Transcutaneous Electrical Acupoint Stimulation for Prevention of Postoperative Nausea and Vomiting

Study Overview
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Brief Summary
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Postoperative nausea and vomiting(PONV) refers to at least one nausea, retching or vomiting after operation, or any combination of the above symptoms. The incidence of PONV in high-risk patients can reach 61%-79%. PONV can not only cause dizziness and headache, but also cause disturbance of acid-base balance of water and electrolyte, wound dehiscence, formation of incisional hernia, aspiration, and aspiration pneumonia, leading to prolonged hospitalization, increased medical expenses, and reduced surgical satisfaction. At present, the guidelines for prevention and treatment of PONV and the consensus of experts suggest that identifying high-risk patients according to Apfel risk score ≥3 points, reducing baseline PONV risks, and implementing multimodal PONV prophylaxis. However, the incidence of PONV in high-risk patients is still as high as 20% even if 2-3 drugs are combined used for prevention and treatment. It is difficult to further reduce the incidence of PONV by adding different kinds or dosages of drugs, while drug-related side effects are increasing gradually. Acupuncture (electroacupuncture, transcutaneous electrical acupoint stimulationTEAS, transcutaneous electrical nerve stimulation, etc.) is a safe, effective, non-toxic side-effect non-drug treatment method. A large number of studies have confirmed that acupuncture can reduce the incidence of PONV, and it is expected to become an important supplement to drug treatment of PONV, but there are quality defects such as small sample size, inaccurate intervention and so on. At the same time, most acupuncture studies aim to compare the efficacy of PONV with drug therapy, without considering the clinical situation, using acupuncture treatment based on drug standard treatment to further reduce the incidence of PONV, thus limiting the clinical application value of acupuncture. On the basis of standardized drug prevention and treatment of PONV, TEAS will be used to further reduce the incidence of PONV and promote rapid recovery of patients. This study will strongly demonstrate that acupuncture can break through the bottleneck of drug treatment and provide evidence for the application of acupuncture in modern perioperative clinical medicine.

Detailed Description
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This study intends to carry out a high-quality clinical research with design specifications, large sample, multi-center, evaluator blinded, randomized and controlled methods. From September 1, 2019 to October 30, 2020, patients undergoing laparoscopic non-gastrointestinal surgery under general anesthesia will be recruited, based on the combination of dexamethasone and 5-HT3 antagonist, the efficacy of TEAS stimulation Neiguan (P6) and Zusanli (ST36) in the prevention and treatment of PONV will be verified. In TEAS group, bilateral P6 and ST36 TEAS intervention after removal tracheal intubation and on the first day after surgery, a total of 2 times, 30 minutes each time, 2/10 Hz low frequency sparse wave, 6-9 mA. The patients will be given maximum intensity stimulation at all points during the intervention.To ensure the blindness of the evaluator, the time of evaluation will be on the afternoon of the first and the second day, and the 30 days after the operation, and three evaluations will be made. The main indicators are the incidence of PONV 24 hours after operation, and the secondary indicators are the quantitative indicators of PONV and the indicators of rapid recovery after operation.

Official Title
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Transcutaneous Electrical Acupoint Stimulation for Prevention of Postoperative Nausea and Vomiting: a Multicenter, Evaluator-Blind, Randomized and Controlled Study

Conditions
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Postoperative Nausea and Vomiting

Intervention / Treatment
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* Device: TEAS
* Device: TEAS without electrical stimulation


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Age 18-50 years old, BMI 15 40kg/m2, ASAI-III; Laparoscopic non-gastrointestinal surgery under general anesthesia; Postoperative Nausea and Vomiting Apfel ≥3; Understand and sign an informed consent form and cooperate with the intervention and evaluation; Exclusion Criteria: Pregnancy, lactation period; Taboos of transcutaneous electrical stimulation: skin allergy, damage, infection and itching at test acupoints; allergy to tape; pacemaker implanter; Identify/discriminate a history of alcohol, opioids or other drugs abuse; Admission to ICU after surgery; Participation in other clinical studies within 3 months before admission to this study;

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Prevention
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Sham Comparator: Control Group<br>Same as TEAS group but without electrical stimulation | Device: TEAS without electrical stimulation<br>* Bilateral Neiguan and Zusanli acupuncture points, with no electrical stimulation<br>|
| Experimental: TEAS Group<br>Bilateral Neiguan and Zusanli acupuncture points, 2/10Hz Dense wave , 6-9mA,30min | Device: TEAS<br>* Bilateral Neiguan and Zusanli acupuncture points, 2/10Hz Dense wave , 6-9mA,30min<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Incidence of PONV within 24 hours | Whether or not nausea or vomiting happens | 24 hours after surgery | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| The first nausea | the time point of the first nausea. | 24 hours after surgery | 
| The first nausea's Visual Analogue Scale | the Visual Analogue Scale of the first nausea : the Visual Analog Scale (VAS) is a 10 cm line with anchor statements ，on the left (no nausea) and on the right (extreme nausea). The patient is asked to mark their current nausea level on the line. The examiner scores the VAS by measuring the distance in either centimeters (0 to 10) or millimeters (0 to 100) from the no nausea anchor point. | 24 hours after surgery | 
| The first vomiting | the time point the first vomiting | 24 hours after surgery | 
| The first vomiting's Visual Analogue Scale | the Visual Analogue Scale of the first vomiting : the Visual Analog Scale (VAS) is a 10 cm line with anchor statements ，on the left (no vomitting) and on the right (extreme vomiting). The patient is asked to mark their current vomiting level on the line. The examiner scores the VAS by measuring the distance in either centimeters (0 to 10) or millimeters (0 to 100) from the no vomiting anchor point. | 24 hours after surgery | 
| Total nausea frenquency in postoperative 24 hours | the total nausea times of the subjects | 24 hours after surgery | 
| The Visual Analogue Scale of nausea in postoperative 24 hours | the Visual Analogue Scale of nausea in postoperative 24 hours : the Visual Analog Scale (VAS) is a 10 cm line with anchor statements ，on the left (no nausea) and on the right (extreme nausea). The patient is asked to mark their current nausea level on the line. The examiner scores the VAS by measuring the distance in either centimeters (0 to 10) or millimeters (0 to 100) from the no nausea anchor point. | 24 hours after surgery | 
| Total vomiting frenquency in postoperative 24 hours | the total vomiting times of the subjects | 24 hours after surgery | 
| The Visual Analogue Scale of vomiting in postoperative 24 hours | the Visual Analogue Scale of vomiting in postoperative 24 hours : the Visual Analog Scale (VAS) is a 10 cm line with anchor statements ，on the left (no vomitting) and on the right (extreme vomiting). The patient is asked to mark their current vomiting level on the line. The examiner scores the VAS by measuring the distance in either centimeters (0 to 10) or millimeters (0 to 100) from the no vomiting anchor point. | 24 hours after surgery | 
| 40-itemquality of recovery score | The quality of postoperative life recovery was assessed by questionnaire. The content mainly included five aspects, physical comfort (12 items), emotional state (9 items), physical independence (5 items), psychological support (7 items) and pain (7 items). | 24 hours after surgery | 
| Postoperative PONV complications | The incidence of dizziness, headache, electrolyte imbalance, aspiration, aspiration pneumonia, and wound dehiscence | 30 days after surgery | 
| Postoperative hospital stay | The interval between the date of discharge and the date of surgery. | 30 days after surgery | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Postoperative Nausea and Vomiting;TEAS