Study on complications and long-term outcomes after high-risk surgeries

Perioperative Longitudinal Study of Complications and Long-term Outcomes

Observational UMC Utrecht · NCT05331118

This study is trying to see how well we can predict and identify complications in patients having high-risk surgeries by monitoring them closely after their operations.

Quick facts

Study typeObservational
Enrollment9000 (estimated)
Ages18 Years and up
SexAll
SponsorUMC Utrecht Academic / other
Locations1 site (Utrecht)
Trial IDNCT05331118 on ClinicalTrials.gov

What this trial studies

This observational study aims to improve preoperative risk assessment and early diagnosis of complications in patients undergoing elective intermediate to high-risk non-cardiac surgeries. Participants will be monitored daily for the first week post-surgery by dedicated observers who will assess clinical events and perform non-invasive physiological measurements. Additionally, blood and microbiome samples will be collected at various time points to establish a comprehensive biorepository for future research. The primary outcomes focus on the occurrence of infections, major cardiac events, and pulmonary complications.

Who should consider this trial

Good fit: Ideal candidates are adults undergoing elective high-risk gastrointestinal or vascular procedures, or intermediate-risk surgeries with specific criteria.

Not a fit: Patients under 18 years, those requiring emergency surgery, or individuals with severe anemia will not benefit from this study.

Why it matters

Potential benefit: If successful, this study could enhance postoperative recovery and improve long-term outcomes for patients undergoing high-risk surgeries.

How similar studies have performed: While similar observational studies have been conducted, this specific approach to establishing a biorepository for perioperative complications is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria:

\- Undergoing an elective, high-risk gastro-intestinal or vascular procedure, or intermediate risk procedure (including gynaecological, orthopaedic and head and neck surgery) if the procedure includes a laparotomy and/or is associated with a scheduled hospital length of stay ≥ 5 days.

Exclusion Criteria:

* \< 18 years of age
* Emergency surgery
* Severe anaemia (Hb \< 4.5 mmol/L)
* Unable to provide informed consent

Where this trial is running

Utrecht

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 Perioperative ComplicationInfectionsMyocardiumInjuryKidney InjuryDelirium
Last reviewed 2026-06-15 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.