21 May 2026 : Clinical Research
Monitoring Oxygen Metabolism Using the Oxygen Reserve Index in Patients Undergoing Robotic Prostatectomy: A Prospective Observational Study
Małgorzata M. Barud
ABCDEF 1,2*, Bartłomiej P. Turek BEF 2, Dorota Siwicka ACDEFG 1,2
DOI: 10.12659/MSM.952156
Med Sci Monit 2026; 32:e952156
Table 5 Correlation of Trendelenburg position time with selected oxygen metabolism variables.
| Trendelenburg position time | |||
|---|---|---|---|
| n | Rho | P | |
| ORi BEG | 82 | 0.020 | 0.8614 |
| ORi PREOX | 82 | −0.209 | 0.0596 |
| ORi INDUCT | 82 | −0.155 | 0.1635 |
| ORi PP+T | 90 | −0.058 | 0.5857 |
| ORi AFT10 | 91 | −0.049 | 0.6442 |
| ORi AFT30 | 92 | −0.010 | 0.9240 |
| ORi AFT50 | 91 | −0.004 | 0.9686 |
| ORi AFT70 | 86 | 0.033 | 0.7605 |
| ORi ZERO | 89 | 0.117 | 0.2757 |
| ORi EXTUB | 69 | 0.054 | 0.6588 |
| ORi PACU | 70 | −0.083 | 0.4955 |
| G1 PaO (BEG) | 96 | 0.147 | 0.1538 |
| G2 PaO (PP+T) | 96 | −0.046 | 0.6530 |
| G3 PaO (ZERO) | 96 | 0.030 | 0.7689 |
| Correlations between the duration of the Trendelenburg position and the analyzed oxygen metabolism parameters were assessed using Spearman’s rank correlation coefficient. G1 PaO – partial pressure of oxygen in arterial blood before the induction of anesthesia; G2 PaO – partial pressure of oxygen in arterial blood after the patient was placed in the Trendelenburg position; G3 PaO – partial pressure of oxygen in arterial blood after returning the patient to initial position; ORi – oxygen reserve index. Time points: BEG – before induction of anesthesia; PREOX – after pre-oxygenation with 100% oxygen; INDUCT – after induction of anesthesia; PP+T – after placing the patient in the Trendelenburg position and establishing pneumoperitoneum; AFT10 – 10 minutes after PP+T; AFT30 – after 30 minutes; AFT50 – after 50 minutes; AFT70 – after 70 minutes; ZERO – after returning the patient to the initial position; EXTUB – after extubation; PACU – before transferring the patient to the post-anesthesia care unit. | |||