CN216603010U - Abdominal cavity puncture sheath - Google Patents

Abstract

The utility model relates to an abdominal cavity puncture sheath, and belongs to the technical field of medical instruments. Comprises a sheath tube, a movable sleeve, a cutting knife, an eccentric saccule and an outer supporting leg; a movable sleeve penetrates through the sheath tube, and a cutting knife is arranged in the movable sleeve; the outer side wall of one end of the sheath tube, which is far away from the operator, is provided with an eccentric balloon, and the end of the sheath tube, which is close to the operator, is provided with an air bag air inlet; the outer wall of the sheath tube is provided with a movable outer supporting leg. A cutting knife is arranged at one end of the movable sleeve far away from the operator in a penetrating way; one end of the movable sleeve close to the operator is provided with a return spring. The utility model provides the disposable visual abdominal cavity puncture sheath which can realize atraumatic puncture, no surgical scar and controllable bidirectional elastic fixation.

Description

a paracentesis sheath

technical field

The utility model relates to an abdominal cavity puncture sheath, which belongs to the technical field of medical devices.

Background technique

With the development and progress of medicine, the traditional open surgery is gradually replaced by the new minimally invasive surgery. For example, traditional open surgery has been replaced by laparoscopy (3D, 4D, robotics), and laparoscopic surgery has been successfully used in general surgery (gastrointestinal, hepatobiliary), urology, gynecology and other surgical departments. At present, laparoscopic surgery requires the use of abdominal puncture sheaths. Generally, each operation requires at least three puncture sheaths (5mm, 10mm, 12mm), and complex operations often require 5-6. However, the main shortcomings of the current puncture sheath are: 1. Outside the puncture sheath, there is a one-way thread structure (or step), that is, when puncturing, because the thread structure (or step) is small inward and slightly larger outward, so When the sheath enters, it is in the right direction, saves effort, and does not produce cutting effect, but when the sheath is pulled out at the end of the operation, because the direction of entry of the sheath is exactly opposite, the thread structure (or step) coming out is large at this time, so the thread of the sheath appears. (or ladder) has a cutting effect with human tissue and damages the tissue, and this channel is small and difficult to stop bleeding. Once a larger blood vessel or artery is damaged, there is a risk of secondary bleeding. There have been clinical reports of hemorrhagic shock after sheath removal. . 2. None of the currently used sheaths have fixing devices. Since the sheath is hollow, all surgical instruments need to be in and out through the sheath core during surgery, which is easy to drive the sheath to move in and out. Movement will inevitably affect the surgical operation; if the sheath moves outward, once the front end of the sheath moves to the muscle layer, the channel will be lost, and the instrument will not be able to reach the abdominal cavity smoothly. In order to prevent the sheath from moving outward, the current method adopted by clinicians is to suture the skin with a triangular needle and thread on the body surface, and then tie the suture to the thread structure (or step) of the sheath to prevent the sheath from moving outward. However, this method cannot stop the sheath from moving into the abdominal cavity. Once the sheath moves into the abdominal cavity, the clinician has only one way, that is, relying on the surgical assistant to pull the sheath outward to a suitable position by hand to facilitate the operation. 3, surgery to form "centipede" scars, affecting the appearance. With the improvement of living standards, people pay more and more attention to the appearance of postoperative scars, especially when young people expose their abdomens on the beach or in fashionable clothes, the visual impact of "centipede" scars often makes patients feel inferior. As mentioned in the above-mentioned defect 2, in order to prevent the sheath from moving outward, a triangle needle with thread is required to suture the skin. The triangular needle enters and exits the skin, and the wound presents an irregular triangle pattern, so all the needle eyes will have scar healing (that is, a point), and the postoperative puncture port can be sutured intradermally, and the postoperative scar will be a line. It forms a "centipede" shape. Therefore, there is an urgent need in the technical field for a peritoneal puncture sheath with no surgical scars, no damage to puncture, and controllable bidirectional fixation.

SUMMARY OF THE INVENTION

The purpose of the utility model is to solve the technical problem of how to obtain an abdominal cavity puncture sheath with no surgical scars, no damage to puncture, and controllable bidirectional fixation.

In order to achieve the purpose of solving the above-mentioned problems, the technical scheme adopted by the present invention is to provide an abdominal cavity puncture sheath, which includes a sheath tube, a movable sleeve, a cutting knife, an eccentric balloon and an outer support foot; Sleeve, a cutting knife is arranged in the movable sleeve; an eccentric balloon is arranged on the outer side wall of the end of the sheath tube away from the operator, and an airbag air inlet is arranged at the end of the sheath tube close to the operator; outer support feet.

Preferably, the end of the movable sleeve away from the operator is provided with a cutting knife; the end of the movable sleeve close to the operator is provided with a return spring.

Preferably, an airway is provided in the side wall of the sheath tube, one end of the airway is communicated with the eccentric balloon, and the other end of the airway is communicated with the airbag air inlet.

Preferably, an eyepiece is provided on the outer side wall of the end of the sheath tube away from the operator.

Preferably, the outer side wall of the sheath tube on the side close to the operator is provided with an outer thread; the outer support foot is provided with an annular fixing ring, and the fixing ring is provided with an inner thread; the outer support foot is movably connected by a thread on the outer wall of the sheath.

Preferably, the fixing ring of the outer support foot is provided with a support protrusion facing the patient for preventing the abdominal cavity puncture sheath from entering the abdominal cavity, and the support protrusion is set as an elastic support.

Preferably, the support protrusions are set as rectangular parallelepiped support feet parallel to the central axis of the sheath tube.

Preferably, the outer wall of the sheath between the support protrusion and the end of the sheath away from the operator is provided with a smooth and non-protrusions outer surface.

Preferably, the end of the sheath close to the operator is provided with a carbon dioxide gas inlet.

Compared with the prior art, the utility model has the following beneficial effects:

The utility model can solve the defects of the prior art, reduce the puncture resistance, and can also achieve visual puncture to achieve the effect of non-destructive puncture:

1. The utility model has no cutting damage: the front end of the abdominal cavity puncture sheath has no thread structure (or ladder), that is, the front section of the sheath is smooth, and there is no cutting damage in the tissue entering and exiting.

2. The fixation of the abdominal cavity puncture sheath of the present utility model does not require additional suture: on the back of the front end of the sheath, an eccentric small balloon (not a circle of balloons along the sheath, because the suture needle during the operation is a curved needle, is easy to scratch when pulled out). When the sheath enters the abdominal cavity, a small amount of inflation or saline is applied to the balloon, and the balloon is inflated to prevent the sheath from moving out. An external fixation device is designed at the end of the sheath. When the sheath enters the abdominal cavity and inflates the balloon or injects normal saline, gently pull the sheath outward to make the balloon close to the abdominal wall, and adjust the external fixation device to make the bottom of the external fixation device tight. It is attached to the skin to prevent the sheath from moving to the abdominal cavity. At this time, the sheath can be perfectly fixed without additional skin sutures, so there is no needle eye scar formation, and the trouble of "centipede" scars is relieved.

3. Controllable fixation: The outer wall of the sheath is provided with a thread structure of about 3cm long, and the external fixation device contains an internal thread structure. Folded or set to be elastic, when unfolded, it can meet the abdominal wall of 1cm (super thin people), so this sheath can meet most people.

4. Non-invasive puncture: The puncture needle is designed with an elastic structure, that is, when it is just attached to the skin, it is a plastic blunt tip, and the tip of the puncture sheath will not damage the skin. The canal is enlarged, which drives the sheath to pass through the skin, subcutaneous tissue, and muscle layer. Once it breaks through the peritoneal layer, it enters the abdominal cavity. At this time, there is no resistance in front of the blade, and the blade automatically retracts into the blunt plastic tip, and the blunt tip of the plastic tip drives the sheath into the abdominal cavity. Abdominal cavity, will not damage the intestine, etc., play a protective role.

5. Whole-process visual device: This device is equipped with a portable flexible camera, which can guide the sheath to complete the channel establishment under direct vision, and the whole process can be visualized in real time, avoiding blood vessels, reducing damage, and being safe and reliable.

Description of drawings

Fig. 1 is a schematic diagram of the structure of the abdominal cavity puncture sheath of the present invention.

Reference numerals: 1. Abdominal puncture sheath; 2. Sheath tube; 3. Movable sleeve; 4. Return spring; 5. Cutting knife; 6. Eccentric balloon; 7. External support foot; 8. Eyepiece; Air inlet; 10.CO ₂ air inlet.

Detailed ways

In order to make the present utility model more obvious and easy to understand, the preferred embodiments and accompanying drawings are described in detail as follows: As shown in Figure 1, the technical solution adopted by the present utility model is to provide a kind of abdominal cavity puncture sheath 1, including a sheath Tube 2, movable sleeve 3, cutting knife 5, eccentric balloon 6 and outer support foot 7; the sheath tube 2 is provided with a movable sleeve 3, and the movable sleeve 3 is provided with a cutting knife 5; the sheath tube 2 is away from the operation An eccentric balloon 6 is arranged on the outer side wall of one end of the operator, an airbag air inlet 9 is arranged at the end of the sheath tube 2 close to the operator; The end of the movable sleeve 3 away from the operator is provided with a cutting knife 5 ; the end of the movable sleeve 3 close to the operator is provided with a return spring 4 . An airway is provided in the side wall of the sheath tube 2 , one end of the airway is communicated with the eccentric balloon 6 , and the other end of the airway is communicated with the airbag air inlet 9 . An eyepiece 8 is provided on the outer side wall of the end of the sheath tube 2 away from the operator. The outer side wall of the sheath tube 2 close to the operator is provided with an outer thread; the outer support foot 7 is provided with an annular fixing ring, and the fixing ring is provided with an inner thread; the outer support foot 7 is movably connected to the outer side wall of the sheath tube 2 through threads superior. The fixing ring of the outer support foot 7 is provided with a support protrusion facing the patient for preventing the abdominal cavity puncture sheath 1 from entering the abdominal cavity, and the support protrusion is set as an elastic support. The support protrusion is set as a rectangular parallelepiped support foot parallel to the central axis of the sheath tube 2 . The outer wall of the sheath tube 2 between the support protrusion and the end of the sheath tube 2 away from the operator is provided with a smooth outer surface without protrusions. The end of the sheath tube 2 close to the operator is provided with a carbon dioxide gas inlet 10 .

The use process of this utility model:

1. The doctor holds the abdominal cavity puncture sheath 1, touches the end away from the operator to the position of the abdomen to be punctured, and punctures with force, the movable sleeve 3 compresses the return spring 4 and retreats, exposes the cutting knife 5, and cuts the abdominal cavity.

2. The end of the abdominal cavity puncture sheath 1 away from the operator follows the cutting knife 5 into the abdominal cavity. Because the front resistance disappears, the return spring 4 resets the movable sleeve 3 and wraps the cutting knife 5 to prevent the cutting knife 5 from damaging other tissues;

3. Inject gas into the eccentric balloon 6 through the airbag air inlet 9, and the eccentric balloon 6 expands to prevent the abdominal cavity puncture sheath 1 from moving outside the body;

4. Rotate the fixing ring of the outer support foot 7, and put the support foot on the outside of the abdomen; prevent the abdominal cavity puncture sheath 1 from moving into the body;

5. During the puncture process, it can be observed through the eyepiece 8 to avoid damage to other tissues; the puncture is completed.

6. During the operation, the carbon dioxide gas is input into the abdominal cavity through the carbon dioxide gas inlet 10 provided at one end of the sheath tube close to the operator, so that the abdominal cavity is raised, and a pneumoperitoneum is established to facilitate subsequent operations.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention in any form or substance. It should be pointed out that for those of ordinary skill in the art, without departing from the present invention, Several improvements and additions can also be made, and these improvements and additions should also be regarded as the protection scope of the present invention. All those skilled in the art, without departing from the spirit and scope of the present utility model, can utilize the above disclosed technical content to make some changes, modifications and equivalent changes of evolution, all of which are the present utility model. At the same time, any modification, modification and evolution of any equivalent changes made to the above-mentioned embodiments according to the essential technology of the present invention still belong to the scope of the technical solution of the present invention.

Claims (9)

1. an abdominal cavity puncture sheath, characterized in that: comprising a sheath tube, a movable sleeve, a cutting knife, an eccentric balloon and an outer support foot; the sheath tube is provided with a movable sleeve, and the movable sleeve is provided with a cutting knife; An eccentric balloon is arranged on the outer side wall of the end of the sheath tube away from the operator, the end of the sheath tube close to the operator is provided with an airbag air inlet; the outer wall of the sheath tube is provided with a movable outer support foot. 2 . The abdominal cavity puncture sheath according to claim 1 , wherein: the end of the movable sleeve away from the operator is provided with a cutting knife; the end of the movable sleeve close to the operator is provided with a return spring. 3 . 3 . The abdominal cavity puncture sheath according to claim 2 , wherein an airway is provided in the side wall of the sheath tube, one end of the airway is communicated with the eccentric balloon, and the other end of the airway is connected to the air bag for air intake. 4 . mouth connection. 4 . The abdominal cavity puncture sheath according to claim 3 , wherein an eyepiece is provided on the outer side wall of the end of the sheath tube away from the operator. 5 . 5. The abdominal cavity puncture sheath according to claim 4, characterized in that: the outer side wall of the sheath tube on the side close to the operator is provided with an external thread; the outer support foot is provided with an annular fixing ring, The fixing ring is provided with an inner thread; the outer support foot is movably connected to the outer side wall of the sheath tube through the thread. 6 . The paracentesis sheath according to claim 5 , wherein the fixing ring of the outer support foot is provided with a support protrusion facing the patient for preventing the paracentesis sheath from entering the abdominal cavity, and the support protrusion is provided with a peritoneal puncture sheath. 7 . for elastic support. 7 . The abdominal cavity puncture sheath according to claim 6 , wherein the support protrusions are set as rectangular parallelepiped support feet parallel to the central axis of the sheath tube. 8 . 8 . The paracentesis sheath according to claim 6 , wherein the outer wall of the sheath between the support protrusion and the end of the sheath away from the operator is provided with a smooth and non-protruding outer surface. 9 . 9 . The abdominal cavity puncture sheath according to claim 8 , wherein the end of the sheath tube close to the operator is provided with a carbon dioxide gas inlet. 10 .

Images