Purpose: Oral carbohydrate consumption before surgery improves insulin sensitivity, cardiac output and well-being, and shortens hospital stays without adverse effects. No work has compared higher-dose carbohydrate beverages made for preoperative consumption to common, commercial oral rehydration solutions with lower carbohydrate concentrations.
Methods: We recruited low-risk women undergoing scheduled cesarean deliveries with planned spinal anesthesia. Participants were randomized to one of three groups: those who consumed Clearfast beverage, those who consumed Gatorade Thirst Quencher beverage, or fasting control. Participants in the two beverage groups received 710 mL of the appropriate beverage the night before surgery and 355 mL 2 h before surgery. Participants in the control group fasted after midnight the night before surgery. Two hours before surgery, we recorded baseline patient well-being using visual analogue scales, followed by beverage consumption for subjects in the beverage groups. One hour later, we repeated the same assessment. Additional recorded measures included cord blood glucose level, intraoperative variables, breastfeeding success, and a quality of recovery assessment administered 1 day after surgery.
Results: Forty-seven patients were recruited: 15 received Clearfast, 17 received Gatorade Thirst Quencher, and 15 patients fasted after midnight. Group differences in change in patient well-being using visual analog scales were analyzed using linear regression. Both beverage-consuming groups showed significant improvements in patient well-being using visual analog scales while fasted patients showed no change.
Conclusion: Either a common oral rehydration beverage or a higher-dose carbohydrate beverage consumed preoperatively resulted in superior well-being compared to fasting. No differences in other outcomes were noted.
Trial Registration: This study was registered on ClinicalTrials.gov with clinical trial registration number: NCT02684513.
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