CN101269253A - H type safety needle for remaining in vein and artery with non-needle interface positive pressure air-proof valve - Google Patents
H type safety needle for remaining in vein and artery with non-needle interface positive pressure air-proof valve Download PDFInfo
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- CN101269253A CN101269253A CNA2007101925531A CN200710192553A CN101269253A CN 101269253 A CN101269253 A CN 101269253A CN A2007101925531 A CNA2007101925531 A CN A2007101925531A CN 200710192553 A CN200710192553 A CN 200710192553A CN 101269253 A CN101269253 A CN 101269253A
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Abstract
The invention provides an H-shaped safe arterial-venous indwelling needle with a needle-free interface positive-pressure obturating valve. A puncturing needle, a puncturing needle holder, a puncturing needle protecting sleeve tube, a protecting spring, and a limiting cable form a safe puncturing needle; an indwelling needle tube, a puncturing needle guiding tube, an indwelling needle holder, and an obturating plug form an arterial-venous indwelling needle; a shell, a piston, an obturating ring, a spring, and a base form a needle-free interface positive-pressure obturating valve. The positive-pressure valve shell and the indwelling needle holder are in juxtaposition and present an H shape; the safe puncturing needle is enclosed in the indwelling needle tube in parallel. All the above parts form the invention. The arterial-venous indwelling needle of the invention can initiatively protect the puncturing needle, and prevent the medical worker and the waste treating people from being stabbed; the needle-free interface positive-pressure obturating valve can prevent the venous blood from flowing back and flowing over, can prevent the blood from being polluted, and can avoid that the blood flows back into the indwelling needle tube to form clots, dispensing with heparin obturating tube and other cumbersome operations. The needle-free interface connection can avoid needle stabbing during the needle connection, can improve working efficiency and protect the medical caring worker and the patient, and can lower the fee for medical service.
Description
Technical field
The present invention relates to a kind of medical apparatus and instruments that is used for infusion liquid, a kind of specifically be used for artery and vein puncture process and puncture back thereof in the indwelling phase in blood vessel the safety venous indwelling needle of the positive-pressure closing valve with needleless interface of infusion liquid.
Background technology
Transfusion almost can be imported human body by blood vessel with all medicinal liquids, realizes treatment and prophylactic purpose.In clinical, usually can be because of periodic treatment plan, repeatedly puncture vessel carries out infusion treatment.In to infusion treatment processes such as chemotherapy, cardiovascular and cerebrovascular diseases and the children's of tumor, old people's blood vessel condition differences, patient's blood vessel is damaged because of repeatedly puncturing, or due to illness the people mismatches, can increase the painful and puncture procedure difficulty of patient, even can destroy (the blood vessel injury portion after the puncture can form cicatrix, in a short time the logical again difficulty of blood flow) because of the repeatedly puncture of showing shallow blood vessel, and the use of can not puncturing once more, influence infusion treatment, finally need realize the treatment transfusion the deep vascular puncture.The damage that causes blood vessel for avoiding repeatedly puncturing and reduce patient's misery also for alleviating nurse operation intensity, has generally been used iv cannule (pipe) technology in clinical.It is by the technical scheme (apparatus) of a soft tube pin is set at metal puncture pin outer surface, in the vascular puncture process, the soft tube pin is brought into blood vessel, pull out the metal puncture pin again, and the soft tube pin is retained in endovascular liquid infusion apparatus---iv cannule.Thereby prolong the indwelling time of soft pin in vein blood vessel, reduce the misery and the loaded down with trivial details work of puncture once more.The iv cannule of present clinical use is made up of heparin (sealing) medicated cap, puncture needle, Paracentesis needle holder, indwelling soft tube pin, indwelling needle stand, remaining needle protective sleeve mostly.They can be finished the vascular puncture process substantially and keep somewhere the indwelling (bury stay) of soft tube pin in artery and vein vascular; But, according to the principle of the WHO of World Health Organization (WHO): 1, harmless to the implementer about safety injection (infusion) three elements; 2, harmless to the receiver; 3, harmless to environment and other people.Through permanent clinical a large amount of practical proof, (according to statistics and record, the first betides U.S. nurse in 1986 because of pricking wound causes sick infection of AIDS in the world.Domestic statistics per 10 middle of the month, on average each clinical nurse is by pricking wound 2.5 times.) iv cannule that uses now has following many defectives and deficiency:
The one: there are security risk in user and peripheral personnel: because the metal puncture pin will run through remaining needle, the more common puncture needle of its length is long, after puncture is pulled out, appearance is without any preventer, cause medical personnel and later Biohazard Waste treatment people by pricking wound easily, have the risk that causes nosocomial infection because of the virus that contains in the blood on the needle point.
The 2nd: reaching on every side to receiver both patient, there is security risk in personnel: because it is identical with common Paracentesis needle holder structure to keep somewhere needle stand, there are not the measure or the device that prevent blood back flow (backflow), make after puncture needle is pulled out, blood can reflux excessive, contaminated environment and human body form security risk; Moreover, using remaining needle to repeat in the infusion process, the infusion connector after the transfusion is pulled out, must make the remaining needle inner chamber form certain negative pressure, can cause and keep somewhere in the needle tubing and vessel inner blood refluxes to enter and keeps somewhere in the needle tubing, blood coagulation takes place, form embolus, stop up the remaining needle passage.When reusing,, can influence and treat and increase medical personnel and work because of the remaining needle passage stops up; Moreover, if the embolus intravasation that comes off, then can enter the tissue or the organ of human body different parts with blood flow, cause the thromboembolism of this tissue or organ blood vessel, the serious ischemia that causes this organ, necrosis, consequence is very serious and dangerous.
The 3rd: increase medical care labor intensity, operate loaded down with trivial details, and take place bolt stifled after, need puncture again, can increase patient's misery and burden.For this reason, the remaining needle of present clinical use, its protection rules are after pulling out joint, must use a kind of helmet, the remaining needle interface is sealed, in order to prevent that blood from solidifying in keeping somewhere needle tubing, must use anticoagulant (heparin sodium aqua) again, be injected into and keep somewhere in the needle tubing, (so that this closing cover renames as calparine cap), be specifically designed to remaining needle is carried out the anticoagulant tube sealing, per 8 hours once, the strict execution.This had both increased the operation of medical workers program, had also increased patient's financial burden, also because the patient of some blood coagulation mechanism obstacle can not use anticoagulant because of the hemorrhage risk of haemolysis, its application was restricted; In addition, be to adopt acupuncture manipulation when remaining needle is carried out the anticoagulant tube sealing, also increased medical personnel by the danger of pricking wound.
Chinese patent: CN200410041490.6 discloses a kind of lamellar valve that is provided with a pair of wedge shape in sleeve pipe, can prevent the iv cannule of blood back flow.Chinese patent: CN200620080001.2 discloses the another kind of excessive method of blood backflow that prevents automatically, be to be provided with sealing-plug and conducting support at the tail intracavity of keeping somewhere needle stand, rubber seal plug seal fluid runner, borrow conducting support (sleeve pipe) under external force (transfusion device or syringe or conduit socket) effect, it to be run through sealing-plug, conducting once more, but after not being set forth in sockets such as transfusion device and pulling out, how the conducting support breaks away from from sealing-plug, Mi Feng structure once more, so this product can only satisfy the once use of remaining needle and fluid pipeline interface.But also only be to have prevented after puncture, prevent the adverse current of blood or liquid when pulling out puncture needle, avoid contaminated environment and operator.Chinese patent: CN200510051051.8 discloses a kind of method of safety indwelling needle, is to make the needle body that expands at the front end of puncture needle, limits the landing of needle point protective casing on needle point leading portion needle body with this, protects the technical scheme of needle point.
More than disclosed technical scheme all do not solve the root problem that present remaining needle exists:
1, puncture needle pulling out in the process after the vascular puncture success can not prevent effectively that blood is excessive by the blood that the needle body passage causes, pollution that may cause or cross infection thus;
2, the needle tip protector is incomplete or unreasonable.In above-mentioned disclosed patent, needle tubing is made and is expanded ball, though satisfied coming off of limiting protecting cover, needle tubing exists resistance or obstacle in inserting remaining needle flexible pipe and needle stand process.And the puncture needle protective sleeve that the concatenation type sleeve pipe constitutes has also increased the length of puncture needle integral body, has increased the inconvenience and the cost of operation.
3, crucial is that the socket of remaining needle needle stand and transfusion device or syringe or liquid infusion device is pegged graft after the transfusion, and after pulling out socket, vessel inner blood is because of pulling out the negative pressure of socket formation, can cause the backflow of blood, blood enters the remaining needle flexible pipe and solidifies, and remaining needle stops up, and transfusion can not and cause once more, severe patient, the blood clot intravasation that comes off along with blood flow, can cause the venous thrombosis of little blood vessel, cause portion of tissue or organ ischemic necrosis, cause serious consequence.
At present, the domestic technology that can solve above-mentioned insufficient iv cannule fully of also not seeing is disclosed.
I have narrated the iv cannule that a kind of axial I type has needleless interface positive-pressure closing valve in CN20071003546.0, its scheme is that needleless interface positive-pressure closing valve is connected in series with I type venous detaining needle, constitutes the iv cannule with needleless interface, positive-pressure closing, security protection puncture needle function.But because its puncture needle and infusion connector all by identical needleless interface, make this technical scheme in implementation process, complex structure, cost is higher.
Iv cannule with needleless interface positive-pressure closing valve of the present invention has adopted puncture needle and transfusion interface isolating H type structure, makes easy to manufacturely, simple in structure, is beneficial to universal.
Summary of the invention
The invention provides and a kind ofly can solve above-mentioned insufficient H type safety venous indwelling needle with needleless interface positive-pressure closing valve.Technical scheme provided by the invention is such: become the present invention by safety puncture needle, needleless interface positive-pressure closing valve, remaining needle three part mutual group.It is characterized in that: the needle body surface of puncture needle is equipped with the needle point automatic safety device, and it is by tie-down cable and protect spring, needle point protective casing to form; Tie-down cable discharges the attitude equal in length and is slightly larger than needle length with the protection spring, their end is fixed in the Paracentesis needle holder, the other end inserts in the protective casing and fixes, and needle point can be overlapped fully and protect, the leading portion of spring has a bending, discharging the centre bore that can make needle point depart from protective casing under the attitude, length is only for discharging about 10% of attitude when compression for spring, and the retraction protective casing is interior and enter in the handle of Paracentesis needle holder hidden fully; Said needleless interface positive-pressure closing valve is made up of housing, piston, sealing ring, spring, base, the standard Luer interface is made in the outer, upper end of said housing, to spin with the transfusion device plug, in the space of housing and base composition, piston moving up and down is arranged, the hypomere internal diameter of housing is more than 1.2 times of epimere internal diameter, piston hypomere external diameter is more than 1.2 times of epimere external diameter, and adapting to be with hypomere internal diameter on the housing is slidingly matched, and two sealing rings are embedded in the piston upper and lower side groove and with inner walls and are slipper seal; In the space between piston lower end endoporus and the base spring is arranged; Said housing is H type structure with keeping somewhere arranged side by side linking to each other of needle stand, at the stage casing of housing sidewall one aperture and indwelling needle stand inner chamber perforation arranged side by side is arranged; Said iv cannule is by keeping somewhere needle stand, sealing-plug, puncture needle guiding tube and keeping somewhere soft needle tubing and form; The reducing of said needle stand hypomere, built-in tubaeform puncture needle guiding tube, this guiding tube lower end slim pipe diameter is connected and fixed with indwelling flexible pipe pin; The epimere diameter of keeping somewhere the needle stand endoporus is than the stage casing slightly larger in diameter, be shaped on a longitudinal channel in close housing one side of keeping somewhere needle stand endoporus stage casing and link to each other with side opening, sealing-plug will be kept somewhere the sealing of needle stand epimere endoporus, and puncture needle passes through from the sealing-plug center, after puncture needle is pulled out, and keep airtight; The standard Luer interface is made in the outer, upper end of said indwelling needle stand, to revolve slotting with Paracentesis needle holder, the remaining needle flexible pipe is made by the no-toxicity medical macromolecular material, transparent, front end is the reducing chamfering, tube cavity has several inside ridges, with the anti-flat performance of the resistance to compression that increases flexible pipe, also observes the usefulness of puncture effect along metal puncture pin outer wall and the backflow of hose inner wall gap for blood.
The present invention has following technical characterictic: form elasticity puncture needle protection structure owing to adopted by spring and tie-down cable, protective casing; needle length is not prolonged; the puncture good hand touch; control accurately, and can be with needle body surface blood (sealed plug) wiped clean after puncture, and be wrapped in needle point in the protective casing automatically rapidly; knuckle because of the spring front end; must make the protective sleeve skew, make one side of needle point deflection sheath, and can not expose once more.Because spring is subjected to the restriction of tie-down cable, can not excess elongation, make protective casing can only be enclosed within the needle point place, make needle point obtain solid protection.Because puncture needle has adopted automatic safe protective device, avoided medical personnel and other people member to be punctured the danger of pricking wound.
Because the present invention has adopted the positive-pressure closing valve of piston structure, makes the present invention in application, after pulling out the transfusion plug, produce malleation, liquid is pressed to vein blood vessel, can stop the backflow of blood, it is stifled to avoid forming the blood bolt.Thereby do not need the anticoagulant tube sealing, can alleviate nurse's work, reduce medical expense;
Because the present invention has adopted needleless interface, when reusing, do not need acupuncture to connect, thereby avoid the nurse by the risk of pricking wound;
Because the present invention adopted remaining needle and positive-pressure closing valve H type structure arranged side by side, make easy to manufacturely, to implement simply, volume is small, light, is easy to fixedly carry, is beneficial to universal.
Description of drawings
Fig. 1 is a building block decomposing schematic representation of the present invention;
Fig. 2 is a combinative structure sketch map of the present invention;
Fig. 3 is a puncture needle protector squeezed state sketch map of the present invention;
Fig. 4 is that puncture needle protector of the present invention discharges the attitude sketch map;
Fig. 5 is the structural representation of the indwelling phase in blood vessel (when not infusing) of the safety H type iv cannule of the present invention with needleless interface positive-pressure closing valve;
Fig. 6 be the safety iv cannule of the present invention with needleless interface positive-pressure closing valve with the structural representation of infusion connector connection status (during transfusion);
Specific embodiment
As shown in Figure 1, the present invention is made up of safety puncture needle and needleless interface positive-pressure closing valve and three parts of remaining needle; Remaining needle is made up of remaining needle flexible pipe 8, puncture needle guiding tube 7, remaining needle needle stand 9 and puncture needle sealing-plug 6, wherein remaining needle flexible pipe 8 is made by the no-toxicity medical macromolecular material, transparent, front end is reducing chamfering 8a, tube cavity has several inside ridge 8b, with the anti-flat performance of the resistance to compression that increases flexible pipe, also observe the usefulness of puncture effect along metal puncture pin outer wall and the backflow of hose inner wall gap for blood.Needleless interface positive-pressure closing valve is made of jointly housing 9A, piston 11, sealing ring 10a, 10b, spring 2b, base 12.The safety puncture needle is made up of Paracentesis needle holder 1, puncture needle 5, tie-down cable 3, spring 2a, needle point protective casing 4; Wherein: the side of Paracentesis needle holder 1 is shaped on puncture procedure handle 1a, and the front end of puncture needle 5 becomes tip-like 5a, and at 6mm pin wall thereafter one STH 5b is arranged, and is channel of blood flow; Protection spring 2a release attitude length and tie-down cable 3 are isometric, and respectively there are a spherical junctions 3a, 3b in tie-down cable 3 two ends.In the leading portion of the protection spring 2a drift angle of having turned back.
As shown in Figure 2, remaining needle flexible pipe 8 and the hypomere constriction mouth 7a suit of puncture needle guiding tube 7 and bonding firm in the following stomidium of keeping somewhere needle stand 9.Puncture needle 5 is adhesively fixed with Paracentesis needle holder 1, and needle body sleeve is equipped with needle point protective casing 4, spring 2a, tie-down cable 3, is docile and obedient the preface compression and is hidden in the Paracentesis needle holder 1, and puncture needle 5 passes sealing-plug 6 and is placed in the remaining needle flexible pipe 8.Standard Luer interface 9a is made in the outer, upper end of the housing 9A of said Needleless barotropic interface, to spin with the transfusion device plug, the hypomere internal diameter of housing 9A is about 1.2 times of epimere internal diameter, the hypomere external diameter of piston 11 is about 1.2 times of epimere external diameter, and adapt to be with housing 9A internal diameter and be slidingly matched, at the fluted 11c in the upper surface of piston 11, respectively there are a ring-shaped groove 11a, 11b in the upper and lower side outside of piston 11, two sealing ring 10a, 10b are embedded in respectively among piston upper and lower side outside groove 11a, the 11b, and are slipper seal with housing 9A inwall; Be shaped on centre bore 11d at piston 11 hypomeres, its space is built-in with spring 2b; Several small pore 12a are arranged on base 12, projection 12b is arranged with retainer spring in base central authorities.Said housing 9A with keep somewhere needle stand 9 and link to each other side by side and be H type structure, housing 9A stage casing sidewall has a hole 9g to be communicated with the formation fluid passage with indwelling needle stand 9 inwall side longitudinal channel 9f arranged side by side.The upper end outer rim of said indwelling needle stand 9 is shaped on into standard Luer interface 9d, to spin with Paracentesis needle holder 1 outer Rule; In the endoporus of keeping somewhere needle stand 9, sidewall near housing 9A is shaped on a longitudinal channel 9f, and with run through housing 9A and link to each other with the side opening 9g that keeps somewhere needle stand, the epimere 9e diameter of keeping somewhere the needle stand endoporus is greater than the stage casing diameter of bore, and keeping somewhere on the needle stand 9 has sealing-plug 6 deadends that are complementary with it between the stage casing.
They are common to constitute the whole of the safety iv cannule with needleless interface positive-pressure closing valve of the present invention.
Fig. 3 is the structural representation of safe puncture needle protector of the present invention; as seen from the figure; puncture needle 5 is fixed in the needle stand 1; side at needle stand 1 is shaped on handle 1a; the front end of needle stand 1 is made tubulose 1d; leading edge at needle stand handle 1a is shaped on breach 1b and fixed claw 1c, can spin fixing with indwelling needle stand 9 upper end outer rim female Luer.Protection spring 2a, tie-down cable 3 and the protective casing 4 of puncture needle protector all are compressed in the pipe 1d of needle stand 1 front end.
As shown in Figure 4; after the vascular puncture success; pull out puncture needle; protection spring 2a can discharge gradually; promoting needle point protective casing 4 moves to the needle point direction; in needle point enters protective casing 4 fully; at this moment; also be that protection spring 2a discharges fully and tie-down cable 3 maximums are unfolded state; because protection spring 2a leading portion has a bending, after needle point enters protective casing 4 disengaging protective casing pin hole 4a, under the distortion power effect of protection spring 2a; protective casing 4 can take place axially to depart from, and makes needle point enter one jiao of protective casing 4 and can not be again by exposing among the protective casing pin hole 4a.
Fig. 5 is the status architecture sketch map of the indwelling phase in blood vessel (when not infusing) of the safety H type iv cannule of the present invention with needleless interface positive-pressure closing valve; As seen from the figure, successfully pull out puncture needle when puncturing after, remaining needle flexible pipe 8 stays and is embedded in the blood vessel, sealing-plug 6 is airtight with puncture needle vestige slit, under spring 2b effect, go up the hypomere inwall by hypomere sealing ring 10a, 10b and housing 9A on the piston 11 and also form sealing, make liquid or the blood can not be excessive.Spring 2b is in release conditions.
Fig. 6 be the safety iv cannule of the present invention with needleless interface positive-pressure closing valve with the sketch map of infusion connector connection status (during transfusion); As seen from the figure, when the need infusion liquid, infusion connector and tight the inserting of female Luer 9a are spun, infusion connector enters in the interface, piston 11 and sealing ring 10a, 10b are moved down, spring 2b is compressed, simultaneously, several apertures 12a on the housing base 12 can get rid of air in the housing, alleviates piston and moves the air pressure of formation.After piston 11 moves down, liquid in the transfusion device plug enters housing 9A inwall side opening 9f along gap between piston 11 upper surface groove 11c, housing 9A stage casing internal diameter and the piston epimere external diameter, and enter through endoporus sidewall raceway groove 9g and to keep somewhere needle stand 9 endoporus and to keep somewhere needle tubing 8, enter human vas.
Transfusion finishes, and pulls out the infusion appliance plug, and along with the elimination of interface pressure, piston 11 is under the responsive to axial force of spring 2b, and moving up rapidly resets.Simultaneously, the aperture 12a on the base can replenish air in housing, alleviates negative pressure.Because piston 11 epimere sealing ring 10a at first contact with housing 9A liquid are sealed, liquid can not be flowed out along housing epimere opening 9b, under the effect of spring 2b, move on piston 11 continues, piston 11 hypomeres and sealing ring 10b can oppress liquid, its side opening 9f along housing 9A is flowed to keep somewhere needle stand 9 endoporus longitudinal channel 9g, and flow to the remaining needle tube side to, the remaining needle flexible pipe is washed, form the malleation plugging action, thereby effectively prevented the backflow of blood.Needleless interface positive-pressure closing valve integral body be returned to Fig. 5 shown in state.
Because application of the present invention when puncture needle is pulled out, can be wrapped in needle tip in the needle point protective casing rapidly automatically, prevents that blood is excessive, thereby avoids medical personnel to be infected and cause the danger of pathophoresis by pricking wound; Because the present invention has needleless interface positive-pressure closing valve, make when liquid infusion end repeatedly, plug liquid plug produces malleation automatically, the liquid extruding to keeping somewhere needle tubing, is rinsed well the needle tubing inner blood, and anti-Trostin M bolt is stifled, thereby do not need to use heparin in sealing, also remove the manual pipe sealing loaded down with trivial details operation of medical personnel, can reduce medical expense, reduced patient's misery.Owing to adopt needleless interface to connect, can overcome the little deficiency of flow that has pin to connect, purposes is expanded, and can avoid the nurse in connection procedure by pricking wound.
Claims (7)
1, a kind of H type safety venous indwelling needle with needleless interface positive-pressure closing valve is made of jointly safety puncture needle, needleless interface positive-pressure closing valve, iv cannule; It is characterized in that: Paracentesis needle holder (1), protection spring (2a), tie-down cable (3), needle point protective casing (4), puncture needle (5) constitute safe puncture needle; Again
Have in the space that housing (9A) and base (12) form: piston (11), sealing ring (10a), (10b), spring (2b) constitutes needleless interface positive-pressure closing valve jointly; Again
Keep somewhere needle stand (9), puncture needle guiding tube (7) remaining needle flexible pipe (8) and sealing-plug (6) and constitute iv cannule; Indwelling needle stand (9) links to each other side by side with housing (9A) and is H type structure.
2, according to the said H type safety venous indwelling needle of claim 1 with needleless interface positive-pressure closing valve, it is characterized in that: said protection spring (2a), tie-down cable (3) and puncture needle protective casing (4) all are sleeved on the outer surface of puncture needle (5), spring retraction protective casing and entering in the pipe (1d) of the leading portion of Paracentesis needle holder fully when compression; The release attitude length and tie-down cable (3) equal in length of protection spring (2a), and slightly be longer than puncture needle (5); Respectively there is a fixing chou (3a) of using at the two ends of tie-down cable (3), and tie-down cable (3) is fixed in the Paracentesis needle holder (1) with an end of protection spring (2a), and the other end is fixed in the puncture needle protective casing (4), and the leading portion of protection spring (2a) has a bending.
3, according to the said H type safety venous indwelling needle with needleless interface positive-pressure closing valve of claim 1, it is characterized in that: the hypomere internal diameter of housing (9A) is more than 1.2 times of epimere internal diameter; The hypomere diameter of piston (11) is more than 1.2 times of epimere diameter, and to go up the hypomere internal diameter corresponding and be free to slide cooperation with housing (9A).
4, according to the said H type safety venous indwelling needle of claim 3 with needleless interface positive-pressure closing valve, it is characterized in that: the upper end face at piston (11) is shaped on a groove (11c), be shaped on ring-shaped groove (11a) in the upper end of piston outer rim, groove is embedded with sealing ring (10a); Piston (11) lower end outer rim is shaped on ring-shaped groove (11b), groove is embedded with sealing ring (10b), and piston (11) depends on sealing ring (10a), (10b) and the slipper seal of housing (9A) inwall in housing (9A).
5, according to the said H type safety venous indwelling needle of claim 1 with needleless interface positive-pressure closing valve, it is characterized in that: the epimere diameter (9e) of keeping somewhere needle stand (9) endoporus is than the stage casing slightly larger in diameter, close housing (9A) side in the endoporus stage casing is shaped on a longitudinal channel (9g) and links to each other with side opening (9f), and sealing rubber plug (6) will be kept somewhere needle stand epimere endoporus (9e) sealing.
6, according to the said H type safety venous indwelling needle of claim 1 with needleless interface positive-pressure closing valve, it is characterized in that: in the space that housing (9A) and base (12) are formed, piston moving up and down (11) is arranged, between piston hypomere endoporus and base (12), spring (2b) is arranged, base (12) center is shaped on projection (12b), is shaped on a plurality of apertures (12a) on the base (12).
7, according to the said H type safety venous indwelling needle of claim 1 with needleless interface positive-pressure closing valve, it is characterized in that: said indwelling needle stand (9) links to each other side by side with housing (9A) and is H type structure, housing (9A) endoporus stage casing sidewall has an aperture (9f) and indwelling needle stand (9) inner chamber arranged side by side to connect, and links to each other with the longitudinal channel (9g) of close housing (9A) side in endoporus stage casing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101925531A CN101269253A (en) | 2007-12-10 | 2007-12-10 | H type safety needle for remaining in vein and artery with non-needle interface positive pressure air-proof valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2007101925531A CN101269253A (en) | 2007-12-10 | 2007-12-10 | H type safety needle for remaining in vein and artery with non-needle interface positive pressure air-proof valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101269253A true CN101269253A (en) | 2008-09-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2007101925531A Pending CN101269253A (en) | 2007-12-10 | 2007-12-10 | H type safety needle for remaining in vein and artery with non-needle interface positive pressure air-proof valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101269253A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934103A (en) * | 2010-09-03 | 2011-01-05 | 柏保东 | Safety-type vein remaining needle |
| CN104665846A (en) * | 2015-03-11 | 2015-06-03 | 张亚平 | Novel safe venipuncture needle |
| CN107115109A (en) * | 2017-05-26 | 2017-09-01 | 徐州医科大学 | Protection type arterial puncture detaining needle |
-
2007
- 2007-12-10 CN CNA2007101925531A patent/CN101269253A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101934103A (en) * | 2010-09-03 | 2011-01-05 | 柏保东 | Safety-type vein remaining needle |
| CN101934103B (en) * | 2010-09-03 | 2012-02-29 | 柏保东 | Safety-type vein retention needle |
| CN104665846A (en) * | 2015-03-11 | 2015-06-03 | 张亚平 | Novel safe venipuncture needle |
| CN107115109A (en) * | 2017-05-26 | 2017-09-01 | 徐州医科大学 | Protection type arterial puncture detaining needle |
| CN107115109B (en) * | 2017-05-26 | 2018-10-19 | 徐州医科大学 | Protection type arterial puncture detaining needle |
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Inventor after: Zhang Yaping Inventor after: Fan Hanjie Inventor after: Wang Lin Inventor after: Wang Dongmei Inventor after: Zhang Yagen Inventor before: Zhang Yaping Inventor before: Zhang Yagen |
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Application publication date: 20080924 |