Endoscopic Ligature Device Pledget Prevents Tissue Burying
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional ligature and suture devices for medical applications face challenges in preventing the burying of suturing members in biomedical tissue during procedures, particularly when using peroral endoscopy for treatments like gastroesophageal regurgitation, and in maintaining the desired bulging condition of tissue for an extended period.
Innovation Solution
A ligature and suture device with a distal end portion that includes a side aperture, hollow needles, and a pledget system, where the pledget is placed between the biomedical tissue and the suturing member to prevent burying, and features like a protective member, needle guide, and adjustable slit facilitate precise and reliable suturing, allowing for the maintenance of tissue bulging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a suturing member is used to suture biomedical tissue during peroral endoscopy, then the tissue can be ligatured or sutured to prevent regurgitation, but the suturing member may be buried in the tissue during the procedure
Solution Approach 1:
A pledget is introduced as an intermediary element between the suturing member and the biomedical tissue. The pledget is placed on the tissue surface before the suturing member penetrates, creating a protective layer that prevents direct contact and burying of the suturing member into the tissue while still allowing effective ligation.
2Ease of operation
If the distal end portion is connected by an elongated, narrow sheath to the operation portion, then the device can be inserted through the endoscope, but the operator cannot sense by hand the amount of force being applied to the tissue
Solution Approach 1:
The distal end portion is designed with a bulbous shape that replicates and amplifies the force applied by the operator through the narrow sheath. This bulbous structure acts as a mechanical amplifier, allowing the operator to sense the force being applied to the tissue through the endoscope interface, effectively copying the force sensation despite the elongated, narrow connection.
3Ease of operation
If the tissue is suctioned to create a bulging condition for suturing, then the suturing can be performed, but the desired bulging condition cannot be maintained for an extended period
Solution Approach 1:
The pledget is positioned in advance on the tissue surface before the suturing member is introduced. This preliminary placement of the pledget creates a protective barrier that maintains the bulging condition of the tissue during the suturing procedure and extends the duration for which the bulging is maintained, as the pledget continues to support the tissue morphology after the suturing is complete.
Data Source
AI summary
A ligature and suture device for medical application that ligatures or sutures biomedical tissue that has been suctioned by a suction device using a suturing member. The ligature and suture device includes an insertion portion having a lumen into which an endoscope can be inserted, and a distal end portion that is connected to the lumen and in which at least one side aperture is provided, at least one hollow needle that is able to support inside itself the suturing member, and that is placed inside the insertion portion such that a tip of the hollow needle is able to move between a first position, which is on a base end side of the side aperture, and a second position, which is on a distal end side of the side aperture, an operating section that performs an operation to move the needle, and at least one pledget that can be penetrated by the needle, and that is placed in a vicinity of the distal end of the side aperture so as to be freely removable from the distal end portion.