Clinical trial Recruiting at 1 site Interventional Ages 18 and up

Post-filter hematocrit calculation for adults on continuous renal replacement therapy

Official title: Validation of a Post-Filter Hematocrit Calculation Formula: A Comparative Analysis With Measured Post-Filter Hematocrit Values

Run by University of Iowa · NCT07293936 · Data updated 2026-11-12

This will test whether a calculation can accurately predict post-filter hematocrit compared with machine-measured values in adults receiving continuous renal replacement therapy.

Quick facts

Study typeInterventional
Ages18 Years and up
SexAll
Enrollment20 (estimated)
SponsorUniversity of Iowa
Academic / other
Locations1 site (Iowa City, Iowa)
StatusRecruiting
StartedMarch 15, 2025
Main results expectedFebruary 1, 2026
Study endsMarch 15, 2026
Registry record updatedDecember 19, 2025
Trial IDNCT07293936 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults aged 18 or older who are currently receiving CRRT at the enrolling center and are not on extracorporeal membrane oxygenation (ECMO).

Probably not a fit

Patients not receiving CRRT, those on ECMO, or individuals whose clinical condition prevents reliable blood sampling would not benefit from this validation.

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

What this trial studies

Filter clotting is a common complication of continuous renal replacement therapy (CRRT) that leads to blood loss, reduced treatment efficacy, and higher cost. This single-center validation compares a calculated post-filter hematocrit using the proposed formula HCTpost = HCTpre/(FF(HCTpre-1)+1) with directly measured post-filter hematocrit values from CRRT machines. Adult patients receiving CRRT (age ≥18) will be sampled, with patients on ECMO excluded, and paired calculated and measured values will be analyzed to determine agreement. The study is a cross-sectional diagnostic/method-comparison effort to determine whether the formula provides sufficiently accurate estimates for clinical use.

Why it matters

Potential benefit: If accurate, the formula could allow clinicians to estimate post-filter hematocrit at the bedside and help guide filtration settings to reduce hemofilter clotting, blood loss, and treatment interruptions.

How similar studies have gone: Direct validation of post-filter hematocrit formulas is limited and the approach is relatively novel, with little prior evidence directly demonstrating clinical utility.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* patients initiated on CRRT age equal than or greater to 18 years of age

Exclusion Criteria:

* patients on ECMO

Where it's running

  • University of Iowa Hospitals and Clinics
    Iowa City, Iowa, United States
    Recruiting

Study contacts

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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.