Abstract
In our previous study, hypokalemia incidence was high in patients scheduled for laparoscopic colorectal resection. This trial was conducted to verify the effects of preoperative carbohydrate drinks containing potassium in these patients. A three-arm randomized controlled design was used. Patients were randomly assigned to control, placebo, and treatment groups. In the control group, patients fasted from midnight. In the placebo group, patients fasted from midnight and received carbohydrate drinks 2 to 3 hours before surgery. In the treatment group, patients fasted from midnight and received carbohydrate drinks containing potassium supplementation 2 to 3 hours before surgery. The primary outcome was the incidence and severity of preoperative hypokalemia. Other outcomes included postoperative gastrointestinal function, including the time to postoperative first flatus (FFL) and first feces (FFE), and other complications. The final analysis included 122 participants. The incidence of preoperative hypokalemia in the treatment group was significantly lower than that in the control and placebo groups (50% vs 88.1% vs 77.5%, P < .001). The severity of hypokalemia in the control and placebo groups was greater than that in the treatment group. No regurgitation or aspiration occurred in the three groups. No significant differences were observed among the three groups regarding time to FFL and FFE. Preoperative carbohydrate drinks containing potassium significantly reduced the incidence of preoperative hypokalemia and improved preoperative thirst and hunger, but did not reduce the postoperative time to FFL and FFE or length of hospital stay. However, as part of the enhanced recovery after surgery protocol, preoperative carbohydrate drinks containing potassium should be considered, as early as first admittance to hospital.
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