Blood transfusion apparatus with adjustable blood transfusion speed

Abstract

The invention provides a blood transfusion speed-adjustable blood transfusion apparatus, and relates to the technical field of blood transfusion apparatuses, and the blood transfusion apparatus is characterized in that the top end of a dropper is connected with a bottle insertion tube, the bottle insertion tube is used for puncturing into a disposable plastic blood bag, the top end of the bottle insertion tube is open, and a circle of blood inlet groove is formed in the circumferential outer wall of the top end of the bottle insertion tube in a surrounding manner; a gap is kept between the circle of blood inlet groove and the opening in the top end of the bottle inserting tube; the continuous vertical bent part on the bottom side of the driving rod is positioned in the top end space of the dropper; a short vertical supporting section on the bottom side of the driving rod is in penetrating sliding fit with a top plate of the dropper, and a sliding ring is fixed to the top end of the short vertical supporting section of the driving rod. The conical block can slide inwards to be hidden in the bottle inserting tube between the circle of blood inlet groove and the opening in the top end of the bottle inserting tube when penetrating through the bottom cover of the blood container in an idle state, so that a conical thorn part of the bottle inserting tube is prevented from protruding out of the blood bag, the protruding conical thorn part is prevented from puncturing the outer wall of the blood bag when puncturing and (or) moving the blood bag, and blood preparations are prevented from being polluted and scrapped.

Description

Technical Field

[0001] The present invention relates to the technical field of blood transfusion apparatuses, and in particular to a blood transfusion apparatus with adjustable blood transfusion speed. Background Art

[0002] Blood is an indispensable substance for maintaining normal human functions. When a patient loses too much blood or anemia causes hypoxia or even endangers life, timely blood transfusion is needed to ensure the patient's life safety. A blood transfusion device is a medical device that establishes a pathway between blood and veins. It is an indispensable medical device for clinical blood transfusion therapy.

[0003] The existing blood transfusion device is composed of a general bottle insertion needle, a needle cap, a dropper, a blood transfusion tube, etc. The bottle insertion needle used for puncturing the blood bag (blood container) is suitable for penetrating blood bag plugs of different lengths. Its length is generally redundant, which will cause the cone tip to generally protrude from the inside of the blood bag when penetrating the blood bag plug, making it easy for the cone tip to puncture the outer wall of the blood bag when puncturing or moving the blood bag, resulting in leakage, waste and pollution of blood products such as red blood cells, plasma, platelets, etc. Summary of the invention

[0004] In view of this, the present invention provides a blood transfusion device with adjustable blood transfusion speed to solve the problem that the length of the bottle insertion needle is generally redundantly set, resulting in the cone tip portion generally protruding from the inside of the blood bag when penetrating the blood bag cover, causing the cone tip portion to easily pierce the outer wall of the blood bag when puncturing or moving the blood bag, resulting in leakage, waste and pollution of blood preparations.

[0005] The technical solution proposed by the present invention is: a blood transfusion device with adjustable blood transfusion speed, specifically comprising a hose, a dropper and a flow regulator, wherein the head end of the hose is connected to the liquid outlet pipe at the bottom of the dropper, and the hose is provided with a flow regulator;

[0006] The top of the dropper is connected to a bottle inserting tube, which is used to puncture the blood bag, and the top of the bottle inserting tube is open, and a circle of blood inlet grooves is arranged around the outer wall of the circle at the top of the bottle inserting tube; a distance is maintained between the circle of blood inlet grooves and the top opening of the bottle inserting tube;

[0007] A driving rod is slidably installed in the bottle insertion tube, the driving rod is a hook-shaped structure, and the continuous vertical bending part on the bottom side of the driving rod is located in the top space of the dropper; the short vertical support section on the bottom side of the driving rod is slidably matched with the top plate of the dropper, and a slip ring is fixed on the top of the short vertical support section of the driving rod, and the slip ring is slidably matched with the bottle insertion tube; a cone block is fixed on the top of the driving rod, and the cone block is used to puncture the blood bag; when idle, the cone block slides inwardly and is hidden in the bottle insertion tube between a circle of blood inlet groove and the top opening of the bottle insertion tube. The cone block is movably slidably installed by the driving rod, and can slide inwardly and be hidden when it penetrates the bottom cover of the blood bag in an idle state. The plug is hidden in the bottle inserting tube between a circle of blood inlet groove and the top opening of the bottle inserting tube, so as to avoid the awl piercing part of the bottle inserting tube protruding into the blood bag, and to prevent the protruding awl piercing part from piercing the outer wall of the blood bag when puncturing or moving the blood bag. The slip ring can implement torsion limit on the driving rod, so that the driving rod is centered inside the bottle inserting tube, and the driving rod and the cone block can be driven up and down by the slip ring, and the cone block is forced to maintain the use state of ejection and puncture. When the cone block is hidden inside the slide, it should be avoided that the interference fit slides down to block the circle of blood inlet groove, and when the bottle inserting tube is inserted into the blood bag, it drains the blood outward through the circle of blood inlet groove.

[0008] A rubber sealing ring is embedded in the through hole between the short vertical support section at the bottom side of the driving rod and the top plate of the dropper. The rubber sealing ring can squeeze and seal the through hole between the driving rod and the top plate of the dropper to prevent the plasma dripped into the dropper from leaking out through the through hole. The friction and squeezing resistance of the rubber sealing ring can keep the driving rod and the cone block hidden in the bottle insertion tube.

[0009] Furthermore,

[0010] The first end of the soft tube is connected with a blood transfusion needle for puncturing a blood vessel to perform blood transfusion.

[0011] Furthermore,

[0012] The main body of the dropper is in a conical structure, and the top end of the dropper is in a vertical circular tube structure.

[0013] Furthermore,

[0014] A downwardly arranged blood transfusion needle cover is fixed on the circumferential outer wall of the top part of the dropper, and the blood transfusion needle cover is in a conical column structure, and the blood transfusion needle is plugged into and matched with the blood transfusion needle cover before and after use, which can avoid needlestick injuries to patients and medical staff caused by the blood transfusion needle before and after use, and cross infection, and the blood transfusion needle cover is directly integrated and installed on the dropper, and is not easy to lose. Compared with the existing technology in which the blood transfusion needle cover is independent and separated from the blood transfusion device, it can be avoided that when the blood transfusion needle cover is extracted and separated from the blood transfusion needle for use, it cannot be temporarily stored at a fixed point, and it is easy to be placed randomly and lost, which is conducive to the reuse of the blood transfusion needle cover after the blood transfusion is completed.

[0015] Furthermore,

[0016] A filter cartridge is movably installed inside the main body of the dropper. The filter cartridge has a conical structure, and a counterweight column is fixed to the bottom of the filter cartridge. The filter cartridge is used to filter fibers and proteins in plasma. The filter cartridge is rotatably installed. When the dropper is shaken horizontally, the filter cartridge can be driven to swing horizontally and impact contact with the inner wall of the dropper, thereby vibrating and cleaning impurities attached to the filter screen of the filter cartridge. The counterweight column can increase the inertial impact force generated when the filter cartridge is swung for cleaning.

[0017] Furthermore,

[0018] Two positioning sleeves are symmetrically arranged on the circumferential inner wall at the top position of the dropper main body part, and two short rotating shafts are symmetrically fixed on the circumferential outer wall of the top part of the filter cartridge, and the two short rotating shafts are correspondingly rotatably matched with the two positioning sleeves.

[0019] Furthermore,

[0020] The main body of the flow regulator is a rectangular strip block with a central through hole, the central through hole is used to pass the hose, and a positioning shaft and a threaded driving shaft are fixed on the top part of the rectangular strip block at intervals.

[0021] Furthermore,

[0022] An L-shaped slide bar is slidably mounted on the positioning shaft, a pull ring is fixed on the top horizontal part of the L-shaped slide bar, and the hose passes through the pull ring.

[0023] Furthermore,

[0024] The threaded drive shaft is screwed through and fitted with the vertical support portion of the L-shaped slide rod. Positive and negative rotation of the threaded drive shaft can drive the pull ring to slide back and forth along the positioning axis, thereby tightening and squeezing the hose passing through the flow regulator, controlling the size of the hose flow aperture, and achieving regulation of the blood transfusion flow rate.

[0025] The blood transfusion device with adjustable blood transfusion speed provided by the present invention has the following beneficial effects:

[0026] When the present invention is in use, the cone block is used to puncture the bottom cover of the blood bag; the cone block is movably and slidably installed by a driving rod, and when it is in an idle state after penetrating the bottom cover of the blood bag, it can slide inwardly and be hidden in the bottle inserting tube between a circle of blood inlet grooves and the top opening of the bottle inserting tube, so as to avoid the cone piercing component of the bottle inserting tube protruding into the interior of the blood bag, and to prevent the protruding cone piercing component from piercing the outer wall of the blood bag when puncturing and moving the blood bag, thereby causing blood leakage, waste and pollution.

[0027] In addition, the rubber sealing ring can squeeze and seal the through hole between the driving rod and the top plate of the dropper to prevent the plasma dripped into the dropper from leaking out through the through hole, and the friction and squeezing resistance of the rubber sealing ring can keep the driving rod and the cone block hidden in the bottle tube.

[0028] In addition, the blood transfusion needle is plugged into the blood transfusion needle cover before and after use, which can avoid needlestick injuries and cross infection to patients and medical staff caused by the blood transfusion needle before and after use. The blood transfusion needle cover is directly integrated and installed on the dropper, and is not easy to lose. Compared with the existing technology that the blood transfusion needle cover is independent and separated from the blood transfusion device, it can avoid that when the blood transfusion needle cover is separated from the blood transfusion needle for use, it cannot be temporarily stored at a fixed point and is easily lost due to random placement. This is conducive to the reuse of the blood transfusion needle cover after the blood transfusion is completed.

[0029] In addition, the filter cartridge is used to filter fibers and proteins in plasma. The filter cartridge is installed in a rotating manner. When the dropper is shaken horizontally, the filter cartridge can be driven to swing horizontally and impact contact with the inner wall of the dropper, thereby vibrating and cleaning the impurities attached to the filter screen of the filter cartridge. Compared with the existing technology of fixing the filter component in the dropper and relying on the elastic dropper to transmit the vibration force to the filter component for cleaning, the vibration amplitude of the filter component is larger and the cleaning effect is better. The counterweight column can increase the inertial impact force generated by the filter cartridge during swing cleaning, thereby increasing the vibration force generated on the filter cartridge, which helps to further improve the cleaning effect of the filter component.

[0030] In addition, the forward and reverse rotation of the threaded drive shaft can push and drive the pull ring to slide back and forth along the positioning shaft, thereby squeezing the hose passing through the flow regulator, controlling the size of the hose flow aperture, and adjusting the blood transfusion flow rate. The squeezing force of the pull ring on the hose is maintained by the threaded pushing rod and is not easy to loosen. Compared with the existing technology of adjusting the blood transfusion flow by using a roller to press the hose, the stability of the hose squeeze is better, and the probability of the components that squeeze the hose to adjust the flow rate loosening and failure during the process of the hose being pulled and moved can be reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings of the embodiment are briefly introduced below.

[0032] The drawings described below are only related to some embodiments of the present invention, but are not intended to limit the present invention.

[0033] In the attached picture:

[0034] Figure 1 The overall structural diagram of the present invention is shown;

[0035] Figure 2 A schematic diagram showing the installation position of the blood transfusion needle cover of the present invention is shown;

[0036] Figure 3 The overall bottom side structural schematic diagram of the present invention is shown;

[0037] Figure 4 A schematic diagram of the inner side structure of a half-section of the dropper of the present invention is shown;

[0038] Figure 5 The schematic diagram of the filter cartridge structure of the present invention is shown;

[0039] Figure 6 The present invention shows Figure 4 The enlarged structural diagram of part A in the middle;

[0040] Figure 7 A schematic diagram of the flow regulator structure of the present invention is shown;

[0041] Figure 8 The present invention shows Figure 7 The enlarged structural diagram of part A in the middle;

[0042] Reference numerals list

[0043] 1. Hose; 101. Blood transfusion needle;

[0044] 2. Dropper; 201. Bottle inserting tube; 202. Blood transfusion needle cover; 203. Positioning cover;

[0045] 3. driving rod; 301. slip ring; 302. cone block;

[0046] 4. flow regulator; 401. threaded drive shaft; 402. positioning shaft; 403. L-shaped slide rod; 404. pull ring;

[0047] 5. Filter cartridge; 501. Counterweight column. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0049] Example 1, please refer to Figures 1 to 8 :

[0050] The present invention provides a blood transfusion device with adjustable blood transfusion speed, comprising a hose 1, a dropper 2 and a flow regulator 4, wherein the head end of the hose 1 is connected to a liquid outlet pipe at the bottom of the dropper 2, and the flow regulator 4 is provided on the hose 1;

[0051] The top of the dropper 2 is connected to a bottle inserting tube 201, which is used to puncture the blood bag, and the top of the bottle inserting tube 201 is open, and a circle of blood inlet grooves is arranged around the circumferential outer wall at the top of the bottle inserting tube 201; a distance is maintained between the circle of blood inlet grooves and the top opening of the bottle inserting tube 201;

[0052] A driving rod 3 is slidably installed in the bottle insertion tube 201, and the driving rod 3 is a hook-shaped structure, and the continuous vertical bending part on the bottom side of the driving rod 3 is located in the top space of the dropper 2; the short vertical support section on the bottom side of the driving rod 3 is slidably matched with the top plate of the dropper 2, and a slip ring 301 is fixed on the top of the short vertical support section of the driving rod 3, and the slip ring 301 is slidably matched with the bottle insertion tube 201; a cone block 302 is fixed on the top of the driving rod 3, and the cone block 302 is used to puncture the blood bag; the cone block 302 is movably slidably installed by the driving rod 3, and it is idle in the idle state when it penetrates the bottom cover of the blood bag When the blood bag is in the state, the drive rod 3 can be slid inwardly and hidden in the bottle inserting tube 201 between a circle of blood inlet groove and the top opening of the bottle inserting tube 201, so as to avoid the cone thorn component of the bottle inserting tube 201 protruding into the inside of the blood bag, and to prevent the protruding cone thorn component from piercing the outer wall of the blood bag when the blood bag is moved, causing blood leakage, waste and pollution. The slip ring 301 can implement torsion limiting on the driving rod 3, so that the driving rod 3 is centered inside the bottle inserting tube 201, and the driving rod 3 and the cone block 302 can be driven up and down by the slip ring 301, and the cone block 302 is forced to maintain the use state of ejection and puncture;

[0053] It is worth noting that when the cone block 302 is slid inwardly and hidden, it should be avoided that the interference fit slides down to block the blood inlet groove, and when the bottle inserting tube 201 is inserted into the blood container, it drains the plasma outward through the blood inlet groove.

[0054] A rubber sealing ring is embedded in the through hole between the short vertical support section on the bottom side of the driving rod 3 and the top plate of the dropper 2. The rubber sealing ring can squeeze and seal the through hole between the driving rod 3 and the top plate of the dropper 2 to prevent the blood dripped into the dropper 2 from leaking out through the through hole. The friction and squeezing resistance of the rubber sealing ring can keep the driving rod 3 and the cone block 302 hidden in the bottle insertion tube 201.

[0055] in,

[0056] The first end of the hose 1 is connected to a blood transfusion needle 101 for puncturing a blood vessel to perform blood transfusion.

[0057] in,

[0058] The main body of the dropper 2 is a conical structure, and the top end of the dropper 2 is a vertical circular tube structure.

[0059] in,

[0060] A downwardly arranged blood transfusion needle cover 202 is fixed on the circumferential outer wall of the top part of the dropper 2. The blood transfusion needle cover 202 is a conical column structure, and the blood transfusion needle 101 is plugged into the blood transfusion needle cover 202 before and after use, which can avoid the blood transfusion needle 101 before and after use causing needlestick injuries to patients and medical staff and cross infection. The blood transfusion needle cover 202 is directly integrated and installed on the dropper 2, and is not easy to lose. Compared with the existing technology in which the blood transfusion needle cover 202 is independent and separated from the blood transfusion device, it can avoid that the blood transfusion needle cover 202 cannot be temporarily stored at a fixed point when it is extracted and separated from the blood transfusion needle 101 for use, and it is easy to be placed randomly and lost, which is conducive to the reuse of the blood transfusion needle cover 202 after the blood transfusion is completed.

[0061] in,

[0062] A filter cartridge 5 is movably installed inside the main body of the dropper 2. The filter cartridge 5 is of a conical structure, and a counterweight column 501 is fixed at the bottom of the filter cartridge 5. The filter cartridge 5 is used to filter fibers and proteins in plasma. The filter cartridge 5 is rotatably installed. When the dropper 2 is shaken horizontally, the filter cartridge 5 can be driven to swing horizontally and impact contact with the inner wall of the dropper 2, so that impurities attached to the filter screen of the filter cartridge 5 are vibrated and cleaned. Compared with the existing technology in which the filter component is fixedly installed in the dropper 2 and the vibration force is transmitted to the filter component by the spring-vibrating dropper 2 for cleaning, the vibration amplitude of the filter component is larger and the cleaning effect is better.

[0063] The counterweight column 501 can increase the inertial impact force generated when the filter cartridge 5 is swung for cleaning, thereby increasing the vibration force generated on the filter cartridge 5, which helps to further improve the cleaning effect of the filter component.

[0064] in,

[0065] Two positioning sleeves 203 are symmetrically arranged on the inner circumference wall at the top of the main body of the dropper 2, and two short rotating shafts are symmetrically fixed on the outer circumference wall at the top of the filter cartridge 5, and the two short rotating shafts are rotatably matched with the two positioning sleeves 203.

[0066] Based on the first embodiment, the second embodiment:

[0067] The main body of the flow regulator 4 is a rectangular strip block with a central hole, the central hole is used to pass the hose 1, and a positioning shaft 402 and a threaded drive shaft 401 are fixed on the top part of the rectangular strip block at intervals.

[0068] in,

[0069] An L-shaped slide bar 403 is slidably mounted on the positioning shaft 402, and a pull ring 404 is fixed on the top horizontal part of the L-shaped slide bar 403. The hose 1 passes through the pull ring 404, and the threaded drive shaft 401 rotates forward and reversely to drive the pull ring 404 to slide back and forth along the positioning shaft 402, thereby performing loose and tight squeezing on the hose 1 passing through the flow regulator 4, controlling the flow diameter of the hose 1, and adjusting the blood transfusion flow rate. The squeezing force of the pull ring 404 on the hose 1 is maintained by the threaded pushing rod, and is not easy to loosen. Compared with the existing technology of adjusting the blood transfusion flow by rolling the hose 1 with a roller, the stability of the squeezing of the hose 1 is better, and the probability of loosening and failure of the components for squeezing the hose 1 to adjust the flow rate can be reduced during the process of the hose 1 being pulled and moved.

[0070] in,

[0071] The threaded drive shaft 401 and the vertical support portion of the L-shaped slide rod 403 are screwed together.

[0072] The working principle of this embodiment is as follows: the bottle inserting tube 201 is used to be inserted into the blood bag, and the cone block 302 is used to puncture the bottom cover of the blood bag; the cone block 302 is movably and slidably installed through the driving rod 3, and the driving rod 3 can be driven up and down by the slip ring 301, and the slip ring 301 can limit the torsion of the driving rod 3, so that the driving rod 3 is centered inside the bottle inserting tube 201, and the cone block 302 can be forced to maintain the use state of ejection and puncture by the slip ring 301, and the cone block 302 is idle in the state of penetrating the bottom cover of the blood bag. When the cone block 302 is slid inwardly and hidden in the bottle inserting tube 201 between a circle of blood inlet groove and the top opening of the bottle inserting tube 201, the cone thorn component of the bottle inserting tube 201 is prevented from protruding into the interior of the blood bag, and the protruding cone thorn component is prevented from piercing the outer wall of the blood bag when the blood bag is moved, causing blood leakage, waste and pollution. It is worth noting that when the cone block 302 is slid inwardly and hidden, it should be avoided that the circle of blood inlet groove is blocked by excessive sliding, and when the bottle inserting tube 201 is inserted into the blood bag, it drains the plasma outward through the circle of blood inlet groove;

[0073] The rubber sealing ring can squeeze and seal the through hole between the driving rod 3 and the top plate of the dropper 2 to prevent the plasma dripped into the dropper 2 from leaking out through the through hole, and the friction and squeezing resistance of the rubber sealing ring can keep the driving rod 3 and the cone block 302 hidden in the bottle inserting tube 201;

[0074] The blood transfusion needle 101 is plugged into the blood transfusion needle cover 202 before and after use, which can prevent the blood transfusion needle 101 from causing needlestick injuries to patients and medical staff before and after use, and from causing cross infection;

[0075] The filter cartridge 5 is used to filter the fibers and proteins in the plasma. The filter cartridge 5 is rotatably mounted. When the dropper 2 is shaken horizontally, the filter cartridge 5 can be driven to swing horizontally and impact contact with the inner wall of the dropper 2, so as to perform vibration cleaning on the impurities attached to the filter screen of the filter cartridge 5. The counterweight column 501 can increase the inertial impact force generated when the filter cartridge 5 is swung for cleaning, thereby improving the vibration cleaning effect of the filter cartridge 5.

[0076] The threaded drive shaft 401 can rotate forward and backward to drive the pull ring 404 to slide back and forth along the positioning shaft 402, thereby squeezing the hose 1 passing through the flow regulator 4, controlling the flow diameter of the hose 1, and adjusting the blood transfusion flow rate.

[0077] In this article, there are a few points to note:

[0078] 1. The drawings of the embodiments of the present invention only involve structures related to the embodiments of the present invention, and other structures can refer to the general design.

[0079] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to obtain new embodiments.

[0080] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art who is familiar with the technical field can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A blood transfusion device with adjustable blood transfusion speed, comprising: A hose (1), a dropper (2) and a flow regulator (4), wherein the head end of the hose (1) is connected to a liquid outlet pipe at the bottom of the dropper (2), and the hose (1) is provided with a flow regulator (4); The invention is characterized in that the top end of the dropper (2) is connected to a bottle inserting tube (201), the bottle inserting tube (201) is used to puncture a blood bag containing a blood product, and the top end of the bottle inserting tube (201) is provided with an opening; a circle of blood inlet grooves is provided around the circumferential outer wall at the top end of the bottle inserting tube (201); a distance is maintained between the circle of blood inlet grooves and the top end opening of the bottle inserting tube (201); A driving rod (3) is slidably installed in the bottle inserting tube (201), the driving rod (3) is a hook-shaped structure, and the continuous vertical bending part on the bottom side of the driving rod (3) is located in the top space of the dropper (2); the short vertical support section on the bottom side of the driving rod (3) is slidably matched with the top plate of the dropper (2), and a sliding ring (301) is fixed on the top of the short vertical support section of the driving rod (3), and the sliding ring (301) is slidably matched with the bottle inserting tube (201); a cone block (302) is fixed on the top of the driving rod (3), and the cone block (302) is used to puncture the blood container; when idle, the cone block (302) is slidably hidden in the bottle inserting tube (201) between a circle of blood inlet groove and the top opening of the bottle inserting tube (201); A rubber sealing ring is embedded in the through-hole between the short vertical support section at the bottom side of the driving rod (3) and the top plate of the dropper (2).

2. A blood transfusion device with adjustable blood transfusion speed according to claim 1, characterized in that: The head end of the hose (1) is connected to a blood transfusion needle (101) for puncturing a blood vessel to perform blood transfusion.

3. A blood transfusion device with adjustable blood transfusion speed according to claim 2, characterized in that: The main body of the dropper (2) is in a conical structure, and the top end of the dropper (2) is in a vertical circular tube structure.

4. A blood transfusion device with adjustable blood transfusion speed according to claim 3, characterized in that: A downwardly arranged blood transfusion needle cover (202) is fixed on the circumferential outer wall of the top end portion of the dropper (2); the blood transfusion needle cover (202) is in a conical column structure, and the blood transfusion needle (101) is plugged into and matched with the blood transfusion needle cover (202) before and after use.

5. The blood transfusion device with adjustable blood transfusion speed according to claim 3, characterized in that: The dropper (2) and the filter cartridge (5) are of conical structure, and a counterweight column (501) is fixed at the bottom of the filter cartridge (5).

6. A blood transfusion device with adjustable blood transfusion speed according to claim 5, characterized in that: Two positioning sleeves (203) are symmetrically arranged on the inner circumferential wall at the top of the main body of the dropper (2), and two short rotating shafts are symmetrically fixed on the outer circumferential wall at the top of the filter cartridge (5), and the two short rotating shafts are rotatably matched with the two positioning sleeves (203).

7. The blood transfusion device with adjustable blood transfusion speed according to claim 1, characterized in that: The main body of the flow regulator (4) is a rectangular strip block with a central through hole, the central through hole is used to pass the hose (1), and a positioning shaft (402) and a threaded drive shaft (401) are fixed to the top of the rectangular strip block at intervals.

8. The blood transfusion device with adjustable blood transfusion speed according to claim 7, characterized in that: An L-shaped slide bar (403) is slidably mounted on the positioning shaft (402), a pull ring (404) is fixed on the top horizontal part of the L-shaped slide bar (403), and the hose (1) passes through the pull ring (404).

9. The blood transfusion device with adjustable blood transfusion speed according to claim 8, characterized in that: The threaded drive shaft (401) and the vertical support portion of the L-shaped slide rod (403) are threadedly engaged with each other.

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