CN112587755A

CN112587755A - Remaining needle capable of preventing thrombosis

Info

Publication number: CN112587755A
Application number: CN202011463115.6A
Authority: CN
Inventors: 张洪
Original assignee: Zigong First Peoples Hospital
Current assignee: Zigong First Peoples Hospital
Priority date: 2020-12-11
Filing date: 2020-12-11
Publication date: 2021-04-02
Anticipated expiration: 2040-12-11
Also published as: CN112587755B

Abstract

The invention relates to the field of medical instruments, in particular to an anti-thrombosis remaining needle, which comprises a needle seat, wherein a catheter and a tube seat are arranged on the needle seat, the catheter is communicated with the tube seat, the tube seat is communicated with an extension tube, a one-way conduction device is arranged in the tube seat and is used for enabling liquid to flow into the catheter from the extension tube in a one-way mode and preventing the liquid on one side of the catheter from flowing to the extension tube through the one-way conduction device. The utility model provides a prevent needle of keeping somewhere of thrombus formation is through setting up the one-way device that switches on in the tube socket for blood warp the pipe gets into end behind the tube socket in one-way device department that switches on, when directly having avoided the vacancy, blood backward flow to in the extension pipe, so, directly avoided the formation of thrombus in the extension pipe, not only reduced the jam risk by a wide margin, it is painful to reduce the disease and trade the needle, has still reduced the medical accident risk that leads to because of thrombus formation by a wide margin.

Description

Remaining needle capable of preventing thrombosis

Technical Field

The invention relates to the field of medical instruments, in particular to an anti-thrombosis remaining needle.

Background

The use of remaining needle can not only reduce the misery that the infant caused because of relapse venipuncture and the fear sense to making the needle, reduces the infant and ache, alleviates head of a family's anxiety, and along with the introduction of clinical steel needle zero tolerance theory, it is applicable to all clinical infusion patients to keep somewhere the needle simultaneously, and the clinical medicine of being convenient for is used, and urgent, critical patient's rescue is used medicine, alleviates nurse's work load, therefore the vein is kept somewhere the needle and is in clinical wide application.

The structure of needle is kept somewhere to current is shown in figure 1, including needle file 1, be provided with pipe 2 on the needle file 1, needle handle 3 and tube socket 5, can dismantle in the pipe 2 and be equipped with the steel needle, the pipe 2 is worn out to the steel needle point, pipe 2 intercommunication tube socket 5, needle file 1 can dismantle the joint has needle cap 4, be used for steel needle and pipe 2 not to protect it when using, tube socket 5 is through extension 6 coupling joint 8, be equipped with pipe strap 7 on the extension pipe 6, pipe strap 7 can the chucking extension 6 make extension 6 break-make, also can remove and make extension 6 unblocked, the steel needle drives pipe 2 and inserts the blood vessel together when keeping somewhere the needle use, then extract the steel needle, leave pipe 2 and connect the blood vessel.

When the medicine needs to be injected, the extension tube 6 is kept smooth, the medicine is fed through one side of the joint 8 and enters the catheter 2 through the extension tube 6 so as to enter the blood vessel; when administration is not needed, the extension tube 6 is disconnected by using the tube clamp 7, the joint 8 is vacant, blood in the blood vessel flows back to enter the indwelling needle and is stopped at the tube clamp 7, namely, the tube seat 5 and part of the extension tube 6 have blood return, and the blood in the long blood return section is easy to coagulate to form thrombus, so that the tube seat 5 and the extension tube 6 are blocked, and the indwelling needle cannot play a due role; especially when the thrombus enters the blood vessel, the thrombus can cause great medical accident risk;

in order to solve the problem, the medical staff slides the tube clamp 7 to the tube seat 5 as much as possible when the transfusion is finished, and the distance between the tube clamp 7 and the tube seat 5 is shortened as much as possible, so that the blood return length is shortened, and the thrombosis risk is reduced, but in the actual operation, the inventor finds that the current operation mode still has the problems, and the problems are specifically as follows:

after the indwelling needle is put into the completion, the needle seat 1 needs to be bound on the body of the patient by using an application or an adhesive tape, in order to avoid pulling out the catheter 2 due to pulling of the infusion tube, the extension tube 6 with a certain length at the tube seat 5 needs to be bent, and then the adhesive tape is used for binding, so that a buffer section is formed, when the infusion tube is pulled, a certain displacement buffer is provided, and further the catheter 2 is ensured not to be pulled out, so even if the tube clamp 7 is close to the tube seat 5 as much as possible, blood return still exists at the buffer section, and therefore a larger thrombosis risk also exists, particularly, the buffer section is covered by the adhesive tape, and formed thrombus is possibly blocked, and is not easy to find, and further medical accidents are caused.

Disclosure of Invention

The invention aims to: aiming at the problem that blood in a blood vessel flows back to enter an extension tube of an indwelling needle to be easily coagulated to form thrombus when the existing indwelling needle in the prior art is empty, the indwelling needle for preventing the thrombus is provided.

In order to achieve the purpose, the invention adopts the technical scheme that:

the utility model provides a prevent thrombosis keep somewhere needle, includes the needle file, be equipped with pipe and tube socket on the needle file, the pipe intercommunication the tube socket, the tube socket intercommunication has the extension pipe be equipped with the one-way device that switches on in the tube socket, the one-way device that switches on is used for liquid by the one-way inflow of extension pipe the pipe to prevent the liquid flow of pipe one side is through the one-way device flow direction extension pipe.

Preferably, the one-way conduction device is arranged on one side of the tube seat close to the guide tube.

As another preferable scheme, a side of the tube socket close to the conduit is spaced from the one-way conduction device, an observation section is formed between the side of the tube socket close to the conduit and the one-way conduction device, and at least one part of the observation section is made of transparent materials or semitransparent materials.

Furthermore, the distance between one side of the catheter and the one-way conduction device is not suitable to be too long, and only the distance can be short to observe internal blood return, for example, 1-5mm can be selected, so that the blood return condition can be observed, and the thrombosis risk can be prevented from being increased due to too long length.

Preferably, a groove is further arranged on the observation section to form an observation window, and the observation section corresponding to the bottom of the groove is made of a transparent material or a semitransparent material.

Preferably, the groove extends along a channel in the hub to the hub.

Preferably, the bottom of the groove is arc-shaped or prismatic or planar.

Preferably, the one-way conduction device is a one-way movable valve. The adoption of the one-way movable valve structure has simple structure and light weight, and further facilitates the use of the remaining needle.

Preferably, the tube seat is communicated with at least one connector through an extension tube, and a plurality of kinds of liquid medicines can be simultaneously accessed.

Further preferably, the joints comprise two joints and are arranged in a Y shape.

Preferably, the needle seat is detachably connected with a needle handle, so that the needle seat is convenient to hold.

Further preferably, the needle handle and the needle holder are oppositely arranged.

Preferably, the needle base is detachably clamped with a needle cap, and the needle cap is sleeved outside the catheter.

Preferably, the tube seat and the needle seat are arranged in a Y shape.

Preferably, keep away from in the tube socket one side of pipe is equipped with support, crowbar, button and reset unit, the button by extend to in the tube socket outside the tube socket, the button with tube socket sealing connection, the tube socket inner wall with connect between the button reset unit, the support connect in the tube socket inner wall, the crowbar middle part articulate in on the support, crowbar one end butt in one-way conduction device, the other end butt in the button, the crowbar is used for prizing open one-way conduction device makes the tube socket unblocked.

Further preferably, a sealing film is arranged between the key and the tube seat, so that the tube seat is isolated from the inside and the outside, and liquid leakage is avoided.

Further preferably, the return component is a spring or an elastic membrane material.

Further preferably, the crowbar abuts against one end of the one-way conduction device and is arc-shaped, and the arc-shaped edge is attached to the side wall of the one-way conduction device.

Preferably, the one-way conduction device and the tube seat are integrally formed.

In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:

1. the utility model provides a prevent needle of keeping somewhere of thrombus formation through set up one-way conduction device in the tube socket, through with one-way conduction device is located be close to in the tube socket catheter department, because one-way conduction device has one-way conduction's function, makes to keep somewhere the needle can only be the liquid medicine entering the tube socket reentrant behind the one-way conduction device catheter, and blood warp the catheter gets into end behind the tube socket in one-way conduction device department, when directly having avoided vacant, blood backward flow is intraductal to the extension, so, directly avoided the formation of extension intraductal thrombus, though still have certain amount of blood that returns in needle socket and tube socket, but on the one hand because this partial length is shorter, on the other hand this department is near with the internal vascular distance of patient, the needle socket is linked together with the catheter, and the catheter is arranged in the blood vessel, and the temperature of here is nearly unanimo, therefore, the blood is difficult to coagulate, so the risk of thrombus formation is greatly reduced, even if the blood is possibly coagulated, compared with the blood returning section which is longer in the extension tube and far away from the patient, the time required by the blood coagulation is greatly prolonged, namely, the blood coagulation time can be further longer than the time between two times of transfusion, and thus the risk of thrombus formation is directly avoided; therefore, the indwelling needle greatly reduces the blocking risk, reduces the pain of needle replacement of patients and greatly reduces the risk of medical accidents caused by thrombosis;

2. by adopting the scheme, the traditional pipe clamp is not adopted to block the extension pipe, so that the risk of pipeline folding, crease and even breakage caused by repeatedly extruding the extension pipe by the pipe clamp is avoided, the extension pipe is ensured to have good drift diameter stability, and the problem of unstable infusion flow rate caused by drift diameter change of the extension pipe due to folding crease is avoided;

3. the one-way conduction device is arranged on one side, close to the catheter, in the tube seat, and in the mode, the one-way conduction device is arranged on one side, close to the catheter, in the tube seat, so that blood backflow is directly avoided entering the tube seat, the blood backflow length is further shortened, and the risk of thrombosis is reduced;

4. the observation section is formed, when a medical worker places the indwelling needle into a blood vessel of a patient, whether the catheter is accurately inserted into the blood vessel needs to be judged by observing the blood backflow condition, if no blood returns, the catheter is proved not to enter the blood vessel, and the position needs to be adjusted for puncturing until the catheter is successfully inserted into the blood vessel, so that in the scheme, the observation section is formed by separating a distance between one side of the catheter and the one-way conduction device, whether the puncture is successful is evaluated by observing whether the blood returns exist in the observation section, therefore, the insertion position of the indwelling needle can be adjusted in real time according to the blood return condition in the observation section, and the puncture success rate of the indwelling needle is also ensured while the risk of thrombosis is reduced; further, in the present application, the transparent material or the translucent material may be a medical resin material, a medical rubber material, a glass material, or the like, as long as a color change of the internal liquid can be observed through the material;

5. the observation window is formed by arranging the groove, the thickness of the position is firstly reduced by arranging the groove, the observation of the internal blood return condition is more facilitated, and the problem that the observation is influenced by factors such as peripheral light reflection and the like can be avoided due to the sinking structure of the groove; furthermore, a groove is arranged at a local position to form an observation window, and the wall thickness is only reduced at the local position, so that the risk of reducing the connection strength and the structural strength caused by the integral thinning of the tube seat is avoided, and the use reliability of the indwelling needle is further ensured;

6. by utilizing a lever principle, the reset component accumulates force by pressing the key on the tube wall of the tube seat, the key pushes one end of the crowbar to move, so that the crowbar rotates around a supporting point at the supporting seat, the other end of the crowbar prizes the one-way conduction device to be opened in the one-way conduction direction, the tube seat can be conducted in two directions, the key is loosened, the key is reset under the action of the reset component, the crowbar loses the push of the key and further loses the acting force on the one-way conduction device, the one-way conduction device contracts and resets under the self characteristic and pushes the crowbar to reset, so that the tube seat restores to be conducted in one direction;

7. after the indwelling needle is inserted in place, the medical staff presses the key to enable the catheter and the extension tube to be completely communicated, the blood backflow length is increased, whether the indwelling needle is inserted successfully or not is further evaluated, if the blood backflow effect is good, normal transfusion operation is carried out, if the blood backflow is weak or insufficient, whether blood vessel puncture needs to be carried out again or not is evaluated again according to actual conditions, so that the successful puncture of the indwelling needle is ensured, and the risk of medical accidents is further reduced;

8. when one-time infusion is finished and the infusion is carried out again in a certain time, the key is pressed before the infusion, so that on one hand, the smoothness of the infusion channel in the needle seat and the tube seat is evaluated; meanwhile, when the key is pressed, blood in the catheter, the needle seat and the tube seat is pushed into the extension tube, if thrombus exists, the thrombus is pushed into the extension tube, firstly, the thrombus is prevented from entering the body of a patient to cause medical accidents, and meanwhile, medical staff can observe the blood condition in the extension tube conveniently to evaluate whether to replace an indwelling needle or perform other operations, so that the infusion safety is further ensured, and the medical accident risk is reduced;

9. in the scheme of this application, the crowbar sets up the one side of keeping away from the pipe in the tube socket, the crowbar butt is in this side valve of one-way conduction device, when the crowbar promotes the valve, the valve switches on, and under non-conducting state, the crowbar still plays the effect of supporting the valve, when avoiding being pressed because of tube socket or needle file, lead to pipe one side pressure too big and force the valve to lead to the problem of extension pipe direction, for example, the oppression that the needle formed probably is kept somewhere to other actions such as standing up under the patient sleep state, so, further improvement the reliable seal effect of one-way conduction valve, even if under the condition of pipe lateral pressure increase, still realize reliable seal ability.

Drawings

FIG. 1 is a schematic view showing the structure of a conventional indwelling needle;

FIG. 2 is a schematic structural view of one embodiment of the anti-thrombotic indwelling needle of the present application;

FIG. 3 is an enlarged view of portion A of FIG. 2;

FIG. 4 is a schematic view of the one-way switch device of FIG. 3 being opened;

FIG. 5 is a partial sectional view of an observation window of an embodiment of an anti-thrombotic indwelling needle according to the present invention.

The labels in the figure are: 1-needle seat, 2-catheter, 3-needle handle, 4-needle cap, 5-tube seat, 51-one-way conduction device, 52-support, 53-crowbar, 54-button, 55-reset component, 56-observation section, 57-observation window, 6-extension tube, 7-tube clamp and 8-connector.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 2-4, the anti-thrombosis indwelling needle of the present invention includes a needle base 1 and a needle handle 3, wherein the needle base 1 is provided with a catheter 2 and a tube base 5, the needle handle 3 is detachably connected with the needle base 1, the needle handle 3 is connected with a needle core, the needle core passes through the needle base 1 and passes through the catheter 2, the needle handle 3 is convenient to hold, the tube base 5 and the needle base 1 are arranged in a Y shape, the catheter 2 is located at one end of the needle base 1, the catheter 2 is communicated with the tube base 5, the tube base 5 is communicated with at least one connector 8 through an extension tube 6, and can be simultaneously accessed with various kinds of liquid medicines, in this embodiment, as shown in fig. 2, the connectors 8 include two connectors and are arranged in a Y shape, the needle base 1 is detachably clamped with a needle cap 4, and the needle cap 4 is sleeved outside the catheter 2.

As shown in fig. 2, a one-way conduction device 51 is disposed in the tube seat 5 at a side close to the conduit 2, and the one-way conduction device 51 is used for one-way flowing of the liquid from the tube seat 5 into the conduit 2 and preventing the liquid at the side of the conduit 2 from flowing through the one-way conduction device 51.

As shown in fig. 3, a support 52, a crowbar 53, a key 54 and a reset part 55 are arranged on one side of the tube seat 5 far away from the catheter 2, the key 54 extends from the tube seat 5 to the outside of the tube seat 5, the key 54 is hermetically connected with the tube seat 5, the reset part 55 is connected between the inner wall of the tube seat 5 and the key 54, the support 52 is connected to the inner wall of the tube seat 5, the middle part of the crowbar 53 is hinged to the support 52, one end of the crowbar 53 abuts against the one-way conduction device 51, the other end abuts against the key 54, the crowbar 53 is used for prying the one-way conduction device 51 to open the tube seat 5, one end of the crowbar 53 abutting against the one-way conduction device 51 is arc-shaped, the arc-shaped edge abuts against the side wall of the one-way conduction device 51, and by adopting the structure, the arc-shaped edge abuts against and pries the one-way conduction device 51 can prevent the, the one-way conduction means 51 is kept functional.

Specifically, the one-way conduction device 51 and the tube seat 5 are integrally formed, a sealing film is arranged between the key 54 and the tube seat 5 to isolate the inside and the outside of the tube seat 5 and avoid liquid leakage, and the reset component 55 is a spring or an elastic film material; in this embodiment, when the reset part 55 is preferably made of an elastic film material, such a structure can meet the requirement of resetting after the key 54 is pressed, and also can meet the requirement of sealing between the key 54 and the stem 5, so as to achieve the effect of multiple functions of one component, simplify the internal design of the stem 5, and save the cost.

When the pipe seat is used, by utilizing a lever principle, as shown in fig. 3, by pressing the key 54 on the pipe wall of the pipe seat 5, the reset component 55 accumulates force, the key 54 pushes one end of the crowbar 53 to move, so that the crowbar 53 rotates around the fulcrum at the support 52, and the other end of the crowbar 53 pries the one-way conduction device 51 to open in the one-way conduction direction, so that the pipe seat 5 can conduct in two directions, as shown in fig. 4.

When the key 54 is released, the key 54 is reset under the action of the reset component 55, the crowbar 53 loses the pushing of the key 54 and further loses the acting force on the one-way conduction device 51, the one-way conduction device 51 contracts and resets under the self characteristic, and pushes the crowbar 53 to reset, so that the socket 5 restores the one-way conduction, as shown in fig. 3.

As shown in fig. 5, the observation section 56 of the socket 5 is further provided with a recessed observation window 57.

Embodiments, as shown in figures 2-5,

an indwelling needle for preventing thrombosis comprises a needle base 1, wherein a catheter 2 and a tube base 5 are arranged on the needle base 1, the catheter 2 is communicated with the tube base 5, the tube base 5 is communicated with an extension tube 6, a one-way conduction device 51 is arranged in the tube base 5, the one-way conduction device 51 is used for enabling liquid to flow into the catheter 2 from the extension tube 6 in a one-way mode, and the liquid on one side of the catheter 2 is prevented from flowing to the extension tube 6 through the one-way conduction device 51. The utility model provides a prevent needle of keeping somewhere of thrombus formation through set up one-way conduction device 51 in tube socket 5, through with one-way conduction device 51 is located near in the tube socket 5 catheter 2 department, because one-way conduction device 51 has one-way conduction's function, makes the needle of keeping somewhere can only be the liquid medicine entering tube socket 5 warp get into again behind one-way conduction device 51 catheter 2, and blood through catheter 2 gets into the tube socket 5 is ended in one-way conduction device 51 department, when directly having avoided the vacancy, the blood backward flow is to extension pipe 6 in, so, directly avoided the formation of extension pipe 6 internal thrombus, though still have certain blood return volume in needle file 1 and tube socket 5, on the one hand because this part length is shorter, on the other hand this department is close to patient's internal blood vessel distance, needle file 1 is linked together with catheter 2, and catheter 2 arranges the blood vessel in, the temperature is almost the same as the body temperature of the patient, so that the blood is difficult to coagulate, the risk of thrombus formation is greatly reduced, and even if the blood is possibly coagulated, the time required by the blood coagulation is greatly prolonged compared with the blood return section which is longer in the extension tube 6 and is far away from the patient, namely, the blood coagulation time can be further longer than the time between two times of transfusion, so that the risk of thrombus formation is directly avoided; therefore, the indwelling needle greatly reduces the blocking risk, reduces the pain of needle replacement of patients and greatly reduces the risk of medical accidents caused by thrombosis;

further, adopt the scheme of this application, do not adopt traditional pipe strap 7 to block extension pipe 6, and then also avoided pipe strap 7 to extrude extension pipe 6 repeatedly and probably the pipeline that causes is buckled, the cracked risk even of crease, has also ensured extension pipe 6 and has had good latus rectum stability, avoids extension pipe 6 to lead to the latus rectum to change because of the crease that buckles, causes the unstable problem of infusion flow rate.

In a preferred embodiment, in addition to the above, the one-way conduction device 51 is further disposed inside the tube holder 5 on a side close to the catheter 2. During this kind of mode, one-way conduction device 51 sets up be close to in the tube socket 5 one side of pipe 2 has directly avoided the blood backward flow to get into in the tube socket 5, so, further shortened blood backward flow length, reduced the thrombosis risk.

In another preferred embodiment, a side of the socket 5 adjacent to the catheter 2 is spaced apart from the one-way conduction device 51, a viewing section 56 is formed between the one-way conduction device 51 and the side of the socket 5 adjacent to the catheter 2, and at least a portion of the viewing section 56 is made of a transparent material or a translucent material. When a medical worker places the indwelling needle into a blood vessel of a patient, whether the catheter 2 is accurately inserted into the blood vessel needs to be judged by observing the blood backflow condition, if the blood backflow condition does not exist, the catheter 2 is proved not to enter the blood vessel, and the position needs to be adjusted for puncturing until the catheter is successfully punctured into the blood vessel, so that in the scheme, an observation section 56 is formed by separating a distance between one side of the catheter 2 and the one-way conduction device 51, whether the puncturing is successful is evaluated by observing whether the blood backflow exists in the observation section 56, therefore, the insertion position of the indwelling needle can be adjusted in real time according to the blood backflow condition in the observation section 56, and the risk of thrombosis is reduced, and meanwhile, the puncturing success rate of the indwelling needle is ensured; further, in the present application, the transparent material or the translucent material may be a medical resin material, a medical rubber material, a glass material, or the like, as long as a color change of the internal liquid can be observed through the material;

furthermore, the distance between one side of the catheter 2 and the one-way conduction device 51 is not too long, and only needs to be short to observe internal blood return, for example, 1-5mm can be selected, so that the condition of blood return can be observed, and the risk of thrombosis caused by too long length can be avoided.

In addition to the above solution, as shown in fig. 3, a groove forming observation window 57 is further provided on the observation section 56, and the observation section 56 corresponding to the bottom of the groove is made of a transparent material or a translucent material. The observation window 57 is formed by arranging the groove, the thickness of the groove is firstly reduced, the observation of the internal blood return condition is more facilitated, and the problem that the observation is influenced by factors such as peripheral light reflection and the like due to the sinking structure of the groove can be avoided; furthermore, set up the recess in local position, form observation window 57, only reduce the wall thickness in local position, avoid the whole thinning of tube socket 5 and lead to the risk that joint strength structural strength reduces, further guaranteed this application and kept somewhere the use reliability of needle.

As a preferred embodiment, based on the above solution, further, the groove extends to the needle seat 1 along the channel in the tube seat 5. So set up, make the recess have longer length, the inside condition of returning blood of observation that can be more convenient and accurate.

In a preferred embodiment, in addition to the above aspect, the groove bottom portion is arc-shaped, prism-shaped, or planar. The bottom of the groove is arranged to be arc-surface-shaped or prism-surface-shaped, the structures have an image amplification effect, the internal blood backflow situation can be observed more conveniently by medical care, and when a plane is adopted, the visual angle distortion is small, and the internal blood backflow situation can be reflected more truly.

In a preferred embodiment, based on the above solution, the one-way guiding device 51 is a one-way movable valve. The adoption of the one-way movable valve structure has simple structure and light weight, and further facilitates the use of the remaining needle.

In a preferred embodiment, in addition to the above, the stem 5 is connected to at least one connector 8 via an extension tube 6, so that a plurality of chemical solutions can be simultaneously introduced.

In a preferred embodiment, in addition to the above solution, the joints 8 further include two joints and are arranged in a Y shape.

As a preferable embodiment, on the basis of the above scheme, further, a needle handle 3 is detachably connected to the needle base 1, so as to be convenient for holding.

In a preferred embodiment, in addition to the above, the needle shaft 3 and the needle holder 5 are provided to face each other.

As a preferred embodiment, on the basis of the above scheme, further, the needle holder 1 is detachably clamped with a needle cap 4, and the needle cap 4 is sleeved outside the catheter 2.

In a preferred embodiment, in addition to the above, the tube holder 5 and the needle holder 1 are arranged in a Y shape.

As a preferred embodiment, on the basis of the above scheme, as shown in fig. 3 and 4, a support 52, a crowbar 53, a key 54 and a reset part 55 are further arranged on one side of the tube seat 5 away from the catheter 2, the key 54 extends from the interior of the tube seat 5 to the exterior of the tube seat 5, the key 54 is hermetically connected with the tube seat 5, the reset part 55 is connected between the inner wall of the tube seat 5 and the key 54, the support 52 is connected to the inner wall of the tube seat 5, the middle part of the crowbar 53 is hinged to the support 52, one end of the crowbar 53 abuts against the one-way conduction device 51, the other end abuts against the key 54, and the crowbar 53 is used for prying the one-way conduction device 51 to open the tube seat 5.

By adopting the structure, by utilizing a lever principle, the reset component 55 accumulates force by pressing the key 54 on the tube wall of the tube seat 5, the key 54 pushes one end of the crowbar 53 to move, so that the crowbar 53 rotates around the fulcrum at the position of the support 52, the other end of the crowbar 53 prizes the one-way conduction device 51 to be opened in the one-way conduction direction, so that the tube seat 5 can be conducted in two directions, the key 54 is released, the key 54 resets under the action of the reset component 55, the crowbar 53 loses the pushing of the key 54 and further loses the acting force on the one-way conduction device 51, the one-way conduction device 51 contracts and resets under the self characteristic, and the crowbar 53 is pushed to reset, so that the tube seat 5 restores the one-way conduction;

by the mode, after the indwelling needle is inserted in place, the medical staff presses the key 54 to ensure that the catheter 2 and the extension tube 6 are completely communicated, the blood backflow length is increased, whether the indwelling needle is inserted successfully or not is further evaluated, if the blood backflow effect is good, normal transfusion operation is carried out, and if the blood backflow is weak or insufficient, whether blood vessel puncture needs to be carried out again or not is evaluated again according to actual conditions, so that the successful puncture of the indwelling needle is ensured, and the risk of medical accidents is further reduced; further, when one-time transfusion is finished and transfusion is carried out again in a certain time interval, the key 54 is pressed before transfusion, on one hand, the smoothness of the transfusion channels in the needle seat 1 and the tube seat 5 is evaluated; simultaneously, when pressing button 54, the blood in catheter 2, needle file 1 and the tube socket 5 is pushed to extension pipe 6 in, if there is the thrombus, the thrombus is then pushed to extension pipe 6, at first, avoided the thrombus to get into the patient internal, cause the medical malpractice, also further make things convenient for medical personnel to observe the blood condition in extension pipe 6 simultaneously, whether the evaluation needs to be changed and keeps somewhere the needle, perhaps carries out other operations, so, further infusion security has been ensured, medical malpractice risk is reduced.

Furthermore, in the solution of the present application, the crowbar 53 is disposed at a side of the tube seat 5 far from the catheter 2, the crowbar 53 abuts against the side valve of the one-way conduction device 51, when the crowbar 53 pushes the valve, the valve is conducted, and in a non-conduction state, the crowbar 53 also plays a role of supporting the valve, so as to avoid the problem that when the tube seat 5 or the needle seat 1 is pressed, the pressure at one side of the catheter 2 is too high to force the valve to conduct towards the direction of the extension tube 6, for example, the patient may press the indwelling needle due to other actions such as turning over during sleeping, thus further improving the reliable sealing effect of the one-way conduction valve, and even in the case that the side pressure of the catheter 2 is increased, still realizing reliable sealing capability.

In a preferred embodiment, in addition to the above, a sealing film is further provided between the push button 54 and the stem 5 to separate the inside and outside of the stem 5 and prevent liquid leakage.

In a preferred embodiment, in addition to the above, the restoring member 55 is a spring or an elastic film.

When the reset part 55 is made of an elastic film material, the structure can meet the reset requirement after the key 54 is pressed, and can also meet the sealing requirement between the key 54 and the tube seat 5, so that the effect of multiple functions of one component is achieved, the internal design of the tube seat 5 can be simplified, and the cost is saved.

In a preferred embodiment, in addition to the above, one end of the crowbar 53 abutting against the one-way conduction device 51 is arc-shaped, and the arc-shaped edge is attached to the side wall of the one-way conduction device 51.

With such a structure, the arc-shaped edge is attached to and pried by the one-way conduction device 51, so that the end part of the crowbar 53 is prevented from puncturing the one-way conduction device 51, and the one-way conduction device 51 keeps a function.

Further preferably, the one-way conduction device 51 and the socket 5 are integrally formed.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a prevent thrombosis's needle of keeping somewhere, includes needle file (1), be equipped with pipe (2) and tube socket (5) on needle file (1), pipe (2) intercommunication tube socket (5), tube socket (5) intercommunication has extension pipe (6), its characterized in that be equipped with one-way device (51) that switches on in tube socket (5), one-way device (51) that switches on be used for liquid by extension pipe (6) one-way inflow pipe (2), and the prevention the liquid flow of pipe (2) one side is through one-way device (51) flow direction extension pipe (6).

2. The anti-thrombotic indwelling needle according to claim 1, wherein the one-way conducting means (51) is provided in the base (5) on the side close to the catheter (2).

3. The anti-thrombotic indwelling needle according to claim 1, wherein the side of the hub (5) adjacent to the catheter (2) is spaced from the one-way conducting means (51), and a viewing section (56) is formed between the one-way conducting means (51) and the side of the hub (5) adjacent to the catheter (2), at least a portion of the viewing section (56) being made of a transparent or translucent material.

4. The anti-thrombotic indwelling needle according to claim 3, wherein a groove is further provided on the observation section to form an observation window, and the observation section corresponding to the bottom of the groove is made of transparent material or semitransparent material.

5. The anti-thrombotic indwelling needle according to claim 4, wherein the groove extends along a channel in the hub to the hub.

6. The antithrombogenic indwelling needle according to claim 4 or 5, wherein the groove bottom is arc-shaped or ridge-shaped or planar.

7. An anti-thrombotic indwelling needle according to claim 4, wherein the one-way conducting means (51) is a one-way movable valve.

8. Anti-thrombotic indwelling needle according to claim 2, wherein the tube base (5) communicates with at least one connector (8) through an extension tube (6).

9. The anti-thrombosis indwelling needle according to claim 7, wherein a support (52), a crowbar (53), a key (54) and a reset part (55) are arranged on one side of the tube seat (5) far away from the catheter (2), the key (54) extends out of the tube seat (5) from the interior of the tube seat (5), the key (54) is hermetically connected with the tube seat (5), the reset part (55) is connected between the inner wall of the tube seat (5) and the key (54), the support (52) is connected with the inner wall of the tube seat (5), the middle part of the crowbar (53) is hinged on the support (52), one end of the crowbar (53) is abutted against the one-way movable valve, the other end of the crowbar (53) is abutted against the key (54), and the crowbar (53) is used for prying off the one-way movable valve to ensure that the tube seat (5) is unblocked, the reset component (55) is a spring or an elastic membrane material.

10. The anti-thrombotic indwelling needle according to claim 9, wherein one end of the crowbar (53) abutting the one-way movable valve is arc-shaped, and the arc-shaped edge is attached to the one-way movable valve side wall.