CN114949409A

CN114949409A - Plasma heating device for blood purification

Info

Publication number: CN114949409A
Application number: CN202210372336.5A
Authority: CN
Inventors: 田红; 杨洁; 邹晓荣; 刘永星; 孙诗洋; 黄子杨; 李铭; 张益虹; 李冰洋; 张鲜绸
Original assignee: Chinese People's Liberation Army Air Force No986 Hospital
Current assignee: Chinese People's Liberation Army Air Force No986 Hospital
Priority date: 2022-04-11
Filing date: 2022-04-11
Publication date: 2022-08-30

Abstract

The invention discloses a plasma heating device for blood purification, which comprises a moving frame, wherein a control box is arranged on the moving frame, the moving frame comprises a cross base, pulleys are arranged at the bottoms of four corners of the cross base, a supporting rod is fixedly connected at the center position of the top end of the cross base, the control box is fixedly arranged on the supporting rod, a fixing mechanism is arranged on the supporting rod, and a heating mechanism is arranged at the top end of the supporting rod.

Description

Plasma heating device for blood purification

Technical Field

The invention relates to the technical field of medical instruments, in particular to a plasma heating device for blood purification.

Background

Blood purification is also called dialysis in daily life. It has the following meanings: the blood of the patient is led out of the body and passes through a purifying device to remove some pathogenic substances and purify the blood, thereby achieving the purpose of treating diseases. The blood purification should include: hemodialysis, hemofiltration, hemoperfusion, plasmapheresis, immunoadsorption, and the like. Peritoneal dialysis does not draw blood out of the body, but the principle is the same. Hemodialysis is only one of the methods for treating chronic renal failure.

Hemodialysis (HD), Hemoperfusion (HP), plasmapheresis, etc., and Continuous Blood Purification (CBP), blood lipid purification, Artificial Liver Support System (ALSS) are combined by the above technologies, and peritoneal dialysis does not have extracorporeal circulation, and only uses ascites exchange to achieve the purpose of purifying blood, but in a broad sense, should also be included in blood purification therapy.

Hemodialysis: the blood purification device utilizes the principle of a semipermeable membrane, and achieves the purposes of purifying blood and correcting water electrolyte and acid-base balance by diffusing and removing various harmful and redundant metabolic wastes and excessive electrolytes in the body.

Blood perfusion: the principle of blood perfusion is to draw the blood of a patient out of the body, contact the blood with a solid adsorbent (such as resin in an HA resin blood perfusion device), remove certain metabolites, exogenous drugs or poisons and the like in the body in an adsorption mode, and then return the purified blood to the patient, thereby achieving the purpose of treating diseases.

Present hemodialysis in-process, the setting for of dislysate temperature is to patient's body temperature, blood pressure and comfort level all can produce direct influence, the dislysate that is less than patient actual measurement body temperature can arouse patient's adverse reaction, seriously influence patient's dialysis treatment effect and experience, set for fixed constant temperature in addition and also can cause the adverse reaction because of the individual difference of uneasy person, ventilative process time is long, the doctor can't accomplish the patient of paying attention to at every moment, consequently need for a dislysate heating device that can the suitable temperature of automatically regulated urgently.

Disclosure of Invention

In order to solve the defects mentioned in the background technology, the invention aims to provide a plasma heating device for blood purification, which can control the temperature of a heating block along with the change of the blood pressure of a patient by arranging a processor, thereby changing the temperature of dialysate passing through the heating block, reducing the probability of adverse reaction of the patient, enhancing the use comfort of the patient and avoiding the need of nursing by medical staff for a long time.

The purpose of the invention can be realized by the following technical scheme:

a plasma heating device for blood purification comprises a moving frame, wherein a control box is arranged on the moving frame, the moving frame comprises a cross-shaped base, pulleys are arranged at the bottoms of four corners of the cross-shaped base, a supporting rod is fixedly connected to the center position of the top end of the cross-shaped base, the control box is fixedly arranged on the supporting rod, a fixing mechanism is arranged on the supporting rod, and a heating mechanism is arranged at the top end of the supporting rod;

the control box includes control panel and treater, and the treater is connected with external power source electricity, and control panel is connected with the treater electricity, and the treater electricity is connected with two temperature sensor, and on a temperature sensor located the defeated blood vessel of dialysis machine, another temperature sensor located patient's body surface, and the treater electricity is connected with the sphygmomanometer, and the treater is used for controlling the heating temperature of heating mechanism.

It should be noted that the experimental data in the text "influence of dialysate temperature on comfort of hemodialysis patient" of volume 47, 12, 2012, of the traditional chinese nursing impurities prove that the blood pressure of the patient is influenced by the dialysate temperature during dialysis, and the optimal scheme is to adopt a dialysis temperature consistent with the measured body temperature, because the patient is most comfortable at this temperature.

According to a preferable scheme of the invention, the heating mechanism comprises a first clamping block and a second clamping block, a rotating shaft is fixedly connected to one side, close to the second clamping block, of the first clamping block, a lantern ring is fixedly connected to one side, close to the first clamping block, of the second clamping block, the lantern ring is sleeved on the rotating shaft, a threaded groove is formed in the outer surface of the rotating shaft, a sliding block is fixedly connected to the inner surface of the lantern ring, the sliding block is located inside the threaded groove, a T-shaped clamping block is rotatably connected to one side, far away from the lantern ring, of the second clamping block, a clamping groove used for limiting displacement of the T-shaped clamping block is formed in one side, far away from the rotating shaft, heating blocks are embedded to one sides, close to each other, an adapter tube is clamped between the two heating blocks, the adapter tube is of a hollow structure, and one end of the adapter tube is communicated with a blood transfusion tube of the dialysis machine.

As a preferred scheme of the invention, the adapter tube comprises a heating zone, the heating zone is rhombic, the heating zone is positioned between two heating blocks, the distance between the upper wall and the lower wall of the heating zone is 1.3-1.5mm, the adapter tube is made of a transparent high-temperature-resistant material, and the heating blocks are electrically connected with the processor.

According to a preferred scheme of the invention, the fixing mechanism comprises a sliding sleeve and a fixing arm, the sliding sleeve is sleeved on the supporting column, the fixing arm is fixedly arranged on the sliding sleeve, one end of the fixing arm, which is far away from the sliding sleeve, is fixedly connected with a suspension wall, two fixing frames are arranged on the suspension wall, one fixing frame is fixedly arranged at the top end of the suspension wall, and the other fixing frame is sleeved on the suspension wall.

As a preferred scheme of the invention, the bottom end of the suspension wall is fixedly connected with a machine base, one end of the machine base, which is close to the fixed frame, is fixedly connected with a lifting motor, the output end of the lifting motor is fixedly connected with the other fixed frame, and the lifting motor is electrically connected with the processor.

As a preferable scheme of the invention, the support rod is provided with a foldable handle, the foldable handle comprises a through rod, a limiting piece and a spring, the through rod penetrates through the support rod, the limiting piece is fixedly arranged at one end of the through rod, the spring is sleeved on the through rod, the spring is positioned between the limiting piece and the support rod, one end of the through rod, which is far away from the limiting piece, is fixedly connected with a first connecting rod, one side of the first connecting rod, which is close to the support rod, is symmetrically provided with contact blocks, a connecting shaft is rotatably connected between the contact blocks, the connecting shaft penetrates through the through rod, and the contact blocks are in abutting connection with the support rod.

As a preferable scheme of the foldable handle, a reinforcing rod is fixedly connected to one side, away from the support rod, of the first connecting rod, a second connecting rod is fixedly connected to one end, away from the first connecting rod, of the reinforcing rod, the first connecting rod and the second connecting rod are parallel to each other, the reinforcing rod is perpendicular to the first connecting rod, the reinforcing rod is perpendicular to the second connecting rod, the foldable handle further comprises a U-shaped frame, two ends of the U-shaped frame are hinged to the first connecting rod and the second connecting rod respectively, a magnetic suction plate is fixedly connected to the top end of the U-shaped frame, and the magnetic suction plate is used for the U-shaped frame to suck the U-shaped frame to be close to the first connecting rod and the second connecting rod.

As a preferred scheme of the invention, the supporting rod is a square prism, the contact block is a cuboid, and the first connecting rod and the second connecting rod are both made of iron materials.

The invention has the beneficial effects that:

1. according to the invention, the movable frame and the foldable handle are arranged, the U-shaped frame can be held by hands, the movable frame is pushed to the head of a patient bed, the fixed frame is close to the bedside, the use is convenient, the supporting rod is kept still, the first connecting rod is pulled towards the direction far away from the supporting rod and rotates around the connecting shaft, then the two U-shaped frames are rotated, so that the two U-shaped frames are adsorbed on the first connecting rod and the second connecting rod under the action of the magnetic adsorption plate, more operation space for doctors can be reduced, the lifting motor is controlled to start, the two fixed frames are pushed to be close to each other until the two fixed frames clamp the bed edge, and the movable frame is prevented from being pushed accidentally and breaking the connecting pipeline;

2. the replaceable adapter tube is arranged, so that the medical staff can use the replaceable adapter tube conveniently, the disposable adapter tube avoids the infection of blood infectious diseases, the heating area of dialysate circulating in the adapter tube is increased by arranging the heating area, and the dialysate can be heated more quickly to reduce the temperature difference between the heating block body and the passing dialysate;

3. the temperature of the heating block can be controlled along with the change of the blood pressure of the patient by arranging the processor, so that the temperature of the dialysate passing through the heating block is changed, the probability of adverse reaction of the patient is reduced, the use comfort of the patient is enhanced, and the medical staff is not required to take care of the patient for a long time.

Drawings

The invention will be further described with reference to the accompanying drawings.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic structural view of a moving frame according to the present invention;

FIG. 3 is a schematic view of the structure of the heating mechanism of the present invention;

FIG. 4 is a schematic view of the structure of the rotating shaft according to the present invention;

FIG. 5 is a cross-sectional view of the spindle and collar of the present invention;

FIG. 6 is a schematic view of an adapter tube of the present invention;

FIG. 7 is a schematic view of a securing mechanism of the present invention;

FIG. 8 is a schematic view of a foldable handle of the present invention;

fig. 9 is a functional block diagram of the present invention.

In the figure:

1. a movable frame; 2. a control box; 3. a cross-shaped base; 4. a pulley; 5. a support bar; 6. a fixing mechanism; 7. a heating mechanism; 8. a control panel; 9. a processor; 10. a temperature sensor; 11. a blood pressure monitor; 12. a first clamping block; 13. a second clamping block; 14. a rotating shaft; 15. a collar; 16. a thread groove; 17. a slider; 18. a T-shaped fixture block; 19. a card slot; 20. a heating block; 21. a transfer tube; 22. a heating zone; 23. a sliding sleeve; 24. a fixed arm; 25. a suspended wall; 26. a fixed mount; 27. a machine base; 28. a lifting motor; 29. a foldable handle; 30. penetrating the rod; 31. a limiting sheet; 32. a spring; 33. a first link; 34. a contact block; 35. a connecting shaft; 36. a reinforcing rod; 37. a second link; 38. a U-shaped frame; 39. and a magnetic attraction plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "opening," "upper," "lower," "thickness," "top," "middle," "length," "inner," "peripheral," and the like are used in an orientation or positional relationship that is merely for convenience in describing and simplifying the description, and do not indicate or imply that the referenced component or element must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present invention.

As shown in fig. 1 to 9, a plasma heating device for blood purification comprises a moving frame 1, wherein a control box 2 is arranged on the moving frame 1, the moving frame 1 comprises a cross base 3, pulleys 4 are arranged at the bottoms of four corners of the cross base 3, a support rod 5 is fixedly connected to the center position of the top end of the cross base 3, the control box 2 is fixedly arranged on the support rod 5, a fixing mechanism 6 is arranged on the support rod 5, and a heating mechanism 7 is arranged at the top end of the support rod 5;

control box 2 includes control panel 8 and treater 9, treater 9 is connected with external power supply electricity, control panel 8 is connected with treater 9 electricity, treater 9 electricity is connected with two temperature sensor 10, one on the defeated blood vessel of dialysis machine is located to temperature sensor 10, another patient's body surface is located to temperature sensor 10, treater 9 electricity is connected with sphygmomanometer 11, treater 9 is used for controlling the heating temperature of heating mechanism 7.

It should be noted that the existing experimental data in the text "influence of dialysate temperature on comfort of hemodialysis patient" of the chinese nursing impurities in 12 th volume 47 th 12 th volume proves that the blood pressure of the patient is influenced by the dialysate temperature during dialysis, and the adoption of the dialysis temperature consistent with the measured body temperature is the best scheme because the patient is most comfortable at the temperature.

As a preferable scheme of the present invention, the heating mechanism 7 includes a first clamping block 12 and a second clamping block 13, a rotating shaft 14 is fixedly connected to one side of the first clamping block 12 close to the second clamping block 13, a sleeve ring 15 is fixedly connected to one side of the second clamping block 13 close to the first clamping block 12, the sleeve ring 15 is sleeved on the rotating shaft 14, a threaded groove 16 is formed on an outer surface of the rotating shaft 14, a sliding block 17 is fixedly connected to an inner surface of the sleeve ring 15, the sliding block 17 is located inside the threaded groove 16, a T-shaped fixture block 18 is rotatably connected to one side of the second clamping block 13 far from the sleeve ring 15, a clamping groove 19 for limiting displacement of the T-shaped fixture block 18 is formed on one side of the first clamping block 12 far from the rotating shaft 14, a heating block 20 is embedded on one side of the first clamping block 12 close to the second clamping block 13, an adapter tube 21 is clamped between the two heating blocks 20, the adapter tube 21 is of a hollow structure, and one end of the adapter tube 21 is communicated with a blood conveying pipe of the dialysis machine.

As a preferred scheme of the present invention, the adapter tube 21 includes a heating region 22, the heating region 22 is a diamond shape, the heating region 22 is located between two heating blocks 20, a distance between an upper wall and a lower wall of the heating region 22 is 1.3-1.5mm, the adapter tube 21 is made of a transparent high temperature resistant material, and the heating blocks 20 are electrically connected to the processor 9.

As a preferred scheme of the present invention, the fixing mechanism 6 includes a sliding sleeve 23 and a fixing arm 24, the sliding sleeve 23 is sleeved on the support column, the fixing arm 24 is fixedly installed on the sliding sleeve 23, one end of the fixing arm 24 far away from the sliding sleeve 23 is fixedly connected with a suspension wall 25, two fixing frames 26 are arranged on the suspension wall 25, one fixing frame 26 is fixedly installed at the top end of the suspension wall 25, and the other fixing frame 26 is sleeved on the suspension wall 25.

As a preferred embodiment of the present invention, a base 27 is fixedly connected to a bottom end of the suspension wall 25, a lifting motor 28 is fixedly connected to one end of the base 27 close to the fixing frame 26, an output end of the lifting motor 28 is fixedly connected to another fixing frame 26, and the lifting motor 28 is electrically connected to the processor 9.

As a preferable scheme of the present invention, a foldable handle 29 is disposed on the support rod 5, the foldable handle 29 includes a through rod 30, a limiting piece 31 and a spring 32, the through rod 30 penetrates through the support rod 5, the limiting piece 31 is fixedly mounted at one end of the through rod 30, the spring 32 is sleeved on the through rod 30, the spring 32 is located between the limiting piece 31 and the support rod 5, one end of the through rod 30, which is far away from the limiting piece 31, is fixedly connected with a first connecting rod 33, one side of the first connecting rod 33, which is close to the support rod 5, is symmetrically provided with contact blocks 34, a connecting shaft 35 is rotatably connected between the contact blocks 34, the connecting shaft 35 penetrates through the through rod 30, and the contact blocks 34 are connected with the support rod 5 in an abutting manner.

As a preferable scheme of the present invention, a reinforcing rod 36 is fixedly connected to a side of the first connecting rod 33 away from the supporting rod 5, a second connecting rod 37 is fixedly connected to one end of the reinforcing rod 36 away from the first connecting rod 33, the first connecting rod 33 and the second connecting rod 37 are parallel to each other, the reinforcing rod 36 is perpendicular to the first connecting rod 33, the reinforcing rod 36 is perpendicular to the second connecting rod 37, the foldable handle 29 further includes a U-shaped frame 38, two ends of the U-shaped frame 38 are respectively hinged to the first connecting rod 33 and the second connecting rod 37, a magnetic suction plate 39 is fixedly connected to a top end of the U-shaped frame 38, and the magnetic suction plate 39 is used for the U-shaped frame 38 to be close to the first connecting rod 33 and the second connecting rod 37.

As a preferable scheme of the present invention, the support rod 5 is a square prism, the contact block 34 is a cuboid, and the first link 33 and the second link 37 are both made of iron materials.

Before use, the U-shaped frame 38 is held by hands, the movable frame 1 is pushed to the head of a patient bed, the fixed frames 26 are close to the bedside, one fixed frame 26 is kept above the bed, the other fixed frame 26 is kept below the bed, the supporting rod 5 is kept still, the first connecting rod 33 is pulled towards the direction far away from the supporting rod 5 and rotates around the connecting shaft 35, then the two U-shaped frames 38 are rotated, the two U-shaped frames 38 are adsorbed on the first connecting rod 33 and the second connecting rod 37 under the action of the magnetic adsorption plate 39, more operating space occupied by a doctor can be reduced, the control panel 8 is operated to control the lifting motor 28 to be started, the two fixed frames 26 are pushed to be close to each other until the two fixed frames 26 clamp the bed edge, the phenomenon that the movable frame 1 is accidentally pushed, the connecting pipeline is torn off, an unused adapter tube 21 is taken out, one end of the adapter tube 21 is communicated with a blood conveying tube of a dialysis machine, the T-shaped fixture block 18 is pulled out from the clamping groove 19, then the second clamping block 13 is rotated, meanwhile, the slide block 17 in the lantern ring 15 slides in the threaded groove 16, so that the second clamping block 13 rotates and moves upwards, then the adapter tube 21 is placed on the first clamping block 12, the widest position of the heating area 22 is kept right above the first clamping block 12, then the second clamping block 13 is reset, the T-shaped fixture block 18 is rotated after reset to enter the clamping groove 19, the first clamping block 12 and the second clamping block 13 are fixed, the two temperature sensors 10 are respectively fixed on the body surface of a patient and a blood conveying pipe of a dialysis machine, and the arm band of the sphygmomanometer 11 is tied to the arm of the patient.

When the blood pressure monitoring device works, the temperature sensor 10 arranged on the body surface of a patient measures the body temperature before hemodialysis and transmits the body temperature to the processor 9, the processor 9 collects the blood pressure of the patient before hemodialysis in the sphygmomanometer 11, then the processor 9 controls the heating block 20 to have the same temperature as the body side temperature according to the data of the temperature sensor 10 arranged on the blood conveying pipe, when the blood pressure of the patient is higher than 10% of the blood pressure of the hemodialysis precursor side, the processor 9 sends a temperature increasing command to control the heating block 20 to increase in temperature once, the temperature change range of each time is 0.1-0.3 ℃, the command interval of each time is 5-10min, the accumulated increasing temperature is not more than 0.6 ℃ until the blood pressure of the patient is reduced, when the blood pressure of the patient is lower than 10% of the blood pressure of the dialysis precursor side, the processor 9 sends a temperature reducing command to control the heating block 20 to reduce in temperature once, the temperature change range of each time is 0.1-0.3 ℃, the command interval is 5-10min each time, the accumulated reduced temperature is not more than 0.6 ℃, the processor 9 can control the heating block 20 along with the change of the blood pressure of the patient so as to change the temperature of the dialysate, thus reducing the probability of adverse reaction of the patient and enhancing the use comfort of the patient.

In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and simplifications made in the spirit of the present invention are intended to be included in the scope of the present invention.

Claims

1. A plasma heating device for blood purification is characterized by comprising a moving frame (1), wherein a control box (2) is arranged on the moving frame (1), the moving frame (1) comprises a cross-shaped base (3), pulleys (4) are arranged at the bottoms of four corners of the cross-shaped base (3), a supporting rod (5) is fixedly connected to the center position of the top end of the cross-shaped base (3), the control box (2) is fixedly arranged on the supporting rod (5), a fixing mechanism (6) is arranged on the supporting rod (5), and a heating mechanism (7) is arranged at the top end of the supporting rod (5);

control box (2) include control panel (8) and treater (9), control panel (8) are connected with treater (9) electricity, treater (9) electricity is connected with two temperature sensor (10), one on the blood transfusion pipe of dialysis machine is located in temperature sensor (10), another patient's body surface is located in temperature sensor (10), treater (9) electricity is connected with sphygmomanometer (11), treater (9) are used for controlling the heating temperature of heating mechanism (7).

2. The plasma heating device for blood purification according to claim 1, wherein the heating mechanism (7) comprises a first clamping block (12) and a second clamping block (13), a rotating shaft (14) is fixedly connected to one side of the first clamping block (12) close to the second clamping block (13), a sleeve ring (15) is fixedly connected to one side of the second clamping block (13) close to the first clamping block (12), the sleeve ring (15) is sleeved on the rotating shaft (14), a threaded groove (16) is formed in the outer surface of the rotating shaft (14), a sliding block (17) is fixedly connected to the inner surface of the sleeve ring (15), the sliding block (17) is located inside the threaded groove (16), a T-shaped clamping block (18) is rotatably connected to one side of the second clamping block (13) far from the sleeve ring (15), a clamping groove (19) for limiting the displacement of the T-shaped clamping block (18) is formed in one side of the first clamping block (12) far from the rotating shaft (14), first grip block (12) and second grip block (13) one side gomphosis that is close to each other have heating piece (20), two the centre gripping has switching pipe (21) between heating piece (20), switching pipe (21) are hollow structure, the one end of switching pipe (21) communicates with the blood transfusion pipe of dialysis machine.

3. The plasma heating device for blood purification according to claim 2, wherein the adapter tube (21) comprises a heating area (22), the heating area (22) is diamond-shaped, the heating area (22) is located between two heating blocks (20), the distance between the upper wall and the lower wall of the heating area (22) is 1.3-1.5mm, the adapter tube (21) is made of transparent high temperature resistant material, and the heating blocks (20) are electrically connected with the processor (9).

4. The plasma heating device for blood purification according to claim 1, wherein the fixing mechanism (6) comprises a sliding sleeve (23) and a fixing arm (24), the sliding sleeve (23) is sleeved on the supporting column, the fixing arm (24) is fixedly installed on the sliding sleeve (23), one end of the fixing arm (24) far away from the sliding sleeve (23) is fixedly connected with a suspension wall (25), two fixing frames (26) are arranged on the suspension wall (25), one fixing frame (26) is fixedly installed at the top end of the suspension wall (25), and the other fixing frame (26) is sleeved on the suspension wall (25).

5. The plasma heating device for blood purification according to claim 4, wherein a base (27) is fixedly connected to the bottom end of the suspension wall (25), a lifting motor (28) is fixedly connected to one end of the base (27) close to the fixing frame (26), the output end of the lifting motor (28) is fixedly connected to the other fixing frame (26), and the lifting motor (28) is electrically connected to the processor (9).

6. The plasma heating device for blood purification according to claim 1, wherein the support rod (5) is provided with a foldable handle (29), the foldable handle (29) comprises a through rod (30), a limiting piece (31) and a spring (32), the through rod (30) penetrates through the support rod (5), the limiting piece (31) is fixedly installed at one end of the through rod (30), the spring (32) is sleeved on the through rod (30), the spring (32) is located between the limiting piece (31) and the support rod (5), one end of the through rod (30) far away from the limiting piece (31) is fixedly connected with a first connecting rod (33), one side of the first connecting rod (33) close to the support rod (5) is symmetrically provided with contact blocks (34), a connecting shaft (35) is rotatably connected between the contact blocks (34), and the connecting shaft (35) penetrates through the through rod (30), the contact block (34) is connected with the support rod (5) in an interference mode.

7. Plasma heating device according to claim 6, characterized in that a reinforcing rod (36) is fixedly connected to the side of the first connecting rod (33) remote from the support rod (5), one end of the reinforcing rod (36) far away from the first connecting rod (33) is fixedly connected with a second connecting rod (37), the first connecting rod (33) and the second connecting rod (37) are parallel to each other, the reinforcing rod (36) and the first connecting rod (33) are perpendicular to each other, the reinforcing rod (36) and the second connecting rod (37) are perpendicular to each other, the foldable handle (29) further comprises a U-shaped frame (38), two ends of the U-shaped frame (38) are respectively hinged with the first connecting rod (33) and the second connecting rod (37), the magnetic attraction plate (39) is fixedly connected to the top end of the U-shaped frame (38), and the magnetic attraction plate (39) is used for enabling the U-shaped frame (38) to be close to the first connecting rod (33) and the second connecting rod (37) in an adsorption mode.

8. The plasma heating device for blood purification according to claim 7, wherein the support rod (5) is a square prism, the contact block (34) is a cuboid, and the first connecting rod (33) and the second connecting rod (37) are both made of iron material.