A multiangular puncture outfit sealing film with grooves
A technology of sealing film and puncture device, which is applied in the direction of puncture needle, puncture needle, medical science, etc., can solve the problem of large radial force on the sealing lip 734
Active Publication Date: 2017-03-22
5R MED TECH CHENGDU CO LTD
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- Abstract
- Description
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- Application Information
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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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[0070] 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.
[0071] Figure 5 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 multiangular puncture outfit sealing film with ribs. The sealing film comprises a proximal opening, a distal hole and a sealing wall extending from the distal hole to the proximal opening. The distal hole is formed via a sealing lip and is used for accommodating an inserted instrument and forming air-tight seal; the sealing lip comprises a central axis and a cross plane substantially perpendicular to the axis; the sealing wall comprises a proximal face and a distal face; the sealing wall comprises a protruding edge, a main rotation wall and a plurality of reverse grooves; the main rotation wall comprises a first rotation wall extending from the sealing lip to the protruding edge and a second sealing wall extending from the protruding edge to the sealing lip; the first sealing wall and the cross plane form a first angle and a second rotation wall and the cross plane form a second angle, wherein the first angle is less than the second angle and is less than 90 degrees; the grooves have the functions of increasing the circumferential circumference, reducing an enclosure area, improving the lubrication reliability, improving the axial extensional rigidity and the like, so that the frictional resistance and stick slip can be reduced greatly.
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): A61B17/00A61B17/34
CPCA61B17/00234A61B17/3421A61B17/3462A61B17/3494A61B17/3498A61B2017/0034A61B2017/00862A61B2017/3464A61B17/00A61B17/34
Inventor 朱莫恕
Owner 5R MED TECH CHENGDU CO LTD