Systematic review of near infrared spectroscopy during shoulder surgery.

The aim: To evaluate the worth of near infrared spectroscopy during shoulder surgery. Objects: 4. To analyse and systematize the literature where is shown the data of changes of cerebral oxygen saturation and mean arterial blood pressure during shoulder surgery. 5. To determine the changes of cerebral oxygenation and mean arterial blood pressure during shoulder surgery. 6. To determine the correlation between rSO₂ and MAP during shoulder surgery. Methods: This review was performed using MEDLINE/ PubMed database for data published from 2007 until 2016. Keywords: ,,NIRS or near infrared spectroscopy“ and ,,shoulder surgery“ [MeSH Terms]. Inclusion criteria were intraoperative NIRS determined rSO₂ and MAP in adult patients undergoing shoulder surgery under anaesthesia in the beach chair position. Results: After screening there was included 7 studies where rSO₂ by NIRS and MAP were recorded at least 3 times during operation. It was performed a systematic analysis of data and determined possitive correlation between rSO₂ and MAP at the end of surgery (r=0,593), (p=0,044). Conclusions: It was determed that values of rSO₂ and MAP are changing during shoulder surgery in beach chair position. During cerebral desaturation episodes MAP value is lower than minimum margin of cerebral autoregulation. However, the statistically significant relationship between rSO₂ and MAP wasn‘t determined. Statistically significant correlation between rSO₂ and MAP was determined at the end of shoulder surgery by the Kendall τ-b (r=0,593), p