Remaining needle with filter

Abstract

The utility model discloses an indwelling needle with filters, which belongs to the field of indwelling needles and comprises an indwelling needle component, a double-filter component and a connecting tube component, the double-filter component is communicated between the indwelling needle component and the connecting tube component, or the connecting tube component is communicated between the indwelling needle component and the double-filter component. The filter has the technical effects that the filter is good in filtering performance and good in replacement convenience.

Description

Technical Field

[0001] The utility model relates to an indwelling needle, in particular to an indwelling needle with a filter. Background Art

[0002] An indwelling needle is an infusion tool that can avoid repeated punctures and reduce the pain of needle insertion. It has the advantage of good safety performance and is widely used in the field of infusion.

[0003] In order to increase the filtering performance, a filter is generally connected outside the infusion bag, and then the indwelling needle is connected through the filter. However, the filtering performance of the related filter is poor, and it is difficult to filter particulate matter and air at the same time. Moreover, when infusing multiple times, it is necessary to replace the infusion bag and the filter at the same time, and the replacement convenience is poor. Content of the Utility Model

[0004] Object of the Invention: The object of the utility model is to provide an indwelling needle with a filter, which not only has good filtering performance but also good replacement convenience.

[0005] Technical Solution: An indwelling needle with a filter includes an indwelling needle assembly, a dual filter assembly, and an adapter tube assembly. The dual filter assembly is connected between the indwelling needle assembly and the adapter tube assembly, or the adapter tube assembly is connected between the indwelling needle assembly and the dual filter assembly.

[0006] Optionally, the dual filter assembly includes:

[0007] A housing, which is provided with a receiving cavity inside;

[0008] A filter membrane connected inside the housing, so that the receiving cavity is configured as a first cavity and a second cavity respectively located on both sides of the filter membrane;

[0009] Wherein, the first cavity is connected to the indwelling needle assembly, the second cavity is connected to the adapter tube assembly, or the first cavity is connected to the adapter tube assembly.

[0010] Optionally, the dual filter assembly further includes:

[0011] A plurality of guide plates spacedly connected inside the housing;

[0012] A plurality of guide grooves formed between adjacent guide plates;

[0013] Wherein, the plurality of guide plates and the plurality of guide grooves are both located in the first cavity.

[0014] Optionally, the dual filter assembly further includes:

[0015] A first opening provided on one side of the housing, the first opening communicating with the first cavity;

[0016] A second opening provided on the other side of the housing, the second opening communicating with the second cavity;

[0017] Wherein, the first opening communicates with the indwelling needle assembly, the second opening communicates with the connecting tube assembly, or the first opening communicates with the connecting tube assembly.

[0018] Optionally, along the direction from the second opening to the first opening, the cross-sectional dimension of the second cavity gradually decreases.

[0019] Optionally, the dual filter assembly further includes a plurality of ventilation holes provided on the housing, and the plurality of ventilation holes communicate with the second cavity.

[0020] Optionally, the dual filter assembly further includes a breathable and water-blocking membrane connected inside the housing, and the breathable and water-blocking membrane covers the plurality of ventilation holes.

[0021] Optionally, the indwelling needle assembly is a stab-proof indwelling needle assembly or a non-stab-proof indwelling needle assembly.

[0022] Optionally, the connecting tube assembly includes:

[0023] A body part;

[0024] At least two connecting tubes all connected to one end of the body part;

[0025] Wherein, the dual filter assembly is connected between the other end of the indwelling needle assembly and the body part of the connecting tube assembly, or the other end of the body part of the connecting tube assembly communicates with the indwelling needle assembly, and one of the connecting tubes of the connecting tube assembly communicates with the dual filter assembly.

[0026] Optionally, it further includes a stop clamp cooperating with the indwelling needle assembly, the dual filter assembly or the connecting tube assembly.

[0027] Advantageous effects:

[0028] 1) The dual filter assembly is used to achieve dual filtration of particulate matter and air, with good filtration performance. Specifically, when the dual filter assembly is connected between the indwelling needle assembly and the connecting tube assembly, and when the syringe infuses liquid through one of the connecting tubes of the connecting tube assembly, the dual filter assembly is convenient for filtering particulate matter and air in the liquid medicine, preventing particulate matter and air from entering the patient's body and causing problems such as blood vessel thrombosis.

[0029] 2) This application integrates the dual filter component and the indwelling needle component with each other, facilitating the replacement of only the infusion bag during multiple infusions, without the need to replace both the infusion bag and the filter simultaneously, thus providing good replacement convenience. Description of the Drawings

[0030] Figure 1 is a schematic structural view of an indwelling needle with a filter according to the present utility model;

[0031] Figure 2 is a schematic structural view of the dual filter component of the present utility model;

[0032] Figure 3 is Figure 2 the sectional view taken along A - A in

[0033] In the figures: 1, indwelling needle component; 2, dual filter component; 21, outer shell; 211, first cavity; 212, second cavity; 213, first opening; 214, second opening; 215, air vent hole; 22, filter membrane; 23, guide plate; 24, air - permeable and water - blocking membrane; 3, connecting tube component; 31, body part; 32, connecting tube; 4, stop - flow clamp. Detailed Embodiments

[0034] To make the technical solutions of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and specific embodiments.

[0035] Embodiment 1

[0036] Combined with Figures 1-3 , this embodiment provides an indwelling needle with a filter, including an indwelling needle component 1, a dual filter component 2, and a connecting tube component 3. The dual filter component 2 is connected between the indwelling needle component 1 and the connecting tube component 3, or the connecting tube component 3 is connected between the indwelling needle component 1 and the dual filter component 2.

[0037] Specifically, the indwelling needle component 1 is used for indwelling in the patient's body to avoid repeated punctures; the dual filter component 2 is used to achieve dual filtration of particulate matter and air, with good filtration performance; the connecting tube component 3 is used to directly communicate with infusion devices such as infusion bags and infusion bottles, or the connecting tube component 3 is used to indirectly communicate with infusion devices such as infusion bags and infusion bottles through the dual filter component 2; this application integrates the dual filter component 2 and the indwelling needle component 1 with each other, facilitating the replacement of only the infusion bag during multiple infusions, without the need to replace both the infusion bag and the filter simultaneously, thus providing good replacement convenience.

[0038] Furthermore, as Figure 3 , the dual filter component 2 includes:

[0039] An outer shell 21, with a receiving cavity provided inside the outer shell 21;

[0040] A filter membrane 22 is connected inside the housing 21, so that the accommodating cavity is configured as a first cavity 211 and a second cavity 212 respectively located on both sides of the filter membrane 22;

[0041] Wherein, the first cavity 211 is communicated with the indwelling needle assembly 1, the second cavity 212 is communicated with the connecting tube assembly 3, or the first cavity 211 is communicated with the connecting tube assembly 3.

[0042] Specifically, during use, the liquid medicine flows into from the second cavity 212, passes through the filter membrane 22, and then flows out from the first cavity 211; the housing 21 is used to carry the first cavity 211, the second cavity 212, etc.; the filter membrane 22 can be a polyethersulfone filter membrane or the like.

[0043] Furthermore, as Figure 3 , the dual filter assembly 2 further includes:

[0044] A plurality of guide plates 23 spaced and connected inside the housing 21;

[0045] A plurality of guide grooves formed between adjacent guide plates 23;

[0046] Wherein, the plurality of guide plates 23 and the plurality of guide grooves are both located in the first cavity 211.

[0047] Specifically, the plurality of guide plates 23 are used to form the plurality of guide grooves; the plurality of guide grooves are used to generate a guiding effect on the liquid medicine, so as to facilitate increasing the flow stability of the liquid medicine.

[0048] Furthermore, as Figure 3 , the dual filter assembly 2 further includes:

[0049] A first opening 213 provided on one side of the housing 21, and the first opening 213 is communicated with the first cavity 211;

[0050] A second opening 214 provided on the other side of the housing 21, and the second opening 214 is communicated with the second cavity 212;

[0051] Wherein, the first opening 213 is communicated with the indwelling needle assembly 1, the second opening 214 is communicated with the connecting tube assembly 3, or the first opening 213 is communicated with the connecting tube assembly 3.

[0052] Furthermore, as Figure 3 , along the direction from the second opening 214 to the first opening 213, the cross-sectional dimension of the second cavity 212 gradually decreases.

[0053] Specifically, along the flowing direction of the liquid medicine, the cross-sectional dimension of the second cavity 212 gradually decreases, which not only facilitates the second cavity 212 to have a certain guiding effect on the liquid medicine, but also facilitates the filtered particulate matters to move away from the second opening 214, preventing the particulate matters from prematurely blocking the entire filter membrane 22 and ensuring the filtering efficiency.

[0054] Further, as Figures 2-3 , the double filter assembly 2 further includes a plurality of air-permeable holes 215 provided on the housing 21, and the plurality of air-permeable holes 215 are all communicated with the second cavity 212.

[0055] Specifically, the plurality of air-permeable holes 215 are all used for air permeability (i.e., filtering the air in the liquid medicine), so as to ensure the air pressure balance inside and outside the double filter assembly 2.

[0056] Further, as Figures 2-3 , the double filter assembly 2 further includes a breathable water-blocking membrane 24 connected inside the housing 21, and the breathable water-blocking membrane 24 covers the plurality of air-permeable holes 215.

[0057] Specifically, the breathable water-blocking membrane 24 is used for air permeability (i.e., filtering the air in the liquid medicine) and water blocking, preventing the liquid medicine inside the housing 21 from flowing out. The material of the breathable water-blocking membrane 24 can be an EPTFE membrane or a PDFE membrane, etc.

[0058] Further, as Figure 1 , the indwelling needle assembly 1 is a puncture-proof indwelling needle assembly or a non-puncture-proof indwelling needle assembly.

[0059] Further, as Figure 1 , the connecting tube assembly 3 includes:

[0060] a body part 31;

[0061] at least two connecting tubes 32 that are all communicated with one end of the body part 31;

[0062] Wherein, the double filter assembly 2 is communicated between the indwelling needle assembly 1 and the other end of the body part 31 of the connecting tube assembly 3, or the other end of the body part 31 of the connecting tube assembly 3 is communicated with the indwelling needle assembly 1, and one of the connecting tubes 32 of the connecting tube assembly 3 is communicated with the double filter assembly 2.

[0063] Specifically, the at least two connecting tubes 32 facilitate to increase the functional diversity.

[0064] Further, as Figure 1 , it further includes a stop clamp 4 that cooperates with the indwelling needle assembly 1, the double filter assembly 2 or the connecting tube assembly 3.

[0065] Specifically, the stop clamp 4 is used to adjust the flow rate of the liquid medicine.

[0066] The above embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent for the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these all fall within the protection scope of the present invention. Therefore, the protection scope of the patent for the present invention shall be subject to the appended claims.

Claims

1. An indwelling needle with a filter, characterized in that: It comprises an indwelling needle assembly, a double filter assembly and a connecting tube assembly. The double filter assembly is connected between the indwelling needle assembly and the connecting tube assembly, or the connecting tube assembly is connected between the indwelling needle assembly and the double filter assembly.

2. The indwelling needle with a filter according to claim 1, characterized in that: The dual filter assembly comprises: A housing, wherein a receiving cavity is provided in the housing; A filter membrane connected to the housing so that the accommodating cavity is configured as a first cavity and a second cavity respectively located on both sides of the filter membrane; Wherein, the first cavity is communicated with the indwelling needle assembly, the second cavity is communicated with the connecting tube assembly, or the first cavity is communicated with the connecting tube assembly.

3. The indwelling needle with a filter according to claim 2, characterized in that: The dual filter assembly further comprises: A plurality of guide plates connected to the housing at intervals; A plurality of guide grooves formed between adjacent guide plates; Wherein, the plurality of guide plates and the plurality of guide grooves are all located in the first cavity.

4. The indwelling needle with a filter according to claim 2, characterized in that: The dual filter assembly further comprises: A first opening provided on one side of the housing, the first opening being in communication with the first cavity; a second opening disposed on the other side of the housing, the second opening being in communication with the second cavity; Wherein, the first opening is communicated with the indwelling needle assembly, the second opening is communicated with the connecting tube assembly, or the first opening is communicated with the connecting tube assembly.

5. The indwelling needle with a filter according to claim 4, characterized in that: Along the direction from the second opening to the first opening, the cross-sectional size of the second cavity gradually decreases.

6. The indwelling needle with a filter according to claim 2, characterized in that: The double filter assembly further comprises a plurality of air holes arranged on the outer shell, and the plurality of air holes are all communicated with the second cavity.

7. The indwelling needle with a filter according to claim 6, characterized in that: The dual filter assembly further comprises a breathable and water-blocking membrane connected to the housing, wherein the breathable and water-blocking membrane covers the plurality of breathable holes.

8. An indwelling needle with a filter according to any one of claims 1 to 7, characterized in that: The indwelling needle assembly is a puncture-proof indwelling needle assembly or a non-puncture-proof indwelling needle assembly.

9. An indwelling needle with a filter according to any one of claims 1 to 7, characterized in that: The connecting pipe assembly comprises: Body part; at least two connecting pipes both connected to one end of the main body; Wherein, the double filter assembly is connected between the indwelling needle assembly and the other end of the main body of the connecting tube assembly, or the other end of the main body of the connecting tube assembly is connected to the indwelling needle assembly, and one of the connecting tubes of the connecting tube assembly is connected to the double filter assembly.

10. An indwelling needle with a filter according to any one of claims 1 to 7, characterized in that: It also includes a flow-stop clamp that cooperates with the indwelling needle assembly, the dual filter assembly or the connecting tube assembly.

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