CN115068741B - Anti-backflow anti-needling indwelling needle - Google Patents
Anti-backflow anti-needling indwelling needle Download PDFInfo
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- CN115068741B CN115068741B CN202210730117.XA CN202210730117A CN115068741B CN 115068741 B CN115068741 B CN 115068741B CN 202210730117 A CN202210730117 A CN 202210730117A CN 115068741 B CN115068741 B CN 115068741B
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- seat
- catheter
- needle tube
- assembly
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- 230000000151 anti-reflux effect Effects 0.000 claims abstract description 11
- 239000012528 membrane Substances 0.000 claims description 19
- 208000012266 Needlestick injury Diseases 0.000 claims description 11
- 239000013013 elastic material Substances 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 5
- 244000241796 Christia obcordata Species 0.000 claims description 3
- 238000001467 acupuncture Methods 0.000 claims 1
- 230000002265 prevention Effects 0.000 abstract description 5
- 238000004080 punching Methods 0.000 abstract description 4
- 230000009977 dual effect Effects 0.000 abstract description 3
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 8
- 239000003814 drug Substances 0.000 description 7
- 239000008280 blood Substances 0.000 description 4
- 210000004369 blood Anatomy 0.000 description 4
- 230000035515 penetration Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 210000003462 vein Anatomy 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 210000001124 body fluid Anatomy 0.000 description 2
- 239000010839 body fluid Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003146 anticoagulant agent Substances 0.000 description 1
- 229940127219 anticoagulant drug Drugs 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 239000011505 plaster Substances 0.000 description 1
- 239000007779 soft material Substances 0.000 description 1
Classifications
-
- 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
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
-
- 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
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
-
- 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
- A61M5/158—Needles for infusions; Accessories therefor, e.g. for inserting infusion needles, or for holding them on the body
- A61M2005/1583—Needle extractors
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Vascular Medicine (AREA)
- Pulmonology (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention discloses an anti-reflux and anti-needling indwelling needle, which comprises a needle tube component and a catheter component, wherein the needle tube component comprises a needle tube seat and a needle tube, the catheter component comprises a catheter seat and a catheter, the needle tube is arranged in the catheter in a penetrating way, the needle tube component and the catheter component are detachably connected through a connecting component, the connecting component comprises a connecting seat and a connecting piece, the connecting seat is connected with the needle tube seat in an improved way, the front end of the connecting seat is fixedly connected with the inner wall of the catheter seat through an elastic valve, and the axis of the elastic valve is provided with a contractible elastic opening; the connecting piece slides and sets up in the connecting seat, and the front end accessible axial displacement of connecting piece drives the switching of elasticity opening, and the coaxial embedment of connecting piece has a needle-punching prevention subassembly. According to the invention, the needle tube assembly and the catheter assembly are connected through the connecting assembly, and the movable connecting piece in the connecting assembly is matched with the anti-needling assembly, so that the action of pulling out the needle tube can simultaneously achieve the dual functions of preventing countercurrent and needling, thereby improving the use efficiency and ensuring the use safety.
Description
Technical Field
The invention relates to the technical field of medical instruments, in particular to an anti-backflow anti-needling indwelling needle.
Background
The indwelling needle is a clinically common infusion tool at present and consists of a catheter assembly and a needle tube assembly. When in clinical use, the needle head protective cap is taken down, and the puncture needle is carried with the catheter to synchronously enter the vein of the human body. After blood return, success of venipuncture is confirmed, the puncture needle is withdrawn, and only the catheter made of soft material is reserved in the vein. The liquid medicine is infused into the human body through the soft catheter, and the catheter is matched with the blood anticoagulant for use, so that the liquid medicine can be used for multiple infusions within the safe retention time of the vein of the human body, and the pain of patients caused by frequent puncture is avoided.
In practical use, when the remaining puncture needle is pulled out, some mixed body fluids such as blood, liquid medicine and the like are inevitably carried out, and in the nursing of some special patients, the body fluids have the safety risk of infection transmission. In addition, after the puncture needle is pulled out, the puncture needle is directly exposed, and medical staff or patients are easy to puncture without paying attention, so that secondary injury is caused, and the puncture needle has a large safety risk. Therefore, how to improve the safe use of the indwelling needle is a problem that is urgently needed to be solved at present.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an anti-backflow and anti-needling indwelling needle.
The aim of the invention is achieved by the following technical scheme:
the anti-backflow and anti-needling indwelling needle comprises a needle tube assembly and a catheter assembly, wherein the needle tube assembly comprises a needle tube seat and a needle tube fixedly arranged at the front end of the needle tube seat, the catheter assembly comprises a catheter seat and a catheter fixedly arranged at the front end of the catheter seat, the needle tube is arranged in the catheter in a penetrating manner, the needle tube assembly and the catheter assembly are detachably connected through a connecting assembly, the connecting assembly comprises a connecting seat and a connecting piece, the connecting seat is fixedly arranged in the catheter seat, the needle tube seat is connected to the tail end of the connecting seat, the front end of the connecting seat is fixedly connected with the inner wall of the catheter seat through an elastic valve, and the axis of the elastic valve is provided with a contractible elastic opening; the connecting piece is arranged in the connecting seat in a sliding way, the connecting piece comprises a conical head part with a hollow inside and connecting arms respectively arranged at two sides of the conical head part, the front end of the connecting piece can drive the elastic opening to open and close through axial movement, the connecting piece is coaxially internally provided with an anti-needling component, the needle tube component is connected with the catheter component in an initial state, and the needle tube sequentially penetrates through the anti-needling component, the connecting piece, the elastic opening and the catheter; in the second state, the needle tube component and the catheter component are separated, the needle point of the needle tube moves into the anti-needling component, the anti-needling component is separated from the connecting piece through backward movement, and meanwhile, the connecting piece is driven by the anti-needling component to move backward and separate from the elastic valve, so that the elastic opening is closed to seal the catheter seat.
Preferably, the elastic valve is provided with an elastic membrane surface, a group of cuts are formed on the outer edge of the elastic membrane surface along the direction of the axis of the elastic membrane surface, and the cuts intersect at the axis of the elastic valve to form the elastic opening.
Preferably, a group of extension arms connected with the elastic membrane surface extend from the outer edge of the elastic valve to the axis of the elastic valve, and intervals are formed between two ends of the extension arms, and each elastic membrane surface in each interval is provided with one notch.
Preferably, a sliding groove matched with the connecting arm is formed in the inner wall of the connecting seat, and the connecting arm axially moves in the sliding groove.
Preferably, the anti-needling assembly is arranged between the two connecting arms, a stop block is arranged at the tail end of the inner side surface of each connecting arm, and in the initial state, the stop block is abutted with the tail end of the anti-needling assembly; in the second state, the stop is separated from the anti-needle-stick assembly.
Preferably, the anti-needling assembly comprises a housing and a shrapnel, wherein a groove is formed in the housing, the shrapnel comprises a first end and a second end which are connected through a straight middle part, the first end is bent and clamped at the tail end of the groove, the second end is bent to form a hook shape, a convex part is arranged on the outer wall of the needle tube, a perforation with the diameter smaller than that of the convex part is arranged at the tail end of the groove, the length between the convex part and the needle point of the needle tube is smaller than the distance between the second end and the perforation, so that when the convex part is abutted with the perforation, the second end is separated from the needle tube and is abutted with the inner wall of the groove under the driving of the middle part to form a closed space, and the needle point of the needle tube is closed in the closed space.
Preferably, the shell is made of elastic materials, the diameter of the shell is larger than the distance between the two stop blocks in a normal state, and the diameter of the shell after deformation is smaller than the distance between the two stop blocks.
Preferably, the outer wall of the tail end of the connecting seat is provided with a bayonet, the front end of the needle tube seat is provided with an inserting block matched with the bayonet, and in the initial state, the inserting block is inserted into the bayonet.
Preferably, the outer wall of the needle tube seat is concave, and anti-slip ribs are uniformly distributed on the concave outer wall.
Preferably, the two sides of the catheter seat are provided with butterfly wings, and a protective shell matched with the catheter seat is sleeved outside the catheter seat.
The beneficial effects of the invention are mainly as follows:
1. the needle tube assembly and the catheter assembly are detachably connected through the connecting assembly, the movable connecting piece in the connecting assembly is matched with the needle penetration preventing assembly, so that the needle tip is sealed by the needle penetration preventing assembly in the needle tube extraction process, the aim of preventing the needle tip of the needle tube from being exposed is achieved, meanwhile, the needle penetration preventing assembly is driven to drive the connecting piece to move backwards and separate from the elastic valve, the elastic valve seals the elastic opening of the axle center of the elastic valve to seal the catheter seat, the aim of preventing liquid medicine from flowing backwards is achieved, the dual functions of preventing backflow and preventing needle penetration are achieved through one action of extracting the needle tube, other steps are not needed, convenience and high efficiency of use are improved, safety in use is guaranteed, and reality of fitting is achieved;
2. the surface of the elastic valve is provided with the extension arm, so that the resilience force of the elastic membrane surface of the elastic valve can be enhanced, and the resilience closure of the elastic opening of the axial center of the elastic valve after the needle tube is pulled out is ensured;
3. the shell in the anti-needling assembly is made of elastic materials, so that the shell can be abutted against the stop blocks in a normal state, the connecting piece is pulled to move backwards, and the shell can deform and be separated from the stop blocks after the pulling force is increased, so that separation is completed;
4. the first end of the elastic sheet of the needle-punching prevention component is arranged in the shell through the bending clamp, so that the middle part has elastic force close to the axis of the shell, after the needle point of the needle tube moves into the second end, the second end is driven to be abutted with the shell, the needle point of the needle tube is sealed, the needle point is prevented from being punched out secondarily, and the aim of needle-punching prevention is achieved.
Drawings
The technical scheme of the invention is further described below with reference to the accompanying drawings:
fig. 1: schematic diagrams of embodiments of the present invention;
fig. 2: the embodiment of the invention removes the figure of the protective housing;
fig. 3: a cross-sectional view of an embodiment of the present invention in an initial state;
fig. 4: a cross-sectional view of an embodiment of the present invention in a second state;
fig. 5: schematic diagram of an anti-needling assembly in an initial state in the embodiment of the invention;
fig. 6: schematic illustration of an anti-needling assembly in a second state in an embodiment of the present invention;
fig. 7: schematic diagram of elastic valve in the embodiment of the invention;
fig. 8: schematic of the elastic valve being ejected in the embodiment of the invention.
Detailed Description
The present invention will be described in detail below with reference to specific embodiments shown in the drawings. The embodiments are not limited to the present invention, and structural, methodological, or functional modifications of the invention from those skilled in the art are included within the scope of the invention.
In the description of the embodiments, it should be noted that the positional or positional relationship indicated by the terms such as "center", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", etc. are based on the positional or positional relationship shown in the drawings, are merely for convenience of description and simplification of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in the specific orientation, and thus are not to be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. In the description of the scheme, the direction approaching the operator is the near end, and the direction separating from the operator is the far end, with reference to the operator.
As shown in fig. 1 to 8, the invention discloses an anti-reflux and anti-needling indwelling needle, which comprises a needle tube assembly and a catheter assembly, wherein the needle tube assembly comprises a needle tube seat 1 and a needle tube 2 fixedly arranged at the front end of the needle tube seat 1, the catheter assembly comprises a catheter seat 3 and a catheter 4 fixedly arranged at the front end of the catheter seat 3, the needle tube 2 penetrates through the catheter 4, the needle tube assembly and the catheter assembly are detachably connected through a connecting assembly, the connecting assembly comprises a connecting seat 5 and a connecting piece 6, the connecting seat 5 is fixedly arranged in the catheter seat 3, the needle tube seat 1 is connected with the tail end of the connecting seat 5, the front end of the connecting seat 5 is fixedly connected with the inner wall of the catheter seat 3 through an elastic valve 7, and the axis of the elastic valve 7 is provided with a contractible elastic opening 701; the connecting piece 6 is slidably arranged in the connecting seat 5, the front end of the connecting piece 6 can drive the elastic opening 701 to open and close through axial movement, the connecting piece 6 is coaxially internally provided with an anti-needling assembly, in an initial state, the needle tube assembly is connected with the catheter assembly, and the needle tube 2 sequentially penetrates through the anti-needling assembly, the connecting piece 6, the elastic opening 701 and the catheter 4; in the second state, the needle tube assembly and the catheter assembly are separated, the needle tip of the needle tube 2 moves into the anti-needling assembly, the anti-needling assembly is separated from the connecting piece 6 through backward movement, and meanwhile, the connecting piece 6 is driven by the anti-needling assembly to move backward and separate from the elastic valve 7, so that the elastic opening 701 is closed to seal the catheter seat 3.
According to the invention, the needle tube assembly and the catheter assembly are detachably connected by the connecting assembly, and the movable connecting piece 6 in the connecting assembly is matched with the anti-needling assembly, so that the needle point is sealed by the anti-needling assembly in the process of extracting the needle tube 2, and the aim of avoiding the needle point of the needle tube 2 from being exposed is fulfilled; meanwhile, on the other hand, the anti-needling assembly is driven to drive the connecting piece 6 to move backwards and separate from the elastic valve 7, so that the elastic valve 7 seals the elastic opening 701 in the axis of the elastic valve to seal the catheter seat 3, the purpose of preventing the backflow of liquid medicine is achieved, the dual purpose of preventing backflow and needling is achieved through the action of pulling out the needle tube, other steps are not needed, the convenience and the high efficiency of use are improved, the use safety is guaranteed, and the device is fit with reality.
As shown in fig. 3, 7 and 8, the elastic valve 7 has an elastic membrane surface 702, and a set of cuts are formed on the outer edge of the elastic membrane surface 702 and extend toward the axis of the elastic membrane surface 702, and the cuts intersect at the axis of the elastic valve 7 to form the elastic opening 701. The arrangement of the notch enables the elastic opening 701 to shrink to form a complete membrane surface when no force is applied to squeeze, so as to seal the catheter seat 3 and avoid liquid in the catheter seat 3 from overflowing; when pressed by an external force, the elastic opening 701 is recessed inward to be opened, and the liquid medicine is introduced. The elastic membrane 702 is made of elastic material, such as silica gel.
Further, a group of extension arms 703 connected to the elastic membrane surface 701 extend from the outer edge of the elastic valve 7 toward the axis thereof, and the end portions of the extension arms 703 form a space between each two, and each elastic membrane surface 701 in the space has one of the cuts. In the preferred embodiment, three extension arms 703 are provided, and three corresponding cuts are provided, and in other possible embodiments, the number of extension arms 703 and cuts corresponds, and the specific number depends on the actual diameter of the elastic valve 7. The arrangement of the extension arm 702 can strengthen the resilience force of the elastic membrane surface 701, and ensure that the elastic opening 701 at the axle center can rebound in time to be closed after the needle tube 2 is pulled out.
As shown in fig. 3, the connecting piece 6 includes a conical head 601 with a hollow interior and connecting arms 602 disposed on two sides of the conical head 601, a sliding groove 501 matching with the connecting arms 602 is disposed on an inner wall of the connecting seat 5, and the connecting arms 602 axially move in the sliding groove 501. The tapered structure of the tapered head 601 may reduce the contact area between the tapered head and the elastic valve 7, so as to open the elastic opening 701, and the tapered inner wall may limit the anti-needling assembly or other connectors connected thereto.
Further, the anti-needling assembly is disposed between the two connecting arms 602, a stop block 603 is disposed at the tail end of the inner side surface of the connecting arm 602, and in the initial state, the stop block 603 abuts against the tail end of the anti-needling assembly; in the second state, the stop 603 is separated from the anti-needle-stick assembly. The stop block 603 is arranged to enable the rearward movement of the needle-punching prevention assembly to drive the connecting piece 6 to move rearward synchronously, so that the connecting piece 6 is separated from the elastic valve 7 in time, and after the needle tube 2 is withdrawn, the elastic opening 701 can be contracted and closed by a vertical horse to seal the catheter seat 3, so that the liquid medicine or blood is prevented from overflowing or flowing reversely along with the needle tube 2. In addition, as shown in fig. 8, when the catheter 4 is used after penetrating into a human body, the connector 5 is connected to a luer connector, and the luer connector abuts against the stopper 603 to drive the connector 6 to move forward to push up the elastic opening 701, thereby performing infusion.
As shown in fig. 3-6, the anti-needling assembly includes a housing 8 and a spring plate 9, the housing 8 has a groove 801, the spring plate 9 includes a first end 901 and a second end 902 connected by a straight middle portion 903, the first end 901 is bent and clamped at the tail end of the groove 801, and the second end 902 is bent to form a hook shape. The arrangement is such that the intermediate portion 903 has a spring force approaching the axis of the housing 8 to drive the second end 902 into abutment with the recess 801 after the needle tip of the needle cannula 2 has moved into the second end 902.
The outer wall of the needle tube 2 is provided with a convex part 201, the tail end of the groove 801 is provided with a perforation with a diameter smaller than that of the convex part 201, and the length between the convex part 201 and the needle tip of the needle tube 2 is smaller than the distance between the second end 902 and the perforation, so that when the convex part 201 is abutted with the perforation, the second end 902 is separated from the needle tube 2 and is abutted with the inner wall of the groove 801 to form a closed space 100 under the driving of the middle part 903, and the needle tip of the needle tube 2 is closed in the closed space 100. The structure enables the needle tube 2 to be located in the closed space 100, and the protrusion 201 can drive the needle-penetration-preventing assembly to move synchronously along with the needle tube 2 after abutting against the through hole.
In order to further improve the fit between the second end 902 and the housing 8, the front end of the groove 801 is further concave, the second end 902 abuts against the concave of the groove 801, the needle tube 2 abuts against the inner wall of the groove 801, and after the second end 902 abuts against the groove 801, the needle tip of the needle tube 2 can be effectively prevented from being pricked again, and the second end 902 can be located in the groove 801 as much as possible, and does not protrude outside the housing 8, so that the whole needle-pricking prevention assembly can be conveniently pulled out subsequently.
The housing 8 is made of an elastic material, such as silica gel. The elastic material makes the diameter of the shell 8 be larger than the interval between the two stop blocks 603 in the normal state, so as to be abutted with the stop blocks 603, and drive the connecting piece 6 to synchronously move backwards; after the housing 8 further receives the pulling force of the backward movement, it is deformed, and the diameter of the deformed housing is smaller than the distance between the two stoppers 603, so as to separate from the connecting member 6, thereby completing the separation from the connecting member 6.
As shown in fig. 1 and 2, the outer wall of the tail end of the connecting seat 5 is provided with a bayonet 502, the front end of the needle tube seat 1 is provided with a plug 101 matched with the bayonet 502, and in the initial state, the plug 101 is inserted into the bayonet 502. So that the connection between the connection holder 5 and the needle tube holder 1 is effective and the rotation of the needle tube holder 1 relative to the connection holder 5 is prevented.
The outer wall of the needle tube seat 1 is concave, and anti-slip ribs 102 are uniformly distributed on the concave outer wall, so that the needle tube seat is convenient to hold and apply pulling force, and is convenient to use in practice.
The two sides of the catheter seat 3 are provided with the butterfly wings 301 to increase the contact area between the catheter seat 3 and the skin of a patient, leave a pasting space for the adhesive plaster, improve the adaptability between the catheter seat 3 and the patient, and reduce the rotation of the catheter seat 3.
The outside of the catheter seat 3 is also sleeved with a matched protective shell 10 to ensure the integrity and the cleanliness of the indwelling needle before use.
It should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is for clarity only, and that the skilled artisan should recognize that the embodiments may be combined as appropriate to form other embodiments that will be understood by those skilled in the art.
The above list of detailed descriptions is only specific to practical embodiments of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent embodiments or modifications that do not depart from the spirit of the present invention should be included in the scope of the present invention.
Claims (10)
1. Prevent against current and prevent acupuncture needle of keeping somewhere, including needle tubing set spare and pipe subassembly, the needle tubing set spare include needle tube seat (1) with set firmly in needle tubing (2) of needle tube seat (1) front end, the pipe subassembly include pipe seat (3) with set firmly in pipe (4) of pipe seat (3) front end, needle tubing (2) wear to locate in pipe (4), its characterized in that: the needle tube assembly is detachably connected with the catheter assembly through the connecting assembly, the connecting assembly comprises a connecting seat (5) and a connecting piece (6), the connecting seat (5) is fixedly arranged in the catheter seat (3), the needle tube seat (1) is connected to the tail end of the connecting seat (5), the front end of the connecting seat (5) is fixedly connected with the inner wall of the catheter seat (3) through an elastic valve (7), and the axle center of the elastic valve (7) is provided with a contractible elastic opening (701); the connecting piece (6) is arranged in the connecting seat (5) in a sliding manner, the connecting piece (6) comprises a conical head part (601) with a hollow inside and connecting arms (602) respectively arranged at two sides of the conical head part (601), the front end of the connecting piece (6) can drive the elastic opening (701) to be opened and closed through axial movement, the connecting piece (6) is coaxially internally provided with an anti-needling assembly, the needle tube assembly is connected with the catheter assembly in an initial state, and the needle tube (2) sequentially penetrates through the anti-needling assembly, the connecting piece (6), the elastic opening (701) and the catheter (4); in the second state, the needle tube component and the catheter component are separated, the needle tip of the needle tube (2) moves into the anti-needling component, the anti-needling component is separated from the connecting piece (6) through backward movement, and meanwhile, the connecting piece (6) is driven by the anti-needling component to move backward and separate from the elastic valve (7), so that the elastic opening (701) is closed to seal the catheter seat (3).
2. The anti-reflux anti-needle stick needle as recited in claim 1, wherein: the elastic valve (7) is provided with an elastic membrane surface (702), a group of cuts are formed on the outer edge of the elastic membrane surface (702) along the direction of the axis of the elastic membrane surface, and the cuts intersect at the axis of the elastic valve (7) to form the elastic opening (701).
3. The anti-reflux anti-needle stick needle as recited in claim 2, wherein: the outer edge of the elastic valve (7) extends towards the axis of the elastic valve to form a group of extension arms (703) connected with the elastic membrane surface (702), the end parts of the extension arms (703) form intervals between each two, and each elastic membrane surface (702) in each interval is provided with a notch.
4. The anti-reflux anti-needle stick needle as recited in claim 1, wherein: the inner wall of the connecting seat (5) is provided with a chute (501) matched with the connecting arm (602), and the connecting arm (602) axially moves in the chute (501).
5. The anti-reflux anti-needle stick needle as recited in claim 4, wherein: the anti-needling assembly is arranged between the two connecting arms (602), a stop block (603) is arranged at the tail end of the inner side surface of each connecting arm (602), and in the initial state, the stop block (603) is abutted with the tail end of the anti-needling assembly; in the second state, the stop (603) is separated from the anti-needling assembly.
6. The anti-reflux anti-needle stick needle as recited in claim 5, wherein: the anti-needling assembly comprises a shell (8) and a shrapnel (9), wherein a groove (801) is formed in the shell (8), the shrapnel (9) comprises a first end (901) and a second end (902) which are connected through a straight middle part (903), the first end (901) is bent and clamped at the tail end of the groove (801), the second end (902) is bent to form a hook shape, the outer wall of the needle tube (2) is provided with a convex part (201), the tail end of the groove (801) is provided with a perforation with a diameter smaller than that of the convex part (201), the length between the convex part (201) and the needle tip of the needle tube (2) is smaller than the distance between the second end (902) and the perforation, so that when the convex part (201) is abutted with the perforation, the second end (902) is separated from the needle tube (2) and abutted with the inner wall of the groove (801) under the driving of the middle part (903) to form a closed space (100), and the length between the needle tip (201) and the needle tip of the needle tube (2) is in the closed space (100).
7. The anti-reflux anti-needle stick needle as recited in claim 6, wherein: the shell (8) is made of elastic materials, the diameter of the shell is larger than the distance between the two stop blocks (603) in a normal state, and the diameter of the shell after deformation is smaller than the distance between the two stop blocks (603).
8. The anti-reflux anti-needle stick needle as recited in claim 1, wherein: the outer wall of the tail end of the connecting seat (5) is provided with a bayonet (502), the front end of the needle tube seat (1) is provided with an inserting block (101) matched with the bayonet (502), and in the initial state, the inserting block (101) is inserted into the bayonet (502).
9. The anti-reflux anti-needle stick needle as recited in claim 8, wherein: the outer wall of the needle tube seat (1) is concave, and anti-slip ribs (102) are uniformly distributed on the concave outer wall.
10. The anti-reflux anti-needle stick needle as recited in claim 1, wherein: the two sides of the catheter seat (3) are provided with butterfly wings (301), and a protective shell (10) matched with the catheter seat (3) is sleeved outside the catheter seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210730117.XA CN115068741B (en) | 2022-06-24 | 2022-06-24 | Anti-backflow anti-needling indwelling needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210730117.XA CN115068741B (en) | 2022-06-24 | 2022-06-24 | Anti-backflow anti-needling indwelling needle |
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| Publication Number | Publication Date |
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| CN115068741A CN115068741A (en) | 2022-09-20 |
| CN115068741B true CN115068741B (en) | 2024-01-12 |
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| CN202210730117.XA Active CN115068741B (en) | 2022-06-24 | 2022-06-24 | Anti-backflow anti-needling indwelling needle |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN116899047B (en) * | 2023-08-04 | 2024-04-26 | 江苏采纳医疗科技有限公司 | Remaining needle |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201257220Y (en) * | 2008-08-28 | 2009-06-17 | 江西三鑫医疗器械集团有限公司 | Back flow prevention retention needle |
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| WO2017051801A1 (en) * | 2015-09-24 | 2017-03-30 | テルモ株式会社 | Catheter assembly |
| WO2020111485A1 (en) * | 2018-11-26 | 2020-06-04 | (주)메디퍼스트 | Catheter hub and catheter for preventing blood backflow |
| WO2022027261A1 (en) * | 2020-08-05 | 2022-02-10 | 江苏采纳医疗科技有限公司 | Anti-backflow indwelling needle |
-
2022
- 2022-06-24 CN CN202210730117.XA patent/CN115068741B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201257220Y (en) * | 2008-08-28 | 2009-06-17 | 江西三鑫医疗器械集团有限公司 | Back flow prevention retention needle |
| CN103285450A (en) * | 2013-03-25 | 2013-09-11 | 南通恒泰医疗器材有限公司 | Multifunctional indwelling needle |
| WO2017051801A1 (en) * | 2015-09-24 | 2017-03-30 | テルモ株式会社 | Catheter assembly |
| WO2020111485A1 (en) * | 2018-11-26 | 2020-06-04 | (주)메디퍼스트 | Catheter hub and catheter for preventing blood backflow |
| WO2022027261A1 (en) * | 2020-08-05 | 2022-02-10 | 江苏采纳医疗科技有限公司 | Anti-backflow indwelling needle |
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| CN115068741A (en) | 2022-09-20 |
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