Tissue Separation Device With Expandable Inner Structure
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Solution Overview
Problem
Existing tissue separation devices for treating urinary incontinence are invasive and burdensome, requiring large incisions and significant tissue dissection, which leads to high friction and difficulty in smooth dissection, and increased patient invasiveness.
Innovation Solution
A tissue separation device with an expandable inner structure and a deformation part that allows the expansion part to move relative to the deformation part without moving the deformation part relative to the body, using a restriction member and wires that expand in a specified direction to dissect tissue smoothly and minimally invasively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the expansion part is moved while keeping contact with the biological tissue to dissect the tissue, then the tissue can be separated, but the friction between the expansion part and the biological tissue is great, making it difficult to smoothly dissect the biological tissue
Solution Approach 1:
The device is divided into two separate functional structures: the expansion part (inner structure) that expands to separate tissue, and the deformation part (outer structure) that is inserted into the body. By segmenting these functions, the expansion part can expand without friction against tissue, while the deformation part handles the insertion and positioning without requiring tissue contact for dissection.
2Ease of manufacture
If large incisions and significant tissue dissection are performed to indwell the sling, then the sling can be implanted, but the invasiveness to the patient is great and the burden on the patient is heavy
Solution Approach 1:
The expansion part is nested within the deformation part during insertion. The entire assembly is introduced through a minimally invasive puncture, with the inner expansion structure contained within the outer deformation structure. This nested configuration allows the device to be delivered through small access points while maintaining full functionality for tissue separation and sling implantation.
Solution Approach 2:
The deformation part is inserted into the body first through a puncture, creating a delivery pathway and positioning the expansion part at the target location before the actual tissue separation and sling implantation occur. This preliminary positioning action enables subsequent minimally invasive deployment of the expansion mechanism.
3Ease of manufacture
If the expansion part is expanded to separate biological tissue, then the tissue can be dissected, but the invasiveness to the patient is great and the burden on the patient is heavy
Solution Approach 1:
The expansion part transitions from a compressed delivery state to an expanded working state after being positioned within the deformation part. This dynamic transformation allows the device to achieve effective tissue separation through controlled expansion of the inner structure, rather than requiring large incisions or rigid dissection instruments.
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
Enables smooth and minimally invasive tissue dissection, reducing the burden on the patient and minimizing tissue damage, while allowing for effective implantation of supportive slings between the urethra and vagina.
Implementation Method 1
an outer structure disposed outside of the inner structure, the outer structure having a deformation part into which the expansion part is inserted, which deforms following up to a deformation of the expansion part
Data Source
AI summary
A tissue separation device includes: a sheath; a tube having a deformation part; a restriction member; and an inner structure. The tissue separation device is used in an assembled state where the tube is movably inserted in the sheath, the restriction member is inserted in the tube, and the inner structure is movably inserted in the restriction member. The inner structure includes: wires and which are expandable and contractible; an operation unit which operates expansion of the wires; a tubular body; and a traction shaft. The wires are expanded by being curved so as to protrude in opposite directions. When dissecting a biological tissue, the wires in an expanded state are moved within the tube in relation to the tube, without moving the tube relative to the living body.