RU131961U1 - TROCAR - Google Patents

Abstract

A trocar comprising a housing with a lid with a central axial hole, the inner end of which has a tube with an oblique cut, adjacent to a flap valve located inside the tube, characterized in that the flap valve is provided with a cylindrical side surface covering the tube with an annular groove in which an annular protrusion of the side surface of the valve is placed, while on the side surface of the valve an orienting protrusion is made, and on the outer surface of the tube a corresponding orienting groove is external the surface of the flap valve has a stiffener, and a fuse is placed in the hole on the surface of the flap valve, the cover is threaded, and its outer end is provided with a seal.

Description

The utility model relates to medical equipment, namely to surgical instruments intended for use in endoscopic surgery (laparoscopy), the function of which is the controlled penetration through the abdominal wall into the cavity, as well as the creation, preservation and sealing of the instrument channel.

A trocar is designed to create an operating space and provide access to it. Through the channel of the tube of the trocar, instruments are introduced into the operating space to create an exposure, dissection of tissues, sanitation of cavities, electrocoagulation, etc.

A single-use trocar is known, including an endoscopic port made in the form of a pipe with a channel for holding a tool divided by a flange into intracavitary and external parts, and a stylet made in the form of a rod bounded from one end by a tip with a point and from the other end by a handle, in which on the wall of the outer part of the pipe there is an annular thinning in the form of a belt made for pinching with fingers or a tool and sealing the pipe, the length of the belt corresponding to the anatomical the size of the fingers of surgeons or 2-3 calibers of the pipe. The nozzle may be made of flexible polymeric material, and the stylet C may be made of rigid polymeric material, the diameter of the stylet stem being equal to the diameter of the nozzle channel, the diameter of the tip is made larger than the diameter of the nozzle in the area adjacent to the tip, on the stylet rod, in its interface with with a tip, an annular protrusion is made, and a corresponding cavity is made on the wall of the pipe channel.

The end surface of the protrusion on the rod is made in the form of a truncated cone with a vertex facing the tip, and the corresponding end surface of the hollow on the wall of the pipe channel is made in the form of a truncated cone with a vertex facing the port flange; a plug is replaced on the end of the endoscopic port and is replaced by a fitting. . (RF patent No. 2315575, А61В 17/34, published on January 27, 2008).

Technical solutions for patents US 8052599, US 8221364, patent application US 2012277542 are devoted to improving the reliability of trocars and their tightness.

Closest to the claimed is a trocar, consisting of a housing with a lid having a central axial hole through which the stylet, tube and valve are inserted. The cover is equipped with a tube installed inside the housing with an oblique cut at the working end at an angle of 45 ° to its axis, on which there is an end flap valve adjacent to it. The tube and valve are made integrally of elastic rubber, and the diameter of the central axial hole of the cap is less than the inner diameter of the tube. (RF patent No. 2212199, А61В 17/34, publ. September 20, 2003).

The task, the solution of which is aimed at creating a real utility model, is to create a simple, reliable and easy-to-use trocar.

The problem is solved in that in a trocar containing a housing with a lid with a central axial hole, the inner end of which has a tube with an oblique cut adjacent to a flap valve located inside the tube, the flap valve is provided with a cylindrical side surface covering the tube with an annular a groove in which an annular protrusion of the lateral surface of the valve is placed, wherein an orienting protrusion is made on the lateral surface of the valve, and correspondingly a guiding groove, the outer surface of the flap valve has a stiffener, and a fuse is placed in the hole on the surface of the flap valve, the cover is threaded and its outer end is provided with a seal.

It is envisaged that a fuse is provided to the openings of the flap valve of the sealing element.

A general view of the utility model is shown in figure 1, figure 2 shows a General view of the flap valve.

In figures 1, 2 presents the following elements of the trocar:

1. The body of the trocar;

2. Cover;

3. Handset;

4. Petal valve;

5. Tube;

6. The lateral surface of the valve;

7. The annular protrusion of the side surface of the valve;

8. The orienting ledge;

9. Orienting groove;

10. Stiffener;

11. Fuse;

12. Seal;

The trocar is used as follows.

To prevent gas leakage from the abdominal cavity and ensure tightness, the cover 2 is threaded and provided with a seal 12.

For proper placement of the valve 4 relative to the oblique cut on the tube 3, align the orienting protrusion 8 on the side surface 6 with the corresponding orienting groove 9 on the outer surface of the tube. The annular protrusion of the side surface 9 of the valve 4 is placed in the annular groove of the tube 3, which prevents the valve 4 from jumping off the tube 3.

To carry out surgery at the puncture site, the patient’s skin is cut by 1-1.5 cm. A trocar is inserted, a stylet is inserted into the seal opening 12 on the threaded cover 2.

After a sufficient introduction of the trocar into the body cavity, the stylet is removed from the lumen of the seal 12.

Due to the difference in pressure in the abdominal cavity and atmospheric pressure, as well as due to the elastic properties of rubber, the flap valve 4 is tightly pressed against the oblique section of the tube 3 and the trocar is sealed.

In a similar way, the introduction and removal through the trocar of various instruments and laparoscopes necessary for surgical intervention is carried out.

The petal valve 4 is not damaged by the sharp end of the stylet due to the presence of a fuse 11. The outer surface of the flap valve 4 has a stiffener 10, which provides it with additional rigidity, which increases the service life of the device.

The claimed design of the trocar allows you to maintain a level of positive pressure in the abdominal cavity all the time laparoscopic surgery is performed, which is important for quick and clear completion of the operation. When using the latest generation of devices, there is practically no loss of air or gas from the abdominal cavity, which also prevents accidental injury to healthy tissues.

The trocar has a simple design, which reduces its cost and simplifies manufacturing technology, as well as provides ease of disassembly, washing, sterilization and assembly.

The absence of the need to perform additional manipulations with the instrument introduced into the working channel accelerates the procedure and reduces tissue trauma.

The trocar has wide functionality. It allows you to enter various instruments into the body cavity to perform the necessary manipulations, including tissue extraction, excluding damage and disruption.

The valve mechanism ensures tightness both when the tool is inserted into the trocar’s working channel and without it.

Claims (1)

A trocar comprising a housing with a lid with a central axial hole, the inner end of which has a tube with an oblique cut, adjacent to a flap valve located inside the tube, characterized in that the flap valve is provided with a cylindrical lateral surface covering the tube with an annular groove in which an annular protrusion of the lateral surface of the valve is placed, while an orienting protrusion is made on the lateral surface of the valve, and a corresponding orienting groove is external on the outer surface of the tube; the surface of the flap valve has a stiffener, and a fuse is placed in the hole on the surface of the flap valve, the cover is threaded, and its outer end is provided with a seal.

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