CN109172928A - A kind of injection catheter check-valves - Google Patents
A kind of injection catheter check-valves Download PDFInfo
- Publication number
- CN109172928A CN109172928A CN201811154655.9A CN201811154655A CN109172928A CN 109172928 A CN109172928 A CN 109172928A CN 201811154655 A CN201811154655 A CN 201811154655A CN 109172928 A CN109172928 A CN 109172928A
- Authority
- CN
- China
- Prior art keywords
- annular concave
- perfusion tube
- outflow end
- concave platform
- outer diameter
- 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.)
- Pending
Links
- 238000002347 injection Methods 0.000 title claims abstract description 16
- 239000007924 injection Substances 0.000 title claims abstract description 16
- 230000010412 perfusion Effects 0.000 claims abstract description 33
- 239000007788 liquid Substances 0.000 claims abstract description 15
- 238000001802 infusion Methods 0.000 claims abstract description 8
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 7
- 238000009434 installation Methods 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- 239000008280 blood Substances 0.000 description 1
- 210000004369 blood Anatomy 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002560 therapeutic procedure Methods 0.000 description 1
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
- A61M5/168—Means for controlling media flow to the body or for metering media to the body, e.g. drip meters, counters ; Monitoring media flow to the body
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
- A61M39/22—Valves or arrangement of valves
- A61M39/24—Check- or non-return valves
- A61M2039/242—Check- or non-return valves designed to open when a predetermined pressure or flow rate has been reached, e.g. check valve actuated by fluid
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/33—Controlling, regulating or measuring
- A61M2205/3331—Pressure; Flow
Landscapes
- Health & Medical Sciences (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The present invention provides a kind of injection catheter check-valves, are connected on perfusion tube, and the liquid in perfusion tube is made to be merely able to flow out, and cannot flow backwards, and have ensured life security of the patient in infusion process.Check-valves is connected on perfusion tube, is divided into along liquid flow direction and is flowed into end and outflow end, and the internal diameter for flowing into one end that end is connect with perfusion tube is greater than the outer diameter of perfusion tube, and the transfusion pole, which is plugged on, flows into end；The internal diameter of one end that the outflow end is connect with perfusion tube is greater than the outer diameter of perfusion tube, and the perfusion tube is plugged on outflow end；The inflow end is connected with outflow end by connected structure, internal to be connected by inner passage；The inflow end and outflow end are equipped with compressing structure, and elastic disk is fixed on to the exit for flowing into end by compressing structure.
Description
Technical field
The invention belongs to technical field of medical equipment, more particularly, to a kind of injection catheter check-valves.
Background technique
In the diagnosis of disease or therapeutic process, infusion is one of common treatment means, in human transfusion or is led to
During piping conveys liquid, blood back can occur in infusion process in the case where often will appear reflux, such as human body
The case where, this is all that liquid flows backwards to be formed, sometimes if it find that not in time, may jeopardize the life security of patient.
Summary of the invention
In view of this, the present invention is directed to propose a kind of injection catheter check-valves, to solve in existing infusion process, often
There is the case where liquid reflux, if it find that not in time, the life security of patient can be jeopardized.
In order to achieve the above objectives, the technical scheme of the present invention is realized as follows:
A kind of injection catheter check-valves, is connected on perfusion tube, is divided into along liquid flow direction and flows into end and outflow end, the inflow end
The internal diameter of the one end connecting with perfusion tube is greater than the outer diameter of perfusion tube, and the transfusion pole, which is plugged on, flows into end；The outflow end with
The internal diameter of one end of perfusion tube connection is greater than the outer diameter of perfusion tube, and the perfusion tube is plugged on outflow end；
The inflow end is connected with outflow end by connected structure, internal to be connected by inner passage；The inflow end and outflow
Junction is held to be equipped with elastic disk, the outer diameter of the elasticity disk is greater than the internal diameter for flowing into the inner passage at end, the Elastic Circular
The outer diameter of piece is less than the internal diameter of the inner passage of junction outflow end；
The inflow end and outflow end are equipped with compressing structure, and elastic disk is fixed on to the outlet for flowing into end by compressing structure
Place.
Further, the described end one end adjacent with outflow end that flow into extends to form bulge loop outward, the outside of bulge loop and
It flows between end and forms first annular concave station, the outflow end is equipped with the second annular concave platform corresponding with the bulge loop, described
Bulge loop and the second annular concave platform grafting；
It is additionally provided with the third annular concave platform being recessed inwardly on the inside of the bulge loop, is internal logical on the inside of the third annular concave platform
Road, the third annular concave platform is interior to be equipped with elastic disk, and the elasticity disk is pressed on third annular concave platform by compressing structure
Interior, the outer diameter of the elasticity disk is greater than the internal diameter of third annular concave platform, less than the outer diameter of third annular concave platform, the Elastic Circular
Internal diameter of the outer diameter of piece less than the second annular concave platform.
Further, equipped with hole is penetrated, the internal diameter for penetrating hole is greater than perfusion tube for the described one end of end far from outflow end that flows into
Outer diameter, block is equipped in check-valves, hole will be penetrated by block and blocked, the end of block one end adjacent with hole is penetrated
Thickness it is identical as the wall thickness of perfusion tube.
Further, the elastic disk is silica gel piece, and the elasticity disk two sides are designed with circular groove；
The compressing structure is circular arc boss, and the radius of the arc boss is identical as the radius of the circular groove；
The arc boss is two, the first arc boss on the inside of the third annular concave platform including inflow end is arranged in, and
The second arc boss on the inside of second annular concave platform of outflow end is set；
First arc boss and the second arc boss are corresponding, and cooperation compresses elastic disk.
Further, described to flow into end and outflow end to be equipped with the side of arc boss be all entity structure, inside check-valves
Side equipped with arc boss is planar structure.
Further, position limiting structure is additionally provided between inflow end and the outflow end, the position limiting structure includes that setting exists
Limiting slot on the outside of bulge loop, and the limited block being arranged on the second annular concave platform, the limiting slot and the limited block cooperate
Installation.
Compared with the existing technology, injection catheter check-valves of the present invention has the advantage that
Injection catheter check-valves of the present invention is connected on perfusion tube, and the liquid in perfusion tube is made to be merely able to flow out, cannot
It flows backwards, has ensured life security of the patient in infusion process.
Detailed description of the invention
The attached drawing for constituting a part of the invention is used to provide further understanding of the present invention, schematic reality of the invention
It applies example and its explanation is used to explain the present invention, do not constitute improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is injection catheter check-valves entirety sectional view described in the embodiment of the present invention；
Fig. 2 is inflow end structure figure described in the embodiment of the present invention；
Fig. 3 is outflow end structure chart described in the embodiment of the present invention；
Fig. 4 is elastic wafer architecture figure described in the embodiment of the present invention.
Description of symbols:
1, end is flowed into；11, first annular concave station；12, third annular concave platform；13, the first arc boss；14, limiting slot；15, convex
Ring；2, outflow end；21, the second annular concave platform；22, limited block；23, the second arc boss；3, elastic disk；31, circular groove.
Specific embodiment
It should be noted that in the absence of conflict, the feature in embodiment and embodiment in the present invention can phase
Mutually combination.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", "upper", "lower",
The orientation or positional relationship of the instructions such as "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside" is
It is based on the orientation or positional relationship shown in the drawings, is merely for convenience of description of the present invention and simplification of the description, rather than instruction or dark
Show that signified device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as pair
Limitation of the invention.In addition, term " first ", " second " etc. are used for description purposes only, it is not understood to indicate or imply phase
To importance or implicitly indicate the quantity of indicated technical characteristic.The feature for defining " first ", " second " etc. as a result, can
To explicitly or implicitly include one or more of the features.In the description of the present invention, unless otherwise indicated, " multiple "
It is meant that two or more.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or be integrally connected；It can
To be mechanical connection, it is also possible to be electrically connected；It can be directly connected, can also can be indirectly connected through an intermediary
Connection inside two elements.For the ordinary skill in the art, above-mentioned term can be understood by concrete condition
Concrete meaning in the present invention.
The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
As shown in Figure 1 to Figure 3, a kind of injection catheter check-valves, is connected on perfusion tube, is divided into along liquid flow direction and flows into end
1 and outflow end 2, the outer diameter of the internal diameter for flowing into one end that end 1 is connect with perfusion tube greater than perfusion tube, the transfusion pole grafting
Flowing into end 1；The internal diameter of one end that the outflow end 2 is connect with perfusion tube is greater than the outer diameter of perfusion tube, the perfusion tube grafting
In outflow end 2；
The inflow end 1 is connected with outflow end 2 by connected structure, internal to be connected by inner passage；The inflow end 1 and stream
2 junction of outlet is equipped with elastic disk 3, and the outer diameter of the elasticity disk 3 is greater than the internal diameter for flowing into the inner passage at end 1, described
The outer diameter of elastic disk 3 is less than the internal diameter of the inner passage of junction outflow end 2；
The inflow end 1 and outflow end 2 are equipped with compressing structure, are fixed on elastic disk 3 by compressing structure and flow into end 1
Exit.
As shown in Figure 1 to Figure 3, the described one end adjacent with outflow end 2 of end 1 that flow into extends to form bulge loop 15 outward, convex
First annular concave station 11 is formed between the outside and inflow end 1 of ring 15, the outflow end 2 is equipped with corresponding with the bulge loop 15
Second annular concave platform 21, the bulge loop 15 and 21 grafting of the second annular concave platform；
It is additionally provided with the third annular concave platform 12 being recessed inwardly on the inside of the bulge loop 15, is interior on the inside of the third annular concave platform 12
Portion channel, the third annular concave platform 12 is interior to be equipped with elastic disk 3, and the elasticity disk 3 is pressed on third by compressing structure
In annular concave platform 12, the outer diameter of the elasticity disk 3 is greater than the internal diameter of third annular concave platform 12, less than third annular concave platform 12
Outer diameter, it is described elasticity disk 3 outer diameter less than the second annular concave platform 21 internal diameter.
Elastic disk 3 is to block the internal pipeline for flowing into end 1 under normal circumstances, in infusion process, flows into inflow
The liquid at end 1 has an impact force to elastic disk 3, and elastic disk 3 is opened to 2 direction of outflow end under the influence of the impact force,
Liquid by elastic disk and 2 conveying of outflow end at, when the pressure of lower section is larger, and liquid flows back the case where, Elastic Circular
Piece 3 can block the inner passage for flowing into end 1 under the impact force of the liquid of reflux, effective anti-backflow.
Equipped with hole is penetrated, the internal diameter for penetrating hole is greater than the outer diameter of perfusion tube for the described one end of end 1 far from outflow end 2 that flows into,
It is equipped with block in check-valves, hole will be penetrated by block and blocked, the thickness of the end of block one end adjacent with hole is penetrated
It is identical as the wall thickness of perfusion tube.
Structure of the outflow end 2 far from the one end for flowing into end 1 is identical as inflow end 1, is not only convenient for being inserted into so defeated
Liquid pipe is also effectively reduced in infusion process, impact force of the liquid to check-valves.
As shown in figure 4, the elasticity disk 3 is silica gel piece, 3 two sides of the elasticity disk are designed with circular groove 31；
The compressing structure is circular arc boss, and the radius of the arc boss is identical as the radius of the circular groove 31；
The arc boss is two, and the first arc boss 13 of 12 inside of third annular concave platform at end 1 is flowed into including being arranged in,
And the second arc boss 23 of 21 inside of the second annular concave platform of outflow end 2 is set；
First arc boss 13 and the second arc boss 23 are corresponding, and cooperation compresses elastic disk 3.
The side of end 1 and outflow end 2 equipped with arc boss that flows into all is entity structure, is equipped with arc inside check-valves
The side of boss is planar structure.
Position limiting structure is additionally provided between the inflow end 1 and outflow end 2, the position limiting structure includes being arranged outside bulge loop 15
The limiting slot 14 of side, and the limited block 22 being arranged on the second annular concave platform 21, the limiting slot 14 and the limited block 22
It is coupled.By the more convenient Fast Installation for flowing into end 1 and outflow end 2 of position limiting structure, and it is convex to can be two arcs
Platform accurately compresses elastic disk 3.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (6)
1. a kind of injection catheter check-valves, it is characterised in that: be connected on perfusion tube, along liquid flow direction be divided into flow into end (1) and
Outflow end (2), the internal diameter for flowing into one end that end (1) is connect with perfusion tube are greater than the outer diameter of perfusion tube, and the transfusion pole is inserted
It connects and is flowing into end (1)；The internal diameter of one end that the outflow end (2) connect with perfusion tube is greater than the outer diameter of perfusion tube, the infusion
Pipe is plugged on outflow end (2)；
The inflow end (1) is connected with outflow end (2) by connected structure, internal to be connected by inner passage；The inflow end
(1) and outflow end (2) junction is equipped with elastic disk (3), and the outer diameter of the elasticity disk (3) is greater than the inside for flowing into end (1)
The internal diameter in channel, the outer diameter of the elasticity disk (3) are less than the internal diameter of the inner passage of junction outflow end (2)；
The inflow end (1) and outflow end (2) are equipped with compressing structure, and elastic disk (3) is fixed on stream by compressing structure
Enter the exit at end (1).
2. injection catheter check-valves according to claim 1, it is characterised in that: the inflow end (1) and outflow end (2) phase
Adjacent one end extends to form bulge loop (15) outward, forms first annular concave station between the outside and inflow end (1) of bulge loop (15)
(11), the outflow end (2) is equipped with the second annular concave platform (21) corresponding with the bulge loop (15), the bulge loop (15) and institute
State the second annular concave platform (21) grafting；
The third annular concave platform (12) being recessed inwardly is additionally provided on the inside of the bulge loop (15), the third annular concave platform (12) is interior
Side is inner passage, elastic disk (3) is equipped in the third annular concave platform (12), the elasticity disk (3) is by compressing knot
Structure is pressed in third annular concave platform (12), and the outer diameter of the elasticity disk (3) is greater than the internal diameter of third annular concave platform (12), small
Outer diameter in third annular concave platform (12), it is described elasticity disk (3) outer diameter less than the second annular concave platform (21) internal diameter.
3. injection catheter check-valves according to claim 1, it is characterised in that: the inflow end (1) is far from outflow end (2)
One end be equipped with and penetrate hole, the internal diameter for penetrating hole is greater than the outer diameter of perfusion tube, and block is equipped in check-valves, will be penetrated by block
Hole is blocked, the block and penetrate the adjacent one end in hole end thickness it is identical as the wall thickness of perfusion tube.
4. injection catheter check-valves according to claim 1, it is characterised in that: the elasticity disk (3) is silica gel piece, institute
It states elastic disk (3) two sides and is designed with circular groove (31)；
The compressing structure is circular arc boss, and the radius of the arc boss is identical as the radius of the circular groove (31)；
The arc boss is two, and the first arc including being arranged on the inside of the third annular concave platform (12) for flowing into end (1) is convex
Platform (13), and the second arc boss (23) being arranged on the inside of the second annular concave platform (21) of outflow end (2)；
First arc boss (13) and the second arc boss (23) are corresponding, and cooperation compresses elastic disk (3).
5. injection catheter check-valves according to claim 4, it is characterised in that: the inflow end (1) and outflow end (2) are set
The side for having arc boss is all entity structure, and the side that arc boss is equipped with inside check-valves is planar structure.
6. injection catheter check-valves according to claim 1, it is characterised in that: the inflow end (1) and outflow end (2) it
Between be additionally provided with position limiting structure, the position limiting structure includes the limiting slot (14) being arranged on the outside of bulge loop (15), and setting is the
Limited block (22) on second ring concave station (21), the limiting slot (14) are coupled with the limited block (22).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154655.9A CN109172928A (en) | 2018-09-30 | 2018-09-30 | A kind of injection catheter check-valves |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811154655.9A CN109172928A (en) | 2018-09-30 | 2018-09-30 | A kind of injection catheter check-valves |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109172928A true CN109172928A (en) | 2019-01-11 |
Family
ID=64907059
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811154655.9A Pending CN109172928A (en) | 2018-09-30 | 2018-09-30 | A kind of injection catheter check-valves |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109172928A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947092A (en) * | 2019-10-22 | 2020-04-03 | 浙江省北大信息技术高等研究院 | One-way valve and medical catheter with same |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5807312A (en) * | 1997-05-23 | 1998-09-15 | Dzwonkiewicz; Mark R. | Bolus pump apparatus |
| CN1502026A (en) * | 2001-03-21 | 2004-06-02 | ��ʽ����Jms | Rotary connector with valve |
| CN201267678Y (en) * | 2008-07-18 | 2009-07-08 | 上海双鸽实业有限公司 | Disposal one-way valve for infusion |
| CN201533946U (en) * | 2009-11-19 | 2010-07-28 | 天津市塑料研究所 | Medical one-way valve |
| CN201658732U (en) * | 2010-03-19 | 2010-12-01 | 黄锦平 | Backflow-preventing catheter |
| CN202236533U (en) * | 2011-10-13 | 2012-05-30 | 汤善芳 | Check valve for hemodialysis machine |
| CN202691164U (en) * | 2012-07-31 | 2013-01-23 | 江苏省原子医学研究所 | Medical check valve |
| CN103052416A (en) * | 2010-08-06 | 2013-04-17 | En大冢制药株式会社 | Three-way valve unit, non-return valve, and fluid material transfer device |
| CN104984435A (en) * | 2015-07-24 | 2015-10-21 | 朱文和 | Infusion tube capable of preventing blood backflow |
| CN210078597U (en) * | 2018-09-30 | 2020-02-18 | 天津伊腾圣杰医疗器械有限公司 | Check valve for transfusion |
-
2018
- 2018-09-30 CN CN201811154655.9A patent/CN109172928A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5807312A (en) * | 1997-05-23 | 1998-09-15 | Dzwonkiewicz; Mark R. | Bolus pump apparatus |
| CN1502026A (en) * | 2001-03-21 | 2004-06-02 | ��ʽ����Jms | Rotary connector with valve |
| CN201267678Y (en) * | 2008-07-18 | 2009-07-08 | 上海双鸽实业有限公司 | Disposal one-way valve for infusion |
| CN201533946U (en) * | 2009-11-19 | 2010-07-28 | 天津市塑料研究所 | Medical one-way valve |
| CN201658732U (en) * | 2010-03-19 | 2010-12-01 | 黄锦平 | Backflow-preventing catheter |
| CN103052416A (en) * | 2010-08-06 | 2013-04-17 | En大冢制药株式会社 | Three-way valve unit, non-return valve, and fluid material transfer device |
| CN202236533U (en) * | 2011-10-13 | 2012-05-30 | 汤善芳 | Check valve for hemodialysis machine |
| CN202691164U (en) * | 2012-07-31 | 2013-01-23 | 江苏省原子医学研究所 | Medical check valve |
| CN104984435A (en) * | 2015-07-24 | 2015-10-21 | 朱文和 | Infusion tube capable of preventing blood backflow |
| CN210078597U (en) * | 2018-09-30 | 2020-02-18 | 天津伊腾圣杰医疗器械有限公司 | Check valve for transfusion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110947092A (en) * | 2019-10-22 | 2020-04-03 | 浙江省北大信息技术高等研究院 | One-way valve and medical catheter with same |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190111 |