Infusion Pump Cassette Slider Latching Mechanism
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Solution Overview
Problem
Current infusion pump systems face challenges in efficiently managing disposable IV cassettes, including air bubble detection and fluid flow control, which can lead to contamination risks and operational inefficiencies.
Innovation Solution
The development of a disposable IV pump cassette system with a rigid body, compliant membrane, and a longitudinally articulable slider, integrated with a cassette recess that includes engagement slots and a processing unit, allowing for secure latching and efficient fluid pathway management.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a disposable IV pump cassette system is used, then contamination risk is reduced, but device complexity increases due to integrated components
Solution Approach 1:
The pump system is divided into disposable cassettes and reusable pump body, allowing the cassette to be discarded after single use, eliminating contamination risk while keeping the reusable pump body relatively simple
Solution Approach 2:
The slider mechanism is nested within the cassette structure, with engagement protrusions fitting into engagement slots on the pump body, creating a compact integrated design that reduces overall complexity
2Reliability
If secure latching mechanism is implemented, then operational reliability is improved, but ease of operation deteriorates due to additional latching steps
Solution Approach 1:
The slider mechanism automatically engages with the pump body when the cassette is inserted, with engagement protrusions automatically fitting into engagement slots, eliminating the need for manual latching operations while ensuring secure connection
3Measurement precision
If fluid flow control is enhanced, then infusion precision is improved, but device complexity increases due to additional control mechanisms
Solution Approach 1:
The compliant membrane serves multiple functions: it acts as a seal, a pump element for fluid delivery, and a sensor for detecting air bubbles, eliminating the need for separate components and reducing overall device complexity while maintaining infusion precision
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 solution enhances the secure latching of IV cassettes, reduces the risk of contamination, and improves the efficiency of fluid flow control, enabling precise and reliable infusion pump operations.
Implementation Method 1
Some infusion pumps move fluid through an IV tube using a peristaltic pumping mechanism that acts on the IV tube
Data Source
Figure 1A
Figure 1B
Figure 2A~2B
AI summary
Pump cassettes, infusion systems, and methods are described. An example pump cassette may include a rigid body comprising a frame portion, a base portion, a compliant membrane disposed substantially therebetween, and two opposing longitudinal edge sections. The rigid body may include a controllable fluid pathway defined in part by the compliant membrane and extending from an inlet port to an outlet port. The pump cassette may include a slider coupled to the two opposing longitudinal edge sections and longitudinally articulable with respect to the rigid body.