Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Comparing two surgical methods for hiatal hernia repair

Official title: NiDor-study: a Randomized Controlled Trial Comparing Nissen and Dor Fundoplication in Hiatal Hernia Repair

Run by Kuopio University Hospital · NCT06725433 · Data updated 2026-11-12

This study is testing which of two surgical methods for fixing hiatal hernias works better to prevent them from coming back and improve quality of life for patients.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment150 (estimated)
SponsorKuopio University Hospital
Academic / other
Locations1 site (Kuopio)
StatusRecruiting
StartedFebruary 7, 2025
Main results expectedJanuary 30, 2030
Study endsJanuary 30, 2030
Registry record updatedFebruary 19, 2025
Trial IDNCT06725433 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18 and older with Type II-IV hiatal hernias scheduled for minimally invasive repair.

Probably not a fit

Patients with recurrent hiatal hernias or those requiring additional surgical procedures will not benefit from this study.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This clinical trial aims to compare the effectiveness of two surgical techniques, Nissen fundoplication and Dor fundoplication, in preventing the recurrence of hiatal hernias. Participants will be randomly assigned to one of the two procedures during minimally invasive surgery. The study will assess anatomical and symptomatic recurrence rates, the use of anti-reflux medications, and quality of life related to gastroesophageal reflux disease (GERD) at 12 months post-operation. Additionally, a long-term follow-up will analyze reoperation rates using national registry data.

Why it matters

Potential benefit: If successful, this study could lead to improved surgical outcomes and reduced recurrence rates for patients with hiatal hernias.

How similar studies have gone: Previous studies have shown varying success rates with different surgical techniques for hiatal hernia repair, making this comparison relevant and necessary.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* At least 18 years of age
* Type II-IV hiatal hernia, confirmed by radiology or endoscopy
* Scheduled for mini-invasive hiatal hernia repair
* Emergency mini-invasive surgery for hiatal hernia
* The informed consent is acquired

Exclusion Criteria:

* Recurrent hiatal hernia
* Need for esophageal lengthening procedure (Collis)
* Gangrene or need for any resection during (emergency) surgery
* Need for laparotomy or thoracotomy/thoracoscopy
* No written consent

Where it's running

  • Kuopio University Hospital
    Kuopio, Finland
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.