Effect of CRRT Duration on Solute Removal

The only FDA approved treatment for acute kidney injury(AKI) for patients is Dialysis-also known as renal replacement therapy(RRT). Continuous RRT(CRRT) is the preferred method in the ICU. Patients receiving CRRT with AKI will be recruited to the study where blood and effluent will be collect prior to CRRT initiation and Day 1,2,and 3 following. Metabolites will be assessed to determine solute removal, and also to identify the time at which solute removal has reached steady state. This will help determine the best duration of CRRT.

Study Overview

• Status: Completed
• Conditions: Sepsis; AKI

Detailed Description

Acute kidney injury (AKI) occurs in 30-50% of hospitalized patients admitted to the intensive care unit (ICU). Dialysis - also known as renal replacement therapy (RRT) - is the only FDA approved treatment for AKI and continuous RRT (CRRT) is generally the preferred method of RRT in the ICU. The in-hospital mortality of patients with AKI requiring dialysis in the ICU is over 50% which is much greater than other serious illnesses.Unfortunately, the quality of care delivered to patients with AKI receiving CRRT is poor due to practice variability and lack of quality indicators to assess CRRT performance. Since one of the fundamental purposes of CRRT is to remove the build-up of metabolites that accumulate during AKI, accurate methods to assess solute clearance would be especially valuable. Indeed, development of methods to assess solute clearance during CRRT has been identified as a research priority. Although changes in plasma creatinine has been suggested as a potential quality indicator of solute removal during CRRT, no study has assessed how reductions of plasma creatinine over time compare to the reductions of other plasma metabolites. Thus, the duration of CRRT necessary to achieve adequate solute removal is unknown - in fact, there is not yet even an agreed-upon working definition of what adequate solute removal during CRRT should be. The investigators propose to conduct a prospective, single center study of 112 CRRT patients to determine the effect of CRRT duration on solute removal in order to identify the time at which solute removal has reached steady state. To assess solute removal, 102 metabolites will be determined in the plasma and effluent via untargeted ultra high pressure liquid chromatography coupled to mass spectrometry (UHPLC-MS). Metabolites will be assessed on plasma collected immediately prior to CRRT initiation, and on plasma and effluent collected on days 1, 2, and 3 post-CRRT initiation. Steady state is defined as the time point at which a plasma metabolite is not significantly reduced during CRRT - as assessed over a 24 hour time period. Based on preliminary data, the investigators hypothesize that >90% of metabolites will reach steady state by day 2 of CRRT, and that >95% of metabolites will reach steady state by day 3 of CRRT.

• Study Type: Observational
• Enrollment (Actual): 112

Contacts and Locations

• Study Contact: Name: Sarah Faubel; Phone Number: 303-724-4813; Email: sarah.faubel@cuanschutz.edu
• Study Contact Backup: Name: Kristy Rolloff; Phone Number: 303-990-0458; Email: kristy.rolloff@cuanschutz.edu

Study Locations

• United States
  • Colorado
    • Aurora, Colorado, United States, 80045
      • University of Colorado Hospital

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years and older (ADULT, OLDER_ADULT)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Probability Sample

Study Population

Adult patients admitted to University of Colorado Hospital and being initiated on CRRT.

Description

Inclusion Criteria:

• All adult patients being initiated on CRRT at University of Colorado Hospital (UCH) will be considered for enrollment.

Exclusion Criteria:

• Vulnerable populations such as children, pregnant women, and prisoners will be excluded.

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Steady State Metabolites	The primary outcome of interest is the binary identification of steady state for each metabolite. Approximately 100 metabolites will be measured including amino acids, phosphorus, creatinine, and BUN	3 years

Collaborators and Investigators

• Sponsor: University of Colorado, Denver

Study record dates

Study Major Dates

• Study Start (ACTUAL): October 1, 2020
• Primary Completion (ACTUAL): December 21, 2022
• Study Completion (ACTUAL): December 21, 2022

Study Registration Dates

• First Submitted: July 1, 2020
• First Submitted That Met QC Criteria: July 1, 2020
• First Posted (ACTUAL): July 7, 2020

Study Record Updates

• Last Update Posted (ESTIMATE): February 14, 2023
• Last Update Submitted That Met QC Criteria: February 10, 2023
• Last Verified: February 1, 2023

More Information

Terms related to this study

• Other Study ID Numbers: 18-0405

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No