Comparing two surgical methods for hiatal hernia repair

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

NA · Kuopio University Hospital · NCT06725433

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

PhaseNA
Study typeInterventional
Enrollment150 (estimated)
Ages18 Years and up
SexAll
SponsorKuopio University Hospital (other)
Locations1 site (Kuopio)
Trial IDNCT06725433 on ClinicalTrials.gov

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.

Who should consider this trial

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

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

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

Eligibility criteria

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 this trial is running

Kuopio

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.

View on ClinicalTrials.gov →

Conditions: Hiatal Hernia, Paraesophageal Hernia, Recurrence

Last reviewed 2026-05-15 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.