CN113694294B - An automatic pressure-regulating intraoperative autologous blood transfusion device - Google Patents

Abstract

The invention discloses an automatic pressure regulating type intraoperative autologous blood back transfusion device, which comprises a box body and is characterized in that: the automatic blood loss control device is characterized in that an induction mechanism is arranged in the box body, a pressure adjusting mechanism is arranged at the upper end of the box body, a liquid spraying mechanism is arranged in the box body, a proportioning mechanism is arranged outside the box body, the induction mechanism is connected with the liquid spraying mechanism in a matched mode, the induction mechanism is connected with a pipeline of the proportioning mechanism, the induction mechanism is connected with the pressure adjusting mechanism in a pipeline mode, a power supply is fixedly connected to the upper end of the box body, the induction mechanism comprises a motor which is fixedly connected with the box body, the motor is electrically connected with the power supply, a central shaft is fixedly connected to an output shaft of the motor, a plurality of groups of protruding blocks are arranged at the outer end of the central shaft, and a disc is movably connected inside the box body.

Description

An automatic pressure-regulating intraoperative autologous blood transfusion device

Technical field

The invention relates to the technical field of surgery, specifically an automatic pressure-regulating intraoperative autologous blood reinfusion device.

Background technique

Bleeding or even massive bleeding during surgery is one of the common risks of surgical treatment and is a serious threat to the life safety of surgical patients. When this happens, the most important thing is to promptly and adequately transfuse the bleeding patient with blood. To supplement the loss of blood, due to the scarcity of blood resources, sometimes it cannot meet the blood needs of various medical institutions during operations, so it is necessary to collect the patient's autologous blood for reinfusion. The methods of autologous blood reinfusion include pre-stored autologous blood transfusion, dilution Autologous blood transfusion and salvage autologous blood transfusion. At present, salvage autologous blood transfusion is mainly used for intraoperative hemorrhage. That is, using blood recovery machines and other equipment to collect, filter, separate, clean and purify the blood lost during the patient's surgery, and then inject it into the patient's body. , this not only solves the problem of blood source and the unfavorable factors of allogeneic blood transfusion, but also greatly reduces the social cost. In this process, the non-contaminated blood in the patient's body cavity is first collected and stored in a special blood recovery reservoir. Anticoagulant is added at a certain proportion and speed to prevent blood coagulation. At the same time, blood needs to be transfused back to the patient according to the patient's blood loss. However, the patient's blood loss rate changes at any time, and the amount of anticoagulant added needs to be adjusted in real time according to the patient's blood loss rate. and reinfusion speed. Therefore, it is necessary to design an automatic pressure-regulating intraoperative autologous blood reinfusion device that is highly practical and can adjust the amount of anticoagulant and the reinfusion speed in real time according to the patient's blood loss rate.

Contents of the invention

The object of the present invention is to provide an automatic pressure-regulating intraoperative autologous blood transfusion device to solve the problems raised in the above background technology.

In order to solve the above technical problems, the present invention provides the following technical solution: an automatic pressure-regulating intraoperative autologous blood return transfusion device, including a box body, characterized in that: an induction mechanism is provided inside the box body, and the box body A pressure regulating mechanism is provided at the upper end of the box, a liquid spraying mechanism is provided inside the box, and a proportioning mechanism is provided outside the box. The sensing mechanism and the liquid spraying mechanism are cooperatively connected, and the sensing mechanism and the proportioning mechanism are The mechanism is connected with pipelines, and the sensing mechanism is connected with the pressure regulating mechanism via pipelines.

According to the above technical solution, the upper end of the box is fixedly connected to a power supply, the induction mechanism includes a motor, the motor is fixedly connected to the box, the motor is electrically connected to the power supply, and the output shaft of the motor is fixedly connected to a central shaft, the outer end of the central shaft is provided with multiple sets of convex blocks, the interior of the box is movably connected with a disc, the interior of the disc is provided with multiple sets of concave blocks, and the multiple sets of concave blocks and convex blocks With the matching connection, the outer circle of the disk is fixedly connected with multiple sets of blades, the downstream pipe of the box is connected to a blood pump, a bracket is provided on the side of the box, and a right hanging bottle is fixedly connected to the upper end of the bracket, so The blood pump is connected to the right hanging bottle pipe, the right hanging bottle is connected to the human body pipe, the box is connected to the human body pipe, the middle pipe between the box and the human body is provided with a filter, and the right side of the box The pipeline is connected with a negative pressure pump.

According to the above technical solution, an inner cavity is provided inside the blade, a compression spring is fixedly connected to the inside of the inner cavity, and a piston is fixedly connected to the other end of the compression spring. The pressure adjustment mechanism includes a resistor, and the resistor Fixedly connected to the box, a guide rail is provided inside the resistor, a stopper is fixedly connected to the right end of the resistor, an elastic bag is fixedly connected to the left end of the stopper, and an insulator is fixedly connected to the left end of the elastic bag. The left end of the insulator is fixedly connected with a slider, the slider is cooperatively connected to the guide rail, the left end of the resistor is electrically connected to the power supply, the upper end of the slider is electrically connected to the negative pressure pump, and the inner cavity is connected to the elastic bag pipe connect.

According to the above technical solution, the liquid spraying mechanism includes a liquid tank, the liquid tank is fixedly connected to the tank body, a downstream pipeline of the liquid tank is connected to a liquid pump, and a liquid chamber is provided inside the central axis. The pump is connected to the liquid chamber pipeline. A through hole is provided in the middle of the liquid chamber and the bump. A spring is fixedly connected to the inside of the through hole. The other end of the spring is fixedly connected to a one-way ball. The bump is A nozzle is connected to the rear end pipe, a drawstring is fixedly connected to the intermediate pipe between the bump and the nozzle, and a sealing ball is fixedly connected to the other end of the drawstring.

According to the above technical solution, the proportioning mechanism includes a proportioning box, the proportioning box is fixedly connected to the bracket, a plurality of groups of blood boxes are provided inside the proportioning box, and the insides of the multiple groups of blood boxes are all fixedly connected. There is a tension spring, and the other end of the tension spring is fixedly connected to a liquid bag. A partition is provided inside the liquid bag, and a middle hole is provided in the middle of the partition. The partition divides the liquid bag into an upper chamber and an upper chamber. In the lower chamber, multiple groups of liquid sacs are connected with pipes at the beginning and end. The lower cavity of the liquid sac is connected with the inner cavity pipes. The right hanging bottle is connected with the upper end pipes of multiple groups of blood boxes. The human body is connected with the upper end pipes of multiple groups of blood boxes. Lower pipe connection.

According to the above technical solution, a push rod is fixedly connected to the right end of the filter, an electrical box is fixedly connected to the upper end of the box, a switch is provided inside the electrical box, the switch is electrically connected to the motor, and the bracket A left hanging bottle is fixedly connected to the upper end of the left hanging bottle, a connecting box is fixedly connected in the middle of the left hanging bottle and the right hanging bottle, a left cavity is provided on the left side of the connecting box, and an elastic rope is fixedly connected to the inside of the left cavity. The other end of the elastic rope is fixedly connected with a push block, and the left cavity is connected to the inner cavity pipeline.

According to the above technical solution, the upper end of the filter screen is connected to the liquid tank pipe, the middle pipe of the filter screen and the liquid tank is fixedly connected with an elastic cord, and the other end of the elastic cord is fixedly connected with an air bag, and the air bag is connected to the liquid tank. The upper lumen of the sac is connected to the duct.

According to the above technical solution, the box body is made of stainless steel.

According to the above technical solution, the surface of the box is evenly coated with a polyurethane lubricating coating.

According to the above technical solution, the liquid bag is made of elastic rubber material.

Compared with the prior art, the beneficial effects achieved by the present invention are: the present invention, by being provided with a sensing mechanism, can conveniently detect the amount of blood loss in the human body, and can balance the negative pressure through the pressure adjustment mechanism. When the blood loss is too large, In the case of excessive blood loss, reduce the size of the negative pressure. In the case of small blood loss, increase the size of the negative pressure to achieve the purpose of regulating the body's blood volume and prevent excessive blood loss. At the same time, it can be adjusted according to the amount of blood loss in the human body. , the spray mechanism is used to spray anticoagulant into the blood to prevent blood coagulation, so as to spray more when there is more blood and less when there is less blood. The amount of blood delivered to the human body can be controlled through the proportioning mechanism. And linked with the sensing mechanism, when the human body loses too much blood, a large amount of blood is replenished. When the human body loses less blood, the amount of blood replenishment is smaller, thereby achieving the purpose of automatically controlling the amount of blood replenishment. At the same time, when the blood pumping line is blocked , you can switch to pre-stored blood for human infusion to achieve the purpose of ensuring human life safety.

Description of the drawings

The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. In the attached picture:

Figure 1 is a schematic diagram of the overall structure of the present invention;

Figure 2 is a schematic structural diagram of the overall front cross-section of the present invention;

Figure 3 is a schematic diagram of the hydraulic connection of the liquid spray mechanism of the present invention;

Figure 4 is a schematic diagram of the partial structure of position A of the present invention;

Figure 5 is a schematic diagram of the partial structure of position B of the present invention;

Figure 6 is a schematic diagram of the partial structure of position C of the present invention;

Figure 7 is a schematic diagram of the partial structure at D of the present invention;

Figure 8 is a schematic diagram of the partial structure at E of the present invention;

In the picture: 1. Box; 2. Liquid tank; 3. Blood pump; 4. Right hanging bottle; 5. Left hanging bottle; 6. Bracket; 7. Proportioning box; 8. Liquid pump; 9. Filter; 10. Central axis; 11. Liquid chamber; 12. Bump; 13. Disc; 14. Blade; 15. Inner cavity; 16. Piston; 17. Compression spring; 18. Through hole; 19. One-way ball; 20 , spring; 21. Left chamber; 22. Blood tank; 23. Tension spring; 24. Liquid bag; 25. Negative pressure pump; 27. Switch; 28. Electrical box; 29. Connection box; 30. Elastic rope; 31. Push block; 32. Nozzle; 33. Pull rope; 34. Sealing ball; 35. Concave block; 36. Power supply; 37. Resistor; 38. Stopper; 39. Elastic bag; 40. Insulator; 41. Slider; 42 , guide rail; 43. partition; 44. middle hole; 45. elastic rope; 46. air bag; 47. ejector rod.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

Please refer to Figures 1-8. The present invention provides a technical solution: an automatic pressure-regulating intraoperative autologous blood return transfusion device, including a box 1, which is characterized in that: a sensing mechanism is provided inside the box 1. A pressure regulating mechanism is provided at the upper end, a liquid spraying mechanism is provided inside the box 1, and a proportioning mechanism is provided outside the box 1. The sensing mechanism and the liquid spraying mechanism are cooperatively connected, and the sensing mechanism and the proportioning mechanism are connected by pipes. The sensing mechanism is connected with the matching mechanism. The pressure adjustment mechanism is connected to the pipeline. By setting up a sensing mechanism, the amount of blood loss in the human body can be conveniently detected, and the negative pressure can be balanced through the pressure adjustment mechanism. When the blood loss is too much, the negative pressure can be reduced and the amount of blood loss can be reduced. When the amount is small, increase the negative pressure to achieve the purpose of regulating human blood volume and prevent excessive blood loss. At the same time, according to the amount of human blood loss, the spray mechanism can be used to spray anticoagulant into the blood. Prevent blood coagulation and achieve the purpose of spraying more when there is more blood and less when there is less blood. The amount of blood delivered to the human body can be controlled through the proportioning mechanism and linked with the sensing mechanism to prevent excessive blood loss from the human body. When the human body loses less blood, the amount of blood replenishment is smaller, thereby achieving the purpose of automatically controlling the amount of blood replenishment. At the same time, when the blood pumping line is blocked, the pre-stored blood can be switched to the human body for infusion, achieving the goal of The purpose of ensuring the safety of human life;

The upper end of the box 1 is fixedly connected to a power supply 36. The induction mechanism includes a motor. The motor is fixedly connected to the box 1. The motor is electrically connected to the power supply 36. The output shaft of the motor is fixedly connected to a central shaft 10. The outer end of the central shaft 10 is provided with a There are multiple sets of protrusions 12, and a disc 13 is movably connected to the inside of the box 1. There are multiple sets of concave blocks 35 inside the disc 13. The multiple sets of concave blocks 35 are cooperatively connected with the protrusions 12, and the outer circle of the disc 13 is fixed. Multiple sets of blades 14 are connected. The downstream pipe of the box 1 is connected to a blood pump 3. A bracket 6 is provided on the side of the box 1. The upper end of the bracket 6 is fixedly connected to a right hanging bottle 4. The blood pump 3 and the right hanging bottle 4 pipes Connection, the right hanging bottle 4 is connected to the human body pipeline, the box 1 is connected to the human body pipeline, the middle pipeline between the box 1 and the human body is provided with a filter 9, and the right side pipeline of the box 1 is connected to a negative pressure pump 25. During the operation , under the action of the negative pressure pump 25, the waste blood in the human body passes through the pipe, filters out some impurities through the filter, and then enters the box 1. At the same time, driven by the motor, the central shaft 10 begins to rotate and passes through the bumps 12 cooperates with the concave block 35 to drive the disk 13 to rotate, thereby driving the blade 14 to rotate, and stirs the blood entering the box 1 to prevent it from coagulating, and then through the blood pump 3, the blood in the box 1 is The blood is pumped into the right hanging bottle 4 and returned to the human body, thereby achieving the purpose of returning waste blood during surgery;

The blade 14 is provided with an inner cavity 15 inside, and a compression spring 17 is fixedly connected to the inside of the inner cavity 15. The other end of the compression spring 17 is fixedly connected to a piston 16. The pressure adjustment mechanism includes a resistor 37, and the resistor 37 is fixedly connected to the box 1. A guide rail 42 is provided inside the resistor 37. The right end of the resistor 37 is fixedly connected to a stopper 38. The left end of the stopper 38 is fixedly connected to an elastic bag 39. The left end of the elastic bag 39 is fixedly connected to an insulator 40. The left end of the insulator 40 is fixedly connected to The slider 41 is cooperatively connected with the guide rail 42. The left end of the resistor 37 is electrically connected with the power supply 36. The upper end of the slider 41 is electrically connected with the negative pressure pump 25. The inner cavity 15 is connected with the elastic bag 39 through pipelines. The inner cavity 15 and The elastic bags 39 are equipped with hydraulic oil. As the blades 14 rotate, the piston 16 moves toward the distal end due to centrifugal force, causing the pressure inside the inner cavity 15 to become smaller. The hydraulic oil in the elastic bag 39 enters through the pipe. In the inner cavity 15, as the hydraulic oil in the elastic bag 39 decreases, the elastic bag 39 begins to shrink, and drives the slider 41 through the insulator 40 to move to the left in the guide rail 42, so that the length of the conduction of the resistor 37 becomes shorter. The resistance value becomes smaller, so the negative pressure output by the negative pressure pump 25 becomes larger. Therefore, when the blade 14 rotates faster, it means that there is less blood inside the box 1. At this time, the pressure output by the negative pressure pump 25 increases. When the blade 14 rotates slowly, it means that there is more blood inside the box 1. At this time, the pressure output by the negative pressure pump 25 decreases, thereby reducing the negative pressure when the blood loss is too much. In rare cases, increase the negative pressure to achieve the purpose of regulating human blood volume and prevent excessive blood loss;

The liquid spraying mechanism includes a liquid tank 2. The liquid tank 2 is fixedly connected to the box body 1. A liquid pump 8 is connected to the downstream pipeline of the liquid tank 2. A liquid chamber 11 is provided inside the central shaft 10. The liquid pump 8 is connected to the liquid chamber 11 through pipelines. , a through hole 18 is provided in the middle of the liquid chamber 11 and the bump 12, a spring 20 is fixedly connected to the inside of the through hole 18, a one-way ball 19 is fixedly connected to the other end of the spring 20, and a nozzle is connected to the rear end pipe of the bump 12 32. A pull cord 33 is fixedly connected in the middle pipe between the bump 12 and the nozzle 32. The other end of the pull cord 33 is fixedly connected with a sealing ball 34. When the blade 14 stirs the blood, the blade 14 is resisted by the blood, thereby causing the disc to The rotation of 13 is also affected by resistance. When the disc 13 is subjected to resistance, a greater resistance is also generated between the convex block 12 and the concave block 35. Because the convex block 12 is made of soft material and has an anticoagulant inside, it is Under the action of large resistance, the convex block 12 sometimes cannot drive the disc 13 to move through the concave block 35, resulting in a rotation difference between the central axis 10 and the disc 13, which in turn causes the convex block 12 to be squeezed by the concave block 35. When the block 12 is extruded, the anticoagulant inside the block 12 pushes away the sealing ball 34 and enters the blood through the nozzle 32, thereby delaying blood coagulation. After the anticoagulant inside the bump 12 is squeezed out, The pressure becomes smaller. After the squeeze is eliminated, the anticoagulant in the liquid chamber 11 pushes away the one-way ball 19 and replenishes the anticoagulant to the bump 12. At the same time, the anticoagulant in the liquid chamber 11 circulates between the liquid tank 2 and the liquid It can be replenished at any time under the action of the pump 8, and the more blood inside the box 1, the greater the resistance the disk 13 receives, and the more times the bump 12 is squeezed, so that the anticoagulant can be sprayed according to the amount of human bleeding. The purpose is to spray more when there is more blood and less when there is less blood;

The proportioning mechanism includes a proportioning box 7, which is fixedly connected to the bracket 6. A plurality of groups of blood boxes 22 are provided inside the proportioning box 7, and a tension spring 23 is fixedly connected to the interior of the multiple groups of blood boxes 22. The other end of 23 is fixedly connected with a liquid bag 24. A partition 43 is provided inside the liquid bag 24. A middle hole 44 is provided in the middle of the partition 43. The partition 43 divides the liquid bag 24 into an upper chamber and a lower chamber. Multiple groups of liquids are provided. The first and last pipes of the bag 24 are connected, the lower chamber of the liquid bag 24 is connected with the inner cavity 15 by pipes, the right hanging bottle 4 is connected with the upper end pipes of the multiple groups of blood tanks 22, and the human body is connected with the lower end pipes of the multiple groups of blood tanks 22. When the box 1 When there is no blood in the blood tank, it means that the human body has not lost blood at this time. At this time, all the gas is stored in the liquid bag 24. Driven by the gas, the liquid bag 24 moves upward and blocks the entrance of the upper end of the blood tank 22, so the right hanging bottle 4 The blood in the tank cannot enter the human body through the blood tank 22. When there is blood in the tank 1, it means that the human body begins to lose blood. Because the blade 14 is slowed down by the blood resistance, the piston 16 starts to move toward the proximal end, and the inner cavity 15 The hydraulic oil in the liquid bag 24 is squeezed into the liquid bag 24, because the hydraulic oil and the gas in the liquid bag 24 are incompatible, as the hydraulic oil entering the liquid bag 24 increases, the gas in the original liquid bag 24 will be squeezed out Due to the increase in liquid, the liquid sac 24 slowly moves downward and opens the pipe at the upper end of the blood tank 22. The blood in the right bottle 4 can enter the human body through the blood tank, because multiple groups of liquid sacs 24 are connected by pipes at the beginning and end. After each bladder 24 is filled with hydraulic oil, it will enter the next bladder 24. Therefore, as the blood loss of the human body increases, the amount of hydraulic oil entering the bladder 24 in the inner cavity 15 increases, and the number of bladders 24 filled with hydraulic oil also increases, so The number of blood tanks 22 that open the upper pipe also increases, so that through the right hanging bottle 4, the blood entering the human body through the blood tank 22 also increases, achieving a large amount of supplementary blood when the human body loses too much blood, and when the human body loses less blood. In this case, the amount of blood replenishment is less, thus achieving the purpose of automatically controlling the amount of blood replenishment;

The right end of the filter 9 is fixedly connected with a push rod 47, the upper end of the box 1 is fixedly connected with an electrical box 28, a switch 27 is provided inside the electrical box 28, the switch 27 is electrically connected to the motor, and the upper end of the bracket 6 is fixedly connected with a left hanging Bottle 5, left bottle 5 and right bottle 4 are fixedly connected with a connection box 29 in the middle. A left cavity 21 is provided on the left side of the connection box 29. An elastic rope 30 is fixedly connected to the inside of the left cavity 21. The other part of the elastic rope 30 is fixedly connected to the bottle 5. One end is fixedly connected with a push block 31, and the left cavity 21 is connected to the inner cavity 15 by a pipeline. When the filter 9 is blocked, the filter 9 slowly bulges toward the right end due to the pressure of the blood on the left end and the suction of the negative pressure on the right end. , thereby driving the ejector pin 47 to move to the right. When the filter 9 bulges to a certain extent, the ejector pin 47 opens the switch 27, and the sensing mechanism stops working. At this time, a large amount of hydraulic oil in the inner cavity 15 enters the liquid bag 24, Make all the blood tanks 22 have unobstructed pipelines. At the same time, a large amount of hydraulic oil in the inner chamber 15 also enters the left chamber 21, pushing the push block 31 to move to the right. With the movement of the push block 31, the right hanging bottle 4 The pipeline is blocked, and the pipeline in the left hanging bottle 5 is opened. Because the left hanging bottle 5 stores pre-prepared blood, blood can be returned to the human body in a timely manner, thus achieving the goal when the front-end blood circuit is blocked. Switch the blood route to ensure the safety of human life;

The upper end of the filter screen 9 is connected to the liquid tank 2 pipe. The middle pipe of the filter screen 9 and the liquid tank 2 is fixedly connected with an elastic cord 45. The other end of the elastic cord 45 is fixedly connected with an air bag 46. The air bag 46 is connected to the upper chamber of the liquid bag 24. pipeline connection, when the induction mechanism stops working, a large amount of hydraulic oil in the inner cavity 15 enters the liquid bag 24, and squeezes the gas in the original liquid bag 24 into the air bag 46. The air bag 46 expands due to the increase in gas, and the air bag 46 expands due to the increase in gas. The density gradually becomes smaller, and under the tension of the elastic cord 45, the lower pipe is opened, so that the anticoagulant in the liquid tank 2 enters the filter 9 and slowly softens the blood to assist in clearing blood blockage;

The box 1 is made of stainless steel, which facilitates improving the anti-corrosion performance of the box 1 and extending its service life;

The surface of the box 1 is evenly coated with a polyurethane lubricating coating to improve the anti-corrosion performance of the box 1 and extend its service life;

The liquid bladder 24 is made of elastic rubber, so that the liquid bladder 24 has a high elastic deformation ability, making it more flexible to use.

It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that these entities or operations are mutually exclusive. any such actual relationship or sequence exists between them. Furthermore, the terms "comprises," "comprises," or any other variations thereof are intended to cover a non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements, but also those not expressly listed other elements, or elements inherent to the process, method, article or equipment.

Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, it is still The technical solutions described in the foregoing embodiments may be modified, or some of the technical features may be equivalently replaced. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims (6)

1. Automatic pressure regulating formula intraoperative autologous blood feedback device, including box (1), its characterized in that: the automatic water dispenser is characterized in that an induction mechanism is arranged in the box body (1), a pressure adjusting mechanism is arranged at the upper end of the box body (1), a liquid spraying mechanism is arranged in the box body (1), a proportioning mechanism is arranged outside the box body (1), the induction mechanism is connected with the liquid spraying mechanism in a matched mode, the induction mechanism is connected with a proportioning mechanism through a pipeline, and the induction mechanism is connected with the pressure adjusting mechanism through a pipeline;

the induction mechanism comprises a motor, the motor is fixedly connected with the box body (1), the motor is electrically connected with the power supply (36), an output shaft of the motor is fixedly connected with a central shaft (10), a plurality of groups of lugs (12) are arranged at the outer end of the central shaft (10), a disc (13) is movably connected inside the box body (1), a plurality of groups of concave blocks (35) are arranged inside the disc (13), a plurality of groups of concave blocks (35) are connected with the lugs (12) in a matched mode, a plurality of groups of blades (14) are fixedly connected with the outer circle of the disc (13), a blood pump (3) is connected to a downstream pipeline of the box body (1), a support (6) is arranged on the side face of the box body (1), a right hanging bottle (4) is fixedly connected to the upper end of the support (6), the blood pump (3) is connected with a right hanging bottle (4) in a pipeline, the right hanging bottle (4) is connected with a human body pipeline, the box body (1) is connected with the human body pipeline, and a filter screen (25) is connected with the middle of the box body (1) in a pipeline, and the middle of the box body (9) is connected with the negative pressure pipeline (25);

the inside of blade (14) is provided with inner chamber (15), the inside fixedly connected with pressure spring (17) of inner chamber (15), the other end fixedly connected with piston (16) of pressure spring (17), pressure adjustment mechanism includes resistance (37), resistance (37) and box (1) fixed connection, the inside of resistance (37) is provided with guide rail (42), the right-hand member fixedly connected with dog (38) of resistance (37), the left end fixedly connected with elastic bag (39) of dog (38), the left end fixedly connected with insulator (40) of elastic bag (39), the left end fixedly connected with slider (41) of insulator (40), slider (41) are connected with guide rail (42) cooperation, the left end and the power (36) of resistance (37) are electric, the upper end and the negative pressure pump (25) of slider (41) are electric, inner chamber (15) and elastic bag (39) pipe connection;

the liquid spraying mechanism comprises a liquid box (2), the liquid box (2) is fixedly connected with a box body (1), a liquid pump (8) is connected to a downstream pipeline of the liquid box (2), a liquid cavity (11) is formed in a central shaft (10), the liquid pump (8) is connected with the liquid cavity (11) in a pipeline manner, a through hole (18) is formed in the middle of the liquid cavity (11) and a lug (12), a spring (20) is fixedly connected to the inside of the through hole (18), a one-way ball (19) is fixedly connected to the other end of the spring (20), a spray head (32) is connected to a rear end pipeline of the lug (12), a pull rope (33) is fixedly connected to the middle pipeline of the lug (12) and the spray head (32), and a sealing ball (34) is fixedly connected to the other end of the pull rope (33).

The proportioning mechanism comprises a proportioning box (7), the proportioning box (7) is fixedly connected with a support (6), a plurality of groups of blood boxes (22) are arranged in the proportioning box (7), a plurality of groups of blood boxes (22) are fixedly connected with tension springs (23) in the blood boxes, liquid bags (24) are fixedly connected with the other ends of the tension springs (23), partition plates (43) are arranged in the liquid bags (24), middle holes (44) are formed in the middle of the partition plates (43), the liquid bags (24) are divided into upper cavities and lower cavities by the partition plates (43), the plurality of groups of liquid bags (24) are connected in a head-to-tail pipeline mode, the lower cavities of the liquid bags (24) are connected with inner cavities (15) in a pipeline mode, and a right hanging bottle (4) is connected with the upper ends of the plurality of groups of blood boxes (22) in a pipeline mode, and a human body is connected with the lower ends of the plurality of groups of blood boxes (22) in a pipeline mode.

2. An automatic pressure regulating intraoperative autologous blood return device as claimed in claim 1, wherein: the utility model discloses a filter screen, including filter screen (9), right-hand member fixedly connected with ejector pin (47), the upper end fixedly connected with electrical box (28) of box (1), the inside of electrical box (28) is provided with switch (27), switch (27) and motor electricity are connected, the upper end fixedly connected with left bottle (5) of support (6), the middle fixedly connected with link box (29) of left bottle (5) and right bottle (4), the left side of link box (29) is provided with left chamber (21), the inside fixedly connected with elastic rope (30) of left chamber (21), the other end fixedly connected with ejector pad (31) of elastic rope (30), left chamber (21) and inner chamber (15) pipe connection.

3. An automatic pressure regulating intraoperative autologous blood back transfusion device as defined in claim 2, wherein: the upper end of the filter screen (9) is connected with the liquid tank (2) through a pipeline, an elastic rope (45) is fixedly connected with the middle pipeline of the filter screen (9) and the liquid tank (2), an air bag (46) is fixedly connected with the other end of the elastic rope (45), and the air bag (46) is connected with the upper cavity pipeline of the liquid bag (24).

4. An automatic pressure regulating intraoperative autologous blood return device in accordance with claim 3, wherein: the box body (1) is made of stainless steel.

5. An automatic pressure regulating intraoperative autologous blood return device in accordance with claim 4, wherein: the surface of the box body (1) is uniformly coated with a polyurethane lubricating coating.

6. An automatic pressure regulating intraoperative autologous blood return device in accordance with claim 5, wherein: the liquid bag (24) is made of elastic rubber.