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Comparative Analysis of Onlay and Sublay Mesh Repair Techniques in Umbilical Hernia Surgery

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Study Aim

This study aims to compare the effectiveness of two surgical techniques, onlay and sublay mesh repair, in the treatment of umbilical hernias.

What is being tested

Onlay Mesh Repair

+ Sublay Mesh Repair

Procedure
Who is being recruted

From 18 to 90 Years
+9 Eligibility Criteria
See all eligibility criteria
How is the trial designed

Treatment Study

Interventional
Study Start: February 2026
See protocol details

Summary

Principal SponsorBakirkoy Dr. Sadi Konuk Research and Training Hospital
Study ContactNurettin Sahin, MD
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Study start date: February 1, 2026

Actual date on which the first participant was enrolled.

Umbilical hernia repair is a common surgical procedure, with the use of prosthetic mesh proven to reduce recurrence rates compared to traditional stitch repair. Two popular mesh techniques are onlay and sublay repairs, each with unique advantages and disadvantages. Onlay repair involves placing the mesh over the hernia, while sublay repair positions the mesh underneath. This study aims to compare these two techniques in adult patients undergoing umbilical hernia surgery, with the goal of improving care and providing evidence-based decisions in clinical practice. Patients participating in this study will undergo either onlay or sublay mesh repair for their umbilical hernia. The study will record details such as demographic characteristics, hernia features, and operative specifics. Primary outcome measures include postoperative complication rates and hernia recurrence, while secondary measures include operative time, length of hospital stay, and early postoperative morbidity. Patients will be followed postoperatively according to standard clinical practice to assess surgical outcomes. The results are expected to provide valuable comparative data on the safety and effectiveness of both techniques.

Official TitleComparison of Onlay Mesh Repair and Sublay Mesh Repair in Umbilical Hernia Surgery
Principal SponsorBakirkoy Dr. Sadi Konuk Research and Training Hospital
Study ContactNurettin Sahin, MD
Last updated: January 28, 2026
Sourced from a government-validated database.Claim as a partner

Protocol

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

116 patients to be enrolled

Total number of participants that the clinical trial aims to recruit.

Treatment Study

These studies test new ways to treat a disease, condition, or health issue. The goal is to see if a new drug, therapy, or approach works better or has fewer side effects than existing options.


Eligibility

Researchers look for people who fit a certain description, called eligibility criteria: person's general health condition or prior treatments.
Criteria

Any sex

Biological sex of participants that are eligible to enroll.

From 18 to 90 Years

Range of ages for which participants are eligible to join.

Healthy volunteers not allowed

If individuals who are healthy and do not have the condition being studied can participate.

Criteria

4 inclusion criteria required to participate
Patients aged 18 to 90 years

Patients diagnosed with small or medium-sized umbilical hernia according to the European Hernia Society (EHS) classification

Patients scheduled for elective umbilical hernia surgery

Patients who provide written informed consent

5 exclusion criteria prevent from participating
Patients younger than 18 years or older than 90 years

Patients undergoing emergency umbilical hernia surgery

Patients with bowel obstruction

Patients with chronic kidney failure

Show More Criteria

Study Plan

Find out more about all the medication administered in this study, their detailed description and what they involve.
Treatment Groups

2 intervention groups are designated in this study

This study does not include a placebo group 

Treatment Groups

Group I

Active Comparator
This group involves a surgical procedure where a mesh is placed on the anterior fascia during umbilical hernia repair.

Group II

Active Comparator
This group involves a surgical procedure for umbilical hernia repair where a mesh is placed beneath the fascia, either in the retromuscular or preperitoneal plane.

Study Centers

These are the hospitals, clinics, or research facilities where the trial is being conducted. You can find the location closest to you and its status.

This study has 1 location

Suspended

Bakırköy Dr. Sadi Konuk Training and Research Hospital

Istanbul, Turkey (Türkiye)Open Bakırköy Dr. Sadi Konuk Training and Research Hospital in Google Maps
Recruiting soonOne Study Center
Comparative Analysis of Onlay and Sublay Mesh Repair Techniques in Umbilical Hernia Surgery | PatLynk