STABLE INTRAOPERATIVE PULSE OXIMETRY VALUES DO NOT PROTECT AGAINST A DECREASE IN REGIONAL CEREBRAL OXYGEN SATURATION IN PATIENTS UNDERGOING PRIMARY HIP ARTHROPLASTY. A PILOT STUDY

Background and Study objective: Continuous perioperative monitoring of blood oxygen saturation via pulse oximetry is an established standard care. The incidence postoperative cognitive dysfunction (POCD) in orthopedic patients higher when compared to any other group hospitalized patients. Although its etiology remains unclear, factors such as thromboembolic complications may play a role. Thromboembolic material, including that released from the surgery site, enters bloodstream then travels brain. decrease flow involved cerebral vessels saturation. Considering this, we decided determine if regional monitored by near-infrared spectroscopy corresponds with readings who underwent primary total hip arthroplasty. Methods: A 20 scheduled for elective arthroplasty were enrolled study. All procedures performed under spinal anesthesia intravenous sedation. Monitoring (rSO2) was carried out time initiation until end surgery, using method. In all, 15 analyzed. Results Conclusions: We found following: (1) rSO2 values decreased continuously over (2) value changes not related mean arterial pressure variations or hemoglobin analyzed oximetry.