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Soliman MA, Ramadan A, Shah AS, Corr SJ, Abdelazeem B, Rahimi M. Postoperative Spinal Cord Ischemia Monitoring: A Review of Techniques Available after Endovascular Aortic Repair. Ann Vasc Surg 2024; 106:438-466. [PMID: 38815914 DOI: 10.1016/j.avsg.2024.03.022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 03/11/2024] [Accepted: 03/17/2024] [Indexed: 06/01/2024]
Abstract
BACKGROUND Spinal cord ischemia is one of the complications that can occur after open and endovascular thoracoabdominal aortic repair. This occurs despite various perioperative approaches, including distal aortic perfusion, hybrid procedures with extra anatomical bypasses, motor-evoked potential, and cerebrospinal fluid drainage. The inability to recognize spinal ischemia in a timely manner remains a devastating complication after thoracoabdominal aortic repair.This review aims to look at novel technologies that are designed for continuous monitoring to detect early changes that signal the development of spinal cord ischemia and to discuss their benefits and limitations. METHODS We conducted a systematic review of the technologies available for continuous monitoring in the intensive care unit for early detection of spinal cord ischemia. Studies were eligible for inclusion if they used different technologies for monitoring spinal ischemia during the postoperative period. All articles that were not available in English were excluded. To ensure that all relevant articles were included, no other significant restrictions were imposed. RESULTS We identified 59 studies from the outset to December 2022 to be included in our study. New techniques have been studied as potentially useful monitoring tools that could provide simple and effective monitoring of the spinal cord. These include near-infrared spectroscopy, contrast-enhanced ultrasound, magnetic resonance imaging, fiber optic monitoring of the spinal cord, and cerebrospinal fluid biomarkers. CONCLUSIONS Despite the development of new techniques to monitor for postoperative spinal cord ischemia, their use remains limited. We recommend more future research to ensure rapid intervention for our patients.
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Affiliation(s)
| | - Alaa Ramadan
- Faculty of Medicine, South Valley University, Qena, Egypt
| | - Anuj S Shah
- Cardiovascular Surgery Department, Houston Methodist Hospital, TX
| | - Stuart J Corr
- Cardiovascular Surgery Department, Houston Methodist Hospital, TX
| | - Basel Abdelazeem
- Cardiology Department, West Virginia University, Morgantown, West Virginia
| | - Maham Rahimi
- Cardiovascular Surgery Department, Houston Methodist Hospital, TX
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2
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Lee KZ, Liu TT, Chen RY. Therapeutic efficacy of adrenergic agents on systemic and spinal hemodynamics in an acute cervical spinal cord injury rodent model. Spine J 2024:S1529-9430(24)00191-8. [PMID: 38679076 DOI: 10.1016/j.spinee.2024.04.023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 04/19/2024] [Accepted: 04/23/2024] [Indexed: 05/01/2024]
Abstract
BACKGROUND Cervical spinal cord injury usually results in cardiorespiratory dysfunctions due to interruptions of the bulbospinal pathways innervating the cervical phrenic motoneurons and thoracic sympathetic preganglionic neurons. PURPOSE The present study aimed to evaluate the therapeutic effects of adrenergic agents on systemic and spinal hemodynamics during acute cervical spinal cord injury. STUDY DESIGN In vivo animal study. METHODS The cardiorespiratory function and spinal cord blood flow and oxygenation level were monitored in response to cervical spinal cord contusion and intravenous infusion of three types of adrenergic agents (phenylephrine, dobutamine, and norepinephrine). RESULTS Cervical spinal cord contusion resulted in immediate reduction of respiratory airflow, arterial blood pressure, and spinal cord blood flow. The arterial blood pressure and spinal cord blood flow remained lower than the pre-injury value in contused animals infused with saline at 60 min post-injury. Infusion of phenylephrine (500, 1000, and 2000 μg/kg) and norepinephrine (125, 250, and 500 μg/kg) significantly increased the arterial blood pressure, while only norepinephrine augmented the spinal cord blood flow. Conversely, dobutamine (1000 and 2000 μg/kg) reduced both arterial blood pressure and spinal cord blood flow. Notably, administration of adrenergic agents tended to increase spinal cord hemorrhage in contused animals. CONCLUSIONS Infusion of norepinephrine can effectively maintain the blood pressure and improve spinal cord blood flow during acute spinal cord injury. CLINICAL SIGNIFICANCE Norepinephrine may be a superior medicine for hemodynamic management; however, the potential hemorrhage should be considered when utilizing the vasopressor to regulate systemic and spinal hemodynamics at the acute injured stage.
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Affiliation(s)
- Kun-Ze Lee
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan; Department of Biomedical Science and Environmental Biology, Kaohsiung Medical University, Kaohsiung, Taiwan.
| | - Tzu-Ting Liu
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
| | - Rui-Yi Chen
- Department of Biological Sciences, National Sun Yat-sen University, Kaohsiung, Taiwan
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3
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Ji W, Nightingale TE, Zhao F, Fritz NE, Phillips AA, Sisto SA, Nash MS, Badr MS, Wecht JM, Mateika JH, Panza GS. The Clinical Relevance of Autonomic Dysfunction, Cerebral Hemodynamics, and Sleep Interactions in Individuals Living With SCI. Arch Phys Med Rehabil 2024; 105:166-176. [PMID: 37625532 DOI: 10.1016/j.apmr.2023.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 07/25/2023] [Accepted: 08/06/2023] [Indexed: 08/27/2023]
Abstract
A myriad of physiological impairments is seen in individuals after a spinal cord injury (SCI). These include altered autonomic function, cerebral hemodynamics, and sleep. These physiological systems are interconnected and likely insidiously interact leading to secondary complications. These impairments negatively influence quality of life. A comprehensive review of these systems, and their interplay, may improve clinical treatment and the rehabilitation plan of individuals living with SCI. Thus, these physiological measures should receive more clinical consideration. This special communication introduces the under investigated autonomic dysfunction, cerebral hemodynamics, and sleep disorders in people with SCI to stakeholders involved in SCI rehabilitation. We also discuss the linkage between autonomic dysfunction, cerebral hemodynamics, and sleep disorders and some secondary outcomes are discussed. Recent evidence is synthesized to make clinical recommendations on the assessment and potential management of important autonomic, cerebral hemodynamics, and sleep-related dysfunction in people with SCI. Finally, a few recommendations for clinicians and researchers are provided.
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Affiliation(s)
- Wenjie Ji
- Department of Rehabilitation Science, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY
| | - Tom E Nightingale
- School of Sport, Exercise and Rehabilitation Sciences, University of Birmingham, Birmingham, UK; Centre for Trauma Science Research, University of Birmingham, Birmingham, UK; International Collaboration on Repair Discoveries (ICORD), University of British Columbia, Vancouver, Canada
| | - Fei Zhao
- Department of Health Care Sciences, Program of Occupational Therapy, Wayne State University, Detroit, MI; John D. Dingell VA Medical Center, Research and Development, Detroit, MI
| | - Nora E Fritz
- Department of Health Care Sciences, Program of Physical Therapy, Detroit, MI; Department of Neurology, Wayne State University, Detroit, MI
| | - Aaron A Phillips
- Department of Physiology and Pharmacology, Cardiac Sciences, Clinical Neurosciences, Biomedical Engineering, Libin Cardiovascular institute, Hotchkiss Brain Institute, Cumming School of Medicine, Calgary, AB, Canada; RESTORE.network, University of Calgary, Calgary, AB, Canad
| | - Sue Ann Sisto
- Department of Rehabilitation Science, School of Public Health and Health Professions, University at Buffalo, Buffalo, NY
| | - Mark S Nash
- Department of Neurological Surgery, Physical Medicine & Rehabilitation Physical Therapy, Miami, FL; Miami Project to Cure Paralysis, University of Miami Miller School of Medicine, Miami, FL
| | - M Safwan Badr
- John D. Dingell VA Medical Center, Research and Development, Detroit, MI; Departments of Physiology and Internal Medicine, Wayne State University, Detroit, MI
| | - Jill M Wecht
- James J Peters VA Medical Center, Department of Spinal Cord Injury Research, Bronx, NY; Icahn School of Medicine Mount Sinai, Departments of Rehabilitation and Human Performance, and Medicine Performance, and Medicine, New York, NY
| | - Jason H Mateika
- John D. Dingell VA Medical Center, Research and Development, Detroit, MI; Departments of Physiology and Internal Medicine, Wayne State University, Detroit, MI
| | - Gino S Panza
- Department of Health Care Sciences, Program of Occupational Therapy, Wayne State University, Detroit, MI; John D. Dingell VA Medical Center, Research and Development, Detroit, MI.
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Murata S, Takami M, Endo T, Hashizume H, Iwasaki H, Tsutsui S, Nagata K, Murakami K, Taiji R, Kozaki T, Heller JG, Yamada H. Using Electrical Stimulation of the Ulnar Nerve Trunk to Predict Postoperative Improvement in Hand Clumsiness in Patients With Cervical Spondylotic Myelopathy. Spine (Phila Pa 1976) 2023; 48:702-709. [PMID: 36730659 DOI: 10.1097/brs.0000000000004539] [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] [Received: 07/28/2022] [Accepted: 10/21/2022] [Indexed: 02/04/2023]
Abstract
STUDY DESIGN A prospective cohort study. OBJECTIVE To investigate whether the immediate and short-term effects of preoperative electrical peripheral nerve stimulation (ePNS) on performance of the 10-second test could predict the early postoperative outcomes of patients with cervical spondylotic myelopathy (CSM). SUMMARY OF BACKGROUND DATA Previous studies have shown that early clinical improvement in CSM patients may be because of reversal of spinal cord ischemia after spinal cord compression. MATERIALS AND METHODS We conducted a 10-second test before surgery, after ePNS, and at discharge (one week after surgery) in 44 patients with CSM who underwent C3-C7 laminoplasty and evaluated their correlations. The effects of the procedures (ePNS or operation) and sides (stimulated or nonstimulated side) for the 10-second test were analyzed using repeated measures analysis of variance. The Pearson correlation coefficient was used to measure the relationship between the 10-second test values according to the method (after ePNS vs. surgery). In addition, the Bland-Altman method was used to evaluate the degree of agreement between the 10-second test obtained after ePNS versus shortly after surgery. RESULTS The preoperative 10-second test showed the most improvement immediately after the administration of ePNS, with a gradual decrease for the first 30 minutes after completion. After the initial 30 minutes, performance decreased rapidly, and by 60 minutes performance essentially returned to baseline. The 10-second post-ePNS had a strong positive correlation with the 10-second test in the early postoperative period (at discharge=one week after surgery). These phenomena were observed with the left hand, the side stimulated with ePNS, as well as the right hand, the side not stimulated. CONCLUSIONS Early postoperative outcomes after CSM surgery may be predicted by the results of preoperative ePNS. LEVEL OF EVIDENCE Level 3.
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Affiliation(s)
- Shizumasa Murata
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Masanari Takami
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Toru Endo
- Department of Orthopaedic Surgery, Endo Clinic, Otsu, Shiga, Japan
| | - Hiroshi Hashizume
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Hiroshi Iwasaki
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Shunji Tsutsui
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Keiji Nagata
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Kimihide Murakami
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Ryo Taiji
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - Takuhei Kozaki
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
| | - John G Heller
- Department of Orthopaedic Surgery, The Emory Spine Center, Emory Muskuloskeletal Institute, Atlanta, GA
| | - Hiroshi Yamada
- Department of Orthopaedic Surgery, Wakayama Medical University, Wakayama, Japan
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Oyarzún JE, Caulier-Cisterna R, González-Appelgren JP, Gonzalez L, Trujillo O, Eblen-Zajjur A, Uribe S. Non-invasive near-infrared spectroscopy assessment of the spinal neurovascular response in a patient with transverse myelitis: a case report. BMC Neurol 2022; 22:393. [PMID: 36280834 PMCID: PMC9590209 DOI: 10.1186/s12883-022-02881-1] [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: 05/12/2021] [Accepted: 09/11/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Transverse myelitis (TM) is characterized by acute development of motor, sensory and autonomic dysfunctions due to horizontally diffused inflammation in one or more segments of the spinal cord in the absence of a compressive lesion. The not well-known inflammation process induces demyelination resulting in neurological dysfunction. CASE PRESENTATION In this case report we used a functional Near-Infrared Spectroscopy (fNIRS) technique to evaluate changes in the peri-spinal vascular response induced by a peripheral median nerve electrical stimulation in a patient with chronic transverse myelitis (TM). fNIRS showed drastically reduced signal amplitude in the peri-spinal vascular response, compared to that obtained from a healthy control group throughout most of the C7-T1 and T10-L2 spinal cord segments. CONCLUSION The potential use of this relatively non-invasive fNIRS technology support the potential clinical application of this method for functional test of the spinal cord through the assessment of the spinal neurovascular response.
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Affiliation(s)
- Juan Esteban Oyarzún
- grid.7870.80000 0001 2157 0406Centro de Imágenes Biomédicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Raúl Caulier-Cisterna
- grid.7870.80000 0001 2157 0406Centro de Imágenes Biomédicas, Pontificia Universidad Católica de Chile, Santiago, Chile ,Rielo Institute for Integral Development, New York, USA
| | - Juan Pablo González-Appelgren
- grid.7870.80000 0001 2157 0406Centro de Imágenes Biomédicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Leticia Gonzalez
- grid.7870.80000 0001 2157 0406Centro de Imágenes Biomédicas, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Oscar Trujillo
- grid.7870.80000 0001 2157 0406Neurology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Antonio Eblen-Zajjur
- grid.412193.c0000 0001 2150 3115Laboratorio de Neurociencia Traslacional, Facultad de Medicina, Universidad Diego Portales Santiago, Santiago, Chile
| | - Sergio Uribe
- grid.7870.80000 0001 2157 0406Centro de Imágenes Biomédicas, Pontificia Universidad Católica de Chile, Santiago, Chile ,grid.7870.80000 0001 2157 0406Radiology Department, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
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6
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Pang R, Wang D, Chen TSR, Yang A, Yi L, Chen S, Wang J, Wu K, Zhao C, Liu H, Ai Y, Yang A, Sun J. Reorganization of prefrontal network in stroke patients with dyskinesias: evidence from resting-state functional near-infrared spectroscopy. JOURNAL OF BIOPHOTONICS 2022; 15:e202200014. [PMID: 35324088 DOI: 10.1002/jbio.202200014] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 03/22/2022] [Accepted: 03/22/2022] [Indexed: 06/14/2023]
Abstract
Stroke usually causes multiple functional disability. To develop novel rehabilitation strategies, it is quite necessary to improve the understanding of post-stroke brain plasticity. Here, we use functional near-infrared spectroscopy to investigate the prefrontal cortex (PFC) network reorganization in stroke patients with dyskinesias. The PFC hemodynamic signals in the resting state from 16 stroke patients and 10 healthy subjects are collected and analyzed with the graph theory. The PFC networks for both groups show small-world attributes. The stroke patients have larger clustering coefficient and transitivity and smaller global efficiency and small-worldness than healthy subjects. Based on the selected network features, the established support vector machine model classifies the two groups of subjects with an accuracy rate of 88.5%. Besides, the clustering coefficient and local efficiency negatively correlate with patients' motor function. This study suggests that the PFC of stroke patients with dyskinesias undergoes specific network reorganization.
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Affiliation(s)
- Richong Pang
- School of Mechatronic Engineering and Automation, Foshan University, Foshan, China
| | - Dan Wang
- Department of Traditional Chinese Medicine, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | | | - Anping Yang
- School of Medicine, Foshan University, Foshan, China
| | - Li Yi
- School of Mechatronic Engineering and Automation, Foshan University, Foshan, China
| | - Sisi Chen
- School of Medicine, Foshan University, Foshan, China
| | - Jie Wang
- Department of Traditional Chinese Medicine, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Kai Wu
- School of Biomedical Sciences and Engineering, South China University of Technology, Guangzhou, China
| | - Chaochao Zhao
- School of Medicine, Foshan University, Foshan, China
| | - Hua Liu
- Department of Traditional Chinese Medicine, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Yilong Ai
- Foshan Stomatological Hospital, School of Medicine, Foshan University, Foshan, China
| | - Aoran Yang
- Department of Traditional Chinese Medicine, Beijing Rehabilitation Hospital of Capital Medical University, Beijing, China
| | - Jinyan Sun
- School of Medicine, Foshan University, Foshan, China
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Mainard N, Tsiakaka O, Li S, Denoulet J, Messaoudene K, Vialle R, Feruglio S. Intraoperative Optical Monitoring of Spinal Cord Hemodynamics Using Multiwavelength Imaging System. SENSORS (BASEL, SWITZERLAND) 2022; 22:3840. [PMID: 35632249 PMCID: PMC9146887 DOI: 10.3390/s22103840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 05/13/2022] [Accepted: 05/16/2022] [Indexed: 12/10/2022]
Abstract
The spinal cord is a major structure of the central nervous system allowing, among other things, the transmission of afferent sensory and efferent motor information. During spinal surgery, such as scoliosis correction, this structure can be damaged, resulting in major neurological damage to the patient. To date, there is no direct way to monitor the oxygenation of the spinal cord intraoperatively to reflect its vitality. This is essential information that would allow surgeons to adapt their procedure in case of ischemic suffering of the spinal cord. We report the development of a specific device to monitor the functional status of biological tissues with high resolution. The device, operating with multiple wavelengths, uses Near-InfraRed Spectroscopy (NIRS) in combination with other additional sensors, including ElectroNeuroGraphy (ENG). In this paper, we focused primarily on aspects of the PhotoPlethysmoGram (PPG), emanating from four different light sources to show in real time and record biological signals from the spinal cord in transmission and reflection modes. This multispectral system was successfully tested in in vivo experiments on the spinal cord of a pig for specific medical applications.
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Affiliation(s)
- Nicolas Mainard
- Department of Pediatric Surgery, Jeanne-de-Flandre Hospital, CHU Lille, Avenue Eugène-Avinée, 59000 Lille, France
- Laboratoire D’Informatique de Paris 6 (LIP6), CNRS UMR7606, Sorbonne Université, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (S.L.); (J.D.); (K.M.); (S.F.)
| | - Olivier Tsiakaka
- CERVO, Biomedical Microsystems Laboratory, Université Laval, Quebec, QC G1V 0A6, Canada;
| | - Songlin Li
- Laboratoire D’Informatique de Paris 6 (LIP6), CNRS UMR7606, Sorbonne Université, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (S.L.); (J.D.); (K.M.); (S.F.)
| | - Julien Denoulet
- Laboratoire D’Informatique de Paris 6 (LIP6), CNRS UMR7606, Sorbonne Université, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (S.L.); (J.D.); (K.M.); (S.F.)
| | - Karim Messaoudene
- Laboratoire D’Informatique de Paris 6 (LIP6), CNRS UMR7606, Sorbonne Université, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (S.L.); (J.D.); (K.M.); (S.F.)
| | - Raphael Vialle
- Clinical Research Group “RIC” Robotics and Surgical Innovations, GRC-33 Sorbonne University, 26 Avenue du Dr. Arnold Netter, 75012 Paris, France;
| | - Sylvain Feruglio
- Laboratoire D’Informatique de Paris 6 (LIP6), CNRS UMR7606, Sorbonne Université, 4 Place Jussieu, CEDEX 05, 75252 Paris, France; (S.L.); (J.D.); (K.M.); (S.F.)
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Coutinho EST, Medeiros Neto LP, Bhattacharjee T, Arisawa EALS, Sant'Anna LB. Raman spectroscopy of healthy, injured and amniotic membrane treated rat spinal cords. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2022; 265:120323. [PMID: 34534772 DOI: 10.1016/j.saa.2021.120323] [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: 06/06/2021] [Revised: 08/15/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
Spinal cord injury is a significant public health issue with high psychological and financial costs to both the family and the society. Effective treatment strategies are hence of immense value. Several reports have suggested application of amniotic membrane for treating injuries, and there is evidence that it may be used to treat spinal injuries. In this animal model study, we explore biochemical changes in amniotic membrane treated injured spinal cord with respect to untreated injured and uninjured spinal cord using Raman spectroscopy. Multivariate statistical analysis is able to classify control, untreated, and treated with 92%, 87%, and 80% efficiency, respectively; suggesting unique biochemical changes in each group. Such studies may lead to development of minimally invasive methodologies for spinal cord injury treatment monitoring.
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Affiliation(s)
- Elisabeth Salmagi Teixeira Coutinho
- Laboratory of Histology and Regenerative Therapy, Institute for Research and Development (IP&D), Universidade do Vale do Paraíba (UniVap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, 12244-000 São Paulo (SP), Brazil
| | - Lázaro Pinto Medeiros Neto
- Scientific and Technological Institute of Brazil University, Universidade Brasil, Rua Carolina Fonseca, 584, Itaquera, São Paulo, 08230-030 São Paulo (SP), Brazil
| | - Tanmoy Bhattacharjee
- Sir John Walsh Research Institute, University of Otago, Dunedin 9016, New Zealand
| | - Emilia Angela Lo Schiavo Arisawa
- Laboratory of Histology and Regenerative Therapy, Institute for Research and Development (IP&D), Universidade do Vale do Paraíba (UniVap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, 12244-000 São Paulo (SP), Brazil.
| | - Luciana Barros Sant'Anna
- Laboratory of Histology and Regenerative Therapy, Institute for Research and Development (IP&D), Universidade do Vale do Paraíba (UniVap), Av. Shishima Hifumi, 2911, Urbanova, São José dos Campos, 12244-000 São Paulo (SP), Brazil
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Awad H, Raza A, Saklayen S, Bhandary S, Kelani H, Powers C, Bourekas E, Stine I, Milner R, Valentine E, Essandoh M. Combined Stroke and Spinal Cord Ischemia in Hybrid Type I Aortic Arch Debranching and TEVAR and the Dual Role of the Left Subclavian Artery. J Cardiothorac Vasc Anesth 2021; 36:3687-3700. [PMID: 34538558 DOI: 10.1053/j.jvca.2021.08.030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 08/20/2021] [Indexed: 11/11/2022]
Affiliation(s)
- Hamdy Awad
- Department of Anesthesiology at the Wexner Medical Center at the Ohio State University, Columbus, OH.
| | - Arwa Raza
- Ohio State University College of Medicine, Columbus, OH
| | - Samiya Saklayen
- Department of Anesthesiology at the Wexner Medical Center at the Ohio State University, Columbus, OH
| | - Sujatha Bhandary
- Department of Anesthesiology at Emory University School of Medicine, Atlanta, GA
| | - Hesham Kelani
- Department of Anesthesiology at the Wexner Medical Center at the Ohio State University, Columbus, OH
| | - Ciaran Powers
- Department of Neurosurgery at the Wexner Medical Center at the Ohio State University, Columbus, OH
| | - Eric Bourekas
- Department of Radiology at Wexner Medical Center at the Ohio State University, Columbus, OH
| | - Ian Stine
- Department of Surgery at the University of Chicago, Chicago, IL
| | - Ross Milner
- Department of Surgery at the University of Chicago, Chicago, IL
| | - Elizabeth Valentine
- Department of Anesthesiology and Critical Care, Hospital of the University of Pennsylvania, Philadelphia, PA
| | - Michael Essandoh
- Department of Anesthesiology at the Wexner Medical Center at the Ohio State University, Columbus, OH
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10
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Safety and Feasibility of Lumbar Cerebrospinal Fluid Pressure and Intraspinal Pressure Studies in Cervical Stenosis: A Case Series. ACTA NEUROCHIRURGICA. SUPPLEMENT 2021. [PMID: 33839876 DOI: 10.1007/978-3-030-59436-7_70] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
INTRODUCTION Degenerative cervical myelopathy (DCM) leads to functional impairment by compression of the spinal cord and nerve roots. In DCM, the dynamics of cerebrospinal fluid pressure (CSFP) and intraspinal pressure (ISP), as well as spinal cord perfusion pressure (SCPP) remain not investigated yet. Recent technical advances have enabled investigation of these parameters in acute spinal cord injury (SCI). We aim to investigate the properties of CSFP/ISP and spinal cord hemodynamics during and after decompressive surgery in DCM. MATERIALS AND METHODS Four patients with DCM were enrolled; during surgery and 24 h postoperative, ISP at level was measured in one patient, and CSFP was measured in two patients. In one patient, CSFP was recorded at bedside before surgery. RESULTS All measurements were conducted without adverse events and were well tolerated. With CSFP analysis, post-decompression Queckenstedt's test was responsive in two patients (i.e., jugular vein compression resulted in an elevation of CSFP pressure). In the patient whose CSFP was tested at bedside, Queckenstedt's test was not responsive before decompression. Individual optimum SCPPs were calculated to be between 70 and 75 mmHg. CONCLUSION ISP and CSFP can reflect spinal compression and sufficient decompression. A better understanding and systematic monitoring possibly lead to improved hemodynamic management and may allow early recognition of postoperative complications such as swelling and bleeding.
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11
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Ray PS. Multimodal Intraoperative Neural Monitoring for Neurosurgical Spinal Operations Standard of Care–A Debate or a Foregone Conclusion and the Future Ahead. INDIAN JOURNAL OF NEUROSURGERY 2020. [DOI: 10.1055/s-0040-1715786] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Affiliation(s)
- Partha S. Ray
- Department of Neurology and Clinical Ne urophysiology, National Health Service, Liverpool, United Kingdom
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12
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Gitajn IL, Slobogean GP, Henderson ER, von Keudell AG, Harris MB, Scolaro JA, O’Hara NN, Elliott JT, Pogue BW, Jiang S. Perspective on optical imaging for functional assessment in musculoskeletal extremity trauma surgery. JOURNAL OF BIOMEDICAL OPTICS 2020; 25:JBO-200070-PER. [PMID: 32869567 PMCID: PMC7457961 DOI: 10.1117/1.jbo.25.8.080601] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 08/12/2020] [Indexed: 06/11/2023]
Abstract
SIGNIFICANCE Extremity injury represents the leading cause of trauma hospitalizations among adults under the age of 65 years, and long-term impairments are often substantial. Restoring function depends, in large part, on bone and soft tissue healing. Thus, decisions around treatment strategy are based on assessment of the healing potential of injured bone and/or soft tissue. However, at the present, this assessment is based on subjective clinical clues and/or cadaveric studies without any objective measure. Optical imaging is an ideal method to solve several of these issues. AIM The aim is to highlight the current challenges in assessing bone and tissue perfusion/viability and the potentially high impact applications for optical imaging in orthopaedic surgery. APPROACH The prospective will review the current challenges faced by the orthopaedic surgeon and briefly discuss optical imaging tools that have been published. With this in mind, it will suggest key research areas that could be evolved to help make surgical assessments more objective and quantitative. RESULTS Orthopaedic surgical procedures should benefit from incorporation of methods to measure functional blood perfusion or tissue metabolism. The types of measurements though can vary in the depth of tissue sampled, with some being quite superficial and others sensing several millimeters into the tissue. Most of these intrasurgical imaging tools represent an ideal way to improve surgical treatment of orthopaedic injuries due to their inherent point-of-care use and their compatibility with real-time management. CONCLUSION While there are several optical measurements to directly measure bone function, the choice of tools can determine also the signal strength and depth of sampling. For orthopaedic surgery, real-time data regarding bone and tissue perfusion should lead to more effective patient-specific management of common orthopaedic conditions, requiring deeper penetrance commonly seen with indocyanine green imaging. This will lower morbidity and result in decreased variability associated with how these conditions are managed.
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Affiliation(s)
- Ida L. Gitajn
- Dartmouth-Hitchcock Medical Center, Department of Orthopaedics, Lebanon, New Hampshire, United States
| | - Gerard P. Slobogean
- University of Maryland, Orthopaedic Associates, Baltimore, Maryland, United States
| | - Eric R. Henderson
- Dartmouth-Hitchcock Medical Center, Department of Orthopaedics, Lebanon, New Hampshire, United States
| | - Arvind G. von Keudell
- Brigham and Women’s Hospital, Department of Orthopaedic Surgery, Boston, Massachusetts, United States
| | - Mitchel B. Harris
- Massachusetts General Hospital, Department of Orthopaedic Surgery, Boston, Massachusetts, United States
| | - John A. Scolaro
- University of California, Irvine, Department of Orthopaedic Surgery, Orange, California, United States
| | - Nathan N. O’Hara
- University of Maryland, Orthopaedic Associates, Baltimore, Maryland, United States
| | - Jonathan T. Elliott
- Dartmouth-Hitchcock Medical Center, Department of Surgery, Lebanon, New Hampshire, United States
| | - Brian W. Pogue
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
| | - Shudong Jiang
- Dartmouth College, Thayer School of Engineering, Hanover, New Hampshire, United States
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Source-Detector Spectral Pairing-Related Inaccuracies in Pulse Oximetry: Evaluation of the Wavelength Shift. SENSORS 2020; 20:s20113302. [PMID: 32532116 PMCID: PMC7309008 DOI: 10.3390/s20113302] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 01/19/2023]
Abstract
Pulse oximetry enables oxygen saturation estimation (SpO2) non-invasively in real time with few components and modest processing power. With the advent of affordable development kits dedicated to the monitoring of biosignals, capabilities once reserved to hospitals and high-end research laboratories are becoming accessible for rapid prototyping. While one may think that medical-grade equipment differs greatly in quality, surprisingly, we found that the performance requirements are not widely different from available consumer-grade components, especially regarding the photodetection module in pulse oximetry. This study investigates how the use of candidate light sources and photodetectors for the development of a custom SpO2 monitoring system can lead to inaccuracies when using the standard computational model for oxygen saturation without calibration. Following the optical characterization of selected light sources, we compare the extracted parameters to the key features in their respective datasheet. We then quantify the wavelength shift caused by spectral pairing of light sources in association with photodetectors. Finally, using the widely used approximation, we report the resulting absolute error in SpO2 estimation and show that it can lead up to 8% of the critical 90–100% saturation window.
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14
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Kurita T, Kawashima S, Morita K, Nakajima Y. Spinal cord autoregulation using near-infrared spectroscopy under normal, hypovolemic, and post-fluid resuscitation conditions in a swine model: a comparison with cerebral autoregulation. J Intensive Care 2020; 8:27. [PMID: 32318269 PMCID: PMC7158138 DOI: 10.1186/s40560-020-00443-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 03/31/2020] [Indexed: 11/17/2022] Open
Abstract
Background Few studies have investigated spinal cord autoregulation using near-infrared spectroscopy (NIRS). Here, we assessed spinal cord autoregulation under normal, hypovolemic, and post-fluid resuscitation conditions compared with cerebral autoregulation. Methods Ten pigs (36.1 ± 1.1 kg) were anesthetized with 2.5% isoflurane, before phenylephrine administration at 0.5, 1, 2, and 5 μg kg−1 min−1 in a stepwise fashion at 10-min intervals (baseline), followed by similar administration of sodium nitroprusside (SNP). Hypovolemia was induced by a 600-ml bleed (25% estimated total blood volume). Only phenylephrine was readministered (same protocol). Hypovolemia was reversed by infusing 600 ml hydroxyethyl starch, before readministering phenylephrine and SNP. The relationships between mean arterial pressure (MAP) and cerebral, thoracic, and lumbar spinal cord tissue oxygenation indices (TOIs) were evaluated. Results Thoracic and lumbar spinal cord TOIs were approximately 15% and 10% lower, respectively, than the cerebral TOI at similar MAPs. The average relationship between MAP and each TOI showed an autoregulatory pattern, but negative correlations were observed in the cerebral TOI during phenylephrine infusion. A 600-ml bleed lowered each relationship < 5% and subsequent fluid resuscitation did not change the relationship. Individual oxygenation responses to blood pressure indicated that the spinal cord is more pressure-passive than the cerebrum. Paradoxical responses (an inverse relationship of tissue oxygenation to MAP) were observed particularly in cerebrum during phenylephrine infusion and were rare in the spinal cord. Conclusions Spinal cord autoregulation is less robust than cerebral autoregulation and more pressure-dependent. Similar to cerebral oxygenation, spinal cord oxygenation is volume-tolerant but is more sensitive to hypotension.
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Affiliation(s)
- Tadayoshi Kurita
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192 Japan
| | - Shingo Kawashima
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192 Japan
| | - Koji Morita
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192 Japan
| | - Yoshiki Nakajima
- Department of Anesthesiology and Intensive Care, Hamamatsu University School of Medicine, 1-20-1 Handayama, Hamamatsu, 431-3192 Japan
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15
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Abstract
We review state-of-the-art monitoring techniques for acute, severe traumatic spinal cord injury (TSCI) to facilitate targeted perfusion of the injured cord rather than applying universal mean arterial pressure targets. Key concepts are discussed such as intraspinal pressure and spinal cord perfusion pressure (SCPP) at the injury site, respectively, analogous to intracranial pressure and cerebral perfusion pressure for traumatic brain injury. The concept of spinal cord autoregulation is introduced and quantified using spinal pressure reactivity index (sPRx), which is analogous to pressure reactivity index for traumatic brain injury. The U-shaped relationship between sPRx and SCPP defines the optimum SCPP as the SCPP that minimizes sPRx (i.e., maximizes autoregulation), and suggests that not only ischemia but also hyperemia at the injury site may be detrimental. The observation that optimum SCPP varies between patients and temporally in each patient supports individualized management. We discuss multimodality monitoring, which revealed strong correlations between SCPP and injury site metabolism (tissue glucose, lactate, pyruvate, glutamate, glycerol), monitored by surface microdialysis. Evidence is presented that the dura is a major, but unappreciated, cause of spinal cord compression after TSCI; we thus propose expansion duroplasty as a novel treatment. Monitoring spinal cord blood flow at the injury site has revealed novel phenomena, e.g., 3 distinct blood flow patterns, local steal, and diastolic ischemia. We conclude that monitoring from the injured spinal cord in the intensive care unit is a safe technique that appears to enable optimized and individualized spinal cord perfusion.
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Affiliation(s)
- Samira Saadoun
- Academic Neurosurgery Unit, St. George's University of London, Cranmer Terrace, Tooting, London, SW17 0RE, UK
| | - Marios C Papadopoulos
- Academic Neurosurgery Unit, St. George's University of London, Cranmer Terrace, Tooting, London, SW17 0RE, UK.
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Transcutaneous contrast-enhanced ultrasound imaging of the posttraumatic spinal cord. Spinal Cord 2020; 58:695-704. [PMID: 31965060 DOI: 10.1038/s41393-020-0415-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/21/2019] [Accepted: 12/09/2019] [Indexed: 11/08/2022]
Abstract
STUDY DESIGN Experimental animal study. OBJECTIVE The current study aims to test whether the blood flow within the contused spinal cord can be assessed in a rodent model via the acoustic window of the laminectomy utilizing transcutaneous ultrasound. SETTING Department of Neurological Surgery, University of Washington, Seattle WA. METHODS Long-Evans rats (n = 12) were subjected to a traumatic thoracic spinal cord injury (SCI). Three days and 10 weeks after injury, animals underwent imaging of the contused spinal cord using ultrafast contrast-enhanced ultrasound with a Vantage ultrasound research system in combination with a 15 MHz transducer. Lesion size and signal-to-noise ratios were estimated via transcutaneous, subcutaneous, or epidural ultrasound acquisition through the acoustic window created by the original laminectomy. RESULTS Following laminectomy, transcutaneous and subcutaneous contrast-enhanced ultrasound imaging allowed for assessment of perfusion and vascular flow in the contused rodent spinal cord. An average loss of 7.2 dB from transcutaneous to subcutaneous and the loss of 5.1 dB from subcutaneous to epidural imaging in signal-to-noise ratio (SNR) was observed. The hypoperfused injury center was measured transcutaneously, subcutaneously and epidurally (5.78 ± 0.86, 5.91 ± 0.53, 5.65 ± 1.07 mm2) at 3 days post injury. The same animals were reimaged again at 10 weeks following SCI, and the area of hypoperfusion had decreased significantly compared with the 3-day measurements detected via transcutaneous, subcutaneous, and epidural imaging respectively (0.69 ± 0.05, 1.09 ± 0.11, 0.95 ± 0.11 mm2, p < 0.001). CONCLUSIONS Transcutaneous ultrasound allows for measurements and longitudinal monitoring of local hemodynamic changes in a rodent SCI model.
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