Blood transfusion device with adjustable transfusion speed

Abstract

The application belongs to the technical field of medical devices, and particularly relates to a transfusion device with adjustable transfusion speed, which comprises a transfusion device, a control unit arranged on the transfusion device, a shell arranged on the outer side of the transfusion device, a fixing groove matched with a drip tube of the transfusion device and arranged in the middle of the shell, the drip tube of the transfusion device being slidably arranged in the fixing groove, a cover plate bolted to the opening of the shell, an adjusting structure arranged at the bottom of the shell, and a timer fixed to the side of the cover plate away from the shell. The medical staff controls the transfusion flow rate of the transfusion device by using the adjusting structure, and the timer is used for timing to remind the medical staff to adjust again after the specified time. Therefore, the medical staff does not need to remember a large number of transfusion times of different patients, the work handover between different medical staff and the operation consistency are facilitated, the work load and work difficulty of the medical staff are reduced, and the work efficiency of the medical staff is improved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically a blood transfusion device with adjustable transfusion rate. Background Technology

[0002] A transfusion set is an infusion device used to establish an infusion connection between blood and a vein. In hospitals, when patients need blood transfusions due to injuries or other causes, a transfusion set is used to transfer blood from a blood bag into the patient's vein to replenish the patient's own blood loss.

[0003] Blood transfusion includes the infusion of whole blood, red blood cells, platelets, and plasma. For the first 15 minutes of whole blood and red blood cell infusion, the transfusion rate should be controlled at 60-120 ml / H (15-30 drops / min). After 15 minutes, if the patient can tolerate it, the transfusion rate should be adjusted to 240 ml / H (60 drops / min). For plasma and platelets infusion, the first 15 minutes of infusion should be controlled at 120-300 ml / H (30-75 drops / min). After 15 minutes, if the patient can tolerate it, the transfusion rate should be adjusted to 300 ml / H (75 drops / min). For critically ill patients or those with circulatory overload, the transfusion rate should be adjusted to 1 ml / kg / H. Simultaneously, in clinical practice, vital signs should be measured within 1 hour before transfusion, 15 minutes before transfusion, every hour, and after transfusion.

[0004] The transfusion rate is adjusted according to the blood products and the patient's condition. The busy work of medical staff often makes it impossible to accurately measure the transfusion time and rate. Furthermore, currently, medical staff mostly control the transfusion rate by looking at a watch, and there are time differences in operation between different medical staff. This greatly increases the workload of medical staff and reduces work efficiency.

[0005] Therefore, the present invention provides a blood transfusion device with adjustable transfusion rate. Summary of the Invention

[0006] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0007] The technical solution adopted by this invention to solve its technical problem is as follows: A blood transfusion set with adjustable transfusion rate, comprising a blood transfusion set; a control unit is provided on the blood transfusion set; the control unit includes a housing disposed on the outside of the blood transfusion set; a fixing groove matching the drip tube of the blood transfusion set is opened in the middle of the housing; the drip tube of the blood transfusion set is slidably installed in the fixing groove; a cover plate is bolted to the opening of the housing; an adjustment structure is provided at the bottom of the housing, and the adjustment structure is used to control and adjust the transfusion rate of the blood transfusion set; a timer is fixedly connected to the side of the cover plate away from the housing; medical personnel use the adjustment structure to control the transfusion flow rate of the blood transfusion set, and use the timer to keep track of the time, reminding medical personnel to readjust after the specified time; thus, medical personnel do not need to memorize the transfusion times of a large number of different patients, and at the same time, it facilitates the handover of work and the consistency of operation between different medical personnel, reduces the workload and difficulty of medical personnel, and improves the work efficiency of medical personnel.

[0008] Preferably, the adjusting structure includes cavities formed on both sides of the bottom of the housing; a through groove is formed between the two cavities, and the through groove penetrates the bottom of the fixing groove; a base is fixedly connected to the middle of the side of the cavity away from the fixing groove; a bidirectional screw is rotatably installed between the two bases; a clamping block is slidably installed inside the through groove; a slider is fixedly connected to the side of the clamping block away from the fixing groove; the bidirectional screw passes through the slider, and the bidirectional screw is threadedly engaged with the slider; a rotating rod is rotatably installed on the top surface of one base; a gear is fixedly connected to one end of the rotating rod; the bidirectional screw is near the gear A face gear is fixed to the outer ring of one end of the wheel; the face gear meshes with a gear; a handle is rotatably mounted on the cover plate at the position of the rotating rod; the handle is connected to the other end of the rotating rod; an annular angle scale line is opened on the outer ring of the handle on the cover plate; the clamps on both sides are close to each other to squeeze the tubing of the infusion set, slowing down the blood flow rate of the blood transfusion set; when the medical staff rotates the handle in the opposite direction, the clamps on both sides move away from each other, loosening the tubing of the infusion set and restoring the blood flow rate of the blood transfusion set; thus, the blood flow rate of the blood transfusion set is regulated and controlled, reducing the differences in operation between different medical staff.

[0009] Preferably, a fixing hole is provided at one end of the handle near the rotating rod; multiple grooves are provided around the outer circumference of the rotating rod near the handle; a rubber fastening ring is fitted inside the groove of the outer circumference of the rotating rod; the outer wall of the rubber fastening ring slides in fit with the inner wall of the fixing hole; thereby facilitating the installation and removal of the cover plate, and at the same time, facilitating the fixed connection between the handle and the rotating rod during installation.

[0010] Preferably, a pair of guide slides are fixedly connected to the side of the cavity away from the housing; a connecting block is slidably installed inside the guide slide; the connecting block is fixedly connected to the clamping block; by sliding the connecting block along the inside of the guide slide, the sliding of the clamping block is guided and limited, reducing the probability of the clamping block detaching from the inside of the through groove and reducing the probability of the clamping block colliding with the face gear.

[0011] Preferably, a buzzer is fixedly connected to the side of the cover away from the housing; the buzzer is electrically connected to the timer; the buzzer emits a beeping sound to promptly remind medical staff, reducing the probability that medical staff will forget the time or leave the ward and fail to notice in time.

[0012] Preferably, multiple No. 1 magnets are fixedly attached to one side of the cover plates on both sides that are close to each other; a fixing band is attracted between the No. 1 magnets on both sides; the two ends of the fixing band are made of magnetic material, and the middle part of the fixing band is made of elastic material; thereby reducing the probability of the control unit detaching from the blood transfusion set and improving the control stability of the control unit in controlling the blood transfusion flow rate of the blood transfusion set.

[0013] Preferably, the blood transfusion set has a filter screen inside the drip tube; a backflushing port is connected to the bottom of the drip tube; a suction tube is fixed to the drip tube; the suction tube passes through the top of the drip tube and its bottom end extends into the bottom of the filter screen; both the backflushing port and the suction tube are connected to a flexible tube; a fixed interface is connected to the end of the flexible tube away from the blood transfusion set; slots are provided on both sides of the housing; the fixed interface is located inside the slot; multiple arc-shaped spring pieces are fixedly attached to the outer ring of the bottom of the filter screen, and the outer wall of the arc-shaped spring pieces slides in contact with the inner wall of the drip tube; multiple balloons are fixedly attached to the middle of one of the flexible tubes connected to the backflushing port, and an elastic hole is provided at the end of the balloon near the backflushing port; thus, it is convenient for medical personnel to clear the filter screen blockage inside the blood transfusion set drip tube, and the stability of the blood transfusion rate of the blood transfusion set is improved.

[0014] Preferably, the top of the housing is also provided with an adjustment structure, which is used to control the blood transfusion rate at the top of the blood transfusion set drip tube; it prevents the injected saline and aggregates from entering the blood bag upwards along the blood transfusion set, thereby reducing the probability of blood contamination in the blood bag.

[0015] Preferably, a nylon strap is fixed to the top of the housing; this allows the weight of the control unit to act on the infusion stand through the nylon strap, reducing the weight load on the blood transfusion set and lowering the probability of the blood transfusion set breaking or falling off.

[0016] Preferably, a second magnet is fixed to the side of the housing away from the cover plate, and the side of the second magnet away from the housing has a concave surface; multiple pairs of Velcro straps are evenly fixed to both sides of the second magnet; the Velcro straps reduce the probability of the housing shaking and facilitate the operation of medical personnel.

[0017] The beneficial effects of this invention are as follows:

[0018] 1. The present invention discloses an adjustable transfusion set, comprising a transfusion set, a housing, a timer, and an adjustment structure. Medical personnel use the adjustment structure to control the transfusion flow rate of the transfusion set. After adjustment, the timer is used to remind medical personnel to readjust the set time. This eliminates the need for medical personnel to memorize the transfusion times of numerous different patients, facilitates the exchange of work and consistency of operation among different medical personnel, reduces the workload and difficulty of medical personnel, and improves their work efficiency.

[0019] 2. The blood transfusion set with adjustable transfusion rate described in this invention comprises a backflush interface, a suction tube, a flexible tube, and a fixing interface. Using a syringe, physiological saline is injected from the bottom of the transfusion set's dropper through the flexible tube and backflush interface. The saline impacts the filter screen from the bottom upwards, clearing any buildup on the screen and mixing it with the saline. Another syringe is then used to extract the saline and buildup from inside the filter screen through the suction tube and flexible tube. This process of injecting and extracting saline is repeated until there is no significant blockage on the filter screen. Then, the adjustment mechanism at the bottom of the casing is opened to continue the transfusion process. This facilitates the clearing of filter blockages inside the transfusion set's dropper by medical personnel and improves the stability of the transfusion rate. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a perspective view of Embodiment 1 of the present invention;

[0022] Figure 2 This is an internal structural diagram of the shell in Embodiment 1 of the present invention;

[0023] Figure 3 This is an exploded view of Embodiment 1 of the present invention;

[0024] Figure 4 This is an exploded view of the adjustment structure in Embodiment 1 of the present invention;

[0025] Figure 5 This is a cross-sectional view of the cavity in Embodiment 1 of the present invention;

[0026] Figure 6 This is a perspective view of the shell in Embodiment 1 of the present invention;

[0027] Figure 7 This is a cross-sectional view of the shell in Embodiment 1 of the present invention;

[0028] Figure 8 This is a perspective view of Embodiment 2 of the present invention;

[0029] In the diagram: 1. Blood transfusion set; 2. Shell; 3. Fixing groove; 4. Cover plate; 5. Timer; 6. Cavity; 7. Through groove; 8. Insert; 9. Bidirectional screw; 10. Clamping block; 11. Sliding block; 12. Rotating rod; 13. Gear; 14. Face gear; 15. Rotating handle; 16. Fixing hole; 17. Rubber fastening ring; 18. Guide slide; 19. Connecting block; 20. Buzzer; 21. Magnet No. 1; 22. Fixing strap; 23. Backflush interface; 24. Aspiration tube; 25. Tube; 26. Fixing interface; 27. Slot; 28. Nylon sling; 29. ​​Magnet No. 2; 30. Velcro strap; 31. Curved spring; 32. Balloon. Detailed Implementation

[0030] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0031] Example 1

[0032] like Figures 1 to 3 As shown in the figure, an adjustable transfusion set according to an embodiment of the present invention includes a transfusion set 1; a control unit is provided on the transfusion set 1; the control unit includes a housing 2 disposed on the outside of the transfusion set 1; a fixing groove 3 is provided in the middle of the housing 2 to match the drip tube of the transfusion set 1; the drip tube of the transfusion set 1 is slidably installed in the fixing groove 3; a cover plate 4 is bolted to the opening of the housing 2; an adjustment structure is provided at the bottom of the housing 2, and the adjustment structure is used to control and adjust the transfusion rate of the transfusion set 1; a timer 5 is fixedly connected to the side of the cover plate 4 away from the housing 2. When using the transfusion set 1 to transfuse blood to a patient, the fixing slot 3 on the housing 2 of the control unit is engaged with the outside of the drip tube of the transfusion set 1. Medical personnel use the adjustment mechanism to control the blood flow rate of the transfusion set 1. After adjustment, the timer 5 is used to keep track of the time and remind the medical personnel to readjust after the specified time. This eliminates the need for medical personnel to memorize the transfusion times of a large number of different patients, and also facilitates the handover of work and the consistency of operation between different medical personnel, reducing the workload and difficulty of medical personnel and improving their work efficiency.

[0033] like Figures 2 to 7As shown, the adjustment structure includes cavities 6 on both sides of the bottom of the housing 2; a through groove 7 is provided between the two cavities 6, and the through groove 7 penetrates the bottom of the fixing groove 3; a base 8 is fixedly connected to the middle of the side of the cavity 6 away from the fixing groove 3; a bidirectional screw 9 is rotatably installed between the two bases 8; a clamping block 10 is slidably installed inside the through groove 7; a slider 11 is fixedly connected to the side of the clamping block 10 away from the fixing groove 3; the bidirectional screw 9 penetrates the slider 11, and the bidirectional screw 9 and the slider 11 are threadedly engaged; a rotating rod 12 is rotatably installed on the top surface of one of the bases 8; a gear 13 is fixedly connected to one end of the rotating rod 12; a face gear 14 is fixedly connected to the outer ring of the end of the bidirectional screw 9 near the gear 13; the face gear 14 meshes with the gear 13; a rotating handle 15 is rotatably installed on the cover plate 4 at the position of the rotating rod 12; the rotating handle 15 is connected to the other end of the rotating rod 12; the cover plate When the rotating handle 15 is in operation, with an annular angle scale line on the outer ring, medical personnel can adjust it by rotating the handle 15, causing the rotating rod 12 to rotate, which in turn drives the gear 13 to rotate, which in turn drives the meshing face gear 14 to rotate, which in turn drives the bidirectional screw 9 to rotate, causing the sliders 11 on both sides to slide towards each other, and causing the clamping blocks 10 on both sides to slide towards each other along the through groove 7. With the help of the angle scale line, the sliding distance of the clamping blocks 10 on both sides can be accurately controlled, and the clamping degree of the clamping blocks 10 on the tubing of the infusion set 1 can be accurately controlled. When the clamping blocks 10 on both sides are close together, they squeeze the tubing of the infusion set 1, slowing down the blood flow rate of the blood transfusion set 1. When the medical personnel rotate the handle 15 in the opposite direction, the clamping blocks 10 on both sides move away, loosening the tubing of the infusion set 1 and restoring the blood flow rate of the blood transfusion set 1. This completes the adjustment and control of the blood flow rate of the blood transfusion set 1, reducing the differences in operation between different medical personnel.

[0034] like Figures 4 to 5 As shown, a fixing hole 16 is provided at one end of the handle 15 near the rotating rod 12; multiple grooves are provided around the outer circumference of the rotating rod 12 near the handle 15; a rubber fastening ring 17 is fitted inside the groove of the outer circumference of the rotating rod 12; the outer wall of the rubber fastening ring 17 slides in fit with the inner wall of the fixing hole 16; during operation, when installing the cover plate 4, the fixing hole 16 of the handle 15 is aligned with the rotating rod 12, so that the rotating rod 12 is inserted into the interior of the fixing hole 16, and the rubber fastening ring 17 is squeezed and clamped between the rotating rod 12 and the fixing hole 16, thereby facilitating the installation and removal of the cover plate 4, and at the same time, facilitating the fixed connection between the handle 15 and the rotating rod 12 during installation.

[0035] like Figures 4 to 6As shown, a pair of guide slides 18 are fixedly connected to the side of the cavity 6 away from the housing 2; a connecting block 19 is slidably installed inside the guide slide 18; the connecting block 19 is fixedly connected to the clamping block 10; by sliding the connecting block 19 along the inside of the guide slide 18, the sliding of the clamping block 10 is guided and limited, reducing the probability of the clamping block 10 disengaging from the inside of the through groove 7 and reducing the probability of the clamping block 10 colliding with the face gear 14.

[0036] like Figure 1 and Figure 3 As shown, a buzzer 20 is fixedly connected to the side of the cover plate 4 away from the housing 2; the buzzer 20 is electrically connected to the timer 5; when working, after the time set by the timer 5 expires, the generated electrical signal controls the buzzer 20 to emit a buzzing sound to promptly remind medical staff, reducing the probability that medical staff will forget the time or leave the ward and cannot be notified in time.

[0037] like Figures 1 to 3 As shown, multiple magnets 21 are fixed to one side of the cover plates 4 on both sides; a fixing band 22 is attracted between the magnets 21 on both sides; the two ends of the fixing band 22 are made of magnetic material, and the middle part of the fixing band 22 is made of elastic material; during operation, after the dropper of the blood transfusion set 1 is placed inside the fixing groove 3 of the housing 2, the two ends of the fixing band 22 are attracted to the magnets 21 on both sides of the cover plate 4 respectively, so that the middle part of the fixing band 22 is stretched, and the fixing band 22 presses the dropper of the blood transfusion set 1 into the fixing groove 3 of the housing 2, thereby reducing the probability of the control unit detaching from the blood transfusion set 1 and improving the control stability of the blood transfusion flow rate of the blood transfusion set 1 by the control unit.

[0038] like Figure 1 , Figure 2 , Figure 3 and Figure 7As shown, the blood transfusion set 1 has a filter screen inside the drip tube; the bottom of the drip tube of the blood transfusion set 1 is connected to a backflushing port 23; the drip tube of the blood transfusion set 1 is fixed with a suction vertical tube 24; the suction vertical tube 24 passes through the top of the drip tube of the blood transfusion set 1, and the bottom end of the suction vertical tube 24 extends into the bottom of the inner side of the filter screen; both the backflushing port 23 and the suction vertical tube 24 are connected to a flexible tube 25; the end of the flexible tube 25 away from the blood transfusion set 1 is connected to a fixing port 26; both sides of the housing 2 are provided with slots 27; the fixing port 26 is located inside the slots 27; multiple arc-shaped spring pieces 31 are fixedly attached to the outer ring of the bottom of the filter screen of the blood transfusion set 1, and the outer wall of the arc-shaped spring pieces 31 is fixed to the blood transfusion set 1. The inner wall of the dropper slides in fit; multiple balloons 32 are fixedly connected to the middle of one of the hoses 25 connected to the backflush interface 23, and the end of the balloon 32 near the backflush interface 23 is provided with an elastic hole; during blood transfusion, a small amount of aggregates in the blood may clog the filter screen inside the dropper of the blood transfusion set 1, blocking the normal delivery of blood and reducing the blood transfusion flow rate of the blood transfusion set 1; during operation, when the filter screen inside the dropper of the blood transfusion set 1 becomes clogged, the adjustment structure at the bottom of the housing 2 is used to clamp and cut off the flow of the tube at the bottom of the dropper of the blood transfusion set 1, reducing the probability of saline flowing into the patient's body along the blood transfusion set 1; then, a syringe is connected to the fixed interface 26 connected to the aspiration vertical tube 24, which is used to... The syringe is used to draw blood from the drip chamber of transfusion set 1; then, a new syringe is used to draw saline solution, and this syringe is connected to the fixed interface 26 of the backflush interface 23. The saline solution in the syringe is quickly injected from the bottom of the drip chamber of transfusion set 1 through the tubing 25 and the backflush interface 23. After the saline solution enters the balloon 32, the balloon 32 inflates. When the pressure generated by the inflation of the balloon 32 exceeds the elastic force of the elastic hole of the balloon 32, the elastic hole of the balloon 32 opens, and the saline solution inside the balloon 32 is quickly discharged into the drip chamber of transfusion set 1, forming multiple water flow impacts in the drip chamber of transfusion set 1. The saline solution impacts the filter screen from the bottom upwards, causing the filter screen to... During the process of clearing blockages, as the saline solution surges upwards, it passes through the arc-shaped spring 31, causing the spring 31 to vibrate. This vibration causes the filter screen to vibrate as well, improving the efficiency of separating the aggregates from the filter screen and allowing the aggregates to mix into the saline solution. Subsequently, the syringe used for aspiration draws out the saline solution and aggregates from inside the filter screen through the aspiration tube 24 and the tubing 25. After repeatedly injecting and withdrawing saline solution until there is no obvious blockage on the filter screen, the adjustment structure at the bottom of the housing 2 is opened to continue the blood transfusion. This facilitates the medical staff in clearing the filter screen blockage inside the blood transfusion set 1 dropper and improves the stability of the blood transfusion rate of the blood transfusion set 1.

[0039] like Figure 2 , Figure 3 , Figure 6 and Figure 7As shown, the top of the housing 2 is also provided with an adjustment structure, which is used to control the blood transfusion rate at the top of the blood transfusion set 1 dropper. During operation, when it is necessary to backflush and unclog the filter inside the blood transfusion set 1 dropper, the adjustment structure at the top of the housing 2 is used to clamp and cut off the flow of the tube at the top of the blood transfusion set 1 dropper, preventing the injected saline and aggregates from entering the blood bag upwards along the blood transfusion set 1, thereby reducing the probability of blood contamination in the blood bag.

[0040] like Figure 1 As shown, a nylon sling 28 is fixed to the top of the housing 2. During operation, when the blood transfusion set 1 is used to transfuse blood to a patient, the fixing groove 3 on the housing 2 is engaged with the outside of the drip tube of the blood transfusion set 1, and the nylon sling 28 is hung on the infusion stand. This allows the weight of the control unit to act on the infusion stand through the nylon sling 28, reducing the weight load on the blood transfusion set 1 and reducing the probability of the blood transfusion set 1 breaking or falling off.

[0041] Example 2

[0042] like Figure 8 As shown in the comparative embodiment one, another embodiment of the present invention is as follows: a second magnet 29 is fixedly connected to the side of the housing 2 away from the cover plate 4, and a concave surface is formed on the side of the second magnet 29 away from the housing 2; multiple pairs of Velcro straps 30 are evenly fixed to both sides of the second magnet 29; when the blood transfusion set 1 is used to transfuse blood to the patient, the second magnet 29 is used to attract the housing 2 to the iron frame of the infusion stand or the hospital bed, and it is fixed by the Velcro straps 30, which reduces the probability of the housing 2 shaking, and at the same time facilitates the operation of medical staff.

[0043] Working principle: During installation, the fixing groove 3 on the housing 2 is snapped onto the outside of the drip tube of the blood transfusion set 1. The two tubing tubes are connected to the backflushing interface 23 and the suction vertical tube 24 respectively. Then, the fixing interfaces 26 on both sides are fixed into the slots 27 on both sides of the housing 2. The cover plate 4 is fixed to the housing 2 with bolts, so that the fixing hole 16 of the handle 15 is aligned with the rotating rod 12, so that the rotating rod 12 is inserted into the fixing hole 16. The rubber fastening ring 17 is squeezed and clamped between the rotating rod 12 and the fixing hole 16. The handle 15 and the rotating rod 12 are then connected. The rods 12 are fixedly connected; then the two ends of the fixing strap 22 are attracted to the first magnet 21 on both sides of the cover plate 4, so that the middle part of the fixing strap 22 is stretched and the fixing strap 22 presses the drip tube of the blood transfusion set 1 into the fixing groove 3 of the housing 2; the nylon sling 28 is hung on the infusion stand, so that the weight of the control unit is applied to the infusion stand through the nylon sling 28, reducing the weight load on the blood transfusion set 1; the housing 2 is attracted to the iron frame of the infusion stand or hospital bed by the second magnet 29 and fixed by the Velcro strap 30;

[0044] Using transfusion set 1 to administer blood transfusions to patients, medical personnel control the blood flow rate of transfusion set 1 using the adjustment structure at the bottom of the housing 2. Rotating the handle 15 causes the rotating rod 12 to rotate, which in turn rotates the gear 13, driving the meshing face gear 14 to rotate, which in turn rotates the bidirectional screw 9. This causes the sliders 11 on both sides to slide towards each other, and the clamps 10 on both sides to slide towards each other along the through groove 7. When the clamps 10 move closer together, they squeeze the tubing of transfusion set 1, slowing down the blood flow rate. When the clamps 10 move further apart, they loosen the tubing of transfusion set 1, restoring the blood flow rate. A timer 5 is used for timing, and a buzzer 20 sounds to remind medical personnel to readjust after the designated time. This reduces the need for medical personnel to memorize the transfusion times of many different patients, facilitates the exchange of work and consistency of operation between different medical personnel, reduces the workload and difficulty of medical personnel, and improves their work efficiency.

[0045] During blood transfusion, a small amount of aggregates in the blood may clog the filter inside the dropper of transfusion set 1, hindering normal blood delivery and reducing the transfusion flow rate. When the filter inside the dropper of transfusion set 1 becomes clogged, the adjustment structure at the bottom of the housing 2 clamps and cuts off the flow at the bottom of the dropper, reducing the probability of saline flowing into the patient's body along transfusion set 1. Then, a syringe is connected to the fixed interface 26 of the aspiration vertical tube 24 to draw blood out of the dropper of transfusion set 1. Next, a new syringe is used to draw saline, and this syringe is connected to the fixed interface 26 of the backflushing interface 23. The saline in the syringe is then quickly injected into the dropper of transfusion set 1 through the tubing 25 and the backflushing interface 23. After the saline enters the balloon 32, the balloon 32 inflates. When the pressure generated by the inflation of the balloon 32 exceeds the elastic force of the elastic pore of the balloon 32, the saline is drawn out. Then, the elastic pore of the balloon 32 opens, and the saline solution inside the balloon 32 is quickly discharged into the drip tube of the transfusion set 1, forming multiple water flow impacts within the drip tube of the transfusion set 1. The saline solution impacts the filter screen from the bottom upwards, clearing the filter screen. At the same time, as the saline solution impacts upwards, it passes through the arc-shaped spring 31, causing the arc-shaped spring 31 to vibrate. The resulting vibration causes the filter screen to vibrate as well, improving the efficiency of separating the aggregates from the filter screen and allowing the aggregates on the filter screen to mix into the saline solution. Afterwards, the syringe used for fluid extraction draws out the saline solution and aggregates inside the filter screen through the fluid extraction vertical tube 24 and the flexible tube 25. After repeatedly injecting and extracting saline solution until there is no obvious blockage on the filter screen, the adjustment structure at the bottom of the shell 2 is opened to continue the transfusion operation. This facilitates medical personnel in clearing the filter screen blockage inside the drip tube of the transfusion set 1 and improves the stability of the transfusion rate of the transfusion set 1.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A transfusion device with adjustable transfusion speed, characterized in that: The device includes a blood transfusion set (1); a control unit is provided on the blood transfusion set (1); the control unit includes a housing (2) located on the outside of the blood transfusion set (1); a fixing groove (3) matching the drip tube of the blood transfusion set (1) is opened in the middle of the housing (2); the drip tube of the blood transfusion set (1) is slidably installed in the fixing groove (3); a cover plate (4) is bolted to the opening of the housing (2); an adjustment structure is provided at the bottom of the housing (2), and the adjustment structure is used to control and adjust the blood transfusion rate of the blood transfusion set (1); a timer (5) is fixed to the side of the cover plate (4) away from the housing (2). The adjustment structure includes cavities (6) on both sides of the bottom of the housing (2); a through groove (7) is provided between the two cavities (6), and the through groove (7) penetrates the bottom of the fixing groove (3); a base (8) is fixedly connected to the middle of the side of the cavity (6) away from the fixing groove (3); a bidirectional screw (9) is rotatably installed between the two bases (8); a clamping block (10) is slidably installed inside the through groove (7); a slider (11) is fixedly connected to the side of the clamping block (10) away from the fixing groove (3); the bidirectional screw (9) penetrates the slider (11), and bidirectional The screw (9) is threadedly engaged with the slider (11); a rotating rod (12) is rotatably mounted on the top surface of the insert (8) on one side; a gear (13) is fixedly connected to one end of the rotating rod (12); a face gear (14) is fixedly connected to the outer ring of the end of the bidirectional screw (9) near the gear (13); the face gear (14) meshes with the gear (13); a rotating handle (15) is rotatably mounted on the cover plate (4) at the position of the rotating rod (12); the rotating handle (15) is connected to the other end of the rotating rod (12); an annular angle scale line is opened on the cover plate (4) at the outer ring of the rotating handle; The blood transfusion set (1) has a filter screen inside the drip tube; the bottom of the drip tube of the blood transfusion set (1) is connected to a backflushing port (23); the drip tube of the blood transfusion set (1) is fixed with a suction vertical tube (24); the suction vertical tube (24) passes through the top of the drip tube of the blood transfusion set (1), and the bottom end of the suction vertical tube (24) extends into the bottom of the inner side of the filter screen; both the backflushing port (23) and the suction vertical tube (24) are connected to a flexible tube (25); the end of the flexible tube (25) away from the blood transfusion set (1) is connected to a fixed port ( 26); both sides of the housing (2) are provided with slots (27); the fixed interface (26) is located inside the slot (27); multiple arc-shaped spring pieces (31) are fixedly connected around the bottom outer ring of the filter screen of the blood transfusion set (1), and the outer wall of the arc-shaped spring pieces (31) slides and engages with the inner wall of the drip tube of the blood transfusion set (1); multiple balloons (32) are fixedly connected in the middle of a hose (25) that connects to the backflow interface (23), and an elastic hole is provided at the end of the balloon (32) near the backflow interface (23); When using the transfusion set (1) to transfuse blood to a patient, the fixing groove (3) on the housing (2) of the control unit is attached to the outside of the drip tube of the transfusion set (1). Medical staff use the adjustment structure to control the transfusion flow rate of the transfusion set (1). After the adjustment is completed, the timer (5) is used to keep track of the time and remind the medical staff to readjust after the specified time. When adjusting using the adjustment structure, the medical staff rotates the handle (15), which drives the rotating rod (12) to rotate, which drives the gear (13) to rotate, which drives the meshing face gear (14) to rotate, which drives the bidirectional screw (9) to rotate, which drives the sliders (11) on both sides to slide towards each other, which drives the clamping blocks (10) on both sides to slide towards each other along the through groove (7). With the help of the angle scale, the sliding distance of the clamping blocks 10 on both sides is accurately controlled, and the clamping degree of the clamping blocks (10) on the blood transfusion set (1) is accurately controlled. When the clamping blocks (10) on both sides are close together, they squeeze the blood transfusion set (1) and slow down the blood transfusion flow rate of the blood transfusion set (1). When the medical staff rotates the handle (15) in the opposite direction, the clamping blocks (10) on both sides move away from each other, which loosens the blood transfusion set (1) and restores the blood transfusion flow rate of the blood transfusion set (1). Thus, the blood transfusion flow rate of the blood transfusion set (1) is adjusted and controlled. When the filter inside the dropper of the blood transfusion set (1) becomes clogged, the adjustment structure at the bottom of the housing (2) is used to clamp and cut off the flow of the tubing at the bottom of the dropper of the blood transfusion set (1), reducing the probability of saline flowing into the patient's body along the blood transfusion set (1); then, a syringe is connected to the fixed interface (26) of the connecting suction vertical tube (24), and the blood inside the dropper of the blood transfusion set (1) is drawn out using the syringe; then, a new syringe is used to draw out saline, and the syringe is connected to the fixed interface (26) of the connecting backflushing interface (23), and the saline in the syringe is quickly injected from the bottom of the dropper of the blood transfusion set (1) through the tubing (25) and the backflushing interface (23). After the saline enters the balloon (32), the balloon (32) inflates. When the pressure generated by the inflation of the balloon (32) is greater than the elastic force of the elastic hole of the balloon (32), the elastic hole of the balloon (32) opens, and the saline inside the balloon (32) is released. The saline solution is quickly pumped into the drip tube of the blood transfusion set (1), forming multiple water flow impacts in the drip tube of the blood transfusion set (1); the saline solution impacts the filter screen from the bottom upwards, clearing the filter screen. At the same time, when the saline solution impacts upwards, it passes through the arc-shaped spring (31), causing the arc-shaped spring (31) to vibrate. The resulting vibration causes the filter screen to vibrate as well, improving the efficiency of separating the aggregates on the filter screen from the filter screen, so that the aggregates on the filter screen are mixed into the saline solution; then, the syringe used for liquid extraction passes through the liquid extraction vertical tube (24) and the tubing (25) to extract the saline solution and aggregates inside the filter screen together; after repeatedly injecting and extracting saline solution until there is no obvious blockage on the filter screen, the adjustment structure at the bottom of the shell (2) is opened to continue the blood transfusion work; thus, it is convenient for medical personnel to clear the filter screen blockage inside the drip tube of the blood transfusion set (1) and improve the stability of the blood transfusion rate of the blood transfusion set (1).

2. The transfusion device with adjustable transfusion speed according to claim 1, characterized in that: The handle (15) has a fixing hole (16) at one end near the rod (12); the rod (12) has multiple grooves around its outer ring at one end near the handle (15); a rubber fastening ring (17) is fitted inside the groove of the outer ring of the rod (12); the outer wall of the rubber fastening ring (17) slides with the inner wall of the fixing hole (16).

3. The blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: A pair of guide slides (18) are fixedly connected to the side of the cavity (6) away from the shell (2); a connecting block (19) is slidably installed inside the guide slide (18); the connecting block (19) is fixedly connected to the clamping block (10).

4. The blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: A buzzer (20) is fixed to the side of the cover plate (4) away from the housing (2); the buzzer (20) is electrically connected to the timer (5).

5. The blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: Multiple No. 1 magnets (21) are fixed to one side of the cover plates (4) on both sides; a fixing band (22) is adsorbed between the No. 1 magnets (21) on both sides; the two ends of the fixing band (22) are made of magnetic material, and the middle part of the fixing band (22) is made of elastic material.

6. The blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: The top of the housing (2) is also provided with an adjustment structure, which is used to control the blood transfusion rate at the top of the drip tube of the blood transfusion set (1).

7. A blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: The top of the housing (2) is fixed with a nylon sling (28).

8. The blood transfusion set with adjustable transfusion rate according to claim 1, characterized in that: A second magnet (29) is fixedly attached to the side of the housing (2) away from the cover plate (4), and a concave surface is provided on the side of the second magnet (29) away from the housing (2); multiple pairs of Velcro straps (30) are evenly fixed to both sides of the second magnet (29).

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