CN219230980U - Infusion apparatus capable of preventing blood return - Google Patents

Abstract

The application relates to an infusion apparatus capable of preventing blood return, and relates to the technical field of infusion apparatuses, and the infusion apparatus comprises an infusion hose, a bottle stopper puncture needle, a water stopping clamp, a dropper, a flow speed regulator and a vein needle, wherein a liquid stopping mechanism is arranged on the infusion hose and comprises a liquid stopping ball, a filtering box and a liquid stopping component. When the infusion is carried out, the liquid stopping ball is far away from the infusion hose through buoyancy, the liquid medicine flows to the filter box through the infusion hose, when the liquid medicine is more, the liquid stopping component only filters the liquid medicine, when the liquid medicine in the medicine bottle is injected, the liquid stopping ball slides under the action of gravity and abuts against the communicating part of the dropper and the infusion hose, so that preliminary liquid stopping is realized, when the liquid stopping ball does not block the infusion hose in time, the liquid stopping component starts to stop liquid again for the liquid medicine, so that the probability that the pressure of a water column is smaller than the venous pressure is reduced, the probability that blood returns in the infusion process is reduced, and the probability that adverse effects are caused on human health in the infusion process is reduced.

Description

Infusion apparatus capable of preventing blood return

Technical Field

The application relates to the technical field of infusion apparatuses, in particular to an infusion apparatus capable of preventing blood return.

Background

Infusion belongs to intravenous injection treatment, and liquid substances such as blood, liquid medicine, nutrient solution and the like are continuously instilled into veins through a disposable infusion apparatus, commonly called 'drip'.

The infusion apparatus is a medical device, a channel between a vein and a liquid medicine is established through aseptic treatment, the infusion apparatus generally comprises a vein needle, a needle head protective cap, an infusion hose, a water stop clamp, a dropper, a bottle stopper puncture device, a flow rate regulator and the like, the bottle stopper puncture device is inserted into a liquid medicine bottle, the water stop clamp is opened, then the dropper is extruded to enable the liquid medicine to enter the dropper, the flow rate regulator is opened, air in the infusion hose is discharged from the vein needle under the pressure of the liquid medicine, then the flow rate regulator is closed, the vein needle is inserted into a puncture part, and then the flow rate regulator is opened to regulate the speed of infusion, so that the infusion of the liquid medicine is carried out.

The main principle of transfusion is that under the action of atmospheric pressure, the liquid in the bottle flows into the dropper along the thinner transfusion hose, and when the pressure of the water column of the dropper is greater than the venous pressure, the liquid in the bottle flows into the vein along the hose; when the current liquid medicine is about to be infused, the liquid in the dropper is less and less, and medical staff does not timely supplement the liquid medicine or pull out the infusion needle, the water column pressure gradually reduces, and when the water column pressure is less than venous pressure, the phenomenon of blood return can appear, and the blood return leads to the blockage of the needle head of the venous needle easily for the liquid medicine stagnates, needs to puncture again, and the blood of backward flow forms small thrombus at the infusion hose inner wall, and the reinfusion is caused embolism easily in the patient, has consequently caused adverse effect to human health.

Disclosure of Invention

In order to reduce the probability of adverse effects on human health in the infusion process, the application provides an infusion apparatus capable of preventing blood return.

The application provides an infusion apparatus for preventing blood return, which adopts the following technical scheme:

the utility model provides an infusion apparatus of preventing back blood, includes the infusion hose, be provided with bottle plug pjncture needle, stagnant water clamp, burette, velocity of flow regulator and vein needle on the infusion hose, be provided with liquid stopping mechanism on the infusion hose, liquid stopping mechanism includes:

the liquid stopping ball is arranged on the dropper in a sliding manner and is abutted against the infusion hose, and the liquid stopping ball is used for blocking liquid at the joint of the dropper and the infusion hose;

the filter box is arranged on the infusion hose and is positioned below the dropper;

the liquid stopping component is arranged on the filtering box and used for filtering and stopping liquid medicine.

Through adopting above-mentioned technical scheme, insert the bottle plug pjncture needle in the medicament bottle, then open the stagnant water clamp, the extrusion burette makes liquid medicine inflow burette, along with the rising of the interior liquid medicine liquid level of burette, the liquid stopping ball receives buoyancy and keeps away from the infusion hose, burette and infusion hose intercommunication this moment, open the velocity regulator, liquid medicine passes through the infusion hose flow direction and filters the box, liquid stopping component starts filtering the liquid medicine, when liquid medicine is great, liquid medicine pressure is great, liquid stopping component only filters the effect to the liquid medicine, the liquid medicine after filtering passes through the infusion hose flow direction vein needle, thereby realize the infusion process, and when the liquid medicine injection in the medicament bottle has been completed, the liquid medicine in the burette reduces gradually, the buoyancy that liquid stopping ball received is less and less when the buoyancy of liquid stopping ball, the liquid stopping ball slides under the action of gravity and support in burette and infusion hose intercommunication department, thereby realize preliminary liquid stopping, when liquid stopping ball not in time stops the infusion hose, through stopping liquid medicine again to this liquid stopping component, thereby reduce the probability that water column pressure is less than venous pressure, thereby the probability that the probability of returning in the infusion process appears in the reduction blood has reduced, thereby the health of people has bad influence to the infusion process.

Optionally, an exhaust hole is formed in the filter box; the liquid stopping assembly comprises:

the first filter membrane is arranged in the filter box and is used for filtering the liquid medicine, the filter box is divided into a first cavity and a second cavity by the first filter membrane, and the first cavity is communicated with the dropper and is used for temporarily storing the unfiltered liquid medicine; the second cavity is communicated with the intravenous needle and is used for temporarily storing the filtered liquid medicine;

the second filter membrane is arranged on the exhaust hole and is used for blocking the overflow of the liquid medicine.

By adopting the technical scheme, when the residual quantity of the liquid medicine is large, the liquid medicine pressure is large, the liquid medicine is filled in the first cavity through the infusion hose, gas in the liquid medicine is discharged through the exhaust hole, the liquid medicine in the first cavity enters the second cavity after being filtered by the first filter membrane under the pressure of the subsequent liquid medicine, and the liquid medicine in the second cavity enters the intravenous needle under the action of the subsequent liquid medicine; when impurities appear in the liquid medicine to cause that the liquid stopping ball can not stop liquid in time, the liquid medicine in the first cavity is gradually reduced, the pressure born by the liquid medicine in the second cavity is gradually reduced, under the action of the surface tension of the first filter membrane and the second filter membrane, the hydrostatic pressure and the gravity pressure acting force in the wall of the infusion hose are balanced with the tension of the first filter membrane and the second filter membrane, namely, the liquid medicine is kept still in the infusion hose under the comprehensive acting force of atmospheric pressure, hydrostatic pressure and human veins, so that the function of automatic liquid stopping is achieved; the first filter membrane and the second filter membrane are matched with the liquid stopping ball, so that the probability that the pressure of a water column is smaller than the venous pressure is reduced, and the probability of blood return in the infusion process is reduced; meanwhile, the gas in the liquid medicine is discharged, so that the probability of bubbles entering the veins of the human body is reduced, and the probability of adverse effects on the health of the human body in the infusion process is reduced.

Optionally, an exhaust component is disposed on the infusion hose, and the exhaust component includes:

the first exhaust pipe is arranged on the infusion hose and is communicated with the bottle stopper puncture needle;

the second exhaust pipe is arranged on the dropper and is communicated with the interior of the dropper, and the first exhaust pipe and the second exhaust pipe are both provided with breathable water-stopping films;

the exhaust cover is rotatably arranged on the second exhaust pipe and used for shielding the second exhaust pipe.

Through adopting above-mentioned technical scheme, insert bottle plug pjncture needle in the liquid medicine bottle, the liquid medicine flows, air in the liquid medicine is partly discharged through first blast pipe, open the stagnant water clamp, simultaneously rotate the exhaust lid and make the second blast pipe open, second blast pipe intercommunication external and infusion hose, liquid medicine directly flows into in the burette under the effect of self gravity this moment, need not to extrude the burette, thereby the convenience of liquid medicine transport has been improved, gaseous in the burette is discharged through the second blast pipe simultaneously, when the liquid medicine liquid level is higher than the second blast pipe, rotate the exhaust lid and shelter from the second blast pipe, open the velocity regulator simultaneously, liquid medicine passes through infusion hose flow direction filter box, exhaust hole on the filter box is got rid of remaining gas, through the cooperation of first blast pipe, second blast pipe and filter box, triple exhaust function is realized, thereby the exhaust effect has been improved, thereby the probability that the bubble got into human vein has been reduced, consequently, the probability that infusion process causes adverse effect to the health has been reduced.

Optionally, an alarm mechanism is provided on the infusion hose, and the alarm mechanism includes:

the clamping plate is clamped on the infusion hose and is positioned at one end of the filter box far away from the dropper;

the photoelectric sensor is arranged on the clamping plate and used for detecting the flowing condition of the liquid medicine in the infusion hose;

and the alarm assembly is arranged on the clamping plate, is electrically connected with the photoelectric sensor and is used for alarming.

Through adopting above-mentioned technical scheme, with grip block centre gripping on the infusion hose, after beginning infusion, alarm component starts, and photoelectric sensor detects the flow condition of liquid in the infusion hose, when there is not liquid medicine flowing in the infusion hose, alarm component reports to the police to this reminds medical personnel and patient, in time judges and gets rid of the reason of cutting off, with this probability that reduces infusion in-process appearance back blood, reduces the probability that the bubble got into in the human vein simultaneously, consequently reduced infusion process and caused the probability of adverse effect to human health.

Optionally, the alarm assembly includes:

the control switch is arranged on the clamping plate, is electrically connected with the photoelectric sensor and is used for controlling the opening and closing of the photoelectric sensor;

and the alarm is arranged on the clamping plate and is electrically connected with the photoelectric sensor.

Through adopting above-mentioned technical scheme, with grip block centre gripping on the infusion hose, accomplish the exhaust back, open control switch, photoelectric sensor detects the flow condition of liquid in the infusion hose in real time, when there is not liquid medicine flowing in the infusion hose, the alarm sends the warning, after using, stir the grip block and break away from the infusion hose, remain for secondary use to this convenience that improves infusion process control.

Optionally, the intravenous needle is detachably disposed on the infusion hose by a connection assembly, the connection assembly comprising:

the connecting pipe is arranged on the vein needle;

the butt joint pipe is arranged on the infusion hose and is connected with the connecting pipe in a threaded manner.

Through adopting above-mentioned technical scheme, rotate the connecting pipe and break away from the butt joint pipe, then can change the vein needle of damage or dirt, with new connecting pipe threaded connection on the connecting pipe, only need change connecting pipe and vein needle, need not to change whole transfusion system to the cost is reduced, has improved the utilization ratio of transfusion system, through changing the vein needle of damage or dirt, thereby reduces the probability that the infusion in-process causes adverse effect to human health owing to the vein needle is unusual.

Optionally, a one-way valve is arranged on the connecting pipe, and the one-way valve can only control the liquid medicine to flow to the intravenous needle.

By adopting the technical scheme, the one-way valve enables the liquid medicine to only flow to the intravenous needle, and can block the liquid medicine from flowing back and simultaneously block the blood from flowing back into the transfusion hose.

Optionally, a rotating piece convenient to rotate is arranged on the connecting pipe.

Through adopting above-mentioned technical scheme, borrow power rotation connecting pipe through the rotor to this has improved the convenience that vein needle and infusion hose are connected, thereby reduces the probability of touching with the connecting pipe inner wall when the staff rotates the connecting pipe, with this probability that gets into impurity in the connecting pipe that reduces, thereby reduced the infusion process and caused the probability of adverse effect to human health.

In summary, the present application includes at least one of the following beneficial technical effects:

the infusion bottle comprises a bottle stopper, a bottle stopper puncture needle, a water stopping clamp, a drip tube, a liquid stopping ball, a liquid stopping component, a liquid stopping hose and a liquid delivering hose, wherein the bottle stopper puncture needle is inserted into a medicine bottle, the water stopping clamp is opened, the drip tube is extruded to enable liquid medicine to flow into the drip tube, the liquid stopping ball is far away from an infusion hose along with the rising of the liquid level of the liquid medicine in the drip tube, the drip tube is communicated with the infusion hose, a flow speed regulator is opened, the liquid medicine flows to a filtering box through the infusion hose, the liquid stopping component starts to filter the liquid medicine, when the liquid medicine is more, the liquid medicine pressure is higher, the liquid stopping component only filters the liquid medicine, the filtered liquid medicine flows to a vein needle through the infusion hose, so that the infusion process is realized, when the liquid medicine in the current medicine bottle is injected, the liquid in the drip tube is gradually reduced, the buoyancy received by the liquid stopping ball is smaller than the gravity of the liquid stopping ball, the liquid stopping ball slides under the gravity effect and is abutted against the communicating part of the drip tube, so that preliminary liquid stopping is realized, when the liquid stopping ball is not blocked by the infusion hose in time, the liquid stopping component starts to stop the liquid medicine again, and the liquid stopping is reduced by the liquid pressure is smaller than the probability of the vein pressure, so that the probability of the liquid column is reduced, the probability that blood returns in the infusion process is reduced, so that the probability that the infusion process is bad to cause to the health of a human body is reduced.

Drawings

FIG. 1 is a schematic overall structure of the present application;

FIG. 2 is a schematic structural view of the connection assembly of the present application, with the connection tube partially sectioned;

FIG. 3 is a schematic view of the exhaust assembly of the present application, with the first exhaust pipe, the second exhaust pipe, and the drip pipe all partially sectioned;

FIG. 4 is a cross-sectional view of a filter cartridge of the present application;

fig. 5 is a schematic structural view of the alarm mechanism in the present application.

Reference numerals: 1. an infusion hose; 11. a bottle stopper puncture needle; 111. a protective sleeve; 12. a water stop clamp; 13. a dropper; 14. a flow rate regulator; 15. a venous needle; 2. a liquid stopping mechanism; 21. a liquid stopping ball; 22. a filter box; 221. a first cavity; 222. a second cavity; 23. a liquid stopping component; 231. a first filter membrane; 232. a second filter membrane; 24. an exhaust hole; 3. a connection assembly; 31. a connecting pipe; 311. a protective shell; 32. a butt joint pipe; 33. a connector; 34. a one-way valve; 35. a rotating piece; 4. an exhaust assembly; 41. a first exhaust pipe; 411. a breathable water-stop film; 42. a second exhaust pipe; 43. an exhaust cover; 5. an alarm mechanism; 51. a clamping plate; 511. a control board; 512. a clamping groove; 52. a photoelectric sensor; 53. an alarm assembly; 531. a control switch; 532. an alarm.

Detailed Description

The present application is described in further detail below in conjunction with figures 1-5.

The embodiment of the application discloses an infusion apparatus capable of preventing blood return.

Referring to fig. 1, an infusion apparatus for preventing blood return includes an infusion hose 1, wherein the interior of the infusion hose 1 is hollow and is used for delivering a liquid medicine, and the vertical state of the infusion hose 1 is taken as an example for illustration; the bottle stopper puncture needle 11 is fixedly arranged at the top end of the infusion hose 1, and the protective sleeve 111 for protecting the bottle stopper puncture needle 11 is clamped and arranged at the top end of the infusion hose 1; a water stop clamp 12 is slidably arranged on the infusion hose 1, the water stop clamp 12 is positioned below the bottle stopper puncture needle 11, and the water stop clamp 12 is a pressing water stop clamp 12 in the prior art; a dropper 13 is fixedly arranged on the infusion hose 1, the dropper 13 is positioned below the water stop clamp 12 and is used for temporarily storing liquid medicine, and the dropper 13 is communicated with the infusion hose 1 and is in a vertical state; the infusion hose 1 is provided with a flow rate regulator 14 and a vein needle 15, the flow rate regulator 14 is positioned below the dropper 13, and the vein needle 15 is arranged at the bottom end of the infusion hose 1; the infusion hose 1 is provided with a liquid stopping mechanism 2.

Referring to fig. 1 and 2, the intravenous needle 15 is detachably arranged on the infusion hose 1 through the connection assembly 3, the connection assembly 3 comprises a connection pipe 31 and a butt joint pipe 32, the connection pipe 31 is fixedly arranged on the intravenous needle 15, and a protection shell 311 for protecting the intravenous needle 15 is clamped and arranged on the connection pipe 31; a connector 33 is fixedly arranged at one end of the connecting pipe 31 far away from the vein needle 15, and an internal thread is arranged on the connector 33; the butt joint pipe 32 is fixedly arranged at the bottom end of the infusion hose 1, external threads are arranged on the butt joint pipe 32, and the butt joint pipe 32 is in threaded connection with the inner wall of the connecting pipe 31.

Referring to fig. 1 and 2, a check valve 34 is fixedly installed at one end of the connection tube 31 near the connection head 33, and the check valve 34 is used for controlling the liquid medicine to flow to the intravenous needle 15 only; one end of the connecting pipe 31, which is close to the connecting head 33, is fixedly provided with two rotating pieces 35 which are convenient to rotate, and a plurality of anti-skid protruding points are fixedly arranged on the rotating pieces 35 at intervals.

Referring to fig. 1 and 3, an exhaust assembly 4 is provided on the infusion hose 1, the exhaust assembly 4 includes a first exhaust pipe 41, a second exhaust pipe 42 and an exhaust cover 43, the first exhaust pipe 41 is fixedly installed at the top end of the infusion hose 1, and the first exhaust pipe 41 is communicated with the bottle stopper puncture needle 11 through the infusion hose 1; the second exhaust pipe 42 is fixedly arranged on the outer side wall of the dropper 13 and is communicated with the interior of the dropper 13, the second exhaust pipe 42 is in a horizontal state, and the distance between the second exhaust pipe 42 and the top end of the dropper 13 is one third of the height of the dropper 13; the first exhaust pipe 41 and the second exhaust pipe 42 are fixedly provided with an air-permeable water-stopping film 411; an exhaust cover 43 is rotatably mounted on the end of the second exhaust pipe 42 remote from the drop tube 13, and the exhaust cover 43 is used for blocking the second exhaust pipe 42.

Referring to fig. 1 and 3, the bottle stopper puncture needle 11 is inserted into a liquid medicine bottle, liquid medicine flows, air in the liquid medicine is partially discharged through the first exhaust pipe 41, the water stop clamp 12 is opened, the exhaust cover 43 is rotated to open the second exhaust pipe 42, the second exhaust pipe 42 is communicated with the outside and the infusion hose 1, at the moment, the liquid medicine directly flows into the drip tube 13 under the action of self gravity, the drip tube 13 is not required to be extruded, thereby improving the convenience of liquid medicine conveying, and simultaneously, the air in the drip tube 13 is discharged through the second exhaust pipe 42, when the liquid level of the liquid medicine is higher than that of the second exhaust pipe 42, the exhaust cover 43 is rotated to shield the second exhaust pipe 42, the flow speed regulator 14 is opened, and the liquid medicine flows to the vein needle 15, so that the air is discharged, thereby reducing the probability of air bubbles entering veins of a human body, and thus reducing the probability of adverse effects on human health in the infusion process.

Referring to fig. 1 and 3, the liquid stopping mechanism 2 comprises a liquid stopping ball 21, a filter box 22 and a liquid stopping component 23, wherein the liquid stopping ball 21 is vertically slidably arranged in the drip tube 13, the diameter of the liquid stopping ball 21 is larger than that of the infusion hose 1, when no liquid medicine exists in the drip tube 13, the liquid stopping ball 21 abuts against the joint of the bottom end of the drip tube 13 and the infusion hose 1 under the action of gravity, and the liquid stopping ball 21 is used for blocking and stopping liquid at the joint of the drip tube 13 and the infusion hose 1.

Referring to fig. 1 and 4, the filter box 22 is fixedly installed on the infusion hose 1 and located between the dropper 13 and the flow rate regulator 14, and an exhaust hole 24 is formed in the outer side wall of the filter box 22, and the exhaust hole 24 is communicated with the inside of the filter box 22.

Referring to fig. 1 and 4, the liquid stopping assembly 23 is disposed on the filter box 22 and is used for filtering and stopping the liquid medicine, the liquid stopping assembly 23 comprises a first filter membrane 231 and a second filter membrane 232, the first filter membrane 231 is vertically and fixedly installed in the filter box 22, the first filter membrane 231 divides the filter box 22 into a first cavity 221 and a second cavity 222, the first filter membrane 231 is used for filtering impurities and particles in the liquid medicine, the first cavity 221 is communicated with the dropper 13 through the infusion hose 1 and is used for temporarily storing unfiltered liquid medicine, and the air discharging hole 24 is communicated with the first cavity 221 and is used for discharging air; the second cavity 222 is communicated with the intravenous needle 15 through the infusion hose 1 and is used for temporarily storing the filtered liquid medicine.

Referring to fig. 1 and 4, the second filter 232 is fixedly installed on the exhaust hole 24, and the second filter 232 is a filter having water blocking and air permeable properties, the second filter 232 being for discharging gas while blocking the escape of the liquid medicine through the exhaust hole 24.

Referring to fig. 3 and 4, the bottle stopper puncture needle 11 is inserted into a medicine bottle, the medicine flows, the air in the medicine is partially discharged through the first exhaust pipe 41, the water stop clamp 12 is opened, the exhaust cover 43 is rotated to open the second exhaust pipe 42, the second exhaust pipe 42 is communicated with the outside and the transfusion hose 1, the medicine directly flows into the drip tube 13 under the action of gravity of the medicine at the moment, the air in the drip tube 13 is discharged through the second exhaust pipe 42, the water stop ball 21 is subjected to buoyancy to be far away from the transfusion hose 1 along with the rising of the liquid level of the medicine in the drip tube 13, the drip tube 13 is communicated with the transfusion hose 1 at the moment, the flow speed regulator 14 is opened, and the medicine flows to the filter box 22 through the transfusion hose 1.

Referring to fig. 3 and 4, when the remaining amount of the medicine liquid is large, the medicine liquid is filled in the first cavity 221 through the infusion hose 1, the gas in the medicine liquid is discharged through the exhaust hole 24, the medicine liquid in the first cavity 221 is filtered through the first filter membrane 231 under the pressure of the subsequent medicine liquid and then enters the second cavity 222, and the medicine liquid in the second cavity 222 enters the intravenous needle 15 under the action of the subsequent medicine liquid; when the injection of the liquid medicine in the prior medicine bottle is completed, the liquid medicine in the dropper 13 is gradually reduced, the buoyancy received by the liquid stopping ball 21 is smaller and smaller, and when the buoyancy is smaller than the gravity of the liquid stopping ball 21, the liquid stopping ball 21 slides under the action of the gravity and abuts against the communicating part of the dropper 13 and the infusion hose 1, so that preliminary liquid stopping is realized.

Referring to fig. 3 and 4, after impurities occur in the liquid medicine, the liquid medicine in the first cavity 221 gradually decreases after the liquid stopping ball 21 cannot stop the liquid in time, the pressure received by the liquid medicine in the second cavity 222 gradually decreases, under the action of the surface tension of the first filter membrane 231 and the second filter membrane 232, the hydrostatic pressure and the gravity pressure acting force in the wall of the infusion hose 1 are balanced with the tension of the first filter membrane 231 and the second filter membrane 232, namely, the liquid medicine is kept still in the infusion hose 1 under the comprehensive acting force of the atmospheric pressure, the hydrostatic pressure and the vein of the human body, so that the function of automatic liquid stopping is achieved; the first filter membrane 231 and the second filter membrane 232 are matched with the liquid stopping ball 21, so that the probability that the water column pressure is smaller than the venous pressure is reduced, and the probability of blood return in the infusion process is reduced; meanwhile, the gas in the liquid medicine is discharged, so that the probability of bubbles entering the veins of the human body is reduced, and the probability of adverse effects on the health of the human body in the infusion process is reduced.

Referring to fig. 1 and 5, an alarm mechanism 5 is arranged on an infusion hose 1, the alarm mechanism 5 comprises a clamping plate 51, a photoelectric sensor 52 and an alarm component 53, the clamping plate 51 is in a vertical state, a circuit control board 511 is fixedly arranged in the clamping plate 51, a vertical clamping groove 512 is formed in the outer side wall of the clamping plate 51, and the clamping groove 512 penetrates through the upper surface and the lower surface of the clamping plate 51 and is used for allowing the infusion hose 1 to pass through; the clamping plate 51 clamps the infusion hose 1 between the filter cartridge 22 and the flow rate regulator 14, and the infusion hose 1 abuts against the inner wall of the clamping groove 512.

Referring to fig. 1 and 5, the photoelectric sensors 52 are fixedly installed on the clamping plate 51 at both sides of the infusion hose 1 and electrically connected with the control board 511, and the photoelectric sensors 52 are used for detecting the flow condition of the liquid medicine in the infusion hose 1; an alarm assembly 53 is provided on the clamping plate 51 and is electrically connected to the photoelectric sensor 52 and is used for alarm.

Referring to fig. 1 and 5, the alarm assembly 53 includes a control switch 531 and an alarm 532, the control switch 531 is installed on the outer surface of the grip plate 51 and electrically connected to the control board 511, and the control switch 531 controls the on/off of the photoelectric sensor 52 through the control board 511; the alarm 532 is fixedly installed on the outer sidewall of the grip plate 51 and is electrically connected with the control board 511.

Referring to fig. 1 and 5, the clamping plate 51 is clamped on the infusion hose 1, after the air exhaust is completed, the control switch 531 is turned on, the photoelectric sensor 52 detects the flow condition of the liquid in the infusion hose 1 in real time, when no liquid medicine flows in the infusion hose 1, the alarm 532 gives an alarm, after the use is completed, the clamping plate 51 is stirred to separate from the infusion hose 1, and the secondary use is reserved, so that the monitoring convenience of the infusion process is improved.

The working principle of the embodiment of the application is as follows:

the bottle stopper puncture needle 11 is inserted into a medicine bottle, medicine liquid flows, air in the medicine liquid is partially discharged through the first exhaust pipe 41, the water stop clamp 12 is opened, the exhaust cover 43 is rotated simultaneously to enable the second exhaust pipe 42 to be opened, the second exhaust pipe 42 is communicated with the outside and the transfusion hose, at the moment, the medicine liquid directly flows into the drip tube 13 under the action of gravity of the medicine liquid, at the same time, gas in the drip tube 13 is discharged through the second exhaust pipe 42, along with the rising of the liquid level of the medicine liquid in the drip tube 13, the water stop ball 21 is subjected to buoyancy and is far away from the transfusion hose 1, at the moment, the drip tube 13 is communicated with the transfusion hose 1, the flow speed regulator 14 is opened, and the medicine liquid flows to the filter box 22 through the transfusion hose 1.

When the residual quantity of the liquid medicine is large, the liquid medicine is filled in the first cavity 221 through the infusion hose 1, the gas in the liquid medicine is discharged through the exhaust hole 24, the liquid medicine in the first cavity 221 enters the second cavity 222 after being filtered by the first filter membrane 231 under the pressure of the subsequent liquid medicine, and the liquid medicine in the second cavity 222 enters the intravenous needle 15 under the action of the subsequent liquid medicine; when the injection of the liquid medicine in the prior medicine bottle is completed, the liquid medicine in the dropper 13 is gradually reduced, the buoyancy received by the liquid stopping ball 21 is smaller and smaller, and when the buoyancy is smaller than the gravity of the liquid stopping ball 21, the liquid stopping ball 21 slides under the action of the gravity and abuts against the communicating part of the dropper 13 and the infusion hose 1, so that preliminary liquid stopping is realized.

When impurities appear in the liquid medicine to cause that the liquid stopping ball 21 can not stop liquid in time, the liquid medicine in the first cavity 221 gradually decreases, the pressure born by the liquid medicine in the second cavity 222 gradually decreases, under the action of the surface tension of the first filter membrane 231 and the second filter membrane 232, the hydrostatic pressure and the gravity pressure acting force in the wall of the transfusion hose 1 are balanced with the tension of the first filter membrane 231 and the second filter membrane 232, namely, the liquid medicine is kept still in the transfusion hose 1 under the comprehensive acting force of atmospheric pressure, hydrostatic pressure and human veins, so that the function of automatic liquid stopping is achieved; the first filter membrane 231 and the second filter membrane 232 are matched with the liquid stopping ball 21, so that the probability that the water column pressure is smaller than the venous pressure is reduced, and the probability of blood return in the infusion process is reduced; meanwhile, the gas in the liquid medicine is discharged, so that the probability of bubbles entering the veins of the human body is reduced, and the probability of adverse effects on the health of the human body in the infusion process is reduced.

The foregoing are all preferred embodiments of the present application, and are not intended to limit the scope of the present application in any way, therefore: all equivalent changes in structure, shape and principle of this application should be covered in the protection scope of this application.

Claims (8)

1. The utility model provides an infusion set of preventing back blood, includes infusion hose (1), be provided with bottle plug pjncture needle (11), stagnant water clamp (12), burette (13), velocity of flow regulator (14) and vein needle (15) on infusion hose (1), its characterized in that: be provided with on the infusion hose (1) and end liquid mechanism (2), end liquid mechanism (2) include:

the liquid stopping ball (21) is arranged on the dropper (13) in a sliding manner, is abutted against the infusion hose (1) and is used for stopping liquid at the joint of the dropper (13) and the infusion hose (1);

the filter box (22) is arranged on the infusion hose (1) and is positioned below the dropper (13);

and the liquid stopping component (23) is arranged on the filtering box (22) and is used for filtering and stopping liquid medicine.

2. An anti-flashback infusion set in accordance with claim 1, wherein: the filter box (22) is provided with an exhaust hole (24); the liquid stop assembly (23) comprises:

the first filter membrane (231) is arranged in the filter box (22) and is used for filtering the liquid medicine, the first filter membrane (231) divides the filter box (22) into a first cavity (221) and a second cavity (222), and the first cavity (221) is communicated with the dropper (13) and is used for temporarily storing the unfiltered liquid medicine; the second cavity (222) is communicated with the intravenous needle (15) and is used for temporarily storing the filtered liquid medicine;

and the second filter membrane (232), the second filter membrane (232) is arranged on the exhaust hole (24), and the second filter membrane (232) is used for blocking the liquid medicine from overflowing.

3. An anti-flashback infusion set in accordance with claim 2, wherein: an exhaust assembly (4) is arranged on the infusion hose (1), and the exhaust assembly (4) comprises:

the first exhaust pipe (41) is arranged on the infusion hose (1) and is communicated with the bottle stopper puncture needle (11);

the second exhaust pipe (42) is arranged on the dropper (13) and is communicated with the interior of the dropper (13), and the first exhaust pipe (41) and the second exhaust pipe (42) are both provided with breathable water-stopping films (411);

and an exhaust cover (43), wherein the exhaust cover (43) is rotatably arranged on the second exhaust pipe (42) and is used for shielding the second exhaust pipe (42).

4. An anti-flashback infusion set in accordance with claim 2, wherein: an alarm mechanism (5) is arranged on the infusion hose (1), and the alarm mechanism (5) comprises:

the clamping plate (51) is clamped on the infusion hose (1) and is positioned at one end of the filter box (22) far away from the dropper (13);

the photoelectric sensor (52) is arranged on the clamping plate (51) and is used for detecting the flowing condition of the liquid medicine in the infusion hose (1);

and the alarm assembly (53) is arranged on the clamping plate (51), is electrically connected with the photoelectric sensor (52) and is used for alarming.

5. The blood return prevention infusion set according to claim 4, wherein: the alarm assembly (53) comprises:

a control switch (531), wherein the control switch (531) is arranged on the clamping plate (51), is electrically connected with the photoelectric sensor (52), and is used for controlling the opening and closing of the photoelectric sensor (52);

and an alarm (532), wherein the alarm (532) is arranged on the clamping plate (51) and is electrically connected with the photoelectric sensor (52).

6. An anti-flashback infusion set in accordance with claim 1, wherein: the intravenous needle (15) is detachably arranged on the infusion hose (1) through a connecting component (3), and the connecting component (3) comprises:

a connection tube (31), the connection tube (31) being arranged on the intravenous needle (15);

the butt joint pipe (32) is arranged on the infusion hose (1) and is connected with the connecting pipe (31) in a threaded mode.

7. The blood return prevention infusion set according to claim 6, wherein: the connecting pipe (31) is provided with a one-way valve (34) which controls the liquid medicine to only flow to the intravenous needle (15).

8. The blood return prevention infusion set according to claim 6, wherein: the connecting pipe (31) is provided with a rotating piece (35) which is convenient to rotate.

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