Improved fetching device for gastrointestinal surgery

Abstract

The invention discloses an improved fetching device for gastrointestinal surgery, which comprises a fetching bag, a pull wire and a hollow tube, the fetching bag comprises a bag opening capable of being opened and closed and a bag body formed by extending from the bag opening, and the bag opening comprises a surrounding tunnel; the elastic body 50 comprises an elastic ring, a first cantilever anda second cantilever, the first cantilever and the second cantilever extend to the near end, the elastic ring penetrates through a tunnel, and the first cantilever and the second cantilever are fixed in the fixed seat; the fetching bag is curled to wrap the periphery of the elastic ring to force the whole elastic ring to deform, so that the fetching bag and the elastic ring are accommodated in thehollow pipe; the elastic body is made of nickel-titanium alloy and has flexibility and shape memory; the hollow tube comprising a plurality of cuts; wherein the plurality of notches are approximatelyarranged in parallel in two rows or more rows, the plurality of notches cut the main pipe wall of the hollow pipe to form one or more easy-to-tear edges, and a plurality of connecting areas are formedbetween the easy-to-tear edges and the main pipe wall of the hollow pipe.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to an improved fetcher for gastrointestinal surgery. Background technique [0002] 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 retrieval bags for endoscopic surgery have been developed at home and abroad. Although the structures and usage methods of the retrieval bags are different, they can be generally divided into two categories: the first category, a single retrieval bag. US Patent No. 5,037,379 discloses a one-sided opening with a threaded retrieval bag. When in use, ...

AI Technical Summary

Problems solved by technology

[0003] So far, due to the high manufacturing cost of retrieval devices with a distraction mechanism, the use of retrieval devices with a distraction structure is high, and the proportion of use in developing or underdeveloped countries is very low

The manufacturing cost of a single retrieval bag is relatively low, but it is difficult to put it into the patient's body through the puncture channel when the single retrieval bag is clinically used, and it is usually easy to cause the single retrieval bag to be polluted twice before entering the patient's body, or to pass through the patient's body. Damaged by instruments during puncture channel, resulting in accidental rupture

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