CN219579590U - Anticoagulation device and indwelling needle comprising same - Google Patents

Abstract

The utility model discloses an anticoagulant device and an indwelling needle comprising the anticoagulant device. The anticoagulation device comprises an extension catheter, a four-way extension tube seat and a flow regulating device; the first end of the extension catheter can be connected to the puncture needle; the four-way extension tube seat is provided with a first through hole tube, a second through hole tube, a third through hole tube and a fourth through hole tube which are communicated with each other; the first through hole pipe is communicated with the second end of the extension catheter, the second through hole pipe is in sealing connection with the elastic vesicle, the third through hole pipe is in sealing connection with the heparin cap, and the fourth through hole pipe is in sealing connection with the plugging end cap; the flow regulating device is arranged on the extension catheter and is used for controlling the flow of the infusion channel in the extension catheter. The continuous positive pressure state or the fading state of the elastic vesicle can be judged by observing the drum and the flat state of the elastic vesicle, the fading condition of the positive pressure can be directly judged and identified visually, and the state can be monitored and processed in time at any time. The heparin cap is arranged to avoid the caused thrombus.

Description

Anticoagulation device and indwelling needle comprising same

Technical Field

The utility model relates to the technical field of medical instruments, in particular to an anticoagulation device and an indwelling needle comprising the same.

Background

The use of the indwelling needle can reduce the pain and fear of the patient caused by repeated venipuncture, lighten the fidgetiness of family members, facilitate clinical medication, rescue medication of emergency and critical patients, lighten the workload of nurses and reduce the pain of patients, so the intravenous indwelling needle is widely applied in clinic.

The venous indwelling needle in the prior art can be pulled out after infusion is finished, and because the human vein has certain blood pressure, the blood can flow back to the catheter in a negative pressure state, and the blood can be precipitated into platelets for a long time so as to promote thrombosis, or the thrombus can enter a patient along with liquid medicine during the next infusion, so that unnecessary medical accidents are caused.

Therefore, the continuous positive pressure venous indwelling needle provided by the utility model is provided with an anticoagulation device, and in the clinical application process, the continuous positive pressure antithrombotic continuity and observability can be ensured by visually and intuitively judging and identifying the positive pressure fading condition, so that the problem to be solved is urgent.

Disclosure of Invention

The utility model aims to provide an anticoagulation device and an indwelling needle comprising the anticoagulation device, which can ensure the continuity and observability of continuous positive pressure antithrombotic through visual judgment and identification of positive pressure fading, and solve the technical problems that the pressure state of a venous indwelling needle cannot be effectively observed at present and thrombus enters a patient along with liquid medicine to cause medical accidents.

In order to achieve the above object, one embodiment of the present utility model provides an anticoagulant device, including an extension tube, a four-way extension tube holder, and a flow regulator; the first end of the extension catheter can be connected to the puncture needle; the four-way extension tube seat is provided with a first through hole tube, a second through hole tube, a third through hole tube and a fourth through hole tube which are communicated with each other; the first through hole pipe is communicated with the second end of the extension catheter, the second through hole pipe is in sealing connection with the elastic vesicle, the third through hole pipe is in sealing connection with the heparin cap, and the fourth through hole pipe is in sealing connection with the plugging end cap; the flow regulating device is arranged on the extension catheter and is used for controlling the flow of the infusion channel in the extension catheter.

Further, a transparent end cap is fixed outside the elastic vesicle, and the elastic vesicle can expand and become a drum or contract and become a flat state in the transparent end cap, so as to judge the continuous or fading state of positive pressure by observing the drum and flat state of the elastic vesicle in the transparent end cap.

Further, the second through hole pipe is provided with a pipe orifice end face, and a sealing ring is arranged on the outer surface of the second through hole pipe and adjacent to the pipe orifice end face; the elastic vesicle is provided with an elastic deformation sleeve, a first annular side wall and a second annular side wall, the first annular side wall is arranged corresponding to the end face of the pipe orifice, and the second annular side wall is arranged corresponding to the sealing ring; the transparent end cap is provided with a connecting part, an abutting boss and a transparent observing part; the diameter of the transparent observation part is smaller than that of the connecting part, and the transparent observation part and the connecting part are connected through the abutting boss; the connecting portion is connected with the outer surface of the second through hole pipe, the inner side wall, adjacent to the abutting boss, of the transparent observing portion is correspondingly arranged with the sealing ring, so that the second annular side wall and the sealing ring are in interference fit to form elastic linear seal, the abutting boss and the pipe orifice end face are pressed and deformed to form plane seal, and the elastic deformation sleeve is contained in the transparent observing portion.

Further, the transparent observation portion is provided with an exhaust hole.

Further, the extension conduit is a flexible tube, and the flow regulating device comprises a tube sealing clamp which is clamped on the extension conduit; the pipe sealing clamp is provided with a pipe clamp protrusion and an elastic plug block which are oppositely arranged, the pipe clamp protrusion is provided with a pipe clamp end face towards the extension pipe, the elastic plug block is provided with a plug block end face towards the extension pipe, and the extension pipe is clamped between the pipe clamp end face and the plug block end face.

Further, the end face of the pipe clamp is provided with a plurality of tooth-shaped grooves which are arranged at equal intervals; or the end face of the pipe clamp is provided with a plurality of arc grooves which are arranged at equal intervals; or the end face of the pipe clamp is provided with a plurality of trapezoid grooves which are arranged at equal intervals.

Further, the end face of the plug block is a round end face for accommodating the extension guide pipe; or the end face of the chock is an arc-shaped end face for accommodating the extension conduit; or the end face of the plug block is a flat end face which is abutted against the extension conduit.

Further, the flow regulating device comprises a tube sealing switch valve which is connected to the extension conduit; the tube-sealing switch valve comprises a front cover and a rear cover which can be coaxially and rotatably connected, and an elastic gasket is arranged between the front cover and the rear cover; the front cover is provided with a central bayonet, a first catheter connector and a first infusion channel, and the first catheter connector is connected to the first infusion channel; the elastic gasket is provided with a central hole, a small directional groove, a large directional groove and a micro-groove, wherein the small directional groove and the large directional groove are arranged on the outer side of the annular side wall of the elastic gasket, and the micro-groove is arranged on one surface of the elastic gasket; the rear cover is provided with a central shaft lock catch, a second conduit joint, a small directional boss, a large directional boss and a second infusion channel, the second conduit joint is connected to the second infusion channel, and the small directional boss and the large directional boss are arranged on the inner side of the annular side wall of the rear cover; the central hole of the elastic gasket is in interference fit with the central shaft lock catch on the rear cover, the surface of the elastic gasket provided with the micro-groove is arranged towards the rear cover, and the small orientation groove and the large orientation groove on the elastic gasket are respectively in clearance fit and orientation assembly with the small orientation boss and the large orientation boss on the rear cover; the elastic washer can be driven to rotate by rotating the rear cover, when the first infusion channel and the second infusion channel are correspondingly arranged, the first infusion channel and the second infusion channel are communicated, and otherwise, the first infusion channel and the second infusion channel are closed.

Further, the flow regulating device comprises a two-way switch valve, and the two-way switch valve is connected to the extension conduit; the two-way switch valve comprises a valve seat and a valve inner shaft which is rotatably arranged in the valve seat; the top of the valve inner shaft is provided with a handle, the bottom of the valve inner shaft is provided with a buckle, the middle part of the valve inner shaft extending into the valve seat is provided with a passage and a micro-flow passage which are arranged in an intersecting manner, and the diameter of the micro-flow passage is smaller than that of the passage; the valve seat is provided with two pipeline joints connected to the extension guide pipe, the upper surface of the valve seat is provided with a gear which is arranged around the valve inner shaft, a limiting ring which is arranged corresponding to the buckle is arranged in the valve seat, and the handle can be communicated with the two pipeline joints through the channel or the microfluidic channel by screwing.

The utility model also provides an indwelling needle comprising a puncture needle head, a needle handle, a separation plug, a catheter seat and the anticoagulation device; the needle handle is coated at the tail part of the puncture needle head; the isolation plug is arranged on the outer surface of the puncture needle head and is adjacent to the needle handle; the catheter seat is connected with the needle handle and is coated on the outer surfaces of the isolating plug and the middle part of the puncture needle head; the catheter seat is provided with a bypass pipe communicated with the puncture needle head; the bypass tube is connected to an extension tube in the anticoagulant device.

The utility model has the beneficial effects that the anticoagulation device and the indwelling needle comprising the anticoagulation device are provided, the elastic vesicle is arranged, positive pressure is formed to expand after the liquid medicine is filled in the elastic vesicle, the continuous positive pressure state or the fading state can be judged visually and directly by observing the drum and the flat state of the elastic vesicle, the fading state of the positive pressure can be judged and identified, and the monitoring and the timely treatment of the state can be carried out at any time. The heparin cap is arranged to avoid thrombus caused by blood backflow and infiltration in the flow regulating device due to blood accumulation caused by micro-infiltration formed when the flow regulating device is used for sealing a pipe.

Drawings

The technical scheme and other beneficial effects of the present utility model are presented by the detailed description of the specific embodiments of the present utility model with reference to the accompanying drawings.

Fig. 1 is a schematic structural view of an indwelling needle including an anticoagulant device according to an embodiment of the present utility model.

Fig. 2 is a schematic view of a part of a four-way extension tube seat according to an embodiment of the present utility model.

Fig. 3 is a schematic structural view of an elastic bladder according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of a transparent end cap according to an embodiment of the present utility model.

Fig. 5 is a schematic diagram of a combination structure of four-way extension tube seat according to an embodiment of the present utility model.

Fig. 6 is a schematic structural diagram of a sealing clip according to an embodiment of the present utility model.

Fig. 7 is a schematic structural view of a tube sealing clip provided by an embodiment of the present utility model clamped on an extension catheter.

FIG. 8 is a cross-sectional view of a clip according to one embodiment of the present utility model clamped to an elongate catheter.

FIG. 9 is a cross-sectional view of a clip according to one embodiment of the present utility model clamped to an elongate catheter.

FIG. 10 is a cross-sectional view of a clip according to one embodiment of the present utility model clamped to an elongate catheter.

Fig. 11 is a schematic structural diagram of a tube sealing switch valve according to an embodiment of the present utility model.

Fig. 12 is a schematic structural diagram of a front cover according to an embodiment of the present utility model.

Fig. 13 is a schematic structural view of another view angle of the front cover according to the embodiment of the present utility model.

Fig. 14 is a schematic structural view of an elastic gasket according to an embodiment of the present utility model.

Fig. 15 is a schematic structural view of another view of an elastic gasket according to an embodiment of the present utility model.

Fig. 16 is a schematic structural view of a rear cover according to an embodiment of the present utility model.

Fig. 17 is a schematic structural view of another view of the rear cover according to the embodiment of the present utility model.

Fig. 18 is a schematic structural diagram of a two-way switch valve according to an embodiment of the present utility model.

FIG. 19 is a cross-sectional view of a valve seat provided in an embodiment of the present utility model.

Fig. 20 is a schematic structural view of an inner valve shaft according to an embodiment of the present utility model.

Fig. 21 is a schematic structural diagram of a two-way switch valve according to an embodiment of the present utility model when normal infusion is opened.

Fig. 22 is a schematic structural diagram of a two-way switch valve according to an embodiment of the present utility model when a microfluidic channel is opened.

Fig. 23 is a schematic structural view of an indwelling needle according to an embodiment of the present utility model when a fully opened channel is opened by using a tube sealing clip.

Fig. 24 is a schematic view of a structure of an indwelling needle according to an embodiment of the present utility model when a tube sealing clip is used to open a microfluidic channel.

Fig. 25 is a schematic structural view of an indwelling needle according to an embodiment of the present utility model when a fully opened channel is opened by using a tube sealing switch valve.

Fig. 26 is a schematic structural diagram of an indwelling needle according to an embodiment of the present utility model when a micro-fluidic channel is opened by using a tube-sealing switch valve.

Fig. 27 is a schematic structural view of an indwelling needle according to an embodiment of the present utility model when a two-way switching valve is used to open a normal infusion.

Fig. 28 is a schematic structural diagram of an indwelling needle according to an embodiment of the present utility model when a two-way switching valve is used to open a microfluidic channel.

Description of the embodiments

The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

Specifically, referring to fig. 1, an anticoagulant device according to an embodiment of the present utility model includes an extension tube 3, a four-way extension tube holder 5, and a flow regulator.

Wherein the first end of the extension catheter 3 is capable of communicating to the piercing needle 1; the four-way extension tube seat 5 is provided with a first through hole tube 5.1, a second through hole tube 5.2, a third through hole tube 5.3 and a fourth through hole tube 5.4 which are communicated with each other; the first through hole pipe 5.1 is communicated to the second end of the extension catheter 3, the second through hole pipe 5.2 is in sealing connection with the elastic vesicle 6, the third through hole pipe 5.3 is in sealing connection with the heparin cap 8, and the fourth through hole pipe 5.4 is in sealing connection with the plugging end cap 9; the flow regulating device is arranged on the extension catheter 3 and is used for controlling the flow of the infusion channel in the extension catheter 3.

According to the embodiment of the utility model, the elastic vesicle 6 is arranged, positive pressure is formed to expand after the liquid medicine is filled in the elastic vesicle 6, and the continuous positive pressure state or the fading state can be visually and directly judged and identified by observing the drum and the flat state of the elastic vesicle 6, so that the state can be monitored at any time and can be timely processed.

The heparin cap 8 imitates the effect of the kefu principle on sealing the vein indwelling needle so as to reduce the medical cost of patients and improve the working efficiency of nurses. The heparin cap 8 is matched with the arteriovenous indwelling needle, can be repeatedly punctured for transfusion and medicine injection, is a standard locking joint, and can prevent blood from flowing back and anticoagulation after heparin sodium is injected. The heparin cap 8 is arranged to avoid thrombus caused by blood backflow and infiltration in the flow regulating device due to micro-infiltration formed when the flow regulating device is used for sealing a pipe.

Referring to fig. 1, a transparent end cap 7 is further fixed to the elastic vesicle 6, and the elastic vesicle 6 can expand and contract to be inflated or deflated in the transparent end cap 7, so as to determine the continuous or subsided state of positive pressure by observing the inflation and deflation states of the elastic vesicle 6 in the transparent end cap 7. The four-way extension tube socket 5, the elastic bladder and the transparent end cap connection assembly form a visual effect. The transparent end cap 7 forms a large cavity, so that the elastic vesicle 6 can expand and deform, and enough medicine flow and continuous positive pressure time are ensured.

Referring to fig. 2 to 5, the second through hole pipe 5.2 is provided with a pipe orifice end face 5.2.2, and a sealing ring 5.2.1 is arranged at a position adjacent to the pipe orifice end face 5.2.2 on the outer surface of the second through hole pipe 5.2; the elastic vesicle 6 is provided with an elastic deformation sleeve 6.3, a first annular side wall 6.1 and a second annular side wall 6.2, the first annular side wall 6.1 is correspondingly arranged with the pipe orifice end face 5.2.2, and the second annular side wall 6.2 and the sealing ring 5.2.1 are correspondingly arranged; the transparent end cap 7 is provided with a connecting part 7.4, an abutting boss 7.3 and a transparent observing part 7.1; the diameter of the transparent observation part 7.1 is smaller than that of the connecting part 7.4, and the transparent observation part 7.1 and the connecting part 7.4 are connected through the abutting boss 7.3; the connecting portion 7.4 is in locking connection with the external thread 5.2.3 on the outer surface of the second through hole pipe 5.2 through threads, the transparent observing portion 7.1 is adjacent to the inner side wall 7.2 of the abutting boss 7.3 and is arranged corresponding to the sealing ring 5.2.1, so that the second annular side wall 6.2 and the sealing ring 5.2.1 are in interference fit to form elastic linear seal, the first annular side wall 6.1 is extruded and deformed between the abutting boss 7.3 and the pipe orifice end face 5.2.2 to form plane seal, and the elastic deformation sleeve 6.3 is contained in the transparent observing portion 7.1.

Further, the transparent observation portion 7.1 is provided with an exhaust hole. The vent holes allow smooth venting of the elastic vesicles 6 in the transparent end cap 7, and the continuous or negative positive pressure state can be determined by observing the state of the elastic vesicles 6 in the transparent end cap 7 when they are inflated.

Referring to fig. 1, 6 and 7, the extension pipe 3 is a flexible pipe, the flow regulator includes a sealing pipe clamp 4, and the sealing pipe clamp 4 is clamped on the extension pipe 3; the tube sealing clamp 4 is provided with a tube clamp protrusion 4.2 and an elastic plug 12 which are oppositely arranged, the tube clamp protrusion 4.2 faces the extension tube 3 and is provided with a tube clamp end face 4.1, the elastic plug 12 faces the extension tube 3 and is provided with a plug end face 12.1, and the extension tube 3 is clamped between the tube clamp end face 4.1 and the plug end face 12.1.

The sealing tube clamp 4 clamps the extension tube 3 to prevent the fluidity of the liquid medicine, and the flow of the clamping part of the extension tube 3 is in a micro-flow micro-permeation state by a flexible sealing clamp mode, so that the required liquid medicine flow in the extension tube 3 is maintained.

Further, the pipe clamp end face 4.1 is provided with a plurality of tooth-shaped grooves which are arranged at equal intervals; or the pipe clamp end face 4.1 is provided with a plurality of arc grooves which are arranged at equal intervals; or the pipe clamp end surface 4.1 is provided with a plurality of trapezoid grooves which are arranged at equal intervals. The tube clamp end face 4.1 has various different forms, so that the required liquid medicine flow in the tube is ensured.

As shown in fig. 8, the end face 12.1 of the chock is a circular end face for accommodating the extension pipe 3; or as shown in fig. 9, the end face 12.1 of the chock is an arc-shaped end face for accommodating the extension pipe 3; alternatively, as shown in fig. 10, the block end face 12.1 is a flat end face that abuts against the extension pipe 3. The plug end face 12.1 has a plurality of different forms, so that the required medicine liquid flow in the tube is ensured.

As shown in fig. 11 to 17, the flow rate adjusting device includes a tube-closing on-off valve 13, the tube-closing on-off valve 13 being connected to the extension pipe 3; the tube-sealing switch valve 13 comprises a front cover 13.1 and a rear cover 13.2 which can be coaxially and rotatably connected, and an elastic gasket 13.3 is arranged between the front cover 13.1 and the rear cover 13.2; the front cover 13.1 is provided with a central bayonet 13.1.1, a first conduit fitting 13.1.2 and a first infusion channel 13.1.3, the first conduit fitting 13.1.2 being connected to the first infusion channel 13.1.3; the elastic washer 13.3 is provided with a central hole 13.3.2, a small directional groove 13.3.1, a large directional groove 13.3.3 and a micro-groove 13.3.4, the small directional groove 13.3.1 and the large directional groove 13.3.3 are arranged outside the annular side wall of the elastic washer 13.3, and the micro-groove 13.3.4 is arranged on one surface of the elastic washer 13.3; the rear cover 13.2 is provided with a central shaft lock catch 13.2.1, a second conduit joint 13.2.2, a small directional boss 13.2.3, a large directional boss 13.2.4 and a second infusion channel 13.2.5, the second conduit joint 13.2.2 is connected to the second infusion channel 13.2.5, and the small directional boss 13.2.3 and the large directional boss 13.2.4 are arranged on the inner side of the annular side wall of the rear cover 13.2; the central hole 13.3.2 of the elastic washer 13.3 is in interference fit with the central shaft lock 13.2.1 on the rear cover 13.2, the surface of the elastic washer 13.3 provided with the micro-groove 13.3.4 is arranged towards the rear cover 13.2, and the small orientation groove 13.3.1 and the large orientation groove 13.3.3 on the elastic washer 13.3 are respectively in clearance fit and orientation assembly with the small orientation boss 13.2.3 and the large orientation boss 13.2.4 on the rear cover 13.2; the elastic washer 13.3 can be driven to rotate by rotating the rear cover 13.2, when the first transfusion channel 13.1.3 and the second transfusion channel 13.2.5 are correspondingly arranged, the first transfusion channel 13.1.3 and the second transfusion channel 13.2.5 are communicated, and otherwise, the first transfusion channel and the second transfusion channel are closed.

The flow of the infusion channel is controlled by rotating the rear cover 13.2 to adjust the distance between the micro-flow groove 13.3.4 and the limited flow channel space. Screwing the rear cover 13.2 to the right to be in an open state, wherein the first transfusion channel 13.1.3 is arranged corresponding to the second transfusion channel 13.2.5; the rear cover 13.2 is screwed to the first transfusion channel 13.1.3 and the second transfusion channel 13.2.5 to be arranged in a staggered way, and the two are closed, namely, the transfusion micro-flow state is achieved.

As shown in fig. 18 to 22, the flow rate regulating device includes a two-way on-off valve 14, the two-way on-off valve 14 being connected to the extension pipe 3; the two-way switching valve 14 comprises a valve seat 14.1 and an inner valve shaft 14.2 rotatably arranged in the valve seat 14.1; the top of the valve inner shaft 14.2 is provided with a handle 14.2.1, the bottom of the valve inner shaft 14.2 is provided with a buckle 14.2.2, the middle part of the valve inner shaft 14.2 extending into the valve seat 14.1 is provided with a channel 14.2.3 and a micro-flow channel 14.2.4 which are arranged in an intersecting manner, and the diameter of the micro-flow channel 14.2.4 is smaller than that of the channel 14.2.3; the valve seat 14.1 is provided with two pipeline joints 14.1.2 connected to the extension conduit 3, the upper surface of the valve seat 14.1 is provided with a gear 14.1.1 arranged around the valve inner shaft 14.2, the valve seat 14.1 is internally provided with a limiting ring 14.1.3 arranged corresponding to the clamping buckle 14.2.2, the clamping buckle 14.2.2 is provided with a taper and is in interference fit with the limiting ring 14.1.3, and the handle 14.2.1 can be communicated with the two pipeline joints 14.1.2 through the channel 14.2.3 or the micro-flow channel 14.2.4 by screwing.

The screwing handle 14.2.1 is provided with a pipeline joint 14.1.2 through a gear 14.1.1, and the communicating state of the pipeline joint 14.1.2 with the channel 14.2.3 and the micro-flow channel 14.2.4 respectively limits the flow channel space to control the flow rate of the infusion channel. The state of fig. 21 is an open state in which the handle 14.2.1 is parallel to the extension catheter 3, and the state of fig. 22 is a closed state in which the handle 14.2.1 is perpendicular to the extension catheter 3, that is, a state of infusion microfluidics.

As shown in fig. 1, 23 to 28, the present utility model also provides an indwelling needle suitable for use in a vein or artery. The indwelling needle comprises a puncture needle head 1, a needle handle 10, a separation plug 11, a catheter seat 2 and the anticoagulation device; the needle handle 10 is coated at the tail part of the puncture needle head 1; a spacer 11 is arranged on the outer surface of the puncture needle head 1 and is adjacent to the needle handle 10; the catheter seat 2 is connected with the needle handle 10 and is coated on the outer surfaces of the isolating plug 11 and the middle part of the puncture needle head 1; the catheter seat 2 is provided with a bypass pipe communicated with the puncture needle head 1; the bypass tube is connected to an extension tube 3 in the anticoagulant device.

As shown in fig. 23 and 24, the pressure in the indwelling needle is determined to be positive or negative by observing the state of the elastic balloon 6 in which the catheter clip 4 is inflated and deflated in the state of clamping the microfluidic device.

As shown in fig. 25 and 26, the back cover 13.2 of the tube sealing switch valve 13 can be screwed to adjust the flow rate of the drug infusion, and the pressure in the indwelling needle is judged to be positive or negative by observing the inflation and deflation states of the elastic balloon 6.

As shown in fig. 27 and 28, the handle 14.2.1 of the tube sealing switch valve 14 can be screwed to adjust the flow rate of the drug infusion, and the pressure in the indwelling needle can be determined to be positive or negative by observing the deflated state of the elastic balloon 6.

The utility model has the beneficial effects that the anticoagulation device and the indwelling needle comprising the anticoagulation device are provided, the elastic vesicle 6 is arranged, positive pressure is formed to expand after the elastic vesicle 6 is filled with liquid medicine, the continuous positive pressure state or the fading state can be judged visually and directly by observing the drum and the flat state of the elastic vesicle (6), the fading condition of the positive pressure can be judged and identified, and the monitoring and the timely treatment of the state can be carried out at any time. The heparin cap 8 is arranged to avoid thrombus caused by blood backflow and infiltration in the flow regulating device due to micro-infiltration formed when the flow regulating device is used for sealing a pipe.

In the foregoing embodiments, the descriptions of the embodiments are emphasized, and for parts of one embodiment that are not described in detail, reference may be made to related descriptions of other embodiments.

The foregoing has described in detail embodiments of the present utility model, and specific examples have been employed herein to illustrate the principles and embodiments of the present utility model, the above description of the embodiments being only for the purpose of aiding in the understanding of the technical solution and core idea of the present utility model; those of ordinary skill in the art will appreciate that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. An anticoagulant device, comprising:

an extension catheter (3) the first end of which can be connected to the puncture needle (1);

the four-way extension tube seat (5) is provided with a first through hole tube (5.1), a second through hole tube (5.2), a third through hole tube (5.3) and a fourth through hole tube (5.4) which are communicated with each other; the first through hole pipe (5.1) is communicated to the second end of the extension catheter (3), the second through hole pipe (5.2) is in sealing connection with the elastic vesicle (6), the third through hole pipe (5.3) is in sealing connection with the heparin cap (8), and the fourth through hole pipe (5.4) is in sealing connection with the plugging end cap (9); and

and the flow regulating device is arranged on the extension catheter (3) and is used for controlling the flow of the infusion channel in the extension catheter (3).

2. An anticoagulant device as claimed in claim 1, wherein a transparent end cap (7) is fixed to the elastic vesicle (6), and the elastic vesicle (6) can be inflated and deflated in the transparent end cap (7) to judge the positive pressure continuous or resolved state by observing the drum and deflated state of the elastic vesicle (6) in the transparent end cap (7).

3. An anticoagulant device as claimed in claim 2, wherein,

the second through hole pipe (5.2) is provided with a pipe orifice end face (5.2.2), and a sealing ring (5.2.1) is arranged at the position, adjacent to the pipe orifice end face (5.2.2), of the outer surface of the second through hole pipe (5.2);

the elastic vesicle (6) is provided with an elastic deformation sleeve (6.3), a first annular side wall (6.1) and a second annular side wall (6.2), the first annular side wall (6.1) is arranged corresponding to the pipe orifice end face (5.2.2), and the second annular side wall (6.2) and the sealing ring (5.2.1) are arranged corresponding to each other;

the transparent end cap (7) is provided with a connecting part (7.4), an abutting boss (7.3) and a transparent observing part (7.1); the diameter of the transparent observation part (7.1) is smaller than that of the connecting part (7.4), and the transparent observation part (7.1) and the connecting part (7.4) are connected through the abutting boss (7.3);

the connecting part (7.4) is connected with the outer surface of the second through hole pipe (5.2), the transparent observing part (7.1) is adjacent to the inner side wall (7.2) of the abutting boss (7.3) and is correspondingly arranged with the sealing ring (5.2.1), so that the second annular side wall (6.2) and the sealing ring (5.2.1) are in interference fit to form elastic linear seal, the abutting boss (7.3) and the pipe orifice end face (5.2.2) are extruded and deformed to form plane seal, and the elastic deformation sleeve (6.3) is contained in the transparent observing part (7.1).

4. An anticoagulant device as claimed in claim 3, characterized in that the transparent observation portion (7.1) is provided with an exhaust hole.

5. An anticoagulant device as claimed in claim 1, characterized in that the extension tube (3) is a flexible tube, the flow regulating device comprising a tube closure clip (4), the tube closure clip (4) being clamped on the extension tube (3);

the pipe sealing clamp is characterized in that the pipe sealing clamp (4) is provided with pipe clamp bulges (4.2) and elastic plugs (12) which are oppositely arranged, the pipe clamp bulges (4.2) are provided with pipe clamp end faces (4.1) towards the extension pipe (3), the elastic plugs (12) are provided with plug end faces (12.1) towards the extension pipe (3), and the extension pipe (3) is clamped between the pipe clamp end faces (4.1) and the plug end faces (12.1).

6. An anticoagulant device as claimed in claim 5, characterized in that the tube clamp end face (4.1) is provided with a plurality of tooth grooves arranged at equal intervals; or the end face (4.1) of the pipe clamp is provided with a plurality of arc grooves which are arranged at equal intervals; or the pipe clamp end face (4.1) is provided with a plurality of trapezoid grooves which are arranged at equal intervals.

7. An anticoagulant device as claimed in claim 5, characterized in that the stopper end face (12.1) is a circular end face housing the extension tube (3); or the end face (12.1) of the chock is an arc-shaped end face for accommodating the extension conduit (3); or the end face (12.1) of the chock is a flat end face abutting against the extension conduit (3).

8. An anticoagulant device as claimed in claim 1, characterized in that the flow regulating means comprise a tube-sealing on-off valve (13), the tube-sealing on-off valve (13) being connected to the extension tube (3);

the tube-sealing switch valve (13) comprises a front cover (13.1) and a rear cover (13.2) which can be coaxially and rotatably connected, and an elastic gasket (13.3) is further arranged between the front cover (13.1) and the rear cover (13.2);

the front cover (13.1) is provided with a central bayonet (13.1.1), a first catheter connector (13.1.2) and a first infusion channel (13.1.3), and the first catheter connector (13.1.2) is connected to the first infusion channel (13.1.3);

the elastic gasket (13.3) is provided with a central hole (13.3.2), a small directional groove (13.3.1), a large directional groove (13.3.3) and a micro-groove (13.3.4), the small directional groove (13.3.1) and the large directional groove (13.3.3) are arranged on the outer side of the annular side wall of the elastic gasket (13.3), and the micro-groove (13.3.4) is arranged on one surface of the elastic gasket (13.3);

the rear cover (13.2) is provided with a central shaft lock catch (13.2.1), a second conduit connector (13.2.2), a small directional boss (13.2.3), a large directional boss (13.2.4) and a second infusion channel (13.2.5), the second conduit connector (13.2.2) is connected to the second infusion channel (13.2.5), and the small directional boss (13.2.3) and the large directional boss (13.2.4) are arranged on the inner side of the annular side wall of the rear cover (13.2);

the central hole (13.3.2) of the elastic gasket (13.3) is in interference fit with the central shaft lock catch (13.2.1) on the rear cover (13.2), the surface of the elastic gasket (13.3) provided with the micro-groove (13.3.4) is arranged towards the rear cover (13.2), and the small orientation groove (13.3.1) and the large orientation groove (13.3.3) on the elastic gasket (13.3) are respectively in clearance fit and orientation assembly with the small orientation boss (13.2.3) and the large orientation boss (13.2.4) on the rear cover (13.2); the elastic gasket (13.3) can be driven to rotate by rotating the rear cover (13.2), when the first infusion channel (13.1.3) and the second infusion channel (13.2.5) are correspondingly arranged, the two are communicated, and otherwise, the two are closed.

9. An anticoagulant device as claimed in claim 1, characterized in that the flow regulating means comprise a two-way on-off valve (14), the two-way on-off valve (14) being connected to the extension catheter (3);

the two-way switch valve (14) comprises a valve seat (14.1) and a valve inner shaft (14.2) rotatably arranged in the valve seat (14.1);

the top of the valve inner shaft (14.2) is provided with a handle (14.2.1), the bottom of the valve inner shaft (14.2) is provided with a buckle (14.2.2), the middle part of the valve inner shaft (14.2) extending into the valve seat (14.1) is provided with a passage (14.2.3) and a micro-flow passage (14.2.4) which are arranged in an intersecting manner, and the diameter of the micro-flow passage (14.2.4) is smaller than that of the passage (14.2.3);

the valve seat (14.1) is provided with two pipeline joints (14.1.2) connected to the extension guide pipe (3), the upper surface of the valve seat (14.1) is provided with a gear (14.1.1) which is arranged around the valve inner shaft (14.2), a limiting ring (14.1.3) which is arranged corresponding to the buckle (14.2.2) is arranged in the valve seat (14.1), and the handle (14.2.1) can be screwed to be communicated with the two pipeline joints (14.1.2) through the channel (14.2.3) or the micro-flow channel (14.2.4).

10. An indwelling needle, comprising:

a puncture needle (1);

a needle handle (10) which is coated at the tail part of the puncture needle head (1);

a separation plug (11) which is arranged on the outer surface of the puncture needle head (1) and is adjacent to the needle handle (10);

a catheter seat (2) which is connected with the needle handle (10) and is coated on the outer surfaces of the isolating plug (11) and the middle part of the puncture needle head (1); the catheter seat (2) is provided with a bypass pipe communicated with the puncture needle head (1); and

an anticoagulant device according to any one of claims 1 to 9, the bypass tube being connected to an extension tube (3) in the anticoagulant device.