Puncture guide cannula of puncture needle

Abstract

The puncture guide cannula comprises a cannula body, a connecting sleeve is fixedly installed on the outer wall of the cannula body through a connecting mechanism, a compression cylinder is installed in the connecting sleeve in a sliding mode, and fixing pins are installed on the outer walls of the two sides of the connecting sleeve in a sliding and penetrating mode. And inserting holes matched with the fixing pins are formed in the outer walls of the two sides of the compression cylinder correspondingly, shifting blocks are fixedly installed at the ends of the two fixing pins correspondingly, and the inner walls of the two shifting blocks are connected with the outer wall of the connecting sleeve through locking mechanisms correspondingly. By arranging the compression cylinder, the sliding plate, the compression spring and other components, when the compression spring is stressed and deformed in the process of moving and placing the guide tube, the guide tube is inaccurately positioned in the arterial blood vessel, and then the sleeve and the guide tube can be moved again, so that the arterial blood vessel wall can be prevented from being damaged, and the medical burden of a patient can be prevented from being increased. The accuracy of embedding the cannula and the guide tube is greatly improved, the embedding time is shortened, and the occurrence of artery blood vessel injury complications is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a puncture guide sleeve of a puncture needle. Background Art

[0002] A puncture needle is usually a rigid tube with a sharp tip. It is an interventional radiology device that is mainly used to puncture parts of the human body to collect human samples, inject drugs and gases, etc., or serve as a channel for other instruments to enter the body.

[0003] When injecting chemotherapy drugs into the internal iliac artery, the normal puncture process is to make a transverse incision on the outside of the skin with a scalpel, and use a laparoscope to poke the blood vessel through the incision. If blood is drawn out of the syringe, it indicates that the artery has been punctured, and then the cannula is inserted. However, the existing scalp needles are not convenient to fix, and the positioning in the blood vessel is inaccurate, making it difficult to insert accurately. Since it is unknown where the blood vessel is punctured, violent advancement can easily damage the blood vessel wall, increase the medical burden on patients, and lack practicality. Therefore, it is necessary to redesign a puncture guide cannula for the puncture needle to address the above problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and provides a puncture guide sleeve for a puncture needle.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A puncture guide sleeve for a puncture needle comprises a sleeve, the outer wall of the sleeve is fixedly installed with a connecting sleeve through a connecting mechanism, a compression sleeve is slidably installed inside the connecting sleeve, the outer walls on both sides of the connecting sleeve are slidably penetrated with fixing pins, the outer walls on both sides of the compression sleeve are provided with jacks that cooperate with the fixing pins, the ends of the two fixing pins are fixedly installed with shift blocks, the inner walls of the two shift blocks are connected to the outer wall of the connecting sleeve through a locking mechanism, a slide plate is slidably installed inside the compression sleeve, the outer wall of the slide plate is fixedly installed with a guide tube connected with its inner wall, a compression spring is installed inside the compression sleeve, and the two compression springs are connected to the outer wall of the compression sleeve. The ends are elastically connected to the compression cylinder and the inner wall of the slide plate respectively, a needle core is slidably installed inside the guide tube, a connecting tube is fixedly installed on the end of the needle core, a rotating wing is rotatably installed on the outer wall of the connecting tube through a thread, two support plates are fixedly installed on the outer wall of the compression cylinder through a fixing mechanism, extrusion rods are slidably penetrated and installed on the outer walls of the two support plates, limiting plates are fixedly installed on the outer walls of the two extrusion rods, the inner walls of the two limiting plates are connected to the outer wall of the support plate on the same side through the extrusion mechanism, extrusion wheels are rotatably installed on the ends of the two extrusion rods through a connecting frame, and anti-slip teeth are provided on the outer walls of the two extrusion wheels.

[0007] Preferably, the connecting mechanism comprises a connecting plate fixedly mounted on the outer wall of the sleeve, and the connecting sleeve is fixedly mounted on the upper end surface of the connecting plate.

[0008] Preferably, the locking mechanism comprises a fixing spring installed on the outer wall of the fixing pin, and two ends of the fixing spring are elastically connected to the outer wall of the connecting sleeve and the inner wall of the shifting block respectively.

[0009] Preferably, the fixing mechanism comprises a fixing plate fixedly mounted on the outer wall of the compression cylinder, and the two supporting plates are fixedly mounted on the upper end surface of the fixing plate.

[0010] Preferably, the extrusion mechanism comprises an extrusion spring installed on the outer wall of the extrusion rod, and two ends of the extrusion spring are elastically connected to the outer wall of the support plate and the inner wall of the limiting plate respectively.

[0011] Preferably, a rotating shaft fixedly connected to the extrusion wheel on the same side is rotatably mounted on the outer wall of one of the connecting frames, and a knob is fixedly mounted on the outer wall of the rotating shaft.

[0012] Beneficial effects of the utility model:

[0013] 1. By setting up components such as a compression cylinder, a slide plate and a compression spring, when the compression spring is deformed under force during the process of moving and inserting the guide tube, it means that the guide tube is not accurately positioned in the artery. Then the sheath and the guide tube can be moved again, thereby avoiding damage to the arterial wall and increasing the medical burden of the patient, greatly improving the accuracy of the sheath and guide tube insertion, shortening the insertion time, and reducing the occurrence of complications of arterial injury.

[0014] 2. By setting components such as an extrusion spring, an extrusion wheel and a rotating shaft, under the elastic action of the extrusion spring, the two extrusion wheels can squeeze and clamp the outer wall of the connecting tube, and the knob is turned to drive one of the extrusion wheels to rotate through the cooperation of the rotating shaft. The extrusion wheel then drives the connecting tube to move through the cooperation of the anti-slip teeth, thereby allowing the connecting tube to drive the needle core to move and complete the puncture, thereby increasing the stability of the needle core during puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a puncture guide sleeve of a puncture needle proposed by the utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of the vertical section structure;

[0017] Figure 3 This is a schematic diagram of the top view of the puncture guide sleeve of a puncture needle proposed by the utility model;

[0018] Figure 4 for Figure 1 A schematic diagram of the structure enlargement at point A;

[0019] Figure 5 for Figure 2 Schematic diagram of the enlarged structure at point B in FIG.

[0020] In the figure: 1 sleeve, 2 connecting plate, 3 connecting sleeve, 4 compression cylinder, 5 fixing pin, 6 shift block, 7 fixing spring, 8 slide plate, 9 guide tube, 10 compression spring, 11 needle core, 12 connecting tube, 13 rotating wing, 14 fixing plate, 15 supporting plate, 16 extrusion rod, 17 limiting plate, 18 extrusion spring, 19 connecting frame, 20 extrusion wheel, 21 rotating shaft, 22 knob. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Figure 1-5 A puncture guide sleeve of a puncture needle comprises a sleeve 1, an outer wall of the sleeve 1 is fixedly installed with a connecting sleeve 3 through a connecting mechanism, the connecting mechanism comprises a connecting plate 2 fixedly installed on the outer wall of the sleeve 1, the connecting sleeve 3 is fixedly installed on the upper end surface of the connecting plate 2, a compression cylinder 4 is slidably installed inside the connecting sleeve 3, and fixing pins 5 are slidably penetrated and installed on the outer walls of both sides of the connecting sleeve 3, and jacks cooperating with the fixing pins 5 are provided on the outer walls of both sides of the compression cylinder 4, and shift blocks 6 are fixedly installed on the ends of the two fixing pins 5, and the inner walls of the two shift blocks 6 are connected to the outer wall of the connecting sleeve 3 through a locking mechanism, and the locking mechanism comprises a fixing spring 7 installed on the outer wall of the fixing pin 5, and the two ends of the fixing spring 7 are elastically connected to the outer wall of the connecting sleeve 3 and the inner wall of the shift block 6 respectively.

[0023] A slide plate 8 is slidably installed inside the compression cylinder 4, and a guide tube 9 connected to the inner wall of the slide plate 8 is fixedly installed on the outer wall of the slide plate 8. A compression spring 10 is installed inside the compression cylinder 4. The compression cylinder 4 is made of transparent medical plastic material, and the inside can be seen through, so as to observe the extension of the compression spring 10. The two ends of the compression spring 10 are elastically connected to the compression cylinder 4 and the inner wall of the slide plate 8 respectively. A needle core 11 is slidably installed inside the guide tube 9. The head of the needle core 11 has a curvature of 15-20 degrees. A connecting tube 12 is fixedly installed on the end of the needle core 11. A rotating wing 13 is installed on the outer wall of the connecting tube 12 by threaded rotation. The rotating wing 13 can facilitate the fixing of the needle core 11. Two support plates 15 are fixedly installed on the outer wall of the compression cylinder 4 through a fixing mechanism. The fixing mechanism includes a fixing plate 14 fixedly installed on the outer wall of the compression cylinder 4, and the two support plates 15 are fixedly installed on the upper end surface of the fixing plate 14.

[0024] The outer walls of the two support plates 15 are slidably penetrated by an extrusion rod 16, and the outer walls of the two extrusion rods 16 are fixedly installed with a limit plate 17. The inner walls of the two limit plates 17 are connected to the outer wall of the support plate 15 on the same side through an extrusion mechanism. The extrusion mechanism includes an extrusion spring 18 installed on the outer wall of the extrusion rod 16, and the two ends of the extrusion spring 18 are elastically connected to the outer wall of the support plate 15 and the inner wall of the limit plate 17 respectively. The ends of the two extrusion rods 16 are rotatably installed with an extrusion wheel 20 through a connecting frame 19. The outer walls of the two extrusion wheels 20 are provided with anti-skid teeth. The extrusion wheel 20 and the anti-skid teeth are both made of rubber material. The rubber material has good elasticity and softness, which enables it to form a closer contact between the surface and the object, thereby increasing friction and improving the friction coefficient. A rotating shaft 21 fixedly connected to the extrusion wheel 20 on the same side is rotatably installed on the outer wall of one of the connecting frames 19, and a knob 22 is fixedly installed on the outer wall of the rotating shaft 21.

[0025] When the utility model is used, the compression cylinder 4 is first slidably installed inside the connecting sleeve 3, and then the fixing pin 5 is moved to the jack under the drive of the fixing spring 7, thereby realizing the connection and fixation between the compression cylinder 4 and the connecting sleeve 3, thereby realizing the installation of the guide tube 9 and the needle core 11. When the puncture needle is used, the guide tube 9 can be moved inside the blood vessel through the sleeve 1. During the movement, if the guide tube 9 is obstructed, it can squeeze the compression spring 10 through the slide plate 8. When the compression spring 10 is deformed by force, it means that the guide tube 9 is not accurately positioned in the arterial blood vessel. Then the sleeve 1 and the guide tube 9 can be moved again, thereby avoiding damage to the arterial blood vessel wall, increasing the medical burden of the patient, greatly improving the accuracy of the insertion of the sleeve 1 and the guide tube 9, shortening the insertion time, and reducing the occurrence of complications of arterial blood vessel damage.

[0026] When the needle core 11 is pushed forward, the two squeezing rods 16 can respectively drive the connecting frame 19 to move under the elastic action of the squeezing spring 18, and the two connecting frames 19 can respectively drive the squeezing wheels 20 to clamp the outer wall of the connecting tube 12 through the anti-slip teeth, and then the knob 22 can be turned to drive one of the squeezing wheels 20 to rotate through the cooperation of the rotating shaft 21, and the squeezing wheel 20 can drive the connecting tube 12 to move through the cooperation of the anti-slip teeth, thereby allowing the connecting tube 12 to drive the needle core 11 to move and complete the puncture. The clamping and movement of the two squeezing wheels 20 can increase the stability of the needle core 11 during puncture, and with the cooperation of the rotating wing 13, the connecting tube 12 can drive the needle core 11 to rotate, and the rotating wing 13 can facilitate the clamping and fixation of the instrument after insertion.

[0027] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A puncture guide sleeve for a puncture needle, characterized in that: The invention comprises a sleeve (1), wherein a connecting sleeve (3) is fixedly installed on the outer wall of the sleeve (1) through a connecting mechanism, a compression cylinder (4) is slidably installed inside the connecting sleeve (3), fixing pins (5) are slidably installed on the outer walls on both sides of the connecting sleeve (3), and plug holes matching the fixing pins (5) are provided on the outer walls on both sides of the compression cylinder (4), and two shifting blocks (6) are fixedly installed on the ends of the two fixing pins (5), and the inner walls of the two shifting blocks (6) are connected to the outer wall of the connecting sleeve (3) through a locking mechanism, a slide plate (8) is slidably installed inside the compression cylinder (4), and a guide tube (9) connected to the inner wall of the slide plate (8) is fixedly installed on the outer wall of the slide plate (8), and a compression spring (10) is installed inside the compression cylinder (4), and the two ends of the compression spring (10) are respectively connected to the compression cylinder (4) and the slide plate. (8) The inner wall is elastically connected, a needle core (11) is slidably installed inside the guide tube (9), a connecting tube (12) is fixedly installed at the end of the needle core (11), and a rotating wing (13) is rotatably installed on the outer wall of the connecting tube (12) through a thread, and two support plates (15) are fixedly installed on the outer wall of the compression cylinder (4) through a fixing mechanism, and an extrusion rod (16) is slidably installed through the outer walls of the two support plates (15), and a limiting plate (17) is fixedly installed on the outer walls of the two extrusion rods (16), and the inner walls of the two limiting plates (17) are connected to the outer wall of the support plate (15) on the same side through an extrusion mechanism, and the ends of the two extrusion rods (16) are rotatably installed with an extrusion wheel (20) through a connecting frame (19), and the outer walls of the two extrusion wheels (20) are provided with anti-slip teeth.

2. The puncture guide sleeve of a puncture needle according to claim 1, characterized in that: The connection mechanism comprises a connection plate (2) fixedly mounted on the outer wall of the sleeve (1), and the connection sleeve (3) fixedly mounted on the upper end surface of the connection plate (2).

3. The puncture guide sleeve of a puncture needle according to claim 2, characterized in that: The locking mechanism comprises a fixing spring (7) mounted on the outer wall of the fixing pin (5), and two ends of the fixing spring (7) are elastically connected to the outer wall of the connecting sleeve (3) and the inner wall of the shifting block (6) respectively.

4. The puncture guide sleeve of a puncture needle according to claim 3, characterized in that: The fixing mechanism comprises a fixing plate (14) fixedly mounted on the outer wall of the compression cylinder (4), and the two supporting plates (15) are both fixedly mounted on the upper end surface of the fixing plate (14).

5. The puncture guide sleeve of a puncture needle according to claim 4, characterized in that: The extrusion mechanism comprises an extrusion spring (18) mounted on the outer wall of the extrusion rod (16), and two ends of the extrusion spring (18) are elastically connected to the outer wall of the support plate (15) and the inner wall of the limit plate (17), respectively.

6. The puncture guide sleeve of a puncture needle according to claim 5, characterized in that: A rotating shaft (21) fixedly connected to the extrusion wheel (20) on the same side is rotatably mounted on the outer wall of one of the connection frames (19), and a knob (22) is fixedly mounted on the outer wall of the rotating shaft (21).

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