Anti-reflux venous blood sampling device

Abstract

The utility model relates to the technical field of vein blood sampling, in particular to an anti-backflow vein blood sampling device. The utility model provides an anti-backflow vein blood sampling device which can effectively prevent blood from flowing back and ensure normal blood sampling work. An anti-backflow vein blood sampling device comprises a needle head, a connecting piece, a needle wing, a connecting pipe, a fixing assembly and the like, the connecting piece is connected to the left portion of the needle head, the needle wing is connected to the upper side of the right portion of the connecting piece, the connecting pipe is connected to the left side of the connecting piece, and the fixing assembly capable of being fixed to an arm is arranged on the connecting piece. After blood flows into the control cylinder, the blood flows into the conical thin film and the hard tube, the conical thin film and the hard tube are kept in linear communication and then flow out of the collecting head, and after the blood stops flowing into the conical thin film, the hard tube droops under the action of gravity to block the conical thin film, so that the blood can be effectively prevented from flowing back; and the effect of normal blood sampling work is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of venous blood sampling, especially to a backflow prevention venous blood sampling device. BACKGROUND

[0002] The backflow prevention venous blood sampling device is a medical device specially designed to prevent blood backflow (backflow) during blood sampling. This device can improve the safety and efficiency of blood sampling, reduce patient discomfort and the risk of complications.

[0003] The existing backflow prevention venous blood sampling device usually uses a film to prevent blood backflow during blood sampling. However, since the film needs to rely on its own elastic force to recover to the initial state to block blood, it is easily affected by external temperature, leading to failure and affecting the normal progress of blood sampling.

[0004] Therefore, a backflow prevention venous blood sampling device that can effectively prevent blood backflow and ensure the normal progress of blood sampling has been developed. SUMMARY

[0005] To overcome the shortcomings of the existing backflow prevention venous blood sampling device, which needs to rely on its own elastic force to recover to the initial state to block blood, is easily affected by external temperature, leading to failure and affecting the normal progress of blood sampling, the utility model provides a backflow prevention venous blood sampling device that can effectively prevent blood backflow and ensure the normal progress of blood sampling.

[0006] The technical solution is as follows: A backflow prevention venous blood sampling device includes a needle, a connecting piece, a needle wing, a connecting tube, a fixing assembly, and a backflow prevention assembly. The left part of the needle is connected to the connecting piece. The right upper side of the connecting piece is connected to the needle wing. The left side of the connecting piece is connected to the connecting tube. The connecting piece is provided with a fixing assembly that can be fixed on the arm. The connecting tube is provided with a backflow prevention assembly that can prevent venous blood backflow.

[0007] Optionally, the fixing assembly includes a mounting block, a rotating ring, a suction cup, a negative pressure bag, and a fixing block. The middle part of the connecting piece is rotatably connected to the rotating ring. The rotating ring is connected to the mounting block. The mounting block is connected to the needle wing through clamping. The upper side of the mounting block is connected to the negative pressure bag. The lower side of the mounting block is connected to the fixing block. The negative pressure bag is in communication with the fixing block. The lower side of the fixing block is connected to the suction cup. The fixing block is in communication with the suction cup.

[0008] Optionally, the backflow prevention assembly includes a control cylinder, a collection head, a fixing disc, a conical film, a hard tube, and a compression ring. The rear right side of the connecting tube is connected to the control cylinder. The right side of the control cylinder is connected to the collection head. The left inner side of the control cylinder is connected to the fixing disc. The right side of the fixing disc is connected to the conical film. The right side of the conical film is connected to the hard tube. The hard tube is sleeved with the compression ring.

[0009] Optionally, the device further comprises a protective cylinder, the control cylinder is threadedly connected with the protective cylinder at the right part of the control cylinder, and the protective cylinder is located outside the collection head.

[0010] Optionally, the protective cylinder is conical.

[0011] Optionally, the device further comprises a plurality of push pieces, and the push pieces are connected to the compression ring.

[0012] The device has the advantages that: 1. After blood flows into the control cylinder, the blood flows into the conical membrane and the hard tube, so that the conical membrane and the hard tube are kept in linear communication, and then the blood flows out of the collection head; after the blood stops flowing into the conical membrane, the hard tube is lowered by gravity to block the conical membrane, thereby effectively preventing blood backflow and ensuring normal blood collection.

[0013] 2. The device is rotated by rotating the mounting block to drive the rotating ring to rotate, so that the mounting block is separated from the needle wing, the suction cup is in contact with the hand of a blood collector, then the negative pressure bag is pressed to form a negative pressure environment in the suction cup and the fixing block, and the suction cup is adsorbed on the hand of the blood collector, thereby fixing the needle head and avoiding the needle head from falling off due to movement of the blood collector. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is a schematic view of a three-dimensional structure of the device.

[0015] Figure 2 It is a schematic view of a three-dimensional structure of the mounting block and the suction cup of the device.

[0016] Figure 3 It is a schematic view of a three-dimensional structure of the suction cup and the negative pressure bag of the device.

[0017] Figure 4 It is a schematic view of a three-dimensional structure of the control cylinder and the protective cylinder of the device.

[0018] Figure 5 It is a schematic view of a three-dimensional structure of the conical membrane and the hard tube of the device.

[0019] The reference signs are as follows: 1, needle head; 2, connecting piece; 201, needle wing; 3, mounting block; 301, rotating ring; 4, suction cup; 401, negative pressure bag; 402, fixing block; 5, connecting pipe; 6, control cylinder; 601, collection head; 7, protective cylinder; 8, fixing disc; 9, conical membrane; 10, hard tube; 11, compression ring; and 12, push piece. DETAILED DESCRIPTION

[0020] The embodiments of the device will be described below with reference to the drawings.

[0021] A device for preventing backflow of venous blood collection, such as Figures 1-5As shown, including a needle 1, connecting piece 2, needle wing 201, connecting pipe 5, fixed assembly and anti-backflow assembly, needle 1 left part is connected with connecting piece 2, connecting piece 2 right part upper side is connected with needle wing 201, connecting piece 2 left side is connected with connecting pipe 5, connecting piece 2 is equipped with fixed assembly, connecting pipe 5 is equipped with anti-backflow assembly.

[0022] As shown in Figures 1-3 , the fixed assembly includes mounting block 3, rotating ring 301, suction cup 4, negative pressure bag 401 and fixed block 402, connecting piece 2 middle part is rotatably connected with rotating ring 301, rotating ring 301 is connected with mounting block 3, mounting block 3 is connected with needle wing 201, mounting block 3 upper side is connected with negative pressure bag 401, mounting block 3 lower side is connected with fixed block 402, negative pressure bag 401 is communicated with fixed block 402, fixed block 402 lower side is connected with suction cup 4, fixed block 402 is communicated with suction cup 4.

[0023] As shown in Figure 1 , Figure 4 and Figure 5 , the anti-backflow assembly includes control cylinder 6, collection head 601, protection cylinder 7, fixed disc 8, conical film 9, hard pipe 10, pressure ring 11 and push piece 12, connecting pipe 5 rear part right side is connected with control cylinder 6, control cylinder 6 right side is connected with collection head 601, control cylinder 6 right part is screwedly connected with protection cylinder 7, protection cylinder 7 is conical, convenient to grip, protection cylinder 7 is located outside collection head 601, control cylinder 6 left part inner side is connected with fixed disc 8, fixed disc 8 right side is connected with conical film 9, conical film 9 right side is connected with hard pipe 10, hard pipe 10 is sleeved with pressure ring 11, pressure ring 11 is connected with three push pieces 12.

[0024] When the utility model is used, first, the medical staff inserts the needle 1 into the venous blood vessel of the blood donor, then inserts the collection head 601 into the blood collection tube, the protection cylinder 7 protects the medical staff from infection, when it is necessary to fix the needle 1 on the arm of the blood donor, the mounting block 3 can be rotated, the rotating ring 301 is rotated, the mounting block 3 is separated from the needle wing 201, then the suction cup 4 contacts the hand of the blood donor, then the negative pressure bag 401 is pressed, the fixing block 402 and the suction cup 4 form the negative pressure environment in the suction cup 4, the suction cup 4 is adsorbed on the hand of the blood donor, thereby the needle 1 can be fixed, the needle 1 is prevented from falling off due to the movement of the blood donor, then the blood flows into the connecting pipe 5 and the control cylinder 6 from the needle 1, flows into the blood collection tube through the collection head 601 and is collected, after the blood flows into the control cylinder 6, the tapered film 9 and the hard pipe 10 are communicated, the tapered film 9 and the hard pipe 10 keep straight-line communication, then the blood flows out from the collection head 601, after the blood stops flowing into the tapered film 9, the hard pipe 10 is lowered under the action of gravity, the tapered film 9 is blocked, when the blood flows back, the blood extrudes the pushing piece 12 and the pressure ring 11 to move left, the tapered film 9 is contracted, thereby the blood backflow can be effectively prevented, the blood collection work can be ensured to be normally carried out.

[0025] The above only describes the preferred embodiments of the utility model and does not limit the utility model, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A device for preventing backflow in venous blood collection, characterized in that, It includes a needle (1), a connector (2), a needle wing (201), a connecting tube (5), a fixing component and an anti-backflow component. The left side of the needle (1) is connected to the connector (2), the upper right side of the connector (2) is connected to the needle wing (201), the left side of the connector (2) is connected to the connecting tube (5), the connector (2) is provided with a fixing component that can be fixed to the arm, and the connecting tube (5) is provided with an anti-backflow component that can prevent venous blood from flowing back. The anti-backflow assembly includes a control cylinder (6), a sampling head (601), a fixed plate (8), a conical diaphragm (9), a rigid tube (10), and a pressure ring (11). The control cylinder (6) is connected to the right side of the rear part of the connecting tube (5). The sampling head (601) is connected to the right side of the control cylinder (6). The fixed plate (8) is connected to the inner left side of the control cylinder (6). The conical diaphragm (9) is connected to the right side of the fixed plate (8). The rigid tube (10) is connected to the right side of the conical diaphragm (9). The pressure ring (11) is fitted onto the rigid tube (10). It also includes a push plate (12), and multiple push plates (12) are connected to the pressure ring (11).

2. The anti-backflow venous blood collection device according to claim 1, characterized in that, The fixing component includes a mounting block (3), a rotating ring (301), a suction cup (4), a negative pressure bladder (401), and a fixing block (402). The rotating ring (301) is rotatably connected to the middle of the connector (2). The mounting block (3) is connected to the rotating ring (301). The mounting block (3) is engaged with the needle wing (201). The negative pressure bladder (401) is connected to the upper side of the mounting block (3). The fixing block (402) is connected to the lower side of the mounting block (3). The negative pressure bladder (401) is connected to the fixing block (402). The suction cup (4) is connected to the lower side of the fixing block (402). The fixing block (402) is connected to the suction cup (4).

3. The anti-backflow venous blood collection device according to claim 1, characterized in that, It also includes a protective cylinder (7), and the right side of the control cylinder (6) is threadedly connected to the protective cylinder (7), which is located outside the acquisition head (601).

4. The anti-backflow venous blood collection device according to claim 1, characterized in that, The protective cylinder (7) is conical.

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