Effect of electrical stimulation for chemotherapy-induced nausea and vomiting in patients with liver cancer.

This study will be proposed for assessing the effects of electrical stimulation (ES) for chemotherapy-induced nausea and vomiting (CINV) in patients with liver cancer (LC).We will identify the relevant literatures of ES for CINV in patients with LC from following databases: Cochrane Library, PUBMED, EMBASE, Web of Science, the Cumulative Index to Nursing and Allied Health Literature, the Allied and Complementary Medicine Database, Chinese Biomedical Literature Database, and China National Knowledge Infrastructure from inception to the date of literature searched without any language restrictions. Randomized controlled trials and case-control studies on assessing of effects and safety of ES for CINV in patients with LC will be included. Methodological quality for all included studies will be assessed by using Cochrane risk of bias tool. RevMan 5.3 software (Cochrane Community, London, UK) will be used to analyze the data.This study will summarize current evidence for ES on CINV in patients with LC. Primary outcome includes symptoms severity. Secondary outcomes consist of appetite, performance status, health-related quality of life, and adverse events.The results of this study will provide latest evidence to judge the effects and safety for ES on CINV in patients with LC.PROSPERO CRD42019126379.