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Retzius-Sparing Robot-Assisted Radical Prostatectomy
Published on: May 19, 2022
Monitoring Oxygen Metabolism Using the Oxygen Reserve Index in Patients Undergoing Robotic Prostatectomy: A
Małgorzata M Barud1,2, Bartłomiej P Turek2, Dorota Siwicka1,2
1Department of Anesthesiology and Intensive Care, Medical University in Lublin, Lublin, Poland.
Summary
The oxygen reserve index (ORi) closely correlates with arterial oxygen levels (PaO2) during robot-assisted prostatectomy. This non-invasive tool shows promise for optimizing oxygen management and detecting hyperoxia in anesthesia.
Area of Science:
- Anesthesiology
- Physiology
- Medical Technology
Background:
- The oxygen reserve index (ORi) complements standard pulse oximetry (SpO₂) for predicting hypoxia and detecting hyperoxia.
- Intraoperative oxygen metabolism monitoring is crucial, especially during procedures involving altered ventilation.
Purpose of the Study:
- To analyze intraoperative oxygen metabolism using ORi and PaO₂.
- To evaluate ORi's utility under Trendelenburg tilt and pneumoperitoneum during robot-assisted prostatectomy.
Main Methods:
- 100 adult patients undergoing elective robotic prostatectomy were monitored.
- ORi was measured at 10 time points.
- Arterial blood gas analyses determined PaO₂ at three key stages: pre-anesthesia, post-Trendelenburg, and post-procedure.
Main Results:
- A significant positive correlation was found between ORi and PaO₂ before anesthesia (Rho=0.410) and after Trendelenburg positioning (Rho=0.521).
- No correlation was observed between ORi/PaO₂ and the duration of Trendelenburg or pneumoperitoneum.
Conclusions:
- ORi demonstrates a strong correlation with PaO₂ and effectively detects hyperoxia.
- ORi may serve as a valuable non-invasive tool for intraoperative oxygen management.
- Further research is warranted for ORi's role in detecting hypoxia under steep Trendelenburg and pneumoperitoneum.
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