Suggested Electroacupuncture for Postoperative Nausea and Vomiting: A Comprehensive Meta-Analysis and Systematic Review of Randomized Controlled Trials

Zhenxu Han ^1AB , Xi Zhang ^1CE , Huan Yang ^2BC , Ping Yuan ^2CDF , Huanyuan Wang ^3CF , Guangzhong Du ^3AG*

DOI: 10.12659/MSM.941262

Med Sci Monit 2023; 29:e941262

Table 2 Details of interventions.

Authors, years	Time point	Time of treatment	Acupoints	Frequency
Chen,2018	Once daily for 7 consecutive days	30 min	ST34, SP10, SP9, ST36, ST40, GB40 (on the operation side)^*	2 Hz/100 Hz disperse-dense wave; 2~5 mA, intensity of tolerable level
Fang 2022	Thirty min prior to the end of the operation	30 min	Neimadian1 and ST361	2 Hz/100 Hz disperse-dense wave; 1mA
Li 2017	24h before surgery	30 min	Bilateral PC6 and ST36^*	20–100 Hz dense-disperse mode; intensity of tolerable level
Park 2022	1 h before and 6 h after surgery	30 min	ST36 and PC6^*	25 Hz, continuous wave type, 6–8V
Qu 2020	30 min before surgery and 4, 22, 34, 46h after surgery	30 min	ST36, PC6, ST37^*	10 Hz 5mA
Praveena 2016	Intraoperatively till the end of the surgery	149.06±42.64 min^**	PC6 and LI4^*	2 Hz, continuous wave, level 1
Tong 2022	Day before operation;day of operation;both day before operation and the day of operation	30 min	HT7, PC6, GV29, DU20; bilateral LI 4, PC 6, and ST 34^*	2 Hz, continuous wave type; intensity of tolerable level
Zhu 2022	The day before surgery; 30 min before surgery; both the day and 30 min before surgery	30 min	PC6 and ST36^*	20–100 Hz dense-disperse mode; intensity of tolerable level
^* Electroacupuncture points; ^** started intraoperatively till the end of the surgery.