Pressurizing bag for blood transfusion and transfusion

Abstract

The utility model discloses a blood transfusion and transfusion pressurization bag which comprises a pressurization bag body, a pressurization pipe, an electric inflation pump, a pressure limiting assembly and an adjusting assembly, the top of the pressurization bag body is connected with the adjusting assembly, an air pressure sensor is arranged in the pressurization bag body, the pressurization bag body is provided with an interlayer, and an alarm is arranged at the top of the adjusting assembly. One end of the pressurizing pipe is connected with the bottom of the pressurizing bag body, the other end of the pressurizing pipe is connected with the electric inflating pump, a branch pipe is arranged on the pressurizing pipe, the branch pipe is connected with the pressure limiting assembly, and a pressure release valve is further arranged on the pressurizing pipe; the electric inflator pump has the advantages that the electric inflator pump can set an air pressure value and automatically finish an inflation process, manual operation is reduced, and efficiency and accuracy are improved; the pressure limiting assembly and the adjusting assembly are matched with each other and work when the air pressure value in the pressurizing bag body changes, so that the air pressure value is always kept at a set value.

Description

Technical Field

[0001] The utility model relates to the field of medical equipment, in particular to a blood transfusion and infusion pressurized bag. Background Art

[0002] During cardiovascular and cerebrovascular surgery, multiple arterial injections are often required at the same time. Arterial injections require high pressure from the syringe, so the blood transfusion bag often needs to be squeezed to keep the syringe at a certain pressure. The existing technology often inflates the pressurized bag by manually squeezing the ball, which is time-consuming, labor-intensive and inefficient. Moreover, when the pressure changes during use, it is necessary to frequently inflate to maintain a stable pressure, which not only wastes manpower but is also easily overlooked. Especially for critically ill patients, if the pressure change cannot be discovered by medical staff in time, it will affect the accuracy of the monitoring of central venous pressure and invasive arterial blood pressure (CVP, ABP) related data, which can easily lead to misjudgment. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing pressurized bags need to be manually squeezed and inflated, which is time-consuming and labor-intensive; at the same time, the air pressure value inside the pressurized bag cannot be kept stable all the time, affecting the accuracy of related data monitoring; in view of the above problem, a blood transfusion and infusion pressurized bag is proposed, including a pressurized bag body, a pressurized tube, an electric air pump, a pressure limiting component and an adjustment component, the top of the pressurized bag body is connected to the adjustment component, an air pressure sensor is provided inside the pressurized bag body, the pressurized bag body is provided with a interlayer, an alarm is provided on the top of the adjustment component, one end of the pressurized tube is connected to the bottom of the pressurized bag body, the other end of the pressurized tube is connected to the electric air pump, a branch pipe is provided on the pressurized tube, the branch pipe is connected to the pressure limiting component, and a pressure relief valve is also provided on the pressurized tube.

[0004] The technical solution of the utility model can limit the maximum air pressure value in the pressurized bag body by setting the structure of the pressure limiting component. When the air pressure value exceeds this value, the pressure limiting component will release part of the gas in time and reset, so that the internal air pressure is reduced and the set maximum air pressure value is maintained unchanged; by setting the structure of the regulating component, when the air pressure value in the pressurized bag body is reduced, part of the pressurized bag body will be squeezed and rolled up to be stored, so that its volume is reduced, and the air pressure value rises to maintain the set value unchanged; after use, the pressurized bag body can be completely rolled up and properly stored to avoid damage due to wear and tear and inability to continue to use; through the cooperation of the pressure limiting component and the regulating component, the air pressure value in the pressurized bag body can be stably maintained at the set value, the infusion bag can stably transport the medicine, and it is convenient to monitor human body related data through other equipment and ensure the accuracy of the data obtained.

[0005] Preferably, the pressurized tube extends into the pressurized bag body and extends upward to a certain height, and the extended portion is made of hard material. When the adjusting component is working or the pressurized bag body needs to be stored after the work is completed, the hard material at the bottom acts as a limit to prevent other structures from being squeezed and damaged.

[0006] Preferably, the air pressure sensor is arranged at a height lower than the height of the extended portion of the pressurized tube, so that the air pressure sensor will not be squeezed by the regulating component, thereby extending the service life of the air pressure sensor.

[0007] The preferred technical solution of the utility model is that the pressure limiting assembly includes a cylinder body, the cylinder body is connected to the branch pipe, the upper part of the inner wall of the cylinder body is provided with a first limiting ring, the bottom end of the inner wall of the cylinder body is provided with a second limiting ring, the piston and the push block are slidably connected between the first limiting ring and the second limiting ring, the push block is located below the piston, the push rod is threadedly connected to the second limiting ring, the upper end of the push rod is connected to the push block, a guide rod is provided at the bottom of the piston, the guide rod passes through the through holes on the push block and the push rod, the two ends of the pressure spring are respectively fitted with the lower surface of the piston and the upper surface of the push block, the guide rod is located in the middle of the pressure spring, and the cylinder body A vent hole is also provided on the top, and the adjustment component can limit the maximum air pressure value in the pressurized bag body. The distance between the push block and the piston can be adjusted by the push rod, thereby changing the compression amount of the pressure spring. At this time, the air pressure value at which the piston can be pushed up and slide outward also changes, thereby realizing that the maximum air pressure value in the pressurized bag body is adjustable and controllable. When the air pressure value is higher than this, the piston slides outward, and part of the gas in the pressurized bag body is released through the vent hole, and the pressure value drops to the maximum air pressure value, and then the pressure spring acts to reset it. Therefore, the air pressure value in the pressurized bag body can only be less than or equal to the set maximum air pressure value.

[0008] Preferably, a pressure sensor is provided on the lower surface of the first limiting ring. When the pressure sensor is under pressure, an indicator light comes on, and when the pressure sensor is not under pressure, the indicator light goes out. Initially, the push rod is rotated to the limit. At this time, the piston fits tightly with the first limiting ring, and the pressure spring is compressed to the limit. Gas is filled into the pressurized bag body through an electric air pump to maintain a certain air pressure value, and then the push rod is rotated to turn the indicator light off. The adjustment process is completed, and the air pressure value at this time is the maximum air pressure value.

[0009] Preferably, the air vent hole is flush with the lower surface of the first limiting ring. As long as the piston slides outward, part of the gas can be released through the air vent hole to adjust the internal air pressure. The air pressure in the pressurized bag will never be higher than the set maximum air pressure value.

[0010] Preferably, a signal receiving component of an air pressure sensor is provided inside the alarm. When the air pressure in the pressurized bag changes, the air pressure sensor sends a signal and the alarm works to remind medical staff to conduct an inspection.

[0011] For the optimization of the technical solution of the present utility model, the adjusting assembly includes a "C"-shaped frame with its opening facing downward. A hook ring is provided at the top of the "C"-shaped frame. Two extrusion shafts and a rotating shaft are all rotatably connected between the two side walls of the "C"-shaped frame. The rotating shaft is located above the extrusion shafts and is connected to the motor shaft of the motor. The motor is arranged on the side wall of the "C"-shaped frame. A fixed block is also provided between the two side walls of the "C"-shaped frame, and the fixed block is located between the extrusion shafts and the rotating shaft. When the air pressure value in the pressurizing bag body decreases due to the reduction of the liquid medicine in the infusion bag, the motor starts to work and drives the rotating shaft to rotate. During the rotation, part of the pressurizing bag body is rolled up by the rotating shaft, the volume of the pressurizing bag body decreases, and when the internal air pressure rises to the maximum air pressure value, the motor stops working. The motor is also turned on or off through the signal of the air pressure sensor.

[0012] For the optimization of the technical solution of the present utility model, the two extrusion shafts are parallel to each other and maintain a certain distance between them. The pressurizing bag body passes through between the two extrusion shafts. The two extrusion shafts rotate to squeeze the pressurizing bag body, reducing wear and facilitating rolling up and storage. At the same time, it can also squeeze the internal infusion bag so that there is no residual liquid medicine in the infusion bag, avoiding affecting the treatment effect.

[0013] The beneficial effects of the present utility model compared with the prior art are as follows:

[0014] 1. For the technical solution of the present utility model, by setting the structure of the pressure limiting assembly, the maximum air pressure value in the pressurizing bag body can be limited. When the air pressure value exceeds this value, the pressure limiting assembly will timely release part of the gas and reset, so that the internal air pressure decreases and maintains the set maximum air pressure value unchanged.

[0015] 2. For the technical solution of the present utility model, by setting the structure of the adjusting assembly, when the air pressure value in the pressurizing bag body decreases, it will squeeze and roll up part of the pressurizing bag body for storage, reducing its volume and making the air pressure value rise to maintain the set value unchanged. After use, the entire pressurizing bag body can be rolled up and properly stored to avoid being damaged due to wear and unable to be used continuously.

[0016] 3. For the technical solution of the present utility model, through the mutual cooperation of the pressure limiting assembly and the adjusting assembly, the air pressure value in the pressurizing bag body can be stably maintained at the set value unchanged, the infusion bag conveys the liquid medicine stably, which is convenient for monitoring relevant human body data through other devices and ensuring the accuracy of the obtained data. Description of the Drawings

[0017] Figure 1 It is a three-dimensional schematic diagram of a blood transfusion and infusion pressurizing bag;

[0018] Figure 2 It is a front view schematic diagram of a blood transfusion and infusion pressurizing bag;

[0019] Figure 3 It is a cross-sectional schematic diagram of a pressure limiting component of a blood transfusion and infusion pressurized bag;

[0020] Among them: pressurized bag body 1, air pressure sensor 11, pressurized pipe 2, pressure relief valve 21, branch pipe 22, electric air pump 3, pressure limiting component 4, cylinder 41, first limiting ring 42, air leakage hole 43, piston 44, guide rod 45, second limiting ring 46, pressure spring 47, push block 48, push rod 49, adjustment component 5, hook ring 51, extrusion shaft 52, fixing block 53, motor 54, rotating shaft 55, alarm 56. DETAILED DESCRIPTION

[0021] The following will be combined with the attached embodiment of the present utility model Figure 1-3 , the technical solutions in the embodiments of the utility model are described in detail. Example 1

[0022] like Figure 1-3 As shown, the utility model is a blood transfusion and infusion pressurized bag, comprising a pressurized bag body 1, a pressurized tube 2, an electric air pump 3, a pressure limiting component 4 and an adjusting component 5. The electric air pump 3 automatically inflates the air so that the internal air pressure of the pressurized bag body 1 reaches a set value, and the pressure limiting component 4 and the adjusting component 5 cooperate with each other to maintain a stable air pressure in the pressurized bag body 1.

[0023] The pressurized bag body 1 is provided with an interlayer for placing an infusion bag or a blood transfusion bag. An air pressure sensor 11 is provided inside the pressurized bag body 1 . The air pressure sensor 11 is arranged near the bottom of the pressurized bag body 1 .

[0024] The pressurizing tube 2 is connected to the bottom of the pressurizing bag body 1, extends into the interior of the pressurizing bag body 1 and extends upward to a certain height. The extended portion is made of hard material. The setting height of the air pressure sensor 11 is lower than the top of this extended portion. Therefore, when the pressurizing bag body 1 is rolled up and stored, the air pressure sensor 11 is protected and not easily damaged.

[0025] The other end of the pressurizing tube 2 is connected to the electric air pump 3, which can inflate the interior of the pressurizing bag 1 through the pressurizing tube 2 to achieve the desired air pressure inside. The specific air pressure value can be set by the electric air pump 3. When the set air pressure value is reached, the electric air pump 3 automatically shuts down and stops working.

[0026] The pressurizing tube 2 is also provided with a pressure relief valve 21. When the infusion or blood transfusion is completed and the pressurizing bag needs to be stored, the pressure relief valve 21 is opened to release the gas inside, and then the bag can be stored.

[0027] For some critically ill patients, other relevant data need to be monitored during infusion or blood transfusion. The air pressure standard of 300 mmHg can accurately reflect the central venous pressure and invasive arterial blood pressure (CVP, ABP). Therefore, it is necessary to stably maintain the pressure inside the pressurized bag 1 at 300 mmHg.

[0028] With the cooperation of the pressure limiting component 4 and the regulating component 5, the interior of the pressurized bag body 1 can stably maintain 300mmhg. When the air pressure value is lower than this value, the two will promptly issue an alarm and make relevant adjustments to stabilize the air pressure.

[0029] like Figure 1-2 As shown, the pressure limiting assembly 4 is connected to the pressurized pipe 2 through the branch pipe 22. The pressure limiting assembly 4 includes a cylinder 41. A first limiting ring 42 is provided on the upper part of the inner wall of the cylinder 41, and a second limiting ring 46 is provided on the bottom end of the inner wall of the cylinder. The piston 44 and the push block 48 are both slidably connected between the first limiting ring 42 and the second limiting ring 46.

[0030] The piston 44 is located above the push block 48, and a pressure spring 47 is provided between the piston 44 and the push block 48. The pressure spring 47 is only attached and not directly fixedly connected. By adjusting the compression amount of the pressure spring 47, the air pressure at which the piston 44 can be displaced can be changed, thereby limiting the maximum air pressure value inside the pressurized bag body 1.

[0031] The bottom of the push block 48 is connected to a push rod 49, and the push rod 49 is threadedly connected to the second limiting ring 46. Rotating the push rod 49 can drive the push block 48 to move forward and backward, thereby changing the compression amount of the pressure spring 47. The push block 48 is blocked by the second limiting ring 46, and the push block 48 has a limited range of movement. The rotation of the push rod 49 will not cause it to fall off from the pressure limiting assembly 4.

[0032] A guide rod 45 is provided at the bottom of the piston 44 . The guide rod 45 passes through the through holes on the push block 48 and the push rod 49 . The guide rod 45 also passes through the through hole in the middle of the pressure spring 47 .

[0033] The cylinder 41 is also provided with an air leakage hole 43 , which is flush with the first limiting ring 42 , and a pressure sensor is also provided on the lower surface of the first limiting ring 42 .

[0034] The adjustment process of the pressure limiting component 4 is as follows: first, the pressure spring 47 is compressed to the limit state by rotating the push rod 49. At this time, the piston 44 is in contact with the lower surface of the first limiting ring 42. At this time, only when the air pressure in the pressurized bag body 1 reaches the maximum value allowed by its material, the piston 44 can be displaced, and at this time, the pressure sensor is also pressurized and its external indicator light lights up.

[0035] Inflate the inside of the pressurized bag body 1 through the electric air pump 3 so that the internal air pressure reaches the required 300 mmHg. Then rotate the push rod 49 in the reverse direction to gradually reset the pressure spring 47. When the indicator light of the pressure sensor just goes out, at this time the pressure sensor is not under pressure, and the pressure limiting component 4 is debugged and completed.

[0036] At this time, the air pressure value of 300 mmHg is the highest air pressure value of the pressurized bag body 1. When the internal air pressure is higher than this value, the piston 44 will displace, and part of the gas will be released from the air release hole 43 to reduce the internal air pressure until it stabilizes at 300 mmHg. At this time, the pressure spring 47 acts to push the piston 44 back, and the air pressure value is stable.

[0037] As Figure 1-3 shown, the adjusting component 5 is connected to the top of the pressurized bag body 1. When transfusing blood or infusing fluids, when the air pressure of the pressurized bag body 1 decreases due to the reduction of the liquid in the infusion bag or blood transfusion bag, at this time the adjusting component 5 will squeeze and roll up part of the pressurized bag body 1 to make its internal air pressure stable at 300 mmHg; after completion, the adjusting component 5 can also be stored to avoid damage.

[0038] As Figure 3 shown, the adjusting component 5 includes a "C"-shaped frame with the opening facing downwards. A hook ring 51 is provided at the top of the "C"-shaped frame, and the hook ring 51 is convenient for hanging up so that the pressurized bag can be placed at a higher position.

[0039] Two extrusion shafts 52 and a rotating shaft 55 are rotatably connected between the two side walls of the "C"-shaped frame. The rotating shaft 55 is located above the extrusion shafts 52, and a fixing block 53 is also provided between the rotating shaft 55 and the extrusion shafts 52. The fixing block 53 is fixedly connected to the two side walls of the "C"-shaped frame.

[0040] The two extrusion shafts 52 are parallel to each other and maintain a certain distance, and this distance is slightly larger than the sum of the thicknesses of the pressurized bag body 1 and the infusion bag or blood transfusion bag.

[0041] The rotating shaft 55 is connected to the motor shaft of the motor 54, and the motor 54 is fixedly arranged on the side wall of the "C"-shaped frame; an alarm 56 is provided at the top of the adjusting component 5. A signal receiving component of the air pressure sensor 11 is provided inside the alarm 56. The alarm 56 is connected to the motor 54, and the alarm 56 and the motor 54 work or stop working simultaneously.

[0042] The working process of the adjusting component 5 is as follows: when the air pressure value inside the pressurized bag body 1 decreases, the air pressure sensor 11 sends a signal, the alarm 56 gives an alarm to remind the medical staff to pay attention, and at the same time the motor 54 starts to work, and the pressurized bag body 1 is squeezed by the extrusion shafts 52 and then rolled up and stored by the rotating shaft 55.

[0043] It is not until the air pressure inside the pressurized bag body 1 rises to 300 mmHg that the pressure sensor 11 sends out a signal again, and both the alarm 56 and the motor 54 stop working. This principle is to increase the air pressure by reducing the volume.

[0044] Moreover, when the extrusion shaft 52 is working, it is not easy to damage the pressurized bag body 1. At the same time, it can also extrude the infusion bag or blood transfusion bag, so that the liquid inside the infusion bag or blood transfusion bag is squeezed and gathered at the bottom, without causing waste and affecting the treatment.

[0045] When the work is completed and the pressurized bag needs to be stored, disconnect the connection between the alarm and the motor 54, so that the motor 54 works alone. The motor 54 rotates in the reverse direction to release a part of the stored pressurized bag body 1, take out the infusion bag or blood transfusion bag in the sandwich layer, and after opening the pressure relief valve 21, the motor 54 rotates in the forward direction to completely store the pressurized bag body 1.

[0046] The connection between the motor 54 and the alarm 56 is detachable. The motor 54 can be used alone and controlled by an external device signal, or can be controlled by an external button after setting a control board on the "C"-shaped frame, and specific restrictions are not made.

[0047] Of course, the alarm 56 can also correspond to the indicator light of the pressure sensor. When the alarm 56 alarms, it indicates that the air pressure value is lower than 300 mmHg. At this time, the force direction of the piston 44 is inward, the pressure sensor is pressed, and the indicator light will light up. Embodiment 2

[0048] As Figure 1-3 shown, at this time, the adjusting assembly 5 only performs storage after the pressurized bag is used. Start the motor 54, and the rotating shaft 55 rotates together with the motor shaft. After the pressurized bag body 1 is rotated and extruded by the extrusion shaft 52, it is rolled up by the rotating shaft 55 until the hard material at the bottom of the pressurized bag body 1 fits the extrusion shaft 52, and then the motor 54 stops working.

[0049] When the air pressure inside the pressurized bag body 1 is lower than 300 mmHg, the air pressure sensor 11 transmits a signal, and the electric air pump 3 receives the signal and starts to work, filling the inside of the pressurized bag body 1 with air. When the air pressure inside it rises to 300 mmHg, the electric air pump 3 receives the signal and stops inflating.

[0050] The principle for the air pressure inside the pressurized bag body 1 to rise and return to 300 mmHg is as follows: the amount of liquid medicine in the infusion bag decreases, its internal volume increases, and the amount of compressed gas is synchronously increased, so that the air pressure is stably maintained at 300 mmHg.

[0051] The structures of the remaining parts are the same as those in Embodiment 1 and will not be elaborated here.

[0052] The usage method of a blood transfusion and infusion pressurized bag in this embodiment is as follows:

[0053] First, adjust the pressure limiting component 4, rotate the push rod 49 to compress the pressure spring 47 to the limit, and the indicator light of the pressure sensor lights up. Then, inflate the interior of the pressurized bag 1 through the electric air pump 3 to make the internal air pressure reach 300mmhg, and then rotate the push rod 49 in the opposite direction, and the pressure spring 47 gradually resets until the indicator light of the pressure sensor goes out. At this time, the pressure sensor is not under pressure and the adjustment of the pressure limiting component 4 is completed.

[0054] After the preparation work is completed, the air pressure is released through the air release valve 21, and the infusion bag or blood transfusion bag is placed in the interlayer of the pressurized bag body 1, and inflated by the electric air pump 3 to stabilize the air pressure at 300mmhg. The alarm 56 is connected to the motor 54. When the infusion or blood transfusion starts, the air pressure in the pressurized bag body 1 will decrease, the air pressure sensor 11 will send a signal, the alarm 56 will alarm, and at the same time the motor 54 will work, the extrusion shaft 52 will squeeze the pressurized bag body 1, and the rotating shaft 55 will receive this part of the pressurized bag body 1, the internal volume will decrease, and the air pressure will rise and stabilize at 300mmhg. The air pressure sensor 11 will send a signal again, and the alarm 56 and the motor 54 will stop working.

[0055] When the infusion or blood transfusion is completed, the connection between the alarm 56 and the motor 54 is disconnected, and the motor 54 is controlled to reverse independently to release the stored part of the pressurized bag body 1. After taking out the infusion bag or blood transfusion bag, the motor 54 is controlled to rotate forward again to completely store the pressurized bag body 1 to reduce the possibility of damage due to improper storage.

[0056] The above embodiments are only for illustrating the technical idea of ​​the present utility model, and cannot be used to limit the protection scope of the present utility model. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A blood transfusion and infusion pressurized bag, characterized in that: It includes a pressurizing bag body (1), a pressurizing pipe (2), an electric air pump (3), a pressure limiting component (4) and an adjusting component (5). The top of the pressurizing bag body (1) is connected to the adjusting component (5). An air pressure sensor (11) is provided inside the pressurizing bag body (1). The pressurizing bag body (1) is provided with a sandwich layer. An alarm (56) is provided at the top of the adjusting component (5). One end of the pressurizing pipe (2) is connected to the bottom of the pressurizing bag body (1), and the other end of the pressurizing pipe (2) is connected to the electric air pump (3). A branch pipe (22) is provided on the pressurizing pipe (2), and the branch pipe (22) is connected to the pressure limiting component (4). A pressure relief valve (21) is also provided on the pressurizing pipe (2).

2. A blood transfusion and infusion pressurized bag according to claim 1, characterized in that: The pressurizing pipe (2) extends into the pressurizing bag body (1) and extends upward for a certain height, and the extended part is made of a rigid material.

3. A blood transfusion and infusion pressurized bag according to claim 2, characterized in that: The height at which the air pressure sensor (11) is provided is lower than the height of the extended part of the pressurizing pipe (2).

4. A blood transfusion and infusion pressurized bag according to claim 1, characterized in that: The pressure limiting component (4) includes a cylinder body (41). The cylinder body (41) is connected to the branch pipe (22). A first limiting ring (42) is provided on the upper part of the inner wall of the cylinder body (41), and a second limiting ring (46) is provided at the bottom end of the inner wall of the cylinder body. A piston (44) and a push block (48) are both slidably connected between the first limiting ring (42) and the second limiting ring (46). The push block (48) is located below the piston (44). A push rod (49) is threadedly connected to the second limiting ring (46), and the upper end of the push rod (49) is connected to the push block (48). A guide rod (45) is provided at the bottom of the piston (44). The guide rod (45) passes through the through holes in the push block (48) and the push rod (49). The two ends of a pressure spring (47) are respectively in contact with the lower surface of the piston (44) and the upper surface of the push block (48). The guide rod (45) is located in the middle of the pressure spring (47). A vent hole (43) is also provided on the cylinder body (41).

5. A blood transfusion and infusion pressurized bag according to claim 4, characterized in that: A pressure sensor is provided on the lower surface of the first limiting ring (42).

6. A blood transfusion and infusion pressurized bag according to claim 4, characterized in that: The vent hole (43) is flush with the lower surface of the first limiting ring (42).

7. A blood transfusion and infusion pressurized bag according to claim 1, characterized in that: A signal receiving component of the air pressure sensor (11) is provided inside the alarm (56).

8. A blood transfusion and infusion pressurized bag according to claim 1, characterized in that: The adjusting component (5) includes a "C"-shaped frame with an opening facing downward. A hook ring (51) is provided at the top of the "C"-shaped frame. Two extrusion shafts (52) and a rotating shaft (55) are both rotatably connected between the two side walls of the "C"-shaped frame. The rotating shaft (55) is located above the extrusion shafts (52). The rotating shaft (55) is connected to the motor shaft of a motor (54). The motor (54) is provided on the side wall of the "C"-shaped frame. A fixing block (53) is also provided between the two side walls of the "C"-shaped frame. The fixing block (53) is located between the extrusion shafts (52) and the rotating shaft (55).

9. A blood transfusion and infusion pressurized bag according to claim 8, characterized in that: The two extrusion shafts (52) are parallel to each other and maintain a certain distance between them.

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