Epidural targeted puncture kit

Abstract

The utility model discloses an epidural targeted puncture kit, comprising an outer needle tube, the end of which is coaxially fixedly connected to a cylindrical outer needle seat; an inner needle tube, the end of which is coaxially fixedly connected to a cylindrical inner needle seat, the inner needle tube is slidably arranged on the inner side of the outer needle tube, the front end of the inner needle tube is closed, and a side opening is opened at the front end of the inner needle tube; a cushion block is an annular structure, and is detachably arranged between the outer needle seat and the inner needle seat, and the inner needle tube passes through the cushion block. After the puncture kit of the utility model is completed, the drug passes through the inner needle tube and enters the human body through the side opening. At this time, the position of the side opening can be fine-tuned by changing the length of the inner needle tube extending from the front end of the outer needle tube, and the direction of the side opening can be adjusted by rotating the inner needle tube, so that the drug flowing out of the side opening can reach the target position more accurately, increase the speed at which the drug takes effect, and thus improve the treatment effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of medical devices, and in particular relates to an epidural targeted puncture kit. Background Art

[0002] An epidural needle is a sterile puncture needle used for epidural anesthesia, usually used to puncture the epidural space to provide anesthesia and analgesia to the patient during the procedure.

[0003] The existing epidural puncture needle includes a needle tube and a liner core. After the puncture is completed, the liner core is removed and the drug solution is injected through the needle tube. During the injection process, the drug solution can only flow forward from the front end of the needle tube. The flow direction of the drug solution cannot be more accurately controlled, thereby slowing down the speed at which the drug solution reaches the target position and affecting the treatment effect.

[0004] Therefore, it is necessary to improve the epidural puncture needle in the prior art. Utility Model Content

[0005] The purpose of the utility model is to overcome the defects in the prior art and provide an epidural targeted puncture kit to improve the treatment effect of the puncture kit.

[0006] To achieve the above purpose, the specific technical solution of the epidural targeted puncture kit of the utility model is as follows:

[0007] An epidural targeted puncture kit, comprising:

[0008] The outer needle tube has a cylindrical outer needle seat coaxially fixedly connected to the end thereof;

[0009] The inner needle tube has a cylindrical inner needle seat coaxially fixedly connected to the end thereof, the inner needle tube is slidably arranged inside the outer needle tube, the front end of the inner needle tube is closed, and a side opening is opened at the front end of the inner needle tube;

[0010] The cushion block is an annular structure and is detachably disposed between the outer needle seat and the inner needle seat, and the inner needle tube passes through the cushion block;

[0011] The pad is configured to switch the puncture kit between a puncture state and a drug delivery state;

[0012] In the puncture state, the cushion block is installed between the outer needle seat and the inner needle seat, so that the distance between the outer needle seat and the inner needle seat is increased, and the side opening is received inside the front end of the outer needle tube;

[0013] In the drug delivery state, the cushion block is removed from between the outer needle seat and the inner needle seat, so that the distance between the outer needle seat and the inner needle seat is reduced, and the side opening is extended to the outside of the front end of the outer needle tube.

[0014] Preferably, in order to make the front end of the puncture kit sharper and easier to puncture, the front end of the inner needle tube is a pointed end, and in the puncture state, the pointed end is located outside the front end of the outer needle tube.

[0015] Preferably, in order to reduce the probability of the outer needle tube damaging surrounding human tissue after the puncture is completed, the front end of the outer needle tube is a flat end.

[0016] Preferably, in order to improve the stability of the installation of the cushion block and the convenience of disassembly and assembly, the front end of the outer needle seat is fixedly connected to the outer needle tube, and the terminal end face of the outer needle seat is provided with a limiting slot along the axis perpendicular to the outer needle tube, and the cushion block is provided with a connecting strip that is plugged into and cooperates with the limiting slot.

[0017] Preferably, in order to improve the stability of the inner needle tube during the puncture process, a threaded sleeve is coaxially arranged on the side of the inner needle seat adjacent to the inner needle tube, and the threaded sleeve is threadedly connected to the cushion block.

[0018] Preferably, in order to improve the convenience of disassembly and assembly of the cushion block, a notch is provided on one side of the cushion block, the minimum width of the notch is larger than the outer diameter of the inner needle tube, and the outer needle tube passes through the notch parallel to the straight line where the diameter of the limiting slot lies.

[0019] Preferably, in order to improve the stability of the cushion block during the puncture process, the length of the threaded sleeve is greater than the thickness of the cushion block.

[0020] Preferably, in order to clear the inner needle tube and reduce the chance of blockage, a needle core is slidably fitted inside the inner needle tube, a handle is provided at the end of the needle core, and the handle sealing cover is provided on the end of the inner needle seat away from the inner needle tube.

[0021] The epidural targeted puncture kit of the present invention has the following advantages: after the puncture kit is completed, the drug enters the human body through the inner needle tube and the side opening. At this time, the position of the side opening can be fine-tuned by changing the length of the inner needle tube extending from the front end of the outer needle tube, and the direction of the side opening can be adjusted by rotating the inner needle tube, so that the drug flowing out of the side opening can reach the target position more accurately, thereby increasing the speed at which the drug takes effect and thus improving the treatment effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the puncture kit of the utility model in the puncture state;

[0023] Figure 2 It is a structural schematic diagram of the puncture kit of the utility model in the drug delivery state;

[0024] Figure 3 It is a schematic diagram of the explosion structure of the puncture kit of the utility model;

[0025] Figure 4 It is a cross-sectional view of the puncture kit of the utility model;

[0026] Figure 5 It is a schematic diagram of the connection structure between the outer needle tube and the outer needle seat of the utility model;

[0027] Figure 6 It is a schematic diagram of the connection structure between the inner needle tube and the inner needle seat of the utility model;

[0028] Figure 7 It is a structural schematic diagram of the cushion block of the utility model;

[0029] Explanation of the markings in the figure: 1. outer needle tube; 101. outer needle seat; 102. limiting slot; 103. flat end; 2. cushion block; 201. connector strip; 202. notch; 3. inner needle tube; 301. inner needle seat; 302. threaded sleeve; 303. side opening; 304. pointed end; 4. needle core; 401. handle. DETAILED DESCRIPTION

[0030] The following is a further description of the specific implementation of the present invention in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0031] The terms "top surface", "bottom surface" and "underside" are based on the normal use state of the epidural targeted puncture kit and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0032] like Figure 1-4 As shown, an epidural targeted puncture kit includes an outer needle tube 1, the end of which is coaxially fixedly connected to a cylindrical outer needle seat 101; an inner needle tube 3, the end of which is coaxially fixedly connected to a cylindrical inner needle seat 301, the inner needle tube 3 is slidably arranged on the inner side of the outer needle tube 1, the front end of the inner needle tube 3 is closed, and a side opening 303 is opened at the front end of the inner needle tube 3; a cushion block 2, which is an annular structure and is detachably arranged between the outer needle seat 101 and the inner needle seat 301, and the inner needle tube 3 passes through the cushion block 2.

[0033] The pad 2 is configured to switch the puncture state and the drug delivery state of the puncture kit; in the puncture state, the pad 2 is installed between the outer needle seat 101 and the inner needle seat 301, so that the distance between the outer needle seat 101 and the inner needle seat 301 is increased, and the side opening 303 is received inside the front end of the outer needle tube 1; in the drug delivery state, the pad 2 is removed from between the outer needle seat 101 and the inner needle seat 301, so that the distance between the outer needle seat 101 and the inner needle seat 301 is reduced, and the side opening 303 is extended to the outside of the front end of the outer needle tube 1.

[0034] When the above-mentioned targeted puncture kit is used, the puncture kit first performs a puncture operation, that is, the puncture kit is in a puncture state, in which the cushion block 2 lifts the inner needle seat 301 to increase the distance between the inner needle seat 301 and the outer needle seat 302, and the inner needle seat 301 drives the inner needle tube 3 to move toward the inside of the front end of the outer needle tube 1, so that the side opening 303 enters the interior of the outer needle tube 1. At this time, the side opening 303 can be closed by the outer needle tube 1, and the front end of the inner needle tube 3 is located inside the front end of the outer needle tube 1 to achieve the closure of the front end of the outer needle tube 1. At this time, the front ends of the inner needle tube 3 and the outer needle tube 1 are both in a closed state, which is conducive to the puncture of the puncture kit, and the inner needle tube 3 can support the outer needle tube 1. The combination of the two can greatly improve the strength, ensure that the needle tube is in a straight state during the puncture process, and improve the puncture effect.

[0035] After the puncture is completed, the front end of the outer needle tube 1 reaches the vicinity of the target medication position, and the drug is injected at this time, that is, the puncture kit is in the medication delivery state. In this state, the cushion block 2 is removed, and the positioning effect between the outer needle seat 101 and the inner needle seat 301 disappears; at this time, the inner needle tube 3 can be pushed by the inner needle seat 301 to move toward the front end of the outer needle tube 1, so that the side opening 303 opened on the side of the front end of the inner needle tube 3 extends to the outside of the front end of the outer needle tube 1, and by pushing and pulling the inner needle seat 301, it is used to fine-tune the position of the side opening 303 along the axial direction of the outer needle tube 1, and by rotating the inner needle seat 301, the direction of the side opening 303 can be adjusted, so that the position of the side opening 303 is closer to the target medication position, and then the drug is sent into the inner needle tube 3 and directly sent to the target position from the side opening 303, so as to achieve targeted drug delivery, accelerate the onset of the drug, and improve the therapeutic effect.

[0036] When the above-mentioned puncture kit is in use, the outer wall of the inner needle tube 3 fits against the inner wall of the outer needle tube 1, which can improve the sealing effect of the front end of the outer needle tube 1 and the side opening 303, and at the same time, a certain friction resistance can be generated between the two, thereby improving the feel of the inner needle tube 3 when adjusting, and improving the adjustment accuracy. The surface of the outer needle tube 1 is also provided with scales along the axial direction to improve the accuracy of controlling the puncture depth of the outer needle tube 1, further improve the puncture accuracy of the puncture kit, and improve the treatment effect.

[0037] A further improvement is, Figure 1 and 6 As shown, the front end of the inner needle tube 3 is a pointed end 304, and in the puncture state, the pointed end 304 is located outside the front end of the outer needle tube 1. In the puncture state, only the pointed end 304 of the puncture kit just completely protrudes from the front end surface of the outer needle tube 101, so that during the puncture process, the sharpness of the puncture kit is improved by the pointed end 304, thereby reducing the resistance of the puncture kit during puncture, and improving the convenience of the puncture kit.

[0038] A further improvement is, Figure 5 As shown, the front end of the outer needle tube 1 is a flat end 103. Compared with the outer needle tube 1 with a sharp front end, the setting of the flat end 103 reduces the sharpness of the front end of the outer needle tube 1; so that after the puncture is completed, even if the outer needle tube 1 shakes during the operation of the cushion block 2 and the inner needle tube 3 and the drug delivery process, the blunt front end of the outer needle tube 1 is not easy to pierce the human tissue, and the outer needle tube 1 has a large resistance and is not easy to move, thereby improving the accuracy of the position adjustment of the contralateral opening 303.

[0039] When using the above-mentioned puncture kit to puncture through important structures of the human body, such as the dura mater sac or the side of the nerve root, the inner needle tube 3 can be completely retracted into the interior of the front end of the outer needle tube 1, or the inner needle tube 3 can be directly taken out, so that the puncture can be pushed forward alone through the blunt-headed outer needle tube 1. This can reduce the probability of puncturing important structures of the human body during the advancement of the outer needle tube 1, thereby reducing the damage caused during the puncture process.

[0040] A further improvement is, Figure 5 and 7 As shown, the front end of the outer needle seat 101 is fixedly connected to the outer needle tube 1, and the end surface of the outer needle seat 101 is provided with a limited slot 102 along the axial direction perpendicular to the outer needle tube 1, and the cushion block 2 is provided with a plug-in strip 201 that is plugged in and matched with the limited slot 102. The limited slot 102 can be a dovetail slot or a T-slot. After the matching limited slot 102 and the plug-in strip 201 are plugged in, the cushion block 2 can be firmly connected to the outer needle seat 101, the stability of the cushion block 2 installation is improved, and then the stability of the puncture kit when in use is improved, and it is also more convenient to disassemble the cushion block 2.

[0041] A further improvement is, Figure 6 and 7 As shown, a threaded sleeve 302 is coaxially arranged on the side of the inner needle seat 301 adjacent to the inner needle tube 3, and the threaded sleeve 302 is threadedly connected to the cushion block 2. The inner circumferential surface of the cushion block 2 is provided with an internal thread matching the threaded sleeve. During the puncture process, the threaded sleeve 302 and the cushion block 2 connected by threads can play a positioning role for the inner needle seat 301, and then play a positioning role for the inner needle tube 3, which can offset the reverse thrust received by the inner needle tube 3 during the puncture process of the puncture kit, improve the stability of the connection between the inner needle tube 3 and the outer needle tube 1, and then improve the reliability of the puncture kit during the puncture process.

[0042] A further improvement is, Figure 7As shown, one side of the cushion block 2 has a notch 202, the minimum width of which is greater than the outer diameter of the inner needle tube 3, and the outer needle tube 1 passes through the notch 202 parallel to the straight line where the diameter of the limiting slot 102 is located. During the disassembly of the cushion block 2, the cushion block 2 slides laterally along the limiting slot 102 toward the outer needle seat 101. During this process, the notch 202 is provided for the inner needle tube 3 to pass through, so that when the cushion block 2 is disassembled, the inner needle tube 3 that passes through the cushion block 2 does not need to be completely withdrawn from the inner side of the cushion block 2, thereby saving the time spent on the insertion and removal of the inner needle tube 3, and improving the convenience of using the puncture kit.

[0043] A further improvement is, Figure 4 As shown, the length of the threaded sleeve 302 is greater than the thickness of the cushion block 2. The portion of the threaded sleeve 302 that exceeds the cushion block 2 can extend to the inner side of the outer needle seat 101, so that the threaded sleeve 302 and the outer needle seat 101 play a mutual limiting role, and then the threaded sleeve 302 limits the radial sliding of the cushion block 2 along the outer needle tube 1, thereby improving the stability of the installation of the cushion block 2 and the reliability of the connection between the outer needle seat 101 and the inner needle seat 301.

[0044] A further improvement is, Figure 3 and 4 As shown, the inner needle tube 3 is also slidably fitted with a needle core 4, the end of the needle core 4 is provided with a handle 401, and the sealing cover of the handle 401 is provided on the end of the inner needle seat 301 away from the inner needle tube 3. The setting of the needle core 4 can fill the inner space of the inner needle tube 3, so that the puncture kit as a whole forms a solid structure, and during the puncture process, the overall strength of the puncture kit is improved; and the setting of the needle core 4 can also play a role in unblocking the inner needle tube 3, and improve the convenience of using the puncture kit.

[0045] It is understood that the present invention is described by some embodiments, and those skilled in the art are aware that various changes or equivalent substitutions may be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, under the teachings of the present invention, these features and embodiments may be modified to adapt to specific circumstances and materials without departing from the spirit and scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. An epidural targeted puncture kit, characterized in that: include: An outer needle tube (1) has a distal end coaxially and fixedly connected to a cylindrical outer needle seat (101); An inner needle tube (3), the end of which is coaxially fixedly connected to a cylindrical inner needle seat (301), the inner needle tube (3) being slidably arranged on the inner side of the outer needle tube (1), the front end of the inner needle tube (3) being closed, and a side opening (303) being provided at the front end of the inner needle tube (3); The cushion block (2) is an annular structure and is detachably arranged between the outer needle seat (101) and the inner needle seat (301); the inner needle tube (3) is arranged to penetrate the cushion block (2); The cushion block (2) is configured to switch the puncture kit between a puncture state and a drug delivery state; In the puncture state, the cushion block (2) is installed between the outer needle seat (101) and the inner needle seat (301), so that the distance between the outer needle seat (101) and the inner needle seat (301) is increased, and the side opening (303) is received inside the front end of the outer needle tube (1); In the drug delivery state, the cushion block (2) is removed from between the outer needle seat (101) and the inner needle seat (301), so that the distance between the outer needle seat (101) and the inner needle seat (301) is reduced, and the side opening (303) is extended to the outside of the front end of the outer needle tube (1).

2. The epidural targeted puncture kit according to claim 1, characterized in that: The front end of the inner needle tube (3) is a pointed end (304). In the puncture state, the pointed end (304) is located outside the front end of the outer needle tube (1).

3. The epidural targeted puncture kit according to claim 1, characterized in that: The front end of the outer needle tube (1) is a flat end (103).

4. The epidural targeted puncture kit according to claim 1, characterized in that: The front end of the outer needle seat (101) is fixedly connected to the outer needle tube (1), and the end surface of the outer needle seat (101) is provided with a limiting slot (102) along an axial direction perpendicular to the outer needle tube (1), and the cushion block (2) is provided with a plug-in strip (201) that is plugged into and matched with the limiting slot (102).

5. The epidural targeted puncture kit according to claim 4, characterized in that: A threaded sleeve (302) is coaxially arranged on the side surface of the inner needle seat (301) adjacent to the inner needle tube (3), and the threaded sleeve (302) is threadedly connected to the cushion block (2).

6. The epidural targeted puncture kit according to claim 4 or 5, characterized in that: One side of the cushion block (2) has a notch (202), the minimum width of the notch (202) being greater than the outer diameter of the inner needle tube (3), and a straight line of the outer needle tube (1) parallel to the diameter of the limiting slot (102) passes through the notch (202).

7. The epidural targeted puncture kit according to claim 5, characterized in that: The length of the threaded sleeve (302) is greater than the thickness of the cushion block (2).

8. The epidural targeted puncture kit according to claim 1, characterized in that: A needle core (4) is also slidably fitted inside the inner needle tube (3), a handle (401) is provided at the end of the needle core (4), and a sealing cover of the handle (401) is provided on an end of the inner needle seat (301) facing away from the inner needle tube (3).

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