, CINAHL, EMBASE, Medline, Cochrane Review, and Scopus databases were comprehensively searched for articles concerning the pathophysiology of I/R and its systemic effects. Cross-referencing was performed using the bibliographies from the articles obtained. Articles retrieved were restricted to those published in English. One of the most prominent characteristics of AAA open repair is the double physiological phenomenon of ischemia-reperfusion (I/R) that happens either at the time of clamping or following the aortic clamp removal. Ischemia-reperfusion injury causes significant pathophysiological disturbances to distant organs, increasing the possibility for postoperative multiorgan failure. Although tissue injury is mediated by diverse mechanisms, microvascular dysfunction seems to be the final outcome of I/R.
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Etz CD, Weigang E, Hartert M, Lonn L, Mestres CA, Di Bartolomeo R, Bachet JE, Carrel TP, Grabenwöger M, Schepens MA, Czerny M. Contemporary spinal cord protection during thoracic and thoracoabdominal aortic surgery and endovascular aortic repair: a position paper of the vascular domain of the European Association for Cardio-Thoracic Surgery†. Eur J Cardiothorac Surg 2015; 47:943-57. [DOI: 10.1093/ejcts/ezv142] [Citation(s) in RCA: 173] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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14
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Panthee N, Ono M. Spinal cord injury following thoracic and thoracoabdominal aortic repairs. Asian Cardiovasc Thorac Ann 2015; 23:235-246. [DOI: 10.1177/0218492314548901] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/30/2023]
Abstract
Objective To discuss the currently available approaches to prevent spinal cord injury during thoracic and thoracoabdominal aortic repairs. Methods We carried out a PubMed search up to 2013 using the Medical Subject Headings: “aortic aneurysm/surgery” and “spinal cord ischemia”; “aortic aneurysm, thoracic/surgery” and “spinal cord ischemia”; “aneurysm/surgery” and “spinal cord ischemia/cerebrospinal fluid”; “aortic aneurysm/surgery” and “paraplegia”. All 190 original articles satisfying our inclusion criteria were analyzed for incidence, predictors, and other pertinent variables related to spinal cord injury, and we compared the results in recent publications with those in earlier reports. Results The mean age of the 38,491 patients was 65.3 ± 4.9 years. The overall incidence of paraplegia and/or paraparesis was 7.1% ± 6.1% (range 0%–32%). The incidence of spinal cord injury before 2000, from 2001 to 2007, and 2008–2013 was 9.0% ± 6.7%, 7.0% ± 6.1%, and 5.9% ± 5.2%, respectively ( p = 0.019). Various predictors of spinal cord injury were identified, extent of disease being the most common. Modification of surgical techniques, use of adjuncts, and better understanding of spinal cord perfusion physiology were attributed to the decrease in postoperative spinal cord injury in recent years. Conclusions Spinal cord injury after thoracic and thoracoabdominal aortic repair poses a real challenge to cardiovascular surgeons. However, with evolving surgical strategies, identification of predictors, and use of various adjuncts over the years, the incidence of spinal cord injury after thoracic/thoracoabdominal aortic repair has declined. Embracing a multimodality approach offers a good insight into combating this grave complication.
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Affiliation(s)
- Nirmal Panthee
- Department of Cardiac Surgery, University of Tokyo, Tokyo, Japan
| | - Minoru Ono
- Department of Cardiac Surgery, University of Tokyo, Tokyo, Japan
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Directly measuring spinal cord blood flow and spinal cord perfusion pressure via the collateral network: Correlations with changes in systemic blood pressure. J Thorac Cardiovasc Surg 2015; 149:360-6. [DOI: 10.1016/j.jtcvs.2014.09.121] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Revised: 09/11/2014] [Accepted: 09/14/2014] [Indexed: 11/22/2022]
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Hayatsu Y, Kawamoto S, Matsunaga T, Haga Y, Saiki Y. Real-time monitoring of spinal cord blood flow with a novel sensor mounted on a cerebrospinal fluid drainage catheter in an animal model. J Thorac Cardiovasc Surg 2014; 148:1726-31. [DOI: 10.1016/j.jtcvs.2014.04.011] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/24/2013] [Revised: 03/28/2014] [Accepted: 04/04/2014] [Indexed: 11/30/2022]
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17
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Sloan TB, Edmonds HL, Koht A. Intraoperative Electrophysiologic Monitoring in Aortic Surgery. J Cardiothorac Vasc Anesth 2013; 27:1364-73. [DOI: 10.1053/j.jvca.2012.09.027] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Indexed: 11/11/2022]
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18
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Gupta D. Regarding "Low incidence of paraplegia after thoracic endovascular aneurysm repair with proactive spinal cord protective protocols". J Vasc Surg 2013; 58:858. [PMID: 23972252 DOI: 10.1016/j.jvs.2013.04.060] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2013] [Revised: 04/16/2013] [Accepted: 04/17/2013] [Indexed: 10/26/2022]
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Abstract
During the last 30 years intraoperative electrophysiological monitoring (IOEM) has gained increasing importance in monitoring the function of neuronal structures and the intraoperative detection of impending new neurological deficits. The use of IOEM could reduce the incidence of postoperative neurological deficits after various surgical procedures. Motor evoked potentials (MEP) seem to be superior to other methods for many indications regarding monitoring of the central nervous system. During the application of IOEM general anesthesia should be provided by total intravenous anesthesia with propofol with an emphasis on a continuous high opioid dosage. When intraoperative MEP or electromyography guidance is planned, muscle relaxation must be either completely omitted or maintained in a titrated dose range in a steady state. The IOEM can be performed by surgeons, neurologists and neurophysiologists or increasingly more by anesthesiologists. However, to guarantee a safe application and interpretation, sufficient knowledge of the effects of the surgical procedure and pharmacological and physiological influences on the neurophysiological findings are indispensable.
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20
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McDonnell CO, Haider SN, Colgan MP, Shanik GD, Moore DJ, Madhavan P. Endovascular management of thoracic aortic pathology. Surgeon 2009; 7:24-30. [PMID: 19241982 DOI: 10.1016/s1479-666x(09)80063-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
BACKGROUND Endovascular technology has revolutionised the management of abdominal aortic aneurysmal disease but the less frequent occurrence of pathology in the thoracic aorta has meant that evidence demonstrating the primacy of endovascular treatment strategies in this portion of the vessel is less convincing. Herein we summarise the best available evidence to date. METHODS A comprehensive search of the surgical and radiological literature using the search term 'endovascular thoracic aorta' was conducted. FINDINGS AND CONCLUSIONS The vast majority of patients treated by thoracic aortic stent grafting have had their treatment outside the context of a randomised trial. While it would seem that endovascular repair is the treatment of choice for the thoracic aorta, the present evidence is based on single centre case series and is anecdotal at best.
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Affiliation(s)
- C O McDonnell
- Department ofVascular Surgery, Mater Misericordiae University Hospital, Dublin, Ireland.
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21
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Greenberg RK, Lu Q, Roselli EE, Svensson LG, Moon MC, Hernandez AV, Dowdall J, Cury M, Francis C, Pfaff K, Clair DG, Ouriel K, Lytle BW. Contemporary Analysis of Descending Thoracic and Thoracoabdominal Aneurysm Repair. Circulation 2008; 118:808-17. [DOI: 10.1161/circulationaha.108.769695] [Citation(s) in RCA: 421] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Background—
Endovascular repair of thoracic aneurysm has demonstrated low risks of mortality and spinal cord ischemia (SCI), but few large series have been published on endovascular thoracoabdominal aneurysm repair, and reports suffer from a lack of accurate comparison with similar open surgical procedures.
Methods and Results—
A consecutive cohort of patients with thoracic and thoracoabdominal aneurysms treated electively with endovascular repair (ER) or surgical repair (SR) techniques between 2001 and 2006 were analyzed. The association between repair technique and SCI was evaluated with univariable analysis. Adjustments for potential confounders and for the propensity to receive ER or SR were also performed in multivariable analysis. A total of 724 patients (352 ER, 372 SR) underwent repair. The mean age was 67 years, and 65% were male. ER patients were on average 9 years older (
P
<0.001), had more comorbid conditions, and more frequently had prior distal repair (
P
<0.001) or underwent a type I or IV repair. SR patients more commonly had chronic dissection or required type II or type III repairs (
P
<0.001). Mortality at 30 days (5.7% ER versus 8.3% SR,
P
=0.2) and 12 months (15.6% ER versus 15.9% SR,
P
=0.9) was similar. A borderline difference in SCI was found between repair techniques: 4.3% of ER and 7.5% of SR patients (
P
=0.08) had SCI. In patients with ER, prior distal aortic operation was associated with the development of SCI in univariable analysis (odds ratio 4.1, 95% confidence interval 1.4 to 11.7). Multivariable analysis showed that the type of required repair (type I, II, III, or IV) was the primary factor associated with the development of SCI in ER and SR patients.
Conclusion—
No significant difference in the incidence of mortality or SCI was found between ER and SR techniques. The strongest factor associated with SCI remains the extent of the disease. Further studies are indicated to compare ER with patients considered eligible for SR.
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Affiliation(s)
| | - Qingsheng Lu
- From The Cleveland Clinic Foundation, Cleveland, Ohio
| | | | | | | | | | | | - Marcelo Cury
- From The Cleveland Clinic Foundation, Cleveland, Ohio
| | | | - Kathryn Pfaff
- From The Cleveland Clinic Foundation, Cleveland, Ohio
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22
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Neurophysiologic Intraoperative Monitoring During Endovascular Stent Graft Repair of the Descending Thoracic Aorta. J Clin Neurophysiol 2007; 24:328-35. [DOI: 10.1097/wnp.0b013e31811ebf6e] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
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23
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Electrophysiologic Monitoring During Surgery to Repair the Thoraco-Abdominal Aorta. J Clin Neurophysiol 2007; 24:316-27. [DOI: 10.1097/wnp.0b013e31811ebc66] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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24
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Weigang E, Luehr M, Harloff A, Euringer W, Etz CD, Szabó G, Beyersdorf F, Siegenthaler MP. Incidence of neurological complications following overstenting of the left subclavian artery. Eur J Cardiothorac Surg 2007; 31:628-36. [PMID: 17275319 DOI: 10.1016/j.ejcts.2006.12.026] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2006] [Revised: 11/27/2006] [Accepted: 12/05/2006] [Indexed: 10/23/2022] Open
Abstract
OBJECTIVE Aortic endovascular stent-graft implantation is associated with low morbidity and mortality rates. Overstenting of the left subclavian artery may be necessary to create a satisfactory proximal 'landing zone' for the stent-graft. Few cases have been published reporting adverse neurological events after overstenting of the left subclavian artery. We thus evaluated whether this procedure is associated with a higher rate of neurological complications by focusing on the management of the supra-aortic vessels. METHODS Twenty patients suffering from aortic arch aneurysms (n=3), descending aortic aneurysms (n=7), acute (n=6) and chronic (n=4) type-B aortic dissections underwent stent-graft repair with complete (n=14) or partial (n=6) overstenting of the left subclavian artery. Three patients underwent overstenting of the entire aortic arch with ascending aortic-bi-carotid bypass grafting. One patient with right carotid and vertebral artery occlusion underwent initial carotid-to-subclavian bypass. All patients subsequently underwent neurological examination and Doppler ultrasound for detection of neurological and peripheral vascular complications. RESULTS Aortic stent-graft repair was successful in all patients without acute neurologic complications. Two patients developed late central adverse neurological events: right-sided vertebral artery occlusion with brainstem infarction (n=1) and impaired binocular vision combined with dizziness (n=1), necessitating secondary subclavian transposition in one patient. Peripheral symptoms related to occlusion of the left subclavian artery were observed in five patients as sensory and motoric deficits of the left hand and arm. CONCLUSIONS Overstenting of the left subclavian artery as treatment of aortic pathologies in high-risk patients is feasible but associated with the risk of neurological complications and peripheral symptoms. Side effects were mild or transient in most of our patients. Detailed preoperative exploration of vascular anatomy and pathology via Doppler ultrasound, CT- or MRI scan is mandatory to avoid adverse neurological events. Prior surgical revascularization of the left subclavian artery is essential in patients with high-grade stenoses, occlusions, or anatomic variants of the supra-aortic branches. Delayed surgical revascularization is necessary only in patients with relevant subclavian steal syndrome or severe peripheral vascular symptoms.
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Affiliation(s)
- Ernst Weigang
- Department of Cardiovascular Surgery, University Medical Center Freiburg, Freiburg, Germany.
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