A lumbar cistern drainage and administration device

Abstract

The application belongs to the technical field of medical supplies, and particularly relates to a lumbar cistern drainage and medicine administration device which comprises a connecting seat, a liquid storage bag, a catheter, a guide puncture needle and a puncture needle. After the insertion end of the guide puncture needle enters the subarachnoid space, the temperature of the cerebrospinal fluid increases the temperature of the first limiting part, and then the first limiting structure becomes an arched curve shape, and then the side wall of the first limiting part arches, and then the catheter in the subarachnoid space is prevented from moving out of the subarachnoid space, and at the same time, the catheter reserved below the partition plate is moved outward, and then the development needs are compensated through the reserved catheter, and then the catheter is prevented from being separated from the subarachnoid space. When the catheter needs to be taken out, low-temperature normal saline is slowly injected into the catheter through the liquid storage bag, and then the temperature of the catheter is reduced, and then the temperature of the first metal sheet is reduced, and then the first limiting structure becomes a straight line shape, and then the first limiting part is contracted, and then the catheter is conveniently pulled out.

Description

Technical Field

[0001] This invention belongs to the field of medical supplies technology, specifically a lumbar fossa drainage and drug delivery device. Background Technology

[0002] In clinical practice in neurosurgery, neurology, and hematology, it is often necessary to perform lumbar punctures to drain cerebrospinal fluid and administer medications. This is especially important for patients with hematologic disorders and central nervous system diseases, such as childhood leukemia, lymphoma, and central nervous system tumors, who require such procedures to be performed repeatedly over a long period of time.

[0003] Current drainage and drug delivery devices typically have a catheter of a certain length pre-installed in the subarachnoid space. As the patient (mainly younger patients whose bodies are still growing and developing) grows, the catheter in the subarachnoid space can move outward to compensate for the growth needs. Because the subarachnoid space of patients is relatively small, pre-installing a catheter that is too long will increase the chance of rejection. If the pre-installed catheter is too short, it will not be able to meet the needs of growth and may easily detach from the subarachnoid space, requiring another lumbar puncture. Summary of the Invention

[0004] To overcome the shortcomings of existing technologies, this invention proposes a lumbar cistern drainage and drug delivery device. This invention primarily addresses the problem that current drainage and drug delivery devices typically leave a catheter of a certain length within the subarachnoid space to compensate for growth needs. However, if the length of this catheter is too short, it is insufficient to meet the growth requirements, and the catheter is prone to detaching from the subarachnoid space.

[0005] The technical solution adopted by this invention to solve its technical problem is as follows: This invention provides a lumbar cistern drainage and drug delivery device, including a connecting seat, a reservoir, a catheter, a guiding puncture needle, and an insertion needle; one end of the catheter is provided with an insertion end; the end of the insertion end is provided with an arc structure; the insertion end is provided with a first limiting part; a first metal plate is provided on the side wall of the first limiting part; the first metal plates are evenly spaced along the circumference of the catheter; the first metal plates are cast together with the raw material of the catheter; the first metal plates are made of a two-way metal shape memory alloy; The first metal sheet has a first limiting structure in its middle; the first limiting structure becomes a straight line at low temperatures and an arched curve at high temperatures; a first circular hole is provided on the side wall of the insertion end; the first circular holes are evenly spaced; the guide tube has graduations indicating the insertion depth starting from the middle of the first limiting part; the connecting seat includes a box body, a box cover, and a partition; a second limiting part is provided on the bottom surface of the box body; the height of the second limiting part is equal to the diameter of the guide tube; the second limiting parts are spaced apart. The second limiting part is located at the connection between two adjacent sides of the box body; the partition is installed inside the box body; the partition abuts against the top surface of the second limiting part; one end of the partition has a first mounting groove; the other end of the partition has a first clearance groove; the box cover is installed at the upper end of the box body; the bottom surface of the box cover abuts against the top surface of the partition; the box cover has a second clearance groove; the box cover is fixedly connected to the box body; the first mounting groove is used to place the liquid storage bladder; the box cover is used to fix the liquid storage bladder; fixing complete. The upper end of the reservoir abuts against the second relief groove; the upper surface of the reservoir and the upper surface of the box cover are on the same plane; the reservoir is made of a medical material that can be quickly sealed after puncture; one end of the reservoir is provided with a second connecting part; the second connecting part is a tubular structure; the second connecting part communicates with the inner cavity of the reservoir; one end of the box is provided with a first connecting part; the first connecting part is a curved structure; the guiding puncture needle includes a needle tube and a needle core; the needle core is inserted into the needle tube; the needle tube is provided with a scale indicating the insertion depth.

[0006] Preferably, the bottom surface of the box body is provided with a second limiting structure; the second limiting structures are spaced apart; the second limiting structures are arranged in a wave shape; a threaded hole is provided at the center of curvature of the bend of the second limiting structure; a first through hole is provided on the partition; the first through hole corresponds one-to-one with the threaded hole; a first limiting member is provided on the four side walls of the partition; the first limiting member is fixedly connected to the partition; and a limiting groove is provided on each of the four sides of the box body.

[0007] Preferably, the end of the first metal sheet is provided with a third limiting structure; the third limiting structure is straight at higher temperatures; the third limiting structure is a zigzag shape bent towards one side of the guide axis at lower temperatures.

[0008] Preferably, the insertion needle includes a puncture needle tip and a connecting tube; the puncture needle tip is disposed at one end of the connecting tube; the puncture needle tip is fixedly connected to the connecting tube; the puncture needle tip communicates with the connecting tube; the other end of the connecting tube is provided with a third connecting part; the third connecting part is used to connect a syringe and a measuring cup; the end of the connecting tube near the puncture needle tip is provided with a bifurcated tube; the bifurcated tube communicates with the connecting tube; the bifurcated tube is used to connect a pressure gauge; the end of the connecting tube near the third connecting part is provided with a speed regulating mechanism; the speed regulating mechanism is used to adjust the flow rate of the liquid in the connecting tube; the bifurcated tube is also provided with the speed regulating mechanism.

[0009] Preferably, a second through hole is provided on the side of the end of the puncture needle; the second through holes are evenly spaced.

[0010] Preferably, the partition has a first extrusion part at one end of the first clearance groove; the upper end of the first extrusion part has a first extrusion surface; the lid has a second extrusion part at one end; the lower end of the second extrusion part has a second extrusion surface; both the first extrusion surface and the second extrusion surface are arc-shaped.

[0011] Preferably, the upper end of the liquid storage bladder is provided with an arc-shaped protrusion; the arc-shaped protrusion is provided along the edge of the liquid storage bladder.

[0012] The beneficial effects of this invention are as follows:

[0013] 1. In this invention, after the No. 1 limiting part enters the cerebrospinal fluid, the temperature of the cerebrospinal fluid raises the temperature of the No. 1 limiting part, thereby causing the No. 1 limiting structure to become an arched curved shape, which in turn causes the sidewall of the No. 1 limiting part to arch, thus preventing the catheter in the subarachnoid space from moving out of the subarachnoid space. At the same time, it causes the catheter reserved below the septum to move outward, thereby compensating for the developmental needs through the reserved catheter. When it is necessary to remove the catheter, low-temperature physiological saline is slowly injected into the catheter through the reservoir, and the physiological saline is kept in the catheter, thereby reducing the temperature of the catheter, thereby reducing the temperature of the No. 1 metal plate, thereby causing the No. 1 limiting structure to become straight, thereby causing the No. 1 limiting part to contract, thus facilitating the outward extraction of the catheter.

[0014] 2. In this invention, when reserving space for the conduit, the conduit is laid along the second limiting structure between the two second limiting structures, so that the conduit abuts against the side of the positioning rod (one end of which is threadedly connected to the threaded hole). Then, the partition is installed, and the positioning rod passes through the first through hole. The partition moves along the positioning rod towards the bottom of the box. When the partition abuts against the second limiting part, the first limiting part abuts against the limiting groove, thus temporarily fixing the partition to the box. The positioning rod is then removed, at which point the bottom surface of the partition contacts the upper side of the conduit. The conduit is then limited by the partition and the second limiting structure. This ensures that the shape of the conduit remains unchanged during the processes of connecting the conduit to the second connecting part and installing the reservoir after the partition is installed, thus preventing damage due to pulling during subsequent operations. The catheter under the septum is bent excessively, thus reducing the chance of catheter blockage. A positioning rod restricts the catheter's position, ensuring its shape remains unchanged during septum installation and preventing excessive bending due to pulling, further reducing blockage. A second limiting structure allows the catheter near the first connection point to slide out between the two second limiting structures as the patient grows, while the remaining catheters remain between them. This second limiting structure continues to limit the catheter's position during later use, stabilizing it during patient movement and preventing excessive bending, thus reducing the chance of blockage.

[0015] 3. In this invention, before the catheter is removed, when the first limiting structure becomes straight, the third limiting structure deforms towards the catheter axis, thereby squeezing the inner wall of the catheter together at that point. At this time, the catheter at that point will prevent saline from flowing into the subarachnoid space, increasing the resistance to pushing the syringe. The syringe is pushed at regular intervals, and when more force is needed, it indicates that the first limiting part has completed contraction and the catheter can be removed. This allows the catheter to be removed as soon as possible, thereby reducing the amount of injected low-temperature saline and thus reducing the impact of saline on the cerebrospinal fluid pressure.

[0016] 4. In this invention, when cerebrospinal fluid (CSF) needs to be extracted or administered, the puncture needle is inserted into the reservoir, and the syringe is connected to the No. 3 connector. The pressure on the connector is adjusted by the speed control mechanism on the connector (the speed control mechanism is a flow regulator used on hospital infusion tubing), thereby adjusting the flow rate of the liquid in the connector and thus the flow rate of the CSF or medication, thereby reducing the impact of CSF extraction or medication injection on the CSF and thus reducing the impact on the patient. When it is necessary to measure the CSF pressure, the connector is disconnected by the speed control mechanism on the connector, and the pressure gauge is connected to the bifurcation tube. Then, the bifurcation tube is reconnected by the speed control mechanism on the bifurcation tube, allowing CSF to enter the bifurcation tube for pressure measurement. Before changing the syringe or measuring cup, the connector is disconnected by the speed control mechanism on the connector to prevent CSF from flowing out continuously.

[0017] 5. In this invention, the insertion depth of the puncture needle cannot be precisely controlled. After the tip of the puncture needle pierces the bottom of the reservoir, it will cause blockage of the puncture needle, which will hinder the flow of cerebrospinal fluid or drugs. By setting a second through hole on the side, cerebrospinal fluid or drugs can flow through the second through hole, thereby reducing the probability of blockage of cerebrospinal fluid or drugs. Attached Figure Description

[0018] The invention will now be further described with reference to the accompanying drawings.

[0019] Figure 1 This is a schematic diagram of the overall structure of the drainage and drug delivery device in this invention;

[0020] Figure 2 yes Figure 1 A magnified view of a section at point A in the middle;

[0021] Figure 3 This is a schematic diagram of the internal structure of the connector in this invention;

[0022] Figure 4 yes Figure 3 A magnified view of a section at point B in the middle;

[0023] Figure 5 yes Figure 3 A magnified view of a section at point C;

[0024] Figure 6 yes Figure 3 A magnified view of a section at point D;

[0025] Figure 7 This is a schematic diagram of the insertion needle in this invention;

[0026] Figure 8 yes Figure 7 A magnified view of a section at point E in the middle;

[0027] Figure 9 This is a schematic diagram of the structure of the box and partition in this invention;

[0028] Figure 10 yes Figure 9 A magnified view of a section at point F in the middle;

[0029] Figure 11 This is a schematic diagram of the box structure in this invention;

[0030] Figure 12 This is a schematic diagram of the threaded hole structure in this invention;

[0031] Figure 13 This is a schematic diagram of the partition structure in this invention;

[0032] Figure 14 This is a schematic diagram of the liquid storage bladder in this invention;

[0033] Figure 15 This is a schematic diagram of the structure of the box lid in this invention;

[0034] Figure 16 This is a schematic diagram of the first metal sheet in the high-temperature phase of this invention;

[0035] Figure 17 This is a schematic diagram of the first metal sheet in the low-temperature phase of this invention;

[0036] In the diagram: Connector 1, Box 11, Second Limiting Part 111, First Connecting Part 112, Second Limiting Structure 113, Threaded Hole 114, Box Cover 12, Second Clearance Groove 121, Second Extrusion Part 122, Second Extrusion Surface 123, Partition 13, First Mounting Groove 131, First Clearance Groove 132, First Through Hole 133, First Limiting Part 134, First Extrusion Part 135, First Extrusion Surface 136, Liquid Storage Bag 2, Second Connecting Part 21, Arc-shaped Protrusion 22, Guide Tube 3, Insertion End 31, First Round Hole 311, First Limiting Part 32, First Metal Sheet 33, First Limiting Structure 331, Third Limiting Structure 332, Insertion Needle 5, Puncture Needle 51, Second Through Hole 511, Connecting Tube 52, Third Connecting Part 521, Branching Tube 53, Speed ​​Adjustment Mechanism 54. Detailed Implementation

[0037] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0038] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 7 , Figure 9 , Figure 11 , Figure 13 , Figure 14 , Figure 15 and Figure 16 As shown, a lumbar cistern drainage and drug delivery device includes a connecting seat 1, a reservoir 2, a catheter 3, a guiding puncture needle, and an insertion needle 5; one end of the catheter 3 is provided with an insertion end 31; the end of the insertion end 31 is provided with an arc structure; the insertion end 31 is provided with a first limiting part 32; a first metal plate 33 is provided on the side wall of the first limiting part 32; the first metal plates 33 are evenly spaced along the circumference of the catheter 3; the first metal plates 33 are cast together with the raw material of the catheter 3; the first metal plates 33 are made of a two-way metal shape memory alloy; a first limiting structure 331 is provided in the middle of the first metal plate 33; the first... The limiting structure 331 becomes a straight shape at low temperatures; the first limiting structure 331 becomes an arched curved shape at high temperatures; a first circular hole 311 is provided on the side wall of the insertion end 31; the first circular holes 311 are evenly spaced; the guide tube 3 has a scale indicating the insertion depth starting from the middle part of the first limiting part 32; the connecting seat 1 includes a box body 11, a box cover 12, and a partition 13; a second limiting part 111 is provided on the bottom surface of the box body 11; the height of the second limiting part 111 is equal to the diameter of the guide tube 3; the second limiting parts 111 are spaced apart; the second limiting parts 111 are located on the... The box body 11 is connected to two adjacent sides; the box body 11 is provided with a partition 13; the partition 13 abuts against the top surface of the second limiting part 111; one end of the partition 13 is provided with a first mounting groove 131; the other end of the partition 13 is provided with a first clearance groove 132; the box body 11 is provided with a box cover 12 at the upper end; the bottom surface of the box cover 12 abuts against the top surface of the partition 13; the box cover 12 is provided with a second clearance groove 121; the box cover 12 is fixedly connected to the box body 11; the first mounting groove 131 is used to place the liquid storage bladder 2; the box cover 12 is used to fix the liquid storage bladder 2. After fixation, the upper end of the reservoir 2 abuts against the second relief groove 121; the upper surface of the reservoir 2 and the upper surface of the box cover 12 are on the same plane; the reservoir 2 is made of medical material that can be quickly sealed after puncture; one end of the reservoir 2 is provided with a second connecting part 21; the second connecting part 21 is a tubular structure; the second connecting part 21 communicates with the inner cavity of the reservoir 2; one end of the box body 11 is provided with a first connecting part 112; the first connecting part 112 is a curved structure; the guiding puncture needle includes a needle tube and a needle core; the needle core is inserted into the needle tube; the needle tube is provided with a scale indicating the insertion depth.

[0039] During the procedure, medical staff, while the patient is under anesthesia, insert the guiding needle into the predetermined puncture site in the lumbar region. The needle is inserted a certain distance into the subarachnoid space before insertion is stopped (the stylet is removed; whether cerebrospinal fluid flows out of the needle tube indicates successful insertion into the subarachnoid space. The distance between the arachnoid membrane and the skin can also be determined beforehand through medical examination to ensure the insertion depth exceeds the measured distance). The stylet is then removed, and the insertion end 31 of catheter 3 is inserted into the needle tube (the insertion end 31 of catheter 3 is pre-soaked in low-temperature saline to lower its temperature, thereby lowering the temperature of the first metal plate 33, and ultimately reducing its temperature below the low-temperature phase temperature). The limiting structure 331 becomes a straight shape. At this time, the first limiting part 32 contracts and becomes a tubular structure with a diameter equal to or slightly smaller than that of other parts of the catheter 3. The insertion depth of the catheter 3 is determined according to the scale on the catheter 3 and the length of the guiding puncture needle. When the scale on the catheter 3 is greater than the length of the guiding puncture needle, the insertion of the catheter 3 is stopped. Then, the catheter 3 is kept still, and the needle is pulled outward. The tissue then wraps around the catheter 3. The catheter 3 is then passed through the first connecting part 112, and the box 11 is connected to the subcutaneous pouch. After leaving a certain length of the catheter 3 in the box 11, the partition 13 is installed in the box 11, so that the catheter 3 bends upward through the first relief groove 132. The excess catheter 3 is cut off, and the catheter is inserted into the box. The tube 3 is inserted into the second connecting part 21. Then, the reservoir 2 (made of the same material as the medical ommaya sac, capable of self-sealing after puncture) is placed in the first installation slot 131. The box cover 12 is then fixed to the box body 11, thus completing the fixation of the box body 11, reservoir 2, and box cover 12. The sac is then sutured, completing the implantation of the reservoir 2 and catheter 3. The cerebrospinal fluid itself has pressure, causing it to enter the catheter 3 through the first round hole 311, and then through the catheter 3 into the reservoir 2. When extracting or draining the cerebrospinal fluid, the puncture needle 5 is inserted into the reservoir 2, and the cerebrospinal fluid is directly extracted from the reservoir 2. When administering cerebrospinal fluid, the needle is inserted directly into the reservoir 2. By injecting medication into the reservoir 2, the medication can be injected into the cerebrospinal fluid through the reservoir 2 and the catheter 3, thereby avoiding multiple lumbar punctures during treatment, reducing patient pain, and saving medical costs. By inserting the needle 5 into the reservoir 2 through the skin surface, the cerebrospinal fluid can be extracted, drained, and medication can be administered, thus facilitating patient treatment. After the first limiting part 32 enters the cerebrospinal fluid, the temperature of the cerebrospinal fluid raises the temperature of the first limiting part 32, which in turn raises the temperature of the first metal plate 33, making the temperature of the first metal plate 33 higher than the high-temperature phase temperature, thus causing the first limiting structure 331 to become an arched curved shape, and thus causing the side wall of the first limiting part 32 to arch.The patient's body develops rapidly, and some diseases require long-term monitoring of cerebrospinal fluid and medication administration. However, as the patient grows, the distance between the subarachnoid space and the connecting seat 1 increases, requiring a longer catheter 3. Generally, a certain length of catheter 3 is left in the subarachnoid space during puncture. During growth, the catheter 3 can move outward to compensate for the growth. Because the patient's subarachnoid space is relatively small, leaving too long a catheter increases the chance of rejection. If the length of the catheter 3 is too short, it is insufficient to meet the growth needs and may detach from the subarachnoid space, requiring re-puncture. During lumbar puncture, the first limiting part 32 of the catheter 3 can abut against the inner wall of the subarachnoid space, thereby preventing the catheter 3 in the subarachnoid space from moving out of the subarachnoid space. At the same time, it allows the catheter 3 reserved below the septum 13 to move outward, thereby compensating for the developmental needs through the reserved catheter 3. When it is necessary to remove the catheter 3, low-temperature physiological saline is slowly injected into the catheter 3 through the reservoir 2, and the physiological saline is kept in the catheter 3, thereby reducing the temperature of the catheter 3, thereby reducing the temperature of the first metal plate 33, thereby making the first limiting structure 331 straight, thereby causing the first limiting part 32 to contract, thereby facilitating the outward withdrawal of the catheter 3.

[0040] like Figure 3 , Figure 5 , Figure 9 , Figure 10 , Figure 11 , Figure 12 and Figure 13 As shown, the bottom surface of the box body 11 is provided with a second limiting structure 113; the second limiting structures 113 are spaced apart; the second limiting structures 113 are arranged in a wave shape; a threaded hole 114 is provided at the curvature center of the bend of the second limiting structure 113; a first through hole 133 is provided on the partition plate 13; the first through hole 133 corresponds one-to-one with the threaded hole 114; a first limiting member 134 is provided on the four side walls of the partition plate 13; the first limiting member 134 is fixedly connected to the partition plate 13; and a limiting groove is provided on each of the four sides of the box body 11.

[0041] When reserving space for the conduit 3, the conduit 3 is laid along the second limiting structure 113 between the two second limiting structures 113, so that the conduit 3 abuts against the side of the positioning rod (one end of which is threaded to the threaded hole). Then, the partition 13 is installed, and the positioning rod passes through the first through hole 133. The partition 13 moves along the positioning rod towards the bottom of the box 11. When the partition 13 abuts against the second limiting part 111, the first limiting part 134 abuts against the limiting groove, thereby temporarily fixing the partition 13 to the box 11. Then, the positioning rod is removed. At this time, the bottom surface of the partition 13 contacts the upper side of the conduit 3, thereby limiting the conduit 3 through the partition 13 and the second limiting structure 113. After the partition 13 is installed, the conduit 3 is connected to the second connecting part 21 and the liquid storage bladder 2 are installed, so that the shape of the conduit 3 remains unchanged, thereby avoiding damage during subsequent operations. Pulling causes excessive bending of the catheter 3 on the lower side of the partition 13, thereby reducing the chance of catheter 3 becoming blocked. By setting a positioning rod, the position of the catheter 3 is restricted, thus keeping the shape of the catheter 3 unchanged during the installation of the partition 13, thereby avoiding excessive bending of the catheter 3 due to pulling during the installation of the partition 13, and thus reducing the chance of catheter 3 becoming blocked. By setting a second limiting structure 113, as the patient's body develops, the catheter 3 on the side closer to the first connecting part 112 is pulled, thereby causing the catheter 3 at that point to slide out between the two second limiting structures 113, while the remaining catheters 3 remain between the two second limiting structures 113. During the later use of the catheter 3, the second limiting structure 113 still limits the catheter 3, thereby keeping the catheter 3 stable when the patient moves, thereby preventing the catheter 3 from being excessively bent when the patient moves, and thus reducing the chance of catheter 3 becoming blocked.

[0042] like Figure 3 , Figure 6 and Figure 17 As shown, the end of the first metal sheet 33 is provided with a third limiting structure 332; the third limiting structure 332 is straight when the temperature is high; the third limiting structure 332 is a zigzag shape that bends towards one side of the axis of the conduit 3 when the temperature is low.

[0043] Before the catheter 3 is removed, when the first limiting structure 331 becomes straight, the third limiting structure 332 deforms towards the axis of the catheter 3, thereby squeezing the inner wall of the catheter 3 together. At this time, the catheter 3 will prevent the flow of saline into the subarachnoid space, increasing the resistance to pushing the syringe. Pushing the syringe at regular intervals, when it is necessary to increase the force, it indicates that the first limiting part 32 has completed contraction and the catheter 3 can be removed. Thus, the catheter 3 is removed as soon as possible, thereby reducing the amount of injected low-temperature saline and reducing the impact of saline on the cerebrospinal fluid pressure.

[0044] like Figure 1 and 7As shown, the puncture needle 5 includes a puncture needle head 51 and a connecting tube 52; the puncture needle head 51 is disposed at one end of the connecting tube 52; the puncture needle head 51 is fixedly connected to the connecting tube 52; the puncture needle head 51 communicates with the connecting tube 52; the other end of the connecting tube 52 is provided with a third connecting part 521; the third connecting part 521 is used to connect a syringe and a measuring cup; a branch tube 53 is provided at one end of the connecting tube 52 near the puncture needle head 51; the branch tube 53 communicates with the connecting tube 52; the branch tube 53 is used to connect a pressure gauge; a speed regulating mechanism 54 is provided at one end of the connecting tube 52 near the third connecting part 521; the speed regulating mechanism 54 is used to adjust the flow rate of the liquid in the connecting tube 52; the speed regulating mechanism 54 is also provided on the branch tube 53.

[0045] When cerebrospinal fluid (CSF) needs to be extracted or administered, the puncture needle 51 is inserted into the reservoir 2, and the syringe is connected to the third connector 521. The pressure on the connecting tube 52 is adjusted by the speed regulating mechanism 54 (the speed regulating mechanism 54 is a flow regulator used on hospital infusion tubing), thereby adjusting the flow rate of the liquid in the connecting tube 52, and thus adjusting the flow rate of CSF or medication, thereby reducing the impact of CSF extraction or medication injection on CSF and thus reducing the impact on the patient. When CSF pressure needs to be measured, the connecting tube 52 is disconnected by the speed regulating mechanism 54, and the pressure gauge is connected to the bifurcation tube 53. Then, the bifurcation tube 53 is reconnected by the speed regulating mechanism 54 on the bifurcation tube 53, allowing CSF to enter the bifurcation tube 53 for pressure measurement. Before changing the syringe or measuring cup, the connecting tube 52 is disconnected by the speed regulating mechanism 54 to prevent CSF from flowing out continuously.

[0046] like Figure 7 and 8 As shown, a second through hole 511 is provided on the side of the end of the puncture needle 51; the second through holes 511 are evenly spaced.

[0047] The insertion depth of the puncture needle 51 cannot be precisely controlled. After the tip of the puncture needle 51 pierces the bottom of the reservoir 2, it will cause the puncture needle 51 to become blocked, which will hinder the flow of cerebrospinal fluid or drugs. By setting a second through hole 511 on the side, cerebrospinal fluid or drugs can flow through the second through hole 511, thereby reducing the chance of cerebrospinal fluid or drugs becoming blocked.

[0048] like Figure 3 , Figure 4 , Figure 13 and 15As shown, the partition 13 has a first extrusion part 135 at one end of the first clearance groove 132; the upper end of the first extrusion part 135 has a first extrusion surface 136; the box cover 12 has a second extrusion part 122 at one end; the lower end of the second extrusion part 122 has a second extrusion surface 123; both the first extrusion surface 136 and the second extrusion surface 123 are arc-shaped.

[0049] After the lid 12 and the body 11 are fixed, the conduit 3 outside the second connecting part 21 is squeezed by the first squeezing surface 136 and the second squeezing surface 123, thereby increasing the sealing between the conduit 3 and the second connecting part 21, and thus reducing the chance of cerebrospinal fluid leakage.

[0050] like Figure 3 , Figure 4 and 14 As shown, the upper end of the liquid storage bladder 2 is provided with an arc-shaped protrusion 22; the arc-shaped protrusion 22 is arranged along the edge of the liquid storage bladder 2.

[0051] When using the puncture needle 5 to puncture the reservoir 2, touch the reservoir 2 with your hand to determine the position of the arc-shaped protrusion 22, and then insert the puncture needle 5 into the area of ​​the arc-shaped protrusion 22. This reduces the chance of puncturing the lid 12 or outside the area of ​​the lid 12, thereby increasing the chance of successful puncture on the first attempt and making it easier to insert the puncture needle 5.

[0052] During the procedure, under the patient's anesthesia, medical staff insert a guiding needle into the predetermined puncture site in the lumbar region. The needle is inserted a certain distance into the subarachnoid space, and then insertion is stopped. The needle core is then removed, and the insertion end 31 of catheter 3 is inserted into the needle tube. The insertion depth of catheter 3 is determined based on the markings on catheter 3 and the length of the guiding needle. When the markings on catheter 3 exceed the length of the guiding needle, insertion of catheter 3 is stopped. Catheter 3 is then held still, and the needle tube is pulled outwards, allowing tissue to envelop catheter 3. Catheter 3 is then passed through the first connecting part 112, and the housing 11 is connected to the subcutaneous pouch. After reserving a certain length of catheter 3 within the housing 11, a partition 13 is installed inside the housing 11, allowing catheter 3 to pass through the first clearance groove 132. Bend upwards, cut off the excess catheter 3, insert catheter 3 into the second connecting part 21, then place the reservoir 2 into the first mounting slot 131, and then fix the box cover 12 onto the box body 11, thus completing the fixation of the box body 11, reservoir 2, and box cover 12. Then suture the bag, thus completing the embedding of the reservoir 2 and catheter 3. The cerebrospinal fluid itself has pressure, causing it to enter the catheter 3 through the first round hole 311, and then enter the reservoir 2 through the catheter 3. When extracting or draining cerebrospinal fluid, insert the insertion needle 5 into the reservoir 2, and directly extract the cerebrospinal fluid from the reservoir 2. When administering medication to the cerebrospinal fluid, directly inject the medication into the reservoir 2; the medication can then be injected into the cerebrospinal fluid through the reservoir 2 and catheter 3. To avoid multiple lumbar punctures during treatment, thus reducing patient suffering and saving medical costs, cerebrospinal fluid can be extracted, drained, and administered via a needle 5 inserted through the skin into the reservoir 2, facilitating patient treatment. After the first limiting part 32 enters the cerebrospinal fluid, the temperature of the cerebrospinal fluid raises the temperature of the first limiting part 32, which in turn raises the temperature of the first metal plate 33, making it higher than the high-temperature phase temperature. This causes the first limiting structure 331 to become an arched curve, and the sidewalls of the first limiting part 32 to arch. Patients grow rapidly, and some diseases require long-term monitoring and medication of cerebrospinal fluid. However, as patients grow, the subarachnoid space to the connecting seat 1... The distance between them will increase, requiring a longer catheter 3. Generally, a certain length of catheter 3 is left in the subarachnoid space during puncture. During body development, the catheter 3 in the subarachnoid space can move outward to compensate for the growth needs. Since the patient's subarachnoid space is relatively small, leaving too long a catheter will increase the chance of rejection. If the length of the catheter 3 is too short, it will not be enough to meet the growth needs and the catheter 3 may easily detach from the subarachnoid space, requiring another lumbar puncture. The first limiting part 32 of this catheter 3 can abut against the inner wall of the subarachnoid space, thereby preventing the catheter 3 in the subarachnoid space from moving outward. At the same time, it allows the catheter 3 left below the septum 13 to move outward, thereby compensating for the growth needs through the left catheter 3.When catheter 3 needs to be removed, low-temperature saline solution is slowly injected into catheter 3 through reservoir 2, and the saline solution is kept inside catheter 3. This lowers the temperature of catheter 3, which in turn lowers the temperature of metal plate 33, causing limiting structure 331 to straighten, and limiting part 32 to contract, thus facilitating the withdrawal of catheter 3.

[0053] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A device for draining and administering medication through the lumbar fossa, characterized in that: Includes a connector (1), a reservoir (2), a catheter (3), a guide puncture needle, and an insertion needle (5); one end of the catheter (3) is provided with an insertion end (31); the end of the insertion end (31) is provided with an arc structure; the insertion end (31) is provided with a first limiting part (32); a first metal plate (33) is provided on the side wall of the first limiting part (32); the first metal plates (33) are evenly spaced along the circumference of the catheter (3); the first metal plates (33) are cast together with the raw material of the catheter (3); the first metal plates (33) are made of a two-way metal shape memory alloy; a first limiting structure (331) is provided in the middle of the first metal plate (33); the first limiting structure (331) is regulated by temperature... When the temperature is below the low-temperature phase transition temperature, it becomes a straight shape; when the temperature is above the high-temperature phase transition temperature, the first limiting structure (331) becomes an arched curved shape; the side wall of the insertion end (31) is provided with a first circular hole (311); the first circular holes (311) are evenly spaced; the guide tube (3) is provided with a scale indicating the insertion depth starting from the middle part of the first limiting part (32); the connecting seat (1) includes a box body (11), a box cover (12) and a partition (13); the bottom surface of the box body (11) is provided with a second limiting part (111); the height of the second limiting part (111) is equal to the diameter of the guide tube (3); the second limiting parts (111) are spaced apart; the second limiting parts (111) are located on the... The box body (11) is connected to two adjacent sides; the box body (11) is provided with a partition (13); the partition (13) abuts against the top surface of the second limiting part (111); one end of the partition (13) is provided with a first mounting groove (131); the other end of the partition (13) is provided with a first clearance groove (132); the box body (11) is provided with a box cover (12); the bottom surface of the box cover (12) abuts against the top surface of the partition (13); the box cover (12) is provided with a second clearance groove (121); the box cover (12) is fixedly connected to the box body (11); the first mounting groove (131) is used to place the liquid storage bladder (2); the box cover (12) is used to cover the liquid storage bladder. (2) Fixation is performed; after fixation, the upper end of the reservoir (2) abuts against the second relief groove (121); the upper end face of the reservoir (2) and the upper end face of the box cover (12) are on the same plane; the reservoir (2) is made of medical material that can be quickly sealed after puncture; one end of the reservoir (2) is provided with a second connecting part (21); the second connecting part (21) is a tubular structure; the second connecting part (21) communicates with the inner cavity of the reservoir (2); one end of the box body (11) is provided with a first connecting part (112); the first connecting part (112) is a curved structure; the guiding puncture needle includes a needle tube and a needle core; the needle core is inserted into the needle tube; the needle tube is provided with a scale indicating the insertion depth.

2. The lumbar sac drainage and drug delivery device according to claim 1, characterized in that: The bottom surface of the box (11) is provided with a second limiting structure (113); the second limiting structures (113) are spaced apart; the second limiting structures (113) are arranged in a wave shape; a threaded hole (114) is provided at the curvature center of the bend of the second limiting structure (113); a first through hole (133) is provided on the partition (13); the first through hole (133) corresponds one-to-one with the threaded hole (114); a first limiting member (134) is provided on the four side walls of the partition (13); the first limiting member (134) is fixedly connected to the partition (13); a limiting groove is provided on each of the four sides of the box (11).

3. The lumbar sac drainage and drug delivery device according to claim 2, characterized in that: The end of the first metal sheet (33) is provided with a third limiting structure (332); the third limiting structure (332) is straight when the temperature is higher than the high temperature phase change temperature; the third limiting structure (332) is bent into a zigzag shape towards the axis of the conduit (3) when the temperature is lower than the low temperature phase change temperature.

4. The lumbar sac drainage and drug delivery device according to claim 3, characterized in that: The insertion needle (5) includes a puncture needle (51) and a connecting tube (52); one end of the connecting tube (52) is provided with the puncture needle (51); the puncture needle (51) is fixedly connected to the connecting tube (52); the puncture needle (51) communicates with the connecting tube (52); the other end of the connecting tube (52) is provided with a third connecting part (521); the third connecting part (521) is used to connect a syringe and a measuring cup; the connecting tube (52) A bifurcated tube (53) is provided at one end near the puncture needle (51); the bifurcated tube (53) is connected to the connecting tube (52); the bifurcated tube (53) is used to connect a pressure gauge; a speed regulating mechanism (54) is provided at one end of the connecting tube (52) near the third connecting part (521); the speed regulating mechanism (54) is used to adjust the flow rate of the liquid in the connecting tube (52); the speed regulating mechanism (54) is also provided on the bifurcated tube (53).

5. The lumbar sac drainage and drug delivery device according to claim 4, characterized in that: The puncture needle (51) has a second through hole (511) on its side; the second through holes (511) are evenly spaced.

6. The lumbar sac drainage and drug delivery device according to claim 5, characterized in that: The partition (13) has a first extrusion part (135) at one end of the first clearance groove (132); the first extrusion part (135) has a first extrusion surface (136) at its upper end; the box cover (12) has a second extrusion part (122) at one end; the second extrusion part (122) has a second extrusion surface (123) at its lower end; both the first extrusion surface (136) and the second extrusion surface (123) are arc-shaped.

7. The lumbar sac drainage and drug delivery device according to claim 6, characterized in that: The upper end of the reservoir (2) is provided with an arc-shaped protrusion (22); the arc-shaped protrusion (22) is provided along the edge of the reservoir (2).

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