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Puncturing device, sealing assembly and sealing film for puncturing device

A technology of sealing membrane and trocar, applied in the directions of puncture needle, puncture needle, trocar, etc., to achieve the effect of increasing tensile stiffness, reducing frictional resistance, and reducing stick-slip

Inactive Publication Date: 2018-10-16
FENGH MEDICAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In the existing sealing membrane design, it is difficult to take into account the sealing reliability, switching convenience and operating comfort at the same time. Therefore, it is urgent to make improvements on the basis of the existing design in order to achieve a more ideal effect

Method used

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  • Puncturing device, sealing assembly and sealing film for puncturing device
  • Puncturing device, sealing assembly and sealing film for puncturing device
  • Puncturing device, sealing assembly and sealing film for puncturing device

Examples

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Embodiment Construction

[0032] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.

[0033] For easier understanding, first set the side close to the clinician's operation as the proximal end, and the side away from the clinician's operation, that is, the side close to the patient's body, as the distal end. combine figure 1 , the upper part of the figure represents the end close to the clinician's operation, which is the proximal end; while the lower part of the figure is the end in contact with the patient's body, which is considered the distal end. see figure 1 Shown is the overall structure of the trocar 100 in the preferred embodiment of the present invention. A typical trocar 100 includes a puncture needle 1 and a cannula assembly 2 , and...

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Abstract

The invention discloses a sealing film for a puncturing device. The sealing film includes a proximal opening, a distal opening and a sealing wall extending from the distal opening to the proximal opening. The distal opening is formed by a sealing lip for accommodating an inserted apparatus and forming hermetic seal. The sealing wall includes a proximal surface facing towards the proximal opening and a distal surface deviating from the proximal opening. The sealing wall is provided with a plurality of protruding portions, the protruding portions extend radially from the distal opening to the proximal opening, the thickness of the protruding portions is greater than the average thickness of the sealing wall, and the protruding portions are disposed on the distal surface and / or disposed on the proximal surface. The protruding portions disposed on the distal surface increase the thickness of a local area of the distal surface, increase the tensile rigidity of the sealing film in the axialdirection, and reduce the true contact area between an instrument and the sealing film, therefore the frictional resistance and stick slip are reduced, and at the same time, the probability of occurrence of sealing film introversion is reduced.

Description

technical field [0001] The invention relates to a minimally invasive surgical instrument, in particular to a puncture device, a sealing assembly and a sealing film for the puncture device, belonging to the field of medical devices. Background technique [0002] A trocar is a surgical instrument used in minimally invasive surgery (especially rigid endoscopic surgery) to establish an artificial channel into a body cavity. 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 drive the cannula assembly to penetrate the abdominal wall through the skin opening and enter the body cavity. Once in the body cavity, the needle can be 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A61B17/34
CPCA61B17/34A61B17/3417A61B17/3421A61B17/3462A61B2017/3419A61B2017/3464
Inventor 孙宝峰马猛
Owner FENGH MEDICAL CO LTD
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