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Ring type sealing device and trocar for trocar

A technology of sealing device and trocar, which is applied in the field of trocar to achieve the effect of maintaining dynamic sealing performance, increasing resistance and good dynamic sealing performance

Active Publication Date: 2016-03-02
GUANGZHOU T K MEDICAL INSTR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Apparently, the radial sealing device and the puncture device of the prior art cannot meet this requirement, and thus need to be improved.

Method used

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  • Ring type sealing device and trocar for trocar
  • Ring type sealing device and trocar for trocar
  • Ring type sealing device and trocar for trocar

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] Embodiment 1: The 4-lobe annular sealing device of the present invention of the shaft-shaped dynamic connection mechanism

[0089] refer to Figure 2-1 to Figure 2-9 , according to the technical scheme of the present invention, design concrete part drawings.

[0090] The guide block (11), the connection locking mechanism (4), and the translation slider mechanism (5) are made of medical polymer materials, and the materials are selected from: including but not limited to, medical PP, medical PE, medical PU, medical PA, medical PC, medical PTFE and other medical materials. Wherein, the guide surface of the guide block (11) can also be provided with super-slippery material coating to reduce the frictional resistance when the surgical instrument moves.

[0091] The sealing ring (3) is made of medical elastic materials, including but not limited to flexible medical materials such as medical silicone, medical rubber, medical polyurethane, and medical latex.

[0092] When as...

Embodiment 2

[0104] Embodiment 2: The sealing device of the wedge-shaped positioning groove of the present invention

[0105] refer to Figure 3-1 to Figure 3-4 , The technical principle of this embodiment is the same as that of Embodiment 1, the only difference is that the positioning groove (10) adopts a wedge-shaped structure. The purpose of using the wedge-shaped groove is: when the sealing ring is compressed and fixed by the connection locking mechanism (4) to form a sealing structure, due to the pressure of the upper and lower hypotenuses, the sealing ring is squeezed from the outside to the inside, and the sealing ring ( 3) Surrounding force to the surgical instrument (8).

[0106] In this embodiment, the angle α between the upper edge (101) of the positioning groove (10) and the vertical bottom edge of the positioning groove is between 90°~30°, and the optimum value is between 87°~45°; the positioning groove ( The angle β between the bottom edge (102) of 10) and the vertical bott...

Embodiment 3

[0107] Embodiment 3: The sealing device of the present invention of the groove type dynamic connection mechanism

[0108] refer to Figure 4-1 to Figure 4-2 , the difference between this embodiment and Embodiment 1 is that the dynamic connection mechanism of Embodiment 1 uses a shaft-shaped connection mechanism, while in this embodiment, the elastic low-strength region (21) is formed by the groove (210) , as the dynamic connection structure (2).

[0109] When the surgical instrument (8) is inserted, the groove (210) is deformed, driving the guide block (11) and the sealing ring (3) to expand outward, the gap (12) increases, and the squeezed sealing ring (3) The overflow through the enlarged gap surrounds the outer sheath of the surgical instrument and plays a sealing role.

[0110] When the surgical instrument (8) is withdrawn, the guide surface at the lower end of the guide block (11) plays a guiding role, allowing the surgical instrument to withdraw conveniently. Under th...

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Abstract

The annular sealing device and the puncture device are used for the puncture device. The guide blocks of the guide mechanism are combined into a rotating structure with a large upper end, a small middle end, and a large lower end. The positioning groove is set on the waist of the guide block, and the bottom of the sealing ring is inlaid. In the positioning groove, surround the guide block from the outside to the inside. When the surgical instrument is inserted, the sealing ring squeezed in the positioning groove overflows from the gap between the guide blocks and surrounds the surgical instrument to form a seal. The sealing device of the present invention reduces the contact area between the sealing ring and the surgical instrument to the greatest extent, not only has a guiding function when the surgical instrument enters or exits, and is suitable for the insertion and withdrawal of surgical instruments of various shapes; The "soft-hard" friction zone between the surgical instruments can be transformed into the "hard-hard" friction zone between the plastic guide surface of the guide block and the metal sheath of the surgical instrument to the greatest extent, which greatly reduces the friction of the surgical instrument. Resistance to movement in seals and trocars. At the same time, the sealing device and the puncture device of the present invention can use surgical instruments with any diameter between 5 mm and 12 mm, with good sealing effect and low movement resistance.

Description

technical field [0001] The invention relates to a medical device, in particular to a sealing device of a trocar used in laparoscopic surgery and a trocar using the sealing device. Background technique [0002] Laparoscopic surgery has been more and more widely used. In order to avoid iatrogenic infection, the amount of disposable trocar (Trocar) used in laparoscopic surgery is also increasing. On the basis of ensuring the performance, the structure is simplified , reduce cost, improve performance, this trend has become the direction of trocar improvement. [0003] The sealing of the trocar in the prior art consists of a radial sealing device and an axial sealing device. [0004] There are many kinds of common axial sealing devices, namely check valves. One is a spring-loaded check valve, which pushes the baffle through the spring and presses the silicone sealing ring to form a seal. This one-way valve consists of a spring leaf, a baffle, and a silicone sealing ring. The s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61B17/34A61L31/02A61L31/04
CPCA61B17/3462A61B2017/3464A61B2017/349A61B17/3498
Inventor 周星李艳芳张建刚罗丽飞
Owner GUANGZHOU T K MEDICAL INSTR
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