肩関節鏡視下手術中の脳血流，脳波の検討−体位による比較−

概要

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The purpose of this study was to investigate whether a difference of surgical position affects cerebral circulation and electrical activity. 19 patients were evaluated. 10 cases with rotator cuff injury underwent arthroscopic rotator cuff repair in beach chair position (BCP), and 9 cases with shoulder anterior instability underwent arthroscopic Bankart repair in lateral decubitus position (LP). Average age of 48.3 years (19-74years) in the BCP group was significantly older than that of 31.6years (16-54years) in the LP group. No significant differences were found in other demographies between the two groups. The change of blood pressure (BP), heart rate (HR), regional cerebral oxygen saturation (rSO2) and spectral edge frequency 95 (SEF95) were measured before and after postural change. In the BCP group Systolic BP, rSO2 and SEF95 significantly decreased. Whereas no significant changes of cerebral circulation and electrical activity were observed in the LP group. No apparent complication associated with postural change was experienced either group. This study suggested that BCP caused subclinical changes of cerebral circulation and brain activity, which was not observed in LP.