CN104922758B - A kind of remaining needle of flexible contact - Google Patents
A kind of remaining needle of flexible contact Download PDFInfo
- Publication number
- CN104922758B CN104922758B CN201510352153.7A CN201510352153A CN104922758B CN 104922758 B CN104922758 B CN 104922758B CN 201510352153 A CN201510352153 A CN 201510352153A CN 104922758 B CN104922758 B CN 104922758B
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- CN
- China
- Prior art keywords
- contact
- stopping clamp
- flexible pipe
- liquid stopping
- indwelling
- 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.)
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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
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on 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
- 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
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1586—Holding accessories for holding infusion needles on the body
Landscapes
- Health & Medical Sciences (AREA)
- Vascular Medicine (AREA)
- Engineering & Computer Science (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
A kind of remaining needle of flexible contact, including indwelling flexible pipe, indwelling needle, the extension flexible pipe for extending base, being connected to indwelling needle and extending between base, the liquid stopping clamp being installed on extension flexible pipe, it is characterised in that at least one contact is to use the spring contact that continuous positive pressure can be formed to extension flexible pipe different from liquid stopping clamp hardness body in the contact up and down of the liquid stopping clamp pressure contact portion point.Due to the liquid stopping clamp structure using flexible contact, the elastic pressure between upper and lower contact is more than the pressure of human vein pressure, both effectively prevents blood backflow the present invention, clamps extension tube again and avoids the liquid of rear end from entering in indwelling flexible pipe.When in the larger external force of extension tube rear end application, during the pressure for making the external force be more than between liquid stopping clamp spring contact, spring contact can be passed through by the highly pressurised liquid for strutting and being allowed in extension tube chamber rear slightly, in indwelling flexible pipe and malleation is formed in extension tube front cavity, the blood that will back flow into indwelling flexible pipe, which is forced, to be returned in blood vessel.
Description
Technical field
The present invention relates to a kind of remaining needle, belong to technical field of medical instruments.
Background technology
Existing remaining needle generally comprises indwelling flexible pipe, indwelling needle, extends base, is connected to indwelling needle and extension tube
Extensions flexible pipe between seat, the liquid stopping clamp being installed on extension flexible pipe, and existing liquid stopping clamp generally comprises holder, integrated device
In the intermediate plate on holder, holder, which is placed through, to be extended on flexible pipe, and can will extend flexible pipe by the cooperation of intermediate plate and holder clamps to be formed
Only liquid.But because existing liquid stopping clamp extends intermediate plate of the flexible pipe in liquid stopping clamp during extension flexible pipe is clamped due to clamping
A resilience is had after release, the former extension flexible pipe clamped is formed an elastic rebound and is caused blood backflow to indwelling flexible pipe
It is interior, cause blood backflow and form thrombus, influence the performance of remaining needle.Simultaneously because the tip of indwelling flexible pipe is open
, the pressure oscillation brought with patient respiration and heartbeat change also occurs that blood back and blood platelet and blood coagulation substance are entered and stayed
Put the phenomenon that blood coagulation plugging is caused in flexible pipe, especially because liquid stopping clamp is actively installed in extension tube, in infusion-completed and
Only after liquid during, liquid stopping clamp is easily swung on indwelling needle, cause extend flexible pipe in liquid produce siphonage and
Vessel inner blood is drawn back into indwelling flexible pipe, blood backflow is caused and forms thrombus, has a strong impact on the usage time of remaining needle,
Therefore existing remaining needle typically can only use 1-2 days just as the formation of thrombus and remaining needle must be pulled out, more renew
Remaining needle.
The content of the invention
It is an object of the invention to presence regarding to the issue above and deficiency, there is provided one kind is simple in construction, only liquid effect is steady
It is fixed reliable, can effectively avoid thrombotic remaining needle.
The technical proposal of the invention is realized in this way：
A kind of remaining needle of flexible contact, including indwelling flexible pipe, indwelling needle, extend base, be connected to remaining needle
Seat and the extension flexible pipe extended between base, the liquid stopping clamp extended on flexible pipe is installed on, the upper of liquid stopping clamp pressure contact portion point is touched
At least one contact is to use that continuous positive pressure can be formed to extending flexible pipe different from liquid stopping clamp hardness body in head, lower contact
Spring contact.
The structure composition of the contact up and down of above-mentioned liquid stopping clamp pressure contact portion point is varied, can be above-mentioned liquid stopping clamp pressure contact portion
Upper contact head, the lower contact divided is all the flexible point-like spring contact that continuous positive pressure can be formed to extending flexible pipe.Can also
The upper contact head for being above-mentioned liquid stopping clamp pressure contact portion point is that the flexible point-like elasticity that continuous positive pressure can be formed to extending flexible pipe is touched
Head, lower contact are and liquid stopping clamp body identical hard point-like contact.It can also be the lower contact of above-mentioned liquid stopping clamp pressure contact portion point
It is the flexible point-like spring contact that continuous positive pressure can be formed to extending flexible pipe, upper contact head is and liquid stopping clamp body identical
Hard point-like contact.The contact up and down that can also be above-mentioned liquid stopping clamp pressure contact portion point is that flexible have larger clamping area
Can to extend flexible pipe formed continuous positive pressure planar spring contact.Can also be that the upper contact head that above-mentioned liquid stopping clamp pressure contact portion is divided is
It is flexible with it is larger clamping area can to extend flexible pipe formed continuous positive pressure planar spring contact, lower contact be with
Liquid stopping clamp body identical hard planar contact.The lower contact that can also be above-mentioned liquid stopping clamp pressure contact portion point is flexible tool
There is the planar spring contact that continuous positive pressure can be formed to extending flexible pipe of larger clamping area, upper contact head is and this body phase of liquid stopping clamp
Same hard planar contact.
Malleation for the further raising present invention stops liquid effect and avoids the formation of thrombus, ensures that liquid stopping clamp will not drive only
Liquid presss from both sides bending or the reflexed of the extension flexible pipe between indwelling needle, and one end of above-mentioned liquid stopping clamp, which is provided with, is securable to indwelling needle side
Sleeve on wall inlet, liquid stopping clamp, on the inlet of indwelling needle, are avoided because stopping by the sleeve Hard link fixing device
Liquid folder swings and causes to extend the swing of flexible pipe and the appearance of twisted phenomena.Now, it is further to improve of the present invention answer
With scope and practicality, the present invention is increased the operating space of medical personnel in operation and reduce medical personnel's touching
The probability of extension tube, avoid the blood siphonage caused by the swing for extending flexible pipe.And facilitate the singlehanded behaviour of medical personnel
Make, while right-hand man's operation is similarly convenient, solves the medical personnel that original left hand is conventional hand, it is difficult with left hand to open clamp
The shortcomings that to open, while liquid stopping clamp foreign body sensation caused by being fixed on indwelling needle can be also reduced, make its angle and indwelling
Pin Y shape seat forms a triangle body, reduces liquid stopping clamp and blows out scope, and hand can be made to be reduced in activity, and collision liquid stopping clamp is tactile to make Y shape
The chance of the movement of seat, the chance of caused indwelling flexible pipe reflexed in the blood vessels.Above-mentioned sleeve is arranged on liquid stopping clamp positioned at only
Liquid presss from both sides the opposite direction end position of openend.
For the present invention due to the liquid stopping clamp structure using flexible contact, the elastic pressure between upper contact head, lower contact is big
In the pressure of human vein pressure, blood backflow is both effectively prevented, extension tube is clamped again and avoids the liquid of rear end from entering indwelling flexible pipe
It is interior.When liquid stopping clamp clamp extension tube transients in, both reduce extend flexible pipe resilience caused by blood siphonage, again
Extension flexible pipe is persistently compressed by the elastic pressure between spring contact, formed in flexible pipe front cavity and indwelling flexible pipe is extended
Lasting malleation and prevent blood backflow.Indwelling flexible pipe is continued during remaining needle indwelling, and using elastic pressuring clamping device
Malleation, make that generation blood backflow will not be fluctuated in indwelling flexible pipe because of vein pressure, and when applying larger external force in extension tube rear end, make
When the external force is more than the pressure between liquid stopping clamp spring contact, the spring contact of liquid stopping clamp can slightly be strutted and allow and extend tube chamber
Highly pressurised liquid in body rear portion is by and entering in indwelling flexible pipe, so as in indwelling flexible pipe and in extension tube front cavity
Continuous positive pressure is formed again, and the blood that will back flow into indwelling flexible pipe, which is forced, to be returned in blood vessel, is reached the purpose of preventing thrombosis and is prolonged
The usage time of long remaining needle reduced increase of the patient because puncturing the pain brought and medical expense repeatedly by 7-10 days.Especially
Ground, the sleeve structure of liquid stopping clamp make liquid stopping clamp Hard link be fixed on indwelling needle, avoid because liquid stopping clamp swing and caused by extend
The swing of flexible pipe and the appearance of twisted phenomena, effectively prevent the extension tube swing of indwelling needle end and distortion causes siphonage to make
Blood backflow is in indwelling needle.The interaction of continuous positive pressure device and sleeve pipe simultaneously makes the liquid in indwelling needle form one
Individual continuous positive pressure, the backflow of blood is further avoid, reach the purpose of preventing thrombosis, and the present invention is simple in construction, it is easy to make
It is practical.
Describe the realization of the present invention in detail below in conjunction with accompanying drawing.
Brief description of the drawings
Fig. 1 is the liquid stopping clamp open mode structural representation of first embodiment of the invention.
Fig. 2 is the liquid stopping clamp clamped condition structural representation of first embodiment of the invention.
Fig. 3 is the liquid stopping clamp open mode structural representation of second embodiment of the invention.
Fig. 4 is the liquid stopping clamp clamped condition structural representation of second embodiment of the invention.
Fig. 5 is the liquid stopping clamp open mode structural representation of third embodiment of the invention.
Fig. 6 is the liquid stopping clamp clamped condition structural representation of third embodiment of the invention.
Fig. 7 is the liquid stopping clamp open mode structural representation of fourth embodiment of the invention.
Fig. 8 is the liquid stopping clamp clamped condition structural representation of fourth embodiment of the invention.
Embodiment
As shown in Figures 1 to 8, a kind of remaining needle of flexible contact of the present invention includes indwelling flexible pipe 11, stayed
Needle stand 1 is put, extends base 4, the extension flexible pipe 2 being connected between indwelling needle 1 and extension base 4, be installed on extension flexible pipe 2
Liquid stopping clamp 3, it is using being different from that the liquid stopping clamp 3, which presses in the upper contact head 31 of contact portion point, lower contact 32 at least one contact,
The spring contact that continuous positive pressure can be formed to extending flexible pipe 2 of 3 rigid body of liquid stopping clamp.Above-mentioned liquid stopping clamp 3 presses the upper of contact portion point
Contact 31, the structure composition of lower contact 32 are varied, can be that as shown in Figures 1 to 6, above-mentioned liquid stopping clamp 3 presses contact portion point
Upper contact head 31, lower contact 32 are all the flexible point-like spring contacts that continuous positive pressure can be formed to extending flexible pipe 2.Can also
It is that the upper contact head 31 that above-mentioned liquid stopping clamp 3 presses contact portion to divide is the flexible point-like bullet that continuous positive pressure can be formed to extending flexible pipe 2
Property contact, lower contact 32 be and the body identical hard point-like contact of liquid stopping clamp 3.Can also be that above-mentioned liquid stopping clamp 3 presses contact portion point
Lower contact 32 be it is flexible can to extend flexible pipe 2 formed continuous positive pressure point-like spring contact, upper contact head 31 be with only
Liquid presss from both sides 3 body identical hard point-like contacts.Can also be as shown in Fig. 7 to Fig. 8, above-mentioned liquid stopping clamp 3 presses the upper of contact portion point to touch
First 31, lower contact 32 is all the flexible planar that continuous positive pressure can be formed to extending flexible pipe 2 with larger clamping area
Spring contact.Can also be above-mentioned liquid stopping clamp 3 press the upper contact head of contact portion point be it is flexible with larger clamping area can
The planar spring contact of continuous positive pressure is formed to extending flexible pipe 2, lower contact 32 is to be touched with the body identical hard planar of liquid stopping clamp 3
Head.Can also be above-mentioned liquid stopping clamp 3 press the lower contact 32 of contact portion point be it is flexible with larger clamping area can be to prolonging
Long soft-pipe 2 forms the planar spring contact of continuous positive pressure, and upper contact head 31 is and the body identical hard planar contact of liquid stopping clamp 3.
For the present invention due to the structure of liquid stopping clamp 3 using flexible contact, the elastic pressure between upper contact head 31, lower contact 32 is more than people
The pressure of vena systemica pressure, blood backflow is both effectively prevented, clamp extension flexible pipe 2 again and avoid the liquid of rear end from entering indwelling flexible pipe 11
It is interior.When liquid stopping clamp 3 is in the transients for clamping extension flexible pipe 2, the blood siphon caused by both reducing the extension resilience of flexible pipe 2 shows
As, persistently compressed further through the elastic pressure between spring contact and extend flexible pipe 2, it is soft in the extension front cavity of flexible pipe 2 and indwelling
Lasting malleation is formed in pipe 11 and prevents blood backflow.During remaining needle indwelling, again using elastic pressuring clamping device to indwelling
The continuous positive pressure of flexible pipe 1, make that blood backflow will not be produced because vein pressure fluctuates in indwelling flexible pipe 11, and after flexible pipe 2 are being extended
End applies larger external force, and during the pressure for making the external force be more than between liquid stopping clamp spring contact, the spring contact of liquid stopping clamp 3 can be micro-
Micro- strut and allow the highly pressurised liquid extended in the chamber rear of flexible pipe 2 by and entering in indwelling flexible pipe 11, so as to soft in indwelling
Continuous positive pressure is formed again in pipe 11 and in the extension front cavity of flexible pipe 2, and the blood that will back flow into indwelling flexible pipe 11 is forced back
Into blood vessel, the usage time for reaching the purpose of preventing thrombosis and extending remaining needle reduced patient because puncturing band repeatedly by 7-10 days
The increase of the pain and medical expense come.
Malleation for the further raising present invention stops liquid effect and avoids the formation of thrombus, ensures that liquid stopping clamp 3 will not drive
The bending of extension flexible pipe 2 between liquid stopping clamp 3 and indwelling needle 1 or reflexed, as shown in Figures 3 to 8, one end of above-mentioned liquid stopping clamp 3
Provided with the sleeve 35 being securable on the side wall inlet of indwelling needle 1, liquid stopping clamp 3 by the Hard link fixing device of sleeve 35 in
On the inlet of indwelling needle 1, avoid because liquid stopping clamp 3 is swung and caused by extend flexible pipe 2 swing and twisted phenomena appearance.This
When, further to improve application and practicality of the present invention, the present invention is increased medical care people in operation
The operating space of member and the probability for reducing medical personnel's touching extension flexible pipe 2, caused by avoiding the swing due to extending flexible pipe 2
Blood siphonage.And facilitate medical personnel's one-handed performance, while right-hand man's operation is similarly convenient, solving original left hand is
The medical personnel of conventional hand, open the shortcomings that clamp is difficult to open with left hand, while can also reduce liquid stopping clamp 3 and be stayed because being fixed on
Caused foreign body sensation on needle stand 1 is put, its angle and remaining needle Y shape seat is formed a triangle body, reduces liquid stopping clamp 3 and blows out model
Enclose, hand can be made to reduce the chance that collision liquid stopping clamp 3 touches the movement for making Y shape seat in activity, caused indwelling flexible pipe 11 is in blood vessel
The chance of interior reflexed.As shown in Figure 5 to Figure 6, above-mentioned sleeve 35 is arranged on liquid stopping clamp 3 positioned at the anti-of the openend 33 of liquid stopping clamp 3
Direction end position.The sleeve structure of liquid stopping clamp 3 makes the Hard link of liquid stopping clamp 3 be fixed on indwelling needle 1, avoids because liquid stopping clamp 3 is put
It is dynamic and cause to extend the appearance of the swing and twisted phenomena of flexible pipe 2, effectively prevent the end of indwelling needle 1 extend flexible pipe 2 swing and
Distortion causes siphonage to make blood backflow in indwelling needle 1.The interaction of continuous positive pressure device and sleeve 35 makes simultaneously
Liquid in indwelling needle 1 forms a continuous positive pressure, further avoid the backflow of blood, reaches the purpose of preventing thrombosis, and
The present invention is simple in construction, makes easily practical.
Claims (9)
1. a kind of remaining needle of flexible contact, including indwelling flexible pipe（11）, indwelling needle（1）, extend base（4）, connection
In indwelling needle（1）With extending base（4）Between extension flexible pipe（2）, be installed on extension flexible pipe（2）On liquid stopping clamp（3）, its
It is characterised by, the liquid stopping clamp（3）Press the upper contact head of contact portion point（31）, lower contact（32）In at least one contact be using not
It is same as liquid stopping clamp（3）Hard body can to extend flexible pipe（2）The spring contact of continuous positive pressure is formed, the spring contact has
Elasticity.
2. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the upper contact head of contact portion point（31）, it is lower touch
Head（32）All be it is flexible can to extend flexible pipe（2）Form the point-like spring contact of continuous positive pressure.
3. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the upper contact head of contact portion point（31）It is tool
It is flexible can to extend flexible pipe（2）Form the point-like spring contact of continuous positive pressure, lower contact（32）For with liquid stopping clamp（3）Body
Identical hard point-like contact.
4. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the lower contact of contact portion point（32）It is tool
It is flexible can to extend flexible pipe（2）Form the point-like spring contact of continuous positive pressure, upper contact head（31）For with liquid stopping clamp（3）Body
Identical hard point-like contact.
5. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the upper contact head of contact portion point（31）, it is lower touch
Head（32）All be it is flexible with it is larger clamping area can to extend flexible pipe（2）The planar elasticity for forming continuous positive pressure is touched
Head.
6. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the upper contact head of contact portion point（31）It is tool
It is flexible with it is larger clamping area can to extend flexible pipe（2）Form the planar spring contact of continuous positive pressure, lower contact
（32）For with liquid stopping clamp（3）Body identical hard planar contact.
7. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）Press the lower contact of contact portion point（32）It is tool
It is flexible with it is larger clamping area can to extend flexible pipe（2）Form the planar spring contact of continuous positive pressure, upper contact head
（31）For with liquid stopping clamp（3）Body identical hard planar contact.
8. remaining needle according to claim 1, it is characterised in that liquid stopping clamp（3）One end be provided be securable to remaining needle
Seat（1）Sleeve on side wall inlet（35）, liquid stopping clamp（3）Pass through the sleeve（35）Hard link fixing device is in indwelling needle
（1）Inlet on, avoid because liquid stopping clamp swing and caused by extend flexible pipe（2）Swing and twisted phenomena appearance.
9. remaining needle according to claim 8, it is characterised in that sleeve（35）It is arranged at liquid stopping clamp（3）It is upper to be located at only liquid
Folder（3）Openend（33）Opposite direction end position.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352153.7A CN104922758B (en) | 2015-06-24 | 2015-06-24 | A kind of remaining needle of flexible contact |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510352153.7A CN104922758B (en) | 2015-06-24 | 2015-06-24 | A kind of remaining needle of flexible contact |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104922758A CN104922758A (en) | 2015-09-23 |
| CN104922758B true CN104922758B (en) | 2018-03-16 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510352153.7A Active CN104922758B (en) | 2015-06-24 | 2015-06-24 | A kind of remaining needle of flexible contact |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104922758B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105194764A (en) * | 2015-09-30 | 2015-12-30 | 上卫医疗器械（苏州）有限公司 | Liquid flow stop clamp |
| CN105709296A (en) * | 2016-04-08 | 2016-06-29 | 广东先来医疗器械有限公司 | Straight-tube anti-thrombus venous indwelling needle |
| CN107998485A (en) * | 2016-10-28 | 2018-05-08 | 邹最 | A kind of preventing thrombosis for venous transfusion is flexible to stop liquid structure and only liquid suit |
| WO2022048132A1 (en) * | 2020-09-02 | 2022-03-10 | 苏州林华医疗器械股份有限公司 | Continuous positive pressure maintaining needle |
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| CN101035592A (en) * | 2004-07-16 | 2007-09-12 | 卡迪纳尔健康303公司 | Automatic clamp apparatus for IV infusion sets used in pump devices |
| CN201847966U (en) * | 2010-09-29 | 2011-06-01 | 柳丰萍 | Easy-blood-returning infusion needle |
| CN202314702U (en) * | 2011-11-09 | 2012-07-11 | 王海红 | Medical retention needle with elastic positive pressure tube sealing clamp |
| CN103861181A (en) * | 2014-03-31 | 2014-06-18 | 苏州市雅思精密模具有限公司 | Positive pressure liquid stop clamp |
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| CN104399143A (en) * | 2014-12-01 | 2015-03-11 | 邹卫平 | Remaining needle with slow release positive pressure |
| CN204208133U (en) * | 2014-10-21 | 2015-03-18 | 广东龙心医疗器械有限公司 | Liquid stopping clamp |
| CN204766840U (en) * | 2015-06-24 | 2015-11-18 | 陈伟权 | Keep somewhere needle with spring contact |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7654996B2 (en) * | 2002-11-04 | 2010-02-02 | Lawrence Allan Lynn | Catheter flushing fluid lock system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101035592A (en) * | 2004-07-16 | 2007-09-12 | 卡迪纳尔健康303公司 | Automatic clamp apparatus for IV infusion sets used in pump devices |
| CN201847966U (en) * | 2010-09-29 | 2011-06-01 | 柳丰萍 | Easy-blood-returning infusion needle |
| CN202314702U (en) * | 2011-11-09 | 2012-07-11 | 王海红 | Medical retention needle with elastic positive pressure tube sealing clamp |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN104922758A (en) | 2015-09-23 |
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