CN208756689U

CN208756689U - A kind of positive pressure vein remaining needle

Info

Publication number: CN208756689U
Application number: CN201721243710.2U
Authority: CN
Inventors: 廖先强
Original assignee: Hubei Sky Above Hubei And Hunan Pharmaceutical Co Ltd
Current assignee: Hubei Sky Above Hubei And Hunan Pharmaceutical Co Ltd
Priority date: 2017-09-26
Filing date: 2017-09-26
Publication date: 2019-04-19
Anticipated expiration: 2027-09-26

Abstract

The utility model provides a kind of positive pressure vein remaining needle, including three-way connection, hose and needle tubing component, three-way connection one end is equipped with attachment base, attachment base connects needle tubing component by hose, the other both ends of the three-way connection are respectively equipped with positive pressure connector and cone joint, spool and spring are successively arranged between positive pressure connector and attachment base, spool is slidably and sealingly connected with positive pressure connector, both ends of the spring is separately fixed on the spool and attachment base, elastic packing plug is equipped at cone joint port, attachment base is tightly connected by attachment base sealing ring and three-way connection.Positive pressure vein remaining needle provided by the utility model, after the completion of infusion, when external infusion device takes out from positive pressure connector, spring releases stress opening, push spool movement that the second infusion channel volume is made to become smaller, it generates and squeezes the positive pressure that medical fluid in the second infusion channel flows to hose, avoid blood backflow caused by the negative pressure generated when taking out external infusion device, it is stifled that pre- blood-backflow preventing forms bolt into venous detaining needle.

Description

A kind of positive pressure vein remaining needle

Technical field

The utility model relates to medical instruments field, in particular to a kind of positive pressure vein remaining needle.

Background technique

The application of venous detaining needle (vein detained needle) is the preferable method of clinical transfusion, on the one hand can be with Mitigate infant because scalp acupuncture punctures bring pain repeatedly and can be adapted for the adult of long-term infusion.On the other hand also mitigate The workload of clinical nurse.Pain caused by the use of venous detaining needle can be reduced patient due to venipuncture repeatedly and to having an injection Fear, mitigate the impatience of family members, be convenient for clinical application, anxious, critical patient rescue medication reduces the pain of patient Sense, thus venous detaining needle is in wide clinical application.

Currently, needle tubing will be punctured from casing seat after medical staff is punctured using venous indwelling for the vein blood vessel of patient It is extracted in rear end and remaining needle casing, by more soft sleeve portion indwelling in the vein blood vessel of patient, passes through remaining needle Casing is continuously or discontinuously infused to patient.Since the existing infusion pipeline connector being connected with three way type casing is without just Attachment device is pressed, when extracting the Medical Devices such as syringe out from infusion pipeline connector, due to being influenced by factors such as human blood-pressures, Often cause liquid reflux and blood of human body to outflow, causes blood to be flowed out by patient, sleeve pipe causes blood in casing Obstruction or blood clotting, seriously affect use and the infusion safety of venous detaining needle.

Medical staff often will appear the reflux of venous blood using disposable remaining needle in the process, excessive and air enters Problem causes medical staff that will generate a kind of psychological burden when using this kind of product, to affect the treatment to patient There is a kind of disposable remaining needle with protective device to solve existing issue currently on the market in effect, but by The problems such as in its unreasonable structure, there are manufacturing process complexity, and cost is high, inconvenient to use.

Therefore, a kind of disposable remaining needle how is designed, the reflux of venous blood can be improved, excessive and air enters shows As becoming urgent problem to be solved.

Utility model content

The utility model is the drawbacks described above for solving the prior art, provides a kind of positive pressure vein remaining needle.

The utility model provides a kind of positive pressure vein remaining needle, including three-way connection, hose and needle tubing component, the threeway Connector one end is equipped with attachment base, and the attachment base connects the needle tubing component, the other both ends of the three-way connection by hose It is respectively equipped with positive pressure connector and cone joint, the positive pressure connector outer surface is equipped with the outer spiral shell cooperated with external infusion device connector Line is successively arranged spool and spring between the positive pressure connector and attachment base, the spool is slidably and sealingly connected with positive pressure connector, The both ends of the spring is separately fixed on the spool and attachment base, be equipped in the three-way connection penetrate through the cone joint and First infusion channel of attachment base and the second infusion channel of the perforation positive pressure connector and attachment base；The spool is used for Positive pressure is formed by spring force the second infusion channel of mobile compression after the completion of infusion；It is close that elasticity is equipped at the cone joint port Blocking, the elastic packing are equipped with slit beyond the Great Wall, and the attachment base is connected by attachment base sealing ring and three-way connection sealing It connects.

Wherein, the needle tubing component includes needle handle, catheter block, conduit and notch needle tubing, and described catheter block one end is equipped with and leads Pipe, the other end connect the needle handle, are equipped with batching pig in the catheter block, notch needle tubing one end is fixed on the needle handle On, the other end passes through the batching pig and is placed in catheter interior；The catheter block connects the attachment base by the hose.

Wherein, the contact position of the spool both ends and three-way connection is respectively equipped with upper seal and lower seal, described Spool is tightly connected by the upper seal and lower seal and the three-way connection.

Wherein, the protective case for preventing notch needle tubing needle point exposed is equipped on the outside of the conduit.

Wherein, the catheter block is connected with conduit by metal wedge.

Wherein, Needlestick prevention device is equipped in the catheter block, the Needlestick prevention device is set to the right side of the batching pig.

Wherein, the Needlestick prevention device includes deck and the elastic slice that is assemblied on the deck, and the elastic slice is used for The notch needle tubing locks the notch needle tubing when extracting.

Wherein, the notch needle tubing is equipped with blood back slot；For the notch needle tubing after human body extraction, the blood back slot is mobile At to the deck, and it is caught in by the deck.

Wherein, the deck and spool are made of medical macromolecular materials.

Wherein, tongs are equipped on the outside of the hose, the tongs include boss, groove and hook；The boss is used In hose is clamped current limliting with hook cooperation, it is equipped at the boss for making medical fluid slow transit through the groove of hose.

Positive pressure vein remaining needle provided by the utility model, when not being infused, three-way connection passes through elastic packing plug, spool It keeps sealing with attachment base sealing ring, air and impurity is avoided to enter；When being extracted from external infusion device is from cone joint, elasticity Sealing-plug closure seals cone joint, while attachment base sealing ring also functions to sealing function, avoids air and impurity from entering, prevents Only liquid leakage；When taking out from external infusion device is from positive pressure connector, spring releases stress opening, it is mobile to make spool, and then make Second infusion channel volume becomes smaller, and generates and squeezes the normal pressure that medical fluid in the second infusion channel flows to hose, avoids screwing out external The reflux of medical fluid caused by the negative pressure generated when infusion apparatus joint or blood backflow, pre- blood-backflow preventing shape into venous detaining needle It is stifled at bolt；Attachment base sealing ring is tightly connected attachment base and three-way connection simultaneously, and sealed environment avoids venous blood excessive and empty Gas enters.

Detailed description of the invention

Fig. 1 is the structural schematic diagram according to positive pressure vein remaining needle provided by the embodiment of the utility model；

Fig. 2 is the structural schematic diagram according to three-way connection provided by the embodiment of the utility model；

Fig. 3 is according to tongs structural schematic diagram provided by the embodiment of the utility model；

In figure, 1: catheter block；2: metal wedge；3: conduit；4: notch needle tubing；5: batching pig；6: needle stand；7: protective case；8: Deck；9: elastic slice；10: attachment base；11: three-way connection；12: spool；13: upper seal；14: lower seal；15: attachment base is close Seal；16: spring；17: elastic packing plug；18: hose；19: tongs；20: Needlestick prevention device；21: positive pressure connector；22: returning Blood slot；23: boss；24: groove；25: hook；26: the first infusion channels；27: the second infusion channels；28: external screw thread；29: circle Taper joint.

Specific embodiment

It is practical new below in conjunction with this to keep the objectives, technical solutions, and advantages of the embodiments of the present invention clearer Attached drawing in type embodiment, is explicitly described the technical scheme in the embodiment of the utility model, it is clear that described reality Applying example is the utility model a part of the embodiment, instead of all the embodiments.Based on the embodiments of the present invention, ability It is practical new to belong to this for domain those of ordinary skill every other embodiment obtained without making creative work The range of type protection.

Fig. 1 is the structural schematic diagram according to positive pressure vein remaining needle provided by the embodiment of the utility model, and Fig. 2 is according to this The structural schematic diagram for the three-way connection that utility model embodiment provides, as depicted in figs. 1 and 2, which includes Three-way connection 11, hose 18 and needle tubing component, described 11 one end of three-way connection are equipped with attachment base 10, and the attachment base 10 passes through soft Pipe 18 connects the needle tubing component, and the other both ends of the three-way connection 11 are respectively equipped with positive pressure connector 21 and cone joint 29, 21 outer surface of positive pressure connector is equipped with the external screw thread 28 cooperated with external infusion device connector, the positive pressure connector 21 and attachment base Spool 12 and spring 16 are successively arranged between 10, the spool 12 is slidably and sealingly connected with positive pressure connector 21,16 liang of the spring End is separately fixed on the spool 12 and attachment base 10, is equipped in the three-way connection and is penetrated through the cone joint and attachment base 10 the first infusion channel 26 and the second infusion channel 27 of the perforation positive pressure connector 21 and attachment base 10；The spool 12 For being formed positive pressure by spring force the second infusion channel 27 of mobile compression after the completion of infusion；At 29 port of cone joint Equipped with elastic packing plug 17, the elastic packing plug 17 be equipped with slit, the attachment base 10 by attachment base sealing ring 15 with The three-way connection 11 is tightly connected.

Specifically, as depicted in figs. 1 and 2, the attachment base 10 of 11 one end of three-way connection connects needle tubing component by hose 18, The other both ends of three-way connection 19 are respectively equipped with positive pressure connector 21 and cone joint 29, in the present embodiment, when not being infused, and three-way connection 11 keep sealing by elastic packing plug 17, spool 12 and attachment base sealing ring 15, and air and impurity is avoided to enter；When external defeated When liquid device is infused from cone joint 29, infusion apparatus squeezes into cone joint 29 by the slit on elastic packing plug 17, then medicine Liquid flows into hose 18 by the first infusion channel and enters needle tubing component by hose 18, most flows into venous blood through needle tubing component afterwards Pipe；After the completion of infusion, external infusion device is extracted from elastic packing plug 17, and the closure of elastic packing plug 17 seals cone joint, Attachment base sealing ring 15 also functions to sealing function simultaneously, avoids air and impurity from entering, prevents liquid leakage；In three-way connection 11 Both ends positive pressure connector 21 and cone joint 29 is respectively set, it can be achieved that simultaneously carry out two kinds of medical fluids input.

Further, as shown in Fig. 2, when being infused from external infusion device is from positive pressure connector 21, the infusion of external infusion device Connector, which is connected through a screw thread, screws in positive pressure connector 21, and external infusion device pushes spool 12, and then makes the spring connecting with spool 12 16 forced compressions, the medical fluid in external infusion device flows into attachment base 10 by the second infusion channel 27, and enters from attachment base 10 Hose 18 flows through hose 18 and enters needle tubing component, most flows into vein blood vessel through needle tubing component afterwards；It is external defeated after the completion of infusion Liquid device takes out from spool 12, and spring 16 releases stress opening, and it is mobile to make spool 12, and then becomes 27 volume of the second infusion channel It is small, it generates and squeezes the normal pressure that medical fluid in the second infusion channel 27 flows to hose 18, production when avoiding screwing out external infusion device connector The reflux of medical fluid caused by raw negative pressure or blood backflow, it is stifled that pre- blood-backflow preventing forms bolt into venous detaining needle；And no It needs heparin in sealing etc. to operate, makes the more simplified convenience of operation, improve the working efficiency of medical staff；Attachment base sealing ring 15 simultaneously It is tightly connected attachment base 10 and three-way connection 11, sealed environment avoids venous blood excessive and air enters.

In one embodiment, the needle tubing component includes needle handle 6, catheter block 1, conduit 3 and notch needle tubing 4, described to lead 1 one end of tube socket is equipped with conduit 3, and the other end connects the needle handle 6, is equipped with batching pig 5, the notch needle tubing 4 in the catheter block 1 One end is fixed on the needle handle 6, and the other end passes through the batching pig 5 and is placed in inside conduit 3；The catheter block 1 passes through described Hose 18 connects the attachment base 10.

Specifically, in the present embodiment, external infusion device is infused from positive pressure connector, external infusion device and 21 spiral shell of positive pressure connector Line connection, external infusion device, which squeezes spool, compresses spring stress, and medical fluid flows through the entrance of hose 18 by the second infusion channel and leads Tube socket 1 finally flows through conduit 3 and flows into vein blood vessel；After the completion of infusion, external infusion device screws out from spool 12, spring 16 Opening is released stress, it is mobile to make spool 12, and then 27 volume of the second infusion channel is made to become smaller, generates and squeezes the second infusion channel 27 Interior medical fluid flows to the normal pressure of hose 18, when avoiding screwing out external infusion device connector the reflux of medical fluid caused by the negative pressure that generates or Blood backflow, it is stifled that pre- blood-backflow preventing forms bolt into venous detaining needle.

In one embodiment, end face is an inclined-plane at spool 12 and external interface, prevent external infusion device connector with Sliding is generated when positive pressure connector 21 connects.

In one embodiment, the contact position of 12 both ends of spool and three-way connection 11 is respectively equipped with upper seal 13 With lower seal 14, the spool 12 is connected by the upper seal 13 and lower seal 14 and the three-way connection 11 sealing It connects.When external infusion device is extracted from positive pressure connector 21, upper seal 13, lower seal 14 and attachment base sealing ring 15 rise simultaneously To sealing function, liquid leakage is prevented, air and bacterium is avoided to enter three-way connection 11.

In one embodiment, the protective case 7 for preventing 4 needle point of notch needle tubing exposed is equipped on the outside of the conduit 3.Such as Shown in Fig. 1, the length of protective case 7 is extended at 4 1~3cm of left end of notch needle tubing, and protective case 7 is arranged on the outside of conduit 3, can be with Medical staff is protected not stabbed by the notch needle tubing in conduit.

In one embodiment, the catheter block 1 and conduit 3 are connected by metal wedge 2.Prevent the medical fluid in catheter block 1 During inflow catheter 3, there is the phenomenon that liquid leakage.

In one embodiment, it is equipped with Needlestick prevention device 20 in the catheter block 3, the Needlestick prevention device 20 is set to institute State the right side of batching pig 5.Needlestick prevention device 20 is set in venous detaining needle, and medical staff is pulling out needle after puncturing to patient During, notch needle tubing 4 is blocked by Needlestick prevention device 20, effectively avoids stabbing medical staff and causing cross-infection, is ensured The personal safety of medical staff, patient and waste disposal workers, substantially reduces the risk of infection, improves venous detaining needle Safety.

In one embodiment, the Needlestick prevention device 20 includes deck 8 and the elastic slice 9 being assemblied on the deck, The elastic slice 9 is for cooperating deck 8 to lock the notch needle tubing 4.As shown in Figure 1, the Needlestick prevention device 20 is by deck 8 and assembly Elastic slice 9 on deck is constituted.In use, medical staff carries out anti-venous indwelling needle after correctly puncturing to patient, Conduit 3 is introduced into the vein blood vessel of human body, needle stand 6 is then pinched and notch needle tubing 4 is extracted from human vein blood vessel, conduit 3 It is just trapped in the vein blood vessel of human body, when notch needle tubing 4 is moved to the deck 8 of Needlestick prevention device 20, deck 8 blocks notch Needle tubing, while the elastic slice 9 on Needlestick prevention device 20 blocks the needle point of notch needle tubing 4, and Needlestick prevention device 20 is fixed on notch At the needle point of needle tubing 4, then the notch needle tubing 4 with Needlestick prevention device 20 is pulled out out of catheter block 1, at this time notch needle tubing 4 Needle tip be completely hidden in Needlestick prevention device 20, avoid notch needle tubing 4 and stab medical staff and cause cross-infection, mention The high safety of venous detaining needle.

In one embodiment, the notch needle tubing is equipped with blood back slot 22；The notch needle tubing is after human body extraction, institute It states blood back slot 22 to be moved at the deck 8, and by 8 clamping of deck.

Specifically, medical staff carries out anti-venous indwelling needle after correctly puncturing to patient, and conduit 3 is introduced into Then the vein blood vessel of human body pinches needle stand 6 and notch needle tubing 4 is extracted from human vein blood vessel, conduit 3 is trapped in the quiet of human body Arteries and veins is intravascular.When the blood back slot 22 on notch needle tubing 4 is moved to the deck 8 of Needlestick prevention device 20, deck 8 enters blood back slot Elastic slice 9 in 22, while on Needlestick prevention device 20 blocks the needle point of notch needle tubing 4, and Needlestick prevention device 20 is fixed on notch At the needle point of needle tubing 4.Then the notch needle tubing 4 with Needlestick prevention device 20 is pulled out out of catheter block 1, at this time notch needle tubing 4 Needle tip be just completely hidden in Needlestick prevention device 20, effectively prevent notch needle tubing 4 and stab medical staff and cause to intersect Infection, improves the safety of venous detaining needle.

In one embodiment, the deck 8 and spool 12 are made of medical macromolecular materials.Medical macromolecular materials are Refer to that source includes natural biological to manufacture human body viscera, vitro in organ, pharmaceutical dosage form and the polymer material of medical instrument High molecular material and synthesising biological high molecular material.Natural medical polymer materials derive from naturally, including cellulose, crust Element, hyaluronic acid, collagen, gelatin and sodium alginate etc.；Synthesis of medical high molecular material is the artificial conjunction by chemical method At be used for medical high molecular material, it is currently used have polyurethane, silicon rubber, polyester fiber, polyvinylpyrrolidone, Polyether-ether-ketone, polymethyl methacrylate, polyvinyl alcohol, polylactic acid, polyethylene etc..Medical macromolecular materials are chiefly used in human body, It is directly related to the life and health of people, there is good safety and adaptability.

In one embodiment, tongs 19 are equipped on the outside of the hose 18, the tongs 19 include boss 23, groove 24 and hook 25；The boss 23 is used to that hose 18 to be clamped current limliting with the cooperation of hook 25, is equipped at the boss 23 for making Medical fluid slow transits through the groove 24 of hose 18.As shown in Figure 1, hose 18 is equipped with tongs 19, which is incomplete Enclosed construction, Fig. 3 are according to tongs structural schematic diagram provided by the embodiment of the utility model, as shown in figure 3, the tongs Including boss 23, groove 24 and hook 25.When patient needs to suspend infusion, merges tongs 19, stop the medical fluid in hose Fluid stopping is dynamic, when patient needs to restore infusion, opens tongs 19, medical fluid is made to restore flowing.

In one embodiment, tongs 19 are equipped with multiple hooks 25.Preferably, 3 hooks are equipped in the present embodiment. As shown in figure 3, tongs 19 are equipped with 3 hooks 25, and when tongs 19 are merged at different hooks 25, the clamping of tongs 19 Degree is different, so that flow velocity of the medical fluid in hose 18 is different.It, can by merging tongs 19 at different hooks 25 Control flow velocity of the medical fluid in hose 18.

Positive pressure vein remaining needle provided by the embodiment of the utility model, including three-way connection, hose and needle tubing component, threeway The attachment base of connector one end connects needle tubing component by hose, and the other both ends of three-way connection are respectively equipped with positive pressure connector and circular cone connects Head, when not being infused, three-way connection keeps sealing by elastic packing plug, spool and attachment base sealing ring, avoids air and impurity Into；When extracting from external infusion device is from cone joint, elastic packing plug closure seals cone joint, while attachment base is close Seal also functions to sealing function, avoids air and impurity from entering, prevents liquid leakage；When external infusion device takes from positive pressure connector When out, spring releases stress opening, it is mobile to make spool, and then the second infusion channel volume is made to become smaller, and generates and squeezes the second infusion Medical fluid flows to the normal pressure of hose in channel, avoids the reflux of medical fluid caused by the negative pressure generated when screwing out external infusion device connector Or blood backflow, it is stifled that pre- blood-backflow preventing forms bolt into venous detaining needle；Attachment base sealing ring makes attachment base and threeway simultaneously Joint sealing connection, sealed environment avoids venous blood excessive and air enters.

It should be noted that, in this document, relational terms such as first and second and the like are used merely to a reality Body or operation are distinguished with another entity or operation, are deposited without necessarily requiring or implying between these entities or operation In any actual relationship or order or sequence.Moreover, the terms "include", "comprise" or its any other variant are intended to Non-exclusive inclusion, so that the process, method, article or equipment including a series of elements is not only wanted including those Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or equipment Intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that There is also other identical elements in process, method, article or equipment including the element.Term " on ", "lower" etc. refer to The orientation or positional relationship shown be based on the orientation or positional relationship shown in the drawings, be merely for convenience of description the utility model and Simplify description, rather than the device or element of indication or suggestion meaning must have a particular orientation, with specific orientation construction And operation, therefore should not be understood as limiting the present invention.Unless otherwise clearly defined and limited, term " installation ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally connect It connects；It can be mechanical connection, be also possible to be electrically connected；It can be directly connected, can also indirectly connected through an intermediary, it can To be the connection inside two elements.For the ordinary skill in the art, can understand as the case may be above-mentioned The concrete meaning of term in the present invention.

Finally, it should be noted that above embodiments are only to illustrate the technical solution of the utility model, rather than its limitations； Although the utility model is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: It can still modify to technical solution documented by foregoing individual embodiments, or carry out to part of technical characteristic Equivalent replacement；And these are modified or replaceed, each embodiment of the utility model that it does not separate the essence of the corresponding technical solution The spirit and scope of technical solution.

Claims

1. a kind of positive pressure vein remaining needle, which is characterized in that described including three-way connection (11), hose (18) and needle tubing component Three-way connection (11) one end is equipped with attachment base (10), and the attachment base (10) connects the needle tubing component, institute by hose (18) The other both ends for stating three-way connection (11) are respectively equipped with positive pressure connector (21) and cone joint (29), and the positive pressure connector (21) is outside Surface is equipped with the external screw thread (28) cooperated with external infusion device connector, between the positive pressure connector (21) and attachment base (10) successively Equipped with spool (12) and spring (16), the spool (12) is slidably and sealingly connected with positive pressure connector (21), the spring (16) two End is separately fixed on the spool (12) and attachment base (10), is equipped in the three-way connection and is penetrated through the cone joint and company The first infusion channel (26) of joint chair (10) and the second infusion channel of the perforation positive pressure connector (21) and attachment base (10) (27)；Elastic packing plug (17) are equipped at cone joint (29) port, the elastic packing plug (17) is equipped with slit, institute Attachment base (10) are stated to be tightly connected by attachment base sealing ring (15) and the three-way connection (11).

2. positive pressure vein remaining needle according to claim 1, which is characterized in that the needle tubing component includes needle handle (6), leads Tube socket (1), conduit (3) and notch needle tubing (4), described catheter block (1) one end are equipped with conduit (3), and the other end connects the needle handle (6), batching pig (5) are equipped in the catheter block (1), described notch needle tubing (4) one end is fixed on the needle handle (6), another End is placed in conduit (3) inside across the batching pig (5)；The catheter block (1) connects the connection by the hose (18) Seat (10).

3. positive pressure vein remaining needle according to claim 1, which is characterized in that spool (12) both ends and three-way connection (11) contact position is respectively equipped with upper seal (13) and lower seal (14), and the both ends of the spool (12) pass through upper sealing It encloses (13) and lower seal (14) and the three-way connection (11) is tightly connected.

4. positive pressure vein remaining needle according to claim 2, which is characterized in that be equipped on the outside of the conduit (3) for preventing The only exposed protective case (7) of notch needle tubing (4) needle point.

5. positive pressure vein remaining needle according to claim 2, which is characterized in that the catheter block (1) and conduit (3) pass through Metal wedge (2) connection.

6. positive pressure vein remaining needle according to claim 2, which is characterized in that be equipped with anti-needle in the catheter block (1) and pierce Device (20), the Needlestick prevention device (20) are set to the right side of the batching pig (5).

7. positive pressure vein remaining needle according to claim 6, which is characterized in that the Needlestick prevention device (20) includes deck (8) and the elastic slice (9) that is assemblied on the deck.

8. positive pressure vein remaining needle according to claim 7, which is characterized in that the notch needle tubing (4) is equipped with blood back Slot (22)；After human body extraction, the blood back slot (22) is moved at the deck (8) the notch needle tubing (4), and described Deck (8) is caught in.

9. positive pressure vein remaining needle according to claim 8, which is characterized in that the deck (8) and spool (12) are by curing It is made of high molecular material.

10. positive pressure vein remaining needle according to claim 1, which is characterized in that be equipped with sealing on the outside of the hose (18) It presss from both sides (19), the tongs (19) include boss (23), groove (24) and hook (25)；The boss (23) is used for and hook (25) hose (18) are clamped current limliting by cooperation, are equipped at the boss (23) for making medical fluid slow transit through the groove of hose (24)。