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

An easy-to-puncture sterile anti-reflux indwelling needle

technical field

The utility model relates to the technical field of medical equipment, in particular to an easy-to-puncture sterile anti-reflux indwelling needle.

Background technique

Indwelling needle is a common infusion device in clinical application. It reduces the suffering of patients and the workload of medical staff, and also reduces the probability of puncture accidents through a single puncture and repeated use for infusion in the subsequent treatment period.

Because it stays on the patient's body for a long time, and its flexible needle part is in direct contact with the patient's blood. Therefore, the flexible needle tube of the indwelling needle is usually made of biocompatible materials such as Teflon. Some scholars have shown that in the case of keeping the puncture part relatively sterile and the surrounding skin clean, as long as there is no blockage and leakage, the indwelling time of the indwelling needle can reach more than 7 days. The longest retention time in the clinical observation record is 27 days. But in fact, during the intermission of infusion, blood backflow and tube blockage caused by coagulation of backflow blood are very likely to occur, thereby making the indwelling needle lose the meaning of indwelling.

In addition, there is also a widespread problem that the indwelling needle cannot be fixed for a long time during use. This type of problem is mainly manifested in the process of unbearable pain, profuse sweating or continuous exercise. The most typical example is in the obstetrics ward, the assisted delivery process of using an indwelling needle to infuse oxytocin while giving birth is one of the very common operation methods at present. The mother endures severe pain during childbirth, accompanied by profuse sweating and constant exertion. In this case, the conventional film fixation method can only last for one or two hours, causing medical staff to frequently re-fix or even replace the indwelling needle.

The indwelling needles in the prior art are mainly divided into two types: A type (open type) and Y type (closed type). Among them, the type A indwelling needle is often sealed with a locking solution during the infusion interval. The operation method is to inject the locking solution into the heparin cap through a syringe, and withdraw the needle while pushing the sealing solution to prevent the blood from being drawn when the needle is withdrawn. The blood returns due to the suction effect, and after the injection of the sealing solution, use the clip to clamp the extension tube of the indwelling needle. However, the operation method of withdrawing the needle while injecting is too complicated, and it is very easy to make mistakes and cause blood return.

There are many studies on the non-return and tube sealing of Y-type indwelling needles, such as setting stop clips or flow restrictors on the connecting tube to prevent blood return, but this method is similar to the tube sealing method of A-type indwelling needles, and cannot solve the problem. Injection of lock solution is too complicated.

Chen Dajin and others designed an indwelling needle with a flow-stopping switch (CN105935460A), which compresses the capsule tube 8 upstream of the indwelling soft needle through the helical advancement (closed state) of the DC switch, and cuts off the liquid passage between the indwelling hose and the outside to achieve stoppage. flow. The anti-flow switch of this solution is still a kind of anti-flow clip in essence, but its anti-flow point is more forward than the conventional anti-flow clip, and the blood cannot flow back into the indwelling needle body. However, this solution needs to rely on the compression of the capsule tube to stop the flow, and the screw switch outside the needle body needs to be left outside the fixed film for easy screwing, and the size of the indwelling needle is larger, which leads to more complicated fixation problems, and, This solution still does not take into account the backflow of blood into the indwelling tubing.

The puncture principle of the indwelling needle is to pierce the blood vessel wall through the puncture steel needle, and then drive the indwelling hose into the venous blood vessel. However, due to the consideration of the safety of indwelling needles, the existing indwelling needles are all soft flexible materials. When puncturing, the diameters of the indwelling hose and the puncture steel needle are different, resulting in the needle tip of the steel needle piercing the blood vessel. However, the indwelling hose will still be resisted by the wall of the blood vessel, so that the retraction or withdrawal of the indwelling hose relative to the steel needle will occur, and the damage to the blood vessel wall will be greater.

Contents of the invention

Aiming at the above-mentioned technical problems in the prior art, the utility model provides an easy-to-puncture sterile anti-reflux indwelling needle. By improving the indwelling hose, there will be no sliding displacement between the indwelling hose and the puncture needle during re-puncture, which prevents the retraction and retraction of the indwelling hose, and at the same time, the indwelling needle is easy to fit and indwell The position is fixed, and it can prevent the blood from flowing back into the indwelling hose, so as to completely prevent the formation of coagulation and thrombus.

In the present invention, definitions such as "front end", "end end", "tail end" and "downstream" are used. Wherein, during infusion, the direction of flow of medicinal liquid is the front end and downstream.

In order to achieve the above object, the utility model provides the following technical solutions.

An easy-to-puncture sterile anti-reflux indwelling needle includes a needle body component 1, a fixing component 2, a puncture component 3 and a sealing tube component 4. The needle body assembly includes a main channel 11, an infusion interface 12, an indwelling hose 13, and a soft rubber plug 14. The indwelling hose 13 and the soft rubber plug 14 are respectively fixed at both ends of the main channel 11, and the infusion interface 12 is arranged on the main channel. The side wall of 11 communicates with the outside; the fixed assembly 2 includes a plurality of fins fixedly arranged on the outer wall of the main channel 11, one side of the fins is coated with adhesive, and the glued side is provided with a cover, When in use, the cover can be directly attached and fixed on the indwelling place after being torn off; the puncture assembly 3 includes a puncture steel needle 31, a puncture steel needle fixing plug 32, an end cap 33, a needle handle (not shown in the figure), and a steel needle sleeve (not shown in the figure), the tail end of the steel needle 31 is fixed on the puncture steel needle fixing plug 32, the puncture steel needle fixing plug 32 is embedded in the end cap 33, and the end cap 33 is fixedly arranged on the tail of the steel needle sleeve. end, the steel needle cannula is slidably sleeved on the outside of the main channel 11, and can be removed from the main channel 11; the sealing tube assembly 4 includes an elastic band 42, a sealing core 44, a sealing core catheter 41. The sealing diaphragm 47, one end of the elastic band 42 is fixedly arranged on the side wall of the main passage 11, and the other end can be stretched freely, and a hollow groove 43 is provided inside it, and a hollow groove 43 is provided on the side wall of the main passage 11. A round hole 48 connected at one end of the slot 43, the plugging core 44 is a solid flexible material, which is sealed and arranged in the hollow slot 43 of the elastic band 42, and the plugging core 44 can pass through the side wall of the main passage 11. The circular hole 48 extends into the main channel 11, the side of the circular hole 48 located in the main channel 11 is connected to the plugging core conduit 41, and the other end of the plugging core conduit 41 is connected to the end of the indwelling hose 13, when When the elastic band 42 contracts naturally, the plugging core 44 can pass through the plugging core catheter 41 and enter the indwelling hose 13 by virtue of the elastic force of retraction, preventing the blood from flowing back. Extract out in flexible pipe 13, open infusion channel. The side of the blocking core conduit 41 close to the indwelling hose 13 is provided with a strip-shaped hole 45 and a non-perforated annular belt for abutting against the end of the indwelling hose 13, so as to facilitate the liquid medicine to enter the indwelling hose and block the A circular opening 49 for the puncture needle 31 to pass through is provided on the side of the core conduit 41 close to the soft rubber plug 14 .

Preferably, the plugging core conduit 41 includes a straight pipe section 411 and an arc-shaped pipe section 412, wherein one end of the arc-shaped pipe section 412 is connected to the upper part of the straight pipe section 411 (the side close to the soft rubber plug), and the other end is connected to the main channel 11 The circular holes 48 on the side walls are connected; the lower section of the straight pipe section 411 (that is, the side close to the indwelling hose) is a common channel for the piercing steel needle 31 and the plugging core 44, and the upper section of the straight pipe section 411 is the opening of the piercing steel needle 31. The channel, the arc-shaped pipe section 412 is the channel of the plugging core 44 ; the sealing diaphragm 47 is arranged in the arc-shaped pipe section 412 .

Preferably, the distal end (the end away from the main channel) of the hollow groove 43 is provided with a fixing structure 46, so that the blocking core 44 can be pulled out or pushed into the indwelling hose as the elastic band 42 is stretched or retracted. 13.

Preferably, the fixing structure 46 is a fixing groove with a larger diameter than the rest of the hollow groove 43, and the tail end of the plugging core 44 has a section with a larger diameter matching the fixing groove, Thus, the tail end of the plugging core 44 is stuck in the fixing groove.

Preferably, the sealing core 44 is configured such that when the elastic band 42 retracts naturally, the front end of the sealing core 44 just moves to the opening of the indwelling hose 13 , so that the entire indwelling hose 13 Blood and medicinal liquid are discharged, and the entire indwelling hose 13 is blocked; and when the elastic band 42 is stretched to the maximum length, the front end of the blocking core 44 remains in the arc-shaped pipe section 412 of the blocking core catheter 41 and The downstream of the sealing membrane 47 prevents the plugging core 44 from coming out of the opening of the plugging core conduit 41 and the sealing membrane 47 .

Preferably, the elastic band 42 is adjacent to and parallel to one side flap of the fixing assembly 2, the far end of the elastic band 42 (the side away from the main channel) is provided with a fixing portion 50, and the side flap adjacent to the elastic band 42 is provided with The attachment part matched with the fixing part 50, the attachment part extends along the radial direction of the side flap, so that the elastic band 42 can be attached to the fixing part 50 in the whole range of natural shrinkage and maximum stretching. Fixed between parts.

Preferably, the fixing part 50 is a hook or a self-adhesive or Velcro.

Preferably, the fins of the fixing assembly 2 are made of a flexible material, and the covering on the glued side thereof is a rigid thin plate, and the glued side of the fins is adhered to the rigid thin plate, so that the elastic band 42 The stretched state can be maintained, so that the plugging core 44 withdraws from the straight pipe section 411 of the plugging core conduit 41 , and the passage of the straight pipe section 411 is made available for the puncture needle 31 .

Preferably, the front end of the indwelling hose 13 (the end away from the indwelling needle) has a transition ring 15 that is thinner than the rest, which gradually shrinks toward the puncture needle 31 in the direction close to the puncture needle 31, thus presenting a The arc-shaped busbar facilitates the indwelling hose to enter the blood vessel with the puncture needle 31, and at the same time reduces the damage to the blood vessel wall during puncture.

Preferably, the elastic band 42 is made of silicon rubber or a foldable material with a spring inside.

Preferably, the indwelling needle is packaged in a sterile package, such as a sterile plastic bag.

Preferably, the diameter of the blocking core 44 is smaller than the inner diameter of the indwelling hose 13, so as to prevent the blood from being sucked when the elastic band 42 is stretched again after blocking.

Preferably, a soft rubber plug is provided on the upper part of the straight pipe section of the plugging core catheter 41 , and when the puncture needle 31 exits, the liquid medicine cannot enter from the upper circular opening 49 of the plugging core catheter 41 .

Preferably, strip holes 45 are provided on the entire straight pipe section of the plugging core catheter 41, and a filter membrane is fixedly attached to the inner wall of the plugging core catheter 41, thereby preventing blood cells from passing through the strip holes. 45 into the main passage 11.

Preferably, the plugging gap 51 may be a channel opened on the surface of the plugging core 44, so that when the plugging core 44 is pulled out, the tube sealing solution or medicinal solution can be injected synchronously to make the tube sealing Liquid or medicinal liquid enters the blood vessel from the blocking gap 51 to balance the negative pressure generated when the blocking core 44 is drawn out, preventing the blood from being sucked.

The specific usage method of the easy-to-puncture sterile anti-reflux indwelling needle described in the utility model is as follows: unpack the aseptic plastic bag for packaging, and take out the indwelling needle. On the rigid thin plate, the elastic band 42 is in a stretched state, and is fixed to the attachment portion on one side wing through the fixing portion 50 at the far end, and the puncture steel needle 31 is inserted inside the indwelling hose 13, and the puncture steel needle 31 The needle tip part of the needle is exposed outside the indwelling hose; puncture according to the puncture procedure of the conventional indwelling needle, and pull out the steel needle after the puncture is completed; tear off the wings on both sides of the fixing component 2 from both ends to make it detach from the rigid sheet and remove the rigid Thin plate, attach the glued side of the flap to the indwelling place of the human body, at this time, the elastic band 42 is still in a stretched state; attach a sterile film at the puncture point between the indwelling hose 13 and the skin; operate according to the conventional indwelling needle Inject the liquid medicine in this way; when the liquid medicine injection needs to be interrupted, separate the fixing part 50 and the attachment part, make the elastic band 42 retract slowly, and then combine the fixing part 50 and the attachment part to fix after retracting to the natural state. Inject the tube lock solution from the infusion port 12 to further improve the tube lock effect.

The utility model directly introduces the plugging core 44 into the indwelling hose 13, thereby preventing blood from entering the indwelling hose 13 and the main channel 11, and blocking the blood backflow, so that no matter in the main channel 11 of the indwelling needle or in the indwelling soft tube No blood coagulation or thrombus will occur in the tube 13. At the same time, the guiding of the flexible plugging core 44 is realized by setting the plugging core catheter 41, so that it can smoothly enter and exit the indwelling tube 13, and the integrally sealed elastic band 42 Then the plugging core 44 is completely sealed in the inside of the indwelling needle, which avoids bringing in bacteria during the process of pulling the plugging core. In addition, in actual use, it is also possible to selectively mix conventional locking fluid to further fill the sealing gap 51 between the sealing core 44 and the indwelling hose 13 to improve the sealing effect. The indwelling needle of the utility model has its own fixing assembly, which is integrated with the indwelling needle, which can effectively improve the indwelling effect caused by factors such as patient twisting during the indwelling process compared with conventional indwelling needles without fixing components. The needle is misplaced, and then the indwelling hose 13 is pulled out.

Description of drawings

In order to further disclose the specific technical content of the present utility model, the following describes in detail in conjunction with the embodiments and accompanying drawings, wherein:

Fig. 1 is the overall schematic diagram of the sterile anti-reflux indwelling needle that is easy to puncture according to the utility model;

Fig. 2 is the schematic diagram of plugging core catheter;

Fig. 3 is the schematic diagram of elastic belt;

Fig. 4 is a sectional view of the elastic band;

Fig. 5 is a partial enlarged view of area A in Fig. 1;

Fig. 6 is a partial enlarged view of area B in Fig. 1;

Fig. 7 is a schematic diagram of the indwelling hose in a blocked state;

FIG. 8 is a schematic diagram of the transition ring 15 wrapping the puncture needle.

In the figure: needle body component 1, fixing component 2, puncture component 3, tube sealing component 4, main channel 11, infusion interface 12, indwelling hose 13, soft rubber stopper 14, transition ring 15, puncture steel needle 31, puncture steel Needle fixing plug 32, end cap 33, plugging core catheter 41, straight tube section 411, arc tube section 412, elastic band 42, hollow groove 43, plugging core 44, strip hole 45, fixing structure 46, sealing diaphragm 47 , a circular hole 48, a circular opening 49, a fixing portion 50, and a sealing gap 51.

Detailed ways

The technical solutions of the present utility model are further described below in conjunction with the embodiments.

As shown in FIGS. 1-6 , an easy-to-puncture sterile anti-reflux indwelling needle includes a needle body component 1 , a fixing component 2 , a puncture component 3 and a tube sealing component 4 . The needle body assembly includes a main channel 11, an infusion interface 12, an indwelling hose 13, and a soft rubber plug 14. The indwelling hose 13 and the soft rubber plug 14 are respectively fixed at both ends of the main channel 11, and the infusion interface 12 is arranged on the main channel. 11 and communicated with the outside; the fixing assembly 2 includes a plurality of fins fixedly arranged on the outer wall of the main channel 11, one side of the fins is coated with adhesive, and the glued side is provided with a covering , can be directly attached and fixed on the indwelling place after tearing off the cover during use; the puncture assembly 3 includes a puncture steel needle 31, a puncture steel needle fixing plug 32, an end cap 33, a needle handle (not shown in the figure), a steel needle cover tube (not shown in the figure), the tail end of the steel needle 31 is fixed on the puncture steel needle fixed plug 32, the puncture steel needle fixed plug 32 is embedded in the end cap 33, and the end cap 33 is fixedly arranged on the steel needle sleeve Tail end, the steel needle cannula is slidably sleeved on the outside of the main passage 11, and can be removed from the main passage 11; the sealing tube assembly 4 includes an elastic band 42, a plugging core 44, a plugging core Conduit 41, sealing diaphragm 47, one end of said elastic band 42 is fixedly arranged on the side wall of main passage 11, and the other end can be stretched freely, and a hollow groove 43 is arranged inside it, and the side wall of main passage 11 is provided with A round hole 48 connected to one end of the hollow groove 43, the plugging core 44 is a solid flexible material, which is sealed and arranged in the hollow groove 43 of the elastic band 42, and the plugging core 44 can pass through the side wall of the main channel 11 The round hole 48 on the top extends into the main passage 11, and the side of the round hole 48 in the main passage is connected to the plugging core conduit 41, and the other end of the plugging core conduit 41 is connected to the end of the indwelling hose 13. When the elastic band 42 contracts naturally, the plugging core 44 can pass through the plugging core catheter 41 and enter the indwelling hose 13 by virtue of the elastic force of retraction, preventing the blood from flowing back. Extract out in flexible pipe 13, open infusion channel. The side of the plugging core conduit 41 close to the indwelling hose 13 is provided with a liquid medicine channel and a non-perforated ring belt for abutting against the end of the indwelling hose 13, so that the medicinal liquid enters the indwelling hose, and the plugging core A circular opening 49 for the puncture needle 31 to pass through is provided on the side of the catheter 41 close to the soft rubber plug 14 .

Preferably, the plugging core conduit 41 includes a straight pipe section 411 and an arc-shaped pipe section 412, wherein one end of the arc-shaped pipe section 412 is connected to the middle and upper part of the straight pipe section 411 (the side close to the soft rubber plug), and the other end is connected to the main channel 11 The round holes 48 on the side wall are connected; the lower part of the straight pipe section 411 (that is, the side close to the indwelling hose) is a common channel for the piercing steel needle 31 and the plugging core 44, and the upper section of the straight pipe section 411 is the piercing steel needle 31 The arc-shaped pipe section 412 is the passage of the plugging core 44; the sealing diaphragm 47 is arranged in the arc-shaped pipe section 412. The lower portion of the straight pipe section 411 abuts against the inner side wall of the main channel 11 , and the liquid medicine channel is opened on the lower side wall of the straight pipe section 411 .

Preferably, the liquid medicine channel is a strip hole 45 .

Preferably, the distal end (the end away from the main channel) of the hollow groove 43 is provided with a fixing structure 46, so that the blocking core 44 can be pulled out or pushed into the indwelling hose as the elastic band 42 is stretched or retracted. 13.

Preferably, the fixing structure 46 is a fixing groove with a larger diameter than the rest of the hollow groove 43, and the tail end of the plugging core 44 has a section with a larger diameter matching the fixing groove, Thus, the tail end of the plugging core 44 is stuck in the fixing groove.

Preferably, the sealing core 44 is set so that when the elastic band 42 retracts naturally, the front end of the sealing core 44 just moves to the opening of the front end of the indwelling hose 13, thereby placing the entire indwelling hose 13 The blood and medicinal liquid are discharged, blocking the entire indwelling hose 13; and when the elastic band 42 is stretched to the maximum length, the front end of the blocking core 44 remains in the arc-shaped pipe section 412 of the blocking core catheter 41 And it is located downstream of the sealing diaphragm 47 , so as to prevent the plugging core 44 from coming out of the opening of the plugging core conduit 41 and the sealing diaphragm 47 .

Preferably, the elastic band 42 is adjacent to and parallel to one side flap of the fixing assembly 2, the far end of the elastic band 42 (the side away from the main channel) is provided with a fixing portion 50, and the side flap adjacent to the elastic band 42 is provided with The attachment part matched with the fixing part 50, the attachment part extends along the radial direction of the side flap, so that the elastic band 42 can be attached to the fixing part 50 in the whole range of natural shrinkage and maximum stretching. Fixed between parts.

Preferably, the fixing part 50 is a hook or a self-adhesive or Velcro.

Preferably, the fins of the fixing assembly 2 are made of a flexible material, and the covering on the glued side thereof is a rigid thin plate, and the glued side of the fins is adhered to the rigid thin plate, so that the elastic band 42 The stretched state can be maintained, so that the plugging core 44 withdraws from the straight pipe section 411 of the plugging core conduit 41 , and the passage of the straight pipe section 411 is made available for the puncture needle 31 .

Preferably, the glued sides of the fins located on both sides of the main channel 11 are covered by the same rigid thin plate.

Preferably, the front end of the indwelling hose 13 has a transition ring 15 that gradually becomes thinner in the direction of infusion, and its outer wall gradually shrinks toward the puncture needle in the direction of infusion, thereby presenting an arc-shaped generatrix for easy indwelling The flexible tube enters the blood vessel with the puncture needle 31, and at the same time reduces the damage to the blood vessel wall during puncture; the inner wall of the transition ring 15 is in the shape of a tapered cone in the infusion direction, and the needle tip of the puncture needle 31 is conical .

Preferably, the inclination angle of the generatrix of the truncated cone is equal to or greater than the inclination angle of the generatrix of the conical needle point of the puncture steel needle 31, so that when punctured, the inner sidewall of the transition ring 15 wraps around the end of the needle tip of the puncture steel needle 31, and the puncture steel needle 31 The tip of the needle forms a support for the transition ring 15, and drives the indwelling hose 13 to puncture forward, preventing the vascular wall from indwelling the indwelling hose 13 due to the difference in diameter between the indwelling hose 13 and the steel needle during puncture. The blocking of the indwelling hose 13 causes the retraction of the indwelling hose 13 during the puncture.

Because the height of the transition ring 15 (ie the height of the conical table) directly affects the opening diameter of the front end of the transition ring 15 , that is, the opening diameter of the front end of the indwelling hose 13 . If the caliber of the front opening is too small (that is, the transition ring 15 is too high), an obvious jet of liquid medicine will be formed during infusion, causing an uncomfortable reaction to the infused person, and an opening that is too small is more likely to form a blockage; (that is, the height of the transition ring 15 is too low), the attachment area of its inner wall on the surface of the needle tip is too small, and considering that the indwelling hose 13 is a flexible material, and the transition ring 15 is more dense than the main part of the indwelling hose 13 Therefore, a too low height will easily cause the retraction of the transition ring 15, and the purpose of easy puncture will not be achieved. Therefore, preferably, the height of the transition ring 15 is 0.1-0.6 times, more preferably 0.2-0.5 times, more preferably 0.3-0.4 times the height of the needle tip of the puncture needle 31 .

Preferably, the plugging core 44 has a hemispherical front end, and the diameter of the plugging core 44 is smaller than the inner diameter of the main part of the indwelling hose, so that in the blocked state, the hemispherical front end of the plugging core 44 The portion just abuts against the inner wall of the transition ring 15 and forms a sealing gap 51 between the sealing core 44 and the inner wall of the indwelling hose 13 .

Preferably, the elastic band 42 is made of silicon rubber or a foldable material with a spring inside.

Preferably, the diameter of the blocking core 44 is smaller than the inner diameter of the indwelling hose 13, so as to prevent the blood from being sucked when the elastic band 42 is stretched again after blocking.

Preferably, a soft rubber plug is provided on the upper part of the straight pipe section of the plugging core catheter 41 , and when the puncture needle 31 exits, the liquid medicine cannot enter from the upper circular opening 49 of the plugging core catheter 41 .

Preferably, strip holes 45 are provided on the entire straight pipe section of the plugging core catheter 41, and a filter membrane is fixedly attached to the inner wall of the plugging core catheter 41, thereby preventing blood cells from passing through the strip holes. 45 into the main passage 11.

The specific usage method of the easy-to-puncture sterile anti-reflux indwelling needle described in the utility model is as follows: unpack the aseptic plastic bag for packaging, and take out the indwelling needle. On the rigid thin plate, the elastic band 42 is in a stretched state, and is fixed to the attachment portion on one side wing through the fixing portion 50 at the far end, and the puncture steel needle 31 is inserted inside the indwelling hose 13, and the puncture steel needle 31 The needle tip part of the needle is exposed outside the indwelling hose; puncture according to the puncture procedure of the conventional indwelling needle, and pull out the steel needle after the puncture is completed; tear off the wings on both sides of the fixing component 2 from both ends to make it detach from the rigid sheet and remove the rigid Thin plate, attach the glued side of the flap to the indwelling place of the human body, at this time, the elastic band 42 is still in a stretched state; attach a sterile film at the puncture point between the indwelling hose 13 and the skin; operate according to the conventional indwelling needle Inject the liquid medicine in this way; when the liquid medicine injection needs to be interrupted, separate the fixing part 50 and the attachment part, make the elastic band 42 retract slowly, and then combine the fixing part 50 and the attachment part to fix after retracting to the natural state. Inject the tube lock solution from the infusion port 12 to further improve the tube lock 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.