Post-Filter Hematocrit (CRRTHCT)

Gwyndolyn M. Radford

Status: Enrolling

Conditions: Renal Failure; Continuous Renal Replacement Therapy; Hemofilter Clotting

Treatments: Other: Measured Post-Filter Hematocrit; Other: Calculated Post-Filter Hematocrit

Study type: Interventional

Funder types: Other

Identifiers

NCT07293936

202412294

Details and patient eligibility

About

Filter clotting is a major complication of continuous renal replacement therapy (CRRT), resulting in blood loss, reduced treatment efficacy, and increased cost. One modifiable factor associated with filter clotting is filtration fraction (FF), or the proportion of plasma water being removed from the blood over the course of the filter. In convention, a cutoff of FF<20-30% has been used to prevent hemofilter clotting, but no evidence correlating FF with hemofilter clotting has been documented. Some experts have proposed that post-filter hematocrit (Hct) could be a more direct marker for determining hemofilter clotting risk, but evidence supporting clinical utility of this marker is lacking.

HCTpost=HCTpre/(FF(HCTpre-1)+1)

In our proposed validation study, we hope to determine whether our formula for post-filter Hct provides accurate results when compared to measured values. The information obtained from this study will potentially justify the use of utilizing the formula in future studies.

The procedure of this study is collecting blood samples from the post-filter lines of patients on CRRT at different time points and different flow rates. This will be considered the "measured post-filter hematocrit" which will then be compared to the calculated formula above, using the other values obtained from daily labs (for pre-filter hematocrit) and CRRT machine settings.

Full description

This investigational study is listed as "other" because it is a validation study comparing two measurement methods-comparing a calculated versus a machine-measured post-filter hematocrit- and is typically classified as a cross-sectional investigational study in the context of diagnostic or method comparison research.

Enrollment: 20 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

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

Exclusion criteria

• patients on ECMO

Trial design

Primary purpose: Other

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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20 participants in 1 patient group

CRRT patients

Other group

Description:

All participants will receive the same "intervention" of both measuring and calculating post-filter hematocrit.

Treatment:

Other: Calculated Post-Filter Hematocrit

Other: Measured Post-Filter Hematocrit