CN111111001A - Filter joint for indwelling venous tubing and method of use - Google Patents

Filter joint for indwelling venous tubing and method of use Download PDF

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Publication number
CN111111001A
CN111111001A CN202010007782.7A CN202010007782A CN111111001A CN 111111001 A CN111111001 A CN 111111001A CN 202010007782 A CN202010007782 A CN 202010007782A CN 111111001 A CN111111001 A CN 111111001A
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China
Prior art keywords
box body
filter
filtering
movable buckle
axial
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Pending
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CN202010007782.7A
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Chinese (zh)
Inventor
赵甜
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Tongji Medical College of Huazhong University of Science and Technology
Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Union Hospital Tongji Medical College Huazhong University of Science and Technology
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Priority to CN202010007782.7A priority Critical patent/CN111111001A/en
Publication of CN111111001A publication Critical patent/CN111111001A/en
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    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M39/00—Tubes, tube connectors, tube couplings, valves, access sites or the like, specially adapted for medical use
    • A61M39/10—Tube connectors; Tube couplings
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/14—Infusion devices, e.g. infusing by gravity; Blood infusion; Accessories therefor
    • A61M5/165—Filtering accessories, e.g. blood filters, filters for infusion liquids
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D29/00—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor
    • B01D29/50—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition
    • B01D29/56—Filters with filtering elements stationary during filtration, e.g. pressure or suction filters, not covered by groups B01D24/00 - B01D27/00; Filtering elements therefor with multiple filtering elements, characterised by their mutual disposition in series connection
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D35/00—Filtering devices having features not specifically covered by groups B01D24/00 - B01D33/00, or for applications not specifically covered by groups B01D24/00 - B01D33/00; Auxiliary devices for filtration; Filter housing constructions
    • B01D35/30—Filter housing constructions
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/75—General characteristics of the apparatus with filters
    • A61M2205/7545—General characteristics of the apparatus with filters for solid matter, e.g. microaggregates

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  • Health & Medical Sciences (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Engineering & Computer Science (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Anesthesiology (AREA)
  • Public Health (AREA)
  • Vascular Medicine (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Pulmonology (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a filter joint for an indwelling venous pipeline and a using method thereof. The invention is used for the filter joint of the indwelling venous duct, the filter box body is respectively detachably connected with the indwelling needle tube component and the infusion tube component through the connecting structure; the filtering box body comprises a first box body and a second box body which are detachably connected. The filter joint has a detachable structure, can be directly applied to the traditional infusion apparatus, and is simple, convenient and quick to detach. The use method in the traditional infusion set comprises the following steps: the original venous duct is cut off, and the filter joint is installed and connected between the cut off parts. Meanwhile, the filter box body adopts a detachable structure, and medical workers can select different filter layers according to different filter requirements.

Description

Filter joint for indwelling venous tubing and method of use
Technical Field
The invention belongs to the technical field of medical instruments, and particularly relates to a filter joint for an indwelling venous pipeline and a using method thereof.
Background
The clinical application of the infusion using the venous indwelling needle is very wide, but the insoluble particles existing in the liquid medicine inevitably enter the human body through the venous infusion, so that an acute reaction or potential danger can be caused, and the harm is serious and lasting.
Patent publication No. CN205729891U discloses a filtering type venous indwelling needle, which comprises a filter fixedly connected between an indwelling needle tube component and an infusion tube component; the filter membrane in the filter is fixedly arranged and cannot be replaced; the whole body is integrated with the remaining needle, and the disposable article is a disposable article with higher use cost. Meanwhile, due to the fixed arrangement of the filter membrane, a proper filter cannot be selected according to requirements (different substances are filtered).
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a filter joint for an indwelling venous pipeline and a using method thereof.
The technical solution of the invention is as follows: the filter joint for indwelling the venous pipeline is connected between the indwelling needle tube component and the infusion tube component and comprises a filter box body and two connecting structures, wherein the two connecting structures are respectively connected to the two ends of the filter box body; a plurality of filter layers are arranged in the filter box body; the filter box body is respectively detachably connected with the indwelling needle tube component and the infusion tube component through connecting structures; the filtering box body comprises a first box body and a second box body which are detachably connected. The filter joint has a detachable structure, can be directly applied to the traditional infusion apparatus, is quick to detach, and can be directly applied to the traditional infusion apparatus to effectively improve the application range. And the filtering box body adopts a detachable structure, so that medical personnel can select and install different filtering layers according to different filtering requirements.
Preferably, the connecting structure comprises a fixing part and a movable buckle; the fixing part is tubular, the inner side of the fixing part is fixedly connected with the filtering box body and is communicated with the inner part of the filtering box body; a radial inward convex part is arranged on the inner side of the outer end part of the fixed part, a conical table top is arranged on the inner wall of the inner end part of the convex part, and the inner diameter of the conical table top is gradually reduced from inside to outside; the outer diameter of the movable buckle is equal to the inner diameter of the convex part, the axial length of the movable buckle is greater than that of the convex part, and the outer wall of the outer end part of the movable buckle is provided with a radially outward outer flange; a plurality of axial plates extending axially are arranged on the inner side of the movable buckle, and the plurality of axial plates form a virtual tubular structure coaxial with the movable buckle; axial slots are arranged between the adjacent axial plates at intervals; the outer wall of the inner side of the axial plate is provided with an inner flange, the outer diameter of the inner flange is larger than the inner diameter of the convex part, and the outer diameter of the inner flange is smaller than the maximum inner diameter of the conical table surface; the inner wall of the inner side of the axial plate is provided with a clamping jaw; when the movable buckle moves outwards, the inner flange is abutted against the conical table surface, and the axial plate is compressed inwards.
The fixing part and the movable buckle of the connecting structure have simple structure and simple and convenient operation, and can be convenient for moving personnel to quickly disassemble and assemble the filter joint.
Preferably, a distraction part is axially arranged in the fixing part, the distraction part is in a conical tube shape, the outer diameter of the outer end of the distraction part is smaller than that of the inner end of the distraction part, and the outer diameter of the outer end of the distraction part is smaller than that of the inner side jaw of the axial plate of the convex part to form the inner diameter of the virtual ring; the inner end of the opening part is fixed on the inner wall of the fixing part, and the outer end of the opening part extends outwards into the movable buckle. When the pipeline is inserted into the movable buckle, the pipeline is sleeved on the outer wall of the opening part, so that the pipeline can be more tightly clamped in the connecting structure.
Preferably, the periphery of the filter layer is provided with a sealing ring, so that the connecting part between the first box body and the second box body is tighter, and the leakage of the liquid medicine is prevented.
Preferably, the filter box body is internally provided with a mounting cavity and an end part isolation cavity; the inner diameter of the end part isolation cavity is smaller than that of the installation cavity; the filter layer is matched with the mounting cavity; an axial convex ring is arranged at the edge of the filter layer. The axial convex ring can form a spacing cavity between adjacent filter layers, so that filtered substances can be stored conveniently, and the filter layers are prevented from being blocked by the filtered substances to influence the infusion speed.
Preferably, a plurality of movable clamping rings are detachably arranged in the mounting cavity; the axial length of the movable snap ring and all the filter layers is equal to the axial length of the mounting cavity. The movable snap ring can be adopted to ensure that the filter layer is stably arranged in the mounting cavity.
Preferably, the filter layer is two or more of a nuclear pore membrane layer, a screen mesh layer, filter paper, a microporous filter membrane layer and a filter sponge. The multiple filter layers cooperate to enhance the filtering effect.
Preferably, a mark is arranged at the connecting part of the filtering box body and one of the connecting structures; the mesh number of the multi-layer filter layers is gradually increased towards the direction of the end part where the mark is located; the connecting structure with the mark is connected with the indwelling needle tube component. The filter layer is arranged in a way that the filtered substances are sequentially filtered from large particles to small particles.
Preferably, the fixing part and the filtering box body are integrally made of stainless steel; the movable buckle is made of plastic materials.
The fixed part and the filtering box body are integrally made of stainless steel, and can be directly applied to the traditional infusion apparatus, so that the application range is effectively improved. The filtering layer which is positioned in the filtering box body and can not be recycled after being used and the movable buckle connected with the fixed part can adopt disposable articles, thereby avoiding cross infection.
The use method of the filter joint of the indwelling venous pipeline comprises the following steps:
and connecting with a pipeline:
a1: inserting the end of the pipeline from the middle of the movable buckle inwards; due to inertia, the inner flange of the movable buckle is positioned at the inner side of the convex part, and the axial plate expands outwards, so that the pipeline quickly passes through the clamping jaws.
A2: the movable buckle is pulled outwards through the outer flange; when the movable buckle moves outwards, the axial plate moves outwards along the frustum surface, the axial plate is gradually folded inwards, and the clamping jaws are slowly embedded into the outer wall of the pipeline, so that the pipeline is tightly installed in the connecting structure.
A3: clamping the inner side of the outer flange by using a clamp spring or other clamping pieces; the clamping pieces such as the snap spring and the like can prevent the movable buckle from moving inwards and release the clamping jaw.
And (3) disassembling the pipeline:
b1: pulling out the snap spring or other clamping parts, and releasing the movable buckle;
b2: pushing the movable buckle inwards;
b3: pulling out the pipeline;
the step of replacing the filter layer in the filter box body is that the filter joint is not connected with the pipeline at the moment:
c1: the first box body and the second box body are disassembled;
c2: taking out all the filter layers and the movable snap rings;
c3: cleaning and disinfecting the first box body and the second box body;
c4: putting a new filter layer into the mounting cavity;
c5: connect first box body, second box body.
Can also comprise the steps of disassembling and assembling the movable buckle: and the new movable buckles are respectively sleeved on the fixing parts connected with the clean and reusable filter box body, and then the new filter layer or the movable clamping ring is installed to form a new and safe usable filter joint.
By adopting the technical scheme, the invention has the beneficial effects that:
1. the filter joint has a detachable structure, and the use method of detaching and using the filter joint is simple, convenient and quick; can also be directly used in the traditional infusion apparatus, thereby effectively improving the application range.
2. The filtering box body adopts a detachable structure, and medical workers can select and install different filtering layers according to different filtering requirements.
3. The fixing part and the movable buckle of the connecting structure have simple structure and simple and convenient operation, and can be convenient for moving personnel to quickly disassemble and assemble the filter joint.
4. The axial convex ring can form a spacing cavity between adjacent filter layers, so that filtered substances can be stored conveniently, and the filter layers are prevented from being blocked by the filtered substances to influence the infusion speed.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a state diagram of the present invention;
FIG. 3 is a schematic view of a connection structure according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of a connection structure according to embodiment 2 of the present invention;
fig. 5 is a schematic structural view of the movable snap ring and the filter layer.
Description of the main reference numerals:
0. a pipeline; 1. an indwelling needle assembly; 2. a transfusion tube assembly; 3. a filter cartridge body; 4. a connecting structure; 5. a filter layer; 6. a first case; 7. a second box body; 8. a fixed part; 9. a movable buckle; 10. a convex portion; 11. a conical table surface; 12. an outer flange; 13. an axial plate; 14. an axial slot; 15. an inner flange; 16. a claw; 17. a distraction section; 18. a seal ring; 19. a mounting cavity; 20. an end isolation chamber; 21. an axial convex ring; 22. a compartment; 23. a movable snap ring; 24. and (5) identifying.
Detailed Description
The invention is further described below with reference to the figures and the specific embodiments.
The directional phrases used in this disclosure include, for example: the directional terms such as up, down, left, right, inner, outer, etc. are used only with reference to the orientation of the attached FIG. 1 of the specification. Accordingly, the directional terminology used is intended to be illustrative only and is not intended to be limiting of the invention.
As shown in fig. 1-3 and 5, the invention discloses a filter joint for an indwelling venous line, which is connected between an indwelling needle tube component 1 and an infusion tube component 2, and comprises a filter box body 3 and two connecting structures 4, wherein the two connecting structures 4 are respectively connected with two ends of the filter box body 3; a plurality of filter layers 6 are arranged in the filter box body 3; the filtering box body 3 is respectively detachably connected with the indwelling needle tube component 1 and the infusion tube component 2 through a connecting structure 4; the filtration cartridge 3 comprises a first cartridge 6 and a second cartridge 7 which are detachably connected. The filter joint has a detachable structure, can be directly applied to the traditional infusion apparatus, and is quick to detach; can also be directly applied to the traditional infusion apparatus, thereby effectively improving the application range. And filter the box body 3 and adopt the detachable construction at the same time, the medical personnel can choose to install different filter layers 5 according to different filtration demands.
The connecting structure 4 comprises a fixed part 8 and a movable buckle 9; the fixing part 8 is tubular, the inner side of the fixing part 8 is fixedly connected with the filtering box body 3 and is communicated with the inside of the filtering box body 3; a radial inward convex part 10 is arranged on the inner side of the outer end part of the fixing part 8, a conical table surface 11 is arranged on the inner wall of the inner end part of the convex part 10, and the inner diameter of the conical table surface 11 is gradually reduced from inside to outside; the outer diameter of the movable buckle 9 is equal to the inner diameter of the convex part 10, the axial length of the movable buckle 9 is greater than that of the convex part 10, and the outer wall of the outer end part of the movable buckle 9 is provided with an outer flange 12 which is outward in the radial direction; the outer flange 12 serves to prevent the movable buckle 9 from being completely embedded in the fixed part 8. A plurality of axial plates 13 extending axially are arranged on the inner side of the movable buckle 9, and the plurality of axial plates 13 form a virtual tubular structure coaxial with the movable buckle 9; axial strip holes 14 are arranged between the adjacent axial plates 13 at intervals; an inner flange 15 is arranged on the outer wall of the inner side of the axial plate 13, the outer diameter of the inner flange 15 is larger than the inner diameter of the convex part 10, and the outer diameter of the inner flange 15 is smaller than the maximum inner diameter of the conical table surface 11; the inner wall of the inner side of the axial plate 13 is provided with a clamping jaw 16; when the movable buckle 9 moves outwards, the inner flange 15 is pressed against the conical table surface 11, and the axial plate 13 is compressed inwards. The fixing portion 8 is integrally formed with the filter cartridge 3.
The fixing part 8 and the movable buckle 9 of the connecting structure 4 have simple structure and simple and convenient operation, and can be convenient for moving personnel to quickly disassemble and assemble the filter joint.
The periphery of the filter layer 5 is provided with a sealing ring 18, so that the connection part between the first box body 6 and the second box body 7 is tighter, and the leakage of the liquid medicine is prevented.
A mounting cavity 19 and an end part isolation cavity 20 are arranged in the filtering box body 3; the inner diameter of the end isolation cavity 20 is smaller than that of the installation cavity 19; the filter layer 5 is matched with the mounting cavity 19; the edge of the filter layer 4 is provided with an axial convex ring 21. The axial convex ring 21 can form a spacing cavity 22 between adjacent filter layers 5, so that filtered substances can be stored conveniently, and the filter layers 5 are prevented from being blocked by the filtered substances to influence the infusion speed.
A plurality of movable snap rings 23 are detachably arranged in the mounting cavity 19; the axial length of the movable clamping ring 23 and all the filter layers 5 is equal to the axial length of the mounting cavity 19. The filter layer 5 can be stably arranged in the installation cavity 19 by adopting the movable clamping ring 23.
The filter layer 5 is two or more of a nuclear pore membrane layer, a sieve layer, filter paper, a microporous filter membrane layer and filter sponge. The plurality of filter layers 5 cooperate to enhance the filtering effect.
A mark 24 is arranged at the connecting part of the filtering box body 3 and one of the connecting structures 4; the mark can be arranged as a sloping platform shown in fig. 1, and can also be a pattern and the like. The mesh number of the multi-layer filter layer 5 is gradually increased towards the end part of the mark 24; the connecting structure 4 provided with the mark 24 is connected with the indwelling needle tube assembly 1. The filter layer 5 is arranged in such a way that the substances to be filtered are filtered sequentially from large particles to small particles.
Example 2
Based on embodiment 1, as shown in fig. 1-2 and fig. 4-5, the invention describes a filter joint for an indwelling venous line, which is connected between an indwelling needle tube assembly 1 and an infusion tube assembly 2, and comprises a filter box body 3 and two connecting structures 4, wherein the two connecting structures 4 are respectively connected to two ends of the filter box body 3; a plurality of filter layers 6 are arranged in the filter box body 3; the filtering box body 3 is respectively detachably connected with the indwelling needle tube component 1 and the infusion tube component 2 through a connecting structure 4; the filtration cartridge 3 comprises a first cartridge 6 and a second cartridge 7 which are detachably connected. The filter joint has a detachable structure, can be directly applied to a traditional infusion apparatus, is quick to detach, can be directly applied to the traditional infusion apparatus, and effectively improves the application range. And filter the box body 3 and adopt the detachable construction at the same time, the medical personnel can choose to install different filter layers 5 according to different filtration demands.
The connecting structure 4 comprises a fixed part 8 and a movable buckle 9; the fixing part 8 is tubular, the inner side of the fixing part 8 is fixedly connected with the filtering box body 3 and is communicated with the inside of the filtering box body 3; a radial inward convex part 10 is arranged on the inner side of the outer end part of the fixing part 8, a conical table surface 11 is arranged on the inner wall of the inner end part of the convex part 10, and the inner diameter of the conical table surface 11 is gradually reduced from inside to outside; the outer diameter of the movable buckle 9 is equal to the inner diameter of the convex part 10, the axial length of the movable buckle 9 is greater than that of the convex part 10, and the outer wall of the outer end part of the movable buckle 9 is provided with an outer flange 12 which is outward in the radial direction; the outer flange 12 serves to prevent the movable buckle 9 from being completely embedded in the fixed part 8. A plurality of axial plates 13 extending axially are arranged on the inner side of the movable buckle 9, and the plurality of axial plates 13 form a virtual tubular structure coaxial with the movable buckle 9; axial strip holes 14 are arranged between the adjacent axial plates 13 at intervals; an inner flange 15 is arranged on the outer wall of the inner side of the axial plate 13, the outer diameter of the inner flange 15 is larger than the inner diameter of the convex part 10, and the outer diameter of the inner flange 15 is smaller than the maximum inner diameter of the conical table surface 11; the inner wall of the inner side of the axial plate 13 is provided with a clamping jaw 16; when the movable buckle 9 moves outwards, the inner flange 15 is pressed against the conical table surface 11, and the axial plate 13 is compressed inwards. The fixing portion 8 is integrally formed with the filter cartridge 3.
The fixing part 8 and the movable buckle 9 of the connecting structure 4 have simple structure and simple and convenient operation, and can be convenient for moving personnel to quickly disassemble and assemble the filter joint.
The fixing part 8 is internally provided with a spreading part 17 along the axial direction, the spreading part 17 is in a conical tubular shape, the outer diameter of the outer end of the spreading part 17 is smaller than that of the inner end of the spreading part, and the outer diameter of the outer end of the spreading part 17 is smaller than the inner diameter of a virtual ring formed by the claws 16 at the inner side of the axial plate 13 of the convex part 10; the inner end of the opening part 17 is fixed on the inner wall of the fixing part 8, and the outer end of the opening part 17 extends outwards to the inside of the movable buckle 9. When the pipeline 0 is inserted into the movable buckle 8, the pipeline 8 is sleeved on the outer wall of the opening part 17, so that the pipeline 0 can be more tightly clamped in the connecting structure 4.
The periphery of the filter layer 5 is provided with a sealing ring 18, so that the connection part between the first box body 6 and the second box body 7 is tighter, and the leakage of the liquid medicine is prevented.
A mounting cavity 19 and an end part isolation cavity 20 are arranged in the filtering box body 3; the inner diameter of the end isolation cavity 20 is smaller than that of the installation cavity 19; the filter layer 5 is matched with the mounting cavity 19; the edge of the filter layer 4 is provided with an axial convex ring 21. The axial convex ring 21 can form a spacing cavity 22 between adjacent filter layers 5, so that filtered substances can be stored conveniently, and the filter layers 5 are prevented from being blocked by the filtered substances to influence the infusion speed.
A plurality of movable snap rings 23 are detachably arranged in the mounting cavity 19; the axial length of the movable clamping ring 23 and all the filter layers 5 is equal to the axial length of the mounting cavity 19. The filter layer 5 can be stably arranged in the installation cavity 19 by adopting the movable clamping ring 23.
The filter layer 5 is two or more of a nuclear pore membrane layer, a sieve layer, filter paper, a microporous filter membrane layer and filter sponge. The plurality of filter layers 5 cooperate to enhance the filtering effect.
A mark 24 is arranged at the connecting part of the filtering box body 3 and one of the connecting structures 4; the mark can be arranged as a sloping platform shown in fig. 1, and can also be a pattern and the like. The mesh number of the multi-layer filter layer 5 is gradually increased towards the end part of the mark 24; the connecting structure 4 provided with the mark 24 is connected with the indwelling needle tube assembly 1. The filter layer 5 is arranged in such a way that the substances to be filtered are filtered sequentially from large particles to small particles.
Example 3
Based on embodiment 1 or embodiment 2, as shown in fig. 1-5, the fixing part and the filter cartridge body are made of stainless steel integrally; the movable buckle is made of plastic materials.
The fixing part 8 and the filtering box body 3 are integrally made of stainless steel, and can be directly applied to a traditional infusion apparatus, so that the application range is effectively enlarged. The filtering layer 5 which is positioned in the filtering box body 3 and can not be recycled after being used and the movable buckle 9 connected with the fixed part 8 can adopt disposable articles, thereby avoiding cross infection.
Example 4
Based on embodiments 1-3, a method for using a filtering connector of an indwelling venous line comprises the following steps:
and connecting with a pipeline:
a1: inserting the end of the pipeline from the middle of the movable buckle inwards; due to inertia, the inner flange of the movable buckle is positioned at the inner side of the convex part, and the axial plate expands outwards, so that the pipeline quickly passes through the clamping jaws.
A2: the movable buckle is pulled outwards through the outer flange; when the movable buckle moves outwards, the axial plate moves outwards along the frustum surface, the axial plate is gradually folded inwards, and the clamping jaws are slowly embedded into the outer wall of the pipeline, so that the pipeline is tightly installed in the connecting structure.
A3: clamping the inner side of the outer flange by using a clamp spring or other clamping pieces; the clamping pieces such as the snap spring and the like can prevent the movable buckle from moving inwards and release the clamping jaw.
If the invention is applied to the traditional infusion set, before the step of connecting the infusion set with the pipeline, the operation steps are added: cutting off the pipeline (preferably close to the rear end of the indwelling needle tube component) of the traditional infusion set by using sharp devices such as scissors; then the two pipe ends of the cut part are respectively connected and installed on the two connecting structures of the filtering structure.
And (3) disassembling the pipeline:
b1: pulling out the snap spring or other clamping parts, and releasing the movable buckle;
b2: pushing the movable buckle inwards;
b3: pulling out the pipeline;
the step of replacing the filter layer in the filter box body is that the filter joint is not connected with the pipeline at the moment:
c1: the first box body and the second box body are disassembled;
c2: taking out all the filter layers and the movable snap rings;
c3: cleaning and disinfecting the first box body and the second box body;
c4: putting a new filter layer into the mounting cavity;
c5: connect first box body, second box body.
The method also comprises the following operation steps of disassembling and assembling the movable buckle: and the new movable buckles are respectively sleeved on the fixing parts connected with the clean and reusable filter box body, and then the new filter layer or the movable clamping ring is installed to form a new and safe usable filter joint.
Finally, the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and other modifications or equivalent substitutions made by the technical solutions of the present invention by those of ordinary skill in the art should be covered within the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solutions of the present invention.

Claims (10)

1. A filter joint for remaining venous line connects between lieing in needle tubing subassembly and infusion tube subassembly, its characterized in that: comprises a filtering box body and two connecting structures, wherein the two connecting structures are respectively connected with the two ends of the filtering box body; a plurality of filter layers are arranged in the filter box body; the filter box body is respectively detachably connected with the indwelling needle tube component and the infusion tube component through connecting structures; the filtering box body comprises a first box body and a second box body which are detachably connected.
2. The filtering connector for indwelling intravenous tubing of claim 1, wherein: the connecting structure comprises a fixing part and a movable buckle; the fixing part is tubular, the inner side of the fixing part is fixedly connected with the filtering box body and is communicated with the inner part of the filtering box body; a radial inward convex part is arranged on the inner side of the outer end part of the fixed part, a conical table top is arranged on the inner wall of the inner end part of the convex part, and the inner diameter of the conical table top is gradually reduced from inside to outside; the outer diameter of the movable buckle is equal to the inner diameter of the convex part, the axial length of the movable buckle is greater than that of the convex part, and the outer wall of the outer end part of the movable buckle is provided with a radially outward outer flange; a plurality of axial plates extending axially are arranged on the inner side of the movable buckle, and the plurality of axial plates form a virtual tubular structure coaxial with the movable buckle; axial slots are arranged between the adjacent axial plates at intervals; the outer wall of the inner side of the axial plate is provided with an inner flange, the outer diameter of the inner flange is larger than the inner diameter of the convex part, and the outer diameter of the inner flange is smaller than the maximum inner diameter of the conical table surface; the inner wall of the inner side of the axial plate is provided with a clamping jaw; when the movable buckle moves outwards, the inner flange is abutted against the conical table surface, and the axial plate is compressed inwards.
3. The filtering connector for indwelling intravenous tubing of claim 2, wherein: the fixing part is internally provided with a spreading part along the axial direction, the spreading part is in a conical tube shape, the outer diameter of the outer end of the spreading part is smaller than that of the inner end of the spreading part, and the outer diameter of the outer end of the spreading part is smaller than that of the inner side of the axial plate of the convex part to form the inner diameter of a virtual ring; the inner end of the opening part is fixed on the inner wall of the fixing part, and the outer end of the opening part extends outwards into the movable buckle.
4. The filtering connector for indwelling intravenous tubing of claim 1, wherein: and a sealing ring is arranged on the periphery of the filtering layer.
5. The filtering connector for indwelling intravenous tubing of claim 1, wherein: the filter box body is internally provided with an installation cavity and an end part isolation cavity; the inner diameter of the end part isolation cavity is smaller than that of the installation cavity; the filter layer is matched with the mounting cavity; an axial convex ring is arranged at the edge of the filter layer.
6. The filtering connector for an indwelling venous line as claimed in claim 4, wherein: a plurality of movable clamping rings are detachably arranged in the mounting cavity; the axial length of the movable snap ring and all the filter layers is equal to the axial length of the mounting cavity.
7. The filtering connector for indwelling intravenous tubing of claim 1, wherein: the filtering layer is two or more than two of a nuclear pore membrane layer, a sieve layer, filter paper, a microporous filtering membrane layer and a filtering sponge.
8. The filtering connector for indwelling intravenous tubing of claim 1, wherein: the part of the filtering box body connected with one of the connecting structures is provided with a mark; the mesh number of the multi-layer filter layers is gradually increased towards the direction of the end part where the mark is located; the connecting structure with the mark is connected with the indwelling needle tube component.
9. The filtering connector for indwelling intravenous tubing of claim 2, wherein: the fixed part and the filtering box body are integrally made of stainless steel; the movable buckle is made of plastic materials.
10. A method of using the filter adapter of an indwelling venous line as claimed in any one of claims 2 to 9, wherein: the method comprises the following steps:
and connecting with a pipeline:
a1: inserting the end of the pipeline from the middle of the movable buckle inwards;
a2: the movable buckle is pulled outwards through the outer flange;
a3: clamping the inner side of the outer flange by using a clamp spring or other clamping pieces;
and (3) disassembling the pipeline:
b1: pulling out the snap spring or other clamping parts, and releasing the movable buckle;
b2: pushing the movable buckle inwards;
b3: pulling out the pipeline;
the replacement of the filtering layer in the filtering box body comprises the following steps:
c1: the first box body and the second box body are disassembled;
c2: taking out all the filter layers and the movable snap rings;
c3: cleaning and disinfecting the first box body and the second box body;
c4: putting a new filter layer into the mounting cavity;
c5: connect first box body, second box body.
CN202010007782.7A 2020-01-05 2020-01-05 Filter joint for indwelling venous tubing and method of use Pending CN111111001A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010007782.7A CN111111001A (en) 2020-01-05 2020-01-05 Filter joint for indwelling venous tubing and method of use

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010007782.7A CN111111001A (en) 2020-01-05 2020-01-05 Filter joint for indwelling venous tubing and method of use

Publications (1)

Publication Number Publication Date
CN111111001A true CN111111001A (en) 2020-05-08

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010007782.7A Pending CN111111001A (en) 2020-01-05 2020-01-05 Filter joint for indwelling venous tubing and method of use

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Country Link
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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB667933A (en) * 1949-06-11 1952-03-12 Leo Rane Filter
CN205729891U (en) * 2016-04-05 2016-11-30 薛珊 Filtering type venous detaining needle
US20180169397A1 (en) * 2014-05-08 2018-06-21 Sicos Gmbh Connecting device for a catheter, in particular a peripheral vein catheter
CN208319637U (en) * 2017-08-07 2019-01-04 广东省人民医院(广东省医学科学院) Heart contrast injector

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB667933A (en) * 1949-06-11 1952-03-12 Leo Rane Filter
US20180169397A1 (en) * 2014-05-08 2018-06-21 Sicos Gmbh Connecting device for a catheter, in particular a peripheral vein catheter
CN205729891U (en) * 2016-04-05 2016-11-30 薛珊 Filtering type venous detaining needle
CN208319637U (en) * 2017-08-07 2019-01-04 广东省人民医院(广东省医学科学院) Heart contrast injector

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