Peritoneal Dialysis Tidal-Dwell Sequencing for Toxin Clearance
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Solution Overview
Problem
Existing peritoneal dialysis methods may not adequately address the removal of toxins and ultrafiltration needs for patients with varying peritoneal membrane transport characteristics, leading to inefficiencies and discomfort.
Innovation Solution
A method involving alternating tidal therapy and dwell phases with hypertonic solutions, combined with dialysis sorbents and calcium/magnesium ions, to enhance toxin clearance and ultrafiltration without increasing sorbent use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If tidal peritoneal dialysis is used to remove toxins, then toxin clearance is improved, but ultrafiltration efficiency deteriorates
Solution Approach 1:
The patent implements periodic action by alternating between tidal therapy phases (for toxin removal) and dwell phases (for ultrafiltration). The cycler automatically performs multiple cycles of filling, draining, and dwelling with hypertonic solutions, creating periodic oscillations that separately optimize toxin clearance and ultrafiltration without requiring simultaneous execution of both functions
2Reliability
If additional dwell time is added to achieve required tonicity, then dialysis efficacy is improved, but treatment time increases
Solution Approach 1:
The patent applies parameter changes by using hypertonic solutions (higher than normal tonicity) during dwell phases. This parameter modification allows the peritoneal membrane to achieve required tonicity more rapidly, improving dialysis efficacy while reducing the time needed for each dwell phase compared to using isotonic or hypotonic solutions
3Ease of operation
If small tidal volume is moved frequently, then patient comfort is improved, but toxin removal efficiency deteriorates
Solution Approach 1:
The patent applies local quality by creating different functional zones within the peritoneal dialysis system: small tidal volumes are used during active exchange phases to maintain patient comfort, while hypertonic dwell phases create localized high-concentration regions that enhance toxin removal. The automated cycler manages these different local conditions sequentially without requiring the entire system to operate at maximum intensity simultaneously
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This approach achieves enhanced toxin clearance and ultrafiltration, meeting or exceeding the KDIGO guidelines for dialysis efficacy without requiring additional fluid or sorbents, thus improving patient comfort and treatment efficiency.
Implementation Method 1
allowing water and/or a toxin from the subject to pass into the peritoneal cavity by osmosis, thereby forming an Nth hypertonic solution within the peritoneal cavity
Data Source
AI summary
Disclosed herein is a method of peritoneal dialysis, the method comprising the steps of: (i) administering to a subject a first hypertonic solution comprising a sugar to a peritoneal cavity in the subject, followed by; (ii) a tidal therapy phase and then a dwell phase; or a dwell phase and then a tidal therapy phase.