Rotating Cart Dialysis System for Patient Access and Solution Stability
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Solution Overview
Problem
Current automated peritoneal dialysis systems are cumbersome, require significant patient effort, and can lead to physiologically unsafe conditions due to instability of bicarbonate-based solutions, which precipitate in the presence of magnesium and calcium, necessitating dual chamber bags and manual mixing.
Innovation Solution
A mobile and user-friendly automated peritoneal dialysis system with a rotating cart, dual lumen patient line for efficient priming, auto-connection mechanism for supply bags, real-time fluid volume measurement, and non-invasive temperature sensing, along with improved leak detection and bag management to ensure proper solution mixing and delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If bicarbonate-based solutions are used in dual chamber bags, then the solution stability is improved, but the device complexity increases due to manual mixing requirements
Solution Approach 1:
The solution is divided into two separate chambers (acid chamber and bicarbonate chamber) within a single bag, physically separating components that would otherwise react and precipitate. This segmentation maintains solution stability while allowing automated mixing through controlled delivery sequences.
Solution Approach 2:
The system performs preliminary actions by pre-positioning the dual chamber bag and automatically sequencing the delivery of acid solution followed by bicarbonate solution, eliminating the need for manual mixing operations while maintaining solution stability.
2Productivity
If automated peritoneal dialysis systems are implemented, then the productivity is improved, but the ease of operation deteriorates due to patient effort requirements
Solution Approach 1:
The system enables self-service by providing automated pump control, automatic supply bag connection, and self-monitoring of fluid delivery, allowing the dialysis treatment to operate autonomously without requiring patient effort or manual intervention during the treatment cycles.
Solution Approach 2:
The dialysis machine integrates multiple functions including automated pumping, supply bag management, fluid level sensing, and treatment cycling into a single system that operates independently, improving productivity while minimizing patient effort requirements.
3Ease of operation
If supply bags are manually connected, then the ease of operation is maintained, but the loss of time increases due to manual intervention
Solution Approach 1:
The system performs preliminary actions by automatically detecting when supply bags are low, positioning replacement bags, and executing the connection process without patient intervention, thereby reducing setup time while maintaining ease of operation through automated sequences.
Solution Approach 2:
The manual mechanical connection process is replaced with an automated system that uses sensors to detect bag levels, motorized mechanisms to position and connect supply bags, and control systems to manage the entire replacement sequence, significantly reducing the time required for bag changes.
Data Source
AI summary
A dialysis system includes a dialysis instrument including at least one pump actuator; a disposable cassette operable with the at least one pump actuator; a plurality of supply containers connected fluidly to the disposable cassette; and a cart which includes a rotatable bearing plate onto which the instrument and supply containers are loaded, the bearing plate allowing a patient to turn the instrument and supply containers relative to the cart for selective access to the instrument or the supply containers.