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Table 4 Main arterial blood gas parameters of the whole cohort before and after intervention

From: Comparison of low-pressure and standard-pressure pneumoperitoneum laparoscopic cholecystectomy in patients with cardiopulmonary comorbidities: a double blinded randomized clinical trial

Parameter

Pre-intervention (n = 124)

Post-intervention (n = 124)

Difference (95%CI)

P §

pH

7.401(7.320 ~ 7.519)

7.358(7.137 ~ 7.460)

0.047 (0.037 ~ 0.059)

<0.001

PaCO2

38.0(25.0 ~ 56.0)

43.1(27.0 ~ 85.3)

-5.2 (-6.8 ~ -3.6)

<0.001

HCO3

23.7(17.2 ~ 33.9)

24.0(16.5 ~ 33.9)

-0.4 (-1.2 ~ 0.3)

0.28

BE

-0.3(-6.0 ~ 7.5)

-1.1(-6.9 ~ 7.5)

0.6 (-0.1 ~ 1.3)

0.101

  1. HCO3, serum bicarbonate. BE, base excess. §Mann–Whitney U test