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Menghini D, Kaushal SG, Flannery SW, Ecklund K, Murray MM, Fleming BC, Kiapour AM. Three-dimensional magnetic resonance imaging analysis shows sex-specific patterns in changes in anterior cruciate ligament cross-sectional area along its length. J Orthop Res 2023; 41:771-778. [PMID: 35803594 PMCID: PMC9825677 DOI: 10.1002/jor.25413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 06/29/2022] [Accepted: 07/02/2022] [Indexed: 02/04/2023]
Abstract
Smaller anterior cruciate ligament (ACL) size in females has been hypothesized to be a key contributor to a higher incidence of ACL tears in that population, as a lower cross-sectional area (CSA) directly corresponds to a larger stress on the ligament for a given load. Prior studies have used a mid-length CSA measurement to quantify ACL size. In this study, we used magnetic resonance imaging to quantify the CSA along the entire length of the intact ACL. We hypothesized that changes in the ACL CSA along its length would have different patterns in males and females. We also hypothesized that changes in ACL CSA along its length would be associated with body size or knee size with different associations in females and males. MR images of contralateral ACL-intact knees of 108 patients (62 females, 13-35 years) undergoing ACL surgery were used to measure the CSA along the ACL length, using a custom program. For both females and males, the largest CSA was located at 37%-39% of ACL length from the tibial insertion. Compared to females, males had a significantly larger CSA only within the distal 41% of the ACL (p < 0.001). ACL CSA was associated with patient height and weight in males (r > 0.3; p < 0.05), whereas it was associated with intercondylar notch width in females (r > 0.3; p < 0.05). These findings highlight the importance of standardizing the location of measurement of ACL CSA.
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Affiliation(s)
- Danilo Menghini
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
- Department of Health Sciences and Technology, ETH Zurich, CH-8092 Zurich, Switzerland
| | - Shankar G. Kaushal
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
| | - Sean W. Flannery
- Department of Orthopaedics, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence RI 02818
| | - Kirsten Ecklund
- Department of Radiology, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
| | - Martha M. Murray
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
| | - Braden C. Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University, Rhode Island Hospital, Providence RI 02818
| | - Ata M. Kiapour
- Department of Orthopaedic Surgery, Boston Children’s Hospital, Harvard Medical School, Boston, MA 02115
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Flannery SW, Beveridge JE, Proffen BL, Walsh EG, Kramer DE, Murray MM, Kiapour AM, Fleming BC. Predicting anterior cruciate ligament failure load with T 2* relaxometry and machine learning as a prospective imaging biomarker for revision surgery. Sci Rep 2023; 13:3524. [PMID: 36864112 PMCID: PMC9981601 DOI: 10.1038/s41598-023-30637-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 02/27/2023] [Indexed: 03/04/2023] Open
Abstract
Non-invasive methods to document healing anterior cruciate ligament (ACL) structural properties could potentially identify patients at risk for revision surgery. The objective was to evaluate machine learning models to predict ACL failure load from magnetic resonance images (MRI) and to determine if those predictions were related to revision surgery incidence. It was hypothesized that the optimal model would demonstrate a lower mean absolute error (MAE) than the benchmark linear regression model, and that patients with a lower estimated failure load would have higher revision incidence 2 years post-surgery. Support vector machine, random forest, AdaBoost, XGBoost, and linear regression models were trained using MRI T2* relaxometry and ACL tensile testing data from minipigs (n = 65). The lowest MAE model was used to estimate ACL failure load for surgical patients at 9 months post-surgery (n = 46) and dichotomized into low and high score groups via Youden's J statistic to compare revision incidence. Significance was set at alpha = 0.05. The random forest model decreased the failure load MAE by 55% (Wilcoxon signed-rank test: p = 0.01) versus the benchmark. The low score group had a higher revision incidence (21% vs. 5%; Chi-square test: p = 0.09). ACL structural property estimates via MRI may provide a biomarker for clinical decision making.
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Affiliation(s)
- Sean W Flannery
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Coro West, Suite 402, 1 Hoppin St, Providence, RI, 02903, USA
| | - Jillian E Beveridge
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Coro West, Suite 402, 1 Hoppin St, Providence, RI, 02903, USA
| | - Benedikt L Proffen
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Edward G Walsh
- Department of Neuroscience, Division of Biology and Medicine, Brown University, Providence, RI, USA
| | - Dennis E Kramer
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Martha M Murray
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Ata M Kiapour
- Division of Sports Medicine, Department of Orthopaedic Surgery, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Braden C Fleming
- Department of Orthopaedics, Warren Alpert Medical School of Brown University/Rhode Island Hospital, Coro West, Suite 402, 1 Hoppin St, Providence, RI, 02903, USA.
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Ross JM, Santarnecchi E, Lian SJ, Fong TG, Touroutoglou A, Cavallari M, Travison TG, Marcantonio ER, Libermann TA, Schmitt E, Inouye SK, Shafi MM, Pascual-Leone A. Neurophysiologic predictors of individual risk for post-operative delirium after elective surgery. J Am Geriatr Soc 2023; 71:235-244. [PMID: 36226896 PMCID: PMC9870959 DOI: 10.1111/jgs.18072] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Revised: 08/16/2022] [Accepted: 08/21/2022] [Indexed: 01/27/2023]
Abstract
BACKGROUND Post-surgical delirium is associated with increased morbidity, lasting cognitive decline, and loss of functional independence. Within a conceptual framework that delirium is triggered by stressors when vulnerabilities exist in cerebral connectivity and plasticity, we previously suggested that neurophysiologic measures might identify individuals at risk for post-surgical delirium. Here we demonstrate the feasibility of the approach and provide preliminary experimental evidence of the predictive value of such neurophysiologic measures for the risk of delirium in older persons undergoing elective surgery. METHODS Electroencephalography (EEG) and transcranial magnetic stimulation (TMS) were collected from 23 patients prior to elective surgery. Resting-state EEG spectral power ratio (SPR) served as a measure of integrity of neural circuits. TMS-EEG metrics of plasticity (TMS-plasticity) were used as indicators of brain capacity to respond to stressors. Presence or absence of delirium was assessed using the confusion assessment method (CAM). We included individuals with no baseline clinically relevant cognitive impairment (MoCA scores ≥21) in order to focus on subclinical neurophysiological measures. RESULTS In patients with no baseline cognitive impairment (N = 20, age = 72 ± 6), 3 developed post-surgical delirium (MoCA = 24 ± 2.6) and 17 did not (controls; MoCA = 25 ± 2.4). Patients who developed delirium had pre-surgical resting-state EEG power ratios outside the 95% confidence interval of controls, and 2/3 had TMS-plasticity measures outside the 95% CI of controls. CONCLUSIONS Consistent with our proposed conceptual framework, this pilot study suggests that non-invasive and scalable neurophysiologic measures can identify individuals at risk of post-operative delirium. Specifically, abnormalities in resting-state EEG spectral power or TMS-plasticity may indicate sub-clinical risk for post-surgery delirium. Extension and confirmation of these findings in a larger sample is needed to assess the clinical utility of the proposed neurophysiologic markers, and to identify specific connectivity and plasticity targets for therapeutic interventions that might minimize the risk of delirium.
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Affiliation(s)
- Jessica M. Ross
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Boston, MA, USA
- Department of Neurology, Harvard Medical School, Boston, MA, USA
- Veterans Affairs Palo Alto Healthcare System, and the Sierra Pacific Mental Illness, Research, Education, and Clinical Center, Palo Alto, CA, USA
- Department of Psychiatry and Behavioral Sciences, Stanford Medical School, Stanford, CA, USA
| | - Emiliano Santarnecchi
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Boston, MA, USA
- Department of Neurology, Harvard Medical School, Boston, MA, USA
- Precision Neuroscience & Neuromodulation Program (PNN), Gordon Center for Medical Imaging, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Shu Jing Lian
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Tamara G. Fong
- Department of Neurology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Aging Brain Center, Marcus Institute for Aging Research, Hebrew SeniorLife, Harvard Medical School, Boston, MA, USA
| | - Alexandra Touroutoglou
- Department of Neurology, Harvard Medical School, Boston, MA, USA
- Frontotemporal Disorders Unit, Department of Neurology, Massachusetts General Hospital, Harvard Medical School, Boston, MA, USA
| | - Michele Cavallari
- Center for Neurological Imaging, Department of Radiology, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, USA
| | - Thomas G. Travison
- Aging Brain Center, Marcus Institute for Aging Research, Hebrew SeniorLife, Harvard Medical School, Boston, MA, USA
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Edward R. Marcantonio
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Towia A. Libermann
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
| | - Eva Schmitt
- Aging Brain Center, Marcus Institute for Aging Research, Hebrew SeniorLife, Harvard Medical School, Boston, MA, USA
| | - Sharon K. Inouye
- Department of Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA, USA
- Hinda and Arthur Marcus Institute for Aging Research, and Deanna and Sidney Wolk Center for Memory Health, Hebrew SeniorLife, Boston, MA, USA
| | - Mouhsin M. Shafi
- Berenson-Allen Center for Noninvasive Brain Stimulation, Beth Israel Deaconess Medical Center, Boston, MA, USA
- Department of Neurology, Harvard Medical School, Boston, MA, USA
| | - Alvaro Pascual-Leone
- Department of Neurology, Harvard Medical School, Boston, MA, USA
- Hinda and Arthur Marcus Institute for Aging Research, and Deanna and Sidney Wolk Center for Memory Health, Hebrew SeniorLife, Boston, MA, USA
- Guttmann Brain Health Institute, Institut Guttmann, Barcelona, Spain
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Dhand A, McCafferty L, Grashow R, Corbin IM, Cohan S, Whittington AJ, Connor A, Baggish A, Weisskopf M, Zafonte R, Pascual-Leone A, Barabási AL. Social network structure and composition in former NFL football players. Sci Rep 2021; 11:1630. [PMID: 33526803 PMCID: PMC7851122 DOI: 10.1038/s41598-020-80091-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 12/09/2020] [Indexed: 12/24/2022] Open
Abstract
Social networks have broad effects on health and quality of life. Biopsychosocial factors may also modify the effects of brain trauma on clinical and pathological outcomes. However, social network characterization is missing in studies of contact sports athletes. Here, we characterized the personal social networks of former National Football League players compared to non-football US males. In 303 former football players and 269 US males, we found that network structure (e.g., network size) did not differ, but network composition (e.g., proportion of family versus friends) did differ. Football players had more men than women, and more friends than family in their networks compared to US males. Black players had more racially diverse networks than White players and US males. These results are unexpected because brain trauma and chronic illnesses typically cause diminished social relationships. We anticipate our study will inform more multi-dimensional study of, and treatment options for, contact sports athletes. For example, the strong allegiances of former athletes may be harnessed in the form of social network interventions after brain trauma. Because preserving health of contact sports athletes is a major goal, the study of social networks is critical to the design of future research and treatment trials.
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Affiliation(s)
- Amar Dhand
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA.
- Department of Neurology, Brigham and Women's Hospital, Boston, MA, USA.
- Network Science Institute, Northeastern University, Boston, MA, USA.
| | - Liam McCafferty
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA
- Department of Neurology, Brigham and Women's Hospital, Boston, MA, USA
| | - Rachel Grashow
- Football Players Health Study at Harvard University, Boston, MA, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Ian M Corbin
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA
- Department of Neurology, Brigham and Women's Hospital, Boston, MA, USA
| | - Sarah Cohan
- Football Players Health Study at Harvard University, Boston, MA, USA
| | | | - Ann Connor
- Department of Neurology, Berenson-Allen Center, Beth Israel Deaconess Medical Center, Boston, MA, USA
| | - Aaron Baggish
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA
- Football Players Health Study at Harvard University, Boston, MA, USA
- Department of Cardiology, Massachusetts General Hospital, Boston, MA, USA
| | - Mark Weisskopf
- Football Players Health Study at Harvard University, Boston, MA, USA
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, MA, USA
| | - Ross Zafonte
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA
- Football Players Health Study at Harvard University, Boston, MA, USA
- Department of Physical Medicine and Rehabilitation, Spaulding Rehabilitation Hospital, Massachusetts General Hospital, Brigham and Women's Hospital, Boston, MA, USA
| | - Alvaro Pascual-Leone
- Brigham and Women's Hospital/Harvard Medical School, Boston, MA, 02115, USA
- Hinda and Arthur Marcus Institute for Aging Research and Center for Memory Health, Hebrew SeniorLife, Boston, MA, USA
- Guttmann Brain Health Institut, Institut Guttmann, Universitat Autonoma Barcelona, Barcelona, Spain
| | - Albert-László Barabási
- Network Science Institute, Northeastern University, Boston, MA, USA
- Department of Physics, Northeastern University, Boston, MA, USA
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