CN108523937B - cerebrospinal fluid extractor - Google Patents
cerebrospinal fluid extractor Download PDFInfo
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- CN108523937B CN108523937B CN201810517376.8A CN201810517376A CN108523937B CN 108523937 B CN108523937 B CN 108523937B CN 201810517376 A CN201810517376 A CN 201810517376A CN 108523937 B CN108523937 B CN 108523937B
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/0045—Devices for taking samples of body liquids
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B10/00—Other methods or instruments for diagnosis, e.g. instruments for taking a cell sample, for biopsy, for vaccination diagnosis; Sex determination; Ovulation-period determination; Throat striking implements
- A61B10/0045—Devices for taking samples of body liquids
- A61B2010/0077—Cerebrospinal fluid
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- Measuring And Recording Apparatus For Diagnosis (AREA)
- External Artificial Organs (AREA)
Abstract
The invention relates to the technical field of medical appliances, in particular to a cerebrospinal fluid extractor, which comprises a sampling tube, a tube plug and a connecting tube, wherein one end of the sampling tube is airtight, the other end of the sampling tube is provided with an opening, the tube plug is arranged at one end of the sampling tube, which is provided with the opening, the upper surface of the tube plug is provided with an inserting opening, one end of the connecting tube is provided with a tube plug puncture needle, the other end of the connecting tube is provided with a lumbar puncture needle connecting piece, the tube plug puncture needle is inserted into the tube plug through the inserting opening to be connected with the inside of the sampling tube, the lumbar puncture needle connecting piece is connected with the tail part of the lumbar puncture needle, a tube cap is sleeved at one end of the sampling tube, which is provided with the opening, the sampling tube is airtight, the upper half part of the sampling tube is provided with a fixed ring, and the tube cap is connected with the fixed ring through the fixed ring. The invention has the advantages of simple structure, low production cost and reduced risk of pollution of sampling.
Description
Technical Field
The invention relates to the technical field of medical appliances, in particular to a cerebrospinal fluid extractor.
Background
The cerebrospinal fluid is colorless and transparent and fills the ventricles, subarachnoid space and central spinal canal. Cerebrospinal fluid is produced by the choroid plexus in the ventricle, and is slightly viscous, similar in nature to plasma and lymph. Cerebrospinal fluid belongs to extracellular fluid. The normal cerebrospinal fluid has certain chemical composition and pressure, and plays an important role in maintaining the relative stability of craniocerebral pressure. In the case of central nervous system diseases, lumbar puncture and aspiration of cerebrospinal fluid are often performed to assist diagnosis. At present, a sterile test tube is often sleeved at the tail of a puncture needle when cerebrospinal fluid is collected, and the cerebrospinal fluid is easy to pollute in the collecting process.
Disclosure of Invention
Aiming at the defects and shortcomings of the prior art, the invention discloses a cerebrospinal fluid extractor.
The technical scheme used for solving the technical problems is as follows: the cerebrospinal fluid extractor comprises a sampling tube, a tube plug, a connecting tube and a tube cap, wherein one end of the sampling tube is airtight, the other end of the sampling tube is provided with an opening, the tube plug is arranged at one end of the sampling tube, an inserting opening is formed in the upper surface of the tube plug, a tube plug puncture needle is arranged at one end of the connecting tube, a lumbar puncture needle connecting piece is arranged at the other end of the connecting tube, the tube plug puncture needle passes through the inserting opening to penetrate into the tube plug and is connected with the inside of the sampling tube, the lumbar puncture needle connecting piece is connected with the tail part of the lumbar puncture needle, the tube cap is sleeved at one end of the sampling tube, the opening is formed in the sampling tube, the sealing is achieved, a fixing ring is arranged at the upper half part of the sampling tube, and the tube cap is connected with the fixing ring through a fixing belt.
Preferably, the pipe plug is further provided with an air outlet hole, and the air outlet hole penetrates through the pipe plug and is communicated with the inside of the pipe plug.
Preferably, the sampling tube is a negative pressure sampling tube, and the inside of the sampling tube is set to be negative pressure.
Preferably, the connecting pipe is further provided with a constant current device, the constant current device comprises a first connecting end, a current limiter and a second connecting end, the current limiter is arranged at one end, close to the tube plug puncture needle, in the cavity of the second connecting end, and the first connecting end is in sealing connection with the second connecting end.
Preferably, the first connecting end is connected with one end of a connecting pipe close to the tail of the lumbar puncture needle, the second connecting end is connected with one end close to the tube plug puncture needle, the outer wall of the first connecting end is provided with external threads, the inner wall of the second connecting end is provided with internal threads, the first connecting end is connected with the second connecting end through threads, grooves are respectively formed in positions corresponding to contact surfaces between the first connecting end and the second connecting end, sealing rings are arranged in the groove spaces, the first connecting end faces towards one end of the second connecting end, a shunt tube is further arranged at one end of the shunt tube, an opening of one end of the shunt tube is communicated with the first connecting end, the other end of the shunt tube is sealed, and a flow dividing hole penetrating through the side wall is formed in the side wall of the shunt tube.
Preferably, a flow limiting hole is arranged at the upper middle part of the flow restrictor.
Preferably, the connecting pipe is further provided with a flow regulator, the flow regulator comprises a rolling groove which is obliquely arranged, and a roller is arranged in the rolling groove.
Preferably, the pipe plug comprises a pipe orifice sealing element, an inner sleeve and a leakage-proof sealing element, wherein the pipe orifice sealing element is an annular ring and comprises an outer lip edge and an inner lip edge, the outer lip edge and the inner lip edge are connected into a U shape, the opening of the U shape is sleeved on the upper edge of the pipe orifice of the sampling pipe, one side, which is tightly attached to the pipe wall of the sampling pipe, of the outer lip edge and the inner lip edge is provided with a plurality of sealing rings, one side, which faces the inside of the sampling pipe, of the inner sleeve is provided with a round of boss, the inner sleeve is of a cylindrical structure, internal vacuum is inserted into the upper end of the sampling pipe and the upper edge of the pipe orifice of the sampling pipe are leveled, the upper end and the lower end of the inner sleeve are respectively provided with an inserting port, the leakage-proof sealing element is clamped between the inner sleeve and the boss, and the leakage-proof sealing element can allow a pipe plug puncture needle to be inserted and penetrated, and is self-sealed after being extracted.
Preferably, the anti-leakage sealing member is a cylindrical cavity with an opening at the upper end, the edge of the opening at the upper end of the anti-leakage sealing member extends horizontally outwards to form a circle of flange matched with the boss, the flange at the upper part of the anti-leakage sealing member is propped against the boss, the outer wall of the inner sleeve is tightly clung to the inner lip, the bottom end of the inner sleeve is tightly contacted with the flange, a unidirectional sealing device is arranged on the lower bottom surface of the anti-leakage sealing member, the anti-leakage sealing member comprises a limiting ring and a plurality of baffle plates, the limiting ring is arranged at the edge of the lower part of the inner wall of the cavity of the anti-leakage sealing member, the baffle plates are fan-shaped rubber plates, one longer arc-shaped side of the baffle plates is fixedly connected with the bottom wall of the cavity of the anti-leakage sealing member, and each baffle plate is sequentially stacked and sealed around the central axis of the cavity of the anti-leakage sealing member, and the limiting ring is tightly clung to the upper part of the baffle plates, so that the baffle plates cannot be opened to the side provided with the inner sleeve.
Preferably, scale marks are arranged on the tube wall of the sampling tube, an inward inclined annular protruding block is arranged on the upper portion of the inner wall of the sampling tube, and the protruding block is funnel-shaped.
Compared with the prior art, the invention has the beneficial effects that:
1. the sampling tube is of a closed structure, the tube plug puncture needle at one end of the connecting tube is connected with the inside of the sampling tube, the lumbar puncture needle connecting piece at the other end of the connecting tube is connected with the tail outlet of the lumbar puncture needle, the cerebrospinal fluid is prevented from contacting the outside in the collecting process, the possibility of pollution is reduced, after the collecting is finished, the connecting tube is pulled out, the tube cap is sleeved at the opening at the upper end of the sampling tube for sealing, the cerebrospinal fluid is prevented from being polluted, the tube cap is connected with the fixing ring arranged at the upper half part of the sampling tube through the fixing belt, and the use is convenient, and the tube cap can be prevented from falling.
2. The invention is provided with the sampling tube, the sampling tube is a negative pressure sampling tube, the sampling tube is sealed by the tube plug, the inside of the sampling tube is set to be negative pressure, when the sampling tube is used, the negative pressure in the sampling tube and the pressure in the body are utilized to form pressure difference, and cerebrospinal fluid can be directly sucked into the sampling tube through the connecting tube.
3. According to the invention, the constant flow device is arranged on the connecting pipe, so that the speed of cerebrospinal fluid flowing into the connecting pipe is constant and convenient to control, and the risk caused by too fast intracranial pressure reduction is avoided.
4. The connecting pipe is provided with the flow regulator, so that the flow can be regulated, and the outflow speed, the start and the stop of cerebrospinal fluid can be further controlled.
5. The pipe plug comprises a pipe orifice sealing element, an inner sleeve and a leakage-proof sealing element, wherein the pipe orifice sealing element and a U-shaped structure are provided with a plurality of sealing rings between the pipe orifice sealing element and the pipe orifice wall, so that the sealing effect is ensured, the inner sleeve is tightly contacted with the pipe orifice sealing element, the inside of the inner sleeve is of a vacuum structure, the sealing effect is further enhanced, the bottom of the leakage-proof sealing element is also provided with a one-way sealing device, the cerebrospinal fluid is prevented from flowing back, and the sealing effect is further improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
FIG. 1 is a diagram of a cerebrospinal fluid extractor according to a first embodiment of the invention;
FIG. 2 is a diagram of a cerebrospinal fluid extractor according to a second embodiment of the invention;
FIG. 3 is a block diagram of a galvanostat provided by an embodiment of the invention;
FIG. 4 is a block diagram of a flow controller according to an embodiment of the present invention;
FIG. 5 is a block diagram of a pipe plug provided by an embodiment of the present invention;
FIG. 6 is a block diagram of a unidirectional sealing device provided by an embodiment of the present invention;
FIG. 1. Sampling tube; 2. a pipe plug; 3. a connecting pipe; 4. an insertion port; 5. a tube plug puncture needle; 6. lumbar puncture needle connecting piece; 7. a galvanostat; 8. a flow regulator; 9. scale marks; 10. an air outlet hole; 11. a tube cap; 12. a fixing ring; 13. a fixing belt; 14. a bump; 2-1, a pipe orifice sealing member; 2-2, an inner sleeve; 2-3, a leakage-proof sealing piece; 2-4, a one-way sealing device; 2-11. Outer lip; 2-12, inner lip edges; 2-13, sealing rings; 2-14, a boss; 2-31. Flanges; 2-41, limiting rings; 2-42, a baffle; 2-1, a pipe orifice sealing member; 2-2, an inner sleeve; 2-3, a leakage-proof sealing piece; 2-4, a one-way sealing device; 7-1, a first connecting end; 7-2, a flow restrictor; 7-3, a second connecting end; 7-4, sealing rings; 7-5, a shunt tube; 7-6, a diversion hole; 7-7, restricting holes; 8-1, rolling grooves; 8-2, rolling wheels.
Detailed Description
The invention will be further described with reference to the accompanying drawings.
Example 1
As shown in fig. 1, the cerebrospinal fluid extractor comprises a sampling tube 1, a tube plug 2, a connecting tube 3 and a tube cap 10, wherein one end of the sampling tube 1 is airtight, the other end of the sampling tube is provided with an opening, the tube plug 2 is arranged at one end of the sampling tube 1, which is provided with an opening 4 on the upper surface of the tube plug 2, one end of the connecting tube 3 is provided with a tube plug puncture needle 5, the other end of the connecting tube is provided with a lumbar puncture needle connecting piece 6, the tube plug puncture needle 5 penetrates through the insertion opening 4 to be inserted into the tube plug 2 and is connected with the inside of the sampling tube 1, the lumbar puncture needle connecting piece 6 is connected with the tail of the lumbar puncture needle, the tube cap 11 is sleeved at one end of the sampling tube 1, which is provided with an opening, is airtight, the upper part of the sampling tube 1 is provided with a fixing ring 12, and the tube cap 11 is connected with the fixing ring 12 through a fixing belt 13.
In this embodiment, sampling tube 1 is airtight structure, be connected with its inside through the stopcock pjncture needle 5 that connecting tube 3 one end set up, the lumbar puncture needle connecting piece 6 of the other end of connecting tube 3 links to each other with lumbar puncture needle afterbody export, stopcock pjncture needle 5 and lumbar puncture needle are hollow structure, the needle point all is equipped with the drill way with needle tail end, lumbar puncture needle connecting piece 6 is the rubber external member, can wrap up the cover and establish on the liquid outlet of the afterbody of lumbar puncture needle, ensured that cerebrospinal fluid can not contact with the external world in the gathering process, reduce the possibility of polluting, after gathering, pull out connecting tube 3, establish cap 11 cover in sampling tube 1 upper end opening part, seal, prevent that cerebrospinal fluid from receiving the pollution, cap 11 is connected with the solid fixed ring 12 that sets up in sampling tube 1 upper half through fixed band 13, convenient to use, also can prevent cap 11 from dropping.
In this embodiment, as shown in fig. 1, the plug 2 is further provided with an air outlet hole 10, and the air outlet hole 10 penetrates through the plug 2 to communicate with the inside thereof.
In this embodiment, the air outlet hole 10 is arranged to make the pressure in the sampling tube 1 consistent with the external environment, so as to ensure the smooth outflow of cerebrospinal fluid.
When the lumbar puncture needle is used, the lumbar puncture needle is inserted into a patient, one end of the connecting pipe 3 provided with the lumbar puncture needle connecting piece 6 is connected with the tail outlet of the lumbar puncture needle, the tube plug puncture needle 5 arranged at the other end of the connecting pipe 3 is utilized, the tube plug 2 is inserted through the inserting port 4 and communicated with the inside of the connecting pipe, cerebrospinal fluid can flow into the sampling tube 1 through the lumbar puncture needle, the connecting pipe 3 and the tube plug puncture needle 5, the pressure in the sampling tube 1 is consistent with the outside through the air outlet 10, and the smooth outflow of the cerebrospinal fluid is ensured.
Example two
As shown in fig. 2, in the present embodiment, the sampling tube 1 is a negative pressure sampling tube, and the inside thereof is set to a negative pressure.
In this embodiment, sampling tube 1 is the negative pressure sampling tube, and sampling tube 1 passes through tube plug 2 and seals, and inside is less than an atmospheric pressure, during the use, with tube plug pjncture needle 5 run through insert tube plug 2 in with sampling tube 1 internal connection to make lumbar vertebra pjncture needle, connecting pipe 3, tube plug pjncture needle 5 be linked together with sampling tube 1, utilize the negative pressure of sampling tube 1 inside and the pressure that has in the human body to form pressure differential, cerebrospinal fluid can be more smooth quick under the effect of pressure with inside the cerebrospinal fluid suction sampling tube 1 through the connecting pipe.
As shown in fig. 2 and 3, in this embodiment, the connecting tube 3 is further provided with a constant current device 7, the constant current device 7 includes a first connection end 7-1, a current limiter 7-2, and a second connection end 7-3, the current limiter 7-2 is disposed at one end, close to the tube plug puncture needle 5, in the cavity of the second connection end 7-3, and the first connection end 7-1 is in sealing connection with the second connection end 7-3.
As shown in fig. 3, in this embodiment, the first connection end 7-1 is connected with the lumbar puncture needle tail through the connection pipe 3, the second connection end 7-3 is connected with the plug puncture needle 5 through the connection pipe 3, an external thread is provided on the outer wall of the first connection end 7-1, an internal thread is provided on the inner wall of the second connection end 7-3, the first connection end 7-1 is connected with the second connection end 7-3 through threads, grooves are provided at positions corresponding to contact surfaces between the first connection end 7-1 and the second connection end 7-3, sealing rings 7-4 are provided in the groove spaces, one end of the first connection end 7-1 facing the second connection end 7-3 is further provided with a shunt tube 7-5, an opening at one end of the shunt tube 7-5 is communicated with the first connection end 7-1, the other end is sealed, and a side wall of the shunt tube 7-5 is provided with a flow dividing hole 7-6 penetrating through the side wall.
In this embodiment, as shown in fig. 3, a plurality of evenly distributed flow limiting holes 7-7 are provided at the middle position of the flow restrictor 7-2.
In the embodiment, the arrangement of the flow limiting hole 7-7 ensures that the speed of the cerebrospinal fluid flowing into the connecting pipe is constant and is convenient to control, the risk caused by too fast intracranial pressure reduction is avoided, the arrangement of the flow dividing hole 7-6 plays a role in slowing down the flow speed of the cerebrospinal fluid, and meanwhile, the cerebrospinal fluid can be prevented from directly impacting the flow limiting hole 7-7, so that the effect of the constant flow speed of the flow limiting hole 7-7 is reduced.
As shown in fig. 4, in this embodiment, the connection pipe 3 is further provided with a flow regulator 8, and the flow regulator 8 includes a rolling groove 8-1 disposed obliquely, and a roller 8-2 is disposed in the rolling groove.
In this embodiment, the flow regulator 8 is configured to regulate the flow of cerebrospinal fluid, and further control the outflow speed, start and stop of cerebrospinal fluid.
In this embodiment, as shown in fig. 5, the pipe plug 2 includes a pipe orifice sealing member 2-1, an inner sleeve 2-2 and a leakage-proof sealing member 2-3, the pipe orifice sealing member 2-1 is an annular ring and includes an outer lip 2-11 and an inner lip 2-12, the outer lip 2-11 is connected with the inner lip 2-12 to form a U shape, the U-shaped opening is sleeved on the upper edge of the pipe orifice of the sampling pipe 1, one side of the outer lip 2-11, which is tightly attached to the pipe wall of the sampling pipe 1, with the inner lip 2-12 is provided with a plurality of sealing rings 2-13, one side, which is towards the inside of the sampling pipe 1, of the inner sleeve 2-12 is provided with a ring boss 2-14, the inner sleeve 2-2 is in a cylindrical structure, the inner vacuum is inserted into the upper end of the sampling pipe 1 and the upper edge of the pipe orifice sealing member 2-1, the upper and lower ends of the inner sleeve 2-2 are respectively provided with the insertion openings 4, the leakage-proof sealing member 2-3 is clamped between the inner sleeve 2-14 and the boss 2-14, the leakage-proof sealing member 2-3 is allowed to be inserted into the pipe plug, and the leakage-proof sealing member is sealed after the pipe plug is inserted into the pipe plug 5.
In this embodiment, as shown in fig. 5, the leak-proof sealing member 2-3 is a cylindrical cavity with an open upper end, the edge of the open upper end of the leak-proof sealing member 2-3 extends horizontally outwards to form a circle of flange 2-31 matched with the boss 2-14, the flange 2-31 abuts against the boss 2-14, the outer wall of the inner sleeve 2-2 is tightly attached to the inner lip 2-12, the bottom end is tightly contacted with the flange 2-31, the lower bottom surface of the leak-proof sealing member 2-3 is provided with a unidirectional sealing device 2-4, and the leak-proof sealing member comprises a limiting ring 2-41 and a plurality of baffle plates 2-42, the limiting ring 2-41 is arranged at the edge position of the lower part of the inner wall of the cavity of the leak-proof sealing member 2-3, the baffle plates 2-42 are fan-shaped rubber plates, one longer arc-shaped side of each baffle plate 2-42 is fixedly connected with the inner wall of the cavity of the sealing member 2-3, the limiting ring 2-41 is sequentially arranged around the central axis of the cavity of the leak-proof sealing member 2-3, and the limiting ring 2-42 is arranged on one side of the baffle plates 2-42 in turn so that the sealing member 2-42 is not opened.
In the embodiment, the pipe orifice sealing element 2-1 is of a U-shaped structure, a plurality of sealing rings 2-13 are arranged between the pipe orifice sealing element and the inner wall and the outer wall of the pipe orifice, so that inner and outer multi-layer sealing is realized, the sealing effect of the pipe orifice is ensured, meanwhile, the inner sleeve 2-2 is tightly contacted with the inner lip edge 2-12, the inner part of the inner sleeve is of a vacuum structure, the pipe plug puncture needle 5 is further isolated when inserted, the sealing effect is enhanced, the anti-leakage sealing element 2-3 is clamped between the inner sleeve 2-2 and the boss 2-14, the integral sealing performance is ensured, the bottom of the anti-leakage sealing element 2-3 is further provided with a one-way sealing device 2-4, the cerebrospinal fluid is prevented from flowing outwards, and the sealing effect is further improved.
In this embodiment, as shown in fig. 2, graduation marks 9 are provided on the tube wall of the sampling tube 1, so as to detect the amount of cerebrospinal fluid taken from time to time.
As shown in fig. 2, in this embodiment, an inner inclined annular bump 14 is disposed on the upper portion of the inner wall of the sampling tube 1, and the bump 14 is funnel-shaped, so that on one hand, the collection of cerebrospinal fluid is facilitated, and on the other hand, when an accident occurs and results in the transverse arrangement of the test tube, the cerebrospinal fluid can be placed to leak and flow out, thereby avoiding secondary collection and increasing workload and pain of patients.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it intended to be exhaustive of all embodiments, but rather that obvious variations or modifications of the teachings remain within the scope of the invention.
Claims (4)
1. The cerebrospinal fluid extractor is characterized by comprising a sampling tube (1), a tube plug (2), a connecting tube (3) and a tube cap (11), wherein an opening is formed in one end of the sampling tube (1) in a sealing mode, the tube plug (2) is arranged at one end of the sampling tube (1) with the opening in a sealing mode, an inserting opening (4) is formed in the upper surface of the tube plug (2), a tube plug puncture needle (5) is arranged at one end of the connecting tube (3), a lumbar puncture needle connecting piece (6) is arranged at the other end of the connecting tube, the tube plug puncture needle (5) penetrates through the inserting opening (4) to be inserted into the tube plug (2) and is connected with the inside of the sampling tube (1), the lumbar puncture needle connecting piece (6) is connected with the tail of the lumbar puncture needle, the tube cap (11) is sleeved at one end of the sampling tube (1) with the opening, a fixing ring (12) is arranged on the upper half of the sampling tube (1) in a sealing mode, and the tube cap (11) is connected with the fixing ring (12) through a fixing belt (13);
the connecting pipe (3) is further provided with a constant current device (7), the constant current device (7) comprises a first connecting end (7-1), a current limiter (7-2) and a second connecting end (7-3), the current limiter (7-2) is arranged at one end, close to the pipe plug puncture needle (5), in a cavity of the second connecting end (7-3), and the first connecting end (7-1) is in sealing connection with the second connecting end (7-3);
the first connecting end (7-1) is connected with the tail part of the lumbar puncture needle through the connecting pipe (3), the second connecting end (7-3) is connected with the tube plug puncture needle (5) through the connecting pipe (3), an external thread is arranged on the outer wall of the first connecting end (7-1), an internal thread is arranged on the inner wall of the second connecting end (7-3), the first connecting end (7-1) is connected with the second connecting end (7-3) through threads, grooves are respectively arranged at positions corresponding to contact surfaces between the first connecting end (7-1) and the second connecting end (7-3), sealing rings (7-4) are arranged in groove spaces, one end of the first connecting end (7-1) facing the second connecting end (7-3) is also provided with a shunt tube (7-5), one end opening of the shunt tube (7-5) is communicated with the first connecting end (7-1), the other end is closed, and the side wall (7-5) of the shunt tube (7-5) is provided with a through hole (7-6) of the shunt tube;
a plurality of evenly distributed flow limiting holes (7-7) are formed in the middle of the flow restrictor (7-2);
the connecting pipe (3) is also provided with a flow regulator (8), the flow regulator (8) comprises a rolling groove (8-1) which is obliquely arranged, and a roller (8-2) is arranged in the rolling groove;
the pipe plug (2) comprises a pipe orifice sealing element (2-1), an inner sleeve (2-2) and a leakage-proof sealing element (2-3), wherein the pipe orifice sealing element (2-1) is an annular ring and comprises an outer lip edge (2-11) and an inner lip edge (2-12), the outer lip edge (2-11) is connected with the inner lip edge (2-12) to form a U shape, the U-shaped opening is sleeved on the upper edge of the pipe orifice of the sampling pipe (1), one side, close to the pipe wall of the sampling pipe (1), of the outer lip edge (2-11) and the inner lip edge (2-12) is provided with a plurality of sealing rings (2-13), one side, facing the inside of the sampling pipe (1), of the inner lip edge (2-12) is provided with a circle of boss (2-14), the inner sleeve (2-2) is of a cylindrical structure, the upper end of the sampling pipe (1) is inserted into the upper edge of the pipe orifice sealing element (2-1) to be flat, the upper end and the lower end of the inner sleeve (2-2) are respectively provided with an insertion port (4), and the leakage-proof boss (2-3) is fixedly clamped between the inner sleeve (2-2);
the anti-leakage sealing piece (2-3) is a cylindrical cavity with an opening at the upper end, the edge of the opening at the upper end of the anti-leakage sealing piece (2-3) horizontally extends outwards to form a circle of flanges (2-31) matched with the boss (2-14), the flanges (2-31) are propped against the boss (2-14), the outer wall of the inner sleeve (2-2) is tightly attached to the inner lip (2-12), the bottom end of the inner sleeve is tightly contacted with the flanges (2-31), the lower bottom surface of the anti-leakage sealing piece (2-3) is provided with a one-way sealing device (2-4), the anti-leakage sealing piece comprises a limiting ring (2-41) and a plurality of baffle pieces (2-42), the baffle pieces (2-42) are fan-shaped rubber pieces, the limiting ring (2-41) are arranged at the edge position of the lower part of the inner wall of the cavity of the anti-leakage sealing piece (2-3), one longer arc-shaped side of each baffle piece (2-42) is fixedly connected with the bottom wall of the cavity of the anti-leakage sealing piece (2-3), each baffle piece (2-42) is tightly attached to the central axis of the stacked part (2-42) around the limiting piece (2-42) in turn, so that the flap (2-42) cannot be opened to the side where the inner sleeve (2-2) is provided.
2. The cerebrospinal fluid extractor according to claim 1, wherein said tube plug (2) is further provided with an air outlet hole (10), said air outlet hole (10) communicating with the inside thereof through said tube plug (2).
3. Cerebrospinal fluid extractor according to claim 1, wherein said sampling tube (1) is a negative pressure sampling tube, the interior of which is provided with a negative pressure.
4. The cerebrospinal fluid extractor according to claim 1, wherein the tube wall of the sampling tube (1) is provided with graduation marks (9), the upper part of the inner wall of the sampling tube is provided with an inwardly inclined annular bump (14), and the bump (14) is funnel-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517376.8A CN108523937B (en) | 2018-05-25 | 2018-05-25 | cerebrospinal fluid extractor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517376.8A CN108523937B (en) | 2018-05-25 | 2018-05-25 | cerebrospinal fluid extractor |
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| CN108523937A CN108523937A (en) | 2018-09-14 |
| CN108523937B true CN108523937B (en) | 2023-09-19 |
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| CN201810517376.8A Active CN108523937B (en) | 2018-05-25 | 2018-05-25 | cerebrospinal fluid extractor |
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| CN109199460A (en) * | 2018-11-05 | 2019-01-15 | 庄秀丽 | A kind of Neurology clinic liquid taking device |
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