CN210903272U

CN210903272U - Interventional puncture device

Info

Publication number: CN210903272U
Application number: CN201921465423.5U
Authority: CN
Inventors: 谭培兰
Original assignee: Sichuan Electric Power Hospital
Current assignee: Sichuan Electric Power Hospital
Priority date: 2019-09-04
Filing date: 2019-09-04
Publication date: 2020-07-03
Anticipated expiration: 2029-09-04

Abstract

The utility model discloses an intervene piercing depth relates to medical instrument technical field, and its technical scheme main points are: comprises a biopsy needle and a puncture component, wherein the puncture component comprises a needle cylinder, a sharp needle and a blunt needle; the distance from the puncture end of the sharp needle to the puncture end of the needle cylinder is 3-5 mm; the puncture end of the needle cylinder is flush with the puncture end of the blunt needle inserted in the needle cylinder; the end part of the needle cylinder is provided with a needle cylinder seat; the blunt needle is provided with a blunt needle seat; the sharp needle is provided with a sharp needle seat; the biopsy needle comprises a gun needle and a handle; the gun needle comprises a puncture needle tube and a puncture needle core; the puncture end of the puncture needle tube is provided with a sampling mechanism; an ejection device is arranged inside the handle; the end part of the puncture needle core is fixedly connected with the output end of the ejection device; the ejection device drives the puncture needle core to have a puncture distance of 2 cm. The puncture depth control device has the effects of avoiding bleeding caused by damage to vascular tissues of a patient in a puncture process, accurately controlling the depth of the puncture into target tissues to be 2cm, ensuring the quality of a puncture operation, reducing the risk of the puncture operation and being simple in puncture operation.

Description

Interventional puncture device

Technical Field

The utility model relates to the technical field of medical equipment, more specifically say, it relates to an intervene piercing depth.

Background

An interventional puncturing device is used for puncturing organs or tissues percutaneously under ultrasonic or CT images, and obtaining cytological or histological specimens in a cutting or suction manner for cell or pathological diagnosis. The main indication of percutaneous aspiration biopsy is the differential diagnosis of space-occupying lesions, mainly used for the differentiation of tumors and non-tumors, benign and malignant tumors, primary and metastatic tumors, and the definition of histological types of tumors so as to determine the treatment scheme. The percutaneous aspiration biopsy is a simple, safe and effective diagnostic means, and is applied to internal organs, bones, brains and other parts in vivo. Other chronic invasive and inflammatory lesions of solid organs such as lung, liver, kidney, etc. may also be biopsied and further pathotyped.

Currently, the prior art interventional puncture devices are primarily single use biopsy needles. The disposable biopsy needle in the prior art mainly comprises an outer needle and an inner core needle, wherein a sampling groove is arranged on the inner core needle, the outer needle is sleeved outside the inner core needle and is installed on a needle seat together, and a controllable ejection device is used for controlling to obtain a sample. When the puncture needle is used, when a sampling position is punctured through skin under the monitoring of CT images, the inner core needle is firstly punctured to enable the sampling groove to be positioned at the sampling position, then the ejection device ejects the outer tube needle, the outer tube needle rapidly rushes forward to cut the tissue of a lesion position in the sampling groove of the inner core needle, and the biopsy needle is pulled out to obtain a specimen.

In the prior art, when an interventional puncture device is used for puncture surgery and percutaneous puncture is carried out to a sampling part under the monitoring of CT images, an inner core needle is firstly punctured to a sampling groove to be positioned at the sampling part, then an ejection device is controlled to eject an outer tube needle, the outer tube needle rapidly rushes forward, tissues of a lesion part are cut in the sampling groove of the inner core needle, and a biopsy needle is pulled out to obtain a sample; the inner core needle is easy to damage vascular tissues to cause bleeding in the puncture process, and the depth of the inner core needle punctured into organ tissues is difficult to control, so that the quality of the puncture operation is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an intervene piercing depth device has and can avoid damaging patient's vascular tissue at the puncture in-process and arouse the hemorrhage, and can be with the degree of depth accurate control of stabbing into target tissue at 2cm to be convenient for guarantee the quality of puncture operation, reduce the risk of puncture operation, and make puncture easy operation's effect.

The above technical purpose of the present invention can be achieved by the following technical solutions: an interventional puncture device comprises a biopsy needle and a puncture assembly matched with the biopsy needle, wherein the puncture assembly comprises a hollow needle cylinder, a sharp needle movably inserted into the needle cylinder and a blunt needle movably inserted into the needle cylinder; the distance from the puncture end of the sharp needle to the puncture end of the needle cylinder is 3-5 mm; the puncture end of the needle cylinder is flush with the puncture end of the blunt needle inserted in the needle cylinder; the end part of the needle cylinder, which is far away from the puncture end of the needle cylinder, is fixedly connected with a needle cylinder seat; the bottom end of the blunt needle is fixedly connected with a blunt needle seat; the bottom end of the sharp needle is fixedly connected with a sharp needle seat; the biopsy needle comprises a gun needle which can be movably inserted into the needle cylinder and a handle connected with the end part of the gun needle; the gun needle comprises a puncture needle tube fixedly connected with the handle and a puncture needle core movably spliced with the puncture needle tube; the puncture end of the puncture needle tube is provided with a sampling mechanism; an ejection device for driving the puncture needle core to stretch in the puncture needle tube is arranged in the handle; the end part of the puncture needle core far away from the puncture end is fixedly connected with the output end of the ejection device; the ejection device drives the puncture needle core to have a puncture distance of 2 cm.

By adopting the technical scheme, in the process of carrying out interventional puncture sampling on the target tissue of a patient, firstly, preoperative sterilization operation is carried out, and then, the interventional puncture device is used for carrying out puncture operation under the guidance of color Doppler ultrasound or CT; firstly, inserting a sharp needle into a needle cylinder to perform puncture and skin breaking; when the puncture end of the sharp needle is punctured into the skin, the sharp needle is withdrawn from the needle cylinder, the blunt needle is inserted into the needle cylinder, and then the needle cylinder and the blunt needle inserted into the needle cylinder are punctured from the puncture position of the skin of the patient to the punctured target tissue under the guidance of color Doppler ultrasound or CT; when the puncture ends of the needle cylinder and the blunt needle are close to the punctured target tissue, the blunt needle inserted into the needle cylinder is taken out, then the sharp needle is inserted into the needle cylinder, and the puncturing operation is continued; when the puncture ends of the needle cylinder and the sharp needle are just punctured into target tissues, the sharp needle inserted into the needle cylinder is taken out, and the gun needle of the biopsy needle is inserted into the needle cylinder, so that the puncture end of the gun needle is flush with the puncture end of the needle cylinder; then, the ejection device connected with the gun needle is controlled to drive the puncture needle core connected with the ejection device to stretch in the puncture needle tube, so that the puncture end of the puncture needle core extends out of the puncture end of the puncture needle tube to puncture into the target tissue, and the depth of the puncture needle core puncturing into the target tissue is 2 cm; then, taking out the target tissue through a sampling mechanism at the puncture end of the puncture needle tube, thereby completing the sampling of the target tissue to be detected; the puncture path is convenient to fix through the needle cylinder; the blunt needle is convenient to ensure that the blood vessel tissue around the target tissue is not damaged to cause bleeding in the process of puncturing the needle cylinder and the blunt needle to the target tissue; the sharp needle is convenient for the skin breaking work of the epidermis of a patient and the puncture of the surface of the target tissue, thereby facilitating the subsequent puncture sampling operation; the puncture needle core is convenient for puncturing into target tissues to carry out biopsy sampling operation; the ejection device is convenient for driving the puncture needle core to stretch and retract in the puncture needle tube, so that the puncture end of the puncture needle core can be driven to extend out of the puncture end of the puncture needle tube and puncture into target tissues; the distance of the puncture needle core extending out of the puncture end of the puncture needle tube is driven to be 2cm by the ejection device, so that the puncture depth of the puncture needle core into the target tissue is conveniently controlled to be fixed to be 2cm, and the condition that the depth of the puncture needle core into the target tissue is too deep or too shallow in the puncture process of a doctor so as to influence the quality of a puncture operation is avoided; intervene the in-process of puncture to the patient, through the cylinder, blunt needle, sharp needle, the puncture needle pipe, the puncture needle core, the distance that ejection device and ejection device drive puncture needle core stretched out the puncture needle pipe puncture end is fixed 2cm, can avoid damaging patient's vascular tissue at the puncture in-process and cause the patient bloody while, can also fix the degree of depth that the target tissue was punctured into to the piercing depth be 2cm, thereby be convenient for guarantee the quality of puncture operation, reduce the risk of puncture sample, and make puncture easy operation.

The utility model discloses further set up to: the sampling mechanism comprises a rotary slice connected with the inner wall of the puncture needle tube and an extrusion slice connected with the outer wall of the puncture needle tube; the extrusion piece is connected with an arc-shaped fixing piece which is attached to the inner wall of the puncture needle tube.

By adopting the technical scheme, after the puncture needle core is punctured into the target tissue, the target tissue is conveniently cut and sampled into the puncture needle tube through the rotary slice on the inner wall of the puncture needle tube; then, in the process of withdrawing the gun needle, the extrusion sheet on the outer wall of the puncture needle tube is pressed by the puncture path, and the arc-shaped fixing sheet on the inner wall of the puncture needle tube stably fixes the target tissue which is cut and sampled in the puncture needle tube, so that the successful sampling of the target tissue of the patient is ensured.

The utility model discloses further set up to: the outer walls of the needle cylinder and the puncture needle tube are provided with scale marks; the scale lines comprise long lines and short lines positioned between the long lines; the distance between the long lines is 1 cm; the distance between the short line and the adjacent long line is 5 mm.

Through adopting above-mentioned technical scheme, use this piercing depth to carry out the operation process that punctures the sample to patient's target tissue, utilize the scale mark, can observe the degree of depth of puncture needle insertion.

The utility model discloses further set up to: the sharp needle seat and the blunt needle seat are cylindrical or prismatic; the outer walls of the sharp needle seat and the blunt needle seat are provided with anti-skid threads.

By adopting the technical scheme, the operation of taking out the sharp needle inserted in the needle cylinder is facilitated through the sharp needle seat in the process of performing the puncture operation; the blunt needle inserted in the needle cylinder is convenient to take out through the blunt needle seat; through the anti-skidding screw thread, be convenient for prevent that the doctor from slipping in the process of taking out sharp needle or blunt needle from the cylinder through the hand.

The utility model discloses further set up to: the syringe seat is a hollow cylinder or prism; the outer wall of the needle cylinder is provided with anti-skid stripes.

Through adopting above-mentioned technical scheme, intervene the in-process of puncture operation, through anti-skidding stripe, the doctor of being convenient for can stably hold the operation of cylinder to be convenient for stabilize the puncture route.

The utility model discloses further set up to: the handle is a prism or a cylinder; the outer wall of the handle is provided with anti-skid projections.

Through adopting above-mentioned technical scheme, through anti-skidding arch, be convenient for prevent that the doctor from skidding and influencing the puncture operation through holding the in-process of handle.

The utility model discloses further set up to: and a trigger button for controlling the ejection device to work is arranged on the outer wall of the handle.

By adopting the technical scheme, the ejection device can be conveniently controlled to work by triggering the button, so that the puncture needle core can be conveniently controlled to perform telescopic puncture operation in the puncture needle tube.

To sum up, the utility model discloses following beneficial effect has: the puncture path is convenient to fix through the needle cylinder; the blunt needle is convenient to ensure that the blood vessel tissue around the target tissue is not damaged to cause bleeding in the process of puncturing the needle cylinder and the blunt needle to the target tissue; the sharp needle is convenient for the skin breaking work of the epidermis of a patient and the puncture of the surface of the target tissue, thereby facilitating the subsequent puncture sampling operation; the puncture needle core is convenient for puncturing into target tissues to carry out biopsy sampling operation; the ejection device is convenient for driving the puncture needle core to stretch and retract in the puncture needle tube, so that the puncture end of the puncture needle core can be driven to extend out of the puncture end of the puncture needle tube and puncture into target tissues; the distance of the puncture needle core extending out of the puncture end of the puncture needle tube is driven to be 2cm by the ejection device, so that the puncture depth of the puncture needle core into the target tissue is conveniently controlled to be fixed to be 2cm, and the condition that the depth of the puncture needle core into the target tissue is too deep or too shallow in the puncture process of a doctor so as to influence the quality of a puncture operation is avoided; intervene the in-process of puncture to the patient, through the cylinder, blunt needle, sharp needle, the puncture needle pipe, the puncture needle core, the distance that ejection device and ejection device drive puncture needle core stretched out the puncture needle pipe puncture end is fixed 2cm, can avoid damaging patient's vascular tissue at the puncture in-process and cause the patient bloody while, can also fix the degree of depth that the target tissue was punctured into to the piercing depth be 2cm, thereby be convenient for guarantee the quality of puncture operation, reduce the risk of puncture sample, and make puncture easy operation.

Drawings

Fig. 1 is a schematic structural diagram in an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of the handle according to the embodiment of the present invention;

fig. 3 is a schematic view of the sharp needle and the connection structure between the sharp needle and the needle cylinder in the embodiment of the present invention;

fig. 4 is a schematic view of the blunt needle and the connection structure between the blunt needle and the needle cartridge according to the embodiment of the present invention.

In the figure: 1. a needle cylinder; 2. a blunt needle; 3. sharpening the needle; 4. a syringe base; 5. a blunt needle seat; 6. a sharp needle seat; 7. a gun needle; 8. a handle; 9. puncturing a needle tube; 10. a puncture needle core; 11. an ejection device; 12. rotationally slicing; 13. a long line; 14. anti-skid threads; 15. anti-skid stripes; 16. anti-skid projections; 17. a trigger button; 18. short lines; 19. extruding the sheet; 20. a circular arc-shaped fixing piece is provided.

Detailed Description

The present invention will be described in further detail with reference to the accompanying fig. 1-4.

Example (b): an interventional puncture device, as shown in fig. 1, 2, 3 and 4, comprises a biopsy needle and a puncture assembly matched with the biopsy needle, wherein the puncture assembly comprises a hollow needle cylinder 1, a sharp needle 3 movably inserted with the needle cylinder 1 and a blunt needle 2 movably inserted with the needle cylinder 1. The distance of the puncture end of the sharp needle 3 extending out of the puncture end of the needle cylinder 1 is 3-5 mm. The puncture end of the needle cylinder 1 is flush with the puncture end of the blunt needle 2 inserted in the needle cylinder 1. The end part of the needle cylinder 1 far away from the puncture end of the needle cylinder 1 is fixedly connected with a needle cylinder 1 seat. The bottom end of the blunt needle 2 is fixedly connected with a blunt needle 2 seat. The bottom end of the sharp needle 3 is fixedly connected with a sharp needle 3 seat. The biopsy needle comprises a gun needle 7 which can be movably inserted with the needle cylinder 1 and a handle 8 which is connected with the end part of the gun needle 7. The gun needle 7 comprises a puncture needle tube 9 fixedly connected with a handle 8 and a puncture needle core 10 movably inserted with the puncture needle tube 9. The puncture end of the puncture needle tube 9 is provided with a sampling mechanism. An ejection device 11 for driving the puncture needle core 10 to extend and retract in the puncture needle tube 9 is provided inside the handle 8. The end part of the puncture needle core 10 far away from the puncture end is fixedly connected with the output end of the ejection device 11. The ejection device 11 drives the puncture needle core 10 to puncture for 2 cm.

In this embodiment, according to the practical experience of the clinician in performing the interventional puncture operation for a long time, when the puncture operation is performed, the quality of the needle sampling biopsy can be ensured when the depth of the interventional puncture device puncturing the organ tissue is 2 cm. The needle cylinder 1, the blunt needle 2, the sharp needle 3, the puncture needle tube 9 and the puncture needle core 10 are all made of rigid materials with the hardness of 360-420 HV. The roughness of the outer walls of the needle cylinder 1, the blunt needle 2, the sharp needle 3, the puncture needle tube 9 and the puncture needle core 10 is 0.2-0.4 Ra. The needle cylinder 1 seat, the blunt needle 2 seat and the sharp needle 3 seat are made of transparent plastic materials, and the needle cylinder 1 seat and the needle cylinder 1, the blunt needle 2 seat and the blunt needle 2, and the sharp needle 3 seat and the sharp needle 3 are fixedly connected in a hot melting mode. In the process of interventional puncture sampling of target tissues of a patient, firstly, a preoperative sterilization operation is performed, and then a puncture operation is performed by using an interventional puncture device under the guidance of a CT. First, the sharp needle 3 is inserted into the needle cylinder 1 to perform the puncture and skin-breaking operation. When the puncture end of the sharp needle 3 is punctured into the skin, the sharp needle 3 is withdrawn from the needle cylinder 1, the blunt needle 2 is inserted into the needle cylinder 1, and then the needle cylinder 1 and the blunt needle 2 inserted into the needle cylinder 1 are punctured from the puncture position of the skin of the patient to the punctured target tissue under the guidance of CT. When the puncture ends of the needle cylinder 1 and the blunt needle 2 are close to the punctured target tissue, the blunt needle 2 inserted into the needle cylinder 1 is taken out, then the sharp needle 3 is inserted into the needle cylinder 1, and the puncturing operation is continued. When the puncture ends of the needle cylinder 1 and the sharp needle 3 just puncture target tissues, the sharp needle 3 inserted into the needle cylinder 1 is taken out, and the gun needle 7 of the biopsy needle is inserted into the needle cylinder 1, so that the puncture end of the gun needle 7 is flush with the puncture end of the needle cylinder 1. Then, the ejection device 11 connected with the gun needle 7 is controlled to drive the puncture needle core 10 connected with the ejection device 11 to extend and retract in the puncture needle tube 9, so that the puncture end of the puncture needle core 10 extends out of the puncture end of the puncture needle tube 9 and then punctures into the target tissue, and the depth of the puncture needle core 10 puncturing into the target tissue is 2 cm. Then, the target tissue is taken out by a sampling mechanism at the puncture end of the puncture needle tube 9, thereby completing the sampling and inspection of the target tissue. The needle cartridge 1 facilitates fixing the puncture path. The blunt needle 2 is convenient to ensure that the needle cylinder 1 and the blunt needle 2 do not damage the vascular tissue around the target tissue to cause bleeding during the process of penetrating the target tissue. The sharp needle 3 is convenient for the skin-breaking work of the epidermis of the patient and the puncture of the surface of the target tissue, thereby facilitating the subsequent puncture sampling operation. The puncture needle core 10 is convenient for puncturing target tissues to carry out biopsy sampling operation. The ejection device 11 facilitates driving the puncture needle core 10 to extend and retract in the puncture needle tube 9, so that the puncture end of the puncture needle core 10 can be driven to extend out of the puncture end of the puncture needle tube 9 and puncture into the target tissue. The distance of the puncture needle core 10 extending out of the puncture end of the puncture needle tube 9 is 2cm under the driving of the ejection device 11, so that the puncture depth of the puncture needle core 10 puncturing into the target tissue is conveniently controlled to be fixed to be 2cm, and the condition that the depth of the puncture needle core 10 puncturing into the target tissue is too deep or too shallow in the puncture process of a doctor is avoided, and the quality of a puncture operation is influenced. In the process of interventional puncture to the patient, through cylinder 1, blunt needle 2, sharp needle 3, puncture needle tube 9, puncture needle core 10, the distance that ejection device 11 and ejection device 11 drive puncture needle core 10 stretched out puncture needle tube 9 puncture end is fixed 2cm, can avoid damaging patient's vascular tissue at the puncture in-process and cause the patient bloody in, can also fix the degree of depth of target tissue with the puncture device as 2cm, thereby be convenient for guarantee the quality of puncture operation, reduce the risk of puncture sample, and make puncture easy operation.

The sampling mechanism comprises a rotary cutting blade 12 connected with the inner wall of the puncture needle tube 9 and a squeezing blade 19 connected with the outer wall of the puncture needle tube 9. The pressing piece 19 is connected with an arc-shaped fixing piece 20 which is attached to the inner wall of the puncture needle tube 9.

In this embodiment, the rotary-cut blades 12 are two thin and sharp metal blades symmetrically fixed on the inner wall near the puncturing end of the puncture needle tube 9, and the rotary-cut blades 12 are fixedly connected with the inner wall of the puncture needle tube 9. The extrusion pieces 19 are 2-5 pieces which are evenly distributed on the outer wall of the puncture needle tube 9 at intervals, and the extrusion pieces 19 are fixedly connected with the arc fixing pieces on the inner wall of the puncture needle tube 9 through the connecting pieces which penetrate through the outer wall of the puncture needle tube 9. After the puncture needle core 10 punctures into the target tissue, the target tissue is cut and sampled into the puncture needle tube 9 conveniently through the rotary slice 12 on the inner wall of the puncture needle tube 9. Then, in the process of withdrawing the gun needle 7, the extrusion piece 19 on the outer wall of the puncture needle tube 9 is pressed by the puncture path, and the arc-shaped fixing piece 20 on the inner wall of the puncture needle tube 9 stably fixes the target tissue which is cut and sampled in the puncture needle tube 9, thereby being convenient for ensuring the successful sampling of the target tissue of the patient.

Scale marks are etched on the outer walls of the needle cylinder 1 and the puncture needle tube 9. The graduation lines comprise a long line 13 and a short line 18 located between the long line 13 and the long line 13. The distance between the long lines 13 is 1 cm. The distance between the short line 18 and the adjacent long line 13 is 5 mm.

In the present embodiment, during the operation of sampling the target tissue of the patient by puncturing using the puncturing device, the depth of the puncturing needle can be easily observed by the scale formed by the long line 13 and the short line 18.

The sharp needle 3 seat and the blunt needle 2 seat are cylindrical or prismatic. The outer walls of the sharp needle 3 seat and the blunt needle 2 seat are processed with anti-skid threads 14.

In this embodiment, the sharp needle 3 seat and the blunt needle 2 seat are cylindrical, and the outer walls of the sharp needle 3 seat and the blunt needle 2 seat are symmetrically processed with grooves. During the puncture operation, the sharp needle 3 inserted in the needle cylinder 1 can be taken out conveniently through the sharp needle 3 seat. The blunt needle 2 seat is used for facilitating the operation of taking out the blunt needle 2 inserted in the needle cylinder 1. By means of the anti-slip thread 14, slipping during removal of the sharp needle 3 or the blunt needle 2 from the cylinder 1 by the hand of the surgeon is facilitated.

The syringe 1 seat is a hollow cylinder or prism. The outer wall of the needle cylinder 1 is provided with anti-skid stripes 15.

In this embodiment, the holder of the cylinder 1 is a hollow prism. The end part of the needle cylinder 1 far away from the puncture end of the needle cylinder 1 is fixedly connected with the inner wall of the needle cylinder 1 seat. In the process of performing the interventional puncture operation, the doctor can stably hold the operation of the needle cylinder 1 through the anti-slip stripes 15, so that the puncture path is stabilized.

The handle 8 is prism or cylinder. The outer wall of the handle 8 is provided with an anti-skid bulge 16.

In this embodiment, the handle 8 is a cylinder. The anti-slip projection 16 prevents the doctor from slipping during the process of holding the handle 8 by hand and affecting the puncturing operation.

The outer wall of the handle 8 is provided with a trigger button 17 for controlling the operation of the ejection device 11.

In this embodiment, the outer wall of the handle 8 is provided with a strip-shaped groove. The trigger button 17 is slidably connected to the strip-shaped groove. The end of the trigger button 17 located within the handle 8 is connected to the ejector 11. The trigger button 17 is used for controlling the operation of the ejection device 11, thereby facilitating the operation of the puncture needle core 10 for the telescopic puncture in the puncture needle tube 9.

The working principle is as follows: in the process of interventional puncture sampling of target tissues of a patient, firstly, a preoperative sterilization operation is performed, and then a puncture operation is performed by using an interventional puncture device under the guidance of a CT. First, the sharp needle 3 is inserted into the needle cylinder 1 to perform the puncture and skin-breaking operation. When the puncture end of the sharp needle 3 is punctured into the skin, the sharp needle 3 is withdrawn from the needle cylinder 1, the blunt needle 2 is inserted into the needle cylinder 1, and then the needle cylinder 1 and the blunt needle 2 inserted into the needle cylinder 1 are punctured from the puncture position of the skin of the patient to the punctured target tissue under the guidance of CT. When the puncture ends of the needle cylinder 1 and the blunt needle 2 are close to the punctured target tissue, the blunt needle 2 inserted into the needle cylinder 1 is taken out, then the sharp needle 3 is inserted into the needle cylinder 1, and the puncturing operation is continued. When the puncture ends of the needle cylinder 1 and the sharp needle 3 just puncture target tissues, the sharp needle 3 inserted into the needle cylinder 1 is taken out, and the gun needle 7 of the biopsy needle is inserted into the needle cylinder 1, so that the puncture end of the gun needle 7 is flush with the puncture end of the needle cylinder 1. Then, the ejection device 11 connected with the gun needle 7 is controlled to drive the puncture needle core 10 connected with the ejection device 11 to extend and retract in the puncture needle tube 9, so that the puncture end of the puncture needle core 10 extends out of the puncture end of the puncture needle tube 9 and then punctures into the target tissue, and the depth of the puncture needle core 10 puncturing into the target tissue is 2 cm. Then, the target tissue is taken out by a sampling mechanism at the puncture end of the puncture needle tube 9, thereby completing the sampling and inspection of the target tissue. The needle cartridge 1 facilitates fixing the puncture path. The blunt needle 2 is convenient to ensure that the needle cylinder 1 and the blunt needle 2 do not damage the vascular tissue around the target tissue to cause bleeding during the process of penetrating the target tissue. The sharp needle 3 is convenient for the skin-breaking work of the epidermis of the patient and the puncture of the surface of the target tissue, thereby facilitating the subsequent puncture sampling operation. The puncture needle core 10 is convenient for puncturing target tissues to carry out biopsy sampling operation. The ejection device 11 facilitates driving the puncture needle core 10 to extend and retract in the puncture needle tube 9, so that the puncture end of the puncture needle core 10 can be driven to extend out of the puncture end of the puncture needle tube 9 and puncture into the target tissue. The distance of the puncture needle core 10 extending out of the puncture end of the puncture needle tube 9 is 2cm by driving the ejection device 11, so that the puncture depth of the puncture needle core 10 puncturing into the target tissue is conveniently controlled to be fixed to be 2cm, and the condition that the depth of the puncture needle core 10 puncturing into the target tissue is too deep or too shallow in the puncture process of a doctor can be avoided, so that the quality of a puncture operation is influenced. In the process of interventional puncture to the patient, through cylinder 1, blunt needle 2, sharp needle 3, puncture needle tube 9, puncture needle core 10, the distance that ejection device 11 and ejection device 11 drive puncture needle core 10 stretched out puncture needle tube 9 puncture end is fixed 2cm, can avoid damaging patient's vascular tissue at the puncture in-process and cause the patient bloody in, can also fix the degree of depth of target tissue with the puncture device as 2cm, thereby be convenient for guarantee the quality of puncture operation, reduce the risk of puncture sample, and make puncture easy operation.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides an intervene piercing depth, includes biopsy needle and the supporting puncture subassembly of biopsy needle, characterized by: the puncture component comprises a hollow needle cylinder (1), a sharp needle (3) which can be movably inserted into the needle cylinder (1) and a blunt needle (2) which can be movably inserted into the needle cylinder (1); the distance from the puncture end of the sharp needle (3) to the puncture end of the needle cylinder (1) is 3-5 mm; the puncture end of the needle cylinder (1) is flush with the puncture end of the blunt needle (2) inserted in the needle cylinder (1); the end part of the needle cylinder (1) far away from the puncture end of the needle cylinder (1) is fixedly connected with a needle cylinder (1) seat; the bottom end of the blunt needle (2) is fixedly connected with a blunt needle (2) seat; the bottom end of the sharp needle (3) is fixedly connected with a sharp needle (3) seat; the biopsy needle comprises a gun needle (7) which can be movably inserted into the needle cylinder (1) and a handle (8) connected with the end part of the gun needle (7); the gun needle (7) comprises a puncture needle tube (9) fixedly connected with the handle (8) and a puncture needle core (10) movably inserted with the puncture needle tube (9); the puncture end of the puncture needle tube is provided with a sampling mechanism; an ejection device (11) for driving the puncture needle core (10) to stretch in the puncture needle tube (9) is arranged in the handle (8); the end part of the puncture needle core (10) far away from the puncture end is fixedly connected with the output end of the ejection device (11); the ejection device (11) drives the puncture needle core (10) to have a puncture distance of 2 cm.

2. An interventional puncture device according to claim 1, wherein: the sampling mechanism comprises a rotary slice (12) connected with the inner wall of the puncture needle tube (9) and an extrusion slice (19) connected with the outer wall of the puncture needle tube (9); the extrusion piece (19) is connected with an arc-shaped fixing piece (20) which is attached to the inner wall of the puncture needle tube (9).

3. An interventional puncture device according to claim 1, wherein: scale marks are arranged on the outer walls of the needle cylinder (1) and the puncture needle tube (9); the scale lines comprise long lines (13) and short lines (18) positioned between the long lines (13) and the long lines (13); the distance between the long lines (13) is 1 cm; the short lines (18) with the distance of 5mm are arranged between the short lines (18) and the adjacent long lines (13); the distance between the long lines (13) is 1 cm; the distance between the short line (18) and the adjacent long line (13) is 5 mm.

4. An interventional puncture device according to claim 1, wherein: the sharp needle (3) seat and the blunt needle (2) seat are cylindrical or prismatic; the outer walls of the sharp needle (3) seat and the blunt needle (2) seat are provided with anti-skid threads (14).

5. An interventional puncture device according to claim 1, wherein: the needle cylinder (1) seat is a hollow cylinder or prism; the outer wall of the needle cylinder (1) is provided with anti-skid stripes (15).

6. An interventional puncture device according to claim 1, wherein: the handle (8) is a prism or a cylinder; the outer wall of the handle (8) is provided with an anti-skid bulge (16).

7. An interventional puncture device according to claim 1, wherein: and a trigger button (17) for controlling the ejection device (11) to work is arranged on the outer wall of the handle (8).