Epidural puncture needle and suite thereof

Abstract

The utility model provides an epidural puncture needle and a suite thereof, the epidural puncture needle comprises a needle seat, a needle tube and a female Luer taper, and a through channel is arranged in the needle seat; one end of the needle tube is fixedly connected with the needle base, a cavity is formed in the needle tube in a penetrating mode, the cavity is communicated with the penetrating channel, the other end of the needle tube is bent to form a spoon-shaped face opening, and corner softening structures are arranged on the inner edge and the outer edge of the tube wall of the spoon-shaped face opening; the female Luer taper is fixed to the side, away from the needle tube, of the needle base, and a penetrating groove formed in the female Luer taper in a penetrating mode is communicated with the penetrating channel. The through channel, the cavity and the through groove are communicated with one another, so that an external epidural catheter can sequentially penetrate through the through groove, the through channel and the cavity and extend out of the spoon-shaped surface opening, the inner edge and the outer edge of the tube wall of the spoon-shaped surface opening are subjected to round corner grinding to form a corner softening structure, the sharp section at the spoon-shaped surface opening is rounded, and the service life of the tube wall is prolonged. And the epidural catheter is prevented from being rubbed and cut.

Description

Technical Field

[0001] The utility model relates to the technical field of medical treatment, in particular to an epidural puncture needle and a kit thereof. Background Art

[0002] For obese patients and those with spinal anatomy abnormalities, spinal puncture is often difficult. While lateral approach spinal puncture using body markers can address this issue to some extent, many such cases still face puncture failure. Existing studies have confirmed that ultrasound-guided spinal puncture offers significant advantages for these special patients, including significantly improving the success rate of difficult spinal punctures, reducing puncture difficulty, and shortening puncture time and injury.

[0003] Currently, ultrasound-guided spinal puncture technology has been widely used in clinical practice, with the main puncture route being the lateral approach. However, the traditional epidural puncture needle used in clinical practice is not perfectly suitable for ultrasound-guided spinal puncture.

[0004] That is, how to provide a new epidural puncture needle and its kit that can be used for ultrasound-guided lateral approach intraspinal puncture is a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] In view of the above problems, the present invention aims to provide an epidural puncture needle and a kit thereof, which at least solve at least one of the above technical problems.

[0006] In a first aspect, the utility model provides an epidural puncture needle, the epidural puncture needle comprising:

[0007] a needle seat, wherein a through passage is provided in the needle seat;

[0008] A needle tube, one end of which is fixedly connected to the needle seat, a cavity being provided through the needle tube, the cavity being connected to the through-channel, the other end of the needle tube being bent to form a spoon-shaped opening, the inner and outer edges of the tube wall of the spoon-shaped opening being provided with a corner softening structure;

[0009] A female Luer connector is fixed to a side of the needle seat away from the needle tube, and a through groove provided through the female Luer connector is connected to the through channel.

[0010] Preferably, the diameter of the through groove at one end away from the needle seat is larger than the diameter of the through groove at one end close to the needle seat, and the diameter of the through groove at one end close to the needle seat is larger than or equal to the diameter of the through channel in the needle seat.

[0011] Preferably, the plane where the spoon-shaped surface opening is located is parallel to the length direction of the needle tube.

[0012] Preferably, the needle seat comprises a barrel and a gripping portion, the gripping portion is sleeved on the periphery of the barrel, and the barrel and the gripping portion are integrally formed.

[0013] Preferably, the needle tube, the needle seat and the female Luer connector are integrally formed.

[0014] Preferably, a plurality of laser marking marks are provided at intervals on one end of the needle tube close to the opening of the spoon-shaped surface.

[0015] Preferably, the laser marking mark is formed by a plurality of recessed marks, and the plurality of recessed marks are arranged around the outer side wall of the needle tube.

[0016] Preferably, the diameter of the cavity of the needle tube is the same as the diameter of the through channel of the needle seat.

[0017] Preferably, the length of the needle tube is 8 cm to 20 cm.

[0018] In a second aspect, the present invention further provides an epidural puncture needle kit, the epidural puncture needle kit comprising:

[0019] The epidural puncture needle according to any one of the first aspects;

[0020] A needle core comprises a needle body and a male Luer connector adapted to the female Luer connector, wherein the outer diameter of one end of the male Luer connector is greater than the outer diameter of the other end of the male Luer connector, one end of the needle body is fixed to the other end of the male Luer connector, and the needle body is adapted to the structure of the needle tube.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] Specifically, the utility model provides an epidural puncture needle and its kit, including a needle seat, a needle tube and a female Luer connector, a through-channel is provided in the needle seat; one end of the needle tube is fixedly connected to the needle seat, a cavity is provided through the needle tube, the cavity is connected to the through-channel, the end of the other end of the needle tube is bent to form a spoon-shaped opening, the inner edge and the outer edge of the tube wall of the spoon-shaped opening are provided with a corner softening structure; the female Luer connector is fixed to the side of the needle seat away from the needle tube, and the through-groove provided through the female Luer connector is connected to the through-channel. The through-channel, cavity and through-groove of the present application are interconnected so that the external epidural catheter can sequentially pass through the through-groove, through-channel and cavity and extend from the spoon-shaped surface opening, and the inner and outer edges of the tube wall of the spoon-shaped surface opening are rounded and polished to form a softened corner structure, so that the sharp cross-section at the spoon-shaped surface opening is more rounded, avoiding the "friction" and "cutting" effects of the epidural catheter entering and exiting, making the catheter enter and exit the needle tube smoother, thereby avoiding serious adverse events such as damage, breakage or even permanent retention of the epidural catheter in the patient's body.

[0023] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a schematic structural diagram of an epidural puncture needle in an embodiment of the present application;

[0026] Figure 2 This is a cross-sectional schematic diagram of an epidural puncture needle in an embodiment of the present application;

[0027] Figure 3 This is a schematic diagram of the structure of an epidural catheter inserted into an epidural puncture needle in an embodiment of the present application;

[0028] Figure 4 Schematic cross-sectional view of an epidural catheter inserted into an epidural puncture needle in an embodiment of the present application;

[0029] Figure 5 This is a schematic diagram of the structure of the needle core in the embodiment of the present application from the side view;

[0030] Figure 6This is a structural diagram of the needle core in the embodiment of the present application when viewed from the front.

[0031] Reference numerals:

[0032] 1. Needle holder;

[0033] 11. Cylinder;

[0034] 12. Grip;

[0035] 13. Through passage;

[0036] 2. Needle;

[0037] 21. Spoon-shaped opening;

[0038] 3. Female Luer connector;

[0039] 31. Through slot;

[0040] 4. Laser marking;

[0041] 41. Depressed markings;

[0042] 5. Needle core;

[0043] 51. Needle body;

[0044] 52. Male Luer connector;

[0045] 6. Epidural catheter. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of this specification to clearly and completely describe the technical solutions in the embodiments of this specification. Obviously, the described embodiments are only part of the embodiments of this specification, not all of the embodiments. Based on the embodiments in this specification, all other embodiments obtained by ordinary technicians in this field are within the scope of protection of this utility model; the "and / or" keywords involved in this implementation represent both and, or. In other words, A and / or B mentioned in the embodiments of this specification represent both A and B, and A or B, and describe the three states of A and B. For example, A and / or B means: only A is included but not B; only B is included but not A; and both A and B are included.

[0047] Meanwhile, in the embodiments of this specification, when a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component. When a component is considered to be "disposed on" another component, it can be directly disposed on the other component or there may be an intermediate component.

[0048] The following describes the embodiments of the present invention through specific examples. Those skilled in the art will readily understand the other advantages and benefits of the present invention from the disclosure herein. The present invention may also be implemented or applied through various other specific embodiments, and the details in this specification may be modified or altered based on different perspectives and applications without departing from the spirit of the present invention.

[0049] Example 1

[0050] See also Figure 1-4 Specifically, in the embodiment of this epidural puncture needle, the epidural puncture needle provided by the present application specifically includes a needle seat 1, a needle tube 2 and a female Luer connector 3, and a through channel 13 is provided in the needle seat 1; one end of the needle tube 2 is fixedly connected to the needle seat 1, and a cavity is provided through the needle tube 2, and the cavity is connected to the through channel 13, and the end of the other end of the needle tube 2 is bent to form a spoon-shaped surface opening 21, and the inner edge and outer edge of the tube wall of the spoon-shaped surface opening 21 are provided with a corner softening structure; the female Luer connector 3 is fixed to the side of the needle seat 1 away from the needle tube 2, and the through groove 31 provided through the female Luer connector 3 is connected to the through channel 13.

[0051] Specifically, an embodiment of the present invention provides an epidural puncture needle, comprising a needle hub 1, a needle tube 2 and a female Luer connector 3, wherein a through channel 13 is provided in the needle hub 1; one end of the needle tube 2 is fixedly connected to the needle hub 1, a cavity is provided through the needle tube 2, and the cavity is connected to the through channel 13, and the end of the other end of the needle tube 2 is bent to form a spoon-shaped surface opening 21, and the inner edge and outer edge of the tube wall of the spoon-shaped surface opening 21 are provided with a corner softening structure; the female Luer connector 3 is fixed to the side of the needle hub 1 away from the needle tube 2, and a through groove 31 provided through the female Luer connector 3 is connected to the through channel 13. The through-channel 13, the cavity, and the through-groove 31 in the embodiment of the present application are interconnected so that the external epidural catheter 6 can sequentially pass through the through-groove 31, the through-channel 13, the cavity, and extend from the spoon-shaped surface opening 21. The inner and outer edges of the tube wall of the spoon-shaped surface opening 21 are rounded and polished to form a softened corner structure, so that the sharp cross-section at the spoon-shaped surface opening 21 is more rounded, avoiding the "friction" and "cutting" effects of the epidural catheter 6 entering and exiting, making the catheter enter and exit the needle tube 2 smoother, thereby avoiding serious adverse events such as damage, breakage, or even permanent retention of the epidural catheter 6 in the patient's body.

[0052] In one possible embodiment, the diameter of the through-groove 31 at one end away from the needle hub 1 is larger than the diameter of the through-groove 31 at one end close to the needle hub 1, and the diameter of the through-groove 31 at one end close to the needle hub 1 is larger than or equal to the diameter of the through-channel 13 in the needle hub 1, so as to form a Luer interface for easy locking with an external male Luer connector 52, and the female Luer connector 3 and the male Luer connector 52 can be threadedly connected.

[0053] In a possible embodiment, the plane where the spoon-shaped opening 21 is located is parallel to the length direction of the needle tube 2, so that the epidural catheter 6 extends out of the spoon-shaped opening 21 and has a bending angle of 90°.

[0054] In one possible embodiment, the needle seat 1 includes a barrel 11 and a gripping portion 12, and the gripping portion 12 is sleeved on the outer periphery of the barrel 11. The barrel 11 and the gripping portion 12 are integrally formed so that pressure is applied to the needle tube 2 through the gripping portion 12 to insert the spoon-shaped opening 21 of the needle tube 2 into the patient's body.

[0055] In one possible embodiment, the needle hub 1 and the female Luer connector 3 are integrally formed to simplify the device structure. The needle tube 2 and the needle hub 1 can also be configured as an integrally formed structure.

[0056] In a possible embodiment, a plurality of laser marking marks 4 are provided at intervals on one end of the needle tube 2 close to the spoon-shaped opening 21 .

[0057] Specifically, the surface of a conventional epidural puncture needle is relatively smooth, while the epidural and subarachnoid spaces are often located deep, requiring a wide puncture angle. After being emitted from the probe, the ultrasonic signal is easily scattered by the smooth surface of the needle at a wide angle, resulting in a loss of acoustic visualization of the conventional epidural puncture needle on ultrasound images, making it difficult to identify the position and direction of the puncture needle tip. The present invention provides multiple laser markings 4 at intervals on one end of the needle tube 2 near the spoon-shaped opening 21 to increase the roughness of the needle tube 2 surface, increase the anisotropy of the medium on the surface of the needle tube 2, reduce sound wave scattering, and thereby increase the echo reflection of the sound wave to the ultrasound probe, thereby enhancing the visualization of the needle tip of the needle core 5 on the ultrasound image.

[0058] When in use, the epidural puncture needle of the present application needs to be nested and used in conjunction with the needle core 5, and the outer diameter of the needle core 5 is just adapted to the inner diameter of the needle tube 2, so that when the epidural puncture needle is inserted into the patient's body, the needle core 5 can block the cavity of the needle tube 2 of the epidural puncture needle to prevent liquid from spraying out and entering the cavity.

[0059] The length of the needle core 5 is adapted to the length from one end of the needle seat 1 away from the needle tube 2 to the other end of the needle tube 2. When the epidural puncture needle and the needle core 5 are nested for use, the needle tip of the needle core 5 is just located at the end of the needle tube 2 without puncturing the needle tube 2 or even protruding.

[0060] Furthermore, the laser marking mark 4 is formed by a plurality of recessed marks 41 , and the plurality of recessed marks 41 are circumferentially arranged on the outer side wall of the needle tube 2 .

[0061] The laser marking mark 4 is a recessed mark 41. The recessed mark 41 on the surface of the needle tube 2 further increases the echo reflection of sound waves to the ultrasound probe, enhancing the visualization of the needle tip on the ultrasound image. The present invention's multiple laser marking marks 4, arranged at intervals, not only determine the position of the needle tip of the needle core 5 but also the puncture direction of the needle tube 2, greatly enhancing the efficiency and safety of the puncture.

[0062] In a possible embodiment, the diameter of the cavity of the needle tube 2 is smaller than or equal to the diameter of the through channel 13 of the needle seat 1 .

[0063] In a possible embodiment, the length of the needle tube 2 is set to 8 cm-20 cm.

[0064] Specifically, the length of the needle tube 2 can be set accordingly according to actual conditions to meet the needs of different patients. The length of the needle tube 2 can be set to be greater than 8 cm, so that obese patients can avoid being unable to complete the puncture due to insufficient length during epidural puncture, thereby improving the success rate of difficult intraspinal punctures, reducing the difficulty of punctures, and reducing puncture time and puncture damage.

[0065] Example 2

[0066] The present invention also provides an epidural puncture needle kit. The epidural puncture needle kit provided in this embodiment specifically includes: a needle core 5 and an epidural puncture needle as described in any one of the first embodiments. The needle core 5 includes a needle body 51 and a male Luer connector 52 adapted to the female Luer connector 3. The outer diameter of one end of the male Luer connector 52 is larger than the outer diameter of the other end of the male Luer connector 52. One end of the needle body 51 is fixed to the other end of the male Luer connector 52. The structure of the needle body 51 is adapted to the structure of the needle tube 2. The outer diameter of the needle body 51 is adapted to the inner diameter of the needle tube 2. The length of the needle core 5 is adapted to the length from the end of the needle hub 1 away from the needle tube 2 to the other end of the needle tube 2. The end of the other end of the needle core has a curved structure, and the curved structure is adapted to the spoon-shaped surface structure of the needle tube. The edges of the curved structure of the needle core are all rounded to prevent friction and cutting of the needle tube when the needle core is removed from the needle tube.

[0067] Specifically, when in use, the epidural puncture needle of the present application needs to be nested with the needle core 5 for use, such as Figure 5-6 The illustrated needle core 5 has an outer diameter of needle body 51 that precisely matches the inner diameter of needle tube 2. This allows the core 5 to block the lumen of the epidural puncture needle tube 2 when the epidural puncture needle is inserted into the patient, preventing blood from spurting out or entering the lumen. Furthermore, the length of the core 5 matches the length of the needle hub 1 from one end distal to the needle tube 2 to the other end of the needle tube 2. That is, when the epidural puncture needle and core 5 are nested for use, the tip of the core 5 rests precisely on the end of the needle tube 2 without puncturing the needle tube 2 or even protruding from it.

[0068] Furthermore, the laser marking mark 4 near the spoon-shaped surface opening 21 corresponds to the position of the needle tip of the needle core 5 when the epidural puncture needle needs to be nested with the needle core 5 for use, and the laser marking mark 4 can enhance the visualization ability of the needle tip on the ultrasound image.

[0069] It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for understanding and reading by those familiar with this technology, and are not used to limit the conditions for implementation of the present invention. Therefore, they have no substantial technical significance. Any modification of the structure, change in the proportional relationship, or adjustment of the size should still fall within the scope of the technical content disclosed in the present invention without affecting the efficacy and purpose of the present invention. At the same time, terms such as "upper", "lower", "left", "right", "middle" and "one" quoted in this specification are only for the convenience of description and are not used to limit the scope of implementation of the present invention. Changes or adjustments in their relative relationships should also be considered as the scope of implementation of the present invention without substantially changing the technical content.

[0070] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the profession can make some changes or modifications to the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. An epidural puncture needle, characterized in that: The epidural puncture needle comprises: a needle seat, wherein a through passage is provided in the needle seat; A needle tube, one end of which is fixedly connected to the needle seat, a cavity being provided through the needle tube, the cavity being connected to the through-channel, the other end of the needle tube being bent to form a spoon-shaped opening, the inner and outer edges of the tube wall of the spoon-shaped opening being provided with a corner softening structure; A female Luer connector is fixed to a side of the needle seat away from the needle tube, and a through groove provided through the female Luer connector is connected to the through channel.

2. The epidural puncture needle according to claim 1, wherein: The diameter of the through slot at one end away from the needle seat is larger than the diameter of the through slot at one end close to the needle seat, and the diameter of the through slot at one end close to the needle seat is larger than or equal to the diameter of the through channel in the needle seat.

3. The epidural puncture needle according to claim 1, wherein: The plane where the spoon-shaped surface opening is located is parallel to the length direction of the needle tube.

4. The epidural puncture needle according to claim 1, wherein: The needle seat comprises a cylinder and a gripping portion, wherein the gripping portion is sleeved on the periphery of the cylinder, and the cylinder and the gripping portion are integrally formed.

5. The epidural puncture needle according to claim 1, wherein: The needle tube, the needle seat and the female Luer connector are integrally formed.

6. The epidural puncture needle according to claim 1, wherein: One end of the needle tube close to the opening of the spoon-shaped surface is provided with multiple laser marking marks at intervals.

7. The epidural puncture needle according to claim 6, wherein: The laser marking mark is formed by a plurality of recessed marks, and the plurality of recessed marks are arranged around the outer side wall of the needle tube.

8. The epidural puncture needle according to claim 1, wherein: The diameter of the cavity of the needle tube is the same as the diameter of the through channel of the needle seat.

9. The epidural puncture needle according to claim 1, wherein: The length of the needle tube is 8 cm to 20 cm.

10. An epidural puncture needle kit, characterized in that: The epidural needle kit includes: The epidural puncture needle according to any one of claims 1 to 9; A needle core comprises a needle body and a male Luer connector adapted to the female Luer connector, wherein the outer diameter of one end of the male Luer connector is greater than the outer diameter of the other end of the male Luer connector, one end of the needle body is fixed to the other end of the male Luer connector, and the needle body is adapted to the structure of the needle tube.

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