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Figure 1: Mean forced vital capacity (FVC) at different time interval during the 24-h study period. Bars indicate standard error of mean (SEM). At 2, 8 and 24 hrs postoperatively signifi cant reduction in FVC was observed compared to baseline only in IVPCA group. *indicate P < 0.05 from the baseline (pair t test), within group comparisons

Figure 1: Mean forced vital capacity (FVC) at different time interval during the 24-h study period. Bars indicate standard error of mean (SEM). At 2, 8 and 24 hrs postoperatively signifi cant reduction in FVC was observed compared to baseline only in IVPCA group. *indicate P < 0.05 from the baseline (pair t test), within group comparisons