Monitoring Oxygen Metabolism Using the Oxygen Reserve Index in Patients Undergoing Robotic Prostatectomy: A Prospective Observational Study

21 May 2026 : Clinical Research

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

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Table 3 Comparison of SVV and etCO2 parameters for the individual measurement points.

	Measurement points							P
	INDUCT	PP+T	AFT10	AFT30	AFT50	AFT70	ZERO
	Median [IQR]
SVV	14 [–]¹¹	10 [–]⁸	12 [–]¹⁰	13 [–]¹¹	13 [–]¹²	14 [–]¹²	11 [–]⁸	<0.0001
etCO	35 [34–36.5]	35 [34–37]	35 [34–36.5]	37 [35.5–39]	36.5 [35–38.5]	37 [36–39]	38 [36–40]	<0.0001
Comparisons of SVV and etCO values between subsequent measurement points were performed using nonparametric analysis of Friedman’s test with post hoc analysis. The data are presented as median and interquartile range [IQR]. SVV – stroke volume variation; etCO – end-tidal carbon dioxide. Time points: 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.

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