CN109805968B - Device for establishing a closed negative pressure tunnel in the lungs guided by CT - Google Patents

Abstract

The invention relates to a device for establishing a CT-guided ultra-low temperature frozen intrapulmonary closed negative pressure tunnel, which comprises: no more than two negative pressure balls, wherein the front ends of the negative pressure balls are communicated with a connecting pipe; a three-way valve communicated with the connecting pipe; a pipeline communicated with one end of the three-way valve; a sheath connected to the conduit; a sheath connected to the conduit; one end of the pin tube is provided with a one-way valve, and the other end of the pin tube is provided with an opening; the device for establishing the CT-guided ultralow-temperature freezing pulmonary airtight negative pressure tunnel utilizes the freezing principle of the argon helium knife and a negative pressure ball, the sheath tube, a three-way valve and a connecting pipe to form an airtight negative pressure tunnel, so that respiratory interference is reduced, puncture success rate is improved, and meanwhile, due to the fact that the adopted sheath tube is used for puncture, the formed tunnel is thicker, and biopsy is facilitated.

Description

Device for establishing a closed negative pressure tunnel in the lungs guided by CT

Technical Field

The present invention relates to the field of medical devices, and in particular to a device for establishing a closed negative pressure tunnel in a CT-guided ultra-low temperature frozen lung.

Background technique

Lung biopsy is a percutaneous lung biopsy, which is used for the diagnosis and differential diagnosis of peripheral lung lesions or diffuse lung lesions. Current lung biopsy techniques include CT-guided lung puncture biopsy and thoracoscopic lung biopsy. However, after long-term temporary experiments, it was found that CT-guided lung puncture biopsy has the following disadvantages: ① It is easy to have tumor implantation and air embolism risk; ② The success rate of puncture is only 63% internationally, the success rate is low, and pneumothorax is easy to cause biopsy failure; ③ The tumor is still there after the biopsy and still needs to be treated.

Thoracoscopic lung biopsy has the following disadvantages: ① It cannot be performed on patients whose cardiopulmonary function is not suitable for surgery. ② For lung nodules located in the center of the lung, only lobectomy or segmentectomy can be performed to identify them. If they are not tumors, there is a risk of medical disputes. ③ For tissues that have been operated on before, reoperation is generally not performed. A key point in lung biopsy is how to establish a safe negative pressure tunnel to ensure a low risk of pneumothorax and hemothorax, while not easily causing tumor spread or air embolism (fatal risk) during biopsy, thereby facilitating the biopsy operation.

Summary of the invention

The purpose of the present invention is to overcome the shortcomings of the prior art and to provide a device for establishing a CT-guided ultra-low temperature frozen closed negative pressure tunnel in the lung by establishing a biopsy channel through the principle of argon-helium cryotherapy, so as to reduce respiratory interference and improve the success rate of puncture. At the same time, the biopsy channel established by the sheath is thicker, which is convenient for puncture.

To achieve the above object, the technical solution adopted by the present invention is: a device for establishing a closed negative pressure tunnel in the lung guided by CT for ultra-low temperature freezing, comprising:

No more than two negative pressure balls, each having a connecting tube connected to its front end;

A three-way valve connected to the connecting pipe;

A pipe connected to one end of the three-way valve;

A sheath tube connected to the pipeline; one end of the pin tube is provided with a one-way valve and the other end is provided with an opening;

An argon-helium knife is arranged at the front end of the opening of the sheath tube, and the argon-helium knife can move back and forth inside the sheath tube .

Preferably, the three-way valve is also provided with a control switch for controlling the connection/blocking between the negative pressure ball and the sheath.

Preferably, the pin tube includes a tube body, one end of which is sealed, and the tube body is made of three layers of material, the outer layer of the tube body is a nylon elastomer PEBA material layer, the middle layer of the tube body is a plastic layer, and the inner layer of the tube body is a polytetrafluoroethylene layer.

Preferably, the argon-helium knife is located 1.5 cm-2.5 cm from the front end of the sheath tube.

Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art:

The device for establishing a CT-guided ultra-low temperature frozen closed negative pressure tunnel in the lungs of the present invention utilizes the freezing principle of the argon-helium knife and a negative pressure ball, a sheath, a three-way valve and a connecting pipe to form a closed negative pressure tunnel, thereby reducing respiratory interference and improving the success rate of puncture. At the same time, since a sheath is used for puncture, the negative pressure tunnel formed in this way is thicker, thereby facilitating biopsy.

BRIEF DESCRIPTION OF THE DRAWINGS

The technical solution of the present invention is further described below in conjunction with the accompanying drawings:

Figure 1 is a schematic diagram of the structure of the present invention;

Among them: 1. Negative pressure ball; 2. Connecting tube; 3. Three-way valve; 4. Pipeline; 5. Sheath tube; 6. Argon-helium knife; 7. One-way valve.

Detailed ways

The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

Referring to Figure 1, the device for establishing a closed negative pressure tunnel in the lung guided by CT ultra-low temperature freezing of the present invention includes: no more than two negative pressure balls 1, with a connecting pipe 2 connected to the front end of the negative pressure ball 1; a three-way valve 3 connected to the connecting pipe 2; a pipeline 4 connected to one end of the three-way valve 3; a sheath tube 5 connected to the pipeline 4; a one -way valve 7 is provided at one end of the pin tube 5 , and an opening is provided at the other end; an argon-helium knife 6 is provided at the front end of the opening of the sheath tube 5, and the argon-helium knife 6 can move back and forth inside the sheath tube 5; in actual operation, the argon-helium knife 6 enters from the tail of the sheath tube 5, that is, the one-way valve, and finally comes out from the opening of the sheath tube 5 .

As a further preferred embodiment, the three-way valve 3 is further provided with a control switch for controlling the connection/blocking between the negative pressure ball and the sheath.

As a further preferred embodiment, the sheath tube 5 includes a tube body, one end of which is sealed, and the tube body is made of three layers of material, the outer layer of the tube body is a nylon elastomer PEBA material layer, the middle layer of the tube body is a plastic layer, and the inner layer of the tube body is a polytetrafluoroethylene layer.

As a further preferred embodiment, the argon-helium knife 6 is located 1.5 cm-2.5 cm from the front end of the sheath tube 5 .

Embodiment 1:

The device for establishing a closed negative pressure tunnel in the lungs under CT guidance and ultra-low temperature freezing comprises a negative pressure ball 1, a connecting tube 2 is connected to the front end of the negative pressure ball 1; a three-way valve 3 connected to the connecting tube 2; a pipeline 4 connected to one end of the three-way valve 3; a sheath tube 5 connected to the pipeline 4; a one-way valve 7 is provided at one end of the pin tube 5, and an opening is provided at the other end; an argon-helium knife 6 is provided at the front end of the opening of the sheath tube 5, and the argon-helium knife 6 can move back and forth inside the sheath tube 5.

The CT-guided argon-helium knife tunnel lung biopsy uses local anesthesia. When starting the lung biopsy, a closed negative pressure tunnel needs to be established. First, the argon-helium knife is inserted from the one-way valve to the front end of the sheath opening, and then the sheath and the argon-helium knife are used to puncture the lungs. The lungs are frozen by the argon-helium knife to prevent the lungs from shaking during the biopsy. In this way, the freezing principle of the argon-helium knife is used to establish a closed negative pressure tunnel, which reduces respiratory interference and improves the success rate of puncture. At the same time, because the sheath 5 is used for puncture, the tunnel formed in this way is thicker, which is convenient for biopsy, while the existing ones are all performed by thin tubes. The argon-helium knife is then withdrawn from the sheath, and a 12-14G biopsy gun is used to enter the sheath to perform a biopsy on the human body. This ensures that there is sufficient lung tissue, which is beneficial for frozen sections or genetic testing. In addition, the tunnel is a negative pressure system that is closed to the outside world. This reduces the risk of pneumothorax and hemothorax during biopsy, and is also less likely to cause tumor spread or air embolism (fatal risk) during biopsy. The negative pressure ball can also be used to discharge some residual liquid in the biopsy, which facilitates the operation during the biopsy, because the liquid cannot flow out of the one-way valve but can only flow into the negative pressure ball.

After the biopsy is completed, the biopsy gun is withdrawn and the argon-helium knife is inserted again to freeze and inactivate the biopsied tissue. The argon-helium knife is then withdrawn from the body together with the present invention. This can prevent the risk of tumor implantation and metastasis after biopsy, and also inactivate the biopsied tissue, so that even if it is not a tumor, a certain treatment purpose can be achieved.

The device of the present invention is used for establishing a closed negative pressure tunnel in the lung under CT guidance and ultra-low temperature freezing. It utilizes the freezing principle of the argon-helium knife and a negative pressure ball, a sheath tube, a three-way valve and a connecting tube to form a closed negative pressure tunnel, so as to reduce respiratory interference and improve the success rate of puncture. At the same time, since the sheath tube is used for puncture, the tunnel formed in this way is thicker, which is convenient for biopsy.

The above are only specific application examples of the present invention and do not constitute any limitation on the protection scope of the present invention. Any technical solution formed by equivalent transformation or equivalent replacement shall fall within the protection scope of the present invention.

Claims (3)

1. A device for establishing a closed negative pressure tunnel in CT-guided ultra-low temperature frozen lungs, comprising:

No more than two negative pressure balls, wherein the front ends of the negative pressure balls are communicated with a connecting pipe;

a three-way valve communicated with the connecting pipe;

A pipeline communicated with one end of the three-way valve;

a sheath connected to the conduit; one end of the sheath tube is provided with a one-way valve, and the other end of the sheath tube is provided with an opening;

an argon helium knife is arranged at the front end of the opening of the sheath tube, and the argon helium knife can move back and forth in the sheath tube;

the freezing principle of the argon helium knife, the negative pressure ball, the sheath tube, the three-way valve and the connecting tube are utilized to form a closed negative pressure tunnel, the sheath tube is sleeved outside the argon helium knife, the built tissue freezing tunnel is still a negative pressure tunnel after the argon helium knife is pulled out, and some residual liquid in the biopsy is discharged by utilizing the negative pressure ball;

The sheath tube comprises a tube body, one end of the tube body is sealed, the tube body is made of three layers of materials, the outer layer of the tube body is a nylon elastomer PEBA material layer, the middle layer of the tube body is a plastic layer, and the inner layer of the tube body is a polytetrafluoroethylene layer.

2. The apparatus for establishing a CT-guided ultra-low temperature cryo-intrapulmonary closed negative pressure tunnel according to claim 1, wherein: the three-way valve is also provided with a control switch for controlling the communication/non-communication between the negative pressure ball and the sheath.

3. The apparatus for establishing a CT-guided ultra-low temperature cryo-intrapulmonary closed negative pressure tunnel according to claim 1, wherein: the argon helium knife is positioned at the front end of the sheath tube at a position of 1.5cm-2.5 cm.