Suturing Device Slider Control for Anchor Release Precision
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Solution Overview
Problem
Existing suturing devices for perforations in lumens like the stomach or intestine face challenges in securely releasing and locking anchors, leading to inefficient tissue suturing due to unwanted movement of the sliding portion during anchor release.
Innovation Solution
A suturing device with a hollow tip member, a wire for releasing anchors, a flexible tube, and a sliding portion with a slider control mechanism that deactivates unwanted sliding movements, ensuring secure anchor release and tissue suturing by using a stopper with an elliptical insertion hole to manage the suture thread effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the slider is allowed to move freely with respect to the main body during anchor release, then the anchor release operation becomes simpler, but unwanted sliding movements occur that reduce suture precision
Solution Approach 1:
The slider control portion dynamically changes the degree of freedom of the slider based on the operational phase. During anchor release, the slider can move freely in the axial direction to facilitate operation. During suture tightening, the slider control portion restricts axial movement to prevent unwanted sliding and ensure precision. This dynamic control resolves the contradiction by adapting the mechanical constraints to the specific operational requirements.
2Manufacturing precision
If the slider is constrained to prevent unwanted sliding movements, then suture precision is improved, but the ease of anchor release operation is reduced
Solution Approach 1:
The slider control portion implements phase-dependent mechanical constraints. In the anchor release phase, the control portion is configured to allow free axial movement of the slider, prioritizing ease of operation. In the suture tightening phase, the control portion activates to constrain axial movement, prioritizing suture precision. This dynamic switching resolves the contradiction by providing the appropriate degree of freedom for each operational phase.
3Adaptability or versatility
If the sliding portion can move freely in the axial direction, then the device flexibility is improved, but control over the suture thread is reduced
Solution Approach 1:
The slider control portion dynamically adjusts the mechanical constraints on the sliding portion based on the operational phase. During anchor release, the control portion allows free axial movement to maintain device flexibility and ease of operation. During suture tightening, the control portion restricts axial movement to ensure precise control over the suture thread. This dynamic control strategy resolves the contradiction by providing flexibility when needed and precision when required.
Data Source
AI summary
A suturing device that sutures tissues by releasing a suture unit includes: a first anchor and a second anchor included in the suture unit; a hollow needle receiving the first and second anchors inside of the needle; a tube which is fixed to a proximal end of the needle; a wire inserted into the tube and the needle; a first sheath through which the tube and the needle are inserted; an operating portion main body fixed to a proximal end of the first sheath; a slider fixed to a proximal end of the tube and configured to move forward and backward freely in a sliding manner with respect to the operating portion main body; a slider control portion configured to regulate movement of the slider with respect to the operating portion main body at all times; a handle portion provided in the slider; and a deactivation member.