CN209221184U - Easy-to-puncture sterile anti-backflow remaining needle - Google Patents

Abstract

The utility model provides an aseptic anti-reflux who easily punctures keeps somewhere needle, its essential element include elastic webbing, main entrance, keep somewhere hose, puncture steel needle, be located the fixed subassembly of main entrance both sides, shutoff core and shutoff core pipe, the front end of keeping somewhere the hose is equipped with the transition ring along the gradual attenuation of infusion direction, the inner wall of transition ring is the round platform shape, and can wrap up the end of the conical needle point of puncture steel needle, appears keeping somewhere the phenomenon that the hose returns when preventing to puncture. The plugging core is positioned in the elastic band and can freely enter and exit the indwelling hose along with the stretching and natural retraction of the elastic band so as to enable the indwelling hose to be in a plugged or opened state, and the plugging core catheter is positioned in the main channel and used for guiding the plugging core. The utility model discloses an aseptic anti palirrhea needle of keeping somewhere can be under aseptic encapsulated situation the whole hose of keeping somewhere of shutoff, thoroughly stops blood return and blood coagulation phenomenon.

Description

A kind of sterile anti-reflux remaining needle for being easy to puncture

Technical field

The utility model relates to technical field of medical equipment, and in particular to a kind of sterile anti-reflux indwelling for being easy to puncture Needle.

Background technique

Remaining needle is the common infusion device of one of clinical application.It is punctured by single, and in subsequent treatment It is interior to repeatedly use the mode being infused, the pain of sufferer and the workload of medical staff are alleviated, while also reducing The probability of happening of the accident of puncture.

Since its Preserving time is on sufferer body, and its flexible needle tube portion is directly contacted with the blood of sufferer.Therefore, The flexible needle tubing of remaining needle usually using Teflon etc. there is the material of biocompatibility to make.There is scholar studies have shown that protecting It holds in the piercing portions sterile and clean situation of surrounding skin relatively, as long as no plugging and leakage, the indwelling of remaining needle occurs Time was up to 7 days or more.Longest indwelling time is 27 days in clinical observation record.But in fact, infusion tempus intercalare, pole Be easy to appear blood backflow and as the blood coagulation of draining blood and caused by plugging phenomenon, thus make remaining needle lose indwelling meaning Justice.

In addition, remaining needle is also widely present the problem that can not be fixed for a long time in use.Such issues that main table Slight illness is more unbearably by during patient largely perspires or needs persistent movement now.In most typical such as obstetrical ward, Childbirth is simultaneously one of mode of operation very universal at present using the assisted delivery process of the defeated oxytocins of remaining needle.Puerpera is dividing Severe pain is endured during childbirth, is perspired with a large amount of, and needs to continue to exert oneself.In this case, conventional pad pasting is solid Determining mode can only often maintain one or two hour, and medical staff is caused to need frequently to retighten, and even replacement is stayed Set needle.

Remaining needle in the prior art is broadly divided into two kinds of A type (style of opening) and Y type (enclosed type).Wherein A type remaining needle Tube sealing is carried out frequently with tube-sealing solution when being infused interval, mode of operation is to inject tube-sealing solution in calparine cap by syringe, The withdraw of the needle when injecting tube-sealing solution prevents from causing swabbing action and blood back to blood when the withdraw of the needle, reuses folder after having injected tube-sealing solution Sub-folder lives remaining needle extension tube.But the mode of operation that marginal not penetrates the side withdraw of the needle is excessively complicated, and easily makes a fault and cause blood back.

Non-return for Y type remaining needle and tube sealing research are more, such as flow-stopping clip or current limiter is arranged in connecting tube The anti-return blood of mode, but this method is similar with the tube sealing method of A type remaining needle, can not solve injection tube-sealing solution excessively complexity Problem.

Chen Dajin etc. devises a kind of remaining needle (CN105935460A) with fluid stopping switch, passes through the spiral of dc switch The capsule pipe 8 for promoting (closed state) compressing soft needle upstream of indwelling, the fluid path realization cut off between indwelling hose and outside stop Stream.The fluid stopping switch of the program is substantially still a kind of flow-stopping clip, but its fluid stopping point is more forward compared to conventional flow-stopping clip, Blood can not backflow into remaining needle needle body.But the program, which needs to rely on, carrys out fluid stopping to the compressing of capsule pipe, the spiral shell outside needle body Unscrewing, which is closed, to be needed to reserve outside fixed pad pasting, and in order to screw, and remaining needle size is bigger, results in more complicated fixation Problem, also, the program does not still account for the problem of blood backflow enters indwelling hose.

The puncture principle of remaining needle is to puncture vascular wall by puncture needle, then indwelling hose is driven to enter venous blood Pipe.But the considerations of existing remaining needle is for indwelling safety, indwelling hose are softer flexible material, when puncturing, are stayed The diameter for setting hose and puncture needle has differences, and after causing the needle point of steel needle to be pierced into blood vessel, indwelling hose still will receive blood vessel The resistance of wall, thus generate indwelling hose relative to the retraction of steel needle or move back pipe phenomenon, it is larger to the damage of vascular wall.

Summary of the invention

For the above-mentioned technical problems in the prior art, the utility model provide it is a kind of be easy to puncture sterile anti-return Flow remaining needle.By improving to indwelling hose, when so that puncturing again, cunning will not be generated between indwelling hose and puncture needle Dynamic displacement, the phenomenon that having prevented indwelling hose retraction and moved back pipe, while the remaining needle is easy to be bonded indwelling position and fixes, and energy Enough prevent blood reflux from entering indwelling hose, to thoroughly prevent the formation of blood coagulation, thrombus.

" front end " is used in the utility model, " end ", " tail end ", " downstream " etc. limits.When wherein, to be infused, medicine The dynamic direction of liquid stream is front end and downstream.

To achieve the above object, the utility model provides the following technical solutions.

A kind of sterile anti-reflux remaining needle for being easy to puncture, including needle body component 1, fixation kit 2, piercing assembly 3 and envelope Tube assembly 4.Wherein needle body component includes main channel 11, infusion connector 12, indwelling hose 13, soft rubber stopper 14,13 He of indwelling hose Soft rubber stopper 14 is respectively fixedly disposed at the both ends of main channel 11, and infusion connector 12 is arranged on the side wall of main channel 11 to be connected with outside It is logical；Fixation kit 2 includes the multiple fins being fixed on 11 lateral wall of main channel, and the side of the fin is coated with gluing Agent, gluing side are equipped with covering, and when use, which removes directly attach after covering, is fixed at indwelling；Piercing assembly 3 includes The fixed plug of puncture needle 31, puncture needle 32, end cap 33, needle handle (not shown), steel needle casing (not shown), steel needle 31 tail end is fixed on the fixed plug 32 of puncture needle, and the fixed plug 32 of puncture needle is embedded in end cap 33, and the fixation of end cap 33 is set The tail end in steel needle casing is set, the steel needle casing is slidably set in the outside of main channel 11, and can be from main channel 11 It removes；The tube sealing component 4 includes elastic webbing 42, blocks core 44, blocks core conduit 41, sealing diaphragm 47, the elastic webbing 42 One end is fixed on the side wall of main channel 11, and the other end can be stretched freely, internal to have a hollow groove 43, main channel 11 Side wall on be provided with the circular hole 48 being connected to 43 one end of hollow groove, the closure core 44 is solid flexible material, is closed It is arranged in the hollow groove 43 of the elastic webbing 42, the closure core 44 can protrude into master by the circular hole 48 on 11 side wall of main channel In channel 11, the circular hole 48 is located at the connection of the side in main channel 11 and blocks core conduit 41, described to block the another of core conduit 41 One end connects the end of indwelling hose 13, and when 42 natural shrinking of elastic webbing, closure core 44 can be passed through by retraction elastic force and be blocked Core conduit 41 enters in indwelling hose 13, prevents blood reflux, when elastic webbing 42 stretches, blocks core 44 by from indwelling hose 13 Middle extraction, open infusion channel.The closure core conduit 41 is close to the side of indwelling hose 13 equipped with strip-shaped hole 45 and for supporting By the endless belt of the not aperture of 13 end of indwelling hose, enter indwelling hose convenient for medical fluid, blocks core conduit 41 close to soft rubber stopper 14 sides are provided with the circular open 49 passed through for puncture needle 31.

Preferably, the closure core conduit 41 includes straight pipe 411 and arc pipeline section 412, wherein the one of arc pipeline section 412 End is connected to the top (close to the side of soft rubber stopper) of straight pipe 411, and the other end is connected with the circular hole 48 on 11 side wall of main channel It is logical；The lower section (i.e. close to the side of indwelling hose) of straight pipe 411 is puncture needle 31 and the common-use tunnel for blocking core 44, straight tube The upper section of section 411 is the channel of puncture needle 31, and arc pipeline section 412 is the channel for blocking core 44；The sealing diaphragm 47 is located at In arc pipeline section 412.

Preferably, the distal end (one end far from main channel) of the hollow groove 43 is equipped with fixed structure 46, so as to make Core 44 must be blocked and be extracted or be pushed into indwelling hose 13 with the stretching or retraction of elastic webbing 42.

Preferably, the fixed structure 46 is the fixing groove bigger compared to the rest part diameter of hollow groove 43, described The tail end for blocking core 44 has one section of larger diameter section to match with the fixing groove, to make the tail end for blocking core 44 by card In fixing groove.

Preferably, the closure core 44 is arranged to, and when the elastic webbing 42 bounces back naturally, the front end for blocking core 44 is proper Sports-like to indwelling hose 13 opening, thus by entire indwelling hose 13 blood and medical fluid be discharged, closure entirely stay Set hose 13；And when the elastic webbing 42 is stretched to maximum length, the front end for blocking core 44, which remains in, blocks core conduit In the 41 arc pipeline section 412 and downstream of sealing diaphragm 47, to prevent from blocking core 44 from closure core conduit 41 and sealing diaphragm Deviate from 47 aperture.

Preferably, a side flap of elastic webbing 42 and fixation kit 2 is closed on and is arranged in parallel, and the distal end of elastic webbing 42 is (remote Side from main channel) it is provided with fixed part 50, it is provided on the side flap closed on elastic webbing 42 and the fixed part 50 The facies posterior hepatis to match, the facies posterior hepatis are radially extended along the side flap, so that the elastic webbing 42 is in natural shrinking and most It can be fixed by being formed between fixed part 50 and facies posterior hepatis in the entire scope stretched greatly.

Preferably, the fixed part 50 is hook or adhesive sticker or velcro.

Preferably, the fin of the fixation kit 2 is flexible material, and the covering of glue applied side is stiff sheet, fin Gluing side is adhered on the stiff sheet, so that elastic webbing 42 can keep tensional state when unused, makes to seal Stifled core 44 exits the straight pipe 411 for blocking core conduit 41, concedes 411 channel of straight pipe for puncture needle 31.

Preferably, the front end (one end far from remaining needle) of the indwelling hose 13 has thinner compared to rest part Transition rings 15 are gradually shunk to puncture needle on the direction close to puncture needle 31, so that the bus of arc line shaped is showed, In order to which indwelling hose enters blood vessel with puncture needle 31, while damage when reducing puncture to vascular wall.

Preferably, the elastic webbing 42 is the foldable material of silicone rubber material or interior packet spring.

Preferably, the remaining needle is using aseptic packaging, such as sterile plastic packaging bag etc..

Preferably, the diameter for blocking core 44 is less than the internal diameter of indwelling hose 13, to prevent from drawing again after closure The swabbing action to blood is formed during stretching elastic webbing 42.

Preferably, the straight pipe top for blocking core conduit 41 is equipped with soft rubber stopper, after puncture needle 31 exits, medical fluid It cannot enter from the circular open 49 on top for blocking core conduit 41.

Preferably, strip-shaped hole 45, and the closure core are offered on the whole straight pipe for blocking core conduit 41 Fixation is pasted with filter membrane on the inner wall of conduit 41, enters in main channel 11 to prevent haemocyte from passing through strip-shaped hole 45.

Preferably, the plugging gap 51 can be the conduit for being provided with and blocking 44 surface of core, thus extracting the envelope out When stifled core 44, can by the way of synchronizing and injecting tube-sealing solution or medical fluid, make tube-sealing solution or medical fluid from the plugging gap 51 into Enter blood vessel, balance extraction blocks the negative pressure generated when core 44, prevents from generating swabbing action to blood.

The specifically used method of the sterile anti-reflux remaining needle described in the utility model for being easy to puncture is as follows: dismantling packaging Sterile plastic packaging bag, take out remaining needle, at this time the fin of fixation kit 2 answer it is intact be adhered on stiff sheet, elastic webbing 42 are in tensional state, and are fixed on the facies posterior hepatis on a side flap by the fixed part 50 of its distal end, and puncture needle 31 plugs Inside indwelling hose 13, and the tip portion of the puncture needle 31 is exposed outside indwelling hose；According to conventional remaining needle Piercing step is punctured, and extracts steel needle out after the completion of puncturing；Two side flaps of fixation kit 2 are torn up from both ends, are disengaged it from It takes stiff sheet after stiff sheet away, fin glue applied side is attached at human body indwelling, at this point, elastic webbing 42 is still within stretching State；Sterile film is attached at the point of puncture of indwelling hose 13 and skin；According to the mode of operation liquid medicine injection of conventional remaining needle； When injecting liquid drug need to interrupt, fixed part 50 and facies posterior hepatis are separated, elastic webbing 42 is made slowly to bounce back, bounces back to after nature and again will Fixed part 50 is fixed in conjunction with facies posterior hepatis, is optionally injected tube-sealing solution from infusion connector 12 at this time and is sealed with further improvement Pipe effect.

The utility model is introduced directly into indwelling hose 13 by that will block core 44, so that anti-Hemostatic Oral Liquid enters indwelling hose 13 In main channel 11, blood backflow is blocked, so that no matter equal in the main channel of remaining needle 11 or in indwelling hose 13 It is not in blood coagulation or thrombus, meanwhile, blocking core conduit 41 by setting realizes the guidance to flexible blockage core 44, can It is enough smoothly to pass in and out indwelling hose 13, and the elastic webbing 42 of integral hermetic setting will then block core 44 and be completely enclosed within remaining needle Inside avoids during pull blocks core and brings bacterium into.In addition, in actual use, it is also an option that the collocation of property is normal Tube-sealing solution is advised with the plugging gap 51 between further filling closure core 44 and indwelling hose 13, improves plugging effect.This reality Fixation kit is carried with novel remaining needle, the fixation kit is wholely set with remaining needle, compared to routine without fixation kit Remaining needle for can be effectively improved during indwelling due to the factors such as patient's twisting caused by remaining needle misplace, and then pull out Out the phenomenon that indwelling hose 13.

Detailed description of the invention

For the particular technique content for further disclosing the utility model, with reference to embodiments and attached drawing is described in detail, In:

Fig. 1 is the overall schematic of the sterile anti-reflux remaining needle described in the utility model for being easy to puncture；

Fig. 2 is the schematic diagram for blocking core conduit；

Fig. 3 is the schematic diagram of elastic webbing；

Fig. 4 is the cross-sectional view of elastic webbing；

Fig. 5 is the partial enlarged view of region A in Fig. 1；

Fig. 6 is the partial enlarged view of region B in Fig. 1；

Fig. 7 is schematic diagram of the indwelling hose under sealed condition；

Fig. 8 is the schematic diagram that transition rings 15 wrap up puncture needle.

In figure: needle body component 1, fixation kit 2, piercing assembly 3, tube sealing component 4, main channel 11, infusion connector 12, indwelling Hose 13, soft rubber stopper 14, transition rings 15, puncture needle 31, puncture needle fixed plug 32, block core conduit 41, straight tube at end cap 33 Section 411, arc pipeline section 412, elastic webbing 42, hollow groove 43, block core 44, strip-shaped hole 45, fixed structure 46, sealing diaphragm 47, Circular hole 48, circular open 49, fixed part 50, plugging gap 51.

Specific embodiment

The technical solution of the utility model is further described with reference to embodiments.

As shown in figures 1 to 6, a kind of sterile anti-reflux remaining needle for being easy to puncture, including needle body component 1, fixation kit 2, wear Pierce component 3 and tube sealing component 4.Wherein needle body component includes main channel 11, infusion connector 12, indwelling hose 13, soft rubber stopper 14, is stayed It sets hose 13 and soft rubber stopper 14 is respectively fixedly disposed at the both ends of main channel 11, the side wall of main channel 11 is arranged in infusion connector 12 Above and with outside it is connected to；Fixation kit 2 includes multiple fins for being fixed on 11 lateral wall of main channel, and the one of the fin Side is coated with adhesive, and gluing side is equipped with covering, and when use, which removes directly attach after covering, is fixed at indwelling；It punctures Component 3 fixes plug 32, end cap 33, needle handle (not shown), steel needle casing (in figure not including puncture needle 31, puncture needle Show), the tail end of steel needle 31 is fixed on the fixed plug 32 of puncture needle, and the fixed plug 32 of puncture needle is embedded in end cap 33, is held Cap 33 is fixed at the tail end of steel needle casing, and the steel needle casing is slidably set in the outside of main channel 11, and can be from It is removed on main channel 11；The tube sealing component 4 includes elastic webbing 42, blocks core 44, blocks core conduit 41, sealing diaphragm 47, institute It states 42 one end of elastic webbing to be fixed on the side wall of main channel 11, the other end can be stretched freely, internal to have a hollow groove 43, the circular hole 48 being connected to 43 one end of hollow groove is provided on the side wall of main channel 11, the closure core 44 is solid flexible material Matter is closed in the hollow groove 43 that the elastic webbing 42 is arranged in, and the closure core 44 can be by 11 side wall of main channel Circular hole 48 protrudes into main channel 11, and the circular hole 48 is located at the connection of the side in main channel and blocks core conduit 41, the closure core The end of the other end connection indwelling hose 13 of conduit 41, when 42 natural shrinking of elastic webbing, blocking core 44 can be by retraction bullet Power pass through block core conduit 41 enter indwelling hose 13 in, prevent blood reflux, when elastic webbing 42 stretch when, block core 44 by from It is extracted out in indwelling hose 13, open infusion channel.The closure core conduit 41 is logical equipped with medical fluid close to the side of indwelling hose 13 Road and endless belt for the not aperture against 13 end of indwelling hose enter indwelling hose convenient for medical fluid, block core conduit 41 14 side of soft rubber stopper is provided with the circular open 49 passed through for puncture needle 31.

Preferably, the closure core conduit 41 includes straight pipe 411 and arc pipeline section 412, wherein the one of arc pipeline section 412 End is connected to the middle and upper part (close to the side of soft rubber stopper) of straight pipe 411, the other end and 48 phase of circular hole on 11 side wall of main channel Connection；The lower section (i.e. close to the side of indwelling hose) of straight pipe 411 is the common-use tunnel of puncture needle 31 and closure core 44, directly The upper section of pipeline section 411 is the channel of puncture needle 31, and arc pipeline section 412 is the channel for blocking core 44；The sealing diaphragm 47 is set In arc pipeline section 412.The lower part of the straight pipe 411 and the inner sidewall of main channel 11 are to against the medicine liquid channel opens up On the side wall of 411 lower part of straight pipe.

Preferably, the medicine liquid channel is strip-shaped hole 45.

Preferably, the distal end (one end far from main channel) of the hollow groove 43 is equipped with fixed structure 46, so as to make Core 44 must be blocked and be extracted or be pushed into indwelling hose 13 with the stretching or retraction of elastic webbing 42.

Preferably, the fixed structure 46 is the fixing groove bigger compared to the rest part diameter of hollow groove 43, described The tail end for blocking core 44 has one section of larger diameter section to match with the fixing groove, to make the tail end for blocking core 44 by card In fixing groove.

Preferably, the closure core 44 is arranged to, and when the elastic webbing 42 bounces back naturally, the front end for blocking core 44 is proper Sports-like to 13 front end of indwelling hose opening, thus by entire indwelling hose 13 blood and medical fluid be discharged, block it is whole A indwelling hose 13；And when the elastic webbing 42 is stretched to maximum length, the front end for blocking core 44 remains in closure core In the arc pipeline section 412 of conduit 41 and it is located at the downstream for sealing diaphragm 47, to prevent from blocking core 44 from closure 41 He of core conduit It seals and deviates from the aperture of diaphragm 47.

Preferably, a side flap of elastic webbing 42 and fixation kit 2 is closed on and is arranged in parallel, and the distal end of elastic webbing 42 is (remote Side from main channel) it is provided with fixed part 50, it is provided on the side flap closed on elastic webbing 42 and the fixed part 50 The facies posterior hepatis to match, the facies posterior hepatis are radially extended along the side flap, so that the elastic webbing 42 is in natural shrinking and most It can be fixed by being formed between fixed part 50 and facies posterior hepatis in the entire scope stretched greatly.

Preferably, the fixed part 50 is hook or adhesive sticker or velcro.

Preferably, the fin of the fixation kit 2 is flexible material, and the covering of glue applied side is stiff sheet, fin Gluing side is adhered on the stiff sheet, so that elastic webbing 42 can keep tensional state when unused, makes to seal Stifled core 44 exits the straight pipe 411 for blocking core conduit 41, concedes 411 channel of straight pipe for puncture needle 31.

Preferably, the glue applied side of the fin positioned at 11 two sides of main channel is covered by the same stiff sheet.

Preferably, the front end of the indwelling hose 13 has transition rings 15 gradually thinning on infusion direction, outside Wall is gradually shunk to puncture needle on infusion direction, so that the bus of arc line shaped is showed, in order to which indwelling hose is with puncture Steel needle 31 enters blood vessel, while damage when reducing puncture to vascular wall；The inner sidewall of the transition rings 15 is on infusion direction In tapered truncated cone-shaped, the needle point of the puncture needle 31 is cone.

Preferably, the bus that the bus inclination angle of the truncated cone-shaped is equal to or more than the cone tip of puncture needle 31 inclines Angle, so that the inner sidewall of transition rings 15 is wrapped in the end of 31 needle point of puncture needle, the needle point pair of puncture needle 31 when puncturing The transition rings 15 form support, and indwelling hose 13 is driven to puncture forward, when preventing from puncturing, due to indwelling hose 13 and steel needle Between difference diametrically, and lead to obstruction of the vascular wall to indwelling hose 13, cause indwelling hose 13 in puncture process Retraction.

Since the height (i.e. the height of rotary table) of transition rings 15 directly affects the front opening bore of transition rings 15, Ye Jiliu Set the front opening bore of hose 13.If the bore of front opening is too small (i.e. transition rings 15 are excessively high), when infusion, will form obvious Medical liquid jet, cause to be generated uncomfortable reaction by infusion person, and blocking is more readily formed in too small opening；If the mouth of front opening Diameter is excessive (i.e. 15 ring of transition height is too low), and inner wall is too small in the bond area of needle surface, considers further that the indwelling is soft Pipe 13 is flexible material, and transition rings 15 are thinner compared to the main part of indwelling hose 13, and therefore, too low height is easy to draw The retraction of transition rings 15 is played, and the purpose for being easy to puncture is not achieved.It is preferred, therefore, that the height of the transition rings 15 is to puncture 0.1-0.6 times of 31 tip height of steel needle, more preferable 0.2-0.5 times, more preferable 0.3-0.4 times.

Preferably, the closure core 44 has hemispherical front end, and the diameter for blocking core 44 is soft less than the indwelling The internal diameter of pipe main part, so that the semi-spherical portion for blocking 44 front end of core abuts against the transition just in sealed condition The inner sidewall of ring 15, and plugging gap 51 is formed between closure core 44 and the inner wall of indwelling hose 13.

Preferably, the elastic webbing 42 is the foldable material of silicone rubber material or interior packet spring.

Preferably, the diameter for blocking core 44 is less than the internal diameter of indwelling hose 13, to prevent from drawing again after closure The swabbing action to blood is formed during stretching elastic webbing 42.

Preferably, the straight pipe top for blocking core conduit 41 is equipped with soft rubber stopper, after puncture needle 31 exits, medical fluid It cannot enter from the circular open 49 on top for blocking core conduit 41.

Preferably, strip-shaped hole 45, and the closure core are offered on the whole straight pipe for blocking core conduit 41 Fixation is pasted with filter membrane on the inner wall of conduit 41, enters in main channel 11 to prevent haemocyte from passing through strip-shaped hole 45.

The specifically used method of the sterile anti-reflux remaining needle described in the utility model for being easy to puncture is as follows: dismantling packaging Sterile plastic packaging bag, take out remaining needle, at this time the fin of fixation kit 2 answer it is intact be adhered on stiff sheet, elastic webbing 42 are in tensional state, and are fixed on the facies posterior hepatis on a side flap by the fixed part 50 of its distal end, and puncture needle 31 plugs Inside indwelling hose 13, and the tip portion of the puncture needle 31 is exposed outside indwelling hose；According to conventional remaining needle Piercing step is punctured, and extracts steel needle out after the completion of puncturing；Two side flaps of fixation kit 2 are torn up from both ends, are disengaged it from It takes stiff sheet after stiff sheet away, fin glue applied side is attached at human body indwelling, at this point, elastic webbing 42 is still within stretching State；Sterile film is attached at the point of puncture of indwelling hose 13 and skin；According to the mode of operation liquid medicine injection of conventional remaining needle； When injecting liquid drug need to interrupt, fixed part 50 and facies posterior hepatis are separated, elastic webbing 42 is made slowly to bounce back, bounces back to after nature and again will Fixed part 50 is fixed in conjunction with facies posterior hepatis, is optionally injected tube-sealing solution from infusion connector 12 at this time and is sealed with further improvement Pipe effect.

Claims (10)

1. it is a kind of be easy to puncture sterile anti-reflux remaining needle, including needle body component (1), fixation kit (2), piercing assembly (3), Tube sealing component (4), the needle body component (1) include main channel (11), infusion connector (12), indwelling hose (13), soft rubber stopper (14), it is characterised in that: the piercing assembly (3) includes puncture needle (31), has the needle point of cone, and the indwelling is soft The front end for managing (13) is equipped on infusion direction gradually thinning transition rings (15), the bus of lateral wall be it is arc-shaped, in Side wall is in tapered truncated cone-shaped on infusion direction, and the inclination angle of the bus of the truncated cone-shaped is not less than the circular cone of puncture needle (31) The bus inclination angle of shape needle point, so that transition rings (15) be made to be wrapped in the end of puncture needle (31) needle point.

2. being easy to the sterile anti-reflux remaining needle punctured as described in claim 1, it is characterised in that: the transition rings (15) Height is 0.1-0.6 times of puncture needle (31) tip height.

3. being easy to the sterile anti-reflux remaining needle punctured as described in claim 1, it is characterised in that: the fixation kit (2) Sticking fin including being fixed on main channel (11) two sides；The tube sealing component (4) includes being located in main channel (11) It blocks core conduit (41) and is located at main channel (11) external elastic webbing (42), one end of the elastic webbing (42) is led with core is blocked (41) connection is managed, interior be equipped with blocks core (44), and closure core (44) can block by the retraction elastic force of elastic webbing (42) Enter in indwelling hose (13) under the guidance of core conduit (41).

4. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 3, it is characterised in that: closure core (44) tool There is hemispherical front end, and the diameter for blocking core (44) is less than the internal diameter of indwelling hose (13) main part, so that blocking When state, core (44) the hemispherical front end that blocks is against the inner sidewall of the transition rings (15), and in the closure core (44) Plugging gap (51) are formed between the inner wall of indwelling hose (13).

5. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 3, it is characterised in that: the closure core conduit (41) it is arranged in the inside of main channel (11), including straight pipe (411) and the curved pipe being connected to the straight pipe (411) top Section (412), the arc pipeline section (412) is interior to be equipped with sealing diaphragm (47), and the sealing diaphragm (47) is equipped with and the closure The aperture of core (44) sealing cooperation.

6. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 5, it is characterised in that: the main channel (11) Side wall is equipped with circular hole (48), and one end of the arc pipeline section (412) is connected to circular hole (48)；The elastic webbing (42) is located at master The outside in channel (11), one end are fixedly connected with the side wall of main channel (11), are had inside the elastic webbing (42) one along its axis To the hollow groove (43) of extension, one end of the hollow groove (43) is connected to circular hole (48), is blocked core (44) and is passed through circular hole (48) Positioned at hollow groove (43) and block in core conduit (41).

7. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 6, it is characterised in that: the hollow groove (43) Distal end is equipped with fixed structure (46) for the fixed tail end for blocking core (44).

8. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 7, it is characterised in that: the elastic webbing (42) End is equipped with fixed part (50), and a side flap of fixation kit (2) is equipped with to match with the fixed part (50) and be drawn with fixed The facies posterior hepatis of elastic webbing (42) after stretching.

9. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 8, it is characterised in that: closure core (44) quilt It is set as, when the elastic webbing (42) bounces back naturally, the front end for blocking core (44) moves to indwelling hose (13) front end just Opening；And when the elastic webbing (42) is stretched to maximum length, the front end for blocking core (44) is retained in closure core and leads Manage in the arc pipeline section (412) of (41) and be located at the downstream of sealing diaphragm (47).

10. being easy to the sterile anti-reflux remaining needle punctured as claimed in claim 9, it is characterised in that: the fixation kit (2) Fin be flexible material, the glue applied side of one side gluing, two fins covers by the same stiff sheet, makes unused When elastic webbing (42) by fixed part (50) and facies posterior hepatis cooperation keep tensional state.