Positive end-expiratory pressure setting based on transpulmonary pressure during robot-assisted laparoscopic prostatectomy: an observational intervention study

JA Clinical Reports

Table 3 Changes in blood gas data during anesthesia

	After induction	Positive-pressure capnoperitoneum and Trendelenburg position					End of surgery
	After induction	PEEP0	PEEP5	PEEP10	PEEP15	PtpEEP0	End of surgery
pH	7.36 [7.35, 7.38]	7.34 [7.32, 7.36]	7.32 [7.31, 7.35]	7.31 [7.29, 7.33]	7.28 [7.27, 7.33]^⁑0	7.28 [7.27, 7.33]^⁑0,*5	7.31 [7.28, 7.34]
PaCO₂ (mmHg)	44 [42, 46]	50 [45, 52]	52 [47, 55]	50 [49, 51]	55 [49, 59]^⁑0,*5	52 [48, 61]	54 [52, 57]
PaO₂ (mmHg)	220 [137, 251]	179 [120, 200]	198 [140, 230]	200 [160, 250]^⁑0	208 [163, 250]^⁑0	211 [162, 236]^⁑0	213 [191, 255]
ETCO₂ (mmHg)	39 [38, 39]	39 [38, 41]	42 [40, 43]	43 [39, 46]	43 [40, 48]	45 [42, 48] ^*0	43 [42, 48]

Data are presented as median values [interquartile range]
PaCO₂ partial pressure of carbon dioxide, PEEP positive end-expiratory pressure
^*0P < 0.05 vs. PEEP0; ^*5P < 0.05 vs. PEEP5; ^⁑0P < 0.01 vs. PEEP0