Disposable blood transfusion apparatus

Abstract

The disposable blood transfusion apparatus comprises a bottle penetrating needle, a liquid stopping clamp, a drip chamber, a flow regulator, a needle head and a plurality of transfusion catheters, the flow regulator comprises a shell, a rotating shaft, a rolling wheel and a locking device, a channel allowing the transfusion catheters to penetrate through is formed in the shell, and movable through grooves are formed in the side walls of the two sides of the shell respectively; the locking device comprises two moving blocks and a locking piece, sliding grooves are formed in the outer walls of the two sides of the shell respectively, the two moving blocks are detachably connected to the two ends of the rotating shaft respectively, the two moving blocks slide in the two sliding grooves respectively, and the two moving blocks are detachably connected to the two ends of the rotating shaft respectively. The locking piece is used for locking the position of the moving block in the sliding groove. The purpose of adjusting the infusion speed is achieved by rolling the infusion catheter through the rolling wheel and changing the sectional area of the infusion catheter, after the infusion speed is adjusted, the locking piece locks the positions of the rotating shaft and the rolling wheel by locking the position of the moving block, and the situation that the rolling wheel is prone to sliding can be improved.

Description

Technical Field

[0001] This utility model relates to the field of blood transfusion sets, and in particular to a disposable blood transfusion set. Background Technology

[0002] A transfusion set is an infusion device that establishes a pathway between blood and a vein. It typically includes a vial needle, a stopcock, a drip chamber, a flow regulator, and a needle, all connected together by an infusion tubing.

[0003] Currently, the commonly used roller-bevel flow rate regulator in clinical practice adjusts the infusion rate by changing the cross-sectional area of ​​the infusion tubing through toothed protrusions on the roller surface pressing against the beveled bottom wall of the casing. However, because this type of regulator relies solely on friction between the roller and the tubing to control the roller's position during infusion, the roller is prone to slippage, leading to unintended changes in the infusion rate and compromising accuracy. Furthermore, these drawbacks force healthcare professionals to increase the frequency of infusion monitoring, thus increasing the workload of nursing staff. Utility Model Content

[0004] To address the issue of roller slippage after the infusion flow rate is adjusted, this application provides a disposable blood transfusion set.

[0005] The disposable blood transfusion set provided in this application adopts the following technical solution:

[0006] A disposable blood transfusion set includes a vial needle, a stop clamp, a drip chamber, a flow regulator, a needle, and several infusion tubings. The tubings sequentially connect the vial needle, stop clamp, drip chamber, flow regulator, and needle. The flow regulator includes a housing, a rotating shaft, a roller, and a locking device. The housing has a channel for the infusion tubing to pass through. Movable slots are formed on both side walls of the housing, with the length of the slots forming an angle with the length of the channel. The rotating shaft is coaxially mounted on the roller, with its two ends movable within the two slots. The locking device includes two moving blocks and a locking element. Sliding grooves are formed on both outer side walls of the housing along the length of the sliding grooves. The two moving blocks are detachably connected to both ends of the rotating shaft and slide within the two sliding grooves. The locking element locks the moving blocks in their positions within the sliding grooves.

[0007] By adopting the above technical solution, the cross-sectional area of ​​the infusion tubing is changed by rolling the infusion tubing, thereby adjusting the infusion speed. After the infusion speed is adjusted, the locking component locks the position of the rotating shaft and the roller by locking the position of the moving block, which can improve the situation where the roller slips after the infusion flow rate is adjusted.

[0008] Preferably, the locking element includes two locking blocks and two racks. The two locking blocks are located on both sides of the two moving blocks. A wedge-shaped block is provided on the side of the locking block facing the moving block. A wedge-shaped groove with an interference fit is opened on the side of the moving block facing the locking block. The wedge-shaped block slides in the wedge-shaped groove along the sliding direction perpendicular to the moving block. The two racks are respectively arranged on the outer walls of the two sides of the housing along the sliding direction of the moving block. A plurality of first teeth are provided on the side of the locking block facing the moving block along the length direction of the rack. When the moving block is in the locked state, the rack meshes with the plurality of first teeth.

[0009] By adopting the above technical solution, after the infusion rate is adjusted, when it is necessary to lock the roller, the operator moves the locking block towards the rack side, so that the rack and several first teeth mesh with each other. At this time, the moving block can no longer move, and the position of the roller is also completely restricted. When it is necessary to adjust the infusion rate, the operator moves the locking block away from the rack side, so that the first teeth completely disengage from the rack. At this time, the roller can drive the moving block to move.

[0010] Preferably, the locking block has a force-applying block on the side away from the moving block.

[0011] By adopting the above technical solution, the force-applying block can help the operator move the locking block.

[0012] Preferably, the first tooth and several teeth on the rack are arranged in a tapering shape at their ends.

[0013] By adopting the above technical solution, when the locking block moves toward the moving block, the tapered inclined surface between adjacent teeth can play a guiding role, helping the rack and the first tooth on the locking block to mesh better.

[0014] Preferably, a slot is provided on the side of the movable block near the rotating shaft, and the end of the rotating shaft is engaged in the slot.

[0015] Preferably, the two sides of the roller abut against the two inner walls of the housing.

[0016] By adopting the above technical solution, the movement of the roller in the direction of the rotating shaft axis is restricted, the rolling stability of the roller is improved, and the roller can also better crush the infusion tubing.

[0017] Preferably, the roller surface has toothed protrusions in the circumferential direction.

[0018] By adopting the above technical solution, the toothed protrusions can increase the friction between the operator's hand and the roller, making it easier for the operator to roll the roller.

[0019] The main technical effects of this utility model are reflected in the following aspects:

[0020] 1. After the infusion rate of this utility model is adjusted, the locking component locks the position of the rotating shaft and the roller by locking the position of the moving block, which can improve the situation where the roller slips after the infusion flow rate is adjusted;

[0021] 2. After the infusion speed of this utility model is adjusted, when it is necessary to lock the roller, the operator moves the locking block towards the rack side, so that the rack and the first tooth mesh with each other. At this time, the moving block can no longer move, and the position of the roller is also completely restricted. When it is necessary to adjust the infusion speed, the operator moves the locking block towards the side away from the rack, so that the locking block is completely disengaged from the rack. At this time, the roller can drive the moving block to move. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the blood transfusion device according to an embodiment of this application.

[0023] Figure 2 This is a schematic diagram of the flow regulator in an embodiment of this application.

[0024] Figure 3 It is along Figure 2 A cross-sectional view along line AA in the middle.

[0025] Figure 4 yes Figure 3 Enlarged view of point B in the middle.

[0026] Explanation of reference numerals in the attached drawings: 11. Bottle needle; 12. Stop clamp; 13. Dropper; 14. Needle; 15. Infusion tubing; 2. Flow regulator; 21. Housing; 211. Channel; 212. Movable groove; 213. Slide groove; 22. Rotating shaft; 23. Roller; 231. Toothed protrusion; 3. Locking device; 31. Moving block; 311. Wedge groove; 312. Slot; 32. Locking element; 321. Locking block; 3211. Wedge block; 3212. First tooth; 3213. Force-applying block; 322. Rack. Detailed Implementation

[0027] The following is in conjunction with the appendix Figure 1-4 This application will be described in further detail to make the technical solution of this application easier to understand and master.

[0028] This application discloses a disposable blood transfusion set.

[0029] Reference Figure 1A disposable blood transfusion set according to this embodiment includes a vial needle 11, a stop clamp 12, a drip chamber 13, a flow regulator 2, a needle 14, and several infusion tubing 15, wherein the several infusion tubing 15 sequentially connect the vial needle 11, the stop clamp 12, the drip chamber 13, the flow regulator 2, and the needle 14 together.

[0030] Reference Figure 1 When in use, puncture the blood bag with the needle 11, then open the stopcock 12, use the flow regulator 2 to control the blood flow, expel the air from the needle 14 and the corresponding infusion tubing 15, and then insert the needle into the patient's vein to perform the blood transfusion.

[0031] Reference Figures 2-4 The flow regulator 2 includes a housing 21, a rotating shaft 22, a roller 23, and a locking device 3. The housing 21 has a channel 211 through which the infusion tubing 15 passes. Movable grooves 212 are respectively provided on the two side walls of the housing 21. The length direction of the movable grooves 212 forms an angle with the length direction of the channel 211. The rotating shaft 22 is coaxially mounted on the roller 23. The two ends of the rotating shaft 22 are respectively movable in the two movable grooves 212. The locking device 3 includes two moving blocks 31 and a locking element 32. Slide grooves 213 are respectively provided on the two outer walls of the housing 21 along the length direction of the movable grooves 212. The two moving blocks 31 are detachably connected to the two ends of the rotating shaft 22. The two moving blocks 31 slide in the two slide grooves 213 respectively. The locking element 32 is used to lock the position of the moving blocks 31 in the slide grooves 213.

[0032] Reference Figures 2-4 The infusion tubing 15 is rolled by roller 23, which changes the cross-sectional area of ​​the infusion tubing 15 to adjust the infusion rate. After the infusion rate is adjusted, locking member 32 locks the position of rotating shaft 22 and roller 23 by locking the position of moving block 31, which can prevent the roller 23 from slipping after the infusion flow rate is adjusted.

[0033] Reference Figures 2-4The locking component 32 includes two locking blocks 321 and two racks 322. The two locking blocks 321 are located on both sides of the two moving blocks 31. A wedge block 3211 is provided on the side of the locking block 321 facing the moving block 31. A wedge groove 311 is opened on the side of the moving block 31 facing the locking block 321, which is interference-fitted with the wedge block 3211. The wedge block 3211 slides in the wedge groove 311 along the sliding direction perpendicular to the moving block 31. The two racks 322 are respectively arranged on the outer walls of the housing 21 on both sides along the sliding direction of the moving block 31. A plurality of first teeth 3212 are provided on the side of the locking block 321 facing the moving block 31 along the length direction of the rack 322. When the moving block 31 is in the locked state, the rack 322 meshes with the plurality of first teeth 3212. The plurality of first teeth 3212 and the plurality of teeth on the corresponding part of the rack 322 are arranged alternately.

[0034] Reference Figures 2-4 After the infusion rate is adjusted, when it is necessary to lock the roller 23, the operator moves the locking block 321 toward the rack 322 so that the rack 322 meshes with several first teeth 3212. At this time, the moving block 31 can no longer move, and the position of the roller 23 is completely restricted. When it is necessary to adjust the infusion rate, the operator moves the locking block 321 toward the side away from the rack 322 so that the first teeth 3212 completely disengage from the rack 322. At this time, the roller 23 can drive the moving block 31 to move.

[0035] Reference Figures 2-4 A force-applying block 3213 is fixedly provided on the side of the locking block 321 away from the moving block 31. The force-applying block 3213 can help the operator to move the locking block 321.

[0036] Reference Figures 2-4 The first tooth 3212 and several teeth on the rack 322 are arranged in a tapered shape at their respective ends. When the locking block 321 moves toward the moving block 31, the tapered slope between adjacent teeth can play a guiding role, helping the rack 322 and the first tooth 3212 on the locking block 321 to mesh together better.

[0037] Reference Figures 2-4 A slot 312 is provided on the side of the movable block 31 near the rotating shaft 22, and the end of the rotating shaft 22 is engaged in the slot 312.

[0038] Reference Figures 2-4 The two sides of the roller 23 abut against the inner walls of the two sides of the housing 21, respectively. This restricts the movement of the roller 23 along the axis of the rotating shaft 22, improves the rolling stability of the roller 23, and also allows the roller 23 to better crush the infusion tubing 15.

[0039] Reference Figures 2-4The roller 23 has toothed protrusions 231 on its surface in the circumferential direction. The toothed protrusions 231 can increase the friction between the operator's hand and the roller 23, making it easier for the operator to roll the roller 23.

[0040] Of course, the above are just typical examples of this application. In addition, this application may have many other specific implementation methods. All technical solutions formed by equivalent substitution or equivalent transformation fall within the scope of protection claimed in this application.

Claims

1. A disposable blood transfusion set, characterized in that: The device includes a vial (11), a stop clamp (12), a drip chamber (13), a flow regulator (2), a needle (14), and several infusion tubing (15). The several infusion tubing (15) sequentially connect the vial (11), stop clamp (12), drip chamber (13), flow regulator (2), and needle (14). The flow regulator (2) includes a housing (21), a rotating shaft (22), a roller (23), and a locking device (3). The housing (21) has a channel (211) for the infusion tubing (15) to pass through. Movable slots (212) are respectively provided on the two side walls of the housing (21). The length direction of the movable slots (212) forms an angle with the length direction of the channel (211). The rotating shaft (22) is coaxially mounted on the roller (15). On 23), the two ends of the rotating shaft (22) are respectively movable in two movable through grooves (212). The locking device (3) includes two moving blocks (31) and a locking member (32). The outer walls on both sides of the housing (21) are respectively provided with sliding grooves (213) along the length direction of the movable through grooves (212). The two moving blocks (31) are respectively detachably connected to the two ends of the rotating shaft (22). The two moving blocks (31) slide in the two sliding grooves (213). The locking member (32) is used to lock the position of the moving blocks (31) in the sliding grooves (213). The locking element (32) includes two locking blocks (321) and two racks (322). The two locking blocks (321) are located on both sides of the two moving blocks (31). A wedge-shaped block (3211) is provided on the side of the locking block (321) facing the moving block (31). A wedge-shaped groove (311) with an interference fit to the wedge-shaped block (3211) is opened on the side of the moving block (311) facing the locking block (321). The wedge-shaped block (3211) is perpendicular to the vertical... The sliding block (31) slides in the wedge groove (311) in the direction of sliding of the moving block (31). Two racks (322) are respectively arranged on the outer walls of the two sides of the housing (21) along the sliding direction of the moving block (31). The locking block (321) has a plurality of first teeth (3212) on one side facing the moving block (31) along the length direction of the rack (322). When the moving block (31) is in the locked state, the rack (322) and the plurality of first teeth (3212) mesh with each other.

2. The disposable blood transfusion set according to claim 1, characterized in that: The locking block (321) has a force-applying block (3213) on the side away from the moving block (31).

3. The disposable blood transfusion set according to claim 1, characterized in that: The first tooth (3212) and several teeth on the rack (322) are arranged in a tapering shape at their ends.

4. The disposable blood transfusion set according to claim 1, characterized in that: A slot (312) is provided on one side of the movable block (31) near the rotating shaft (22), and the end of the rotating shaft (22) is engaged in the slot (312).

5. The disposable blood transfusion set according to claim 1, characterized in that: The two sides of the roller (23) abut against the inner walls of the two sides of the housing (21).

6. The disposable blood transfusion set according to claim 1, characterized in that: The surface of the roller (23) is provided with toothed protrusions (231) in the circumferential direction.

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