Asymmetric Stitching Bead and Angled Vacuum Cap for Organ Tissue
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Solution Overview
Problem
Conventional stitching beads for internal organs are difficult to miniaturize and can move back into the organ tissue, leading to unstitched wounds, while conventional vacuum apparatuses for stitching struggle to prevent injury to other internal organs or blood vessels due to imprecise needle insertion depth.
Innovation Solution
A bead with a vertically oriented through hole and inclined ends to prevent re-entry into the organ tissue, combined with a vacuum cap having a suction hole at a right angle to the endoscope tube and an elastic door mechanism to control vacuum pressure and needle ejection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the conventional stitching bead is used with longitudinal orientation same as stitching fiber passing direction, then the bead can be discharged to the lower portion of organ tissue, but the bead may move upwards from the organ tissue and cause the suture to come unstitched
Solution Approach 1:
The bead is designed with asymmetric end configurations where one end has a larger radius of curvature than the other end. This asymmetric geometry prevents the bead from rotating or moving back into the organ tissue along the stitching fiber, while still allowing effective discharge to the lower portion of the organ tissue during the stitching operation.
2Reliability
If the conventional stitching bead has a complex structure, then it can maintain stitching function, but it is difficult to miniaturize the bead and limit the number of beads that can be inserted into one stitching needle
Solution Approach 1:
The invention extracts and retains only the essential functional feature of the bead (the through-hole for stitching fiber passage) while removing unnecessary complex structural elements. This simplified design maintains the bead's stitching function while enabling miniaturization and increasing the number of beads that can be inserted into one stitching needle.
3Length of moving object
If the vacuum cap is made longer to increase needle reach, then the needle can reach deeper into the organ tissue, but the vacuum cap length increases which may interfere with other internal organs or blood vessels
Solution Approach 1:
The suction hole is positioned at a location that is spatially separated from the needle ejection path by introducing a dimensional offset. The suction hole is located at a position that does not interfere with the needle's longitudinal movement, allowing the vacuum cap to maintain a compact length while still providing effective suction holding of the organ tissue.
4Reliability
If the suction hole is positioned in the vacuum cap, then the vacuum pressure can be applied to hold the organ tissue, but the suction hole may cause the stitching needle to injure other internal organs or blood vessels during insertion
Solution Approach 1:
The suction hole is positioned at a location that is spatially separated from the needle ejection path by introducing a dimensional offset. The suction hole is located at a position that does not interfere with the needle's longitudinal movement, allowing the vacuum cap to maintain a compact length while still providing effective suction holding of the organ tissue.
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 solution prevents unwanted unstitching and allows for miniaturization of the bead, while the vacuum cap effectively reduces the risk of injury to other organs or blood vessels by ensuring precise needle insertion and extended needle reach without increasing the vacuum cap's length.
Implementation Method 1
a vacuum cap 300 which is coupled to an end of the endoscope tube 200 and suction-holds a region on which an operation is to be performed
Implementation Method 2
The door is made of an elastic material, and is secured at an end thereof to an edge of the outlet hole
Data Source
AI summary
A bead for stitching, a vacuum cap for suction-holding an internal organ, and an apparatus for stitching an internal organ using the vacuum cap are disclosed. The bead includes a through hole which is formed vertically through the bead so that a stitching fiber passes through the bead. At least one of both ends of the bead is inclined relative to a transverse direction of the bead. The bead is shaped to pass through a hole formed in a stitching needle. That apparatus includes an endoscope tube having a stitching needle which is movable in a longitudinal direction thereof and a suction tube for drawing air, and a vacuum cap having at an end thereof a fastening hole to which the endoscope tube is fastened. A suction hole is formed in the vacuum cap in a direction crossing the fastening hole.