Impact of Microbiome Changes on Surgical Complications in Colorectal Surgery

Analysis of Mechanism on the Efficacy of Oral Antibiotic Prophylaxis in Elective Colon and Rectal Surgery With Primary Anastomosis

Observational Uzsoki Hospital · NCT05779254

This study is trying to see if changes in gut bacteria affect the risk of complications after colorectal surgery, especially for patients having a specific type of surgery.

Quick facts

Study typeObservational
Enrollment100 (estimated)
Ages18 Years and up
SexAll
SponsorUzsoki Hospital Academic / other
Locations3 sites (Budapest and 2 other locations)
Trial IDNCT05779254 on ClinicalTrials.gov

What this trial studies

This observational study investigates the relationship between the microbiome and surgical complications, specifically focusing on anastomotic leaks in colorectal surgery. It examines how variations in gut bacteria may influence surgical outcomes, particularly in patients undergoing circular stapled anastomosis. The study will involve administering neomycin sulfate as part of the bowel preparation process and analyzing intraoperative specimens for bacterial diversity. By understanding these dynamics, the research aims to identify risk factors associated with anastomotic failure and improve surgical techniques.

Who should consider this trial

Good fit: Ideal candidates include adults scheduled for colorectal surgery with planned circular stapled anastomosis who are not allergic to antibiotics.

Not a fit: Patients who have received antibiotics within two weeks prior to the study or those with chronic immunosuppression may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved surgical outcomes and reduced rates of complications for patients undergoing colorectal surgery.

How similar studies have performed: While the specific approach of this study is novel, previous research has indicated that microbiome diversity can impact surgical outcomes, suggesting potential for success.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Circular stapled anastomosis
* Planned surgery with colo-colic anastomosis
* No passage disorder, as it is confirmed at the first medical examination
* Not allergic to antibiotics
* Can receive a bowel preparation
* No proximal excluded intestine, i.e., the bowel preparation may be successful (ileostomy)

Exclusion Criteria:

* treated with antibiotics within 2 weeks before randomisation
* allergic to any of the medicines used
* under 18 years of age
* have suffered from abdominal sepsis within 6 months prior to recruitment
* pregnancy or breastfeeding
* been treated with steroids
* any form of chronic immunosuppression

Where this trial is running

Budapest and 2 other locations

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.
Conditions Anastomotic LeakMicrobial ColonizationColorectal surgeryAnastomotic leakSurgical site infectionMicrobiomeOral antibiotic prophylaxis
Last reviewed 2026-06-13 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.