WO2014000494A1

WO2014000494A1 - Self-stopping type precision filter infusion apparatus capable of preventing blood return

Info

Publication number: WO2014000494A1
Application number: PCT/CN2013/074054
Authority: WO
Inventors: 张煜佳
Original assignee: 电白县康尔美生物科技有限公司
Priority date: 2012-06-26
Filing date: 2013-04-11
Publication date: 2014-01-03
Also published as: CN102688533B; CN102688533A

Abstract

A self-stopping type precision filter infusion apparatus capable of preventing blood return comprises a drip chamber (1), a bottle plug puncture device (15) and catheters (2,16). A precision filter is arranged within a lower portion of the drip chamber (1). The precision filter is provided with an air diaphragm (12), a selective infusion device and a filter mounting base (8). The air diaphragm (12) is arranged at the bottom end of the filter mounting base (8) or at the bottom of the portion of drip chamber (1) arranged under the filter mounting base. The selective infusion device is fixed on the filter mounting base (8). The filter mounting base (8) is connected to the bottom of the drip chamber (1) and is communicated with an output end of the drip chamber (1). The selectively infusion device is provided with a hydrophilic diaphragm (13), and also comprises a first infusion pipe (7), a second infusion pipe (10) and a continuous liquid supply orifice (11) which are arranged on the filter mounting base (8), respectively. The heights of liquid inlet end surfaces of the second infusion pipe (10), the first infusion pipe (7) and the continuous liquid supply orifice (11) reduce sequentially, and the liquid inlet end surfaces are communicated with the output end of the drip chamber (1), respectively. The liquid inlet end surface of the continuous liquid supply orifice (11) is positioned at the bottom of the filter mounting base (8). The drip chamber (1) can also comprise a liquid inlet pipeline (3) and an exhaustion pipeline (4), and the height of the liquid outlet end of the liquid inlet pipeline (3) is more than that of the air intake end of the exhaustion pipe (4). With said structure, the phenomenon of blood return can be avoided, and the apparatus is simple in structure and convenient to operate.

Description

Self-stop anti-return blood precision filtration infusion device

Technical field

The invention relates to an infusion set technology, in particular to a self-stop type anti-return blood precision filtering infusion set. Background technique

In the course of clinical treatment, many patients often need to infusion to treat diseases and rescue critically ill patients through infusion. Therefore, a large amount of infusion sets are required in clinical treatment.

In the prior art, the conventional infusion set generally requires the caregiver to change the liquid or remove the needle in time after the liquid infusion of the infusion bag or the infusion bottle is completed. If you do not change the fluid or pull the needle in time, there will always be a phenomenon of blood backflow. Especially when it is negligent or too late to replace a new liquid or blood, the air will enter the lower tube of the infusion set, which will lead to unexpected blood return. The occurrence of blood return will not only cause the catheter to be incontinently used for infusion due to bubble embolism, but may even cause blood to coagulate and form blood clots into the human body, thereby causing harm to the human body, and serious medical accidents such as iatrogenic infections and sepsis. . Therefore, how to solve this kind of problem and the adverse consequences of its treatment in clinical treatment has always been a difficult problem for medical staff and infusion manufacturers.

In the prior art, the general treatment methods for the above problems are often focused on how to quickly wind the catheter exhaust, remove the infusion needle for exhaust, and the like. These operations are often very cumbersome, requiring not only experienced medical personnel to operate, but also prone to accidents such as pull-out accidents. Therefore, not only the liquid medicine is wasted, but also the iatrogenic infection is easily caused, and even if the treatment is performed by such a method, only the problem of reinfusion can be solved, and the risk of thrombosis such as venous embolism and other blood vessel embolism caused by blood clots can be solved. The risk of serious injuries such as iatrogenic infections and sepsis is still not fundamentally resolved.

At present, although some anti-return blood precision infusion sets have appeared on the market, generally through the infusion bag or After the liquid infusion of the infusion bottle is completed, the liquid in the dripper is delayed to be delivered to the lower catheter, so that the medical staff has enough time to change or withdraw the needle for the patient to prevent the air from entering the lower catheter to cause blood return. However, its structure is more complicated, and the filter can prevent air from entering, but the filtering effect is not good. Moreover, when the dripper is initially charged, the liquid level in the dripper is often completely drained, so that the liquid level of the liquid is as high as or exceeds the inlet port, and the drip rate cannot be observed, and the drip tray is required to be squeezed during the initial liquid inlet. Air aspirate, or upside down the dripper to reduce the drip rate, making the operation very inconvenient.

Therefore, in view of the problems existing in the prior art, it is urgent to provide a self-stopping anti-return blood precision filtration infusion technology capable of effectively stopping, preventing blood return, simple structure, and convenient operation, so as to solve the shortcomings of the prior art. As necessary.

Summary of the invention

SUMMARY OF THE INVENTION The object of the present invention is to provide a self-stopping anti-return blood precision infusion infusion device which can effectively prevent the occurrence of blood return, has a simple structure and is convenient to operate, in order to avoid the deficiencies in the prior art.

The object of the invention is achieved by the following technical solutions:

Providing a self-stopping anti-return blood precision infusion device, comprising a dripper, a bottle stopper, a catheter, wherein: the lower part of the dripper is provided with a precision filter, the precision filter is provided with an air diaphragm, and is used for a selection infusion device and a filter mount for adjusting an infusion flow rate, the air diaphragm being disposed at a bottom end of the filter mount or at a bottom of a drip chamber below a bottom end of the filter mount, the selected infusion device being fixed In the filter mount, the filter mount is connected to the bottom of the dropper and communicates with the output end of the dripper, the selective infusion device is provided with a hydrophilic membrane, and the selective infusion device comprises The first infusion tube, the second infusion tube and the continuous liquid supply hole, wherein the heights of the liquid inlet end faces of the second infusion tube, the first infusion tube and the continuous liquid supply hole are sequentially lowered, the first infusion solution The tube, the second infusion tube and the continuous liquid supply hole are respectively disposed in the filter mounting seat, and the first infusion tube, the second infusion tube and the continuous liquid supply hole respectively are separated from the drop Bucket output Through the continuous feed of the fluid supply hole located at the bottom level of the filter mount. Wherein, the hydrophilic membrane is disposed at the lower port of the continuous liquid supply hole, and the hydrophilic membrane is connected to the filter mount by ultrasonic welding.

Wherein the hydrophilic membrane is disposed on the continuous liquid supply port and the filter mount is ultrasonically welded, and/or the hydrophilic membrane is disposed on the continuous liquid supply flow channel wall The filter mount is ultrasonically welded.

Wherein, the second infusion tube is provided with an automatic exhausting groove, the automatic exhausting groove is radially opened along the wall of the second infusion tube, and communicates with the pipeline of the second infusion tube, the automatic exhausting The liquid end of the bottom of the tank.

Wherein, the automatic venting groove is provided with three, evenly distributed on the wall of the second infusion tube, and the top end of the second infusion tube is provided with a top cover, the top cover and the second The upper end of the infusion tube is fixedly connected.

Wherein, the lower port of the second infusion tube is provided with a hydrophilic membrane, and the hydrophilic membrane is connected to the second infusion tube lower port or the filter mount by ultrasonic welding.

Wherein the lower port of the first infusion tube is provided with a hydrophilic membrane, the hydrophilic membrane is connected to the lower port of the first infusion tube or the filter mount by ultrasonic welding, or the first infusion The upper port of the tube is connected with a hydrophilic membrane by ultrasonic welding, or the hydrophilic surface of the first infusion tube is connected by ultrasonic welding.

Wherein, the air diaphragm is disposed at a bottom end of the filter mount, and the air diaphragm is connected to the bottom end of the filter mount by ultrasonic welding.

Wherein, the dripper is provided with an inlet pipe and an exhaust pipe, and the inlet pipe runs from the inside to the outside to communicate with the stopper punctor at the top of the dripper, and the exhaust pipe passes through from the inside to the outside The top of the drip chamber is in communication with the exhaust port, and the height of the outlet port of the inlet conduit is higher than the height of the intake port of the exhaust conduit.

Wherein the top of the dripper is provided with an end cap, the end cap is sealingly connected with the top of the dripper, and the inlet pipe passes through the end cap and communicates with the cork piercer. The exhaust duct passes through the inside out An end cap is in communication with the exhaust port.

In actual use, an upper conduit may be disposed between the stopper punctator and the dripper, and the stopper puncturing device, the upper conduit, and the inlet conduit are sequentially connected to be electrically connected.

The beneficial effects of the invention:

The self-stopping anti-return blood precision infusion infusion device of the invention comprises a drip bucket, a cork puncture device and a conduit, wherein: a lower part of the dripper is provided with a precision filter, and the precision filter is provided with an air diaphragm for adjusting the infusion flow rate Selecting the infusion device and the filter mount, the air diaphragm is disposed at the bottom end of the filter mount or at the bottom of the drip bucket below the bottom end of the filter mount, and the infusion device is fixed to the filter mount, and the filter is selected. The device mount is connected to the lower part of the dripper and communicates with the output end of the dripper. The infusion device is selected to be provided with a hydrophilic membrane. The infusion device comprises a first infusion tube, a second infusion tube and a continuous liquid supply hole, and the second infusion solution The heights of the inlet end faces of the tube, the first infusion tube and the continuous liquid supply hole are sequentially lowered, and the first infusion tube, the second infusion tube and the continuous liquid supply hole are respectively disposed in the filter mounting seat, the first infusion tube and the second infusion solution The tube and the continuous liquid supply hole are respectively communicated with the output end of the drip bucket, and the liquid inlet surface of the continuous liquid supply hole is located at the bottom of the filter mount. Therefore, under the premise of ensuring high-efficiency filtration, when the liquid infusion of the infusion bag or the infusion bottle is completed, the liquid in the dripper can still be instilled slowly and gradually, due to the tension of the liquid and the gas and the air. The function of the diaphragm effectively prevents air from entering the downcomer, and only allows the liquid to pass through and enter the lower duct, thereby realizing self-stop and effectively preventing the occurrence of blood returning, and the structure is simple and the operation is convenient.

Moreover, due to the self-stopping anti-return blood precision infusion infusion device of the present invention, the drip bucket is provided with an inlet pipe and an exhaust pipe, and the inlet pipe is connected from the inside to the outside of the dripper to communicate with the cork piercer. The gas pipe runs from the inside to the outside of the dripper to communicate with the exhaust port, and the height of the liquid outlet port of the inlet pipe is higher than the height of the intake port of the exhaust pipe. Thereby, a high-low inlet pipe and an exhaust pipe can form a sealed equilibrium air pressure chamber in the drip bucket, so as to conveniently observe the dripping speed of the liquid inlet pipe, and the liquid does not appear due to the complete exhaust of the air. The liquid level is as high as or exceeds the inlet port and the drip rate cannot be observed. The drip bucket does not need to be sucked and sucked by the pinch pressure. To invert the drip bucket to reduce the drip rate, simply insert the stopper puncture device into the infusion bag or the infusion bottle, and the exhaust gas can be automatically filled to make the operation more convenient.

DRAWINGS

The invention is further illustrated by the drawings, but the embodiments of the drawings are not to be construed as limiting.

1 is a schematic view showing the structure of a self-stopping anti-return blood precision infusion infusion set of the present invention.

2 is a schematic view showing the structure of a precision filter of a self-stopping anti-return blood precision infusion infusion device of the present invention. Fig. 3 is a schematic view showing the structure of a precision filter of a self-stop type anti-return blood precision infusion set according to the present invention.

Fig. 4 is a schematic view showing the structure of a sixth embodiment of a self-stopping anti-bleeding precision filtration infusion set of the present invention. Fig. 5 is a schematic view showing the structure of a second embodiment of a self-stopping anti-bleeding precision filtration infusion set of the present invention. In Figure 1, Figure 2, Figure 3, Figure 4, Figure 5, it includes:

1 drip bucket, 2 upper ducts, 3 inlet ducts, 4 exhaust ducts,

5 exhaust port, 6 top cover, 7 first infusion tube, 8 filter mount,

9 automatic exhaust vent, 10 second infusion tube, 11 continuous supply holes,

12 air diaphragm, 13 hydrophilic diaphragm, 14 end cap, 15 stopper puncturing device,

16 lower catheter.

detailed description

The invention is further described in detail in conjunction with the following examples.

Example 1

The self-stopping anti-return blood precision infusion infusion device of the present invention, as shown in FIG. 1, FIG. 2, FIG. 3 and FIG. 4, comprises a dripper 1, a stopper puncture device 15, an upper catheter 2 and a lower catheter 16, wherein: The lower part of the bucket 1 is provided with a precision filter, the precision filter is provided with an air diaphragm 12, a selection infusion device for adjusting the infusion flow rate, and a filter The air block 12 is disposed at the bottom end of the filter mount or at the bottom of the drip bucket below the bottom end of the filter mount. The infusion device is fixed to the filter mount 8, and the filter mount is connected. In the lower part of the dripper 1 and connected to the output end of the dripper 1, the infusion device is selected to be provided with a hydrophilic membrane 13, and the infusion device comprises a first infusion tube 7, a second infusion tube 10 and a continuous liquid supply hole 11, The heights of the liquid inlet end faces of the second infusion tube 10, the first infusion tube 7, and the continuous liquid supply hole 11 are sequentially lowered, and the first infusion tube 7, the second infusion tube 10, and the continuous liquid supply hole 11 are respectively disposed in the filter mounting seat 8. The first infusion tube 7, the second infusion tube 10 and the continuous liquid supply hole 11 communicate with the output end of the drip chamber 1, respectively, and the liquid inlet surface of the continuous liquid supply hole 11 is located at the bottom of the filter mount 8.

The above structure can ensure the high-efficiency filtration, when the liquid infusion of the infusion bag or the infusion bottle is completed, the liquid in the dripper can still be instilled slowly and gradually, due to the tension of the liquid and the gas and the air diaphragm. The function effectively prevents air from entering the downcomer, and only allows the liquid to pass through and enter the lower duct, thereby realizing self-stop and effectively preventing the occurrence of blood returning, and the structure is simple and the operation is convenient.

In particular, the purpose of providing a combination of a continuous liquid supply port and a hydrophilic membrane is to allow the liquid to slowly penetrate into the hydrophilic membrane through the continuous liquid supply hole of the microporous structure, so as to continuously and slowly supply liquid, instead of immediately Stop the liquid supply and achieve the true anti-return function.

Specifically, the hydrophilic membrane 13 may be disposed at the lower port of the continuous liquid supply hole 11, and the hydrophilic membrane 13 and the filter mount 8 are ultrasonically welded.

The hydrophilic membrane 13 may also be disposed on the continuous liquid supply port 11 and connected to the filter mount 8 by ultrasonic welding;

Alternatively, the hydrophilic membrane 13 may be disposed on the flow path wall surface of the continuous liquid supply hole 11 and ultrasonically welded to the filter mount.

Further, it is also possible to provide a combination of the lower port of the continuous liquid supply port 11, the flow path wall surface, and the upper port.

The hydrophilic membrane is a type of ultrafiltration membrane that can filter the drug solution under a small pressure. When the liquid level is lower than the first infusion tube, the continuous liquid supply hole is slowly supplied with liquid, and the liquid in the continuous liquid supply hole is slowly permeated through the hydrophilic membrane, and the flow rate is relatively high. Low, due to the tension between liquid and gas, effectively prevents air from entering the output end of the dripper through the precision filter, which really plays a role in preventing blood return.

Due to the above structure, automatic exhaust, automatic liquid stop, continuous slow liquid supply, and anti-return function can be realized. The structure can automatically stop the air from entering the output end of the dripper after the infusion, and after the liquid in the infusion bag or the infusion bottle and the liquid in the dripper are finished, the infusion device can be continuously supplied with the liquid slowly, and the liquid can be continuously supplied. Time, when the slow liquid supply is completed, the infusion will be completely stopped, and at this time the air cannot pass the selection of the infusion device. At the same time, the infusion device has an automatic venting function when initially injecting liquid before infusion, which can provide medical personnel with a longer supervision time to avoid medical accidents.

Specifically, the second infusion tube 10 is provided with an automatic venting groove 9 which is opened radially along the wall of the second infusion tube 10 and communicates with the pipeline of the second infusion tube 10, and the automatic venting groove 9 The liquid end at the bottom. Therefore, when the second infusion tube is in the liquid, the air is quickly discharged laterally through the automatic exhausting groove, thereby preventing the exhaust gas from forming a resistance to the influent to affect the dropping speed or causing the air bubble to block.

Specifically, the automatic venting groove 9 is provided with three, evenly distributed on the wall of the second infusion tube 10, and the upper end of the second infusion tube is provided with a top cover, and the top cover is fixedly connected with the upper end of the second infusion tube . Therefore, when the second infusion tube is in the liquid, the air is quickly discharged through the lateral distribution of the three automatic exhaust grooves uniformly distributed, and the exhaust gas is prevented from affecting the formation resistance of the influent to influence the drip rate or cause the air bubble to block, and the exhaust gas is exhausted. The effect is better; at the same time, the setting of the top cover can not only strengthen the rigidity of the second infusion tube to open the automatic venting groove portion, but also avoid the direct collision of the liquid and the gas to cause air bubbles to enter the second infusion tube.

Moreover, the wall of the second infusion tube 10 can also be opened with three or more evenly distributed automatic venting grooves 9, such as four, five or six, and the like.

In addition, the bottoms of the plurality of automatic venting grooves 9 can also be arranged from high to low, respectively, to form a stepped liquid stop.

^Mountain

3⁄4. In the selection of the infusion device, the highest infusion end face is the second infusion tube, when the liquid level in the dripper is higher than the second infusion At the lowest liquid stopping end of the liquid pipe, the first infusion tube, the second infusion tube and the continuous liquid supply hole are simultaneously infused to ensure the flow rate of the infusion flow rate; when the liquid level is lower than the lowest liquid stopping end of the second infusion tube and higher than When the first infusion tube is at the liquid inlet end, the first infusion tube and the continuous liquid supply hole are simultaneously infused slowly; when the liquid level is lower than the liquid inlet end of the first infusion tube, the continuous liquid supply hole is slowly supplied with liquid.

The lower port of the second infusion tube 10 may further be provided with a hydrophilic membrane 13, and the hydrophilic membrane 13 may be ultrasonically welded to the lower port of the second infusion tube or the filter mount.

Specifically, the dripper 1 is provided with an inlet pipe 3 and an exhaust pipe 4, and the inlet pipe 3 passes through the inside and the outside of the dripper 1 to communicate with the stopper puncture device 15, and the exhaust pipe 4 passes through the dripper from the inside to the outside. The top of the 1 is in communication with the exhaust port 5, and the height of the outlet port of the inlet duct 3 is higher than the height of the intake port of the exhaust duct 4. The function of the automatic venting structure at the top of the dripper 1 can be used to directly change the dressing and then infuse after infusion. There is no need to squeeze the dripper 1 again to complete the infusion.

Thereby, a high-low inlet pipe and an exhaust pipe can form a sealed equilibrium air pressure chamber in the drip bucket, so as to conveniently observe the dripping speed of the liquid inlet pipe, and the liquid does not appear due to the complete exhaust of the air. The liquid level is as high as or exceeds the liquid inlet and the drip speed cannot be observed. The drip bucket does not need to be sucked and sucked by the pinch pressure, and the drip bucket is not required to reduce the liquid to observe the drip rate. Insert the infusion bag or infusion bottle to automatically complete the exhaust gas inlet, making it easier to operate.

Example 2

Embodiment 2 of the self-stopping anti-return blood precision infusion infusion device of the present invention, as shown in FIG. 5, the difference between Embodiment 2 and Embodiment 1 is that: the top of the drip bucket 1 is provided with an end cap 14, the end cap 14 and the drip bucket 1 The top sealing connection, the inlet conduit 3 is communicated from the inner and outer end caps 14 to the stopper punctors 15, and the exhaust conduits 4 are communicated from the inner and outer end caps 14 to the exhaust ports 5. Make manufacturing and installation easier.

Example 3

Embodiment 3 of the self-stopping anti-bleeding precision filtration infusion device of the present invention, as shown in FIG. 1 and FIG. 2, an embodiment 3 is different from the first embodiment and the second embodiment in that the air diaphragm 12 can be disposed at the bottom end of the filter mount 8, and the air diaphragm 12 and the bottom end of the filter mount 8 can be ultrasonically welded. The air diaphragm acts to automatically stop the liquid supply. When the liquid in the drip bucket completely flows out, the tension of the liquid and the air and the role of the air diaphragm in the wet condition of the liquid cause a protective film on the surface of the air diaphragm to block the air. Ingress, to achieve the effect of automatic liquid stop and drip-proof, fundamentally avoiding blood return, and the air diaphragm can filter out impurities in the liquid.

An upper conduit 2 may be disposed between the stopper stopper 15 and the dripper 1, and the stopper puncturing device 15, the upper conduit 2, and the inlet conduit 3 are sequentially connected.

Example 4

The fourth embodiment of the self-stopping blood-removing precision filtration infusion set of the present invention differs from the first embodiment, the second embodiment and the third embodiment in that the lower port of the second infusion tube 10 can be provided with a hydrophilic membrane. 13. The hydrophilic membrane 13 can be ultrasonically welded to the lower port of the second infusion tube 10.

Alternatively, the hydrophilic membrane 13 may be ultrasonically welded to the lower port of the second infusion tube 10 corresponding to the filter mount 8.

Example 5

The fifth embodiment of the self-stopping blood-removing precision filtration infusion device of the present invention is different from the first embodiment, the second embodiment, the third embodiment, and the fourth embodiment. The lower port of the first infusion tube 7 can be provided with The hydrophilic membrane 13 and the hydrophilic membrane 13 can be ultrasonically welded to the lower port of the first infusion tube 7.

Alternatively, the hydrophilic membrane 13 may be ultrasonically welded to the lower port of the first infusion tube 7 corresponding to the filter mount 8.

Alternatively, the upper port of the first infusion tube 7 may be provided with a hydrophilic membrane 13 via ultrasonic welding.

Alternatively, the flow path wall surface of the first infusion tube 7 may be further provided with a hydrophilic membrane 13 by ultrasonic welding. Example 6 Embodiment 6 of the self-stopping anti-return blood precision infusion infusion device of the present invention, as shown in FIG. 4, the difference between Embodiment 6 and Embodiment 1, Embodiment 2, Embodiment 3, Embodiment 4, and Embodiment 5 is: The air diaphragm 12 may be disposed at the bottom of the dripper 1 below the bottom end of the filter mount 8, and the air diaphragm 12 is ultrasonically welded to the bottom inner wall of the dripper 1.

The air diaphragm can be placed at the bottom of the filter mount of the precision filter or at the bottom of the drip bucket below the bottom end of the filter mount and joined by ultrasonic welding. When the air diaphragm is wet, it can block the air from entering the lower duct, thus preventing the air from entering the human body. When the liquid medicine is finished, it can be automatically stopped to achieve the purpose of self-stopping. The air diaphragm also has the function of precise filtration, and the continuous liquid supply hole is provided as a slow liquid supply, and the continuous liquid supply can reach more than 30 minutes instead of stopping the liquid supply immediately, thereby realizing the anti-return blood. Features.

The working principle of the invention:

First insert the stopper puncture directly into the socket of the infusion bag or the infusion bottle, place the flow regulator in the closed position, then puncture the vein of the patient with the intravenous infusion needle, and then adjust the flow regulator to the required infusion rate. The liquid of the infusion bag or the infusion bottle is input into the dripper, and then enters the infusion needle through the dropper through the lower catheter, and then is input to the venous blood vessel of the patient through the intravenous infusion needle.

The infusion device is selected to automatically adjust the infusion flow rate and flow rate based on the amount of liquid in the drip chamber. When there is liquid in the infusion bag or the infusion bottle, there will be liquid replenishment in the dripper. Therefore, the liquid level in the dripper will be at a higher position, and the infusion device will be infused at the required normal infusion rate. The liquid is output at a large flow rate. When the liquid in the infusion bag or the infusion bottle is finished, the liquid remaining in the drip bucket will gradually decrease with the discharge of the liquid, and the liquid level in the drip bucket will gradually decrease. When the height is lowered to a certain height, the infusion device is selected. It will enter the slow infusion by normal infusion, slow infusion, ie, the liquid will be output at a small flow rate. When the liquid medicine in the drip bucket is slowly output for a period of time, the infusion device is selected to stop the liquid medicine output. From the beginning of the slow infusion to the stop of the drug output, it will last approximately 30 minutes. At the same time, due to the tension of liquid and gas and the role of the air diaphragm, it effectively blocks Air is trapped into the downcomer and only the liquid can pass through and into the downcomer. Therefore, the medical staff can easily handle the blood return caused by the infusion set in the prior art. Moreover, even if the infusion is slowly stopped to stop the discharge of the drug solution, the air can be effectively prevented from entering the downcomer, so that the occurrence of the blood return phenomenon can be fundamentally solved.

It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the scope of the present invention. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art The technical solutions of the present invention are modified or equivalently substituted without departing from the spirit and scope of the technical solutions of the present invention.

Claims

claims

1. A self-stopping anti-blood return precision filtration infusion set, including a dripping funnel, a bottle stopper piercer, and a catheter, which is characterized by: a precision filter is provided at the lower part of the dripping funnel, and the precision filter is provided with an air membrane. The selective infusion device and the filter mounting seat are used to adjust the infusion flow rate, and the air membrane is provided at the bottom end of the filter mounting seat or at the bottom of the dripper below the bottom end of the filter mounting seat, and the selective infusion device Fixed to the filter mounting seat, the filter mounting seat is connected to the bottom of the dripping hopper and communicates with the output end of the dripping hopper, the selective infusion device is provided with a hydrophilic diaphragm, the selective infusion device It includes a first infusion pipe, a second infusion pipe and a continuous liquid supply hole. The heights of the liquid inlet end surfaces of the second infusion pipe, the first infusion pipe and the continuous liquid supply hole decrease in sequence, and the first The infusion tube, the second infusion tube and the continuous liquid supply hole are respectively arranged on the filter mounting seat, and the first infusion tube, the second infusion tube and the continuous liquid supply hole are respectively connected with the The output end of the dripping funnel is connected, and the liquid inlet surface of the continuous liquid supply hole is located at the bottom of the filter mounting seat.

2. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the hydrophilic diaphragm is disposed at the lower port of the continuous liquid supply hole, and the hydrophilic diaphragm is in contact with the filter The device mounting base is connected by ultrasonic welding.

3. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the hydrophilic diaphragm is provided on the upper port of the continuous liquid supply hole and is connected to the filter mounting seat through ultrasonic welding. , and/or the hydrophilic diaphragm is arranged on the wall surface of the flow channel of the continuous liquid supply hole and is connected to the filter mounting seat through ultrasonic welding.

4. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the second infusion tube is provided with an automatic exhaust groove, and the automatic exhaust groove is along the second infusion tube. The wall is opened radially and is connected with the pipeline of the second infusion pipe, and the bottom of the automatic exhaust tank is the liquid end.

5. The self-stopping anti-blood return precision filtration infusion set according to claim 4, characterized by: There are three automatic exhaust grooves, which are evenly distributed on the wall of the second infusion pipe. A top cover is provided corresponding to the upper end of the second infusion pipe. The top cover is connected with the second infusion pipe. The upper end is fixedly connected.

6. The self-stopping anti-blood return precision filtration infusion set according to claim 5, characterized in that: the lower port of the second infusion tube is provided with a hydrophilic diaphragm, and the hydrophilic diaphragm is in contact with the second infusion tube. The lower port of the tube or the filter mounting seat is connected by ultrasonic welding.

7. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the lower port of the first infusion tube is provided with a hydrophilic diaphragm, and the hydrophilic diaphragm is in contact with the first infusion tube. The lower port of the tube or the filter mounting seat is connected by ultrasonic welding, or the upper port of the first infusion tube is connected by ultrasonic welding and is provided with a hydrophilic diaphragm, or the wall surface of the flow channel of the first infusion tube is connected by ultrasonic welding. There is a hydrophilic diaphragm.

8. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the air diaphragm is provided at the bottom end of the filter mounting seat, and the air diaphragm and the filter mounting seat The bottom ends are connected by ultrasonic welding.

9. The self-stopping anti-blood return precision filtration infusion set according to claim 1, characterized in that: the dripping hopper is provided with a liquid inlet pipe and an exhaust pipe, and the liquid inlet pipe passes through the dripper from the inside to the outside. The top of the bucket is connected to the bottle stopper piercer, the exhaust pipe passes out from the inside to the outside, and the top of the drip bucket is connected to the exhaust port. The height of the liquid outlet port of the liquid inlet pipe is higher than that of the exhaust pipe. the height of the air inlet port.

10. The self-stopping anti-blood return precision filtration infusion set according to claim 9, characterized in that: the top of the dripping hopper is provided with an end cap, the end cap is sealingly connected to the top of the dripping hopper, and the liquid inlet The pipe penetrates the end cap from the inside out to communicate with the bottle stopper piercer, and the exhaust pipe penetrates the end cap from the inside out to communicate with the exhaust port.