Pad-propelled lumbar puncture device for children

Abstract

The present invention discloses a latch-propelled pediatric lumbar puncture device, which comprises a puncture assembly, a pipe fitting, and a pushing assembly. The puncture assembly comprises a puncture needle and a needle core. The puncture needle is hollow, and the needle core is pluggably arranged in the puncture needle. A sliding hole for the needle core to slide is provided in the pipe fitting, and the sliding hole is arranged along the length direction of the pipe fitting. The pipe fitting has a connecting cavity for the puncture assembly to move, and the connecting cavity opens outward and is connected to the sliding hole. A convex structure is provided outside the puncture needle, and the pushing assembly has a driving recess engaged with the convex structure. The pushing assembly is movably arranged in the connecting cavity, and the driving recess drives the convex structure to move and links the puncture assembly to move by pushing the pushing assembly. The latch-propelled pediatric lumbar puncture device of the present invention has the advantages of simple structure, high success rate, and low damage and pain.

Description

Technical Field

[0001] The invention relates to the field of medical supplies, and in particular to a tooth-propelled lumbar puncture device for children. Background Art

[0002] Lumbar puncture is a necessary and common examination method for puncturing and extracting cerebrospinal fluid to diagnose neurological diseases. The traditional method requires a doctor with certain clinical experience to hold the lumbar puncture needle in his hand, use the 3-4 intervertebral space of the lumbar vertebra as the puncture point, and insert the needle deep or shallow based on experience and look for a breakthrough feeling, pull out the needle core, and see if spinal fluid drips out, so as to observe whether the puncture needle has entered the subarachnoid space. If spinal fluid drips out, the puncture is successful.

[0003] This method has certain defects and can easily lead to puncture failure. For example, some children have poorly developed tendon ligaments and sometimes there is no breakthrough feeling when the needle is inserted, making the puncture unsuccessful. Since the human body has multiple layers of tissue, puncture requires manual puncture layer by layer until the target layer is punctured and spinal fluid flows out to be successful. Therefore, it is necessary to observe the outflow of spinal fluid at each layer to judge success. Since the manual needle is inserted at a non-uniform speed and the force is difficult to control, it is sometimes easy to puncture too deep, puncturing the subarachnoid space and causing damage, or directly bypassing the target layer and puncturing into deeper tissues, resulting in medical staff being unable to discharge fluid no matter how they puncture.

[0004] In order to solve the above problems, it is necessary to provide a tooth-propelled pediatric lumbar puncture device. Summary of the invention

[0005] The purpose of the present invention is to provide a tooth-propelled pediatric lumbar puncture device with high success rate, simple structure and little damage and pain.

[0006] In order to achieve the above-mentioned purpose, the present invention provides a tooth-propelled pediatric lumbar puncture device, which includes a puncture assembly, a tube and a pushing assembly. The puncture assembly includes a puncture needle and a needle core. The puncture needle is hollow, and the needle core is pluggably arranged in the puncture needle. A sliding hole for the needle core to slide is provided in the tube, and the sliding hole is arranged along the length direction of the tube. The tube has a connecting cavity for the puncture assembly to move, and the connecting cavity opens outward and is connected with the sliding hole. A protruding structure is provided on the outside of the puncture needle, and the pushing assembly has a driving recess engaged with the protruding structure. The pushing assembly is movably arranged in the connecting cavity. By pushing the pushing assembly, the driving recess drives the protruding structure to move and links the puncture assembly to move.

[0007] Preferably, the pushing component moves in a step-by-step manner.

[0008] Preferably, the pushing assembly includes a pushing button, a connecting piece, an elastic sheet and a locking piece, the pushing button is installed on the elastic sheet, the opening of the connecting cavity is provided with locking teeth arranged along the length direction of the tube, the elastic sheet has elastic locking teeth cooperating with the locking teeth, and the elasticity of the elastic locking teeth enables the elastic sheet to elastically retract when it slides relative to the connecting cavity, the pushing button is installed on the top end surface of the elastic sheet, one end of the connecting piece is connected to one side of the elastic sheet, and the other end of the connecting piece is connected to the locking piece, and the driving recess is opened on the side of the locking piece facing the protruding structure.

[0009] Specifically, the connecting piece is an elastic connecting rod.

[0010] Specifically, there are at least two of the connecting members and the elastic sheets, all of which are spaced apart along the length direction of the push button, and the elastic sheets correspond one-to-one to the connecting members; there are at least two of the protruding structures, all of which are spaced apart along the length direction of the push button, and the protruding structures correspond one-to-one to the engaging members.

[0011] Specifically, the engaging member is a U-shaped ring structure.

[0012] Specifically, the connecting cavity includes a sliding cavity and a narrow cavity, the narrow cavity is located on one side of the sliding cavity close to the sliding hole, the cross-section of the narrow cavity is smaller than the cross-section of the sliding cavity, the push button and the elastic sheet are located in the sliding cavity, and the connecting piece and the engaging piece are located in the narrow cavity.

[0013] Preferably, the sliding hole is a penetrating circular hole.

[0014] Preferably, the protrusion structure is a ring-shaped protrusion structure arranged around the circumference of the puncture needle.

[0015] Preferably, the pipe is a transparent round tube.

[0016] Compared with the prior art, the latch-propelled pediatric lumbar puncture device of the present invention combines a puncture component, a tube and a pushing component together. The puncture component includes a puncture needle and a needle core. The puncture needle is hollow and the needle core is insertable and removable in the puncture needle. The puncture needle can gradually puncture the tissue, and then the needle core is taken out of the puncture needle, and then the puncture position is accurate and the success of the puncture is judged by observing whether the spinal fluid flows out. A sliding hole for the needle core to slide is provided in the tube, and the needle core can be slid in the sliding hole so that the needle core can be punctured to the target position by gradual sliding. The sliding hole is arranged along the length direction of the tube, and the tube has a connecting cavity for the puncture component to move. The connecting cavity opens outward and is connected with the sliding hole. A convex structure is provided on the outside of the puncture needle, and the pushing component has a driving recess that engages with the convex structure. The setting of the connecting cavity and the sliding hole enables the driving recess of the pushing component to form a snap connection with the convex structure of the puncture needle. The pushing component is movably arranged on The connecting cavity is configured so that the driving concave driving convex structure moves and the puncture component moves in conjunction with it. When the needle core and the puncture needle are inserted into the sliding hole, the convex structure of the puncture needle engages with the driving concave of the pushing component. Therefore, the movement of the pushing component can drive the movement of the puncture needle. Since the sliding hole can guide the puncture needle, the operator can drive the puncture needle to puncture by pushing the pushing component. Each time a certain position is punctured, it is judged whether the puncture position is in place and whether the puncture is successful by observing whether the spinal fluid of each layer of tissue flows out. Because the pushing component is a fixed tooth grid that moves to drive the puncture needle to advance, and one tooth grid can be less than or equal to the diameter of the subarachnoid space, the puncture needle is not easy to penetrate the subarachnoid space and is easy to achieve successful puncture, avoiding the phenomenon of puncture failure caused by excessive force in traditional manual puncture and deviation of the puncture needle. It is easy to operate and greatly improves the success rate of puncture. It has a simple structure and is convenient for cleaning or disinfection and recycling. It is safe and stable and can reduce the pain of patients. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the planar structure of the latch-propelled pediatric lumbar puncture device of the present invention when viewed from the side.

[0018] Figure 2 yes Figure 1 A partial enlarged view of point A in the middle.

[0019] Figure 3 It is a schematic plan view of the structure of the latch-propelled pediatric lumbar puncture device of the present invention when viewed from above after the puncture assembly is hidden.

[0020] Figure 4 It is a schematic structural diagram of the puncture assembly in the latch-propelled pediatric lumbar puncture device of the present invention. DETAILED DESCRIPTION

[0021] In order to explain the technical content, structural features and achieved effects of the present invention in detail, the following is a detailed description in conjunction with the implementation methods and the accompanying drawings.

[0022] See also Figures 1 to 4 , shows the specific structure of the tooth-propelled pediatric lumbar puncture device 100 of the present invention, which includes a puncture component 1, a tube 2 and a push component 3. The puncture component 1 includes a puncture needle 11 and a needle core 12. The puncture needle 11 is hollow, and the needle core 12 is pluggable in the puncture needle 11. The puncture needle 11 can gradually puncture the tissue, and then the needle core 12 is removed from the puncture needle 11, and then the puncture position is judged to be accurate and the success of the puncture is judged by observing whether the spinal fluid flows out. The tube 2 is provided with a sliding hole 21 for the needle core 12 to slide. The needle core 1 2 can be slidably arranged in the sliding hole 21 so that the needle core 12 can be punctured to the target position by gradual sliding. The sliding hole 21 is arranged along the length direction of the tube 2. The tube 2 has a connecting cavity 22 for the puncture component 1 to move. The connecting cavity 22 opens outward and is connected with the sliding hole 21. The puncture needle 11 is provided with a protruding structure 111 on the outside. The pushing component 3 has a driving recess 311 engaged with the protruding structure 111. The arrangement of the connecting cavity 22 and the sliding hole 21 can enable the driving recess 311 of the pushing component 3 to form an engaging connection with the protruding structure 111 of the puncture needle 11. Then, the pushing component 3 is movably arranged in the connecting cavity 22. By pushing the pushing component 3, the driving recess 311 drives the convex structure 111 to move and link the puncture component 1 to move. When the needle core 12 and the puncture needle 11 are inserted into the sliding hole 21, the convex structure 111 of the puncture needle 11 is engaged with the driving recess 311 of the pushing component 3. Therefore, the movement of the pushing component 3 can drive the movement of the puncture needle 11. Since the sliding hole 21 can guide the puncture needle 11, the operator can drive the puncture needle 11 to puncture by pushing the pushing component 3. The position of the puncture is determined by observing whether the spinal fluid of each layer of tissue flows out to determine whether the puncture is in place and whether the puncture is successful. Because the push component 3 is a fixed tooth grid that moves to drive the puncture needle 11 to advance, and a tooth grid can be less than or equal to the diameter of the subarachnoid space, the puncture needle 11 is not easy to penetrate the subarachnoid space and is easy to achieve successful puncture, avoiding the phenomenon of traditional manual puncture with excessive force and puncture needle 11 deviation leading to puncture failure, easy to operate, greatly improve the success rate of puncture, simple structure and convenient cleaning or disinfection and recycling, safe and stable and can reduce the pain of patients. More specifically, as follows:

[0023] See also Figures 1 to 3The pushing component 3 moves in a step-by-step manner. The step-by-step movement enables the nursing staff to puncture each layer of the tissue step by step, so that the nursing staff can perform step-by-step puncture more stably and accurately, thereby meeting the puncture requirements. Specifically, the push assembly 3 includes a push button 32, a connecting member 33, an elastic sheet 34 and a clamping member 31. The push button 32 is mounted on the elastic sheet 34. A clamping tooth 35 is arranged along the length direction of the pipe 2 at the opening of the connecting cavity 22. The elastic sheet 34 has an elastic clamping tooth 341 that cooperates with the clamping tooth 35. The elasticity of the elastic clamping tooth 341 causes the elastic sheet 34 to elastically retract when sliding relative to the connecting cavity 22. When the elastic sheet 34 moves to a position or stops relative to the connecting cavity 22, the elastic clamping tooth 341 is clamped with the clamping tooth 35 under the action of elastic recovery, so that the push assembly 3 is locked in position without external force. The push button 32 is mounted on the top surface of the elastic sheet 34. One end of the connecting member 33 is connected to one side of the elastic sheet 34. The other end of the connecting member 33 is connected to the clamping member 31. The driving recess 311 is opened on the side of the clamping member 31 facing the protruding structure 111. Preferably, the clamping member 31 is a U-shaped ring structure, but is not limited thereto. It is understandable that the propulsion assembly 3 can drive the puncture needle 11 to advance forward step by step or to retreat backward step by step.

[0024] See also Figure 1 to Figure 2 Furthermore, the connecting piece 33 is an elastic connecting rod. It can be understood that the connecting rod is a slightly elastic connecting rod, that is, it has a slight elasticity without affecting its pushing effect. The slight elasticity can drive the concave 311 and the convex structure 111 to interfere with each other when the puncture needle 11 enters the sliding hole 21 under the action of external force, but it is precisely by utilizing the slight elasticity that the driving concave 311 and the convex structure 111 can remain engaged under the action of external force.

[0025] See also Figure 1 to Figure 2 , the number of the connecting piece 33 and the elastic sheet 34 are at least two, all the connecting pieces 33 are arranged at intervals along the length direction of the push button 32, the elastic sheet 34 corresponds to the connecting piece 33 one by one, and the number of the protruding structure 111 is at least two, all the protruding structures 111 are arranged at intervals along the length direction of the push button 32, and the protruding structure 111 corresponds to the engaging piece 31 one by one, so that the pushing stability can be improved. The pushing component 3 is arranged on the side close to the needle tip of the puncture needle 11, that is, the protruding structure 111 and the driving recess 311 are both located on the side close to the needle tip of the puncture needle 11, so that the pushing force is concentrated on the side close to the needle tip of the puncture needle 11, which can not only form a guiding effect, but also improve the accuracy and stability of the puncture.

[0026] See also Figure 3The connecting cavity 22 includes a sliding cavity 221 and a narrow cavity 222. The narrow cavity 222 is located on one side of the sliding cavity 221 close to the sliding hole 21. The cross section of the narrow cavity 222 is smaller than the cross section of the sliding cavity 221. The push button 32 and the elastic sheet 34 are located in the sliding cavity 221. The connecting piece 33 and the engaging piece 31 are located in the narrow cavity 222. The mutual coordination of the sliding cavity 221 and the narrow cavity 222 enables the sliding cavity 221 to provide the sliding hole 21 for the push button 32, and the narrow cavity 222 can minimize the exposed part of the sliding cavity 221. Preferably, the sliding hole 21 is a through circular hole, and the protruding structure 111 is a ring-shaped protruding structure 111 arranged around the circumference of the puncture needle 11, which can avoid interference in movement. The pipe 2 is a transparent round tube, which enables medical staff to better observe the discharge of spinal fluid.

[0027] In summary, please refer to Figures 1 to 4 The following is a detailed description of the use of the tooth-propelled pediatric lumbar puncture device 100 of the present invention:

[0028] When in use, first disinfect it according to the sterile requirements. After surface anesthesia is performed on the puncture point, the needle core 12 is sheathed in the hollow hole of the puncture needle 11. At this time, there is no gap between the needle core 12 and the puncture needle 11. The puncture needle 11 is inserted into the sliding hole 21. When the protruding structure 111 slides to the driving recess 311, the connecting piece 33 produces elastic deformation to allow the puncture needle 11 to continue to slide. When sliding into place, the protruding structure 111 engages with the driving recess 311, and the head end of the needle core 12 is aligned with the puncture point. Fix the skin of the puncture site with one hand, and hold the tooth-propelled pediatric lumbar puncture device of the present invention with the other hand to slowly insert the needle in a direction perpendicular to the plane of the child's spine. Specifically, push the push button 32, and the movement of the push button 32 drives the connecting piece 33 and the driving recess 311 to engage. When the elastic sheet 34 slides relative to the connecting cavity 22, the elasticity of the elastic latch 341 causes elastic retraction. Since the protruding structure 111 is engaged with the driving recess 311, the protruding structure 111 is pushed forward step by step under the linkage action, so that the puncture needle 11 and the needle core 12 gradually penetrate into each layer of tissue. When the elastic sheet 34 moves to the position or stops relative to the connecting cavity 22, the elastic latch 341 is engaged with the engaging tooth 35 under the action of elastic recovery, so that the pushing component 3 can achieve position locking without external force. During the puncture process of each layer of tissue, that is, when puncturing to different depths, the nursing staff pulls out the needle core 12 from the puncture needle 11. When the spinal fluid flows out, the puncture is successful. If it does not flow out, puncture deeper again until the spinal fluid flows out. After the operation is completed, the pushing component 3 is used to drive the puncture needle 11 to step back the puncture needle 11 step by step, and the tube 2 is removed, and the bandage is completed.

[0029] The puncture assembly 1, the tube 2 and the push assembly 3 are combined together. The puncture assembly 1 includes a puncture needle 11 and a needle core 12. The puncture needle 11 is hollow. The needle core 12 is pluggable in the puncture needle 11. The puncture needle 11 can gradually puncture the tissue. Then, by removing the needle core 12 from the puncture needle 11, it is judged whether the puncture position is accurate and whether the puncture is successful by observing whether the spinal fluid flows out. A sliding hole 21 for the needle core 12 to slide is opened in the tube 2. The needle core 12 can be slidably arranged in the sliding hole 21 so that the needle core 12 can be inserted into the sliding hole 21. The tube 2 has a connecting cavity 22 for the puncture assembly 1 to move, and the connecting cavity 22 opens outward and communicates with the sliding hole 21. The puncture needle 11 is provided with a protruding structure 111 on the outside, and the pushing assembly 3 has a driving recess 311 engaged with the protruding structure 111. The arrangement of the connecting cavity 22 and the sliding hole 21 enables the driving recess 311 of the pushing assembly 3 to form an engaging connection with the protruding structure 111 of the puncture needle 11. The pushing assembly 3 is movably provided. In the connecting cavity 22, by pushing the pushing component 3, the driving recess 311 drives the convex structure 111 to move and link the puncture component 1 to move. When the needle core 12 and the puncture needle 11 are inserted into the sliding hole 21, the convex structure 111 of the puncture needle 11 is engaged with the driving recess 311 of the pushing component 3. Therefore, the movement of the pushing component 3 can drive the movement of the puncture needle 11. Since the sliding hole 21 can guide the puncture needle 11, the operator can drive the puncture needle 11 to puncture by pushing the pushing component 3. Each puncture to a certain position is observed. Observe whether the spinal fluid of each layer of tissue flows out to judge whether the puncture position is in place and whether the puncture is successful or not. Because the pushing component 3 is a fixed tooth grid that moves to drive the puncture needle 11 to advance, and one tooth grid can be less than or equal to the diameter of the subarachnoid space, the puncture needle 11 is not easy to penetrate the subarachnoid space and it is easy to achieve successful puncture, avoiding the phenomenon of puncture failure caused by excessive force in traditional manual puncture and deviation of the puncture needle 11. It is easy to operate and greatly improves the success rate of puncture. It has a simple structure and is convenient for cleaning or disinfection and recycling. It is safe and stable and can reduce the pain of patients.

[0030] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the scope of the patent application of the present invention still fall within the scope covered by the present invention.

Claims

1. A tooth-propelled lumbar puncture device for children, characterized in that: The invention comprises a puncture component, a tube and a pushing component, wherein the puncture component comprises a puncture needle and a needle core, the puncture needle is hollow, the needle core is pluggably arranged in the puncture needle, a sliding hole for the needle core to slide is provided in the tube, the sliding hole is arranged along the length direction of the tube, the tube has a connecting cavity for the movement of the puncture component, the connecting cavity opens outward and is connected with the sliding hole, a convex structure is arranged on the outside of the puncture needle, the pushing component has a driving recess engaged with the convex structure, the pushing component is movably arranged in the connecting cavity, and the driving recess drives the convex structure to move and links the puncture component to move by pushing the pushing component; the pushing component is step-by-step The push assembly includes a push button, a connecting piece, an elastic sheet and a locking piece, wherein the push button is mounted on the elastic sheet, and a locking tooth is arranged along the length direction of the tube at the opening of the connecting cavity, and the elastic sheet has an elastic locking tooth that cooperates with the locking tooth, and the elasticity of the elastic locking tooth causes the elastic sheet to elastically retract when sliding relative to the connecting cavity, the push button is mounted on the top end surface of the elastic sheet, one end of the connecting piece is connected to one side of the elastic sheet, and the other end of the connecting piece is connected to the locking piece, and the driving recess is opened on the side of the locking piece facing the protruding structure; the protruding structure is a ring-shaped protruding structure arranged circumferentially around the puncture needle.

2. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: The connecting piece is an elastic connecting rod.

3. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: There are at least two of the connecting members and the elastic sheets, all of which are spaced apart along the length direction of the push button, and the elastic sheets correspond one to one with the connecting members. There are at least two of the protruding structures, all of which are spaced apart along the length direction of the push button, and the protruding structures correspond one to one with the engaging members.

4. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: The engaging piece is a U-shaped ring structure.

5. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: The connecting cavity includes a sliding cavity and a narrow cavity, the narrow cavity is located on one side of the sliding cavity close to the sliding hole, the cross section of the narrow cavity is smaller than the cross section of the sliding cavity, the push button and the elastic sheet are located in the sliding cavity, and the connecting piece and the engaging piece are located in the narrow cavity.

6. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: The sliding hole is a penetrating circular hole.

7. The tooth-propelled pediatric lumbar puncture device according to claim 1, characterized in that: The pipe fitting is a transparent round pipe.

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