Preliminary Report on Efficacy of Acupuncture versus meToclopramide for Management of Post-Operative Gastroparesis (EAT POSTOP Trial)

Introduction: Gastroparesis is common in intensive care patients and may increase the incidence of malnutrition and nosocomial pneumonia, leading to poorer patient outcomes. Current pharmacotherapy has shown only modest efficacy. Acupuncture without pharmacotherapy has been shown to improve gastroparesis in animal studies and in recent clinical trials. However, no trials studying the efficacy of acupuncture as an adjunctive therapy for surgical intensive care patients have been done. This study aims to evaluate the effectiveness of adding electro-acupuncture therapy to pharmacotherapy in the management of gastroparesis in these patients. Methods: For this prospective block randomised controlled trial, we aim to recruit 200 adult surgical intensive care patients who require gastric enteral nutrition, and mechanical-assisted ventilation, and who have gastroparesis (gastric residual volumes more than 120 mL twice four hours apart). Patients will receive either metoclopramide 20 mg intravenously thrice daily (Group M) or electro-acupuncture comprising four sessions of 30-minute electro-acupuncture at specific sites over 48 hours in addition to intravenous metoclopramide 20 mg thrice daily (Group A). Gastroparesis resolution is defined as 24-hour cumulative gastric residual volumes less than 200 mL. Patients are followed-up for 48 hours from the commencement of therapy. Results: Three patients have been recruited in a four-month period thus far. Two are in Group A and one in Group M. All have met the study definition of gastroparesis resolution. The incidence of gastroparesis in this period among longer stayers in the unit (n = 92) is 8.7%. Conclusions: The trial is on-going. Reasons for the low incidence of gastroparesis are discussed. The study of the use of acupuncture in the treatment of intensive care patients with gastroparesis is worthwhile due to its excellent side-effect profile and if successful, will be a tool to improve nutritional support