Solute Clearance Evaluation and Filter Clotting Prediction in Continuous Renal Replacement Therapy

Overview

Journal J Clin Med

Specialty General Medicine

Date 2023 Dec 23

PMID 38137772

Authors

Kohei Yoshimoto

Ryo Matsuura

Yohei Komaru

Teruhiko Yoshida

Yoshihisa Miyamoto

Yoshifumi Hamasaki

Ryota Inokuchi

Masaomi Nangaku

Kent Doi

Affiliations

Soon will be listed here.

Abstract

Unexpected filter clotting is a major problem in continuous renal replacement therapy (CRRT). Reduced solute clearance is observed prior to filter clotting. This single-center, retrospective, observational study aimed to determine whether reduced solute clearance of low- and medium-molecular-weight molecules in CRRT can predict filter clotting. Solute clearances of urea and myoglobin (Mb) were measured at 24 h after initiation of continuous hemodiafiltration (CHDF). Clearance per flow (CL/F) was calculated. The primary outcome was clotting of the filter in the subsequent 24 h, and 775 CHDF treatments conducted on 230 patients for at least 24 consecutive hours in our ICU were analyzed. Filter clotting was observed in 127 treatments involving 39 patients. Urea and Mb CL/F at 24 h were significantly lower in the patients who experienced clotting. Further analysis was limited to the first CHDF treatment of each patient to adjust for confounding factors. Multivariate logistic regression analysis revealed that both urea CL/F < 94% and Mb CL/F < 64% were significant predictors of clotting within the next 24 h. Lower urea and Mb CL/F measured at 24 h after CRRT initiation were associated with filter clotting in the next 24 h. Further study is necessary to ascertain whether measurement of urea and MB CL/F will help with avoiding unexpected filter clotting.

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