Blood return prevention device capable of extending infusion tube

Abstract

The utility model relates to the technical field of infusion appliances, and discloses a blood return prevention device capable of extending an infusion tube, which comprises an original infusion tube, an extension tube and a needle tube, an original plug is arranged at the bottom end of the original infusion tube, the blood return prevention device is characterized in that the upper end of the extension tube is matched with the original plug, the outer surface of the extension tube is fixedly connected with a backflow prevention shell, and the needle tube is arranged in the backflow prevention shell. A plurality of anti-backflow assemblies in the same direction are arranged in the anti-backflow shell, and a secondary filtering device is arranged in the extension pipe. The blood return prevention device capable of lengthening the infusion tube has the advantages of being capable of lengthening the infusion tube, preventing blood return and the like, and solves the problems that when a traditional infusion apparatus is used, the length of the infusion tube is not enough due to the fact that the length of the infusion tube is fixed, a patient needs to move by holding a medicine bottle with hands when needing to walk, and when the medicine bottle is lower than the needle inserting position of the patient, the infusion tube cannot be lengthened. And the blood of the patient can flow back into the infusion tube, so that the body health of the patient is influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of infusion appliances, in particular to a device for preventing blood backflow from extending an infusion tube. Background Art

[0002] An infusion set is a common medical consumable. After sterilization, it establishes a channel between the vein and the medication solution and is used for intravenous infusion. It typically consists of eight connected components: an IV needle or hypodermic needle, a needle cap, an infusion hose, a medication filter, a flow regulator, a drip pot, a bottle stopper puncture device, and an air filter. During operation, the infusion bottle is hung on the infusion pole, air is vented until the medication flows to the lower end of the infusion tube, the regulator is closed, and the IV needle is inserted into the vein. Once secured, the tourniquet is removed and the flow rate is adjusted.

[0003] When using a traditional infusion set, the infusion tube is fixed in length, resulting in insufficient length. In addition, when the patient needs to move around, he needs to hold the medicine bottle. When the height of the medicine bottle is lower than the patient's injection site, the patient's blood will flow back into the infusion tube, affecting the patient's health. Therefore, an anti-blood backflow device that can extend the infusion tube is proposed to solve the above problems. Utility Model Content

[0004] (1) Technical problems solved

[0005] In response to the shortcomings of the existing technology, the utility model provides an extendable infusion tube anti-blood backflow device, which has the advantages of being able to extend the infusion tube and prevent blood backflow, and solves the problem that the length of the infusion tube of the traditional infusion device is fixed during use, resulting in insufficient length. In addition, when the patient needs to move around, he needs to hold the medicine bottle. When the height of the medicine bottle is lower than the patient's injection site, the patient's blood will flow back into the infusion tube, affecting the patient's health.

[0006] (2) Technical solution

[0007] The technical solution of the utility model to solve the above technical problems is as follows: an extendable infusion tube anti-blood backflow device, including an original infusion tube, an extension tube and a needle tube, the bottom end of the original infusion tube is provided with an original plug, the upper end of the extension tube is adapted to the original plug, the outer surface of the extension tube is fixedly connected to an anti-backflow shell, the interior of the anti-backflow shell is provided with multiple unidirectional anti-backflow components, the interior of the extension tube is provided with a secondary filtering device, and the bottom end of the extension tube is provided with an extension plug adapted to the needle tube.

[0008] The beneficial effects of the utility model are:

[0009] During use, the extendable infusion tube anti-blood backflow device can be installed by directly installing the extension tube between the existing original infusion tube and the needle tube, thereby achieving the effect of extending the infusion tube. The anti-backflow component located inside the anti-backflow shell can also prevent blood backflow when the patient is needled, and has the advantage of being easy to use.

[0010] On the basis of the above technical solution, the present invention can also be improved as follows.

[0011] Furthermore, the anti-backflow assembly includes a mounting frame, an anti-backflow valve and a retaining ring. The interior of the anti-backflow shell is fixedly connected to a ring-shaped array of mounting frames, and the mounting frames are fixedly connected to anti-backflow valves fixedly connected to the anti-backflow shell. The opposite side of the mounting frame is fixedly connected to a retaining ring adapted to the anti-backflow valve.

[0012] The beneficial effect of adopting the above-mentioned further scheme is that the anti-reflux valve is set in the direction of infusion, similar to the aortic valve, and is in a closed state in a static state. When liquid flows through, pressure is applied to the infusion section, and the anti-reflux valve opens in the direction of infusion, and the infusion channel is also opened; when the liquid is withdrawn, the anti-reflux valve closes to the middle due to pressure reasons, and then the liquid cannot be withdrawn, thereby preventing liquid reflux, and during use, when the force of withdrawing the liquid is too large, the retaining ring can support the anti-reflux valve to prevent it from tipping over in the direction opposite to the infusion direction.

[0013] Furthermore, the retaining ring is located on the left side of the mounting frame and the backflow prevention shell.

[0014] The beneficial effect of adopting the above further solution is that it can effectively prevent the anti-regurgitation valve from being squeezed or subjected to external forces that cause it to deviate and thus lose its function.

[0015] Furthermore, the number of the backflow prevention components is at least two.

[0016] Furthermore, the anti-reflux valve is made of medical silicone.

[0017] Furthermore, the inner diameters of the original infusion tube and the extension tube are consistent. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of the utility model;

[0019] Figure 2 This is a cross-sectional view of the practical backflow prevention component;

[0020] Figure 3 This is a right side cross-sectional view of the backflow prevention component of the utility model.

[0021] In the figure: 1. Original infusion tube; 11. Original plug; 2. Extension tube; 22. Extension plug; 3. Anti-backflow shell; 4. Anti-backflow assembly; 41. Mounting frame; 42. Anti-backflow valve; 43. Retaining ring; 5. Secondary filtration device; 6. Needle tube. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In the embodiment, Figure 1-3 Provided is an extendable infusion tube anti-blood backflow device, the utility model includes an original infusion tube 1, an extension tube 2 and a needle tube 6, the bottom end of the original infusion tube 1 is provided with an original plug 11, the upper end of the extension tube 2 is adapted to the original plug 11, the outer surface of the extension tube 2 is fixedly connected to a backflow prevention shell 3, the interior of the backflow prevention shell 3 is provided with multiple unidirectional backflow prevention components 4, the interior of the extension tube 2 is provided with a secondary filter device 5, and the bottom end of the extension tube 2 is provided with an extension plug 22 adapted to the needle tube 6;

[0024] The anti-backflow assembly 4 includes a mounting frame 41, an anti-backflow valve 42, and a retaining ring 43. The interior of the anti-backflow housing 3 is fixedly connected to the mounting frames 41 in an annular array. The mounting frames 41 are fixedly connected to the anti-backflow valve 42 fixedly connected to the anti-backflow housing 3. The opposite side of the mounting frame 41 is fixedly connected to the retaining ring 43 adapted to the anti-backflow valve 42.

[0025] The anti-reflux valve 42 is arranged in the direction of infusion, similar to the aortic valve. It is in a closed state in a static state. When liquid flows through, pressure is applied to the infusion section, and the anti-reflux valve 42 opens in the direction of infusion, and the infusion channel is also opened. When withdrawing liquid, the anti-reflux valve 42 closes to the middle due to pressure, and then the liquid cannot be withdrawn, thereby preventing liquid backflow. Moreover, during use, if the force of withdrawing liquid is too strong, the retaining ring 43 can support the anti-reflux valve 42 to prevent it from tipping in the direction opposite to the infusion direction.

[0026] The baffle ring 43 is located on the left side of the mounting frame 41 and the backflow prevention shell 3;

[0027] It can effectively prevent the anti-regurgitation valve 42 from being squeezed or subjected to external forces, causing it to deviate and lose its function;

[0028] The number of the backflow prevention components 4 is at least two.

[0029] The anti-reflux valve 42 is made of medical silicone.

[0030] The inner diameters of the original infusion tube 1 and the extension tube 2 are consistent.

[0031] Working principle:

[0032] Step 1: During use, the extension tube 2 can be directly installed between the existing original infusion tube 1 and the needle tube 6 to complete the installation and achieve the effect of extending the infusion tube;

[0033] Step 2: The anti-reflux valve 42 is set in the direction of infusion, similar to the aortic valve. It is in a closed state in a static state. When liquid flows through, pressure is applied to the infusion section, and the anti-reflux valve 42 opens in the infusion direction, and the infusion channel is also opened;

[0034] Step 3: When withdrawing the liquid, the anti-reflux valve 42 closes toward the middle due to pressure, and the liquid cannot be withdrawn, thereby preventing the liquid from flowing back. Moreover, during use, when the force of withdrawing the liquid is too large, the retaining ring 43 can support the anti-reflux valve 42 to prevent it from tipping over in the direction opposite to the infusion direction.

[0035] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply the existence of any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0036] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for preventing blood backflow of an extendable infusion tube, comprising an original infusion tube (1), an extension tube (2) and a needle tube (6), wherein the bottom end of the original infusion tube (1) is provided with an original plug (11), and the device is characterized in that: The upper end of the extension tube (2) is adapted to fit the original plug (11); the outer surface of the extension tube (2) is fixedly connected to an anti-backflow shell (3); a plurality of anti-backflow components (4) in the same direction are provided inside the anti-backflow shell (3); a secondary filtering device (5) is provided inside the extension tube (2); and the bottom end of the extension tube (2) is provided with an extension plug (22) adapted to fit the needle tube (6).

2. The device for preventing blood backflow in an extendable infusion tube according to claim 1, characterized in that: The anti-backflow assembly (4) comprises a mounting frame (41), an anti-backflow valve (42) and a retaining ring (43); the interior of the anti-backflow shell (3) is fixedly connected to the mounting frames (41) in an annular array; the mounting frames (41) are fixedly connected to the anti-backflow valve (42) fixedly connected to the anti-backflow shell (3); and the retaining ring (43) adapted to the anti-backflow valve (42) is fixedly connected to the opposite side of the mounting frame (41).

3. The device for preventing blood backflow in an extendable infusion tube according to claim 2, characterized in that: The baffle ring (43) is located on the left side of the mounting frame (41) and the backflow prevention shell (3).

4. The device for preventing blood backflow in an extendable infusion tube according to claim 1, characterized in that: The number of the backflow prevention components (4) is at least two.

5. The device for preventing blood backflow in an extendable infusion tube according to claim 2, characterized in that: The anti-reflux valve (42) is made of medical silica gel.

6. The device for preventing blood backflow in an extendable infusion tube according to claim 1, characterized in that: The inner diameters of the original infusion tube (1) and the extension tube (2) are consistent.

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