CN212914067U

CN212914067U - Automatic stop type blood return prevention precise filtering infusion apparatus

Info

Publication number: CN212914067U
Application number: CN202020494961.3U
Authority: CN
Inventors: 刘辉
Original assignee: JIANGSU KANGBAO MEDICAL EQUIPMENT CO Ltd
Current assignee: JIANGSU KANGBAO MEDICAL EQUIPMENT CO Ltd
Priority date: 2020-04-08
Filing date: 2020-04-08
Publication date: 2021-04-09
Anticipated expiration: 2030-04-08

Abstract

The utility model belongs to the technical field of medical instrument, especially, be an automatic stop type prevents blood return microfiltration transfusion system, including drip chamber, puncture ware and syringe needle, the drip chamber passes through the connecting pipe and is connected with the puncture ware, the drip chamber passes through the pipe and is connected with the syringe needle, be equipped with precision filter and flow regulator on the pipe. The utility model discloses realizing the stop by oneself, when microfiltration and effectively preventing the blood return phenomenon from taking place, adopt threaded connection mode to make puncture ware and connecting pipe, connecting pipe and drip chamber, it is more firm to be connected between drip chamber and pipe and the syringe needle, avoid taking place the link problem of droing, and cooperate the setting of bearing type sealing washer, cause the pipe end to connect and possess good sealing performance, effectively improve the gas tightness of pipe connection end, effectively prevent that the air from the syringe needle connection end entering blood vessel and leading to the air embolism to take place, the safety in utilization of transfusion system has been guaranteed to the at utmost, moreover, the steam generator is simple in structure, and is practical.

Description

Automatic stop type blood return prevention precise filtering infusion apparatus

Technical Field

The utility model relates to the technical field of medical equipment, specifically a blood return prevention precision filtration transfusion system of automatic stop type.

Background

In the clinical treatment process, many patients often need to be transfused, so as to cure diseases and rescue critically ill patients by the treatment means of transfusion. Thus, a large number of infusion sets are required for clinical treatment. In the prior art, a traditional infusion apparatus generally needs a nursing staff to change liquid or pull out a needle in time after the liquid infusion of an infusion bag or an infusion bottle is finished. If the liquid is not changed or the needle is pulled out in time, the phenomenon of blood backflow often occurs. Especially when the liquid is changed by negligence or time before changing new liquid medicine, air can enter the lower pipeline of the transfusion device, and unexpected blood returning phenomenon can be caused. The blood return condition can not only cause the catheter to be incapable of being used for transfusion due to air bubble embolism, but also cause blood coagulation to form blood clots to enter the human body seriously, thereby causing injury to the human body and serious medical accidents such as iatrogenic infection, phlebitis and the like.

In order to solve the problem of blood return of the infusion catheter, chinese patent CN202654497U discloses an automatic stop type blood return prevention precision filtration infusion apparatus, when the infusion bag or the liquid of the infusion bottle enters a drip stop state after the liquid infusion is finished, the liquid in the drip chamber can still be infused slowly in stages, and simultaneously due to the tension of the liquid and the gas and the action of the air diaphragm, air is effectively prevented from entering the lower catheter, and only the liquid can pass through and enter the lower catheter, thereby really realizing automatic stop and effectively preventing the occurrence of blood return phenomenon. In the prior art, a precise filter is adopted to filter liquid medicine with high precision, air generated in the infusion process is removed, and the phenomenon of blood return can be effectively prevented, for example, a backflow-preventing precise filtering infusion set disclosed in Chinese patent CN201310614469.

Although the infusion apparatus can better solve the problems of filtering of liquid medicine and blood return of the catheter, when the corresponding problems are solved, the problems of connection firmness between the puncture outfit and the catheter, between the catheter and the drip chamber and between the catheter and the needle head are all ignored, the puncture outfit and the catheter, between the catheter and the drip chamber and between the catheter and the needle head adopt the traditional splicing connection mode, the dropping phenomenon is easy to occur, the connection sealing property is poor, and the external air is easy to enter the catheter, so that the air embolism is caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

The utility model provides a not enough to prior art, the utility model provides a blood microfiltration transfusion system is prevented returning by self-stop formula has solved and has adopted traditional plug connection mode between current transfusion system puncture ware and pipe, pipe and drip chamber and pipe and the syringe needle, easily takes place the phenomenon of droing, and it is relatively poor to connect the leakproofness, easily makes during the outside air gets into the pipe, leads to the problem of taking place the air embolism.

(II) technical scheme

In order to achieve the above object, the utility model provides a following technical scheme: an automatic-stop blood-return-preventing precise-filtering infusion apparatus comprises a dropping funnel, a puncture outfit and a needle head, wherein the dropping funnel is connected with the puncture outfit through a connecting pipe, the dropping funnel is connected with the needle head through a guide pipe, a precise filter and a flow regulator are arranged on the guide pipe, connecting ends of the puncture outfit and the connecting pipe, the connecting ends of the dropping funnel and the guide pipe and the connecting ends of the needle head and the guide pipe are respectively provided with a connecting seat, two ends of the connecting pipe and the guide pipe are respectively provided with an extrusion connecting part matched with the corresponding connecting seats, the extrusion connecting parts are provided with a pipe joint for liquid inlet and outlet, a sealing cavity is arranged inside the connecting seat, a pressure-bearing type sealing ring is arranged inside the sealing cavity, the pipe joint is in threaded connection with the connecting seats, and when the pipe joint is connected with the connecting seats, the pressure-, the pipe is characterized in that a membrane assembly part is arranged inside a pipe connector used for connecting a drip chamber on the pipe and composed of a barrel body, a buckling end, an embedded base, a filtering membrane and a pressing ring, the buckling end is connected to the top end of the barrel body and buckled with the pipe connector, the embedded base is arranged on the inner wall of one end, far away from the buckling end, of the barrel body, and the filtering membrane is tightly pressed on the embedded base through the pressing ring.

As an optimized technical scheme of the utility model, be connected with the medicine supplementing pipe on the puncture ware, the one end that the puncture ware was kept away from to the medicine supplementing pipe is equipped with sealed cap.

As an optimized technical scheme of the utility model, be equipped with the stagnant water clamp on the connecting pipe.

As a preferred technical scheme of the utility model, be equipped with the internal connection screw thread on the inner wall of connecting seat, the surface of connector head is equipped with the external connection screw thread with internal connection screw thread looks adaptation.

As a preferred technical scheme of the utility model, pressure-bearing type sealing washer is the sealing washer of trapezium structure for the section, the outer wall middle part of pressure-bearing type sealing washer is equipped with indent pressure-bearing chamber.

(III) advantageous effects

Compared with the prior art, the utility model provides a blood microfiltration transfusion system is prevented returning by self-stop formula possesses following beneficial effect:

this blood microfiltration transfusion system is prevented back to automatic stop formula, realize the automatic stop, when the microfiltration and effectively prevent back the blood phenomenon and take place, adopt threaded connection mode to make puncture ware and connecting pipe, connecting pipe and drip chamber, it is more firm to be connected between drip chamber and pipe and the syringe needle, avoid taking place the link problem of droing, and the setting of cooperation pressure-bearing type sealing washer, cause the pipe end connection to possess good sealing performance, effectively improve the gas tightness of union end, effectively prevent that the air from syringe needle link entering blood vessel and leading to the air embolism to take place, the safety in utilization of transfusion system has been guaranteed to the utmost, moreover, the steam generator is simple in structure, and is practical.

Drawings

Fig. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the connection structure of the middle connection tube, the dropping funnel and the conduit of the present invention;

fig. 3 is a schematic structural view of a pressure-bearing type sealing ring of the present invention;

fig. 4 is a schematic structural diagram of the middle membrane assembly of the present invention.

In the figure: 1. a dropping funnel; 2. a puncture instrument; 3. a needle head; 4. a connecting pipe; 5. a conduit; 6. a precision filter; 7. a flow regulator; 8. a connecting seat; 9. a connecting end; 10. a pipe connector; 11. sealing the cavity; 12. a pressure-bearing type sealing ring; 13. a membrane assembly; 1301. a barrel; 1302. buckling and connecting ends; 1303. embedding a base; 1304. a filtration membrane; 1305. pressing a ring; 14. a medicine supplementing pipe; 15. a water stop clip.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Examples

Referring to fig. 1-4, the present invention provides the following technical solutions: an automatic-stop blood return prevention precise filtering infusion apparatus comprises a dropping funnel 1, a puncture outfit 2 and a needle head 3, wherein the dropping funnel 1 is connected with the puncture outfit 2 through a connecting pipe 4, the dropping funnel 1 is connected with the needle head 3 through a guide pipe 5, a precise filter 6 and a flow regulator 7 are arranged on the guide pipe 5, the connecting end of the puncture outfit 2 and the connecting pipe 4, the connecting end of the dropping funnel 1 and the guide pipe 5 and the connecting end of the needle head 3 and the guide pipe 5 are respectively provided with a connecting seat 8, two ends of the connecting pipe 4 and the guide pipe 5 are respectively provided with an extrusion connecting part 9 matched with the corresponding connecting seat 8, the extrusion connecting part 9 is provided with a connecting pipe head 10 for liquid inlet and outlet, a sealing cavity 11 is arranged inside the connecting seat 8, a pressure-bearing type sealing ring 12 is arranged inside the sealing cavity 11, the connecting pipe head 10 is in threaded connection with, the membrane assembly 13 is arranged inside the pipe joint 10 used for connecting the drip chamber 1 on the conduit 5, the membrane assembly 13 is composed of a cylinder 1301, a buckling end 1302, an embedded base 1303, a filtering membrane 1304 and a pressing ring 1305, the buckling end 1302 is connected to the top end of the cylinder 1301, the buckling end 1302 is buckled with the pipe joint 10, the embedded base 1303 is arranged on the inner wall of one end of the cylinder 1301 far away from the buckling end 1302, and the filtering membrane 1304 is pressed on the embedded base 1303 through the pressing ring 1305.

In this embodiment, the dropping funnel 1 is further provided with an exhaust port (not shown in the figure), the exhaust port is connected with an exhaust pipe (not shown in the figure) inserted into the dropping funnel 1, so as to realize automatic exhaust, and the specific structure can refer to a self-stop blood return prevention precise filtration infusion apparatus disclosed in chinese patent CN 202654497U.

Specifically, a medicine supplementing pipe 14 is connected to the puncture outfit 2, and a sealing cap is arranged at one end, far away from the puncture outfit 2, of the medicine supplementing pipe 14.

In this embodiment, the medicine replenishing pipe 14 is used for directly adding the medicine liquid into the medicine replenishing pipe 14 by piercing the sealing cap when the medicine liquid is required to be added.

Specifically, a water stop clamp 15 is arranged on the connecting pipe 4.

In this embodiment, the water stop clamp 15 is used to clamp the connecting tube 4, so that the medicine bottle or the liquid medicine bag is not communicated with the dropping funnel 1.

Specifically, the inner wall of the connecting base 8 is provided with an inner connecting thread, and the outer surface of the connector head 10 is provided with an outer connecting thread matched with the inner connecting thread.

In this embodiment, the connecting seat 8 and the pipe joint 10 are connected by an internal connection thread and an external connection thread to ensure the firmness of pipe end connection.

Specifically, the pressure-bearing type sealing ring 12 is a sealing ring with a trapezoidal section, and an inward concave pressure-bearing cavity is arranged in the middle of the outer wall of the pressure-bearing type sealing ring 12.

In this embodiment, when the pipe joint 10 is connected to the connecting seat 8 through a threaded connection, the extrusion connection portion 9 applies a certain pressure to the pressure-bearing type sealing ring 12 in the sealing cavity 11, and the concave pressure-bearing cavity on the pressure-bearing type sealing ring 12 is deformed by the extrusion force, so that the pressure-bearing type sealing ring 12 is tightly combined with the inner wall of the connecting seat 8 and the outer wall of the pipe joint 10, and the pipe end connection has good sealing performance.

The utility model discloses a theory of operation and use flow: the connection of the puncture outfit 2 and the connection end of the connection pipe 4, the connection end of the drip chamber 1 and the connection pipe 5 and the connection end of the needle head 3 and the connection pipe 5 are firmer and more stable by adopting a threaded connection mode, because the extrusion connection part 9 applies certain pressure to the pressure-bearing type sealing ring 12 in the sealing cavity 11, the concave pressure-bearing cavity on the pressure-bearing type sealing ring 12 generates certain deformation by the extrusion force, so that the pressure-bearing type sealing ring 12 is tightly combined with the inner wall of the connection seat 8 and the outer wall of the pipe joint 10, and the pipe end connection has good; the liquid medicine in the dropping funnel 1 enters the catheter 5 through the connector 10 and the filtering membrane 1304 therein and then flows out of the catheter 5 and the fine filter 6 thereon to the needle 3, the filtering membrane 1304 in the membrane assembly 13 plays a role in coarse filtering, the filtering effect is enhanced, the infusion safety is improved, the fine filter 6 filters particles with the diameter of 5 microns and smaller in the liquid medicine in the catheter 5, the blood return phenomenon is avoided, when the infusion of the infusion bag or the infusion bottle is finished and the infusion is stopped, the liquid in the dropping funnel 1 can still be slowly infused under the action of the filtering membrane 1304, meanwhile, through the arrangement of the precise filter 6, air is effectively prevented from entering the lower section of the conduit 5, and only liquid can pass through and enter the lower section of the conduit 5, thereby really realizing automatic stop and effectively preventing the occurrence of blood return phenomenon, having simple structure and further ensuring the safety of transfusion; when the membrane assembly 13 is assembled, the filtering membrane 1304 is firstly pressed on the embedded base 1303 through the pressing ring 1305, then the cylinder 1301 is embedded in the connector 10, and finally the fastening end 1302 is fastened on the end of the connector 10, so that the filtering membrane 1304 can be conveniently assembled.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a blood return precision filtration transfusion system is prevented to self-stop formula, includes drip chamber (1), puncture ware (2) and syringe needle (3), its characterized in that: the dropping funnel (1) is connected with the puncture outfit (2) through a connecting pipe (4), the dropping funnel (1) is connected with the needle head (3) through a pipe (5), the pipe (5) is provided with a precision filter (6) and a flow regulator (7), the connecting end of the puncture outfit (2) and the connecting pipe (4), the connecting end of the dropping funnel (1) and the pipe (5) and the connecting end of the needle head (3) and the pipe (5) are respectively provided with a connecting seat (8), the two ends of the connecting pipe (4) and the pipe (5) are respectively provided with an extrusion connecting part (9) matched with the corresponding connecting seat (8), the extrusion connecting part (9) is provided with a pipe head (10) for liquid inlet and outlet, the inside of the connecting seat (8) is provided with a sealed cavity (11), the inside of the sealed cavity (11) is provided with a pressure-bearing type sealing, the connecting pipe head (10) is in threaded connection with the connecting seat (8), when the connecting pipe head (10) is connected with the connecting seat (8), the pressure-bearing type sealing ring (12) bears extrusion force of the extrusion connecting part (9), the inside of the connecting pipe head (10) used for being connected with the dropping funnel (1) on the guide pipe (5) is provided with a membrane assembly part (13), the membrane assembly part (13) consists of a cylinder body (1301), a buckling end (1302), an embedded base (1303), a filtering membrane (1304) and a pressing ring (1305), the buckling end (1302) is connected to the top end of the cylinder body (1301), the buckling end (1302) is buckled with the connecting pipe head (10), the embedded base (1303) is arranged on the inner wall of one end, far away from the buckling end (1302), of the filtering membrane (1304) is pressed on the embedded base (1303) through the pressing ring (1305).

2. The automatic stop type blood return prevention precise filtering infusion set according to claim 1, characterized in that: the puncture outfit (2) is connected with a medicine supplementing pipe (14), and one end of the medicine supplementing pipe (14) far away from the puncture outfit (2) is provided with a sealing cap.

3. The automatic stop type blood return prevention precise filtering infusion set according to claim 1, characterized in that: and a water stop clamp (15) is arranged on the connecting pipe (4).

4. The automatic stop type blood return prevention precise filtering infusion set according to claim 1, characterized in that: the inner wall of the connecting seat (8) is provided with an inner connecting thread, and the outer surface of the connector head (10) is provided with an outer connecting thread matched with the inner connecting thread.

5. The automatic stop type blood return prevention precise filtering infusion set according to claim 1, characterized in that: the pressure-bearing type sealing ring (12) is a sealing ring with a trapezoidal section, and an inwards-concave pressure-bearing cavity is arranged in the middle of the outer wall of the pressure-bearing type sealing ring (12).