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Herajärvi J, Juvonen T. Preparing the spinal cord - priming or preconditioning? A systematic review of experimental studies. Scand Cardiovasc J Suppl 2023; 57:2166100. [PMID: 36660818 DOI: 10.1080/14017431.2023.2166100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Objectives. Paraplegia is devastating complication associated with thoracic and thoracoabdominal aortic aneurysm repair. Vast evidence has been gathered on pre-, peri- and postoperative protective adjuncts aiming to minimize spinal cord ischemia. This review focuses on the pretreatment phase of open surgical or endovascular aortic procedures and gathers the experimental data on the interventional preconditioning and priming methods that increase the spinal cord ischemic tolerance. Design. By the start of March 2021, a systematic review was performed in PubMed, Scopus and Web of Science core collection to identify the articles that reported (i) either an ischemic preconditioning, remote ischemic preconditioning or priming method prior to (ii) experimental spinal cord ischemia performed in endovascular or open surgical fashion mimicking either thoracic, abdominal or thoracoabdominal aortic aneurysm procedures. (iii) The outcomes were reported via neurological, motor-evoked potential, somatosensory-evoked potential, histopathological, immunohistochemical, physiological analysis, or in different combinations of these measurements. Results. The search yielded 7802 articles, and 57 articles were included in the systematic review. The articles were assessed by the evaluated species, the utilized pretreatment, the measured protective effects, and the suggested underlying mechanisms. Conclusions. The reviewed articles showed several possible mechanisms in ischemic and remote ischemic preconditioning for prevention of spinal cord ischemia. The main suggested method for priming was arteriogenetic stimulus. Future studies should confirm these hints of arteriogenetic stimulus with more precise quantification of the protective recruitment process.
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Affiliation(s)
- Johanna Herajärvi
- Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.,Research Unit of Surgery, Anesthesia and Critical Care, University of Oulu, Oulu, Finland
| | - Tatu Juvonen
- Heart and Lung Center, Helsinki University Hospital and University of Helsinki, Helsinki, Finland.,Research Unit of Surgery, Anesthesia and Critical Care, University of Oulu, Oulu, Finland
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Amabile A, Lewis E, Costa V, Tadros RO, Han DK, Di Luozzo G. Spinal cord protection in open and endovascular approaches to thoracoabdominal aortic aneurysms. Vascular 2023; 31:874-883. [PMID: 35507464 DOI: 10.1177/17085381221094411] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Despite advancements in surgical and postoperative management, spinal cord injury has been a persistent complication of both open and endovascular repair of thoracoabdominal and descending thoracic aortic aneurysm. Spinal cord injury can be explained with an ischemia-infarction model which results in local edema of the spinal cord, damaging its structure and leading to reversible or irreversible loss of its function. Perfusion of the spinal cord during aortic procedures can be enhanced by several adjuncts which have been described with a broad variety of evidence in their support. These adjuncts include systemic hypothermia, cerebrospinal fluid drainage, extracorporeal circulation and distal aortic perfusion, segmental arteries reimplantation, left subclavian artery revascularization, and staged aortic repair. The Authors here reviewed and discussed the role of such adjuncts in preventing spinal cord injury from occurring, pinpointing current evidence and outlining future perspectives.
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Affiliation(s)
- Andrea Amabile
- Division of Cardiac Surgery, Department of Surgery, Yale School of Medicine, New Haven, CT, USA
| | - Erin Lewis
- Department of Surgery, Rutgers-New Jersey Medical School, Newark, NJ, USA
| | - Victor Costa
- Department of Surgery, Rutgers-New Jersey Medical School, Newark, NJ, USA
| | - Rami O Tadros
- Division of Vascular Surgery, Department of Surgery, Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Daniel K Han
- Division of Vascular Surgery, Department of Surgery, Mount Sinai Hospital, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Gabriele Di Luozzo
- Department of Cardiovascular Surgery, Icahn School of Medicine at Mount Sinai, New York, NY, USA
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Honkanen HP, Mustonen C, Herajärvi J, Tuominen H, Starck T, Kallio M, Kiviluoma K, Anttila V, Juvonen T. Priming protects the spinal cord in an experimental aortic occlusion model. J Thorac Cardiovasc Surg 2022; 164:801-809.e2. [PMID: 33220965 DOI: 10.1016/j.jtcvs.2020.09.137] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2020] [Revised: 09/23/2020] [Accepted: 09/28/2020] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Paraplegia is a devastating complication in aortic aneurysm surgery. Modifying the spinal cord vasculature is a promising method in spinal cord protection. The aim of this study was to assess whether the spinal cord can be primed by occluding thoracic segmental arteries before simulated aneurysm repair in a porcine model. METHODS Twelve piglets were randomly assigned to the priming group (6) and the control group (6). Eight uppermost thoracic segmental arteries were occluded at 5-minute intervals in the priming group before a 25-minute aortic crossclamp. In the control group, the aorta was crossclamped for 25 minutes. During the first 5 minutes, 8 segmental arteries were occluded. After the aortic crossclamping, piglets were observed under anesthesia for 5 hours and followed up 5 days postoperatively. Near-infrared spectroscopy, motor-evoked potentials, blood samples, neurology with the modified Tarlov score, and histopathology of the spinal cord were assessed. RESULTS The median Tarlov score during the first postoperative day was higher in the priming group than in the control group (P = .001). At the end, 50% of the control animals had paraplegia compared with 0% of paraplegia in the priming group. The mean regional histopathologic score differed between the priming group and the control group (P = .02). The priming group had higher motor-evoked potentials during the operation at separate time points. The lactate levels were lower in the priming group compared with the control group (Pg = .001, Pg×t = .18). CONCLUSIONS Acute priming protects the spinal cord from ischemic injury in an experimental aortic crossclamp model.
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Affiliation(s)
- Hannu-Pekka Honkanen
- Research Unit of Surgery, Anesthesia and Intensive Care, University of Oulu, Medical Research Center, Oulu, Finland.
| | - Caius Mustonen
- Research Unit of Surgery, Anesthesia and Intensive Care, University of Oulu, Medical Research Center, Oulu, Finland
| | - Johanna Herajärvi
- Research Unit of Surgery, Anesthesia and Intensive Care, University of Oulu, Medical Research Center, Oulu, Finland; University Department of Cardiac Surgery, Heart Centre Leipzig, Leipzig, Germany
| | - Hannu Tuominen
- Department of Pathology, Oulu University Hospital, Oulu, Finland
| | - Tuomo Starck
- Research Unit of Medical Imaging, Physics and Technology, Medical Research Center Oulu University of Oulu, Oulu, Finland; Department of Clinical Neurophysiology, Oulu University Hospital, Oulu, Finland
| | - Mika Kallio
- Research Unit of Medical Imaging, Physics and Technology, Medical Research Center Oulu University of Oulu, Oulu, Finland; Department of Clinical Neurophysiology, Oulu University Hospital, Oulu, Finland
| | - Kai Kiviluoma
- Research Unit of Surgery, Anesthesia and Intensive Care, University of Oulu, Medical Research Center, Oulu, Finland
| | - Vesa Anttila
- Heart Center, University of Turku and Turku University Hospital, Turku, Finland
| | - Tatu Juvonen
- Research Unit of Surgery, Anesthesia and Intensive Care, University of Oulu, Medical Research Center, Oulu, Finland; Department of Cardiac Surgery, Heart and Lung Center, Helsinki University Central Hospital, Helsinki, Finland
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Mirza AK, Tenorio ER, Karkkainen JM, Wennberg P, Macedo TA, Oderich GS. Paraspinal muscle claudication after fenestrated-branched endovascular aortic repair of thoracoabdominal aortic aneurysms. JOURNAL OF VASCULAR SURGERY CASES INNOVATIONS AND TECHNIQUES 2020; 6:464-468. [PMID: 32875181 PMCID: PMC7451728 DOI: 10.1016/j.jvscit.2020.07.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Accepted: 07/09/2020] [Indexed: 11/20/2022]
Abstract
Fenestrated-branched endovascular repair of thoracoabdominal aneurysms carries a risk of spinal cord ischemia owing to extensive coverage of intercostal arteries, but other consequences of decreased flow to the paraspinal muscles have not been delineated. We describe a 54-year-old woman treated by multibranched thoracoabdominal aneurysm repair who developed severe disabling exertional thoracic and lumbar back pain after the operation. Despite physical therapy, the patient remains with disabling symptoms at 2 years of follow-up. Transcutaneous oxygen pressures confirmed exercise-induced decrease in oxygen pressure, consistent with decreased muscle perfusion. We propose the term paraspinal muscle claudication to describe these symptoms.
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Affiliation(s)
- Aleem K. Mirza
- Division of Vascular and Endovascular Surgery, Mayo Clinic, Rochester, Minn
| | - Emanuel R. Tenorio
- Division of Vascular and Endovascular Surgery, University of Texas Health Science, Houston, Tex
| | | | - Paul Wennberg
- Division of Vascular Medicine, Mayo Clinic, Rochester, Minn
| | - Thanila A. Macedo
- Department of Radiology, University of Texas Health Science, Houston, Tex
| | - Gustavo S. Oderich
- Division of Vascular and Endovascular Surgery, University of Texas Health Science, Houston, Tex
- Correspondence: Gustavo S. Oderich, MD, Memorial Hermann Medical Plaza, University of Texas Health Science, 6400 Fannin St, Ste 2850, Houston, TX 77030
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