Oxygen therapy is the most common treatment modality for patients with hypoxemia, but target values for normoxemia are not clearly defined. Therefore, iatrogenic hyperoxemia is a very common situation. Even though there are many side effects reported related to hyperoxemia and hyperoxemia is shown to be related to worse outcome than expected; clinicians still observe hyperoxemia frequently.
Oxygen reserve index (ORiâ„¢) (Masimo Corp., Irvine, USA) can guide clinicians in detection of hyperoxia. ORi is a parameter which can evaluate partial pressure of oxygen (PaO2) rating from 0 to 1. There are growing evidences in ORi that it might be helpful to reduce hyperoxia in general anesthesia. Continuous ORi monitoring can be used for detecting and preventing hyperoxia. The ability to perform FiO2 titration with ORi may be an appropriate monitoring management to prevent the harmful effects of hyperoxia.In this study, in patients who underwent major abdominal surgery; It was aimed to investigate the effectiveness of ORi-guided FiO2 titration in preventing hyperoxia.
Who can participate
Age range65 Years
SexALL
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Inclusion criteria
✓. Patients aged 65 and older
✓. Patients expected to have surgery lasting more than 2 hours
✓. Patients with ASA (American Society of Anesthesiologists) classification 1-2-3-4
✓. Patients planned to have at least 2 days of postoperative hospitalization
Exclusion criteria
✕. Patients with preoperative central nervous system disorders or dementia
✕. Patients with MMSE (Mini-Mental State Examination) scores of 23 or below
✕. Patients unable to communicate
✕. Emergency surgeries
✕. Patients who refuse to participate in the study