Medical Suturing Device with Deformable Needle Tips
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Solution Overview
Problem
Conventional medical suturing devices face challenges with high puncture resistance and pain infliction due to difficulties in reliable engagement of the loop body and suture, especially when the interval between puncturing needles is large, making it hard to form a sufficient loop body within internal organs.
Innovation Solution
A medical suturing device featuring a retrieval puncturing needle with an elastically deformable annular engagement member and a hollow tube with an arc-shaped distal tip that can deform into a straight shape, allowing for easier suture engagement and reduced needle resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the distal tip of the puncturing needle is bent to face sideways to enable loop body and suture engagement, then reliable engagement is achieved, but puncture resistance increases and puncture becomes difficult
Solution Approach 1:
The puncturing needle features a flexible distal tip that can dynamically change its orientation. During puncture, the tip remains straight to minimize resistance, and after puncture, it can be bent to face sideways to enable reliable loop body and suture engagement. This dynamic adaptability resolves the contradiction between puncture ease and engagement reliability.
Solution Approach 2:
The needle tip's geometric parameter (orientation angle) is changed after puncture to achieve engagement. The tip transitions from a straight configuration (0 degrees to tissue surface) during puncture to a sideways-facing configuration (approximately 90 degrees) for engagement, allowing both low puncture resistance and reliable engagement to be achieved at different stages.
2Adaptability or versatility
If the interval between two puncturing needles is set large to accommodate organ size variations, then adaptability improves, but the loop body size must be increased making it impossible to form sufficient loop within narrow spaces
Solution Approach 1:
The needle interval is made adjustable rather than fixed. The puncturing device can dynamically adjust the distance between the two needles based on the specific organ size and anatomical constraints, allowing adaptation to both large and narrow spaces without requiring a fixed large loop body configuration.
Solution Approach 2:
The suturing function is segmented into two independent puncturing actions rather than requiring a fixed dual-needle structure. This allows the effective interval between puncture points to be independently controlled and adjusted based on anatomical conditions, enabling adaptation to various organ sizes without compromising loop formation capability.
3Reliability
If the loop body size is increased to match large needle interval, then engagement reliability improves, but the device cannot form sufficient loop in narrow organ spaces
Solution Approach 1:
The engagement mechanism is made dynamic and adaptable to the available space. Rather than requiring a fixed large loop body, the system can adjust the loop formation process based on the anatomical space available, enabling reliable engagement whether in narrow or wide organ spaces through controlled manipulation of the flexible needle tips and suture material.
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 reduces puncture resistance and patient discomfort while enabling reliable suture engagement, accommodating various organ sizes without altering the annular engagement member's size, and facilitates easy knotting of suture ends for secure anchoring.
Implementation Method 1
an annular engagement member which is elastically deformable into a straight shape... a distal tip portion having an arc shaped region elastically deformable into a straight shape
Data Source
AI summary
The present invention provides a medical suturing device structured with a retrieval puncturing needle formed with through-hole; a retrieval member able to be inserted through through-hole; an insertion puncture needle formed with through-hole; a hollow tube that can be inserted through insertion through-hole, and the distal tip of which is formed into a deformable bent portion; and a suture that can be inserted through the inside of hollow tube. The retrieval member is structured with an annular engagement member that can be deformed into a straight shape, a rod member that is connected to annular engagement member, and a grip that is provided with a mark. The mark is furnished on hollow tube, such that when retrieval puncturing needle and insertion puncture needle are in a condition where mark and mark are facing each other, the upper supporter and lower supporter can be detachably attached.