Clinical trial Recruiting at 1 site Observational Ages 18 to 70

Using blood conservation technique during heart surgery to assess kidney function

Official title: Effect of Low-volume Fluid Replacement Strategy During Acute Normovolemic Hemodilution on Urine Neutrophil Gelatinase-associated Lipocalin Levels: an Acute Kidney Injury Biomarker

Run by University of Maryland, Baltimore · NCT05349292 · Data updated 2026-11-12

This study is testing if a blood-saving technique during heart surgery can help improve kidney function in patients while also reducing the need for blood transfusions.

Quick facts

Study typeObservational
Ages18 Years to 70 Years
SexAll
Enrollment100 (estimated)
SponsorUniversity of Maryland, Baltimore
Academic / other
Locations1 site (Baltimore, Maryland)
StatusRecruiting
StartedJanuary 31, 2024
Main results expectedJune 30, 2027
Study endsDecember 31, 2027
Registry record updatedMay 1, 2026
Trial IDNCT05349292 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Ideal candidates are adults aged 18-70 undergoing elective CABG surgery with a predicted cardiopulmonary bypass duration of less than 2 hours.

Probably not a fit

Patients with renal insufficiency, significant heart or lung diseases, or those requiring emergency surgeries may 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 observational study evaluates the effects of acute normovolemic hemodilution (ANH) on urine neutrophil gelatinase-associated lipocalin levels in patients undergoing elective coronary artery bypass graft (CABG) surgery. A total of 50 adult patients under 70 years old will be randomly assigned to receive either ANH or standard care without ANH during their surgery. The study aims to determine if ANH can improve kidney function indicators while reducing the need for blood transfusions. Exclusion criteria include patients with renal insufficiency, significant comorbidities, or those undergoing emergency surgeries.

Why it matters

Potential benefit: If successful, this approach could lead to improved kidney function outcomes and reduced blood transfusion needs for patients undergoing heart surgery.

How similar studies have gone: Previous studies have shown improvements in blood transfusion rates with similar techniques, but this specific approach is being evaluated for the first time regarding kidney function.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Elective Coronary Artery Bypass Graft Surgery
* Age 18-70 years
* Anticipated Cardiopulmonary Bypass Duration less than 2 hours
* Weight greater than 70kg
* Hemoglobin greater than 12 g/dL

Exclusion Criteria:

* Emergency and redo cardiac surgery
* Renal insufficiency with serum creatinine greater than 1.25 mg/dL and/ or estimated GFR less than 60 mL/min/1.73 m2
* Heart Failure with EF \<40%
* Hepatic disease
* Pulmonary Disease, including pulmonary hypertension
* Inherited or Acquired Bleeding Disease

Where it's running

  • University of Maryland Medical Center
    Baltimore, Maryland, United States
    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.