Association between Preoperative Free Oral Liquid Intake and Intraoperative Dehydration for Elective Digestive Surgery

Abstract

Purpose: We investigated the current situation of oral fluid intake and association between preoperative free oral liquid intake and intraoperative dehydration for elective digestive surgery.
Patients and Methods: Thirty-eight patients who were to undergo elective digestive surgery were allowed to drink clear fluid freely for up to 3 hours before the induction of anesthesia. We assessed the association between the volume of their fluid intake and several perioperative dehydration factors.
Results: Median volume of fluid intake and urinary specific gravity were 750 (20-2050) mL and 1.010(1-1.030), respectively. They were assigned to two groups according to the volume of fluid intake: “L group: under 10 mL/kg” and “H group: over 10 mL/kg”. High urinary specific gravity was seen more frequently in the L group (p=0.0088), and their intraoperative urine volume was significantly decreased (p=0.019).
Conclusion: The results suggest an association between preoperative free oral liquid intake and intraoperative hydration for elective digestive surgery.