A Clinical Study on Vagus Nerve Blockade at the Gastroesophageal Junction Combined With Tegileridine in the Very Early Postoperative Recovery Following Bariatric Surgery

November 10, 2026 updated by: Yang Bin, The First Affiliated Hospital of Xiamen University

This study aims to investigate, through a prospective randomized controlled clinical trial, the clinical value of vagal nerve block at the gastroesophageal junction combined with tizanidine in the very early postoperative recovery following bariatric surgery. Patients who have undergone bariatric surgery often experience visceral pain due to the inflammatory response triggered by partial gastrectomy. Conventional analgesic regimens have limited efficacy in controlling this type of visceral pain, whereas vagus nerve block at the gastroesophageal junction can directly block the transmission of pain signals from this region, thereby specifically alleviating visceral pain; the combined use of tegileridine could reduce postoperative opioid dosage and lower the risk of related adverse reactions. By comparing these two different analgesic regimens, this study examines their effects on patients' postoperative pain intensity, early mobilization, and adverse reactions such as respiratory depression, nausea, vomiting, and constipation. This study aims to clarify the efficacy and safety of this combined regimen in precisely relieving visceral pain, optimizing perioperative analgesia, reducing opioid-related complications, alleviating gastrointestinal adverse reactions, promoting early ambulation, and accelerating recovery, thereby providing clinical evidence for the establishment of a more comprehensive and individualized multimodal analgesia and Enhanced Recovery After Surgery (ERAS) system for bariatric surgery.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
86

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Not Applicable

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

18 years to 70 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Aged 18 to 70 years, regardless of gender;
  • BMI meets the clinical criteria for bariatric surgery;
  • ASA physical status classification I-II;
  • Scheduled to undergo laparoscopic sleeve gastrectomy or gastric bypass surgery;
  • Fully understands the details of this study, voluntarily agrees to participate, and has signed a written informed consent form

Exclusion Criteria:

  • Contraindications for regional nerve block procedures (e.g., coagulation disorders, infection at the puncture site, etc.);
  • Allergy to local anesthetics, tizanidine, or opioids;
  • Severe cardiac, pulmonary, hepatic, or renal dysfunction;
  • History of chronic pain or long-term use of opioid analgesics prior to surgery;
  • Pregnant or breastfeeding women;
  • Mental illness or cognitive impairment that prevents the participant from cooperating with pain scoring and other assessments;
  • Other circumstances deemed by the investigator to make the participant unsuitable for participation in this study;

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Prevention
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Active Comparator: The control group

Bilateral transverse abdominal plane block and intravenous administration of Tegileridine
Procedure: Bilateral Transversus Abdominis Plane Block (TAPB) and Intravenous infusion of Tegileridine.

Bilateral Transversus Abdominis Plane Block (TAPB): Ultrasound-guided TAPB, 20 mL of 0.25% ropivacaine on each side. Intravenous infusion of 1 mg of Tegileridine.
Experimental: The experimental group

Bilateral transverse abdominal plane block and intravenous administration of Tegileridine combined with the vagus nerve block at the gastroesophageal junction
Procedure: Bilateral transverse abdominal plane block and intravenous administration of Tegileridine combined with the vagus nerve block at the gastroesophageal junction

Bilateral Transversus Abdominis Plane Block (TAPB): Ultrasound-guided TAPB, 20 mL of 0.25% ropivacaine on each side. Intravenous infusion of 1 mg of Tegileridine. Vagus nerve block at the gastroesophageal junction: Under direct laparoscopic visualization, locate the vagus nerve trunks on both sides of the gastroesophageal junction and inject 3 mL of 0.33% ropivacaine into each side.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Visual analogue scale (VAS) Score
Time Frame: postoperative 0, 2, 6, 12, and 24 hours

The VAS score refers to drawing a 10-cm scale on a piece of paper. One end of the scale is marked as 0, indicating no pain; the other end is marked as 10, indicating severe pain; the values in between represent different degrees of pain.
postoperative 0, 2, 6, 12, and 24 hours

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Quality-of-Recovery 15 (QoR-15) Score
Time Frame: postoperative 1 day

The QoR-15 includes 5 items related to physical comfort, 4 items regarding emotional state, 2 items concerning self-care ability, 2 items related to psychological support, and 2 items about pain. There are a total of 15 subjective parameters. Each item is scored on a scale of 0 to 10. The total score of QoR-15 ranges from 0 to 150. The higher the score, the better the condition.
postoperative 1 day
Incidence of postoperative respiratory depression
Time Frame: postoperative 1, 2, 3 days

Postoperative respiratory depression is defined as a sustained (>1 minute) decrease in oxygen saturation to <90%, or a respiratory rate of <8 breaths per minute, or a decrease in oxygen saturation to <94% accompanied by a respiratory rate of <10 breaths per minute, requiring supplemental oxygen to maintain oxygen saturation (SpO₂) >94%, and in the absence of obvious upper airway obstruction.
postoperative 1, 2, 3 days
Rescue analgesia rate
Time Frame: postoperative 1, 2, 3 days
postoperative 1, 2, 3 days
Total dose of sufentanil for rescue analgesia
Time Frame: postoperative 1, 2, 3 days
postoperative 1, 2, 3 days
Time of first ambulation
Time Frame: postoperative 1, 2, 3 days
postoperative 1, 2, 3 days
Total Hospital Stay
Time Frame: postoperative 7 days
postoperative 7 days
Adverse effects
Time Frame: postoperative 1, 2, 3 days
postoperative 1, 2, 3 days

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
The First Affiliated Hospital of Xiamen University

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
November 15, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
March 15, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
September 30, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
November 1, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 10, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
November 12, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
November 12, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
November 10, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
November 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • FirstAHXiamenU-YB-5

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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