Bolus Reservoir and Bladder Dosing to Prevent Overfill Leakage
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Solution Overview
Problem
Existing bolus delivery devices may lead to over-administration of medication due to the risk of over-filling and leakage, which can be messy and inconvenient for users.
Innovation Solution
A bolus delivery device with a housing, reservoir, bladder, and actuator that includes features to prevent over-administration and leakage, such as a piston with a seal member and biasing member to control fluid flow, and a bladder expansion mechanism to store and dispense fluid efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bolus reservoir is added to allow bolus dosing, then the functionality and versatility of the infusion device is improved, but the risk of over-filling and leakage increases
Solution Approach 1:
The device is divided into two separate fluid storage compartments: a main reservoir for continuous infusion and a bolus reservoir for bolus dosing. This segmentation allows independent control and management of each reservoir, preventing over-filling issues while maintaining both continuous and bolus dosing capabilities
Solution Approach 2:
A valve mechanism acts as an intermediary between the bolus reservoir and the delivery system, controlling fluid flow from the bolus reservoir. This intermediary component prevents uncontrolled leakage and allows precise delivery of bolus doses only when activated
2Ease of operation
If the bolus reservoir is made accessible for user operation, then the ease of operation is improved, but the complexity of the device increases
Solution Approach 1:
The actuator mechanism serves multiple functions: it can be used to prime the continuous infusion system and also to activate bolus dosing. This multi-functionality reduces the need for separate controls and simplifies the overall device operation while maintaining both dosing modes
3Reliability
If safety mechanisms are added to prevent over-administration, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The device incorporates pre-set dosing limits and maximum fill levels in the bolus reservoir that prevent over-administration before it can occur. The system is designed with inherent safety features that limit the maximum bolus dose that can be delivered, eliminating the need for complex real-time monitoring mechanisms
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 device prevents over-administration and leakage, ensuring accurate and convenient delivery of medicinal fluids by allowing controlled bolus doses without additional user effort.
Implementation Method 1
The bladder expands as the bladder receives the fluid and contracts as the bladder dispenses the fluid
Implementation Method 2
a biasing member disposed around the distal end of the piston
Data Source
AI summary
A bolus delivery device is provided that comprises a housing and a reservoir defined by an activation dome and a reservoir seat and disposed within the housing for receipt of a volume of a fluid. The bolus delivery device further comprises a bladder disposed in the housing that is in fluid communication with the reservoir for receipt of the fluid from the reservoir; an actuator; an inlet conduit in fluid communication with the reservoir for providing the fluid to the reservoir; and an outlet conduit in fluid communication with the bladder for providing the fluid to a patient. The actuator is in operative communication with the reservoir to initiate a flow of the fluid from the reservoir to the bladder. The bladder expands as the bladder receives the fluid and contracts as the bladder dispenses the fluid. An infusion assembly including a bolus delivery device also is provided.