CN215386540U

CN215386540U - Disposable anti-backflow venous indwelling needle

Info

Publication number: CN215386540U
Application number: CN202120606086.8U
Authority: CN
Inventors: 李圆章; 黄小茜
Original assignee: Tongji Medical College of Huazhong University of Science and Technology
Current assignee: Tongji Medical College of Huazhong University of Science and Technology
Priority date: 2021-03-25
Filing date: 2021-03-25
Publication date: 2022-01-04
Anticipated expiration: 2031-03-25

Abstract

The utility model relates to the technical field of medical equipment, and provides a disposable anti-reflux venous indwelling needle which comprises a needle head assembly, a catheter, a joint assembly, a body and a valve device, wherein a controller is installed on the outer wall of the body, a through hole is formed in the body, a guide groove is formed in the middle of the body, and the guide groove is communicated with the through hole; the valve device comprises two valve components, each valve component comprises a movable plate, an electromagnet, a permanent magnet and a pressure spring, the movable plates are arranged in the guide grooves, the electromagnets are installed on the groove walls of the guide grooves, which are far away from the through holes, and are electrically connected with the controller, the permanent magnets are installed on the movable plates, the first ends of the pressure springs are connected with the groove walls of the guide grooves, which are far away from the through holes, and the second ends of the pressure springs are connected with the movable plates. The utility model provides a disposable anti-backflow venous indwelling needle which can prevent blood backflow and enables liquid medicine to flow out smoothly during infusion.

Description

Disposable anti-backflow venous indwelling needle

Technical Field

The utility model relates to the technical field of medical equipment, in particular to a disposable anti-reflux venous indwelling needle.

Background

The use of the venous indwelling needle can reduce the pain of a patient caused by repeated puncture, protect the venous vessel and reduce the puncture pain of the patient and the workload of clinical nursing personnel, thereby being widely applied in the current clinic.

Chinese utility model patent No. CN209004891U discloses a vein indwelling needle, which controls the flow of the liquid medicine through the incision at the front end of the cannula, and can play a role in preventing blood backflow. However, there are the following problems: the presence of the incision makes it difficult to discharge the liquid medicine during infusion.

SUMMERY OF THE UTILITY MODEL

In view of the defects in the prior art, the utility model aims to provide a disposable anti-backflow venous indwelling needle which can prevent blood backflow and ensure that liquid medicine flows out smoothly during transfusion.

In order to achieve the purpose, the utility model is realized by the following technical scheme: a disposable anti-backflow venous indwelling needle comprises a needle head assembly, a catheter and a joint assembly, wherein a first end of the catheter is communicated with the joint assembly, the disposable anti-backflow venous indwelling needle further comprises a body and a valve device, a controller is installed on the outer wall of the body, a through hole penetrating along the extending direction of the body is formed in the body, a first end of the through hole is communicated with an infusion end of the needle head assembly, a second end of the through hole is communicated with a second end of the catheter, a guide groove is formed in the middle of the body, and the guide groove is communicated with the through hole;

the flap device is used for controlling the switching of through-hole, the flap device includes two flap subassemblies, two the flap subassembly sets up respectively the both ends of guide way, the flap subassembly includes fly leaf, electro-magnet, permanent magnet and pressure spring, the fly leaf sets up in the guide way, and with the cell wall sliding connection of guide way, the electro-magnet with the permanent magnet sets up relatively, the electro-magnet is installed keeping away from of guide way on the cell wall of through-hole, and with the controller electricity is connected, the permanent magnet is installed on the fly leaf, the first end of pressure spring with keeping away from of guide way the cell wall of through-hole is connected, the second end of pressure spring with the fly leaf is connected.

Further, a sealing gasket is installed at the top of the movable plate and is in contact with the groove wall of the guide groove.

Further, still install first button and second button on the outer wall of body, first button with the second button all with the controller electricity is connected.

Further, the first button and the second button have different colors.

The utility model has the beneficial effects that:

1. according to the disposable anti-backflow venous indwelling needle provided by the utility model, under a normal state, due to the action of the pressure spring, the two movable plates can approach each other, the through hole is closed, and blood backflow is prevented. During infusion, the controller energizes the electromagnet, so that the electromagnet and the permanent magnet attract each other, the two movable plates are away from each other, and the through hole is opened, so that the liquid medicine can flow smoothly.

2. The disposable anti-backflow venous indwelling needle provided by the utility model can also supply a certain negative pressure to the catheter through the injector after the electromagnet is electrified and the through hole is opened for blocking prevention, so that blood of a patient can flow back for a short distance, and the aim of preventing blockage of the indwelling needle is fulfilled.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of the body;

FIG. 3 is a front view of the main body;

FIG. 4 is a schematic cross-sectional view taken along the line A-A in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along line B-B in FIG. 3;

fig. 6 is an enlarged schematic view of the portion C in fig. 5.

Reference numerals: 10-needle assembly, 20-catheter, 30-connector assembly, 40-body, 41-controller, 42-through hole, 43-guide groove, 44-first button, 45-second button, 50-valve device, 60-valve assembly, 61-movable plate, 62-electromagnet, 63-permanent magnet, 64-pressure spring and 65-sealing gasket.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the utility model easy to understand, the utility model is further described with the specific embodiments.

In this application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., as meaning either a fixed connection or a removable connection, or an integral part; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the description of the present application, it is to be understood that the terms "longitudinal," "lateral," "horizontal," "top," "bottom," "upper," "lower," "inner" and "outer" and the like refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or components must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be considered limiting.

Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

As shown in Figs. 1-6, the present invention provides a single use anti-reflux venous retention needle comprising a needle assembly 10, a catheter tube 20, a connector assembly 30, a body 40 and a flap device 50. A first end of conduit 20 communicates with a connector assembly 30. The controller 41 is fixedly mounted on the outer wall of the body 40, and the body 40 is provided with a through hole 42 penetrating along the extending direction. A first end of the through bore 42 communicates with the administration end of the needle assembly 10 and a second end of the through bore 42 communicates with the second end of the catheter 20. The middle part of the body 40 is provided with a guide groove 43, the guide groove 43 is communicated with the through hole 42, and preferably, the extending direction of the guide groove 43 is perpendicular to the extending direction of the through hole 42.

The flap device 50 is used to control the opening and closing of the through hole 42. The flapper means 50 includes two flapper assemblies 60, and the two flapper assemblies 60 are respectively disposed at both ends of the guide groove 43. Specifically, the flapper assembly 60 includes a movable plate 61, an electromagnet 62, a permanent magnet 63, and a compression spring 64. The movable plate 61 is disposed in the guide groove 43 and slidably connected to a groove wall of the guide groove 43. The electromagnet 62 and the permanent magnet 63 are oppositely arranged, the electromagnet 62 is fixedly arranged on the groove wall of the guide groove 43 far away from the through hole 42 and is electrically connected with the controller 41, and the permanent magnet 63 is fixedly arranged on the movable plate 61. A first end of the compression spring 64 is connected with a groove wall of the guide groove 43 far away from the through hole 42, a second end of the compression spring 64 is connected with the movable plate 61, and the compression spring 64 makes the movable plate 61 have a tendency to be close to the middle of the through hole 42.

Under normal conditions, due to the action of the compression spring 64, the two movable plates 61 will approach each other, and at the same time, the through hole 42 is in a closed state, so that the blood can be prevented from flowing backwards. When transfusion is required, the controller 41 energizes the electromagnet 62, so that the electromagnet 62 and the permanent magnet 63 attract each other, and the two movable plates 61 are separated from each other, so that the through hole 42 is opened, and the liquid medicine can flow smoothly.

In order to prevent the blockage of the indwelling needle, after the electromagnet 62 is electrified and the through hole 42 is opened, the syringe gives a certain negative pressure to the catheter 20, so that the blood of the patient flows back for a short distance, and the aim of preventing the blockage of the indwelling needle is fulfilled.

In one embodiment, a packing 65 is installed on the top of the movable plate 61, and the packing 65 is in contact with the groove wall of the guide groove 43. The presence of the gasket 65 increases the tightness between the mobile plate 61 and the guide groove 43, so that blood cannot pass through the flap device 50 when the through hole 42 is in the closed state.

In one embodiment, a first button 44 and a second button 45 are further mounted on the outer wall of the body 40, and both the first button 44 and the second button 45 are electrically connected to the controller 41. The first button 44 and the second button 45 respectively control the power-off and the power-on of the electromagnet 62, so that the medical staff can conveniently operate, and further the work of the valve device 50 and the opening and closing of the through hole 42 are controlled.

In one embodiment, the first button 44 and the second button 45 are different colors to facilitate the medical professional to distinguish the functions represented by the buttons.

While there have been shown and described what are at present considered the fundamental principles and essential features of the utility model and its advantages, it will be apparent to those skilled in the art that the utility model is not limited to the details of the foregoing exemplary embodiments, but is capable of other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A disposable anti-reflux venous indwelling needle, comprising a needle head component, a catheter and a joint component, wherein the first end of the catheter is communicated with the joint component, and is characterized in that: the infusion needle comprises a needle head assembly, a controller is mounted on the outer wall of the body, a through hole penetrating along the extending direction of the body is formed in the body, the first end of the through hole is communicated with the infusion end of the needle head assembly, the second end of the through hole is communicated with the second end of the guide pipe, a guide groove is formed in the middle of the body, and the guide groove is communicated with the through hole;

2. The single use anti-reflux venous indwelling needle of claim 1, wherein: and a sealing gasket is arranged at the top of the movable plate and is in contact with the groove wall of the guide groove.

3. The single use anti-reflux venous indwelling needle of claim 1, wherein: still install first button and second button on the outer wall of body, first button with the second button all with the controller electricity is connected.

4. The single use anti-reflux venous retention needle as in claim 3, wherein: the first button and the second button have different colors.