CN204337406U - A kind of anti-reverse streaming no-needle transfusion joint - Google Patents

Abstract

The utility model discloses an anti-backflow type needleless infusion joint, which comprises an infusion base, a shell and a silica gel valve. There is an anti-backflow blocking member that keeps the liquid passage normally closed or opens the liquid passage under pressure, and the anti-backflow blocking member is provided with a liquid passage that communicates with the liquid passage. The utility model adds an anti-backflow valve core and an anti-backflow blocking member that cooperate with each other on the traditional infusion joint. During the infusion, the anti-backflow blocking member is pressed to open the liquid passage. The liquid passage is closed to prevent reverse flow.

Description

Anti-reflux type needle-free infusion connector

technical field

The utility model relates to a safe medical needle-free transfusion connector, in particular to an anti-backflow type needle-free transfusion connector.

Background technique

At present, in medical clinics, blood transfusion, infusion or drug injection through venipuncture is the most common method in the process of treating patients. In the traditional infusion nursing process, it is necessary to use a heparin cap to seal the port of the infusion line. During the infusion, it is necessary to puncture the rubber pad in the heparin cap with a needle connected to the infusion set, so as to connect the line inserted into the body and carry out the infusion smoothly. In the field of medical emergency, it is often encountered that a large amount of rapid infusion is required. When infusing chemotherapy drugs with high viscosity liquid, it is necessary to increase the pressure and speed of the infusion, and ordinary infusion connectors cannot meet the requirements. Require.

For example, a needle-free infusion joint provided by the patent document with the application number of 201320379673.3, including an infusion base, a shell and a silicone valve, the infusion base is an annular hollow structure, and the bottom is provided with a catheter connector for connecting with an infusion catheter; The silicone valve is sleeved on the inner surface of the housing, and is fixed on the top of the infusion base by the housing; the axial center of the silicone valve is provided with a self-closing infusion channel in a normally closed state, and the Luer connector of the infusion set The self-sealing infusion channel can be inserted to form an infusion system isolated from the outside world.

The disadvantages of the traditional infusion method are: 1. Since the infusion process requires the use of needles, there is a risk of accidentally stabbing medical staff, especially for patients with infectious diseases, which will greatly increase the risk of medical staff being infected; 2. Rubber pads are generally used Made of natural rubber, it may be allergic to individual patients. At the same time, debris is likely to fall into the infusion channel during needle puncture, causing infection of patients; The veins connected to the human body will accumulate the residual pressure that has not been transported and dispersed, and the residual pressure will cause the liquid and blood to flow back into the infusion pipeline, resulting in medical accidents such as blood return and tube blockage, resulting in corresponding indwelling catheters and indwelling tubes. The medical malpractice in which the needle needs to be pulled out in advance will cause multiple injuries to the patient and increase unnecessary duplication of work for the medical staff.

Utility model content

The technical problem to be solved by the utility model is to provide an anti-backflow type needle-free infusion joint, which can complete the connection between the infusion set and the pipeline in the human body without using a needle, and reduce the risk of medical staff being infected due to misoperation. Risk, reduce the chance of patients being infected or causing allergies during the infusion process, and in the field of rapid infusion, prevent medical accidents such as backflow of liquid medicine and blood blockage due to excessive infusion, and the structure is simple, safe and reliable.

The concrete technical scheme that the utility model adopts is as follows:

An anti-backflow type needle-free infusion joint, including an infusion base, a shell and a silicone valve, the infusion base is provided with an anti-backflow valve core with a liquid passage, and the lower part of the anti-backflow valve core is provided with a liquid passage The anti-backflow blocking member that is normally closed or opened under pressure to open the liquid passage is provided with a liquid passage hole that communicates with the liquid passage.

The utility model adds an anti-backflow valve core and an anti-backflow blocking member that cooperate with each other on the traditional infusion joint. During the infusion, the anti-backflow blocking member is pressed to open the liquid passage. The liquid passage is closed to prevent reverse flow.

As an improvement, the infusion base is an annular hollow structure, and the bottom is provided with a conduit connector for connecting with an infusion conduit, and the shell is sleeved on the infusion base to form a communicating infusion channel in the infusion base and the shell.

As an improvement, the top of the silicone valve is provided with a self-sealing cutout, and the Luer connector of the infusion set is inserted into the cutout to open the silicone valve to communicate with the infusion channel, and the wall of the cutout is pressed against the outer wall of the Luer connector to maintain seal.

The self-sealing incision can remain sealed after repeated insertion and extraction of the Luer connector, preventing bacteria from entering the patient's infusion line and ensuring the safety of the patient's infusion.

As an improvement, the anti-reflux valve core is pressed and fixed by the silicone valve and the infusion base, and the middle part of the top surface of the anti-reflux valve core is provided with an accommodation groove, and the liquid passage is eccentrically connected to the bottom of the accommodation groove, and the passage The liquid channel is an annular channel.

The diameter of the accommodation groove is larger than the diameter of the channel in the silicone valve, which has the function of buffering and partial pressure infusion, so that the infusion can apply pressure evenly to the anti-reflux blocking member through the annular channel, so as to facilitate the opening of the liquid passage.

As an improvement, the anti-backflow blocking member has a support cylinder, and there is an elastic ring deformed under pressure in the support cylinder. The middle part of the elastic ring is the liquid passage hole, and the top surface of the elastic ring has a The sealing part of the liquid channel; meanwhile, the sealing part is an annular protrusion, and the outer part of the annular protrusion is provided with a sealing ring for keeping the anti-backflow valve core and the anti-backflow blocking part in close contact.

In the utility model, the anti-backflow blocking member is made of silica gel, which has the characteristics of low compression deformation and high elasticity, and realizes rapid opening of the infusion channel and reset closure after pressure relief. The annular protrusion corresponds to the position of the liquid passage. After being pressurized, the liquid passage is opened and flows along the surface of the annular protrusion to the liquid passage hole. The sealing ring can maintain the seal between the anti-backflow valve core and the anti-backflow blocking member. Prevent the infusion from staying in the space between the two.

As an improvement, the middle part of the anti-backflow spool protrudes downwards to have a sealing platform that closes the liquid passage hole.

When the infusion pressure is cancelled, the sealing platform is against the edge of the liquid passage hole, which has the effect of sealing the liquid passage hole, and further prevents the backflow of the liquid medicine and blood.

The anti-backflow type needle-free infusion joint of the utility model is connected with the Luer joint of the infusion set through a silicone valve, without using the existing needle structure, which can reduce the risk of medical personnel being infected due to misuse; The infusion function prevents the occurrence of liquid backflow and blood blockage after infusion, and reduces the burden on medical staff; especially in the field of pressure infusion, after high-pressure rapid infusion, there must be residual pressure in the infusion tube and connected veins. The anti-reflux needleless infusion joint can just solve this reflux effect, eliminating the phenomenon of backflow of liquid medicine and blood during high-pressure infusion; at the same time, there is no possibility of rubber pad debris falling, preventing debris from falling into the infusion channel, and cause infection in patients.

Description of drawings

Fig. 1 is a structural diagram of an anti-reflux type needle-free infusion connector;

Fig. 2 is a structural diagram of an anti-backflow blocking member;

Fig. 3 is an infusion state diagram of the anti-reflux type needle-free infusion connector;

Fig. 4 is a schematic diagram of anti-reflux of the anti-reflux needle-free infusion connector.

Detailed ways

As shown in FIG. 1 , an anti-reflux needleless infusion connector includes an infusion base 1 , a casing 2 , a silicone valve 3 , an anti-reflux valve core 4 and an anti-reflux blocking member 5 . The infusion base 1 is a ring-shaped hollow structure, and the bottom is provided with a catheter connector for connecting with the infusion catheter. The shell 2 is set on the infusion base 1 to form a connected infusion channel in the infusion base 1 and the shell 2. Silicone 3, anti-backflow The valve core 4 and the anti-reflux blocking member 5 are arranged in the casing 2 and the infusion base 1 .

The top of the silicone valve 3 is provided with a self-closing cutout 6. After the Luer connector of the infusion set is inserted into the cutout 6, the silicone valve 3 is opened to communicate with the infusion channel. The wall of the cutout 6 is pressed against the outer wall of the Luer connector to keep it sealed to prevent bacteria from entering the patient’s infusion tube. Road, to ensure the safety of patients infusion.

The anti-reflux valve core 4 is made of hard plastic, and is fixed by the pressure of the silicone valve 3 and the infusion base 1. The middle part of the top surface is provided with a receiving groove 7, and the bottom of the receiving groove 7 communicates with the annular liquid passage 8.

As shown in Figure 2, the anti-backflow blocking member 5 is made of silica gel and is located at the lower part of the anti-backflow valve core 4. It includes a support cylinder 51, and the top of the support cylinder 51 is turned inward to form an elastic ring 52 deformed under pressure. The middle part of the ring 52 is a liquid hole 53 . The top surface of the elastic ring 52 is provided with an annular protrusion 54 that opens or closes the liquid passage, and the annular protrusion 54 is provided with a sealing ring 55 that keeps the anti-reflux valve core 4 and the anti-reflux plugging member 5 tightly fitted to prevent the infusion from staying in the gap between the two.

In addition, the middle part of the anti-backflow spool 4 protrudes downwards with a sealing platform (not shown in the figure) that closes the liquid passage hole 53. When the infusion pressure is canceled, the sealing platform is against the edge of the liquid passage hole 53, and has the function of sealing the liquid passage hole 53. The effect of hole 53 further prevents the backflow of medicinal liquid and blood.

In this embodiment, when the Luer connector of the infusion set is inserted into the self-sealing incision 6, an infusion system isolated from the outside world is formed; when infusion is performed, the pressure of the infusion can open the anti-reflux blocking member 5 and the anti-reflux valve core 4. The infusion channel, as shown in Figure 3; when the infusion pressure is canceled, the anti-reflux blocking member 5 and the anti-reflux valve core 4 will be closed to prevent reverse flow, as shown in Figure 4.

The above descriptions are only examples of the preferred implementation of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present utility model shall be included in the present utility model. within the scope of the new protection.

Claims (9)

1. an anti-reverse streaming no-needle transfusion joint, comprise transfusion base, shell and silica gel valve, it is characterized in that, described transfusion base be provided with the counterflow-preventing spool of liquid passage, the bottom of described counterflow-preventing spool is provided with the counterflow-preventing closeouts keeping the normally closed or opened liquid passage of pressurized of liquid passage, and described counterflow-preventing closeouts is provided with and crosses the liquid pass hole of liquid channel connection.

2. anti-reverse streaming no-needle transfusion joint as claimed in claim 1, it is characterized in that, described transfusion base is annular hollow structure, bottom is provided with the catheter connecting joint for being connected with transfusion catheter, described casing is located on transfusion base, in transfusion base with shell, form the infusion channel be communicated with.

3. anti-reverse streaming no-needle transfusion joint as claimed in claim 2, it is characterized in that, described silica gel valve top is provided with self-enclosed otch, open the infusion channel described in silica gel valve connection after the otch described in female Luer insertion of transfusion device, the wall of described otch compresses the outer wall maintenance sealing of female Luer.

4. anti-reverse streaming no-needle transfusion joint as claimed in claim 1, it is characterized in that, described counterflow-preventing spool relies on silica gel valve and the compressing of transfusion base to fix, and is provided with holding tank, crosses the bottom that liquid passage bias is communicated with described holding tank in the middle part of the end face of described counterflow-preventing spool.

5. anti-reverse streaming no-needle transfusion joint as claimed in claim 4, is characterized in that, described liquid passage is excessively circular passage.

6. anti-reverse streaming no-needle transfusion joint as claimed in claim 1, it is characterized in that, described counterflow-preventing closeouts has support cylindrical shell, support the elastic ring in cylindrical shell with compressive deformation, the middle part of elastic ring is described liquid pass hole, and elastic ring end face has the sealing member opening or closing described liquid passage excessively.

7. anti-reverse streaming no-needle transfusion joint as claimed in claim 6, it is characterized in that, described sealing member is annular protrusion.

8. anti-reverse streaming no-needle transfusion joint as claimed in claim 7, is characterized in that, is provided with the sealing ring keeping counterflow-preventing spool and counterflow-preventing closeouts to fit tightly outside described annular protrusion.

9. anti-reverse streaming no-needle transfusion joint as claimed in claim 1, is characterized in that, be protruding with the sealing station of closed liquid pass hole in the middle part of described counterflow-preventing spool downwards.