Cerebrospinal fluid sterile puncture sampling device

Abstract

The invention relates to the technical field of neurology medical instruments, and provides a cerebrospinal fluid sterile puncture sampling device which comprises a needle head, a puncture cylinder and a piston unit, the needle head is arranged at the puncture outlet end of the puncture cylinder, the piston unit is arranged in the puncture cylinder, and the piston unit comprises an extraction assembly and a dosing assembly. The extraction assembly is arranged in the puncture cylinder, and the dosing assembly is arranged in the extraction assembly; the puncture sampling device further comprises a sample storage unit, the sample storage unit is arranged at the drainage outlet end of the puncture cylinder, the extraction assembly is provided with a volume-variable extraction cavity, the extraction cavity is selectively communicated with the puncture outlet end or the drainage outlet end, the dosing assembly is provided with a volume-variable dosing cavity, and the dosing cavity is selectively communicated with the puncture outlet end. And at most one of the extraction cavity and the dosing cavity is communicated with the puncture outlet end. By means of the technical scheme, the problem that in the prior art, a cerebrospinal fluid detection tool has the risk of bacterial infection in the cerebrospinal fluid sample collection process is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of neurology medical instruments, and in particular to a cerebrospinal fluid aseptic puncture sampling device. Background Art

[0002] The results of cerebrospinal fluid examination are of great significance for the diagnosis of diseases, especially those of the central nervous system. It has high sensitivity and high specificity for the examination of bacterial meningitis, tuberculous meningitis and fungal meningitis, sensitivity and moderate specificity for the examination of viral meningitis, subarachnoid hemorrhage, multiple sclerosis, neurosyphilis, paraspinal abscess, etc., moderate sensitivity and high specificity for the examination of meningeal malignant tumors, and moderate sensitivity and moderate specificity for intracranial hemorrhage, viral encephalitis and subdural hematoma.

[0003] Cerebrospinal fluid samples are generally collected by lumbar puncture. If necessary, they can be obtained by puncturing the cerebellar medulla oblongata or the lateral ventricle. 5-15 ml is extracted at a time, generally about 10 ml, and strict aseptic operation is required. In the prior art, medical personnel should wash their hands, wear sterile gloves, and disinfect the collection site. At the same time, the collection tools also need to be sterilized with alcohol. However, the existing collection tools often need to transfer cerebrospinal fluid to a special sterile test tube after puncture, and need to be transferred as soon as possible for testing, but this process still has the risk of bacterial infection. Whether it is for cerebrospinal fluid samples or for patients, there are certain potential risks. Based on the above problems, a new device is needed to solve them. Summary of the invention

[0004] The present invention provides a cerebrospinal fluid aseptic puncture sampling device, which solves the problem of the risk of bacterial infection in the cerebrospinal fluid detection tool in the prior art during the cerebrospinal fluid sample collection process.

[0005] The technical solution of the present invention is as follows:

[0006] A cerebrospinal fluid aseptic puncture sampling device, the puncture sampling device comprising a needle, a puncture tube and a piston unit, the needle is arranged at the puncture outlet end of the puncture tube, the piston unit is arranged inside the puncture tube, wherein the piston unit comprises an extraction component and a drug administration component, the extraction component is arranged inside the puncture tube, and the drug administration component is arranged inside the extraction component;

[0007] The puncture sampling device also includes a sample storage unit, which is arranged at the discharge outlet end of the puncture tube. The extraction component has an extraction chamber with a variable volume, and the extraction chamber can be selectively connected to the puncture outlet end or the discharge outlet end. The medication component has a medication chamber with a variable volume, and the medication chamber can be selectively connected to the puncture outlet end. At most one of the extraction chamber and the medication chamber can be connected to the puncture outlet end.

[0008] The extraction assembly includes an extraction sleeve and an extraction piston, wherein the extraction sleeve is rotatably arranged in the puncture tube, the extraction piston is movably arranged in the extraction sleeve, a central through hole is arranged on the extraction piston, a clearance hole with the same diameter as the central through hole is arranged at the bottom of the extraction sleeve, the medication assembly is arranged in the central through hole and passes through the clearance hole to abut the bottom of the puncture tube, and after the extraction piston moves, it forms the extraction chamber with variable volume with the extraction sleeve and the medication assembly, and the bottom of the extraction sleeve is provided with an extraction hole and a drainage hole, and the rotation of the extraction sleeve can selectively connect the extraction hole with the puncture outlet end or the drainage hole with the drainage outlet end.

[0009] The dosing assembly includes a dosing sleeve and a dosing piston. The dosing sleeve can be rotatably arranged in the central through hole, and the dosing piston can be movably arranged in the dosing sleeve. A dosing hole is arranged on the dosing sleeve. The dosing sleeve can be rotated to selectively connect the dosing hole with the puncture outlet end. After the dosing piston moves, it forms the dosing cavity with the dosing sleeve.

[0010] The puncture sampling device also includes a liquid medicine unit. The puncture tube is provided with a drug inlet end. The drug administration sleeve is provided with a drug supplement hole. The drug administration sleeve can be rotated to selectively connect the drug supplement hole with the drug administration inlet end.

[0011] The puncture tube is provided with a first integrated channel, a second integrated channel and a third integrated channel, one end of the first integrated channel is used to connect with the puncture outlet end, and the other end is used to selectively connect with the extraction hole; one end of the second integrated channel is used to connect with the discharge outlet end, and the other end is used to selectively connect with the discharge hole; one end of the third integrated channel is used to connect with the medication inlet end, and the other end is used to selectively connect with the medicine tonic hole.

[0012] The needle is an indwelling needle, and the needle is detachably connected to the puncture outlet end.

[0013] The drug liquid unit is detachably connected to the drug administration inlet.

[0014] The working principle and beneficial effects of the present invention are:

[0015] The present invention discloses a sterile puncture sampling device for cerebrospinal fluid, which achieves sterile extraction of cerebrospinal fluid and timely and safe transfer to a sample storage unit by adjusting the connectivity between an extraction component and a medication component of the puncture sampling device. Meanwhile, bacterial infection of the patient can be avoided through the medication component, thereby achieving sterile puncture sampling of cerebrospinal fluid to a great extent, and timely, quickly and sterilely sealing the sample for detection. When the sampling device is working, the needle punctures to the designated position, and then the extraction component is adjusted to connect the extraction component with the puncture outlet end, the extraction cavity in the extraction component is expanded, and the cerebrospinal fluid enters the extraction cavity through the puncture outlet end from the needle, and then the extraction component is adjusted to connect the extraction component with the drainage outlet end, and at the same time, the extraction component is disconnected from the puncture outlet end, the extraction cavity is compressed, and the extracted cerebrospinal fluid is discharged to the sample storage unit through the drainage outlet end; when the cerebrospinal fluid is completely discharged from the extraction cavity, the drug administration component can be adjusted to connect the drug administration component with the puncture outlet end, and the drug can be administered to the patient through the drug administration cavity, the puncture outlet end and the needle to avoid bacterial infection. The above technical scheme can solve the problem of the risk of bacterial infection in the cerebrospinal fluid detection tool in the prior art during the collection of cerebrospinal fluid samples. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0017] Figure 1 It is a structural schematic diagram of the sampling device in the present invention;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the sampling device of the present invention;

[0019] Figure 3 This is a schematic diagram of the internal structure of the sampling device of the present invention in a connected state when extracting cerebrospinal fluid;

[0020] Figure 4 It is a schematic diagram of the internal structure of the sampling device of the present invention in a connected state when discharging cerebrospinal fluid;

[0021] Figure 5 This is a schematic diagram of the internal structure of the sampling device of the present invention in a connected state when administering medicine;

[0022] Figure 6 This is a schematic diagram of the internal structure of the sampling device of the present invention in a connected state when replenishing medicine;

[0023] In the figure: 1, needle, 2, puncture tube, 3, puncture outlet, 4, extraction component, 5, dosing component, 6, sample storage unit, 7, drainage outlet, 8, extraction chamber, 9, dosing chamber, 10, extraction sleeve, 11, extraction piston, 12, center through hole, 13, give way hole, 14, extraction hole, 15, drainage hole, 16, dosing sleeve, 17, dosing piston, 18, dosing hole, 19, liquid medicine unit, 20, dosing inlet, 21, medicine replenishing hole, 22, first integrated channel, 23, second integrated channel, 24, third integrated channel. DETAILED DESCRIPTION

[0024] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0025] like Figure 1 to Figure 6 As shown, this embodiment proposes a cerebrospinal fluid aseptic puncture sampling device, the puncture sampling device comprises a needle 1, a puncture tube 2 and a piston unit, the needle 1 is arranged at the puncture outlet end 3 of the puncture tube 2, the piston unit is arranged inside the puncture tube 2, wherein the piston unit comprises an extraction component 4 and a drug administration component 5, the extraction component 4 is arranged inside the puncture tube 2, and the drug administration component 5 is arranged inside the extraction component 4;

[0026] The puncture sampling device also includes a sample storage unit 6, which is arranged at the discharge outlet end 7 of the puncture tube 2. The extraction component 4 has a variable-volume extraction chamber 8, and the extraction chamber 8 can be selectively connected to the puncture outlet end 3 or the discharge outlet end 7. The medication component 5 has a variable-volume medication chamber 9, and the medication chamber 9 can be selectively connected to the puncture outlet end 3. At most one of the extraction chamber 8 and the medication chamber 9 can be connected to the puncture outlet end 3.

[0027] In this embodiment, when the disclosed sampling device is working, the needle 1 punctures to the designated position. For the specific puncture position, the operator can select a suitable position according to the actual operation, and perform sterilization and other aseptic treatments. After puncture, the extraction component 4 is adjusted to communicate with the puncture outlet end 3, and the extraction cavity 8 in the extraction component 4 is expanded. The cerebrospinal fluid enters the extraction cavity 8 from the needle 1 through the puncture outlet end 3, and then the extraction component 4 is adjusted to communicate with the drainage outlet end 7. At the same time, the extraction component 4 is disconnected from the puncture outlet end 3, and the extraction cavity 8 is compressed, and the extracted cerebrospinal fluid is discharged to the sample storage unit 6 through the drainage outlet end 7; when the cerebrospinal fluid is discharged from the extraction cavity 8, the drug administration component 5 can be adjusted to communicate with the puncture outlet end 3, and the drug administration can be given to the patient through the drug administration cavity 9, the puncture outlet end 3 and the needle 1 to avoid bacterial infection. It should be noted that at most one of the extraction component 4 and the drug administration component 5 is connected to the puncture outlet port 3, so as to realize their respective independent functions and further ensure safe operation.

[0028] The extraction assembly 4 includes an extraction sleeve 10 and an extraction piston 11, wherein the extraction sleeve 10 is rotatably arranged in the puncture tube 2, the extraction piston 11 is movably arranged in the extraction sleeve 10, a central through hole 12 is arranged on the extraction piston 11, and a clearance hole 13 with the same diameter as the central through hole 12 is arranged at the bottom of the extraction sleeve 10, the medication assembly 5 is arranged in the central through hole 12 and abuts against the bottom of the puncture tube 2 through the clearance hole 13, and the extraction piston 11 moves to form the variable volume extraction chamber 8 with the extraction sleeve 10 and the medication assembly 5, and the bottom of the extraction sleeve 10 is provided with an extraction hole 14 and a drainage hole 15, and the rotation of the extraction sleeve 10 can selectively connect the extraction hole 14 with the puncture outlet end 3 or the drainage hole 15 with the drainage outlet end 7.

[0029] On the basis of the above embodiment, the extraction component 4 selectively connects the puncture inlet end and the discharge outlet end 7. Specifically, the extraction component 4 is composed of an extraction sleeve 10 and an extraction piston 11, wherein the extraction sleeve 10 is arranged in the puncture tube 2, and the extraction sleeve 10 can be rotated, and the extraction piston 11 is movably arranged in the extraction sleeve 10. A central through hole 12 is arranged in the center of the extraction piston 11, and a clearance hole 13 is arranged in the center of one end of the extraction sleeve 10 close to the bottom of the puncture tube 2. The dosing component 5 is arranged in the central through hole 12 and passes through the clearance hole 13 to abut against the bottom of the puncture tube 2. An extraction hole 14 and a discharge hole 15 are arranged on the end surface of the extraction sleeve 10 close to the bottom of the puncture tube 2. The extraction hole 14 can be connected with the puncture outlet end 3 by rotating the extraction sleeve 10, and the discharge hole 15 can be opened. Disconnected from the drainage outlet end 7; or the extraction hole 14 is disconnected from the puncture outlet end 3, while the drainage hole 15 is connected to the drainage outlet end 7; a possible implementation method is to determine whether the rotation is in place by setting a marking line on the extraction sleeve 10 and the puncture tube 2; when the extraction hole 14 is connected to the puncture outlet end 3, and the drainage hole 15 is disconnected from the drainage outlet end 7, the extraction piston 11 moves, and the extraction piston 11, the extraction sleeve 10 and the dosing component 5 form an extraction chamber 8, the space of the extraction chamber 8 gradually increases, and cerebrospinal fluid is extracted; after the cerebrospinal fluid extraction is completed, the extraction sleeve 10 is rotated to disconnect the extraction hole 14 from the puncture outlet end 3, while the drainage hole 15 is connected to the drainage outlet end 7, the extraction piston 11 moves to compress the extraction chamber 8, and the cerebrospinal fluid is discharged to the sample storage unit 6 through the drainage hole 15 and the drainage outlet end 7.

[0030] The dosing assembly 5 includes a dosing sleeve 16 and a dosing piston 17. The dosing sleeve 16 can be rotatably arranged in the central through hole 12. The dosing piston 17 can be movably arranged in the dosing sleeve 16. A dosing hole 18 is arranged on the dosing sleeve 16. The dosing sleeve 16 can be rotated to selectively connect the dosing hole 18 with the puncture outlet end 3. After the dosing piston 17 moves, it forms the dosing cavity 9 with the dosing sleeve 16.

[0031] On the basis of the above embodiment, the drug delivery component 5 can be selectively connected to the puncture outlet end 3, and its structure is a drug delivery sleeve 16 and a drug delivery piston 17. The drug delivery sleeve 16 can also be rotated to adjust the position to change the connection state. The end surface of the drug delivery sleeve 16 close to one end of the puncture tube 2 is provided with a drug delivery hole 18. After the drug delivery sleeve 16 rotates, the drug delivery hole 18 can be connected to the puncture outlet end 3. The drug delivery piston 17 moves, and the drug delivery cavity 9 can be compressed to apply the drug solution to the patient through the drug delivery hole 18, the puncture outlet end 3 and the needle 1. It should be noted that judging whether the drug delivery sleeve 16 rotates in place after rotation is the same as the extraction sleeve 10, and both can be provided with a marking line. Exemplarily, a corresponding standard marking line is set on the puncture tube 2, corresponding to the port of the puncture outlet end 3 located on the inner side corresponding to the drug delivery sleeve 16, and an alignment marking line is set on the drug delivery sleeve 16, and the alignment marking line corresponds to the drug delivery hole 18. It can be rotated until the two marking lines are aligned. The alignment principle of other holes is the same. Of course, this is only a possible embodiment, and other methods can also be adopted.

[0032] The puncture sampling device further comprises a liquid medicine unit 19 , the puncture tube 2 is provided with a drug inlet 20 , the drug administration sleeve 16 is provided with a drug supplement hole 21 , and the drug administration sleeve 16 can selectively connect the drug supplement hole 21 with the drug administration inlet 20 by rotating.

[0033] On the basis of the above embodiment, a drug administration inlet end 20 is further provided on the puncture tube 2 for installing the drug liquid unit 19, and a drug supplement hole 21 is provided on the drug administration sleeve 16. When the drug administration sleeve 16 is rotated, the drug administration hole 18 is disconnected from the puncture outlet end 3, and the drug supplement hole 21 can be connected with the drug administration inlet end 20, and the drug administration piston 17 moves to expand the drug administration cavity 9. The drug liquid in the drug liquid unit 19 will enter the drug administration cavity 9 through the drug administration inlet end 20 and the drug supplement hole 21, thereby completing the addition of drug liquid.

[0034] The puncture tube 2 is provided with a first integrated channel 22, a second integrated channel 23 and a third integrated channel 24, one end of the first integrated channel 22 is used to connect with the puncture outlet end 3, and the other end is used to selectively connect with the extraction hole 14; one end of the second integrated channel 23 is used to connect with the discharge outlet end 7, and the other end is used to selectively connect with the discharge hole 15; one end of the third integrated channel 24 is used to connect with the medication inlet end 20, and the other end is used to selectively connect with the tonic hole 21.

[0035] On the basis of the above embodiment, the puncture tube 2 can be integrated with a first integrated channel 22, a second integrated channel 23 and a third integrated channel 24. The above three integrated channels are passages formed at the end of the puncture tube 2 to form a connection effect. The ports of the above integrated channels can be connected to each other to switch the connection state. The puncture outlet end 3 is arranged eccentrically at the end of the puncture tube 2, so as to facilitate the drug administration sleeve 16 to adjust the connection state.

[0036] The needle 1 is an indwelling needle, and the needle 1 is detachably connected to the puncture outlet end 3 .

[0037] The drug liquid unit 19 is detachably connected to the drug administration inlet 20 .

[0038] Based on the above embodiment, the needle 1 can adopt an indwelling needle type, and the needle 1 and the puncture outlet end 3 can be detachably connected so that the needle 1 can be used for other operations as a backup; the drug liquid unit 19 and the drug inlet end 20 can be detachably connected to facilitate the replacement of other drugs.

[0039] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A cerebrospinal fluid aseptic puncture sampling device, characterized in that: The puncture sampling device comprises a needle (1), a puncture tube (2) and a piston unit, wherein the needle (1) is arranged at a puncture outlet end (3) of the puncture tube (2), and the piston unit is arranged inside the puncture tube (2), wherein the piston unit comprises an extraction component (4) and a drug administration component (5), wherein the extraction component (4) is arranged inside the puncture tube (2), and the drug administration component (5) is arranged inside the extraction component (4); The puncture sampling device further comprises a sample storage unit (6), wherein the sample storage unit (6) is arranged at the liquid discharge outlet end (7) of the puncture tube (2); the extraction component (4) comprises an extraction chamber (8) with a variable volume, wherein the extraction chamber (8) can be selectively connected to the puncture outlet end (3) or the liquid discharge outlet end (7); the medication component (5) comprises a medication chamber (9) with a variable volume, wherein the medication chamber (9) can be selectively connected to the puncture outlet end (3); and at most one of the extraction chamber (8) and the medication chamber (9) can be selectively connected to the puncture outlet end (3).

2. The cerebrospinal fluid aseptic puncture sampling device according to claim 1, characterized in that: The extraction assembly (4) comprises an extraction sleeve (10) and an extraction piston (11), wherein the extraction sleeve (10) is rotatably arranged in the puncture tube (2), the extraction piston (11) is movably arranged in the extraction sleeve (10), a central through hole (12) is arranged on the extraction piston (11), a clearance hole (13) having the same diameter as the central through hole (12) is arranged at the bottom of the extraction sleeve (10), and the drug delivery assembly (5) is arranged in the central through hole (12) and The extraction piston (11) passes through the clearance hole (13) and abuts against the bottom of the puncture tube (2). After the extraction piston (11) moves, it forms the extraction chamber (8) with a variable volume together with the extraction sleeve (10) and the medication assembly (5). The bottom of the extraction sleeve (10) is provided with an extraction hole (14) and a drainage hole (15). The rotation of the extraction sleeve (10) can selectively connect the extraction hole (14) with the puncture outlet end (3) or the drainage hole (15) with the drainage outlet end (7).

3. The cerebrospinal fluid aseptic puncture sampling device according to claim 2, characterized in that: The dosing assembly (5) comprises a dosing sleeve (16) and a dosing piston (17). The dosing sleeve (16) is rotatably disposed in the central through hole (12). The dosing piston (17) is movably disposed in the dosing sleeve (16). A dosing hole (18) is disposed on the dosing sleeve (16). The dosing sleeve (16) can be rotated to selectively connect the dosing hole (18) with the puncture outlet end (3). After the dosing piston (17) moves, it forms the dosing cavity (9) with the dosing sleeve (16).

4. The cerebrospinal fluid aseptic puncture sampling device according to claim 3, characterized in that: The puncture sampling device also includes a drug liquid unit (19), the puncture tube (2) is provided with a drug inlet end (20), the drug administration sleeve (16) is provided with a drug supplement hole (21), and the drug administration sleeve (16) can be rotated to selectively connect the drug supplement hole (21) with the drug administration inlet end (20).

5. The cerebrospinal fluid aseptic puncture sampling device according to claim 4, characterized in that: The puncture tube (2) is provided with a first integrated channel (22), a second integrated channel (23) and a third integrated channel (24); one end of the first integrated channel (22) is used to connect with the puncture outlet (3), and the other end is used to selectively connect with the extraction hole (14); one end of the second integrated channel (23) is used to connect with the discharge outlet (7), and the other end is used to selectively connect with the discharge hole (15); one end of the third integrated channel (24) is used to connect with the drug administration inlet (20), and the other end is used to selectively connect with the drug supplement hole (21).

6. The cerebrospinal fluid aseptic puncture sampling device according to any one of claims 1 to 5, characterized in that: The needle (1) is an indwelling needle, and the needle (1) is detachably connected to the puncture outlet end (3).

7. The cerebrospinal fluid aseptic puncture sampling device according to claim 5, characterized in that: The drug liquid unit (19) is detachably connected to the drug administration inlet end (20).

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