Physiologic Responses to Infrarenal Aortic Cross-Clamping during Laparoscopic or Conventional Vascular Surgery in Experimental Animal Model: Comparative Study

Table 4

Acid-base balance in pigs anesthetized with sevoflurane, fentanyl, and vecuronium and undergoing aortic cross-clamping through laparotomy (Group I) or laparoscopy with (Group II) or without aortic cross-clamping (Group III).

	pH			CO3H- (mmol/L)
Times	Group I	Group II	Group III	Group I	Group II	Group III
T1	7.48±0.01	7.47±0.01	7.40±0.73	26.7±3.3	31.2±1.1	30.1±0.9
T2	7.43±0.02	7.32±0.07	7.40±0.04	23.1±7.3	27.4±5.7^×	30.0±1.4^×
T3	7.46±0.04	7.27±0.16^*†	7.40±0.5	20.6±4.3	31.2±3.5^×	31.0±1.5^×
T4	7.46±0.05	7.28±0.17^*†	7.40±0.1	26.6±2.3	33.8±2.3^×	30.8±1.3^×
T5	7.40±0.06	7.22±0.18^*†	7.43±0.1	24.1±3.4	29.1±7.1^×	30.3±1.7^×
T6	7.41±0.06	7.34±0.07	7.38±0.6	24.7±3.2	32.8±3.6^×	30.0±1.6^×
T7	7.38±0.01	7.32±0.07	7.34±0.1	21.5±7.6	32.5±4.0^×	30.3±1.6^×

^*Significant changes from baseline (𝑃<.05).
^†Significantly (𝑃<.05) different from values for pigs undergoing laparoscopy and cross-clamping.
^×Significantly (𝑃<.05) different from values for pigs undergoing laparoscopy.