CN108523937A - Cerebrospinal fluid extraction device - Google Patents
Cerebrospinal fluid extraction device Download PDFInfo
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- CN108523937A CN108523937A CN201810517376.8A CN201810517376A CN108523937A CN 108523937 A CN108523937 A CN 108523937A CN 201810517376 A CN201810517376 A CN 201810517376A CN 108523937 A CN108523937 A CN 108523937A
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- pipe
- close
- sampling pipe
- cerebrospinal fluid
- puncture needle
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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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- Life Sciences & Earth Sciences (AREA)
- Molecular Biology (AREA)
- Surgery (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Medical Informatics (AREA)
- Hematology (AREA)
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- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Measuring And Recording Apparatus For Diagnosis (AREA)
- External Artificial Organs (AREA)
Abstract
The present invention relates to technical field of medical instrument, more particularly to a kind of cerebrospinal fluid extraction device, including sampling pipe, pipe close and connecting tube, described sampling pipe one end is closed, the other end is equipped with opening, the pipe close sealed set is equipped with one end of opening in the sampling pipe, the pipe close upper surface is equipped with insert port, one end of the connecting tube is provided with pipe close puncture needle, the other end is provided with lumbar puncture needle connector, the pipe close puncture needle is connect by the insert port in insertion pipe close and inside the sampling pipe, the lumbar puncture needle connector is connected with lumbar puncture Aculeata, the pipe cap is sheathed on one end that the sampling pipe is equipped with opening, the closed sampling pipe, the sampling pipe top half is equipped with fixed ring, the pipe cap is connected with the fixed ring by fixed band.The present invention have it is simple in structure, production cost is low, down-sample be contaminated danger advantage.
Description
Technical field
The present invention relates to technical field of medical instrument, and in particular to a kind of cerebrospinal fluid extraction device.
Background technology
Cerebrospinal fluid is the liquid of water white transparency, is filled in each ventricles of the brain, cavum subarachnoidale and myelocoele.Cerebrospinal fluid by
Choroid plexus in the ventricles of the brain generates, somewhat viscous similar to the property of blood plasma and lymph.Cerebrospinal fluid belongs to extracellular fluid.Normally
Cerebrospinal fluid has certain chemical composition and pressure, to maintaining the stabilization relatively of cranium pressure to play an important role.Suffer from central nervous system
When disease, it is often required to make lumbar puncture absorption examination of cerebrospinal fluid, to assist to diagnose.Nothing is often used when acquiring cerebrospinal fluid at present
Bacterium test tube is placed on puncture needle tail portion, in gatherer process or is easy pollution cerebrospinal fluid.
Invention content
In view of the drawbacks of the prior art and insufficient, the invention discloses a kind of cerebrospinal fluid extraction devices.
The present invention solves technical solution used in its technical problem：Cerebrospinal fluid extraction device, including sampling pipe, pipe close,
Connecting tube and pipe cap, described sampling pipe one end is closed, and the other end is equipped with opening, and the pipe close sealed set is set in the sampling pipe
There are one end of opening, the pipe close upper surface to be equipped with insert port, one end of the connecting tube is provided with pipe close puncture needle, the other end
It is provided with lumbar puncture needle connector, the pipe close puncture needle runs through in insertion pipe close by the insert port and the sampling pipe
Inside connection, the lumbar puncture needle connector are connected with lumbar puncture Aculeata, and the pipe cap is sheathed on the sampling pipe
One end equipped with opening, the closed sampling pipe, the sampling pipe top half are equipped with fixed ring, the pipe cap and the fixation
Ring is connected by fixed band.
Preferably, being additionally provided with venthole on the pipe close, the venthole is connected to through the pipe close with its inside.
Preferably, the sampling pipe be negative pressure sampling pipe, inside be set as negative pressure.
Preferably, be additionally provided with galvanostat in the connecting tube, the galvanostat include the first connecting pin, current limiter and
Second connection end, the current limiter are arranged in the cavity of the second connection end close to one end of the pipe close puncture needle, institute
The first connecting pin is stated to be tightly connected with the second connection end.
Preferably, first connecting pin is connected with connecting tube one end close to lumbar puncture Aculeata, described the
Two connecting pins are connected with close to one end of pipe close puncture needle, and first connecting pin outer wall is equipped with external screw thread, and described second connects
It connects end inner wall and is equipped with internal thread, first connecting pin is connected through a screw thread with the second connection end, first connecting pin
The corresponding position of contact surface between the second connection end is respectively set fluted, and sealing is equipped in recess space
Circle, one end of the first connecting pin towards the second connection end is additionally provided with isocon, the isocon one end open and institute
It states the first connecting pin to be connected, the other end is closed, and the side wall of the isocon is equipped with the tap hole through side wall.
Preferably, restricted orifice is arranged in medium position on the current limiter.
Preferably, being additionally provided with flow regulator in the connecting tube, the flow regulator includes being in tilted layout
Slot rolling, slot rolling is interior to be equipped with idler wheel.
Preferably, the pipe close includes bore seal, inner sleeve and anti-leak seal, the bore seal is ring
Shape circle includes outer lip and interior lip, and the outer lip is connected into U-shaped with the interior lip, its opening of U-shaped is sheathed on institute
Sampling pipe nozzle top edge is stated, if the side that the outer lip is close to the sampling tube wall with the interior lip is equipped with dry seal
Ring, the interior lip are equipped with a circle boss towards the side lower end in the sampling pipe, and the inner sleeve is tubular structure, internal
Vacuum, is inserted into that the sampling pipe upper end is equal with sampling pipe nozzle top edge, and the upper and lower ends of the inner sleeve are set respectively
There are insert port, the anti-leak seal to be fixed between inner sleeve and boss, the anti-leak seal allows pipe close to puncture
Needle insertion penetrates, and seal itself after extraction.
Preferably, the anti-leak seal is the circular cylindrical cavity of upper end opening, the anti-leak seal upper end opening
Edge is extended outward horizontally so as to form the flange that a circle and the boss match, the flange on the anti-leak seal top with
The boss is against the outer wall of the inner sleeve is close to the interior lip, and bottom end is in close contact with the flange, the leakproof
The bottom surface of sealing element is equipped with one-way sealing device, including, spacing ring and several catch, the spacing ring are arranged in the leakproof
The cavity inner wall lower edge position of sealing element, the catch are fan-shaped sheet rubber, the one side of the catch compared with long arc shape and institute
The cavity bottom wall for stating anti-leak seal is fixedly connected, each catch, around the anti-leak seal cavity central axes according to
The sealing of secondary stacked arrangement, the spacing ring are close to catch and are set to the catch top so that catch cannot be to being provided with inner sleeve
It opens the side of cylinder.
Preferably, being provided with graduation mark on the sampling tube wall, upper inside wall is equipped with interior oblique annular lug, institute
It is funnel-form to state convex block.
Compared with prior art, the beneficial effects of the invention are as follows：
1. the sampling pipe that the present invention is provided with is closed structure, pass through the internal phase of pipe close puncture needle and its of connecting tube one end
Connection is connected by the lumbar puncture needle connector of the connecting tube other end with the outlet of lumbar puncture Aculeata, it is ensured that acquiring
Cerebrospinal fluid will not be in contact with the external world in the process, reduce the possibility of pollution, after the completion of acquisition, connecting tube be extracted, by pipe cap
It is set at sampling pipe upper end opening, is sealed, cerebrospinal fluid is prevented to be contaminated, pipe cap is being sampled by fixed band with setting
The fixed ring of pipe top half is connected, and is easy to use, is fallen prevented also from pipe cap.
2. the present invention is provided with sampling pipe, the sampling pipe is negative pressure sampling pipe, and sampling pipe is sealed by pipe close, and inside is set
It is set to negative pressure, it, directly can be by connecting tube by brain in use, using its internal negative pressure and internal pressure initiation pressure difference
Spinal fluid sucks inside sampling pipe.
3. the present invention is provided with galvanostat in connecting tube so that constant airspeed of the csf flow into connecting tube is convenient for behaviour
Control also avoids intracranial pressure and reduces too fast to cause risk.
4. the present invention is provided with flow regulator in connecting tube, the size of regulating flow quantity further controls cerebrospinal fluid
The speed of outflow and beginning and stopping.
5. pipe close of the present invention includes bore seal, inner sleeve and anti-leak seal, bore seal and U-shaped structure, together
When and nozzle wall between be equipped with multiple sealing rings, ensure that sealing effect, while inner sleeve is in close contact with bore seal,
Inside is vacuum structure, further enhances sealing effect, anti-leak seal bottom is additionally provided with one-way sealing device, ensure that
Cerebrospinal fluid will not flow back, and further improve the effect of sealing.
Description of the drawings
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art are briefly described.
Fig. 1 is the cerebrospinal fluid extraction device structure chart that the embodiment of the present invention one provides；
Fig. 2 is cerebrospinal fluid extraction device structure chart provided by Embodiment 2 of the present invention；
Fig. 3 is the structure chart of galvanostat provided in an embodiment of the present invention；
Fig. 4 is the structure chart of flow controller provided in an embodiment of the present invention；
Fig. 5 is the structure chart of pipe close provided in an embodiment of the present invention；
Fig. 6 is the structure chart of one-way sealing device provided in an embodiment of the present invention；
1. sampling pipe in figure；2. pipe close；3. connecting tube；4. insert port；5. pipe close puncture needle；6. lumbar puncture needle connects
Part；7. galvanostat；8. flow regulator；9. graduation mark；10. venthole；11. pipe cap；12. fixed ring；13. fixing band；14. convex
Block；2-1. bore seal；2-2. inner sleeve；2-3. anti-leak seal；2-4. one-way sealing devices；2-11. outer lip；2-
Lip in 12.；2-13. sealing ring；2-14. boss；2-31. flange；2-41. spacing ring；2-42. catch；2-1. ferrule
Part；2-2. inner sleeve；2-3. anti-leak seal；2-4. one-way sealing devices；The first connecting pins 7-1.；7-2. current limiter；7-3.
Second connection end；7-4. sealing ring；7-5. isocon；7-6. tap hole；7-7. metering hole；8-1. slot rolling；8-2. idler wheel.
Specific implementation mode
The present invention is described further below in conjunction with attached drawing.
Embodiment one
As shown in Figure 1, cerebrospinal fluid extraction device, including sampling pipe 1, pipe close 2, connecting tube 3 and pipe cap 10, the sampling pipe 1
The closed other end in one end is equipped with opening, and 2 sealed set of the pipe close is equipped with one end of opening, the pipe close 2 in the sampling pipe 1
Upper surface is equipped with insert port 4, and one end of the connecting tube 3 is provided with pipe close puncture needle 5, and the other end is provided with lumbar puncture needle company
Fitting 6, the pipe close puncture needle 5 is connect in insertion pipe close 2 with 1 inside of the sampling pipe by the insert port 4, described
Lumbar puncture needle connector 6 is connected with lumbar puncture Aculeata, and the pipe cap 11 is sheathed on the sampling pipe 1 and is equipped with opening
One end, the closed sampling pipe 1,1 top of the sampling pipe are equipped with fixed ring 12, and the pipe cap 11 passes through with the fixed ring 12
Fixed band 13 is connected.
In the present embodiment, sampling pipe 1 is closed structure, in the pipe close puncture needle 5 and its by the setting of 3 one end of connecting tube
Portion is connected, and the lumbar puncture needle connector 6 of the other end of connecting tube 3 is connected with the outlet of lumbar puncture Aculeata, and pipe close punctures
Needle 5 is hollow structure with lumbar puncture needle, and needle point is equipped with aperture with backshank end, and lumbar puncture needle connector 6 is rubber
External member, on the liquid outlet that the tail portion for being set in lumbar puncture needle can be wrapped up, it is ensured that in gatherer process cerebrospinal fluid will not with it is outer
Boundary is in contact, and reduces the possibility of pollution, after the completion of acquisition, extracts connecting tube 3, pipe cap 11 is set in 1 upper end of sampling pipe
Opening is sealed, and cerebrospinal fluid is prevented to be contaminated, and pipe cap 11 is by fixed band 13 with setting in 1 top half of sampling pipe
Fixed ring 12 be connected, be easy to use, fallen prevented also from pipe cap 11.
As shown in Figure 1, in the present embodiment, venthole 10 is additionally provided on the pipe close 2, the venthole 10 is through described
Pipe close 2 is connected to its inside.
In the present embodiment, the setting of venthole 10 makes, the pressure in sampling pipe 1 is consistent with the external world, ensure that brain ridge
The smooth outflow of liquid.
In use, it is first that lumbar puncture needle is inserted into the patient, then connecting tube 3 is equipped with lumbar puncture needle connector 6
The outlet of one end and lumbar puncture Aculeata be connected, the pipe close puncture needle 5 for recycling 3 other end of connecting tube to be arranged passes through insertion
Mouth 4 is connected to through pipe close 2 is inserted into its inside, and cerebrospinal fluid can pass through lumbar puncture needle, connecting tube 3, the inflow of pipe close puncture needle 5
In sampling pipe 1, venthole 10 can make the pressure in sampling pipe 1 consistent with the external world, ensure that the smooth outflow of cerebrospinal fluid.
Embodiment two
As shown in Fig. 2, in the present embodiment, the sampling pipe 1 is negative pressure sampling pipe, inside be set as negative pressure.
In the present embodiment, sampling pipe 1 is negative pressure sampling pipe, and sampling pipe 1 is sealed by pipe close 2, and inside is big less than one
Air pressure, in use, pipe close puncture needle 5 is connect in insertion pipe close 2 with 1 inside of the sampling pipe, so that lumbar vertebrae is worn
Pricker, connecting tube 3, pipe close puncture needle 5 are connected with sampling pipe 1, using inside sampling pipe 1 negative pressure and human body in the pressure that has
Power forms pressure difference, and cerebrospinal fluid more smoothly can be sucked quickly by connecting tube sample under the effect of the pressure by cerebrospinal fluid
Inside pipe 1.
As shown in Figures 2 and 3, in the present embodiment, galvanostat 7, the galvanostat 7 are additionally provided in the connecting tube 3
Including the first connecting pin 7-1, current limiter 7-2 and second connection end 7-3, the current limiter 7-2 settings are in the second connection end
It is sealed close to one end of the pipe close puncture needle 5, the first connecting pin 7-1 and second connection end 7-3 in the cavity of 7-3
Connection.
As shown in figure 3, in the present embodiment, the first connecting pin 7-1 passes through the connecting tube 3 and the lumbar puncture
Aculeata is connected, and the second connection end 7-3 is connected by the connecting tube 3 with the pipe close puncture needle 5, and described first
Connecting pin 7-1 outer walls are equipped with external screw thread, and the second connection end 7-3 inner walls are equipped with internal thread, the first connecting pin 7-1 and institute
It states second connection end 7-3 to be connected through a screw thread, the contact surface between the first connecting pin 7-1 and the second connection end 7-3
Corresponding position is respectively set fluted, and sealing ring 7-4, the first connecting pin 7-1 are equipped in recess space towards institute
The one end for stating second connection end 7-3 is additionally provided with isocon 7-5, the isocon 7-5 one end opens and the first connecting pin 7-1
It is connected, the other end is closed, and the side wall of the isocon 7-5 is equipped with the tap hole 7-6 through side wall.
As shown in figure 3, in the present embodiment, the current limiter 7-2 medium positions are provided with several equally distributed current limlitings
Hole 7-7.
In the present embodiment, the setting of metering hole 7-7 makes constant airspeed of the csf flow into connecting tube convenient for manipulating,
Also avoid intracranial pressure reduce it is too fast cause risk, the setting of tap hole 7-6 to play the role of slowing down cerebrospinal fluid flow velocity, simultaneously
Cerebrospinal fluid can also be avoided directly to impact metering hole 7-7 so that the effect of the constant flow rate of metering hole 7-7 reduces.
As shown in figure 4, in the present embodiment, flow regulator 8, the flow-rate adjustment are additionally provided in the connecting tube 3
Device 8 includes the slot rolling 8-1 being in tilted layout, and idler wheel 8-2 is equipped in slot rolling.
In the present embodiment, the setting of flow regulator 8 so that the size of cerebrospinal fluid flow is adjustable, further controls
The speed of cerebrospinal fluid outflow and beginning and stopping.
As shown in figure 5, in the present embodiment, the pipe close 2 includes bore seal 2-1, inner sleeve 2-2 and leakproof seal
It includes outer lip 2-11 and interior lip 2-12 that part 2-3, the bore seal 2-1, which are annular ring, the outer lip 2-11 and institute
State interior lip 2-12 be connected be connected into U-shaped, 1 nozzle top edge of the sampling pipe, the outer lip 2-11 are sheathed at U-shaped opening
The side for being close to 1 tube wall of the sampling pipe with the interior lip 2-12 is equipped with several sealing ring 2-13, the interior lip 2-12 courts
It is tubular structure to be equipped with circle a boss 2-14, the inner sleeve 2-2 to the side lower end inside the sampling pipe 1, inner vacuum,
It is inserted into that 1 upper end of the sampling pipe is equal with the top edges the bore seal 2-1, the upper and lower ends difference of the inner sleeve 2-2
Equipped with the insert port 4, the anti-leak seal 2-3 is fixed between inner sleeve 2-2 and boss 2-14, the leakproof seal
Part 2-3 allows the insertion of pipe close puncture needle 5 to penetrate, and seal itself after extraction.
As shown in figure 5, in the present embodiment, the anti-leak seal 2-3 is the circular cylindrical cavity of upper end opening, it is described anti-
Leakage sealing element 2-3 upper end openings edge is extended outward horizontally so as to form the flange 2-31 that a circle matches with the boss 2-14, institute
The flange 2-31 and boss 2-14 is stated against the outer wall of the inner sleeve 2-2 is close to the interior lip 2-12, bottom end and institute
Flange 2-31 to be stated to be in close contact, the bottom surface of the anti-leak seal 2-3 is equipped with one-way sealing device 2-4, including, spacing ring 2-
41 and several catch 2-42, the spacing ring 2-41 are arranged in the cavity inner wall lower edge position of the anti-leak seal 2-3,
The catch 2-42 is fan-shaped sheet rubber, cavitys of the catch 2-42 compared with one side of long arc shape and the anti-leak seal 2-3
Inner wall is fixedly connected, each catch 2-42, and it is close to stack gradually arrangement around the central axes of the cavity of the anti-leak seal 2-3
Envelope, the spacing ring 2-41 are close to the catch 2-42 and are set to the tops the catch 2-42 so that the catch 2-42 cannot
It is opened to the side for being provided with the inner sleeve 2-2.
In the present embodiment, bore seal 2-1 is U-shaped structure, while multiple sealings are equipped between nozzle inside and outside wall
Ring 2-13, plays inside and outside multi-layer sealed, ensure that the sealing effect of nozzle, while inner sleeve 2-2 and interior lip 2-12 are close
Contact, internal is vacuum structure, accomplishes further to be isolated when pipe close puncture needle 5 can be made to be inserted into, strengthens sealing effect,
Anti-leak seal 2-3 is fixed ensure that whole leakproofness, anti-leak seal 2-3 between inner sleeve 2-2 and boss 2-14
Bottom is additionally provided with one-way sealing device 2-4, ensure that cerebrospinal fluid will not flow outwardly, further improves the effect of sealing
Fruit.
As shown in Fig. 2, in the present embodiment, graduation mark 9 is provided on the tube wall of the sampling pipe 1, can constantly detect
The amount of taking of cerebrospinal fluid.
As shown in Fig. 2, in the present embodiment, 1 upper inside wall of the sampling pipe is equipped with interior oblique annular lug 14, described convex
Block 14 is funnel-form, on the one hand this setting is convenient for the acquisition of cerebrospinal fluid can on the other hand when accident occurring causing test tube horizontal
It places cerebrospinal fluid and spills outflow, avoid secondary acquisition, increase the pain of workload and patient.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments, and the obvious variation or change that this extends out
The dynamic protection domain still in the invention.
Claims (10)
1. cerebrospinal fluid extraction device, which is characterized in that described including sampling pipe (1), pipe close (2), connecting tube (3) and pipe cap (10)
The closed other end in sampling pipe (1) one end is equipped with opening, and pipe close (2) sealed set is equipped with opening in the sampling pipe (1)
One end, pipe close (2) upper surface are equipped with insert port (4), and one end of the connecting tube (3) is provided with pipe close puncture needle (5), separately
One end is provided with lumbar puncture needle connector (6), and the pipe close puncture needle (5) is by the insert port (4) through insertion pipe close
(2) it is connect with the sampling pipe (1) inside in, the lumbar puncture needle connector (6) is connected with lumbar puncture Aculeata, institute
It states pipe cap (11) and is sheathed on one end that the sampling pipe (1) is equipped with opening, the closed sampling pipe (1), on the sampling pipe (1)
Half part is equipped with fixed ring (12), and the pipe cap (11) is connected with the fixed ring (12) by fixed band (13).
2. cerebrospinal fluid extraction device according to claim 1, which is characterized in that be additionally provided with venthole on the pipe close (2)
(10), the venthole (10) is connected to through the pipe close (2) with its inside.
3. cerebrospinal fluid extraction device according to claim 1, which is characterized in that the sampling pipe (1) is negative pressure sampling pipe,
Inside is set as negative pressure.
4. cerebrospinal fluid extraction device according to claim 1, which is characterized in that be additionally provided with constant current on the connecting tube (3)
Device (7), the galvanostat (7) include the first connecting pin (7-1), current limiter (7-2) and second connection end (7-3), the current limliting
One end of device (7-2) setting close pipe close puncture needle (5) in the cavity of the second connection end (7-3), described first
Connecting pin (7-1) is tightly connected with the second connection end (7-3).
5. cerebrospinal fluid extraction device according to claim 4, which is characterized in that first connecting pin (7-1) passes through described
Connecting tube (3) is connected with the lumbar puncture Aculeata, and the second connection end (7-3) passes through the connecting tube (3) and institute
It states pipe close puncture needle (5) to be connected, the first connecting pin (7-1) outer wall is equipped with external screw thread, and the second connection end (7-3) is interior
Wall is equipped with internal thread, and first connecting pin (7-1) is connected through a screw thread with the second connection end (7-3), and described first connects
Connect the corresponding position of the contact surface between end (7-1) and the second connection end (7-3) be respectively set it is fluted, in groove sky
In be equipped with sealing ring (7-4), one end of the first connecting pin (7-1) towards the second connection end (7-3) is additionally provided with point
Flow tube (7-5), isocon (7-5) one end open are connected with first connecting pin (7-1), and the other end is closed, described
The side wall of isocon (7-5) is equipped with the tap hole (7-6) through side wall.
6. cerebrospinal fluid extraction device according to claim 4, which is characterized in that current limiter (7-2) the medium position setting
There are several equally distributed metering holes (7-7).
7. cerebrospinal fluid extraction device according to claim 1, which is characterized in that be additionally provided with flow on the connecting tube (3)
Adjuster (8), the flow regulator (8) include the slot rolling (8-1) being in tilted layout, and idler wheel (8-2) is equipped in slot rolling.
8. cerebrospinal fluid extraction device according to claim 1, which is characterized in that the pipe close (2) includes bore seal (2-
1), inner sleeve (2-2) and anti-leak seal (2-3), the bore seal (2-1) be annular ring include outer lip (2-11) and
Interior lip (2-12), the outer lip (2-11) is connected with the interior lip (2-12) is connected into U-shaped, and institute is sheathed at U-shaped opening
Sampling pipe (1) nozzle top edge is stated, the outer lip (2-11) is close to the sampling pipe (1) tube wall with the interior lip (2-12)
Side be equipped with several sealing rings (2-13), the interior lip (2-12) sets towards the internal side lower end of the sampling pipe (1)
It is tubular structure to have a circle boss (2-14), the inner sleeve (2-2), is inserted into the sampling pipe (1) upper end and the nozzle is close
The top edge sealing (2-1) is equal, and the upper and lower ends of the inner sleeve (2-2) are respectively equipped with the insert port (4), and the leakproof is close
Sealing (2-3) is fixed between inner sleeve (2-2) and boss (2-14).
9. cerebrospinal fluid extraction device according to claim 8, which is characterized in that the anti-leak seal (2-3) is opened for upper end
The circular cylindrical cavity of mouth, anti-leak seal (2-3) upper end opening edge is extended outward horizontally so as to form a circle and the boss
The flange (2-31) that (2-14) matches, the flange (2-31) is with the boss (2-14) against the inner sleeve (2-2)
Outer wall is close to the interior lip (2-12), and bottom end is in close contact with the flange (2-31), the anti-leak seal (2-3)
Bottom surface is equipped with one-way sealing device (2-4), including spacing ring (2-41) and several catch (2-42), the catch (2-42) are
Fan-shaped sheet rubber, the spacing ring (2-41) are arranged in the cavity inner wall lower edge position of the anti-leak seal (2-3), institute
It states catch (2-42) to be fixedly connected with the cavity bottom wall of the anti-leak seal (2-3) compared with one side of long arc shape, each catch
(2-42) stacks gradually arrangement sealing, the spacing ring (2-41) around the central axes of the cavity of the anti-leak seal (2-3)
It is close to the catch (2-42) and is set to the top the catch (2-42) so that the catch (2-42) cannot be described to being provided with
It opens the side of inner sleeve (2-2).
10. cerebrospinal fluid extraction device according to claim 1, which is characterized in that be provided on the tube wall of the sampling pipe (1)
Graduation mark (9), upper inside wall are equipped with interior oblique annular lug (14), and the convex block (14) is funnel-form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810517376.8A CN108523937B (en) | 2018-05-25 | 2018-05-25 | cerebrospinal fluid extractor |
Applications Claiming Priority (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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| Publication Number | Publication Date |
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| CN108523937A true CN108523937A (en) | 2018-09-14 |
| CN108523937B 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109199460A (en) * | 2018-11-05 | 2019-01-15 | 庄秀丽 | A kind of Neurology clinic liquid taking device |
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| CN108523937B (en) | 2023-09-19 |
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