Ultrasound-Guided Versus Laparoscopy-Guided Transversus Abdominis Plane Block for Postoperative Analgesia (US-LTAP)

January 18, 2026 updated by: Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital

Comparison of the Efficacy of Ultrasound-Guided and Laparoscopy-Guided Transversus Abdominis Plane(TAP) Block on Postoperative Analgesia in Patients Undergoing Laparoscopic Upper Abdominal Surgery

This prospective, randomized, double-blind study aimed to compare the effects of ultrasound-guided versus laparoscopy-guided transversus abdominis plane(TAP) block on postoperative analgesia in patients undergoing laparoscopic upper abdominal surgery under general anesthesia. Postoperative pain scores, analgesic consumption and recovery parameters were evaluated during the first 24 hours after surgery.

Study Overview

Status

Completed

Conditions

Intervention / Treatment

Detailed Description

Patients aged 18-70 years with ASA physical status I-III who were scheduled for laparoscopic upper abdominal surgery under general anesthesia were included in the study. After induction of anesthesia, patients were randomly assigned to one of two group, bilateral subcostal transversus abdominis plane block was performed under ultrasound-guidance using a local anesthetic mixture before extubation. In the laparoscopy-guided group, bilateral subcostal transversus abdominis plane block was performed under laparoscopic guidance using the same local anesthetic mixture before abdominal closure. Postoperative pain intensity was assessed by using the Numeric Rating Scale (NRS). Total opioid consumption, time to first analgesic requirement, paracetamol consumption, postoperative nausea and vomiting, length of hospital stay, time to ambulation and time to gastrointestinal recovery were recorded during the first 24 hours after surgery. Complications related to the TAP block were also evaluated.

Study Type

Interventional

Enrollment (Actual)

60

Phase

  • Not Applicable

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • Turkey (Türkiye)
    • Istanbul
      • Istanbul, Istanbul, Turkey (Türkiye), 34000
        • Maltepe University Faculty of Medicine Hospital

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

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Patients aged 18-70 yeras
  • ASA physical status I-III
  • Scheduled for laparoscopic upper abdominal surgery
  • Provided written informed consent

Exclusion Criteria:

  • Patient refusal
  • Allergy to local anesthetics
  • Coagulopathy
  • Infection at the injection site
  • Severe systemic disease
  • ASA physical status IV-V

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: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Ultrasound-guided TAP block (Group U)
Patients receiving ultrasound-guided subcostal transversus abdominis plane block for postoperative analgesia.
Procedure: Ultrasound-guided Transversus Abdominis Plane (US-TAP) Block
Bilateral ultrasound-guided subcostal transversus abdominis plane block performed prior to extubation using a total of 40 mL local anesthetic solution (30 mL0.25% bupivacaine and 10 ml of 1% lidocaine).
Experimental: Laparoscopy-guided TAP block (Group L)
Patients receiving laparoscopy-guided transversus abdominis plane block for postoperative analgesia.
Procedure: Laparoscopy-guided Transversus Abdominis Plane (LS-TAP) Block
Bilateral laparoscopy-guided transversus abdominis plane block performed prior to extubation using a total of 40 mL local anesthetic solution (30 mL 0.25% bupivacaine and 10 ml of 1% lidocaine).

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Postoperative pain score (NRS)
Time Frame: First 24 hours postoperatively
Postoperative pain intensity measured using the Numeric Rating Scale (NRS), a 0-10 scale where 0 indicates no pain and 10 indicates the worst imaginable pain. Higher scores indicates worse pain.
First 24 hours postoperatively

Collaborators and Investigators

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

Sponsor

Sehit Prof. Dr. Ilhan Varank Sancaktepe Training and Research Hospital

Collaborators

Maltepe University

Investigators

  • Principal Investigator: Talat Ercan E Şerifsoy, MD, Maltepe University Hospital

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 (Actual)

January 11, 2023

Primary Completion (Actual)

June 15, 2023

Study Completion (Actual)

June 15, 2023

Study Registration Dates

First Submitted

January 11, 2026

First Submitted That Met QC Criteria

January 11, 2026

First Posted (Actual)

January 20, 2026

Study Record Updates

Last Update Posted (Actual)

January 21, 2026

Last Update Submitted That Met QC Criteria

January 18, 2026

Last Verified

January 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • MALTEPE-2022-965164

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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