Hourglass type sealing membrane comprising grooves and assembly
A technology for sealing components and sealing membranes, which is applied in medical science, surgery, trocars, etc., and can solve the problems of large radial force on the sealing lip 734
Active Publication Date: 2016-11-23
5R MED TECH CHENGDU CO LTD
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Problems solved by technology
The 5mm instrument has a large radial space in the 12mm casing, which makes the radial force of the sealing lip 734 larger
[0020] In summary, so far, there is no sleeve assembly that can effectively solve the aforementioned problems
Method used
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[0057]Embodiments of the present invention are disclosed herein, however, it is to be understood that the disclosed embodiments are merely exemplary of the invention, which may be practiced in various ways. Therefore, this disclosure is not to be interpreted as limiting, but merely as a basis for the claims and as a basis for teaching one skilled in the art how to use the invention.
[0058] figure 2 The overall structure of the trocar is depicted. A typical trocar includes a trocar 10 (not shown) and a cannula assembly 20 . Cannula assembly 20 has an open proximal end 192 and an open distal end 31 . In a typical application, the puncture needle 10 passes through the cannula assembly 20, and then penetrates the entire abdominal wall through the skin opening and enters the body cavity. Once in the body cavity, the introducer needle 10 is removed leaving the cannula assembly 20 as a conduit for the instrument to and from the body cavity. The proximal end 192 is outside the ...
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The invention relates to a hourglass type sealing membrane comprising grooves and an assembly. The sealing membrane comprises a near end opening, a far end hole and a sealing wall extending from the far end hole to the near end opening. The sealing wall is provided with a near end face and a far end face. The far end hole is formed by a sealing lip and used for containing an inserted instrument and forming air-tight sealing. The sealing wall is a seamless sealing body formed by a plurality of forward grooves and a plurality of reverse grooves in a forward-reverse alternate mode by surrounding the sealing lip. The forward groove is sunken from the near end face to the far end face of the sealing wall, the opening faces the near end face, the reverse groove is sunken from the far end face to the near end face of the sealing wall, and the opening faces the far end face; the sealing wall is in a hourglass shape on the whole; the sealing membrane further comprises an annular wall formed by intersecting the forward groove with the reverse groove. Accordingly, frictional resistance can be greatly reduced, stick slip is reduced, and meanwhile the introversive probability of the sealing membrane is reduced or the operation comfort obtained after introversion of the sealing membrane is improved.
Description
technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a sealing structure of a trocar. Background technique [0002] A trocar is a surgical instrument used to establish an artificial channel into a body cavity in minimally invasive surgery (especially hard tube endoscopic surgery). Usually consists of a cannula assembly and a puncture needle. Its general clinical use method is: first cut a small opening on the patient's skin, then pass the puncture needle through the cannula assembly, and then penetrate the abdominal wall through the skin opening and enter the body cavity together. Once in the body cavity, the needle is removed, leaving the cannula assembly as a channel for the instrument to enter and exit the body cavity. [0003] In rigid endoscopic surgery, it is usually necessary to establish and maintain a stable pneumoperitoneum to obtain sufficient operating space. Cannula assemblies usually consist of a cannula,...
Claims
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IPC IPC(8): A61B17/34A61B17/00
CPCA61B17/00234A61B17/3417A61B17/3421A61B17/3423A61B2017/0034A61B2017/3464
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD