An indwelling needle

Abstract

The utility model relates to medical instrument technical field discloses a kind of indwelling needle, including tubular casing and puncture assembly.Tubular casing includes upper shell and lower shell, and upper shell and lower shell are detachably inserted.Puncture assembly includes main part and puncture needle, main part includes indwelling piece and the disassembling piece connected to the tail end of indwelling piece, and puncture needle one end is exposed to the front end of indwelling piece, and the other end passes through indwelling piece and is fixedly connected with disassembling piece.Upper shell and lower shell are surrounded and are formed to accommodate the first accommodating cavity for accommodating puncture assembly, and the end of puncture needle exposed to indwelling piece is located in upper shell, and first stop portion is provided on indwelling piece and extends along the circumference of indwelling piece, and second stop portion is provided in upper shell and extends along the circumference of upper shell, and second stop portion is used for abutting with first stop portion, and when second stop portion abuts with first stop portion, the end of puncture needle exposed to one end of indwelling piece is spaced apart from the inner wall of one end of upper shell away from lower shell.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to an indwelling needle. Background Technology

[0002] Currently, in the hemodialysis industry, blood purification treatment commonly uses disposable arteriovenous puncture needles. Compared to ordinary disposable arteriovenous puncture needles, disposable indwelling needles can minimize damage to the inner wall of autologous arteriovenous fistulas and artificial blood vessels, and allow for free arm movement during treatment, reducing the risk of vascular injury. Existing disposable indwelling needles are generally packaged in soft plastic, resulting in a larger size and poor protection for the needle, making them inconvenient for medical staff to carry and use.

[0003] Therefore, there is an urgent need for an indwelling needle to solve the above problems. Utility Model Content

[0004] The purpose of this invention is to provide an indwelling needle that is small in size and provides good protection for the puncture components.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] An indwelling needle, characterized in that it comprises a tubular housing and a puncture assembly;

[0007] The tubular housing includes an upper housing and a lower housing, and the upper housing and the lower housing are detachably connected.

[0008] The puncture assembly includes a main body and a puncture needle. The main body includes an indwelling member and a disassembly member connected to the tail end of the indwelling member. One end of the puncture needle is exposed at the front end of the indwelling member, and the other end passes through the indwelling member and is fixedly connected to the disassembly member.

[0009] The upper housing and the lower housing enclose a first receiving cavity for accommodating the puncture assembly. One end of the puncture needle protruding from the indwelling member is located inside the upper housing. The indwelling member is provided with a first stop portion extending circumferentially along the indwelling member. The upper housing is provided with a second stop portion extending circumferentially along the upper housing. The second stop portion is used to abut against the first stop portion. The end of the puncture needle protruding from the indwelling member is spaced apart from the inner wall of the end of the upper housing away from the lower housing.

[0010] As an improvement to the above technical solution, the indwelling device includes a flexible catheter, a connecting seat, a connecting tube, and an infusion connector connected in sequence. The tip of the puncture needle is exposed at the front end of the flexible catheter, and the puncture needle passes through the flexible catheter, the connecting seat, the connecting tube, and the infusion connector.

[0011] As an improvement to the above technical solution, the flexible catheter sidewall is provided with multiple side holes.

[0012] As an improvement to the above technical solution, the indwelling device further includes a connecting joint and an elastic seal. The connecting joint connects the infusion joint and the disassembly device. The elastic seal is provided inside the connecting joint. The puncture needle passes through the elastic seal, and the elastic seal squeezes the puncture needle to form a seal.

[0013] As an improvement to the above technical solution, the connecting connector includes a Luer connector and a socket. One end of the Luer connector is connected to the infusion connector, and the socket connects the Luer connector and the disassembly component. The elastic seal is disposed in the end of the Luer connector connected to the socket. A partition plate is disposed inside the socket, which separates the elastic seal from the disassembly component. A needle hole is provided on the partition plate for the puncture needle to pass through.

[0014] As an improvement to the above technical solution, the first stop is provided on the Luer joint.

[0015] As an improvement to the above technical solution, the connecting pipe is a flexible hose.

[0016] As an improvement to the above technical solution, the disassembly component includes a needle hub and a blood return observation device. The puncture needle is fixedly connected to the needle hub. The puncture needle is provided with a first drainage hole that extends through the puncture needle along its length. The needle hub is provided with a second drainage hole. The first drainage hole communicates with the blood return observation device through the second drainage hole.

[0017] As an improvement to the above technical solution, the disassembly component further includes a spring cover and a spring piece. One end of the spring cover is connected to the indwelling component, and the other end is connected to the needle seat. The spring piece is disposed inside the spring cover.

[0018] As an improvement to the above technical solution, the spring includes a base and a clamping foot. The clamping foot is fixed on the base and elastically clamps the puncture needle. The base is provided with a limiting part for limiting the axial sliding distance of the puncture needle.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] The indwelling needle of this invention has a puncture needle inserted into the indwelling component and fixedly connected to a disassembly component located at one end of the indwelling component. That is, the extension direction of the puncture needle is also the length direction of the puncture component. This allows the puncture component to be covered and protected by a tubular shell, resulting in a small overall size of the indwelling needle and good protection for the puncture component. Furthermore, by providing a second stop portion inside the upper shell and a first stop portion on the indwelling component, the cooperation of the first and second stop portions prevents the tip of the puncture needle from contacting the inner wall of the shell, thus protecting the puncture needle. When the indwelling needle is needed for vascular puncture, the upper and lower shells are separated, the puncture component is removed, and the puncture component can be used to perform vascular puncture. After the puncture is completed, the puncture needle is pulled out of the indwelling component by the disassembly component. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the indwelling needle provided in this embodiment of the utility model. Figure 1 ;

[0022] Figure 2 This is a schematic diagram of the structure of the indwelling needle provided in this embodiment of the utility model. Figure 2 ;

[0023] Figure 3 This is a cross-sectional view of the indwelling needle provided in this embodiment of the utility model;

[0024] Figure 4 This is a partial structural schematic diagram of the indwelling needle provided in an embodiment of the present utility model.

[0025] In the picture:

[0026] 1. Tubular shell; 11. Upper shell; 111. Second stop; 112. Annular protrusion; 12. Lower shell; 121. Snap-fit ​​protrusion;

[0027] 2. Puncture assembly;

[0028] 21. Main body;

[0029] 211. Indwelling component; 2111. First stop; 2112. Flexible catheter; 2113. Connecting seat; 2114. Connecting tube; 2115. Infusion connector; 2116. Connecting connector; 21161. Luer connector; 21162. Socket; 2117. Elastic seal;

[0030] 212. Disassembly component; 2121. Needle hub; 2122. Blood return observation device; 2123. Spring cover; 2124. Spring;

[0031] 22. Puncture needle;

[0032] 3. Longitudinal anti-slip ribs. Detailed Implementation

[0033] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0034] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0035] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0036] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0037] like Figures 1-4As shown, this embodiment provides an indwelling needle, including a tubular housing 1 and a puncture assembly 2. The tubular housing 1 includes an upper housing 11 and a lower housing 12, which are detachably connected. The puncture assembly 2 includes a main body 21 and a puncture needle 22. The main body 21 includes an indwelling member 211 and a disassembly member 212 connected to the tail end of the indwelling member 211. One end of the puncture needle 22 is exposed at the front end of the indwelling member 211, and the other end passes through the indwelling member 211 and is fixedly connected to the disassembly member 212. The upper housing 11 and the lower housing 12 form a first receiving cavity for accommodating the puncture assembly 2. One end of the puncture needle 22 exposed outside the indwelling member 211 is located inside the upper housing 11. The indwelling member 211 is provided with a first stop portion 2111 extending circumferentially along the indwelling member 211. The upper housing 11 is provided with a second stop portion 111 extending circumferentially along the upper housing 11. The second stop portion 111 is used to abut against the first stop portion 2111. When the second stop portion 111 abuts against the first stop portion 2111, the end of the puncture needle 22 exposed outside the indwelling member 211 is spaced apart from the end of the upper housing 11 away from the lower housing 12.

[0038] The indwelling needle provided in this embodiment has a puncture needle 22 inserted into the indwelling member 211 and fixedly connected to a disassembly member 212 located at one end of the indwelling member 211. That is to say, the extension direction of the puncture needle 22 is also the length direction of the puncture assembly 2. Thus, the puncture assembly 2 can be covered and protected by the tubular shell 1, resulting in a small overall size of the indwelling needle and good protection for the puncture assembly 2. In addition, by providing a second stop 111 in the upper shell 11 and a first stop 2111 on the indwelling member 211, the cooperation between the first stop 2111 and the second stop 111 prevents the tip of the puncture needle 22 from contacting the inner wall of the shell, thereby protecting the puncture needle 22. When it is necessary to use the indwelling needle to perform vascular puncture on the patient, the upper shell 11 and the lower shell 12 are separated, the puncture assembly 2 is taken out, and the puncture assembly 2 can be used to perform vascular puncture on the patient. After the puncture is completed, the puncture needle 22 can be pulled out from the indwelling assembly 211 by using the disassembly part 212.

[0039] Optionally, such as Figures 1-3 As shown, a snap-fit ​​protrusion 121 is provided on the outer wall of the lower housing 12, and an annular protrusion 112 is provided on the inner wall of the upper housing 11. When the lower housing 12 and the upper housing 11 are inserted, the snap-fit ​​protrusion 121 passes over the annular protrusion 112. The snap-fit ​​between the upper housing 11 and the lower housing 12 is achieved through the cooperation of the snap-fit ​​protrusion 121 and the annular protrusion 112, so that the upper housing 11 and the lower housing 12 can be stably inserted.

[0040] Optionally, such as Figures 1-3As shown, the indwelling device 211 includes a flexible catheter 2112, a connector 2113, a connecting tube 2114, and an infusion connector 2115 connected in sequence. The tip of the puncture needle 22 protrudes from the front end of the flexible catheter 2112, and the puncture needle 22 passes through the flexible catheter 2112, connector 2113, connecting tube 2114, and infusion connector 2115. After the puncture is completed and the puncture needle 22 is withdrawn, one end of the flexible catheter 2112 remains in the patient's blood vessel, and the flexible catheter 2112 can be connected to other infusion devices through the connector 2113, connecting tube 2114, and infusion connector 2115.

[0041] Furthermore, such as Figure 1 and Figure 2 As shown, the flexible conduit 2112 has multiple side holes on its sidewall. By providing side holes on the flexible conduit 2112, the flow rate of the flexible conduit 2112 can be increased.

[0042] Optionally, such as Figures 1-3 As shown, the indwelling device 211 also includes a connecting connector 2116 and an elastic seal 2117. The connecting connector 2116 connects the infusion connector 2115 and the disassembly device 212. The elastic seal 2117 is provided inside the connecting connector 2116, through which the puncture needle 22 passes. The elastic seal 2117 compresses the puncture needle 22 to form a seal. Furthermore, after the puncture needle 22 is withdrawn, the elastic seal 2117, through its own elasticity, can seal the passage left after the puncture needle 22 is withdrawn, preventing blood from flowing out.

[0043] Optionally, such as Figures 1-3 As shown, the connecting connector 2116 includes a Luer connector 21161 and a socket 21162. One end of the Luer connector 21161 is connected to the infusion connector 2115. The socket 21162 connects the Luer connector 21161 and the disassembly piece 212. An elastic seal 2117 is disposed within the end of the Luer connector 21161 connected to the socket 21162. A partition plate is disposed within the socket 21162, separating the elastic seal 2117 from the disassembly piece 212. The partition plate has a needle hole for the puncture needle 22 to pass through. The end of the infusion connector 2115 away from the connecting tube 2114 is connected to the Luer connector 21161. That is to say, when it is necessary to connect other infusion devices using the indwelling piece 211, it is only necessary to separate the connecting connector 2116 from the infusion connector 2115, and other infusion devices can be connected to the infusion connector 2115 through the new Luer connector 21161. The Luer connector 21161 is a commonly used connector in the art, and its structure and principle will not be described in detail here. In this embodiment, the first stop 2111 is provided on the Luer connector 21161 and is located at the end of the Luer connector 21161 that is connected to the infusion connector 2115.

[0044] Furthermore, such as Figure 1 and Figure 2 As shown, multiple longitudinal anti-slip ribs 3 are provided on the outer peripheral walls of both the Luer connector 21161 and the infusion connector 2115. These longitudinal anti-slip ribs 3 are spaced apart circumferentially along the Luer connector 21161 and circumferentially along the infusion connector 2115. By providing longitudinal anti-slip ribs 3 on the outer peripheral walls of the Luer connector 21161 and the infusion connector 2115, slippage during clinical use of the indwelling needle is prevented, facilitating operation.

[0045] Furthermore, the connecting tube 2114 is a flexible tube. When other infusion devices need to connect the indwelling part 211, the connecting tube 2114 can be clamped first, and then the infusion connector 2115 and the connecting connector 2116 can be separated.

[0046] Optionally, such as Figures 1-3 As shown, the disassembly component 212 includes a needle hub 2121 and a blood return observation device 2122. The puncture needle 22 is fixedly connected to the needle hub 2121. The puncture needle 22 is provided with a first drainage hole that passes through the puncture needle 22 along its length. The needle hub 2121 is provided with a second drainage hole. The first drainage hole communicates with the blood return observation device 2122 through the second drainage hole. By observing the blood return through the blood return observation device 2122, it is easy to determine whether the puncture needle 22 has been accurately inserted into the patient's blood vessel.

[0047] Optionally, such as Figure 2 and Figure 4As shown, the disassembly component 212 also includes a spring cover 2123 and a spring piece 2124. One end of the spring cover 2123 is detachably connected to the indwelling member 211, and the other end is fixedly connected to the needle seat 2121. In this embodiment, the spring cover 2123 and the indwelling member 211 are detachably plugged in. The spring piece 2124 is disposed inside the spring cover 2123. The spring piece 2124 includes a base and a clamping foot. The clamping foot is fixedly connected to the base, and the end of the clamping foot away from the base elastically clamps the puncture needle 22. The base is provided with a limiting part that limits the axial sliding distance of the puncture needle 22. In this embodiment, the limiting part is a limiting hole provided on the base. The puncture needle 22 passes through the limiting hole and can slide axially relative to the limiting hole. The axial direction refers to the extension direction of the puncture needle 22. The end of the puncture needle 22 furthest from the disassembly component 212 is provided with a limiting section. The diameter of the limiting section is larger than the diameter of the limiting hole, thus preventing the tip of the puncture needle 22 from being pulled out of the limiting hole. Two clamping feet are provided, each with a bent portion on its edge furthest from the base to prevent the tip of the puncture needle 22 from protruding. Before the disassembly component 212 is disassembled, the puncture needle 22 passes through the limiting hole and opens the bent portions of the two clamping feet. Under the action of elastic restoring force, the bent portions of the two clamping feet abut against the outer wall of the puncture needle 22. During the withdrawal of the puncture needle 22, when the tip of the puncture needle 22 enters the clamping feet, the clamping feet will recover due to their own elasticity and completely enclose the tip of the puncture needle 22 through the bent portions. In other words, after the disassembly part 212 is removed from the indwelling part 211, the limiting hole and the limiting section of the puncture needle 22 cooperate to prevent the puncture needle 22 from being completely pulled out of the spring piece 2124, and the bent parts of the two spring pieces 2124 wrap around the tip of the puncture needle 22 to prevent the tip of the puncture needle 22 from being exposed, thereby preventing the puncture needle 22 from puncturing the personnel.

[0048] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and substitutions can be made without departing from the technical principles of the present utility model, and these improvements and substitutions should also be considered within the protection scope of the present utility model.

Claims

1. An indwelling needle, characterized in that, It includes a tubular shell (1) and a puncture assembly (2); The tubular housing (1) includes an upper housing (11) and a lower housing (12), wherein the upper housing (11) and the lower housing (12) are detachably connected. The puncture assembly (2) includes a main body (21) and a puncture needle (22). The main body (21) includes an indwelling member (211) and a disassembly member (212) connected to the tail end of the indwelling member (211). One end of the puncture needle (22) is exposed at the front end of the indwelling member (211), and the other end passes through the indwelling member (211) and is fixedly connected to the disassembly member (212). The upper housing (11) and the lower housing (12) form a first receiving cavity for accommodating the puncture assembly (2). One end of the puncture needle (22) exposed outside the indwelling member (211) is located inside the upper housing (11). The indwelling member (211) is provided with a first stop portion (2111) extending circumferentially along the indwelling member (211). The upper housing (11) is provided with a second stop portion (111) extending circumferentially along the upper housing (11). The second stop portion (111) is used to abut against the first stop portion (2111). When the second stop portion (111) abuts against the first stop portion (2111), the end of the puncture needle (22) exposed outside the indwelling member (211) is spaced apart from the inner wall of the end of the upper housing (11) away from the lower housing (12).

2. The indwelling needle according to claim 1, characterized in that, The indwelling device (211) includes a flexible catheter (2112), a connector (2113), a connecting tube (2114), and an infusion connector (2115) connected in sequence. The tip of the puncture needle (22) is exposed at the front end of the flexible catheter (2112), and the puncture needle (22) passes through the flexible catheter (2112), the connector (2113), the connecting tube (2114), and the infusion connector (2115).

3. The indwelling needle according to claim 2, characterized in that, The flexible conduit (2112) has multiple side holes on its sidewall.

4. The indwelling needle according to claim 2, characterized in that, The indwelling device (211) further includes a connecting joint (2116) and an elastic seal (2117). The connecting joint (2116) connects the infusion joint (2115) and the disassembly device (212). The elastic seal (2117) is provided inside the connecting joint (2116), and the puncture needle (22) passes through the elastic seal (2117).

5. The indwelling needle according to claim 4, characterized in that, The connecting connector (2116) includes a Luer connector (21161) and a socket (21162). One end of the Luer connector (21161) is connected to the infusion connector (2115). The socket (21162) connects the Luer connector (21161) and the disassembly component (212). The elastic seal (2117) is disposed in the end where the Luer connector (21161) and the socket (21162) are connected. A partition plate is disposed in the socket (21162). The partition plate separates the elastic seal (2117) and the disassembly component (212). A needle hole is provided on the partition plate for the puncture needle (22) to pass through.

6. The indwelling needle according to claim 5, characterized in that, The first stop (2111) is disposed on the Luer joint (21161).

7. The indwelling needle according to claim 5, characterized in that, The connecting pipe (2114) is a flexible hose.

8. The indwelling needle according to claim 1, characterized in that, The disassembly component (212) includes a needle hub (2121) and a blood return observation device (2122). The puncture needle (22) is fixedly connected to the needle hub (2121). The puncture needle (22) is provided with a first drainage hole that passes through the puncture needle (22) along the length direction of the puncture needle (22). The needle hub (2121) is provided with a second drainage hole. The first drainage hole communicates with the blood return observation device (2122) through the second drainage hole.

9. The indwelling needle according to claim 8, characterized in that, The disassembly component (212) further includes a spring cover (2123) and a spring (2124). One end of the spring cover (2123) is connected to the indwelling component (211), and the other end is connected to the needle seat (2121). The spring (2124) is disposed inside the spring cover (2123).

10. The indwelling needle according to claim 9, characterized in that, The spring (2124) includes a base and a clamp. The clamp is fixed on the base and the clamp elastically clamps the puncture needle (22). The base is provided with a limiting part for limiting the axial sliding distance of the puncture needle (22).

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