Improved lumbar puncture needle

Abstract

The utility model relates to the technical field of medical instruments, in particular to an improved lumbar puncture needle. Comprising a hollow puncture needle body and a needle core, scales are arranged on the hollow puncture needle body, the hollow puncture needle body further comprises a supporting limiter, the supporting limiter is used for supporting the hollow puncture needle body and limiting the puncture depth of the hollow puncture needle body, and the scales are arranged on the outer wall of the hollow puncture needle body, so that medical staff can observe the puncture depth conveniently during puncture, and the puncture depth is limited. Meanwhile, the supporting and limiting assembly is arranged and used for supporting the hollow puncture needle, the situation that in long-time puncture, the position of the hollow puncture needle moves, and the patient is affected is avoided, the puncture depth is limited through the supporting and limiting assembly, and the situation that the patient is injured due to excessive puncture in the puncture process is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to an improved lumbar puncture needle. Background Art

[0002] Lumbar puncture (LP) is a commonly used clinical diagnostic and treatment operation, which is used to examine the properties of cerebrospinal fluid, measure intracranial pressure, and inject drugs intrathecally, etc. During the puncture, the doctor holds the LP needle and inserts it into the human body. When there is a breakthrough feeling during the puncture in the human body, the doctor pulls out the LP needle core and judges whether the puncture is successful based on whether the LP needle core has cerebrospinal fluid. If there is no cerebrospinal fluid at the head of the LP needle core, the puncture is repeated, and this is repeated until there is cerebrospinal fluid at the head of the LP needle core. The above operation is time-consuming and inefficient. It is very easy to cause repeated punctures when performing punctures on patients (especially children, who have low cooperation and will significantly affect the doctor's perception of the breakthrough feeling during puncture). The existing LP needle cannot directly identify whether the puncture is successful during the puncture process.

[0003] In a patent application for a lumbar puncture needle with patent number CN218651965U, it includes a hollow puncture needle and a needle core. One end of the hollow puncture needle is a puncture end. A connecting channel is formed in the hollow puncture needle. The connecting channel extends along the length direction of the hollow puncture needle and passes through the two ends of the hollow puncture needle. A detection component is set at one end of the needle core. The end of the needle core away from the detection component is used to extend into the connecting channel from the end of the hollow puncture needle away from the puncture end, so that the end of the needle core away from the detection component contacts the puncture end. The detection component is used to detect whether the needle core contacts cerebrospinal fluid when the puncture end pierces the area to be punctured in the human body.

[0004] The existing device solves the problem that the lumbar puncture needle cannot identify whether the puncture is successful during puncture. However, the existing lumbar puncture needle has no scale and the puncture depth cannot be confirmed. At the same time, the lumbar puncture takes a long time. If an intrathecal injection operation is performed, the puncture time is further extended. The puncture needle is easy to change its position, which poses a danger to the patient. Summary of the invention

[0005] There is no scale on the existing lumbar puncture needle, and the puncture depth cannot be confirmed. At the same time, there is no corresponding structure to fix the lumbar puncture needle. Since lumbar puncture takes a long time, if an intrathecal injection operation is performed, the puncture time is also long. During the puncture, the lumbar puncture needle is easy to change its position, causing danger to the patient.

[0006] In order to overcome the problems existing in the prior art, the utility model provides an improved lumbar puncture needle. By providing a scale on the lumbar puncture needle, the puncture depth can be clearly seen during the puncture process. At the same time, a corresponding structure is provided to fix the lumbar puncture needle to the patient's body, thereby ensuring the stability of the lumbar puncture needle during the puncture process. This is safer for patients and also reduces the workload of medical staff.

[0007] The above technical objectives of the utility model are achieved through the following technical solutions:

[0008] An improved lumbar puncture needle comprises a hollow puncture needle and a needle core, wherein the needle core extends into the hollow puncture needle. The invention is characterized in that the hollow puncture needle is provided with a scale and also comprises a support limiter, wherein the support limiter is used to support the hollow puncture needle and limit the puncture depth of the hollow puncture needle.

[0009] Furthermore, the support limiter includes a support portion and a limit portion, the support portion is arranged on the limit portion, and the limit portion is sleeved outside the hollow puncture needle.

[0010] The limiting portion comprises a limiting ring and a limiting extension plate, and the limiting extension plate is disposed at the end of the limiting ring.

[0011] Preferably, the supporting portion comprises a supporting column, and the supporting column is arranged on the limiting ring.

[0012] The limit extension plate is connected with a controller for controlling the size of the limit ring.

[0013] Compared with the prior art, the beneficial effects of the utility model are embodied in:

[0014] The device sets a scale on the hollow puncture needle, so that medical staff can clearly see the puncture depth when performing puncture. At the same time, a support limiter is set to support the hollow puncture needle and limit the puncture depth of the hollow puncture needle. During puncture, the puncture needle can be supported on the patient's body surface, which is convenient for medical staff to perform puncture during the puncture process. If the lumbar puncture needle can be relatively fixed during the puncture process, it is safer for the patient and reduces the burden on the doctor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model.

[0016] Figure 2 For the utility model Figure 1 Schematic diagram of the top view structure.

[0017] Figure 3 It is a structural schematic diagram of the cross section of the utility model after the needle core is inserted into the hollow puncture needle.

[0018] Figure 4 For this utility model Figure 1 Enlarged view of part A.

[0019] Figure 5 It is a structural schematic diagram of the support limiter of the utility model.

[0020] Figure 6 It is a structural schematic diagram of the limiting part of the utility model.

[0021] Figure 7 It is a structural schematic diagram of the controller of the utility model.

[0022] The marks in the figure respectively represent: 1. hollow puncture needle; 11. puncture end; 12. connection channel; 13. first hand-held component; 14. connecting through hole; 2. needle core; 21. metal core; 22. insulation layer; 23. metal outer layer; 24. second hand-held component; 25. insertion end; 3. limit ring; 4. controller; 41. bolt; 42. nut; 5. limit extension plate; 6. support column. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, in the description of the present invention, the meaning of "several" is two or more, unless otherwise clearly and specifically defined.

[0025] The inventors have found that during lumbar puncture, the existing lumbar puncture needle is not set with corresponding scales. Medical staff cannot observe the puncture depth during the puncture process, which affects their judgment. At the same time, since lumbar puncture takes a long time, the puncture needle is easy to change position, which will cause danger to the patient.

[0026] Based on the above findings, the present application provides an improved lumbar puncture needle. By setting a scale on the outer wall of the hollow puncture needle, medical staff can observe the puncture depth during puncture. At the same time, a support and limit assembly is provided to support the hollow puncture needle to prevent the position of the hollow puncture needle from moving during long-term puncture, which may affect the patient. The support and limit assembly is used to limit the puncture depth.

[0027] See also Figure 1-7 The lumbar puncture needle of the utility model comprises a hollow puncture needle 1 and a needle core 2, one end of the hollow puncture needle 1 is a puncture end 11, a connecting channel 12 is formed in the hollow puncture needle 1, and the connecting channel 12 extends along the length direction of the hollow puncture needle 1 and connects the two ends of the hollow puncture needle 1.

[0028] It should be noted that, in the present application, the insertion end 25 of the needle core 2 is used to extend into the connecting channel 12 from an end of the hollow puncture end 11 away from the puncture end 11 , so that the end of the needle core 2 away from the insertion end contacts the puncture end 11 .

[0029] Preferably, a first hand-held component 13 is provided at the end of the hollow puncture needle 1 away from the puncture end 11, and a connecting through hole 14 is provided in the first hand-held component 13, and the connecting through hole 14 is connected to the connecting channel 12. The setting of the first hand-held component 13 can facilitate the doctor to hold the hollow puncture needle 1 and insert it into the human body.

[0030] In the above technical solution, the first hand-held component 13 and the hollow puncture needle 1 are threadedly connected. This structural setting facilitates the separation of the first hand-held component 13 from the hollow puncture needle 1 after a successful puncture, and facilitates the doctor to collect the cerebrospinal fluid flowing out of the hollow puncture needle 1 through a glass bottle (due to the pressure difference between the inside and outside of the human body, the cerebrospinal fluid flows out of the human body through the connecting channel 12 under the action of pressure).

[0031] Furthermore, the needle core 2 is provided with a metal core 21, an insulating layer 22 and a metal outer layer 23 in sequence from the inside to the outside.

[0032] Specifically, a second hand-held component 24 is provided at one end of the needle core 2, and the needle core 2 passes through the connecting through hole 14 and enters the connecting channel 12, so that the second hand-held component 24 is inserted into the connecting through hole 14, and the first hand-held component 13 and the second hand-held component 24 are detachably connected. The detachable connection between the first hand-held component 13 and the second hand-held component 24 can facilitate the connection between the needle core 2 and the hollow puncture needle 1, which is convenient for the doctor to perform hand-held puncture.

[0033] As an example, a scale is provided on the outer wall of the hollow puncture needle 1, and during puncture, medical staff can observe and record the puncture depth at any time.

[0034] Furthermore, the utility model also includes a support stopper, which is used to support the hollow puncture needle 1 and limit the puncture depth of the hollow puncture needle 1.

[0035] Optionally, the support limiter includes a support portion and a limit portion, the support portion is arranged on the limit portion, and the limit portion is sleeved outside the hollow puncture needle 1.

[0036] Likewise, it should be noted that, in the present application, the support portion includes a support column 6, the support column 6 is cylindrical, and the end of the support column 6 is in contact with the patient's skin.

[0037] In a specific example of the present invention, the end of the support column 6 is coated with a medical adhesive material, which is used to stick the support column 6 to the patient's body, thereby sticking the support limiter to the patient's body. During the puncture process, the stability of the hollow puncture needle 1 is ensured, and the movement of the hollow puncture needle 1 is avoided to prevent injury to the patient.

[0038] In the above technical solution, the limiting portion includes a limiting ring 3 and a limiting extension plate 5 , and the limiting extension plate 5 is arranged at the end of the limiting ring 3 .

[0039] It is understandable that the limiting ring 3 is an ellipse with a notch, and a limiting extension plate 5 is provided at the notch of the ellipse, and the limiting extension plate 5 is a rectangle.

[0040] Particularly, a controller 4 for controlling the size of the limiting ring 3 is provided on the limiting extension plate 5 .

[0041] Optionally, the controller 4 is a combination of the bolt 41 and the nut 42 .

[0042] In some embodiments, the bolt 41 passes through the limit extension plate 5 and cooperates with the nut 42 to control the separation and combination of the limit extension plate 5, thereby driving the opening size of the limit ring 3 through the separation and combination of the limit extension plate 5.

[0043] It should be supplemented that the material of the limiting ring 3 is medical plastic, such as polyethylene and polypropylene.

[0044] In a specific application, when the medical staff pushes the hollow puncture needle 1 into the patient's body as needed, the nut 42 is loosened, the limit extension plate 5 is separated, the space in the limit ring 3 is increased, and the pressure on the hollow puncture needle 1 is reduced, which facilitates the advancement of the hollow puncture needle 1 into the patient's body. After puncturing to a certain extent, the nut 42 is tightened, the limit extension plate 5 is combined, the space in the limit ring 3 is reduced, and the pressure on the hollow puncture needle 1 is increased, thereby achieving the fixation of the hollow puncture needle 1 and ensuring the stability of the hollow puncture needle 1 during and after the puncture.

[0045] Furthermore, the connecting channel 12 is used for the passage of cerebrospinal fluid.

[0046] The application scenario of the improved lumbar puncture needle of the utility model in the specific lumbar puncture process is: the support column 6 is glued to the patient's body, and the doctor holds the hollow puncture needle 1 and slowly pierces the patient's skin. After puncturing to a certain extent, the needle core 2 is pulled out, and the cerebrospinal fluid flows out through the connecting channel 12, and the cerebrospinal fluid is collected to complete the lumbar puncture operation.

[0047] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred embodiments of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which shall fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. An improved lumbar puncture needle, comprising a hollow puncture needle (1) and a needle core (2), wherein the needle core (2) extends into the hollow puncture needle (1), characterized in that: The hollow puncture needle (1) is provided with a scale and also comprises a support stopper, wherein the support stopper is used to support the hollow puncture needle (1) and limit the puncture depth of the hollow puncture needle (1).

2. An improved lumbar puncture needle according to claim 1, characterized in that: The support stopper comprises a support portion and a limit portion, the support portion is arranged on the limit portion, and the limit portion is sleeved outside the hollow puncture needle (1).

3. An improved lumbar puncture needle according to claim 2, characterized in that: The limiting portion comprises a limiting ring (3) and a limiting extension plate (5), and the limiting extension plate (5) is provided at the end of the limiting ring (3).

4. An improved lumbar puncture needle according to claim 3, characterized in that: The support portion comprises a support column (6), and the support column (6) is arranged on the limiting ring (3).

5. An improved lumbar puncture needle according to claim 4, characterized in that: The limit extension plate (5) is connected to a controller (4) for controlling the size of the limit ring (3).

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