CN201591540U - A minimally invasive surgical sheath - Google Patents

Abstract

The utility model relates to the technical field of medical equipment, and is a minimal invasive sheath for making operations through natural chamber ways of human bodies. The minimal invasive sheath is composed of a sheath tube (1), a sheath tube sealing cap (2) and a sheath tube core (3), wherein the sheath tube (1) is a cylinder hollow guide tube, and an external thread is arranged at the tail part (1.1); the sheath tube sealing cap (2)is engaged at the tail part (1.1) through an internal thread; a branched supporting tube (1.2) is arranged at the tail part (1.1) of the sheath tube (1), and the tube opening is an aeroperitoneum machine standard interface, and is covered by a cap (1.3) of the aeroperitoneum machine standard interface; the sheath tube core (3) is hollow in the cavity of the sheath tube (1), and is divided into a head part (3.1), a body part (3.2) and a handle (3.3); the head part (3.1) is conical; the handle (3.3) is arranged at a connection part (3.4)of the sheath tube (1) capable of connecting the sheath tube (1) and the sheath tube core (3) into a whole; and the cavity of the sheath tube core (3) is a guide wire passage way. The utility model has the advantages of simple structure, convenient use and good air sealing, and enables the minimal invasive through the natural chamber ways to become safe and easy.

Description

A minimally invasive surgical sheath

technical field

The utility model relates to the technical field of medical instruments, and relates to a minimally invasive surgical sheath for performing abdominal minimally invasive surgery through the natural cavity of a human body.

Background technique

Laparoscopic technique is a minimally invasive operation that has been widely used clinically, such as abdominal visceral biopsy, decompression of liver and kidney cysts, gallbladder and appendectomy, etc., often using laparoscopic technique. Laparoscopic techniques usually require 3 to 5 holes with a diameter of 5 to 20 mm to be made in the abdominal wall, and sleeves are placed in the holes. The sleeves are used to insert endoscopes and insert various surgical instruments. For the function of the channel, there is an interface on the cannula that can be connected with the insufflation machine. Use the insufflation machine to input _CO2 gas or connect the infusion tube and use the infusion pump to input normal saline to open up the space of the operation site to facilitate the operation. Although the laparoscopic technique is less traumatic than laparotomy, 3 to 5 holes need to be made in the abdominal wall, and scars are left after the operation. People try to perform abdominal visceral surgery through the natural orifices of the human body, such as: esophagus-stomach, urethra-bladder, vagina-uterus, rectum, etc. This intervention method has the advantages of less trauma and easy recovery, less postoperative pain, no scars on the body surface, etc., and does not have high requirements for the surgical environment, and can be used for first aid in special situations such as disaster-stricken areas or battlefields. In 2004, Kalloo et al. completed the first transgastric endoscopic surgery; Matthew T. Gettman et al. conducted animal experiments and tried to use various tubes with a diameter of 5mm-15mm as transurethra-bladder, vagina-uterus, and rectum. It is a safe channel for minimally invasive surgery, allowing endoscopes or surgical instruments to enter and exit safely. However, because these tubes are not airtight, the CO2 gas injected into the abdominal cavity during surgery is likely to leak, and the abdominal wall cannot be continuously stretched to ensure an ideal operation. In addition, because there is no introduction device, the operation is very inconvenient, such as inconvenient when installing or replacing tubes of different diameters, and there is no standard interface that can be connected with a standard insufflation machine, and it is also inconvenient to inject CO ₂ gas into the body. At present, there is no minimally invasive surgical sheath suitable for minimally invasive abdominal surgery that is convenient for safe operation and has good airtightness.

Contents of the invention

The purpose of the utility model is to provide a minimally invasive surgical sheath which is convenient for safe operation and has good airtightness.

The utility model is composed of a sheath tube, a sheath tube core, a standard interface cap of an insufflation machine, and a sheath tube sealing cap. The sheath tube is a cylindrical hollow catheter, and the tail is provided with an external thread. Matching, so that the sealing cap of the sheath can be tightened here, the tail of the sheath is provided with a bifurcated branch, and the nozzle is the standard interface of the insufflation machine, which is used to connect with the insufflation machine or infusion set, and the nozzle is provided with external threads , which matches the inner thread of the standard interface cap of the insufflation machine, so as to tighten the cap here; the sheath tube core is hollow, placed in the inner cavity of the sheath tube, divided into three parts: head, body and handle, the head is conical , the top is smooth and blunt, the outer diameter and length of the body match the inner diameter and length of the sheath tube. The sheath tube and the sheath tube core are connected as one by tightening, and the lumen of the sheath tube core is a guide wire channel. The sealing cap of the sheath tube is made of a material with excellent elasticity and tightness, such as thermoplastic elastic material, etc. It is provided with an internal thread, and is screwed tightly with the external thread at the tail of the sheath tube through the internal thread.

When in use, puncture and expand the natural orifice wall of the human body under the guidance of the endoscope as usual, place the guide wire through the natural orifice wall of the human body at the corresponding part of the operation, and then pass the combined minimally invasive surgical sheath through the sheath The guidewire channel of the stylet is placed along the guidewire, after the position is fixed, unscrew the handle of the stylet, withdraw the sheath stylet together with the guidewire, screw on the sealing cap of the sheath, and the insufflation machine standard at the end of the sheath The interface is connected to an insufflation machine to inflate, or connected to an infusion set to inject liquid, and then the surgical instrument is inserted into the surgical site through the sealing cap of the sheath tube, and the corresponding operation can be performed as usual. Since the standard interface of the insufflation machine is connected with the insufflation machine or the infusion set, not only will it not leak air or water, but it can be inflated or injected with liquid at any time as needed; Repeatedly passing through the sealing cap of the sheath tube, the sealing cap of the sheath tube can also ensure good sealing, thereby ensuring that there is a large enough operation space to carry out the operation, so that the operation can be carried out smoothly. If it is necessary to replace the minimally invasive surgical sheath of different specifications and models due to different surgical instruments, you can first unscrew the sealing cap of the sheath tube, insert the sheath tube core, and insert the guide wire through the guide wire channel of the sheath tube core to the surgical site. Fix the guide wire, then slowly withdraw the sheath tube core together with the sheath tube, and then insert the minimally invasive surgical sheath of the required specification and model according to the above method.

The utility model has the advantages of simple structure, convenient use and good sealing performance, which makes it safe and easy to perform minimally invasive surgery through the natural orifice.

Description of drawings

Fig. 1 is a schematic diagram of the combined structure of the sheath tube and the sheath tube sealing cap of the present invention when it is opened.

Fig. 2 is a structural schematic diagram of the sheath tube core of the utility model.

Fig. 3 is a schematic diagram of the combined structure of the sheath tube and the sheath tube core of the present invention.

Fig. 4 is a schematic diagram of the combined structure when the sheath tube of the present invention is covered with a sheath tube sealing cap.

Detailed ways

Now in conjunction with accompanying drawing and embodiment the utility model is described in detail.

The utility model is composed of a sheath tube 1, a sheath tube sealing cap 2 and a sheath tube core 3. The sheath tube 1 is a cylindrical hollow catheter. Matching, the tail of the sheath tube is provided with a bifurcated branch pipe 1.2, and its nozzle is the standard interface of the insufflation machine, and the interface is provided with external threads, which match the internal threads of the standard interface cap 1.3 of the insufflation machine; Placed in the inner cavity of the sheath 1, it is divided into three parts: the head 3.1, the body 3.2 and the handle 3.3. The head 3.1 is conical, the top is smooth and blunt, and the outer diameter and length of the body 3.2 are the same as the inner diameter and length of the sheath 1. Matching, the handle 3.3 is provided with a sheath tube connecting part 3.4, the internal thread of the connecting part matches the external thread of the sheath tube tail 1.1, so as to connect the sheath tube 1 and the sheath tube core 3 as a whole after being tightened; The lumen of the core 3 is a guide wire channel. The sheath tube sealing cap 2 is made of a material with excellent elasticity and tightness, and is provided with an internal thread, which is screwed to the sheath tube tail 1.1 through the internal thread.

Embodiment 1. A kind of minimally invasive operation sheath that carries out appendectomy through human rectum

The sheath tube 1 of the present utility model is made of PVC material, the length is 300mm, the outer diameter is 7.4mm, the inner diameter is 5.5mm, and the thread section length of the tail 1.1 is 4mm; , the outer diameter is 5.4mm; the total length of the sheath tube core 3 is 315mm, of which the head 3.1 is 8mm long, the body 3.2 is 300mm long, the outer diameter is 5.0mm, the inner diameter is 1.1mm, the handle 3.3 is 18mm in length, and the sheath tube connecting part 3.4 is 8mm long, The outer diameter is 10mm, and its inner diameter and inner thread match the thread section of the sheath tail 1.1; the sheath sealing cap 2 is made of thermoplastic elastomer material TPEE with excellent elasticity and sealing performance, the cap is 14mm high, and the top is 3.5mm thick. Its inner diameter and inner thread match the threaded section of the sheath tube tail 1.1; the insufflator standard interface cap 1.3 is 12mm high, and its inner diameter and inner thread match the outer diameter and thread of the insufflator standard interface of the branch pipe 1.2. The utility model can be made into different specifications and models as required.

Claims (1)

1. A minimally invasive surgical sheath, characterized in that it is made up of a sheath tube (1), a sheath tube sealing cap (2) and a sheath tube tube core (3), the sheath tube (1) is a cylindrical hollow catheter, and the tail (1.1 ) is provided with an external thread, which matches the internal thread of the sheath tube sealing cap (2), and the tail of the sheath tube is provided with a bifurcated branch pipe (1.2). External thread, which matches the internal thread of the standard interface cap (1.3) of the insufflation machine; the sheath tube core (3) is hollow, placed in the inner cavity of the sheath tube (1), divided into head (3.1), body ( 3.2) and the handle (3.3), the head (3.1) is conical, the top is smooth and blunt, the outer diameter and length of the body (3.2) match the inner diameter and length of the sheath (1), and the handle (3.3) is set There is a sheath connecting part (3.4), and the inner thread of the connecting part (3.4) matches the outer thread of the sheath tail (1.1), so that the sheath (1) and the sheath tube core (3) can be connected after being screwed tightly. One body; the inner cavity of the sheath tube core (3) is the guide wire channel; the sheath tube sealing cap (2) has good elasticity and tightness, and it is provided with an internal thread, which is screwed to the tail of the sheath tube (1.1) .

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