A slow-release sealing device

Abstract

This invention discloses a slow-release sealing device, comprising: an installation tube having an injection port and a reservoir cavity that communicate with each other; the installation tube being connected to a stopcock end to connect the injection port to an indwelling needle; a pressure valve disposed within the injection port; and a fluid-pushing assembly including a pusher component disposed in the reservoir cavity that performs piston-like movements, the pusher component having a protrusion and a puncture tip; wherein the puncture tip punctures the pressure valve to form a pressure cavity. The slow-release sealing device provided by this invention utilizes the pressure valve disposed within the injection port of the installation tube and the pusher component disposed within the reservoir cavity. The installation tube can be installed onto the stopcock end of the indwelling needle, at which point the injection port communicates with the indwelling needle. The reservoir cavity pre-stores sealing fluid, allowing the pusher component of the fluid-pushing assembly to slide along the reservoir cavity, causing the sealing fluid to gradually enter the indwelling needle from the injection port through the pressure valve, thereby achieving a sealing effect on the indwelling needle and overcoming the problem of blood clotting and clogging of the indwelling needle after limb activity.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and more specifically to a slow-release sealing device. Background Technology

[0002] Currently, indwelling intravenous needles are commonly used medical devices in nursing work. They are convenient to use and reduce the number of punctures required for patients, thereby reducing repeated punctures during clinical infusions, reducing patient pain and the workload of clinical nursing staff. As a result, they have been widely used in clinical practice today.

[0003] However, if the indwelling needle is not flushed in time after the infusion is completed, or if blood backflow occurs due to limb movement after flushing, the indwelling needle may become blocked. Therefore, a slow-release flushing device is provided to solve this problem. Summary of the Invention

[0004] The purpose of this invention is to provide a slow-release sealing device to solve the problem of blocked catheters caused by blood backflow due to limb movement after sealing if the indwelling needle is not sealed in time.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a slow-release sealing device, comprising a retention needle with a stopcock end, and further comprising: an installation tube having an injection hole and a liquid storage chamber communicating with each other, the installation tube being connected to the stopcock end so that the injection hole communicates with the retention needle; a pressure valve disposed in the injection hole; and a liquid pushing assembly comprising a pushing member disposed in the liquid storage chamber and performing piston-like movement, the pushing member having a protrusion and a piercing tip; wherein the piercing tip pierces the pressure valve to form a pressure chamber.

[0006] Preferably, it includes an airbag component, which has an annular portion extending into an injection hole.

[0007] Preferably, the device also includes a mounting sleeve that is movably disposed on the outside of the mounting tube, wherein the airbag component has a protrusion that extends out to the outside of the mounting tube and is coaxially arranged with the mounting sleeve.

[0008] Preferably, the protrusion is provided with a plurality of indicator portions, and the mounting sleeve is provided with a squeezing portion, and the mounting sleeve is driven to move so that the squeezing portion moves and aligns with the plurality of indicator portions.

[0009] Preferably, the first end of the extrusion portion is provided with a guide surface that is inclined toward the protrusion portion.

[0010] Preferably, the mounting tube is further provided with an elastic element for driving the push-out member to move closer to the pressure valve.

[0011] Preferably, the annular surface of the airbag component is covered with a rubber separator layer.

[0012] Preferably, the mounting tube is made of rubber.

[0013] Preferably, the ejector is a medical-grade PVC plastic component.

[0014] Preferably, the pressure valve is a multi-valve valve.

[0015] In the above technical solution, the slow-release sealing device provided by the present invention has the following beneficial effects: By using the pressure valve provided in the injection hole of the installation tube and the pusher provided in the reservoir cavity, the installation tube can be installed on the stopcock end of the indwelling needle. At this time, the injection hole is connected to the indwelling needle, and the reservoir cavity is pre-stored with sealing fluid. The pusher of the pusher assembly can slide along the reservoir cavity so that the sealing fluid passes through the pressure valve from the injection hole and gradually enters the indwelling needle to achieve the sealing effect on the indwelling needle, thereby overcoming the problem of blood coagulation and blockage of the indwelling needle after limb activity. Secondly, after the sealing fluid in the reservoir cavity is completely pushed out by the pusher, the protrusion extends into the injection hole due to the movement of the pusher so that the puncture tip punctures the pressure valve. At this time, the reservoir cavity and the injection hole form a pressure cavity connected to the inside of the indwelling needle due to the reduction in volume. The pressure in the pressure cavity further prevents blood from flowing back to the inner wall of the indwelling needle and forming a blockage. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this invention. For those skilled in the art, other drawings can be obtained based on these drawings.

[0017] Figure 1 This is a schematic diagram of the overall structure provided for an embodiment of the present invention;

[0018] Figure 2 This is a partial structural schematic diagram of the overall structure provided in the embodiments of the present invention;

[0019] Figure 3 This is a schematic cross-sectional view of the overall structure provided for an embodiment of the present invention.

[0020] Explanation of reference numerals in the attached figures:

[0021] 1. Installation tube; 11. Installation part; 12. Injection hole; 13. Liquid storage chamber; 2. Pressure valve; 3. Push-out part; 31. Protrusion part; 311. Puncture tip; 4. Airbag part; 41. Ring-shaped part; 42. Protrusion part; 421. Indicator part; 5. Installation sleeve; 51. Compression part; 6. Elastic part. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0023] like Figure 1-3 As shown, a slow-release sealing device includes a retention needle with a stopcock end, and further includes: an installation tube 1 with an injection hole 12 and a liquid storage chamber 13 communicating with each other, the installation tube 1 being connected to the stopcock end so that the injection hole 12 is connected to the retention needle; a pressure valve 2 disposed in the injection hole 12; and a liquid pushing assembly including a pusher 3 disposed in the liquid storage chamber 13 and performing piston movement, the pusher 3 being provided with a protrusion 31 and a piercing tip 311; wherein the piercing tip 311 pierces the pressure valve 2 to form a pressure chamber.

[0024] Specifically, such as Figure 1 As shown, a mounting part 11 is provided on the outer side of one end of the injection hole 12 of the mounting tube 1. The mounting part 11 is threaded so that it can be threaded onto the stopcock end of the indwelling needle. At this time, the injection hole 12 is connected to the inside of the indwelling needle, and the liquid storage chamber 13 is pre-stored with sealing fluid, such as... Figure 3As shown, the pusher 3 of the fluid pushing assembly is driven to slide axially along the reservoir 13. The pusher 3 gradually approaches the injection port 12 so that the sealing fluid is pushed out and flows into the injection port 12. Due to the pushing pressure, the sealing fluid passes through the pressure valve 2 and gradually flows into the indwelling needle to achieve the sealing effect on the indwelling needle, thereby overcoming the problem of blood coagulation and blockage of the indwelling needle after the patient's limb movement. The sealing fluid is slowly released into the indwelling needle by the pusher 3 and the pressure valve 2 to achieve a continuous sealing effect. Secondly, after the sealing fluid in the reservoir 13 is completely pushed out by the pusher 3, the protrusion 31 extends into the injection port 12 due to the movement of the pusher 3 so that the puncture tip 311 punctures the pressure valve 2. At this time, the internal volume of the reservoir 13 and the injection port 12 is reduced due to the movement of the pusher 3, and the puncture tip 311 punctures the pressure valve 2. The injection hole 12 is punctured to directly connect with the inside of the indwelling needle, thereby forming a pressure chamber in the injection hole 12 that is connected to the inside of the indwelling needle. The pressure in the pressure chamber further prevents blood from flowing back to the inner wall of the indwelling needle and causing blockage. As another embodiment of the present invention, a rotating worm spring can be additionally provided at one end of the pusher 3. When the pusher 3 of the pusher assembly is driven to slide axially along the reservoir 13, the pusher 3 is driven by the rotating worm spring to maintain axial rotation while sliding axially, so as to drive the sealing fluid in the reservoir 13 to mix and stir, thereby preventing precipitation in the sealing fluid due to the slow pusher speed. Secondly, the axial rotation of the pusher 3 can drive the puncture tip 311 to rotate synchronously so that the puncture tip 311 can puncture the pressure valve 2 to realize the connection between the pressure chamber and the inside of the indwelling needle, increasing the stability of use.

[0025] In the above technical solution, by utilizing the pressure valve 2 provided in the injection hole 12 of the installation tube 1 and the pusher 3 provided in the reservoir 13, the installation tube 1 can be installed on the stopcock end of the indwelling needle. At this time, the injection hole 12 is connected to the indwelling needle, and the reservoir 13 is pre-stored with sealing fluid. The pusher 3 of the pusher assembly can slide along the reservoir 13 so that the sealing fluid passes through the pressure valve 2 from the injection hole 12 and gradually enters the indwelling needle to achieve the sealing effect on the indwelling needle, thereby overcoming the problem of blood coagulation and blockage of the indwelling needle after limb activity. Secondly, after the sealing fluid in the reservoir 13 is completely pushed out by the pusher 3, the protrusion 31 extends into the injection hole 12 due to the movement of the pusher 3 so that the puncture tip 311 punctures the pressure valve 2. At this time, the reservoir 13 and the injection hole 12 form a pressure chamber connected to the inside of the indwelling needle due to the reduction in volume. The pressure in the pressure chamber further prevents blood from flowing back to the inner wall of the indwelling needle and causing blockage.

[0026] As a further embodiment of the present invention, it also includes an adjustment component, which includes an airbag 4, and the airbag 4 is provided with an annular portion 41 extending into the injection hole 12.

[0027] Specifically, such as Figure 2As shown, it also includes an airbag component 4 disposed on the mounting tube 1. The airbag component 4 has a through hole to form an annular portion 41, and the annular portion 41 extends into the injection hole 12 of the mounting tube 1 so that the through hole and the injection hole 12 are coaxially connected. This allows the annular portion 41 of the airbag component 4 to continue to inflate, thereby reducing the cross-sectional area of ​​the through hole. When the annular portion 41 is inflated to its maximum, the inner rings of the annular portion 41 abut against each other, causing the through hole to disappear. At this time, the annular portion 41 seals the injection hole 12 to prevent the outflow of sealing fluid. When the annular portion 41 is inflated to its minimum position, the inner ring of the annular portion 41 forms a through hole with the same diameter as the injection hole 12. By utilizing the through hole formed by the inner ring of the annular portion 41 of the airbag component 4, the degree of inflation of the annular portion 41 can be controlled to achieve the flow of fluid through the injection hole 12. The cross-sectional area is adjusted to change the outflow rate of the sealing fluid, so as to adjust the outflow rate of the sealing fluid and achieve different sealing time adjustments. Furthermore, when the sealing fluid in the reservoir 13 is completely pushed out by the pusher 3, the protrusion 31 extends into the injection hole 12 due to the movement of the pusher 3. At this time, the protrusion 31 extends into the inner ring of the annular part 41 to separate the injection hole 12 and the reservoir 13 from each other, and a pressure chamber is formed in the injection hole 12. The annular part 41 can continue to be filled or reduced to change the pressure of the pressure chamber inside the injection hole 12, thereby facilitating the pressure adjustment in the indwelling needle. As another embodiment of the present invention, the airbag 4 can be connected to an external air source or a gas-driven component such as a balloon to inflate the annular part 41.

[0028] As a further embodiment of the present invention, it also includes an installation sleeve 5 movably disposed on the outside of the installation tube 1, and an extension portion 42 extending out to the outside of the installation tube 1 and coaxially arranged with the installation sleeve 5 is fixedly connected to the airbag component 4.

[0029] Specifically, such as Figure 3 As shown, the mounting sleeve 5 is threaded onto the outside of the mounting tube 1, and the protruding part 42 of the airbag 4 extends to the outside of the mounting tube 1 and is connected to the annular part 41 of the airbag 4. The mounting sleeve 5 can be driven to rotate so that it moves axially to squeeze the annular part 41. The interior of the airbag 4 is completely sealed. When the annular part 41 is squeezed, the annular part 41 will be filled due to the change in air pressure inside the airbag 4. The degree of filling of the annular part 41 can be changed by rotating the mounting sleeve 5 to adjust the injection speed of the sealing fluid. Secondly, after the mounting sleeve 5 rotates to squeeze the protruding part 42, the squeezed protruding part 42 is wrapped inside the mounting sleeve 5 to achieve the protective effect of the airbag 4 and avoid damage to the airbag 4. As another embodiment provided by the present invention, the mounting sleeve 5 can also achieve the effect of axial movement to squeeze the protruding part 42 by means of a slider and a groove.

[0030] As another embodiment of the present invention, the protrusion 42 is provided with a plurality of indicator portions 421, and the mounting sleeve 5 is provided with a pressing portion 51. The mounting sleeve 5 is driven to move so that the pressing portion 51 moves and aligns with the plurality of indicator portions 421.

[0031] Specifically, such as Figure 3 As shown, a plurality of indicator portions 421 are provided on the protrusion 42, and a pressing portion 51 is provided on the mounting sleeve 5. When the mounting sleeve 5 is driven to move axially, the pressing portion 51 moves axially to press the protrusion 42 to fill the annular portion 41. The filling status of the annular portion 41 is reflected by the alignment of the end of the pressing portion 51 with the plurality of indicator portions 421. Figure 3 When the leftmost indicator 421 is aligned with the leftmost indicator, the annular portion 41 is filled to its maximum size so that its inner annular through hole disappears. At this time, the injection hole 12 is blocked and the sealing fluid cannot flow into the retention needle. When the end of the squeezing portion 51 is aligned with the leftmost indicator 421, the leftmost indicator 421 is filled to its maximum size so that its inner annular through hole disappears. At this time, the injection hole 12 is blocked and the sealing fluid cannot flow into the retention needle. Figure 3 When the rightmost indicator 421 is aligned, the annular part 41 is filled to its minimum so that the diameter of its inner ring through hole is consistent with that of the injection hole 12. At this time, the flow area of ​​the injection hole 12 is maximized, so that the sealing fluid flows into the retention needle to the maximum. The squeezing part 51 and the indicator 421 are used to indicate the diameter of the inner ring through hole of the annular part 41, which is convenient for actual use and for adjusting the flow rate of the sealing fluid.

[0032] As another embodiment of the present invention, the first end of the extrusion portion 51 is provided with a guide surface inclined toward the protrusion portion 42.

[0033] Specifically, such as Figure 3 As shown, the left end of the extrusion part 51 is the first end, and a guide surface inclined toward the protrusion part 42 is provided thereon. When the extrusion part 51 is driven to move axially to extrude the protrusion part 42, the guide surface of the extrusion part 51 first contacts the protrusion part 42 to achieve the guiding extrusion of the protrusion part 42. The area of ​​the extrusion part 51 when it contacts the protrusion part 42 is increased, thereby avoiding the problem of the extrusion part 51 puncturing the protrusion part 42. Secondly, the presence of the guide surface can also guide the extrusion part 42 after it is extruded into the inner side of the mounting sleeve 5 to be wrapped, thereby protecting the protrusion part 42.

[0034] As a further embodiment of the present invention, the mounting tube 1 is also provided with an elastic member 6 for driving the push-out member 3 to move closer to the pressure valve 2.

[0035] Specifically, the elastic element 6 is disposed inside the mounting tube 1 to drive the pusher 3 to move closer to the pressure valve 2, and the elastic element 6 can be a spring, elastic rubber or elastic plate or other elastic objects known to those skilled in the art.

[0036] As another embodiment of the present invention, the surface of the annular portion 41 of the airbag component 4 is covered with a rubber separator layer.

[0037] Specifically, the surface of the annular portion 41 of the airbag component 4 is covered with a rubber separator layer to prevent the sealing fluid from directly contacting the surface of the annular portion 41, which could cause corrosion damage to the airbag component 4 or contamination of the sealing fluid.

[0038] As another embodiment of the present invention, the ejector part 3 is a medical PVC plastic part.

[0039] Specifically, the ejector part 3, made of medical-grade PVC plastic, has good biocompatibility and blood compatibility, and exhibits low hemolysis and good anticoagulation properties, ensuring safe use.

[0040] As another embodiment of the present invention, the pressure valve 2 is a multi-valve valve.

[0041] Specifically, the pressure valve 2 is a multi-valve valve so that it can be punctured by the puncture tip 311, thereby forming a pressure chamber in the injection hole 12 and directly communicating with the retention needle.

[0042] Working principle: First, sealing fluid is pre-stored in the reservoir 13 of the mounting tube 1. The mounting tube 1 is threaded onto the stopcock end of the indwelling needle via the mounting part 11. At this time, the injection hole 12 is connected to the inside of the indwelling needle. The elastic element 6 drives the pusher 3 to slide axially in the reservoir 13 to gradually approach the injection hole 12 and push the sealing fluid into the injection hole 12. Due to the pushing pressure, the sealing fluid passes through the pressure valve 2 and gradually flows into the indwelling needle to achieve the sealing effect on the indwelling needle. The mounting sleeve 5 can also be rotated to make its squeezing part 51 move axially to squeeze the annular part 41. The inside of the airbag 4 is completely sealed. When the annular part 41 is squeezed, the degree of filling of the annular part 41 will change due to the change in air pressure inside the airbag 4, thereby realizing the adjustment of the flow cross-sectional area of ​​the injection hole 12 and the flow rate of the sealing fluid. The reaction can be achieved by aligning the end of the squeezing part 51 with several indicator parts 421. The filling status of the annular portion 41; after the sealing fluid in the reservoir 13 is completely pushed out by the pusher 3, the protrusion 31 extends into the injection hole 12 due to the movement of the pusher 3 so that the puncture tip 311 punctures the pressure valve 2. At this time, the internal volume of the reservoir 13 and the injection hole 12 is reduced due to the movement of the pusher 3, and the puncture tip 311 punctures the pressure valve 2 to directly connect the injection hole 12 and the indwelling needle, thereby forming a pressure chamber in the injection hole 12 that is connected to the indwelling needle. The pressure in the pressure chamber further prevents blood from flowing back to the inner wall of the indwelling needle and causing blockage. The protrusion 31 extends into the inner ring of the annular portion 41 to separate the injection hole 12 and the reservoir 13 from each other. It can still drive the mounting sleeve 5 to move and squeeze the protrusion 42 so that the annular portion 41 continues to be filled or reduced to a certain extent, thereby adjusting the pressure of the pressure chamber inside the injection hole 12 to achieve pressure adjustment in the indwelling needle.

[0043] The foregoing has only described certain exemplary embodiments of the present invention by way of illustration. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the foregoing drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A slow-release sealing device, comprising a retention needle with a stopcock disposed thereon, characterized in that, Also includes: The mounting tube (1) has an injection hole (12) and a liquid storage chamber (13) that are interconnected. The mounting tube (1) is connected to the end of the stopcock so that the injection hole (12) is connected to the retention needle. Pressure valve (2), which is disposed in injection port (12); The liquid pushing assembly includes a pusher (3) disposed in the liquid storage chamber (13) and performing piston movement. The pusher (3) is provided with a protrusion (31) and a piercing tip (311). The puncture tip (311) punctures the pressure valve (2) to form a pressure chamber; It also includes an adjustment component, which includes an airbag component (4) having an annular portion (41) extending into an injection hole (12). It also includes an installation sleeve (5) that is movably disposed on the outside of the installation tube (1), and the airbag component (4) has a protrusion (42) that extends out to the outside of the installation tube (1) and is coaxially arranged with the installation sleeve (5).

2. The slow-release sealing device according to claim 1, characterized in that, The protrusion (42) is provided with a plurality of indicator portions (421), and the mounting sleeve (5) is provided with a pressing portion (51). The mounting sleeve (5) is driven to move so that the pressing portion (51) moves and aligns with the plurality of indicator portions (421).

3. The slow-release sealing device according to claim 2, characterized in that, The first end of the extrusion part (51) is provided with a guide surface that is inclined toward the protrusion part (42).

4. The slow-release sealing device according to claim 1, characterized in that, The installation tube (1) is also provided with an elastic element (6) for driving the push-out element (3) to move closer to the pressure valve (2).

5. The slow-release sealing device according to claim 1, characterized in that, The surface of the annular portion (41) of the airbag component (4) is covered with a rubber separator layer.

6. The slow-release sealing device according to claim 1, characterized in that, The mounting tube (1) is a rubber component.

7. The slow-release sealing device according to claim 1, characterized in that, The ejector (3) is a medical PVC plastic component.

8. The slow-release sealing device according to claim 1, characterized in that, The pressure valve (2) is a multi-valve valve.

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