Lap fusion specimen bag and fetching device

Abstract

The invention discloses a lap fusion specimen bag, comprising a bag mouth which can be opened and closed, and a bag body extending from the bag mouth; the bag mouth comprises a surrounding tunnel, andthe bag body further comprises a bag bottom. The bag body comprises a sheet-like film, the film comprises a top edge connected to the tunnel and a first overlapping edge and a second overlapping edgeat two side edges of the top edge; the first overlapping edge and the second overlapping edge are overlapped with each other by folding the film along a virtual fold line and welded to a lap joint weld. The lap joint weld includes a weld zone and a transition zone, and the lap joint weld has a self-reinforcing effect to prevent breakage of the transition zone.

Description

[0001] This application is a divisional application of an invention patent application titled: A Lap-joint Fusion Specimen Bag and Retrieval Device, with an application date of March 6, 2017 and an application number of: 201710129505.1. technical field [0002] The invention relates to a minimally invasive surgical instrument, in particular to a specimen bag structure. Background technique [0003] In minimally invasive surgery (especially rigid endoscopic surgery), it is usually necessary to remove internal tissues or diseased organs through a small incision in the patient's skin or through a puncture catheter. How to safely and conveniently remove intracavitary tissue or diseased organs has always been a difficult problem in minimally invasive surgery. Since the first clinical application of rigid endoscopic surgery, a variety of special specimen bags for endoscopic surgery have been developed at home and abroad. Although the structures and usage methods of the specimen b...

AI Technical Summary

Problems solved by technology

However, excessive welding usually results in a significant thinning of the thickness of the local area where the film base material of the specimen bag transitions to the seam, thereby resulting in a significant reduction in the strength of the material in the area adjacent to the seam, and is prone to damage. This phenomenon is usually called "root". cut"

[0005] An ordinary technician can imagine that increasing the thickness of the film can strengthen the specimen bag. However, when the specimen bag is used in the aforementioned extraction device, due to the size limitation of the catheter, increasing the thickness of the film usually leads to the failure of the specimen bag to be accommodated in the catheter or cannot be removed from the catheter. launched in

The maximum thickness of the film of the specimen bag in the prior art is usually ≤0.1mm, and excessive welding usually causes the thickness of the aforementioned local area to decrease by 30% to 50%, which significantly reduces the strength of the specimen bag

So far, the probability of accidents where specimen bags break during clinical use is still high

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