Remaining needle assembly

Abstract

The utility model discloses an indwelling needle assembly which comprises an indwelling needle body and an air cleaning and exhausting device, an injection insertion channel is arranged in the indwelling needle body in the length direction, a blocking block is clamped in the injection insertion channel, and the air cleaning and exhausting device is movably inserted into the tail end of the indwelling needle body and used for being connected with an injection needle and exhausting air in the injection insertion channel. The plugging block is a spherical structure body with elasticity inside, a needle hole is formed in the center of the plugging block, the plugging block is located in the middle of the injection insertion channel, and when the syringe needle is pulled out of the plugging block, the needle hole in the center of the plugging block is closed. According to the indwelling needle, when one-time injection is completed and the injection needle is drawn out, the plugging block can seal the injection insertion channel, so that isolation of the injection insertion channel is achieved, external air is prevented from entering blood of a patient through the indwelling needle body, and safety of the indwelling needle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of indwelling needles, and particularly relates to an indwelling needle assembly. Background Art

[0002] The use of indwelling needles can reduce the pain caused by repeated intravenous punctures in children and the fear of injections, relieve the anxiety of parents, facilitate clinical medication, rescue medication for critically ill patients, reduce the workload of nurses, and reduce the pain of children. Therefore, indwelling needles are widely used in clinics;

[0003] However, in existing indwelling needles, during actual application, when secondary injection is performed, there is a small amount of air in the main structure of the indwelling needle. Therefore, when the injection needle is inserted into the indwelling needle, the air inside the indwelling needle is easily squeezed into the patient's body, posing a certain safety hazard. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the defect that when secondary injection is performed in the actual application of the indwelling needle in the prior art, there is a small amount of air in the main structure of the indwelling needle. Therefore, when the injection needle is inserted into the indwelling needle, the air inside the indwelling needle is easily squeezed into the patient's body, posing a certain safety hazard. The utility model provides an indwelling needle assembly. When the injection needle is withdrawn after the first injection is completed, the blocking block can close the injection insertion channel, thereby realizing the isolation of the injection insertion channel, avoiding external air from entering the patient's blood through the indwelling needle body, increasing the safety of the indwelling needle, and the device is provided with an air exhaust and cleaning device at the end of the indwelling needle body, which can discharge the air in the area behind the blocking block in the injection insertion channel when the indwelling needle is used for secondary injection, thus avoiding the gas remaining in the injection insertion channel from entering the patient's blood and improving the safety of the indwelling needle.

[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] The utility model discloses a detaining needle assembly, which comprises a detaining needle body and an air purging device. An injection insertion channel is arranged inside the detaining needle body along the length direction. A plugging block is clamped inside the injection insertion channel. The air purging device is movably inserted at the end of the detaining needle body and is used for connecting an injection needle and discharging the air inside the injection insertion channel. The plugging block is a spherical structure with elasticity inside, and a needle hole is arranged at the center of the plugging block. The plugging block is located at the middle position of the injection insertion channel. When the syringe needle withdraws the plugging block, the needle hole at the center of the plugging block is closed. Such a structural arrangement enables that when the detaining needle body finishes an injection and the injection needle is withdrawn, the plugging block can close the injection insertion channel, thereby realizing the isolation of the injection insertion channel and avoiding the entry of external air into the patient's blood through the detaining needle body, increasing the safety of the detaining needle. And this device is provided with an air purging device at the end of the detaining needle body, which can discharge the air inside the injection insertion channel in the area behind the plugging block when the detaining needle is used for a second injection, thus avoiding the gas remaining in the injection insertion channel from entering the patient's blood and enhancing the safety of the detaining needle.

[0007] Preferably, the air purging device and the end of the detaining needle body are movably connected. The front end of the air purging device adopts a silica gel structure with a needle hole at the center and elasticity. The air purging device can gradually move into the detaining needle body by pushing. Such a structural arrangement enables that when the injection needle is inserted into the air purging device, the air purging device can be pushed to move the whole into the detaining needle body, and the gas inside the detaining needle body is extruded and discharged.

[0008] Preferably, the front end of the air purging device adopts an inwards concave hemispherical structure. Such a structural arrangement enables that when the air purging device contacts the plugging block, the fit degree with the plugging block is higher, so that the gas inside the injection insertion channel is discharged more thoroughly.

[0009] Preferably, an injection needle joint is installed at the end of the air purging device and is used for fixedly connecting the injection needle.

[0010] Preferably, a negative pressure container is further included, which is fixedly installed outside the detaining needle body. The negative pressure container is communicated with the injection insertion channel through an exhaust channel. A valve structure is arranged inside the exhaust channel. When the valve structure is opened and the air purging device extrudes the injection insertion channel, the gas inside the injection insertion channel can enter the negative pressure container along the exhaust channel, thereby realizing the discharge of the gas inside the injection insertion channel.

[0011] Preferably, fixing adhesive ears are symmetrically arranged on both sides of the detaining needle body, and the fixing adhesive ears are used for fixedly adhering the detaining needle body to the patient's skin.

[0012] Preferably, a catheter hose is installed at the front end of the indwelling needle body, and the catheter hose is used to remain in the injection position of the patient.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] When the injection is completed and the injection needle is withdrawn, the blocking block can close the injection insertion channel, so as to isolate the injection insertion channel, thus preventing external air from entering the patient's blood through the indwelling needle body, and increasing the safety of the indwelling needle.

[0015] The device is equipped with an air purging device at the end of the indwelling needle body, which can expel the air in the area behind the blocking block in the injection insertion channel during the second injection of the indwelling needle, thus preventing the gas remaining in the injection insertion channel from entering the patient's blood and improving the safety of the indwelling needle. Description of the Drawings

[0016] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 is a schematic diagram of the structure of the air purging device in the utility model.

[0018] Reference numerals: 1, catheter hose; 2, injection insertion channel; 3, negative pressure container; 4, blocking block; 5, exhaust channel; 6, injection needle connector; 7, fixed adhesive ear; 8, air purging device; 9, indwelling needle body. Detailed Embodiments

[0019] The following further describes the detailed embodiments of a indwelling needle assembly of the utility model in conjunction with the attached Figure 1 - attached Figure 2 , which overcomes the defect that in the prior art, when the indwelling needle is used for the second injection, there is a small amount of air in the main body structure of the indwelling needle. Therefore, when the injection needle is inserted into the indwelling needle, the air inside the indwelling needle is easily squeezed into the patient's body, posing a certain safety hazard. When the injection is completed and the injection needle is withdrawn, the blocking block can close the injection insertion channel, so as to isolate the injection insertion channel, thus preventing external air from entering the patient's blood through the indwelling needle body, and increasing the safety of the indwelling needle. Moreover, the device is equipped with an air purging device at the end of the indwelling needle body, which can expel the air in the area behind the blocking block in the injection insertion channel during the second injection of the indwelling needle, thus preventing the gas remaining in the injection insertion channel from entering the patient's blood and improving the safety of the indwelling needle. The indwelling needle assembly of the utility model is not limited to the description of the following embodiments.

[0020] Example 1:

[0021] This example provides a detaining needle assembly, as Figure 1-2 shown, including a detaining needle body 9 and an air purging device 8. Along the length direction inside the detaining needle body 9, there is an injection insertion channel 2. A blocking block 4 is clamped inside the injection insertion channel 2. The air purging device 8 is movably inserted at the end of the detaining needle body 9 for connecting an injection needle and discharging the air in the injection insertion channel 2. The blocking block 4 is a spherical structure with elasticity inside. There is a needle hole at the center of the blocking block 4. The blocking block 4 is located at the middle position of the injection insertion channel 2. When the syringe needle withdraws the blocking block 4, the needle hole at the center of the blocking block 4 is closed.

[0022] By adopting the above technical solution:

[0023] When the detaining needle body 9 finishes an injection and the injection needle is withdrawn, the blocking block 4 can close the injection insertion channel 2, thus realizing the isolation of the injection insertion channel 2, avoiding the entry of external air into the patient's blood through the detaining needle body 9, increasing the safety of the detaining needle. And this device is installed with an air purging device 8 at the end of the detaining needle body 9, which can discharge the air in the area behind the blocking block 4 in the injection insertion channel 2 during the second injection of the detaining needle, thus avoiding the gas remaining in the injection insertion channel 2 from entering the patient's blood and improving the safety of the detaining needle.

[0024] Example 2

[0025] Based on Example 1, in this example, the air purging device 8 and the end of the detaining needle body 9 are movably connected. The front end of the air purging device 8 adopts a silicone structure with a needle hole at the center and elasticity. The air purging device 8 can gradually move into the detaining needle body 9 by pushing.

[0026] Furthermore, the front end of the air purging device 8 adopts an inward concave hemispherical structure. Such a structural setting makes the air purging device 8 have a higher degree of fit with the blocking block 4 when it contacts the blocking block 4, so that the gas in the injection insertion channel 2 is discharged more thoroughly.

[0027] Furthermore, an injection needle connector 6 is installed at the end of the air purging device 8 for fixedly connecting the injection needle.

[0028] By adopting the above technical solution:

[0029] After the injection needle is inserted into the air purging device 8, the air purging device 8 can be pushed to make its whole move into the detaining needle body 9, and the gas inside the detaining needle body 9 is extruded and discharged.

[0030] Example 3

[0031] Based on Embodiment 2, in this embodiment, a negative pressure container 3 is further included, which is fixedly installed outside the indwelling needle body 9. The negative pressure container 3 is communicated with the injection insertion channel 2 through an exhaust channel 5, and a valve structure (not shown in the figure) is provided in the exhaust channel 5.

[0032] Furthermore, fixed adhesive ears 7 are symmetrically provided on both sides of the indwelling needle body 9, and the fixed adhesive ears 7 are used to fixedly bond the indwelling needle body 9 to the patient's skin.

[0033] Furthermore, an indwelling needle hose 1 is installed at the front end of the indwelling needle body 9, and the indwelling needle hose 1 is used to remain in the patient's injection position.

[0034] By adopting the above technical solutions:

[0035] When the valve structure is opened and the air purging device 8 squeezes the injection insertion channel 2, the gas inside the injection insertion channel 2 can enter the negative pressure container 3 along the exhaust channel 5, thereby realizing the discharge of the gas in the injection insertion channel 2.

[0036] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A indwelling needle assembly, characterized in that: Comprising: A detaining needle main body (9) which is provided with an injection insertion channel (2) along its length direction inside, and a plugging block (4) is clamped inside the injection insertion channel (2); An air purging device (8) which is movably inserted at the end of the detaining needle main body (9) and is used for connecting an injection needle and purging air in the injection insertion channel (2); Wherein, the plugging block (4) is a spherical structure with elasticity inside, a needle hole is provided at the center of the plugging block (4), the plugging block (4) is located at the middle position of the injection insertion channel (2), and when the syringe needle withdraws the plugging block (4), the needle hole at the center of the plugging block (4) is closed.

2. The indwelling needle assembly according to claim 1, wherein: The air purging device (8) is movably connected with the end of the detaining needle main body (9), the front end of the air purging device (8) is made of an elastic silica gel structure with a needle hole at the center, and the air purging device (8) can gradually move into the detaining needle main body (9) by pushing.

3. The indwelling needle assembly according to claim 2, wherein: The front end of the air purging device (8) is in a concave hemispherical structure.

4. The indwelling needle assembly according to claim 2, wherein: An injection needle joint (6) is installed at the end of the air purging device (8) and is used for fixedly connecting an injection needle.

5. The indwelling needle assembly according to claim 3, wherein: It further comprises a negative pressure container (3) which is fixedly installed outside the detaining needle main body (9), the negative pressure container (3) is communicated with the injection insertion channel (2) through an exhaust channel (5), and a valve structure is arranged in the exhaust channel (5).

6. The indwelling needle assembly according to claim 1, wherein: Fixing adhesive ears (7) are symmetrically arranged on both sides of the detaining needle main body (9), and the fixing adhesive ears (7) are used for fixedly adhering the detaining needle main body (9) to the skin of a patient.

7. The indwelling needle assembly according to claim 1, characterized in that: A detaining needle hose (1) is installed at the front end of the detaining needle main body (9), and the detaining needle hose (1) is used for remaining inside the injection position of a patient.

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