Insertion Needle Clamping and Release for Precise Placement
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Solution Overview
Problem
Existing insertion devices face challenges in achieving precise implantation of medical devices at the desired depth in a living body, due to issues with the gap between the needle portion and the medical device, leading to either catching or improper placement.
Innovation Solution
The insertion device and needle member incorporate a needle portion with a clamping portion that can change forms, and a movable portion that engages the clamping portion to release the medical device, ensuring it is implanted at the correct depth.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the gap between the needle portion and the medical device is small, then the medical device is less likely to move during insertion, but the medical device is likely to be caught by the inner surface of the needle portion when removing the needle portion
Solution Approach 1:
The clamping portion is designed to dynamically change its clamping force state. During insertion, it maintains strong clamping force to stabilize the medical device. During removal, the movable portion engages with the clamping portion to reduce clamping force, allowing easy separation without catching.
Solution Approach 2:
The clamping force parameter is changed by the engagement between the movable portion and clamping portion. When the movable portion moves to engage the clamping portion, the clamping force is reduced, transforming the interaction from tight clamping to loose contact, enabling smooth removal.
2Ease of operation
If the gap between the needle portion and the medical device is large, then the needle portion can be easily removed, but the medical device is likely to move in the needle portion due to impact during insertion
Solution Approach 1:
The system transitions from a static gap to a dynamic clamping mechanism. The movable portion allows the clamping portion to adapt its position and force, providing stability during insertion and ease of removal during extraction without requiring a fixed large gap.
Solution Approach 2:
The movable portion acts as an intermediary between the needle portion and the medical device. It mediates the interaction by allowing controlled engagement with the clamping portion, enabling the needle portion to maintain stability during insertion while facilitating easy removal.
3Manufacturing precision
If the needle portion is designed to firmly hold the medical device, then the medical device can be implanted at the desired depth, but the needle portion becomes difficult to remove
Solution Approach 1:
The clamping portion is designed with dynamic clamping characteristics that change based on the operational phase. During insertion, it provides firm holding for precise depth implantation. During removal, the movable portion engages to reduce clamping force, making removal easy without compromising precision.
Solution Approach 2:
The clamping force parameter is dynamically adjusted through the engagement mechanism. The movable portion's engagement with the clamping portion changes the force parameter from high (for precise implantation) to low (for easy removal), resolving the contradiction between precision and ease of removal.
Data Source
AI summary
An insertion device for inserting a medical device into a living body includes: a needle portion internally defining an accommodation space configured to accommodate the medical device and configured to be inserted into a living body together with the medical device accommodated in the accommodation space; and a movable portion that is movable with respect to the needle portion in the accommodation space in a direction of insertion of the needle portion. The needle portion comprises a clamping portion configured to change a form in the accommodation space between a first form in which the clamping portion clamps the medical device accommodated in the accommodation space and a second form in which the clamping portion does not clamp the medical device accommodated in the accommodation space. The movable portion engages the clamping portion to change the form of the clamping portion from the first form to the second form.