Helical Surgical Needle with Detachable Tip
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Solution Overview
Problem
Existing surgical needles face challenges in accessing and suturing less accessible wound areas, with difficulty in guiding threads predictably and safely returning from tissue without causing unnecessary damage.
Innovation Solution
A surgical needle with a helically shaped body and a detachable tip body, featuring a rotationally symmetrical design and a spreading fan, allows for controlled pressure distribution and thread guidance, ensuring predictable placement and easy retrieval with minimal tissue damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a straight needle is used for suturing, then the needle can be easily inserted, but it cannot achieve spiral suture path and has limited applicability for certain wound types
Solution Approach 1:
The needle is designed with a flexible helical section that can dynamically change its configuration. The needle can be inserted in a straight configuration and then rotated or deformed into a helical shape within the tissue, allowing it to adapt to different suture requirements without requiring multiple specialized needles.
2Reliability
If a detachable tip needle is used, then the needle can be safely returned from tissue, but the thread guidance becomes difficult and the thread can easily break
Solution Approach 1:
The thread is pre-positioned within the hollow needle shaft and securely held in place during insertion. The detachable tip is designed to separate after the needle has been fully inserted and the suture path established, eliminating the risk of tip damage during retrieval while maintaining thread security throughout the critical insertion phase.
3Manufacturing precision
If a helical needle is used for spiral suture, then the suture path can be controlled, but the needle cannot be easily returned from tissue without causing damage
Solution Approach 1:
The needle is divided into two separable parts: a helical section that creates the spiral suture path and a detachable tip section. After the helical section has established the suture trajectory, the tip can be detached and removed from the tissue separately, allowing the helical body to be retrieved safely without dragging the sharp tip through the tissue tract.
4Strength
If conventional needle holders are used, then the needle can be held securely, but they are not suitable for specialized needle designs
Solution Approach 1:
The needle holder is designed with a universal gripping mechanism that can accommodate both straight needles and helical needles with detachable tips. The holder grasps the needle shaft in a manner that is independent of the needle's distal configuration, allowing secure handling of various needle types without requiring specialized holders for each design.
Data Source
Figure 1~2
Figure 3~4
AI summary
The present invention relates to a surgical needle (10), which can be used to suture wounds in a medical application. More precisely, the present invention relates to a surgical needle that is connected to a thread (20) and that has a tip body (22), which bears the needle tip, and a needle body (12). The needle body (12) has a helical design and has an inner cavity. The needle body has a first end (16), which faces the tip body (22). The needle body has a second end (18), which is opposite the first end (16). The tip body (22) has a thread receptacle. The thread of the thread receptacle is fed from the first end (16) of the needle body to the second end (18) of the needle body through the cavity. The surgical needle is characterised in that the tip body is designed as a separate component, which is detachably connected to the needle body, and that the tip body has a shaft piece (24) and a connecting piece (26) and is rotationally symmetrical about an axis through the needle tip.