NDLI: Cerebral oxygenation using near-infrared spectroscopy in the beach-chair position during shoulder arthroscopy under general anesthesia.

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Cerebral oxygenation using near-infrared spectroscopy in the beach-chair position during shoulder arthroscopy under general anesthesia.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Pant, Sushil Bokor, Desmond J. Low, Adrian K.
Description	Author Affiliation: Pant S ( Department of Orthopaedic Surgery, Sydney Adventist Hospital and University of Sydney, New South Wales, Australia. Electronic address: sushpant@gmail.com.); Bokor DJ ( Department of Orthopaedic Surgery, Macquarie University, New South Wales, Australia.); Low AK ( Department of Orthopaedic Surgery, Sydney Adventist Hospital and University of Sydney, New South Wales, Australia)
Abstract	PURPOSE: To examine the risks of shoulder arthroscopy in the beach-chair position (BCP) as opposed to the lateral decubitus position. The challenge during general anesthesia, particularly with the patient in the BCP, has been to ascertain the lower limit of blood pressure autoregulation, correctly measure mean arterial pressure, and adequately adjust parameters to maintain cerebral perfusion. There is increasing concern about the BCP and its association with intraoperative cerebral desaturation events (CDEs). Assessment of CDEs intraoperatively remains difficult; the emerging technology near-infrared spectroscopy (NIRS) may provide noninvasive, inexpensive, and continuous assessment of cerebral perfusion, offering an 'early warning' system before irreversible cerebral ischemia occurs. METHODS: A systematic review was undertaken to determine the incidence of intraoperative CDEs as measured by NIRS and whether it is possible to risk stratify patients for intraoperative CDEs, specifically the degree of elevation in the BCP. RESULTS: Searching Medline, Embase, and the Cochrane Central Register of Controlled Trials from inception until December 30, 2013, we found 9 studies (N = 339) that met our search criteria. The Level of Evidence was III or IV. CONCLUSIONS: There remains a paucity of high-level data. The mean incidence of CDEs was 28.8%. We found a strong positive correlation between CDEs and degree of elevation in the BCP (P = .056). Emerging evidence (Level IV) suggests that we may be able to stratify patients on the basis of age, history of hypertension and stroke, body mass index, diabetes mellitus, obstructive sleep apnea, and height. The challenge remains, however, in defining the degree and duration of cerebral desaturation, as measured by NIRS, required to produce measureable neurocognitive decline postoperatively. LEVEL OF EVIDENCE: Level IV, systematic review of Level III and IV studies.
File Format	HTM / HTML
ISSN	07498063
Issue Number	11
Volume Number	30
e-ISSN	15263231
Journal	Arthroscopy: The Journal of Arthroscopic & Related Surgery
Language	English
Publisher	Elsevier
Publisher Date	2014-11-01
Publisher Place	United States
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Brain Anesthesia, General Brain Ischemia Patient Positioning Humans Middle Aged Male Review Discipline Orthopedic Surgery Epidemiology Journal Article Arthroscopy Etiology Surgery Adult Female Physiology Spectroscopy, Near-infrared Adverse Effects Oxygen Consumption Cerebrovascular Circulation Metabolism Hypotension Shoulder Joint Aged Methods
Content Type	Text
Resource Type	Article
Subject	Orthopedics and Sports Medicine Sports Science

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