Infusion Device Fluid Line Fixation Mechanism
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Solution Overview
Problem
Peristaltic infusion devices face challenges in maintaining accurate and consistent pumping volume due to varying friction conditions and fluid line displacement during operation, leading to inconsistencies in the administered dosage of medical fluids.
Innovation Solution
A fixation mechanism is introduced to securely hold a longitudinal portion of the fluid line in place relative to the housing section, reducing movement and ensuring consistent interaction with the pumping mechanism, thereby stabilizing the pumped volume across cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the fluid line is allowed to move freely in the receptacle, then the device complexity is reduced and ease of operation is improved, but the pumping accuracy deteriorates due to varying friction conditions and fluid line displacement
Solution Approach 1:
The fluid line is pre-fixed to the housing section before the infusion operation begins. This preliminary fixation ensures that the fluid line maintains a consistent position relative to the pumping mechanism throughout the infusion process, eliminating displacement issues and ensuring accurate pumping volume from the start without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
A fixation mechanism serves as an intermediary element between the fluid line and the housing section. This mediator component securely holds the fluid line in place, providing stable interaction with the pumping mechanism while keeping the overall device structure relatively simple and avoiding overly complex fixation systems.
2Reliability
If the fluid line is fixed in place, then the pumping accuracy is improved by maintaining consistent conditions, but the ease of operation deteriorates due to reduced flexibility in fluid line positioning
Solution Approach 1:
The fixation mechanism is applied locally at specific positions where the fluid line interacts with the pumping mechanism, rather than fixing the entire fluid line rigidly. This localized fixation maintains reliability in the critical pumping region while leaving other portions of the fluid line flexible and easy to position and replace.
Solution Approach 2:
The fixation system is designed to be dynamic rather than completely rigid, allowing for controlled movement and positioning during setup while maintaining stable fixation during operation. This enables easy initial positioning and replacement of the fluid line while ensuring reliable pumping once positioned.
3Manufacturing precision
If the fluid line is not fixed, then the ease of manufacture is improved, but the consistency of pumped volume deteriorates due to fluid line movement and varying friction conditions
Solution Approach 1:
The fluid line is pre-fixed to the housing section before the infusion operation begins. This preliminary fixation ensures that the fluid line maintains a consistent position relative to the pumping mechanism throughout the infusion process, eliminating displacement issues and ensuring accurate pumping volume from the start without requiring complex real-time adjustment mechanisms.
Solution Approach 2:
A fixation mechanism serves as an intermediary element between the fluid line and the housing section. This mediator component securely holds the fluid line in place, providing stable interaction with the pumping mechanism while keeping the overall device structure relatively simple and avoiding overly complex fixation systems.
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 fixation mechanism enhances pumping accuracy by maintaining consistent conditions for the fluid line in each pump cycle, resulting in a stable and precise delivery of medical fluids, ensuring reliable and exact infusion operations.
Implementation Method 1
The pumping mechanism herein in a peristaltic fashion acts onto a fluid line for transporting a medical fluid through the fluid line
Implementation Method 2
Friction conditions in the interaction between the pumping mechanism and the fluid line herein may vary over a pump cycle, such that the fluid line-in conventional setups-overall or locally may move
Data Source
AI summary
An infusion device (1) for administering a medical fluid to a patient (P) comprises a housing (10) having a housing section, a receptacle (101) arranged on the housing (10) for receiving a flexibly deformable fluid line (2) longitudinally extending along a longitudinal direction of extension (D), and a pumping mechanism (4) configured to interact with the fluid line (2), the pumping mechanism (4) being configured to act onto the fluid line (2) for causing a fluid flow (F) through said fluid line (2). A fixation of a longitudinal portion (23) of the fluid line (2) with respect to the housing section is established in an operative state in which the fluid line (2) is received in the receptacle (101) for interacting with the pumping mechanism (4).