CN207768824U - A kind of anti-blood back infusion connector being vented - Google Patents

Abstract

The utility model provides a kind of anti-blood back infusion connector being vented, by the way that exhaust outlet directly is arranged on its lid, and the water preventing ability air-filtering membrane of exhaust outlet can be completely covered in setting on lid inner wall, once being mixed with air in infusion pipeline in this way, bubble will be escaped from the exhaust outlet of infusion connector automatically, the case where to effectively air be avoided to enter human body, occurs, compared with water preventing ability air-filtering membrane and exhaust outlet are set to the infusion connector in motion stops in the prior art, the infusion connector of the utility model is more convenient for assembling, be conducive to improve its production efficiency, and water preventing ability air-filtering membrane and the heat sealer of lid inner wall are good, never there is the phenomenon of leakage.And elastic barrier flaps are set between the inlet of liquid outlet and pedestal that the infusion connector of the utility model also covers on it, liquid outlet is obstructed with the rebound using elastic barrier flaps under being more than infusion pressure situation in blood pressure, plays the role of preventing blood backflow.

Description

A kind of anti-bleeding infusion joint that can be exhausted

technical field

The utility model belongs to the field of medical equipment, relates to a disposable medical equipment, in particular to an infusion joint with functions of exhausting and preventing blood return.

Background technique

At present, the infusion sets used by domestic medical institutions for intravenous infusion are usually disposable infusion sets, which are medical consumables that have undergone aseptic treatment to establish a channel between the vein and the liquid medicine. Existing common infusion sets are generally made of needles (such as disposable intravenous infusion needles, intravenous indwelling needles, etc.), protective caps, infusion hoses, liquid medicine filters, flow rate regulators, Murphy's dropper, bottle stopper puncture It is mainly used for clinical gravity infusion, which plays a positive role in preventing cross-infection during infusion.

In clinical use, medical personnel insert the bottle stopper piercer of the infusion set into the infusion bottle, hang the infusion bottle on the infusion rod, exhaust the air and fill the entire infusion hose with liquid medicine, and then close the flow rate regulator to perform venipuncture After the needle puncture is fixed, the flow rate regulator can be opened, and the drip rate can be adjusted for infusion. Under the action of atmospheric pressure, the liquid medicine flows into the Murphy dropper along the infusion hose. When the pressure is greater than the venous pressure, the liquid in the infusion bottle flows into the vein along the infusion hose. However, during the infusion process or when there is a small amount of liquid medicine left in the infusion hose or when the liquid medicine is infused or stopped automatically, since the water column pressure at this time is lower than the venous pressure, if the flow rate regulator is not closed in time or the needle is pulled out , it will cause the patient's venous blood to flow back into the infusion tube, resulting in unexpected blood return. Once the blood returns, it will frighten the patient at least, causing the patient's worry and uneasiness, and at the worst, it will cause the infusion hose to be unable to continue the infusion due to bubble embolism. In clinical practice, the infusion needle holder and the infusion set have fallen off, causing the patient's blood outflow, endangering the life of the patient. Therefore, how to effectively solve this problem and its adverse consequences during clinical treatment has always been a thorny issue in the industry.

For this reason, many studies are dedicated to the development of infusion sets with anti-blood return function. For example, Chinese patent document CN104888310A discloses a kind of anti-blood return infusion connector, which includes an outer joint and an inner joint seat that are tightly connected and an elastic joint that is arranged between the two. The barrier sheet, the elastic barrier sheet has a sealing part and a liquid opening, the sealing part covers the liquid outlet of the inner connection seat to restrict the flow of liquid, a movable plug is embedded on the side wall of the inner connection seat, and a water-blocking air filter is set in the movable plug Membrane, the outer wall of the movable plug has a vent. The above-mentioned technology can realize the one-way circulation of the liquid medicine by setting the elastic barrier sheet to utilize its own elastic deformation, effectively prevent the backflow of blood, and also set the exhaust port to make it have the function of exhausting, but the technology in this technology The exhaust port is set on the movable plug, so it is necessary to assemble the movable plug with the inner socket, which will inevitably cause inconvenient assembly of the infusion joint and affect its production efficiency, not to mention the hidden danger of liquid leakage in the embedded movable plug. And then bring negative influence to the use effect of infusion connector.

Utility model content

The utility model solves the disadvantages of inconvenient assembly and hidden danger of liquid leakage in the existing ventable infusion joint, and further provides an infusion joint that is easy to assemble and does not leak, and has the functions of exhausting and preventing blood return.

The technical scheme that the utility model realizes above-mentioned purpose is:

A ventable anti-blood infusion infusion joint, comprising a sealed upper cover and a base, the liquid outlet of the upper cover communicates with the liquid inlet of the base;

The upper cover includes a cover body and a positioning member arranged in the cover body, the cover body covers the top of the base and covers the upper part of the base, and at least one An air outlet, the inner wall of the cover is provided with a water-blocking air filter film, and the water-blocking air filter film completely covers the air outlet;

One end of the positioning piece is connected to the inner wall of the upper cover, and the other end of the positioning piece forms a liquid outlet of the upper cover;

An elastic barrier is arranged between the liquid outlet of the upper cover and the liquid inlet of the base, the periphery of the elastic barrier is fixedly connected with the inner wall of the liquid inlet of the base, and the elastic barrier includes A sealing part and a liquid outlet, the sealing part completely covers the liquid outlet of the upper cover.

The cover body is arc-shaped or U-shaped.

The exhaust port is arranged at the bottom of the U-shaped cover.

The upper cover also includes a liquid inlet pipe connected to the cover body.

The end of the liquid inlet pipe extends into the U-shaped cover body, and the water-blocking air filter membrane is clamped between the end wall surface of the liquid inlet pipe and the inner wall surface at the corner of the U-shaped cover body.

The positioning member is a pipe body whose caliber is tapered along the liquid medicine flowing direction, and the liquid inlet end of the pipe body is connected with the end of the liquid inlet pipe.

The positioning member is an annular boss, the lower wall of the annular boss is an arc surface, and the opening of the arc surface is set downward.

The projection of the liquid outlet of the upper cover on the elastic barrier sheet is located in the sealing part, so that the sealing part is not smaller than the liquid outlet of the upper cover.

The sealing part is arranged in the middle of the elastic barrier sheet, and the liquid opening is arranged around the sealing part.

A hollow circular platform is also arranged around the periphery of the elastic barrier sheet, and the outer peripheral wall of the circular platform is in close contact with the inner wall of the base, so that the sealing part of the elastic barrier sheet protrudes upwards to block the upper cover of the liquid outlet.

In the anti-blood infusion transfusion joint that can be exhausted according to the utility model, the liquid medicine flows through the liquid inlet pipe, the positioning piece, the elastic barrier piece and the base in sequence.

Compared with the prior art, the exhaustable anti-return blood transfusion joint described in the utility model has the following advantages:

1. The anti-blood infusion joint that can be exhausted according to the utility model is provided with an air outlet directly on the cover body of the upper cover, and a water-blocking air filter membrane that can completely cover the air outlet is provided on the inner wall of the cover , so that once the infusion line is mixed with air, the air bubbles will automatically escape from the exhaust port of the infusion joint, thereby effectively preventing the air from entering the human body, and also greatly simplifying the exhaust operation during the infusion process. Compared with the infusion joint in the prior art where the water-blocking air filter membrane and the exhaust port are arranged on the movable plug, the infusion joint of the utility model is easier to assemble, which is conducive to improving its production efficiency, and the water-blocking air filter membrane is compatible with The heat seal of the inner wall of the cover is good, and there will be no leakage at all.

And the infusion connector of the present utility model is provided with a positioning piece in its cover body, and an elastic barrier sheet including a sealing part and a liquid opening is provided between the liquid outlet of the upper cover and the liquid inlet of the base, so as to rely on the elastic barrier sheet The self-elastic deformation realizes the one-way circulation of the liquid medicine, so that the infusion connector of the present invention can still prevent the blood from flowing back even when the hydraulic pressure is equal to the venous pressure of the human body or the pressure difference between the two is small. During the process, even if you walk around or raise your arms at will, there will be no blood return phenomenon, which is more convenient for clinical use.

2. The exhaustable anti-blood infusion infusion joint described in the utility model can increase the flow velocity of the liquid medicine when it reaches the elastic barrier plate by setting its positioning part as a pipe body whose caliber is tapered along the flow direction of the liquid medicine. Therefore, the elastic barrier sheet is more forcefully forced to deform along the flow direction of the liquid medicine and away from the liquid outlet of the upper cover, so that the liquid medicine can flow to the human body from the liquid opening provided on the elastic barrier sheet to realize the circulation of the liquid medicine.

At the same time, the infusion joint of the utility model also connects the liquid inlet end of the pipe body with the end of the liquid inlet pipe, so that a liquid return space is formed between the outer wall of the pipe body and the inner wall of the upper cover, and the liquid return space corresponds to the elastic barrier. The liquid opening of the sheet is set in such a way that the elastic barrier sheet only contacts the wall of the liquid outlet of the upper cover, which is conducive to maintaining the surface flatness of the elastic barrier sheet, thereby ensuring that the sealing part of the elastic barrier sheet can be tightly closed when a small amount of blood flows back. It fits closely with the wall of the liquid outlet of the upper cover to better achieve the anti-bleed effect. Based on the same reason as above, the positioning part of the infusion connector of the present invention can also be set as an annular boss whose lower wall is an arc surface, and the opening of the arc surface faces downward to form a liquid return space with the same function as above.

3. In the anti-blood infusion joint that can be exhausted according to the utility model, a hollow round platform is arranged on the periphery of the elastic barrier piece, and the outer peripheral wall surface of the round platform is closely attached to the inner wall surface of the base, so that the elastic barrier piece and the inner wall surface of the base can be closely fitted. The fit of the liquid outlet of the upper cover is tighter, and at the same time, the elastic barrier can be more firmly fixed between the liquid inlet of the base and the liquid outlet of the upper cover, which is beneficial to enhance the anti-bleeding effect of the elastic barrier.

4. The exhaustable infusion joint described in the utility model can be a standard 6:100 conical joint or a 6:100 screw joint for the upper cover and the base, so that the upper cover can be connected with the liquid medicine filter, It can also be connected with a two-way with a tapered head; the base can directly replace the infusion needle seat, and be bonded to the thin tube of the infusion needle, or it can be connected to the thin tube of the infusion needle or assembled on the three-way tube of the intravenous indwelling needle. On the through seat, so that the infusion joint of the utility model has universality, can be connected and used between the infusion set and the infusion needle, and can also be directly assembled in such as precision filter infusion set, bag type infusion set, burette type infusion set, Used on various functional infusion sets such as self-stop infusion sets, automatic exhaust infusion sets, pump infusion sets, dialysis tubing, and central venous catheters.

Description of drawings

In order to more clearly illustrate the technical solutions in the specific embodiments of the present invention, the accompanying drawings that need to be used in the description of the specific embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are some of the embodiments of the present invention. Embodiments, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative work.

Fig. 1 is the structural diagram of the anti-blood back transfusion connector that can be vented described in embodiment 1;

Fig. 2 is a top view of an embodiment of the elastic barrier sheet in Example 1;

3 is a top view of another embodiment of the elastic barrier sheet in Example 1;

Fig. 4 is the structural diagram of the anti-blood infusion infusion joint that can be exhausted described in embodiment 2;

Among them, the reference signs are as follows:

10-top cover; 11-cover body; 12-positioning piece; 13-exhaust port; 14-water-blocking air filter membrane; 15-inlet pipe; 20-base; 30-elastic barrier piece; 31-closed part; 32-fluid port; 33-round platform.

Detailed ways

The technical solutions of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are part of the embodiments of the utility model, but not all of them. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, it should be noted that the orientations or positional relationships indicated by the terms "upper", "lower", "inner", "outer" and the like are based on the orientation or positional relationships shown in the accompanying drawings, and are only In order to facilitate the description of the present invention and simplify the description, it does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention. In addition, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be fixed connection, detachable connection, or integral connection; it can be mechanical connection or electrical connection; it can be direct connection, It can also be indirectly connected through an intermediary, and it can be the internal communication of two elements. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present utility model in specific situations.

Example 1

As shown in FIG. 1 , the degassable anti-return blood infusion joint described in this embodiment includes an upper cover 10 and a base 20 that are sealed and connected, and the liquid outlet of the upper cover 10 communicates with the liquid inlet of the base 20 settings; where:

The upper cover 10 is a 6:100 screw joint, which further includes a cover 11, a liquid inlet pipe 15 connected to the cover 11 and a positioning member 12 arranged in the cover 11, the cover 11 Cover the top of the base 20 and cover the upper part of the base 20. In this embodiment, the cover 11 is U-shaped, and the end of the inlet pipe 15 extends to the U-shaped cover. 11, of course in other embodiments can also be arc; at the bottom of the U-shaped cover 11 and through its inner and outer walls to set at least one exhaust port 13, at the end wall of the inlet pipe 15 and the A water-blocking air filter film 14 that can completely cover the exhaust port 13 is also provided between the inner walls of the U-shaped cover 11. This embodiment is provided with two exhaust ports. Other embodiments can also be based on Need to set one or more exhaust ports;

One end of the positioning member 12 is connected to the inner wall of the upper cover 10, and the other end of the positioning member 12 forms the liquid outlet of the upper cover 10. In this embodiment, the positioning member 12 is an annular boss , the lower wall surface of the annular boss is an arc surface, and the opening of the arc surface is set downward; an elastic barrier sheet 30 is set between the liquid outlet of the upper cover 10 and the liquid inlet of the base 20, The periphery of the elastic barrier sheet 30 is fixedly connected to the inner wall of the liquid inlet of the base 20. The elastic barrier sheet 30 includes a sealing part 31, a liquid opening 32 and a hollow round platform 33. The liquid outlet of the upper cover 10 The projection of the mouth on the elastic barrier sheet 30 is located in the sealing part 31, so that the sealing part 31 can completely cover the liquid outlet of the upper cover 10. In this embodiment, please refer to Fig. 2 and Fig. 3. The closing part 31 is arranged in the middle of the elastic barrier sheet 30, and the liquid opening 32 is arranged around the closing part 31. The shape of the liquid opening 32 can be hole-like or linear; The circular platform 33 is arranged around the periphery of the elastic barrier sheet 30, and the outer peripheral wall of the circular platform 33 is in close contact with the inner wall of the base 20, so that the sealing part 31 of the elastic barrier sheet 30 protrudes upwards to block The liquid outlet of the upper cover 10, the base 20 in this embodiment is a 6:100 screw joint.

Example 2

As a modified implementation, the structure of the ventable anti-blood return infusion connector described in this embodiment is generally similar to the above-mentioned embodiment 1, but the difference is that as shown in Figure 4, the base of this embodiment is 6 : 100 conical joints, and the positioning part is a pipe body whose diameter is tapered along the liquid medicine flow direction, and the liquid inlet end of the pipe body is connected with the end of the liquid inlet pipe.

Example 3

The structure of the degassable blood return preventing transfusion connector described in this embodiment is the same as that of Embodiment 1, but as another optional implementation, both the upper cover 10 and the base 20 in this embodiment are directly connected to the catheter.

Apparently, the above-mentioned embodiments are only examples for clear description, rather than limiting the implementation. For those of ordinary skill in the art, other changes or changes in different forms can be made on the basis of the above description. It is not necessary and impossible to exhaustively list all the implementation manners here. And the obvious changes or changes derived therefrom are still within the scope of protection of the utility model.

Claims (10)

1. A ventable anti-blood infusion infusion connector, comprising a sealingly connected upper cover (10) and a base (20), the liquid outlet of the upper cover (10) and the liquid inlet of the base (20) Connectivity setting; characterized in that: The upper cover (10) includes a cover (11) and a positioning piece (12) arranged in the cover (11), the cover (11) covers the top of the base (20) and Covering the upper part of the base (20), at least one air outlet (13) is provided through the inner and outer walls of the cover (11), and a water-blocking air filter film (14) is arranged on the inner wall of the cover (11). ), and the water-blocking air filter film (14) completely covers the exhaust port (13); One end of the positioning member (12) is connected to the inner wall of the upper cover (10), and the other end of the positioning member (12) forms a liquid outlet of the upper cover (10); An elastic barrier sheet (30) is arranged between the liquid outlet of the upper cover (10) and the liquid inlet of the base (20), and the periphery of the elastic barrier sheet (30) and the base (20) The inner wall of the liquid inlet is fixedly connected, the elastic barrier sheet (30) includes a sealing part (31) and a liquid opening (32), and the sealing part (31) completely covers the liquid outlet of the upper cover (10) . 2. The ventable anti-backflow transfusion connector according to claim 1, characterized in that the cover (11) is arc-shaped or U-shaped. 3. The ventable blood return preventing infusion connector according to claim 2, characterized in that, the vent (13) is arranged at the bottom of the U-shaped cover (11). 4. The ventable anti-return blood transfusion connector according to claim 2, characterized in that, the upper cover (10) also includes a liquid inlet pipe (15), and the liquid inlet pipe (15) is connected with the cover body (11) connection settings. 5. The ventable anti-blood infusion infusion connector according to claim 4, characterized in that, the end of the liquid inlet pipe (15) extends into the U-shaped cover (11), and the water-blocking air The filter membrane (14) is clamped between the end wall surface of the liquid inlet pipe (15) and the inner wall surface at the corner of the U-shaped cover (11). 6. The ventable anti-blood return infusion connector according to claim 4, characterized in that, the positioning member (12) is a tube body whose caliber tapers along the flow direction of the liquid medicine, and the liquid inlet end of the tube body It is connected with the end of the liquid inlet pipe (15). 7. The ventable anti-blood return transfusion connector according to claim 1, characterized in that, the positioning member (12) is an annular boss, the lower wall of the annular boss is an arc surface, and the arc The opening of the face is set downward. 8. The ventable anti-blood back infusion connector according to claim 1, characterized in that the projection of the liquid outlet of the upper cover (10) on the elastic barrier (30) is located at the sealing part (31), so that the sealing part (31) is not smaller than the liquid outlet of the upper cover (10). 9. The ventable anti-blood back infusion connector according to claim 8, characterized in that, the sealing part (31) is arranged in the middle of the elastic barrier (30), and the liquid opening (32) Arranged around said closure portion (31). 10. The ventable anti-blood infusion infusion connector according to any one of claims 1-9, characterized in that, a hollow circular platform (33) is also arranged around the periphery of the elastic barrier sheet (30), and the circular platform (33) is closely attached to the inner wall of the base (20), so that the sealing portion (31) of the elastic barrier piece (30) protrudes upwards to block the outlet of the upper cover (10). liquid mouth.