CN115025556A - Filter core and artery hemostix thereof - Google Patents
Filter core and artery hemostix thereof Download PDFInfo
- Publication number
- CN115025556A CN115025556A CN202210477029.3A CN202210477029A CN115025556A CN 115025556 A CN115025556 A CN 115025556A CN 202210477029 A CN202210477029 A CN 202210477029A CN 115025556 A CN115025556 A CN 115025556A
- Authority
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- Prior art keywords
- section
- sealing plug
- filter element
- hydrophilic
- cylinder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 210000001367 artery Anatomy 0.000 title description 7
- 238000007789 sealing Methods 0.000 claims abstract description 40
- 239000002245 particle Substances 0.000 claims abstract description 36
- 239000008280 blood Substances 0.000 claims abstract description 35
- 210000004369 blood Anatomy 0.000 claims abstract description 35
- 229920003023 plastic Polymers 0.000 claims abstract description 15
- 239000004033 plastic Substances 0.000 claims abstract description 15
- 239000000843 powder Substances 0.000 claims abstract description 9
- 229920001971 elastomer Polymers 0.000 claims description 9
- 239000004699 Ultra-high molecular weight polyethylene Substances 0.000 claims description 8
- 239000000463 material Substances 0.000 claims description 8
- 229920000785 ultra high molecular weight polyethylene Polymers 0.000 claims description 8
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 6
- 239000000806 elastomer Substances 0.000 claims description 6
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 6
- 229920001903 high density polyethylene Polymers 0.000 claims description 5
- 239000004700 high-density polyethylene Substances 0.000 claims description 5
- 229920000056 polyoxyethylene ether Polymers 0.000 claims description 5
- 229940051841 polyoxyethylene ether Drugs 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 4
- 229920001495 poly(sodium acrylate) polymer Polymers 0.000 claims description 4
- NNMHYFLPFNGQFZ-UHFFFAOYSA-M sodium polyacrylate Chemical compound [Na+].[O-]C(=O)C=C NNMHYFLPFNGQFZ-UHFFFAOYSA-M 0.000 claims description 4
- 239000004593 Epoxy Substances 0.000 claims description 3
- 229920001730 Moisture cure polyurethane Polymers 0.000 claims description 3
- 229920002125 Sokalan® Polymers 0.000 claims description 3
- 239000004584 polyacrylic acid Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 230000035699 permeability Effects 0.000 abstract description 5
- 238000010521 absorption reaction Methods 0.000 abstract description 3
- 230000006872 improvement Effects 0.000 description 14
- 241001465754 Metazoa Species 0.000 description 2
- 210000004204 blood vessel Anatomy 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000338 in vitro Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- DNEHKUCSURWDGO-UHFFFAOYSA-N aluminum sodium Chemical compound [Na].[Al] DNEHKUCSURWDGO-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 238000002405 diagnostic procedure Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000565 sealant Substances 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150015—Source of blood
- A61B5/15003—Source of blood for venous or arterial blood
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/150007—Details
- A61B5/150755—Blood sample preparation for further analysis, e.g. by separating blood components or by mixing
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/15—Devices for taking samples of blood
- A61B5/153—Devices specially adapted for taking samples of venous or arterial blood, e.g. with syringes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0002—Casings; Housings; Frame constructions
- B01D46/0005—Mounting of filtering elements within casings, housings or frames
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0027—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
- B01D46/003—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions including coalescing means for the separation of liquid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/42—Auxiliary equipment or operation thereof
Abstract
The invention belongs to the technical field of medical instruments, and particularly relates to a filter element and an arterial hemostix thereof, wherein the filter element comprises a closed section and a water absorption section; the closed section is a cylinder made of expanded particles arranged in gaps of uniformly distributed plastic particles, and the hydrophilic section is a cylinder with an air-permeable gap sintered by hydrophilic powder; the arterial hemostix includes filter core, cylinder, setting at the syringe needle of cylinder one end, gliding sealing plug in the cylinder, drive the sealing plug and slide and stretch out the needle bar outside the cylinder, the filter core set up in on the sealing plug, the water permeability of hydrophilic section is good, is convenient for the arterial hemostix to be absorbed by the enclosed section in leading-in enclosed section with the moisture in the blood when taking a blood sample, makes the enclosed section big to the moisture absorbed quantity in the blood, the inflation of enclosed section is sealed effectually, is applicable to the arterial hemostix.
Description
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a filter element and an arterial hemostix manufactured by the same.
Background
The water-sealing filter element is a porous air-permeable filter material which is formed by adding a sealing agent into plastic powder, such as UHMW-PE (ultra-high molecular weight Polyethylene), HDPE (high density Polyethylene) and the like and sintering the plastic powder. The sealant is usually a high molecular elastomer, which does not swell in a dry state, and gas can pass through the filter element through the air holes. When water is met, the macromolecular elastomer expands to block the air holes, so that a solution (such as blood) with water is prevented from passing through the filter element, and meanwhile, outside air is prevented from passing through the air holes.
The arterial hemostix is mainly used for collecting and primarily preserving arterial blood samples for in-vitro diagnostic tests. The arterial hemostix usually includes the syringe needle, with the blood storage ware that the syringe needle is connected, blood storage ware keep away from the one end of syringe needle and seted up a through-hole, meet water and seal the filter core and set up in this through-hole. When a needle is used to puncture an artery of a human or an animal, arterial blood is flushed from the needle into the blood reservoir. Arterial blood gradually ascends, air in the blood reservoir is discharged outwards through the air holes of the water-meeting closed filter element, when the arterial blood ascends to the position of the water-meeting closed filter element, the air holes are blocked due to the expansion of the macromolecular elastomer in the water-meeting closed filter element, blood cannot pass through the air holes, and meanwhile, external air cannot pass through the air holes, namely, external gas molecules cannot exchange with gas molecules dissolved into the blood, so that the aim of collecting and primarily storing arterial blood samples for in-vitro diagnosis tests is fulfilled.
The existing water-meeting closed filter element is a water-meeting expansion filter element, although the filter element can quickly block a permeable air hole, because the moisture of the blood at the position of the water-meeting closed filter element is absorbed, the blood becomes thick, the moisture is difficult to continue to permeate, and the water-meeting closed filter element has less water absorption amount.
Disclosure of Invention
The invention aims to provide a filter element capable of absorbing water and expanding when meeting water and an arterial hemostix manufactured by the filter element.
The object of the invention is solved by:
a filter element comprising a closed section and a hydrophilic section connected to the closed section; the closed section is a cylinder made of expansion type particles arranged in gaps of the uniformly distributed plastic particles, and the hydrophilic section is a cylinder with an air-permeable gap sintered by hydrophilic powder; the filter element formed by the closed section and the hydrophilic section is in a cylindrical shape with the same outer diameter; the plastic particles have air-permeable gaps with adjacent expanded particles, and the surface area of the plastic particles is larger than the surface area of the expanded particles.
As a further improvement of the technical scheme of the invention, the plastic particles are made of ultra-high molecular weight polyethylene or high density polyethylene.
As a further improvement of the technical scheme of the invention, the expanded particles are made of high molecular elastomer or water-swellable agent.
As a further improvement of the technical scheme of the invention, the expanded particles are made of one or a combination of the following materials: water-swellable rubber, water-swellable epoxy material, sodium polyacrylate, polyvinyl alcohol and hydrophilic polyurethane prepolymer.
As a further improvement of the technical scheme of the invention, the hydrophilic powder is polyoxyethylene ether or polyvinyl alcohol or polyacrylic acid or a composition of polyoxyethylene ether and ultrahigh molecular weight polyethylene.
An arterial hemostix, comprising the filter element according to any one of claims 1-6, further comprising a syringe, a needle disposed at one end of the syringe, a sealing plug sliding in the syringe, and a needle rod for driving the sealing plug to slide and extend out of the syringe, wherein the filter element is disposed on the sealing plug.
As a further improvement of the technical scheme of the invention, a through hole is arranged in the center of the sealing plug, the filter element is arranged in the through hole of the sealing plug, and one end of the needle rod is connected in the through hole of the sealing plug.
As a further improvement of the technical scheme of the invention, a first diameter-expanding part and a second diameter-expanding part are sequentially arranged on the inner wall of the through hole of the sealing plug from top to bottom, the filter element is arranged in the first diameter-expanding part of the sealing plug, and a diameter-expanding section arranged at one end of the needle rod is arranged in the second diameter-expanding part.
As a further improvement of the technical scheme of the invention, the filter element is arranged in the first diameter-expanding part of the sealing plug, and the hydrophilic section of the filter element is far away from one side of the needle rod.
Compared with the prior art, the invention has the outstanding advantages that:
1. the water permeability of the hydrophilic section of this patent filter core is good, and the arterial hemostix of being convenient for is in leading-in the enclosed section of moisture in with blood fully and absorbed by the enclosed section when taking a blood sample, makes the enclosed section big to the moisture absorbed quantity in the blood, the sealed effect of inflation of enclosed section is good, is applicable to the arterial hemostix.
2. The artery hemostix of this patent is disposable artery hemostix, sets up the filter core on disposable artery hemostix's sealing plug for absorb the moisture in the blood, make the storage time long, the shelf life is effectual, simple structure, low in production cost is applicable to disposable artery hemostix.
Drawings
Fig. 1 is a schematic structural view of an arterial blood collection device of the present invention.
Fig. 2 is a partially enlarged view of fig. 1.
Fig. 3 is a schematic view of the construction of a filter cartridge of the present invention.
Fig. 4 is a schematic perspective view of a cartridge of the present invention.
Detailed Description
The invention is further described in the following with reference to specific embodiments in conjunction with the positive figures, see fig. 1-4:
a filter cartridge 100 comprising a closed section 10 and a hydrophilic section 20 connected to said closed section 10; the closed section 10 is a cylinder made of expanded particles 13 arranged in gaps of uniformly distributed plastic particles 11, the hydrophilic section 20 is a cylinder with an air-permeable gap 22 sintered by hydrophilic powder 21, and the overall appearance of the filter element 100 formed by the closed section 10 and the hydrophilic section 20 is a cylinder with the same outer diameter; the plastic particles 11 and the adjacent expanded particles 13 have air-permeable gaps 12, the surface area of the plastic particles 11 is larger than that of the expanded particles 13, and the air-permeable gaps 22 of the hydrophilic section 20 and the air-permeable gaps 12 between the expanded particles 13 form the whole air-permeable gap of the filter element 100; the hydrophilic section 20 is used for increasing water permeability, so that water is guided into the closed section 10 and absorbed by the expansion type particles 13 of the closed section 10, and the air permeable gap 12 of the closed section 10 is blocked due to the expansion of the expansion type particles 13 after absorbing water.
As a further improvement of the technical scheme of the invention, the plastic particles 11 are made of ultra-high molecular weight polyethylene or high density polyethylene.
As a further improvement of the technical solution of the present invention, the expanded particles 13 are made of a high molecular elastomer or a water-swellable agent.
As a further improvement of the technical solution of the present invention, the expanded particles 13 are made of one or a combination of the following materials: water-swellable rubber, water-swellable epoxy material, sodium polyacrylate, polyvinyl alcohol and hydrophilic polyurethane prepolymer.
As a further improvement of the technical scheme of the invention, the hydrophilic powder 21 is prepared from the following materials or a combination thereof: polyvinyl alcohol, polyvinyl acid, polyoxyethylene ether, polyacrylic acid, sodium polyacrylate, ultra-high molecular weight polyethylene, dimethyl silicone oil and sodium aluminum silicate.
An arterial blood collector 200, comprising a filter cartridge 100 according to any one of claims 1 to 6, wherein the arterial blood collector 200 further comprises a syringe 40, a needle 60 disposed at one end of the syringe 40, a sealing plug 50 sliding in the syringe 40, and a needle rod 30 driving the sealing plug 50 to slide and extend out of the syringe 40, and the filter cartridge 100 is disposed on the sealing plug 50.
As a further improvement of the technical solution of the present invention, a through hole 51 is centrally disposed on the sealing plug 50, the filter cartridge 100 is disposed in the through hole 51 of the sealing plug 50, and one end of the needle rod 30 is connected to the through hole 51 of the sealing plug 50.
As a further improvement of the technical solution of the present invention, a first diameter-expanding part 52 and a second diameter-expanding part 53 are sequentially arranged on the inner wall of the through hole 51 of the sealing plug 50 from top to bottom, the filter element 100 is arranged in the first diameter-expanding part 52 of the sealing plug 50, and the diameter-expanding section 33 arranged at one end of the needle rod 30 is arranged in the second diameter-expanding part 53.
The needle rod 30 includes an expanded diameter section 33 provided at one end of the needle rod 30, a needle rod body 31 below the expanded diameter section 33, and a rib 32 provided on a side wall of the needle rod body 31.
The outer wall of the end of the needle cylinder 40 far away from the needle 60 is provided with a circle of convex ring 12, which is convenient for supporting the needle cylinder 40 by hand when pushing and pulling the needle bar 30.
As a further improvement of the technical solution of the present invention, the filter element 100 is disposed in the first expanded diameter portion of the sealing plug 50, and the hydrophilic section 20 of the filter element 100 is away from the side of the needle bar 30.
When blood is collected, the sealing plug 50 on the needle rod 30 on the arterial hemostix 200 is positioned at the needle 60 side in the needle cylinder 40, the needle 60 on the needle cylinder 40 is pricked into the arterial blood vessel of human body or animal, the convex ring 42 of the needle cylinder 40 is held, the needle rod 30 is slowly pulled backwards, the blood in the arterial blood vessel is sucked into the blood storage cavity 41 between the sealing plug 50 and the needle 60 in the needle cylinder 40 under the action of negative pressure along with the pulling of the needle rod 30, after the blood drawing is finished, the moisture in the blood storage cavity 41 of the arterial hemostix 200 sequentially passes through the through hole 51 on the sealing plug 50 and the hydrophilic section 20 of the filter element 100 to enter the sealing section 10, the moisture in the blood is absorbed by the expansion type particles 13 in the sealing section 10 and then expands to block the ventilation gap 12 (micropore) in the sealing section 10, not only the moisture in the blood is much, but also the expansion volume is large because the sealing section 10 absorbs much moisture in the blood, the sealing performance of the sealing plug 50 is also greatly improved, the central hole on the needle head 60 is sealed, and the extracted arterial blood can be stored or transported for a short time, the hydrophilic section 20 is arranged on the closed section 10 for increasing the water permeability, so that the water is guided into the closed section 10 and is absorbed by the expansion particles 13 of the closed section 10, and the air permeable gap 12 of the closed section 10 is sealed because the expansion particles 13 absorb water and expand; because the moisture of the blood is smoothly guided into the closing section 10 by the hydrophilic section 20 with water permeability, the expansion type particles 13 with large moisture absorption amount absorbed by the closing section 10 absorb more water and have large expansion volume, and the effect of blocking the air permeable gap 12 of the closing section 10 is good.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: it is still possible to make simple substitutions or modifications of the technical solutions or technical features described in the foregoing embodiments, and these simple substitutions or modifications do not depart from the spirit and essence of the technical solutions of the embodiments of the present invention, and still fall within the scope of the present invention.
Claims (9)
1. A filter cartridge, characterized in that: comprises a closed section and a hydrophilic section connected with the closed section; the closed section is a cylinder made of expanded particles arranged in gaps of uniformly distributed plastic particles, and the hydrophilic section is a cylinder with an air-permeable gap sintered by hydrophilic powder; the filter element formed by the closed section and the hydrophilic section is in a cylindrical shape with the same outer diameter; the plastic particles and the adjacent expansion type particles have air-permeable gaps, and the surface area of the plastic particles is larger than that of the expansion type particles.
2. A filter cartridge as recited in claim 1, wherein: the plastic particles are made of ultra-high molecular weight polyethylene or high density polyethylene.
3. A filter cartridge as recited in claim 1, wherein: the expansion type particles are made of high-molecular elastomer or water-swelling agent.
4. A filter cartridge as recited in claim 1, wherein: the expanded particles are made of one or the combination of the following materials: water-swellable rubber, water-swellable epoxy material, sodium polyacrylate, polyvinyl alcohol and hydrophilic polyurethane prepolymer.
5. A filter cartridge as recited in claim 1, wherein: the hydrophilic powder is polyoxyethylene ether or polyvinyl alcohol or polyacrylic acid or a composition of polyoxyethylene ether and ultrahigh molecular weight polyethylene.
6. An arterial hemostix, characterized in that: the filter element according to any one of claims 1 to 6, wherein the arterial blood collector further comprises a syringe, a needle head arranged at one end of the syringe, a sealing plug sliding in the syringe, and a needle rod driving the sealing plug to slide and extend out of the syringe, and the filter element is arranged on the sealing plug.
7. An arterial hemostix according to claim 6 wherein: the filter element is arranged in the through hole of the sealing plug, and one end of the needle rod is connected in the through hole of the sealing plug.
8. An arterial hemostix according to claim 6 wherein: the filter element is arranged in the first diameter expanding part of the sealing plug, and the diameter expanding section arranged at one end of the needle rod is arranged in the second diameter expanding part.
9. An arterial hemostix according to claim 1 wherein: the filter element is arranged in the first diameter expanding part of the sealing plug, and the hydrophilic section of the filter element is far away from one side of the needle rod.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477029.3A CN115025556B (en) | 2022-04-20 | 2022-04-20 | Filter element and arterial hemostix thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210477029.3A CN115025556B (en) | 2022-04-20 | 2022-04-20 | Filter element and arterial hemostix thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115025556A true CN115025556A (en) | 2022-09-09 |
| CN115025556B CN115025556B (en) | 2024-01-30 |
Family
ID=83119419
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210477029.3A Active CN115025556B (en) | 2022-04-20 | 2022-04-20 | Filter element and arterial hemostix thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115025556B (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015238A (en) * | 1989-06-21 | 1991-05-14 | Becton, Dickinson And Company | Expandable obturator and catheter assembly including same |
| US5026354A (en) * | 1990-06-21 | 1991-06-25 | Kocses Joseph W | Safety syringe apparatus |
| JPH0514283U (en) * | 1991-07-31 | 1993-02-23 | 東陶機器株式会社 | Sealing material and drainage pipe connection device for toilet bowl |
| US5736033A (en) * | 1995-12-13 | 1998-04-07 | Coleman; Charles M. | Separator float for blood collection tubes with water swellable material |
| US20050033248A1 (en) * | 2003-08-06 | 2005-02-10 | Hitachi, Ltd. | Automatic urine disposal device and urine receptacle used therefor |
| KR100905298B1 (en) * | 2008-12-19 | 2009-07-02 | 이형훈 | Water expansion type sealing device and the water sealing method using the same |
| CN202725204U (en) * | 2012-08-27 | 2013-02-13 | 浙江硕华医用塑料有限公司 | Disposable pipette with core plug |
| CN107859501A (en) * | 2017-12-28 | 2018-03-30 | 河北鸿凯石油科技有限公司 | A kind of self-expanding card seals device |
| CN210330903U (en) * | 2019-03-27 | 2020-04-17 | 成都吉泰医疗器械有限公司 | Drainage device is sealed to compound hydrophilic layer negative pressure |
| CN210644697U (en) * | 2019-05-28 | 2020-06-02 | 厦门天祚医疗科技有限公司 | Negative pressure drainage device |
| CN211066658U (en) * | 2019-11-19 | 2020-07-24 | 杭州市余杭区第一人民医院 | Negative pressure syringe |
-
2022
- 2022-04-20 CN CN202210477029.3A patent/CN115025556B/en active Active
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5015238A (en) * | 1989-06-21 | 1991-05-14 | Becton, Dickinson And Company | Expandable obturator and catheter assembly including same |
| US5026354A (en) * | 1990-06-21 | 1991-06-25 | Kocses Joseph W | Safety syringe apparatus |
| JPH0514283U (en) * | 1991-07-31 | 1993-02-23 | 東陶機器株式会社 | Sealing material and drainage pipe connection device for toilet bowl |
| US5736033A (en) * | 1995-12-13 | 1998-04-07 | Coleman; Charles M. | Separator float for blood collection tubes with water swellable material |
| US20050033248A1 (en) * | 2003-08-06 | 2005-02-10 | Hitachi, Ltd. | Automatic urine disposal device and urine receptacle used therefor |
| KR100905298B1 (en) * | 2008-12-19 | 2009-07-02 | 이형훈 | Water expansion type sealing device and the water sealing method using the same |
| CN202725204U (en) * | 2012-08-27 | 2013-02-13 | 浙江硕华医用塑料有限公司 | Disposable pipette with core plug |
| CN107859501A (en) * | 2017-12-28 | 2018-03-30 | 河北鸿凯石油科技有限公司 | A kind of self-expanding card seals device |
| CN210330903U (en) * | 2019-03-27 | 2020-04-17 | 成都吉泰医疗器械有限公司 | Drainage device is sealed to compound hydrophilic layer negative pressure |
| CN210644697U (en) * | 2019-05-28 | 2020-06-02 | 厦门天祚医疗科技有限公司 | Negative pressure drainage device |
| CN211066658U (en) * | 2019-11-19 | 2020-07-24 | 杭州市余杭区第一人民医院 | Negative pressure syringe |
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| Publication number | Publication date |
|---|---|
| CN115025556B (en) | 2024-01-30 |
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