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Published on: July 19, 2018
Kinetic modeling of continuous flow peritoneal dialysis
1Department of Medicine, University of California, San Francisco, USA. frank.gotch@fmc-na.com
Seminars in Dialysis
|October 27, 2001
Summary
Kinetic models for continuous flow peritoneal dialysis (CFPD) predict effective urea clearance. Optimized CFPD may offer a weekly stdKt/V competitive with daily hemodialysis.
Area of Science:
- Nephrology
- Biomedical Engineering
- Mathematical Modeling
Background:
- Peritoneal dialysis (PD) is a crucial renal replacement therapy.
- Optimizing PD efficiency, such as urea clearance (Kp), is essential for patient outcomes.
- Continuous flow PD (CFPD) offers a potential improvement over traditional methods.
Purpose of the Study:
- To develop and analyze kinetic models for continuous single-pass and recirculating peritoneal dialysate flow.
- To evaluate the impact of dialysate flow rate and external dialyzer properties on Kp.
- To assess the potential of optimized CFPD to achieve clinically relevant solute and fluid removal targets.
Main Methods:
- Derivation of kinetic models for peritoneal urea clearance.
- Generalized solution of the derived models.
- Analysis of existing in vivo data to validate model predictions.
- Kinetic modeling of ultrafiltration and glucose absorption.
Main Results:
- Both models predict Kp as a function of peritoneal mass transfer coefficient (MTC) and external dialyzer dialysance (D).
- MTC is influenced by dialysate flow rate and distribution.
- Achievable MTC and Kp levels suggest potential for 8-hour overnight CFPD to provide a weekly stdKt/V of 3.2.
- Ultrafiltration rates of 0.2-0.3 L/hr and reduced glucose absorption are predicted.
Conclusions:
- Kinetic models provide a framework for optimizing CFPD.
- Optimized CFPD shows promise for achieving dialysis adequacy comparable to daily hemodialysis.
- CFPD may offer advantages in fluid removal and reduced glucose absorption compared to continuous ambulatory peritoneal dialysis (CAPD).
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