Sensor Insertion Base Plate Clamp Mechanism
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Solution Overview
Problem
Existing sensor insertion assemblies face challenges in preventing sensors from being pulled out of the body due to body movements, leading to incorrect biological information detection.
Innovation Solution
A sensor insertion assembly with a base plate and a sensor insertion device that includes a clamp portion with leaf spring portions to securely hold the sensor in place after the needle is pulled out, using a cam mechanism to adjust the engagement relationship and elastic deformation to prevent movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the sensor is left in the living body after needle removal, then biological information can be detected continuously, but the sensor may move or be pulled out due to body movements
Solution Approach 1:
The base plate serves as an intermediary between the sensor and the living body surface. It includes an adhesive portion that adheres to the skin and a clamp portion that secures the sensor, preventing the sensor from moving or being pulled out due to body movements while allowing continuous detection
Solution Approach 2:
The clamp portion is configured to clamp the sensor before the needle is completely removed from the living body. This preliminary clamping action prevents the sensor from moving during or after needle withdrawal, ensuring stable positioning for continuous monitoring
2Reliability
If the clamp portion clamps the sensor tightly, then the sensor is secured against movement, but the sensor may be damaged or the clamping mechanism becomes complex
Solution Approach 1:
The clamp portion utilizes elastic deformation of the base plate material to achieve clamping force. By changing the physical state from rigid to elastic, the system achieves secure sensor fixation without complex mechanical components, as the elastic material naturally adapts its shape to clamp the sensor firmly
Solution Approach 2:
The base plate is designed as a flexible structure that can elastically deform to clamp the sensor. This flexible approach replaces complex rigid clamping mechanisms with a simpler elastic deformation-based system that achieves the same fixation purpose
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 solution effectively secures the sensor in place, ensuring accurate biological information detection even with body movements, by clamping the sensor's proximal end and using an adhesive on the base plate for stability.
Implementation Method 1
a cam portion capable of changing an engagement relationship with the pair of leaf spring portions along with an operation of the rotating and thereby changing an amount of elastic deformation of the pair of leaf spring portions
Implementation Method 2
an adhesive portion that adheres on a surface of the living body is provided on a surface of the base plate opposing the surface of the living body
Data Source
AI summary
A sensor insertion assembly includes: a sensor insertion device comprising a needle member configured to be inserted in a living body together with a biological information sensor and to be pulled out of the living body after leaving a distal end side of the sensor in the living body; and a base plate detachably attached to a first end side of the sensor insertion device, the base plate comprising a clamp portion configured to move so as to clamp a proximal end side of the sensor extending to an outside of the living body after pulling out the needle member and along with an operation of detaching the sensor insertion device from the base plate.