Piercing apparatus

Abstract

This utility model discloses a puncture instrument, including a scope and a puncture needle. An electronic camera is sealed at the front end of the scope, and a handle is connected to the rear end of the scope. The handle has a handle connector at its front end. The puncture needle has a puncture needle channel for insertion into the scope, and a puncture needle connector at its rear end that can be screwed onto the handle connector. The front end of the puncture needle has a pointed end for the electronic camera to extend from. When used in combination with the scope, the electronic camera can capture images of the blood vessel distribution at the puncture site, allowing for flexible adjustment of the puncture position to avoid blood vessels and ensure safe puncture. Simultaneously, the puncture needle connector is a cap-type telescopic structure. Rotating the connector allows the puncture needle to move back and forth relative to the scope, enabling telescopic adjustment. Especially after the puncture needle is in place, it allows for retraction of the puncture needle relative to the scope, while the scope remains in its original position, thus preventing the risk of secondary injury due to improper operation and continued insertion of the puncture needle.

Description

Technical Field

[0001] This utility model belongs to the field of medical device technology, specifically relating to a puncture device. Background Technology

[0002] In recent years, with the development of medical technology and science, a brand-new treatment method has emerged in the medical field—minimally invasive treatment, a completely new treatment concept. Medical percutaneous nephrolithotomy (PCNL) devices are mainly used in surgical procedures and routine medical examinations. Compared with traditional surgery, the functional minimally invasive surgical technique of medical PCNL devices has been widely accepted by doctors and patients.

[0003] However, traditional puncture procedures rely heavily on physician experience and imaging guidance. While the puncture needle can be inserted accurately to the target site under ultrasound or X-ray guidance, this method can only locate the target path and cannot accurately avoid blood vessels, resulting in a degree of blindness. This can lead to damage to blood vessels, especially larger branches, during the puncture process, causing bleeding. Furthermore, after the puncture needle has been inserted and subsequent procedures are performed (such as guidewire insertion), there is a risk of secondary injury due to improper manipulation and further insertion of the needle. Utility Model Content

[0004] The purpose of this invention is to provide a puncture instrument that can achieve safe puncture under visual operation and prevent the risk of secondary injury caused by improper operation after the puncture needle has been inserted into place.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A puncture instrument comprising:

[0007] A microscope tube, wherein an electronic camera is sealed and installed at the front end of the microscope tube, and a handle is connected to the rear end of the microscope tube, and a handle connector is provided at the front end of the handle;

[0008] The puncture needle has a puncture needle channel inside for insertion into the endoscope tube, a puncture needle connector at the rear end for screwing and engaging with the handle connector, and a pointed end for the electronic camera to extend from the front end. The puncture needle connector is a screw-cap telescopic structure, and rotating the puncture needle connector can move the puncture needle back and forth relative to the endoscope tube.

[0009] As a preferred embodiment of this utility model, the handle connector is provided with a radially protruding pin on its exterior, and the front end of the handle connector extends axially with a positioning post, the outer periphery of which is provided with a positioning plane.

[0010] As a preferred embodiment of this utility model, the puncture needle connector includes a connecting cap, a connecting post, a movable cap, and a telescopic sleeve; the connecting cap is rotatably fitted onto the outer periphery of the connecting post, and the peripheral wall of the connecting cap is provided with a screw-in groove for engaging with the pin; the connecting post has a hollow structure, extending axially from the front end of the connecting cap, and a radially protruding limiting pin is provided on the outside of the extended portion of the connecting post; the interior of the connecting post is provided with a mating cavity matching the shape of the positioning post; the telescopic sleeve is slidably fitted onto the extended portion of the connecting post along the axial direction. Externally, the telescopic sleeve is provided with an axially extending guide groove that slides with the limiting pin; the front end of the telescopic sleeve has a connecting post portion that is fixedly connected to the puncture needle; the movable cap is rotatably sleeved on the outer periphery of the telescopic sleeve, and the peripheral wall of the movable cap is provided with a guide oblique hole that slides with the limiting pin. The guide oblique hole and the axial guide groove are arranged alternately, and both ends of the guide oblique hole are provided with buckle holes that can engage with the limiting pin; the movable cap is provided with end blocks at the front and rear end faces of the telescopic sleeve for pushing the telescopic sleeve to move back and forth.

[0011] As a preferred embodiment of this utility model, the front end of the peripheral wall of the connecting column is provided with an axial insertion hole; the interior of the telescopic sleeve is provided with a hollow insertion tube that extends axially and is inserted into the axial insertion hole; a sealing ring is provided between the hollow insertion tube and the axial insertion hole.

[0012] As a preferred embodiment of this utility model, the puncture needle axially penetrates the connecting post and communicates with the hollow cannula, and the inner hole of the hollow cannula is provided with a funnel-shaped inlet at one end near the connecting post.

[0013] As a preferred embodiment of this utility model, the connecting column is provided with axial limiting structures at the front and rear end faces of the connecting cap to prevent the connecting cap from moving back and forth.

[0014] As a preferred embodiment of this utility model, the outer periphery of the puncture needle is provided with an ultrasonic reflective frosted surface and X-ray imaging ink scale lines. The ultrasonic reflective frosted surface is located at the front end of the puncture needle and has a length of 0.5 cm. The X-ray imaging ink scale lines are provided in multiples and are arranged at equal intervals along the length direction of the puncture needle, with a distance of 1 cm between two adjacent X-ray imaging ink scale lines.

[0015] As a preferred embodiment of this utility model, the handle connector has a lens tube channel inside that connects to the lens tube; the handle also has a cable connection port for transmitting visual signals; the transmission line of the electronic camera is connected to the cable connection port through the lens tube.

[0016] As a preferred embodiment of this utility model, an illumination optical fiber is sealed and installed at the front end of the lens tube. The illumination optical fiber passes through the lens tube and extends into the handle. An LED light source is provided inside the handle. The light emitted by the LED light source is conducted through the illumination optical fiber and emitted at the front end of the lens tube.

[0017] As a preferred embodiment of this utility model, the puncture instrument further includes an observation screen, which is connected to the cable connector via a cable.

[0018] The advantages of implementing the puncture instrument provided by this utility model compared with the prior art are as follows:

[0019] When used in combination with the endoscope, the puncture needle can be photographed by an electronic camera during percutaneous nephrolithotomy to visualize the distribution of blood vessels at the puncture site. This allows for flexible adjustment of the puncture position, avoiding blood vessels and ensuring a safe puncture procedure. Simultaneously, the puncture needle connector is designed with a rotating cap-type telescopic structure. Rotating the connector moves the puncture needle relative to the endoscope, allowing for adjustment of the needle's extension and retraction. Especially after the needle is inserted, it can be withdrawn relative to the endoscope while the endoscope remains in place, preventing the risk of secondary injury from improper insertion. Attached Figure Description

[0020] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings of the embodiments will be briefly described below.

[0021] Figure 1 This is a schematic diagram of the structure of a puncture instrument provided in an embodiment of the present invention;

[0022] Figure 2 This is an axial fracture diagram of a puncture instrument provided in an embodiment of this utility model;

[0023] Figure 3 It is at Figure 2 A magnified view of region A in the structure shown;

[0024] Figure 4 This is an exploded view of the puncture needle connector;

[0025] Figure 5 It is at Figure 2 A magnified view of region B in the structure shown.

[0026] Marked in the image:

[0027] Lens tube 1; electronic camera 11; handle 12; handle connector 121; lens tube channel 122; cable connector 123; pin 124; positioning post 125; positioning plane 126; illumination fiber optic cable 127; LED light source 128;

[0028] 2. Puncture needle; 21. Puncture needle channel; 22. Puncture needle connector; 23. Tip end; 221. Connecting cap; 222. Connecting post; 223. Moving cap; 224. Telescopic sleeve; 225. Engagement groove; 226. Limiting pin; 227. Axial limiting structure; 228. Mating cavity; 229. Axial insertion hole; 2210. Axial guide groove; 2211. Hollow insertion tube; 2212. Sealing ring; 2213. Connecting post; 2214. Trumpet-shaped inlet; 2215. Guide oblique hole; 2216. Buckle hole; 2217. End stop. Detailed Implementation

[0029] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0030] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0031] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0032] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0033] Please refer to the following: Figures 1 to 5 The puncture instrument provided in the embodiments of this utility model will now be described.

[0034] like Figures 1 to 5As shown, the puncture instrument of this utility model embodiment includes a scope tube 1 and a puncture needle 2; an electronic camera 11 is sealed and installed at the front end of the scope tube 1, and a handle 12 is connected to the rear end of the scope tube 1, with a handle connector 121 at the front end of the handle 12; the puncture needle 2 has a puncture needle channel 21 for insertion into the scope tube 1, and a puncture needle connector 22 at the rear end of the puncture needle 2 that can be screwed and fastened to the handle connector 121; the front end of the puncture needle 2 has a pointed port 23 for the electronic camera 11 to extend out; the puncture needle connector 22 is a cap-type telescopic structure, and rotating the puncture needle connector 22 can drive the puncture needle 2 to move back and forth relative to the scope tube 1.

[0035] Therefore, when the puncture needle 2 and the endoscope tube 1 are used together, the electronic camera 11 can capture the distribution of blood vessels at the puncture site during the percutaneous nephrolithotomy, thereby flexibly adjusting the puncture position, avoiding blood vessels, and achieving a safe puncture operation. At the same time, the puncture needle connector 22 is designed as a rotating cap telescopic structure. Rotating the puncture needle connector 22 can drive the puncture needle 2 to move back and forth relative to the endoscope tube 1, thereby realizing the telescopic adjustment of the puncture needle. In particular, after the puncture needle is in place, it can retract relative to the endoscope tube, while the endoscope tube remains in its original position, thereby preventing the risk of secondary damage caused by the puncture needle continuing to be inserted due to improper operation.

[0036] For example, the handle connector 121 has a radially protruding pin 124 on its exterior, and a positioning post 125 extending axially from the front end of the handle connector 121. The positioning post 125 has a positioning plane 126 on its outer periphery. The puncture needle connector 22 includes a connecting cap 221, a connecting post 222, a movable cap 223, and a telescopic sleeve 224. The connecting cap 221 is rotatably fitted onto the outer periphery of the connecting post 222, and the peripheral wall of the connecting cap 221 has a screw-engaging groove 225 for engaging with the pin 124. The connecting post 222 has a hollow structure. A limiting pin 226 is provided radially protruding outside the protruding part of the connecting post 222, extending axially from the front end of the connecting cap 221; the connecting post 222 is provided with axial limiting structures 227 at the front and rear end faces of the connecting cap 221 to prevent the connecting cap 221 from moving back and forth; the interior of the connecting post 222 is provided with a mating cavity 228 that matches the shape of the positioning post 125; the front end of the peripheral wall of the connecting post 222 is provided with an axial insertion hole 229; the telescopic sleeve 224 can be slidably sleeved on the outside of the protruding part of the connecting post 222 along the axial direction. The telescopic sleeve 224 is provided with an axially extending guide groove 2210 that slides with the limiting pin 226; the telescopic sleeve 224 has an axially extending hollow insertion tube 2211 that fits into the axial insertion hole 229; a sealing ring 2212 is provided between the hollow insertion tube 2211 and the axial insertion hole 229; the front end of the telescopic sleeve 224 has a connecting post 2213 that is fixedly connected to the puncture needle 2 along the axial direction, the puncture needle 2 axially passes through the connecting post 2213 and communicates with the hollow insertion tube 2211, and the inner hole of the hollow insertion tube 2211 is close to the connecting post 2213. One end of the column 2213 is provided with a trumpet-shaped inlet 2214; the movable cap 223 is rotatably sleeved on the outer periphery of the telescopic sleeve 224, and the peripheral wall of the movable cap 223 is provided with a guide oblique hole 2215 that slides with the limiting pin 226. The guide oblique hole 2215 and the axial guide groove 2210 are arranged alternately. Both ends of the guide oblique hole 2215 are provided with buckle holes 2216 that can engage with the limiting pin 226; the movable cap 223 is provided with end blocks 2217 at the front and rear end faces of the telescopic sleeve 224 for pushing the telescopic sleeve 224 to move back and forth.

[0037] It is understood that, through the mechanical structure design of the handle connector 121 and the puncture needle connector 22 described above, this embodiment achieves efficient connection, precise positioning, adjustable puncture depth, and reliable sealing of the puncture instrument. The specific technical effects are as follows:

[0038] (1) The spiral fastening structure (such as bayonet design) of the pin 124 and the screw groove 225 can realize the quick screwing and locking of the handle 12 and the puncture needle connector 22. At the same time, the axial limiting structure 227 prevents the connecting cap 221 from moving back and forth relative to the connecting post 222, ensuring connection stability.

[0039] (2) When rotating the movable cap 223, the telescopic sleeve 224 will not rotate circumferentially under the cooperation of the limiting pin 226 and the axial guide groove 2210. The limiting pin 226 slides along the guide inclined hole 2215, pushing the telescopic sleeve 224 to move axially, thereby realizing the telescopic adjustment of the puncture needle 2. In particular, after the puncture needle 2 is inserted into place, the puncture needle 2 can be withdrawn relative to the endoscope tube 1 by rotating the movable cap 223, while the endoscope tube 1 remains in its original position, thereby preventing the risk of secondary damage caused by the puncture needle 2 continuing to be inserted due to improper operation. The design of the buckle hole 2216 can lock the limiting pin 226 in a preset position to ensure that the puncture depth is fixed and avoid accidental displacement during the operation.

[0040] (3) The matching design of the positioning post 125 with positioning plane 126 and mating cavity 228 (such as D-shaped post and hole) of the connecting cap can realize the anti-misalignment guidance when the puncture needle connector 22 and the handle connector 121 are connected. At the same time, it further strengthens the circumferential positioning during connection, and avoids the connecting post 222, telescopic sleeve 224 and puncture needle 2 rotating together due to torsion during the operation of connecting cap 221 and moving cap 223. This cuts off the transmission path of rotational torque to endoscope tube 1, ensuring that endoscope tube 1 and puncture needle 2 always maintain the preset spatial relationship and avoid the risk of endoscope tube 1 bending and being damaged. At the same time, the operation of moving cap 223 will not drive the entire puncture needle connector 22 structure to rotate, ensuring the stability of the extension and retraction adjustment of puncture needle 2.

[0041] (4) The design of the trumpet-shaped inlet 2214 can guide the endoscope tube 1 to be smoothly inserted into the puncture needle channel 21, reduce the collision between the endoscope tube 1 and the puncture needle 2 during insertion and assembly, and protect the electronic camera 11.

[0042] (5) The sealing ring 2212 between the hollow cannula 2211 and the axial insertion hole 229 is designed to maintain a seal when the telescopic sleeve 224 moves, preventing leakage of body fluids or medicines and reducing the risk of infection.

[0043] For example, in order to ensure that the puncture needle 2 can be used for puncture under ultrasound or X-ray guidance, the outer periphery of the puncture needle 2 is provided with an ultrasonic reflective frosted surface and X-ray imaging ink scale lines. The ultrasonic reflective frosted surface is located at the front end of the puncture needle 2 and the length of the ultrasonic reflective frosted surface is 0.5 cm. The X-ray imaging ink scale lines are provided in multiples and are arranged at equal intervals along the length direction of the puncture needle 2, and the distance between two adjacent X-ray imaging ink scale lines is 1 cm.

[0044] For example, the handle connector 121 has a lens tube channel 122 inside that is connected to the lens tube 1; the handle 12 is also provided with a cable connection port 123 for transmitting visual signals; the transmission line of the electronic camera 11 is connected to the cable connection port 123 through the lens tube 1 to realize the output of camera data and power input.

[0045] For example, an illumination fiber 127 is sealed and installed at the front end of the lens tube 1. The illumination fiber 127 passes through the lens tube 1 and extends into the handle 12. An LED light source 128 is provided in the handle 12. The light emitted by the LED light source 128 is conducted through the illumination fiber and emitted at the front end of the lens tube 1 to enhance the clarity of the electronic camera 11.

[0046] For example, the puncture instrument also includes an observation screen, which is connected to the cable connector 123 via a cable and is used to display the content captured by the electronic camera 11, so as to facilitate observation by medical staff and realize visual operation.

[0047] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. A puncture instrument, characterized in that, include: A microscope tube, wherein an electronic camera is sealed and installed at the front end of the microscope tube, and a handle is connected to the rear end of the microscope tube, and a handle connector is provided at the front end of the handle; The puncture needle has a puncture needle channel inside for insertion into the endoscope tube, a puncture needle connector at the rear end for screwing and engaging with the handle connector, and a pointed end for the electronic camera to extend from the front end. The puncture needle connector is a screw-cap telescopic structure, and rotating the puncture needle connector can move the puncture needle back and forth relative to the endoscope tube.

2. The puncture instrument according to claim 1, characterized in that, The handle connector has a radially protruding pin on its exterior, and a positioning post extending axially from the front end of the handle connector. The positioning post has a positioning plane on its outer periphery.

3. The puncture instrument according to claim 2, characterized in that, The puncture needle connector includes a connecting cap, a connecting post, a movable cap, and a telescopic sleeve; The connecting cap is rotatably fitted onto the outer periphery of the connecting post, and the peripheral wall of the connecting cap is provided with a screw-in groove for engaging with the pin. The connecting post has a hollow structure, extends axially from the front end of the connecting cap, and has a radially protruding limiting pin on the outside of the extended part of the connecting post; the inside of the connecting post has a mating cavity that matches the shape of the positioning post. The telescopic sleeve can be slidably fitted onto the outside of the protruding part of the connecting post along the axial direction. The telescopic sleeve is provided with an axially extending guide groove that slides with the limiting pin. The front end of the telescopic sleeve has a connecting post portion that is fixedly connected to the puncture needle along the axial direction. The movable cap is rotatably fitted onto the outer periphery of the telescopic sleeve. The peripheral wall of the movable cap is provided with a guide oblique hole that slides with the limiting pin. The guide oblique hole and the axial guide groove are arranged alternately. Both ends of the guide oblique hole are provided with buckle holes that can engage with the limiting pin. The movable cap is provided with end blocks at the front and rear end faces of the telescopic sleeve for pushing the telescopic sleeve to move back and forth.

4. The puncture instrument according to claim 3, characterized in that, The connecting column has an axial insertion hole at its front end; the telescopic sleeve has a hollow insertion tube that extends axially and is inserted into the axial insertion hole; a sealing ring is provided between the hollow insertion tube and the axial insertion hole.

5. The puncture instrument according to claim 4, characterized in that, The puncture needle axially penetrates the connecting post and communicates with the hollow cannula. The inner hole of the hollow cannula is provided with a funnel-shaped inlet at one end near the connecting post.

6. The puncture instrument according to claim 3, characterized in that, The connecting post is provided with axial limiting structures at the front and rear end faces of the connecting cap to prevent the connecting cap from moving back and forth.

7. The puncture instrument according to any one of claims 1 to 6, characterized in that, The puncture needle is provided with an ultrasonic reflective frosted surface and X-ray imaging ink scale lines on its outer periphery. The ultrasonic reflective frosted surface is located at the front end of the puncture needle and has a length of 0.5 cm. Multiple X-ray imaging ink scale lines are provided and are arranged at equal intervals along the length of the puncture needle, with a distance of 1 cm between two adjacent X-ray imaging ink scale lines.

8. The puncture instrument according to any one of claims 1 to 6, characterized in that, The handle connector has a lens tube channel inside that connects to the lens tube; the handle also has a cable connection port for transmitting visual signals; the transmission line of the electronic camera is connected to the cable connection port through the lens tube.

9. The puncture instrument according to claim 8, characterized in that, An illumination fiber is sealed at the front end of the microscope tube. The illumination fiber passes through the microscope tube and extends into the handle. An LED light source is provided inside the handle. The light emitted by the LED light source is conducted through the illumination fiber and emitted from the front end of the microscope tube.

10. The puncture instrument according to claim 8, characterized in that, It also includes a viewing screen, which is connected to the cable connector via a cable.

Images