Automated Peritoneal Dialysis Peristaltic Pump With Drain Purge
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Solution Overview
Problem
Existing automated peritoneal dialysis (APD) systems face issues with sealing problems in pneumatic cassette systems, leading to delayed treatment start times and acoustic noise, and require improvements for user convenience and efficiency.
Innovation Solution
A peristaltic pump-driven APD system with a disposable cassette that includes a peristaltic pump actuator, pinch valve actuators, and a control unit for automated fluid management, featuring a user interface, bag shelf enclosure, and a moveable raceway for easy cassette loading, along with integrated pressure and weight sensing for precise fluid control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Extent of automation
If pneumatic cassette systems are used in automated peritoneal dialysis, then automated fluid management is achieved, but sealing problems occur leading to delayed treatment start times
Solution Approach 1:
The patent replaces the pneumatic mechanical system with an electrically-driven peristaltic pump system. The peristaltic pump uses electrical motor actuation to compress and release the tubing in a sequential manner, eliminating the need for pneumatic seals and chambers. This substitution resolves the sealing reliability issue while maintaining automated fluid management functionality.
Solution Approach 2:
The patent extracts and removes the problematic pneumatic sealing components from the system. By eliminating the pneumatic cassette, seals, and associated sealing mechanisms, the design removes the source of sealing failures and treatment delays while retaining the essential automated pumping and fluid management capabilities through the peristaltic pump mechanism.
2Extent of automation
If pneumatic cassette systems are used in automated peritoneal dialysis, then automated fluid management is achieved, but acoustic noise is generated
Solution Approach 1:
The patent replaces the pneumatic mechanical system with an electrically-driven peristaltic pump system. The peristaltic pump uses electrical motor actuation to compress and release the tubing in a sequential manner, eliminating the need for pneumatic seals and chambers. This substitution resolves the sealing reliability issue while maintaining automated fluid management functionality.
Solution Approach 2:
The patent extracts and removes the problematic pneumatic sealing components from the system. By eliminating the pneumatic cassette, seals, and associated sealing mechanisms, the design removes the source of sealing failures and treatment delays while retaining the essential automated pumping and fluid management capabilities through the peristaltic pump mechanism.
3Extent of automation
If complex pneumatic systems are used, then automated dialysis function is achieved, but device complexity increases
Solution Approach 1:
The patent replaces the pneumatic mechanical system with an electrically-driven peristaltic pump system. The peristaltic pump uses electrical motor actuation to compress and release the tubing in a sequential manner, eliminating the need for pneumatic seals and chambers. This substitution resolves the sealing reliability issue while maintaining automated fluid management functionality.
Solution Approach 2:
The patent extracts and removes the problematic pneumatic sealing components from the system. By eliminating the pneumatic cassette, seals, and associated sealing mechanisms, the design removes the source of sealing failures and treatment delays while retaining the essential automated pumping and fluid management capabilities through the peristaltic pump mechanism.
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
The system provides a streamlined, quiet, and efficient APD process that reduces user effort, minimizes disposable costs, and ensures safe pressure limits while simplifying the removal of used dialysis fluid to a house drain, enhancing patient convenience and treatment effectiveness.
Implementation Method 1
The pump actuator is a peristaltic pump actuator and the pumping portion of the disposable set includes a peristaltic pump tube
Implementation Method 2
The cycler includes a pressure sensor, and the disposable set includes a pressure pod positioned to enable a pressure change to be detected
Implementation Method 3
The cycler includes a weight sensor, and the disposable set includes a drain container
Implementation Method 4
The actuation surface includes a heater
Data Source
AI summary
A peritoneal dialysis system comprises a cycler including a pump actuator; a disposable set including a pumping portion operable with the pump actuator, a patient line positioned to fluidly communicate with the pumping portion, and a drain container positioned to fluidly communicate with the pumping portion; and a control unit configured to cause the pump actuator to actuate the pumping portion to (i) run a peritoneal dialysis treatment in which fresh dialysis fluid is pumped through the patient line to a patient and used dialysis fluid is pumped from the patient to the drain container, and (ii) at the end of treatment, pump the used dialysis fluid from the drain container, through the patient line, to a house drain.