Does TEAS at PC6 reduce postoperative nausea and vomiting within 24 hours after hepatectomy?
Postoperative nausea and vomiting (PONV) is a common complication after liver surgery (hepatectomy). Transcutaneous electrical acupoint stimulation (TEAS) at the PC6 acupoint (on the wrist) has been studied for preventing PONV in other surgeries. However, a 2024 multicenter randomized trial specifically in hepatectomy patients found that adding TEAS at PC6 to a standard antiemetic regimen did not significantly lower the rate of PONV within the first 24 hours after surgery 4.
What the research says
A 2024 multicenter double-blind trial randomly assigned 161 hepatectomy patients to receive either TEAS at PC6 during surgery or no stimulation, in addition to a standard double-antiemetic regimen. The incidence of PONV within 24 hours was 23.8% in the TEAS group versus 26.6% in the control group, a difference that was not statistically significant (odds ratio 0.86, 95% CI 0.42-1.76) 4. This suggests that for patients already receiving antiemetic drugs, adding TEAS at PC6 does not provide extra benefit for preventing early PONV after hepatectomy.
In contrast, a large meta-analysis of 33 studies (over 6,000 patients) found that TEAS reduced PONV within 24 hours after laparoscopic surgery overall (risk ratio 0.52, 95% CI 0.46-0.58) 3. However, that analysis included many types of laparoscopic procedures, not specifically hepatectomy. The hepatectomy trial's negative result may reflect differences in surgery type, antiemetic regimen, or stimulation protocol 4.
Other research on TEAS for PONV has shown mixed results depending on the timing and number of stimulation periods. A 2025 trial in gynecologic laparoscopy found that multi-period TEAS (applied before and after surgery) reduced nausea frequency and severity more than single-period TEAS or no stimulation 6. A wearable TEAS bracelet is also being studied for treating PONV after it occurs 7. But these findings may not apply directly to hepatectomy patients.
The hepatectomy trial did note a potential benefit: patients in the TEAS group used fewer patient-controlled analgesia (PCA) attempts and deliveries in the first 24 hours (2.7 vs 3.5 attempts), indicating less need for pain medication 4. This could be relevant because opioids can worsen nausea. However, the primary outcome of PONV incidence was not improved.
What to ask your doctor
- What antiemetic medications will I receive during and after hepatectomy to prevent nausea and vomiting?
- Given the trial results, would TEAS at PC6 offer any benefit for my recovery, such as reducing painkiller use?
- Are there other non-drug approaches (like acupressure or different acupoint stimulation) that might help prevent PONV after liver surgery?
- How will my pain be managed after hepatectomy, and could that affect my risk of nausea?
- Should I be concerned about PONV even if I am at low risk, and what rescue treatments are available?
This question is drawn from common patient questions about this topic and answered using cited medical research. We do not provide individualized advice.