Abstract
Background:
Near-infrared spectroscopy (NIRS) has been developed to monitor cerebral oxygenation. Various studies have investigated its utility in measuring somatic tissue oxygenation and in noncardiac surgeries.
Aims:
The aim of this study was to determine the effect of pneumoperitoneum on the abdominal wall.
Study Design:
A prospective, case-control study.
Methods:
This study included 70 patients who had elective laparoscopic cholecystectomy. A regional oximetry sensor was placed on the anterior abdominal wall in all patients. Primary outcome measures included preoperative regional tissue saturation (rSO2) values. For secondary outcome measures, we recorded visual analogue scale (VAS) scores and tramadol usage at postoperative hours 2, 6, 12, and 24: intraoperative end-tidal CO2 values; peripheral oxygen saturation (spo2); and abdominal subcutaneous fat tissue thickness.
Results:
The initial rSO2 value (T1: 75.6 ± 6.64) was significantly higher than those measured at the predetermined time intervals during pneumoperitoneum (T4: 73.4 ± 6.3, T5: 68 ± 8.9, T6: 68 ± 8.9, T7: 66.6 ± 9.4, T8: 65.81 ± 10.2, T9: 65.6 ± 8.8) (P < .05). The mean change in rSO2 between preoperative measurements (T1) and mid-pneumoperitoneum measurements (T8) was −12.9 ± 11%. This change was found to be negatively correlated with postoperative VAS scores and 24-hour tramadol consumption amounts.
Conclusion:
The results of the present study show that changes in abdominal wall tissue oxygenation during pneumoperitoneum can be measured with NIRS.
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