ECMO blood heating device

Abstract

The invention relates to the technical field of blood heating, and discloses an ECMO blood heating device which comprises a box body, a heating mechanism arranged in the box body, a heating box arranged on the heating mechanism and a heating hose arranged on the heating box and used for heating blood. A driving assembly and a reciprocating assembly are further arranged in the box body, and a conversion assembly is arranged in the heating box and located on the periphery of the heating hose; and a fixing frame is fixedly mounted in the box body. According to the ECMO blood heating device, when the wavy guide groove in the changing part moves left and right on the heating hose, periodical extrusion and drawing force is applied to the heating hose, blood is continuously mixed in the hose, the position of the blood is changed, the original relatively fixed flowing area of the blood is broken through the mechanical action, and the blood heating efficiency is improved. The middle blood and the peripheral blood can be in full contact and exchange heat, so that the temperature distribution of the blood in the whole blood tube is more uniform, and the local temperature difference is effectively eliminated.

Description

Technical Field

[0001] The present invention belongs to the technical field of blood warming, and in particular relates to an ECMO blood warming device. Background Art

[0002] In the field of extracorporeal membrane oxygenation technology, the ECMO blood warming device is a key equipment to ensure that the temperature of the extracorporeal circulating blood is appropriate and to maintain the stability of the patient's physiological functions. ECMO technology, as an advanced life support method, is mainly used to provide continuous extracorporeal respiratory and circulatory support for patients with severe cardiopulmonary failure. In the ECMO system, the patient's blood is drawn out of the body, passes through the oxygenator for gas exchange, and then is returned to the patient's body. Due to the heat exchange between the blood and the external environment during the extracorporeal circulation process, the blood temperature will gradually decrease. If the blood is not heated in time, the return of low-temperature blood to the patient's body will cause a series of serious problems. Therefore, effectively warming the ECMO extracorporeal circulating blood to ensure that the blood temperature is maintained in an appropriate range is of vital importance to protecting the patient's life safety and improving the ECMO treatment effect.

[0003] At present, traditional ECMO blood warming mostly uses a water bath heating method to heat the blood. This heating method uses circulating constant temperature water to indirectly contact the tubes that wrap the blood, and uses the principle of heat conduction to transfer heat to the blood. However, in actual application, this method has many significant disadvantages and shortcomings. First, since the blood is in a continuous flow state in the blood tube and the blood flow in the blood tube is not absolutely uniform, the blood near the periphery of the blood tube is in closer contact with the tube wall and can more fully exchange heat with the constant temperature water, so the heating effect is relatively good. However, the blood in the middle part of the blood tube is far away from the tube wall, and heat transfer is relatively difficult, resulting in poor heating effect of this part of the blood, and then the temperature uniformity of the blood on the cross-section of the blood tube is poor. This temperature unevenness may not only affect the physiological function of the blood, but may also cause damage to blood components due to local excessively high or low temperatures. Therefore, there are shortcomings and it cannot meet the use needs of medical staff. Therefore, further improvement is necessary.

[0004] Therefore, in view of this, research and improvement are conducted on the existing structure and deficiencies, and an ECMO blood warming device is provided in order to achieve a more practical purpose. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides an ECMO blood warming device, which is achieved by the following specific technical means:

[0006] An ECMO blood warming device comprises a housing, a heating mechanism disposed inside the housing, and a warming box disposed on the heating mechanism, and further comprising a warming hose disposed on the warming box for warming blood;

[0007] The interior of the box is further provided with a driving assembly and a reciprocating assembly, and the interior of the heating box and the periphery of the heating hose are provided with a conversion assembly;

[0008] A fixing frame is fixedly installed inside the box;

[0009] The reciprocating assembly includes a guide slide rail fixedly mounted on a fixed frame, and a reciprocating turntable fixedly mounted on a driving assembly, a guide slider is slidably mounted on the guide slide rail, a reciprocating slider is fixedly mounted on the guide slider, a movable rod is movably mounted on the reciprocating turntable, an end of the movable rod away from the reciprocating turntable is movably connected to the reciprocating slider, a reciprocating rod is fixedly mounted on the reciprocating slider, an end of the reciprocating rod away from the reciprocating slider extends to the interior of the heating box and is fixedly connected to the conversion assembly, and the driving assembly can drive the reciprocating rod to drive the conversion assembly to move back and forth on the heating hose, and the blood flow area in the heating hose can be continuously and dynamically adjusted during movement.

[0010] As a further description of the above technical solution: when the wavy guide groove inside the transformation component moves left and right on the heating hose, periodic extrusion and stretching forces are applied to the heating hose, so that the blood in the tube is constantly mixed and exchanged. Through this mechanical action, the originally relatively fixed flow area of the blood is broken, allowing the middle and peripheral blood to fully contact and exchange heat, thereby making the blood temperature distribution in the entire blood tube more uniform, effectively eliminating local temperature differences.

[0011] Furthermore, the heating mechanism includes a heating box fixedly assembled inside the box body, and the heating box is provided with warm water for heating the blood water bath. A heater is fixedly installed on the front side of the heating box, and a heating tube is fixedly connected to one side of the heater, and the heating tube is located inside the heating box.

[0012] As a further description of the above technical solution: heat energy is generated by the heater, and the heat energy is dissipated to the surrounding environment in the heating box through the heating tube, thereby heating the water in the heating box, which is beneficial to warming the blood.

[0013] Furthermore, a temperature sensor for monitoring the water temperature is provided inside the heating box.

[0014] As a further description of the above technical solution: In order to ensure that the water temperature is stable at the set value, a temperature sensor is provided in the heating box, and the water temperature in the heating box can be monitored in real time through the temperature sensor.

[0015] Furthermore, a fixing groove is provided on the side wall of the heating box, and a sliding block is slidably installed on the fixing groove, and a foldable waterproof part is connected between the left and right sides of the sliding block and the fixing groove wall of the heating box;

[0016] The sliding block is sleeved on the outer periphery of the reciprocating rod.

[0017] As a further description of the above technical solution: the provision of a foldable waterproof part can prevent water from flowing out, further improving its applicability.

[0018] Furthermore, a circulation assembly is provided on the upper side of the heating box, and the circulation assembly includes a circulation pump fixedly mounted on the upper side of the heating box, the input end of the circulation pump is connected to the heating box, the output end of the circulation pump is fixedly connected to a first water pipe, the first water pipe extends to the interior of the heating box at one end away from the circulation pump, and a second water pipe is fixedly installed on the left side of the heating box, and the lower end of the second water pipe is connected to the heating box.

[0019] As a further description of the above technical solution: warm water is sprayed into the heating box through the first water pipe, thereby heating the blood in the heating hose. At the same time, the flow direction of the warm water is opposite to the flow direction of the blood in the heating hose, so that the two form a countercurrent flow state, and the countercurrent heating method helps to reduce the temperature gradient on the cross section of the blood hose, making the blood temperature distribution more uniform, so that a high heat exchange efficiency can be maintained throughout the entire heating process, so that the blood can obtain more sufficient heat.

[0020] Furthermore, the driving assembly includes a driving frame fixedly mounted on the upper side of the heating box, a driving shaft is rotatably mounted on the driving frame, and the driving shaft passes through the heating box, a driving impeller is fixedly mounted on the driving shaft, and the driving impeller is located in the heating box.

[0021] As a further description of the above technical solution: the reciprocating component and the extrusion component can be driven by the arrangement of the driving impeller.

[0022] Furthermore, the driving impeller is arranged corresponding to the first water pipe, and the water flow sprayed through the first water pipe can cause the driving impeller to rotate.

[0023] As a further description of the above technical solution: under the action of water flow, the driving impeller starts to rotate, thereby driving the driving shaft to rotate synchronously, thereby driving the reciprocating component and the extrusion component.

[0024] Furthermore, the conversion assembly includes a conversion component, a fixed block is fixedly installed on the upper side of the conversion component, the outer side of the fixed block is fixedly connected to the reciprocating rod, and a guide groove is opened inside the conversion component, and the guide groove is wavy.

[0025] As a further description of the above technical solution: this setting can change the flow path of blood in the heating hose, forcing the blood originally in the middle and the periphery to flow towards each other, thereby achieving position change.

[0026] Furthermore, an extrusion assembly is provided on the driving assembly, and the extrusion assembly includes an extrusion wheel fixedly mounted on the driving shaft, and a support block fixedly mounted inside the heating box. The extrusion wheel is provided with a number of evenly distributed extrusion protrusions, and when the extrusion wheel rotates, the extrusion protrusions are driven to intermittently extrude the heating hose.

[0027] As a further description of the above technical solution: this setting can drive the heating hose to deform, and in the area where the heating hose is deformed, the flowing blood will generate turbulence. The emergence of turbulence intensifies the relative movement between the blood and the wall of the heating hose, thereby breaking the laminar boundary layer and allowing the middle blood to contact the wall more frequently, further increasing the heat exchange area and improving the heat convection heat transfer efficiency.

[0028] Furthermore, a control chassis is fixedly mounted on the front side of the box body, a control panel for operation is provided on the front side of the control chassis, and a box door is provided on the upper side of the box body;

[0029] An input interface and an output interface for connecting a blood tube are respectively provided on the left and right sides of the box.

[0030] As a further description of the above technical solution: the two ends of the blood tube can be connected to the input interface and output interface on the left and right sides of the box respectively to complete the construction of the blood flow path, and the setting of the control panel is conducive to the control of the equipment.

[0031] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0032] 1. When the ECMO blood warming device moves left and right on the heating hose through the wavy guide groove inside the conversion component, it applies periodic squeezing and stretching forces to the heating hose, causing the blood to continuously mix and exchange positions in the tube. This mechanical action breaks the originally relatively fixed flow area of the blood, allowing the middle and peripheral blood to fully contact and exchange heat, thereby making the blood temperature distribution in the entire blood tube more uniform and effectively eliminating local temperature differences.

[0033] 2. This ECMO blood warming device drives the flow direction of blood and the flow direction of warm water to flow in the opposite direction, forming a countercurrent flow state. In the entire heating hose section, the temperature difference between blood and warm water can be maintained at a larger value for a longer time. This temperature difference provides continuous power for the transfer of heat from warm water to blood, making the heat exchange process more efficient. The blood can absorb heat more quickly, shortening the heating time and improving the treatment efficiency. In addition, the use of countercurrent heating method helps to reduce the temperature gradient on the cross section of the heating hose, making the blood temperature distribution more uniform.

[0034] 3. This ECMO blood warming device drives the extrusion convex part to intermittently squeeze the heating hose when the extrusion wheel rotates, causing the heating hose to deform and causing turbulence in the flowing blood in the area where the heating hose is deformed. The emergence of turbulence intensifies the relative movement between the blood and the wall of the heating hose, breaking the laminar boundary layer and allowing the blood in the middle to contact the tube wall more frequently, thereby further increasing the heat exchange area and improving the heat convection heat transfer efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 It shows a schematic diagram of the overall three-dimensional structure provided by an embodiment of the present invention;

[0037] Figure 2 A schematic diagram of the internal structure of a box provided in an embodiment of the present invention is shown;

[0038] Figure 3 A schematic diagram of the installation structure of the heating mechanism and the heating box provided in an embodiment of the present invention is shown;

[0039] Figure 4 A schematic diagram of the internal structure of a heating mechanism provided in an embodiment of the present invention is shown;

[0040] Figure 5 It shows a schematic diagram of the installation structure of the heating box and the heating hose provided in an embodiment of the present invention;

[0041] Figure 6 A schematic diagram of the internal structure of a heating box according to an embodiment of the present invention is shown;

[0042] Figure 7 A schematic diagram of the installation structure of a drive assembly and a reciprocating assembly according to an embodiment of the present invention is shown;

[0043] Figure 8 A schematic diagram of the installation structure of the drive assembly and the extrusion assembly provided in an embodiment of the present invention is shown;

[0044] Figure 9 It shows a schematic structural diagram of a reciprocating assembly provided according to an embodiment of the present invention;

[0045] Figure 10 A schematic diagram of the installation structure of the reciprocating rod and the conversion assembly according to an embodiment of the present invention is shown;

[0046] Figure 11 A schematic diagram of a local structure of a transformation component provided according to an embodiment of the present invention is shown.

[0047] Legend:

[0048] 10. Box body; 11. Control box; 12. Box door; 13. Fixing bracket;

[0049] 20. Heating mechanism; 21. Heating box; 22. Heater; 23. Heating tube; 24. Temperature sensor;

[0050] 30. Heating box; 31. Sliding block; 32. Folding waterproof part;

[0051] 40. Heating hose;

[0052] 50. Circulation assembly; 51. Circulation pump; 52. First water pipe; 53. Second water pipe;

[0053] 60. Drive assembly; 61. Drive frame; 62. Drive shaft; 63. Drive impeller;

[0054] 70. Reciprocating assembly; 71. Guide rail; 72. Guide slider; 73. Reciprocating slider; 74. Reciprocating turntable; 75. Movable rod; 76. Reciprocating rod;

[0055] 80. Transformation assembly; 81. Transformation component; 82. Fixing block; 83. Guide groove;

[0056] 90. Extrusion assembly; 91. Extrusion wheel; 92. Support block; 93. Extrusion protrusion. DETAILED DESCRIPTION

[0057] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0058] See also Figures 1 to 11, an ECMO blood warming device, comprising a box body 10, a heating mechanism 20 arranged inside the box body 10, and a heating box 30 arranged on the heating mechanism 20, and also comprising a heating hose 40 arranged on the heating box 30 for heating blood; a driving assembly 60 and a reciprocating assembly 70 are further provided inside the box body 10, and a conversion assembly 80 is provided inside the heating box 30 and on the periphery of the heating hose 40; a fixing frame 13 is fixedly installed inside the box body 10; the reciprocating assembly 70 comprises a guide rail 71 fixedly assembled on the fixing frame 13, and a reciprocating turntable 74 fixedly assembled on the driving assembly 60, a guide slider 72 is slidably mounted on the guide rail 71, a reciprocating slider 73 is fixedly mounted on the guide slider 72, and a movable rod 75 is movably mounted on the reciprocating turntable 74, and the movable rod 75 is away from one end of the reciprocating turntable 74 It is movably connected to the reciprocating slider 73, and a reciprocating rod 76 is fixedly installed on the reciprocating slider 73. The reciprocating rod 76 extends from one end of the reciprocating slider 73 to the interior of the heating box 30 and is fixedly connected to the conversion component 80. The driving component 60 can drive the reciprocating rod 76 to drive the conversion component 80 to move back and forth on the heating hose 40, and can continuously and dynamically adjust the blood flow area in the heating hose 40 during movement; when the wavy guide groove 83 inside the conversion component 81 moves left and right on the heating hose 40, periodic squeezing and stretching forces are applied to the heating hose 40, so that the blood is continuously mixed and exchanged positions in the tube. Through this mechanical action, the originally relatively fixed flow area of the blood is broken, allowing the intermediate and peripheral blood to fully contact and exchange heat, thereby making the blood temperature distribution in the entire blood tube more uniform, effectively eliminating local temperature differences.

[0059] See also Figure 1 A control box 11 is fixedly mounted on the front side of the box 10, and a control panel for operation is provided on the front side of the control box 11. A box door 12 is provided on the upper side of the box 10; input interfaces and output interfaces for connecting blood tubes are respectively provided on the left and right sides of the box 10; the two ends of the blood tube can be connected to the input interfaces and output interfaces on the left and right sides of the box 10 respectively to complete the construction of the blood circulation path, and the setting of the control panel is conducive to the control of the equipment.

[0060] See also Figures 2 to 4 The heating mechanism 20 includes a heating box 21 fixedly assembled inside the box body 10, and the heating box 21 is provided with warm water for heating the blood in a water bath. A heater 22 is fixedly installed on the front side of the heating box 21, and a heating pipe 23 is fixedly connected to one side of the heater 22. The heating pipe 23 is located in the heating box 21; after starting the heater 22, the heater 22 starts to run and generates heat energy. The heat energy is dissipated to the surrounding environment in the heating box 21 through the heating pipe 23, thereby heating the water in the heating box 21, which is beneficial to heating the blood.

[0061] See also Figure 4 A temperature sensor 24 for monitoring the water temperature is provided inside the heating box 21; to ensure that the water temperature is stable at the set value, a temperature sensor 24 is provided in the heating box 21. The temperature sensor 24 can monitor the water temperature in the heating box 21 in real time. When the monitored water temperature is lower than the set temperature, the temperature sensor 24 sends a message to drive the heater 22 to continue running and heat the water in the heating box 21 to the specified temperature; when the water temperature reaches the set standard, the temperature sensor 24 sends a message again to stop the heater 22 from running, thereby achieving precise control of the water temperature and maintaining the water in the heating box 21 in a constant temperature water state.

[0062] See also Figures 5 and 6 A fixed groove is provided on the side wall of the heating box 30, and a sliding block 31 is slidably installed on the fixed groove. A folding waterproof part 32 is connected between the left and right sides of the sliding block 31 and the fixed groove wall of the heating box 30; the sliding block 31 is sleeved on the outer periphery of the reciprocating rod 76; the setting of the folding waterproof part 32 can prevent water from flowing out.

[0063] See also Figures 3 to 6 , a circulation assembly 50 is provided on the upper side of the heating box 21, and the circulation assembly 50 includes a circulation pump 51 fixedly assembled on the upper side of the heating box 21, the input end of the circulation pump 51 is connected to the heating box 21, and the output end of the circulation pump 51 is fixedly connected to a first water pipe 52, and the end of the first water pipe 52 away from the circulation pump 51 extends to the interior of the heating box 30, and a second water pipe 53 is fixedly installed on the left side of the heating box 30, and the lower end of the second water pipe 53 is connected to the heating box 21; when blood flows in the heating hose 40, the circulation pump 51 is started, and the circulation pump 51 It starts working, driving the warm water in the heating box 21 to be transmitted through the first water pipe 52, and the warm water is sprayed into the heating box 30 through the first water pipe 52, thereby heating the blood in the heating hose 40. In addition, the flow direction of the warm water is opposite to the flow direction of the blood in the heating hose 40, so that the two form a countercurrent flow state, and the countercurrent heating method helps to reduce the temperature gradient on the cross section of the blood hose, making the blood temperature distribution more uniform, so that a high heat exchange efficiency can be maintained throughout the heating process, so that the blood can obtain more sufficient heat.

[0064] See also Figures 6 to 8 The driving assembly 60 includes a driving frame 61 fixedly mounted on the upper side of the heating box 21, and a driving shaft 62 is rotatably mounted on the driving frame 61, and the driving shaft 62 passes through the heating box 30, and a driving impeller 63 is fixedly mounted on the driving shaft 62, and the driving impeller 63 is located in the heating box 30; the driving impeller 63 can drive the driving shaft 62 to rotate synchronously, thereby driving the reciprocating assembly 70 and the extrusion assembly 90.

[0065] See also Figure 6The driving impeller 63 is arranged corresponding to the first water pipe 52, and the water flow sprayed through the first water pipe 52 can cause the driving impeller 63 to rotate; the water flow sprayed through the first water pipe 52 comes into contact with the driving impeller 63 while entering the heating box 30. Under the action of the water flow, the driving impeller 63 starts to rotate, thereby driving the driving shaft 62 to rotate synchronously, thereby driving the reciprocating component 70 and the extrusion component 90.

[0066] See also Figures 10 and 11 The conversion assembly 80 includes a conversion component 81, a fixed block 82 is fixedly installed on the upper side of the conversion component 81, and the outer side of the fixed block 82 is fixedly connected to the reciprocating rod 76. A guide groove 83 is opened inside the conversion component 81, and the guide groove 83 is wavy. When the conversion component 81 moves left and right on the heating hose 40, the wavy guide groove 83 applies periodic extrusion and stretching forces to the heating hose 40. In the extrusion area, the diameter of the heating hose 40 becomes smaller, and the blood is squeezed and flows to the surrounding area. In the stretching area, the diameter of the heating hose 40 becomes larger, and the blood will be replenished to the middle area. Through this mechanical action, the flow path of the blood in the heating hose 40 is changed, forcing the blood originally in the middle and periphery to flow to each other, thereby realizing position change.

[0067] See also Figures 6 to 8 The driving assembly 60 is provided with an extrusion assembly 90, which includes an extrusion wheel 91 fixedly assembled on the driving shaft 62, and a support block 92 fixedly assembled inside the heating box 30. The extrusion wheel 91 is provided with a number of evenly distributed extrusion protrusions 93, which drive the extrusion protrusions 93 to intermittently extrude the heating hose 40 when the extrusion wheel 91 rotates; when the extrusion wheel 91 rotates, the extrusion protrusions 93 intermittently extrude the heating hose 40, driving the heating hose 40 to deform. In the area where the heating hose 40 is deformed, turbulence will be generated in the flowing blood. The emergence of turbulence will intensify the relative movement between the blood and the wall of the heating hose 40, thereby breaking the laminar boundary layer and allowing the middle blood to contact the wall more frequently, further increasing the heat exchange area and improving the heat convection heat exchange efficiency.

[0068] The specific usage and function of this embodiment are as follows:

[0069] Working principle: When in use, first connect the two ends of the blood tube to the input interface and the output interface on the left and right sides of the box 10 respectively to complete the construction of the blood circulation path. Then, set the required rated temperature by operating the control panel on the control box 11. The rated temperature is accurately set according to the patient's treatment needs and the normal physiological temperature range of the blood; after starting the heater 22, the heater 22 starts to run and generates heat energy. The heat energy is dissipated to the surrounding environment in the heating box 21 through the heating tube 23, thereby heating the water in the heating box 21. To ensure that the water temperature is stable at the set value, a temperature sensor 24 is provided in the heating box 21. The temperature sensor 24 can monitor the water temperature in the heating box 21 in real time. When the monitored water temperature is lower than the set temperature, the temperature sensor 24 sends a signal to drive the heater 22 to continue running and heat the water in the heating box 21 to the specified temperature; when the water temperature reaches the set standard, the temperature sensor 24 sends a signal again to stop the heater 22 from running, thereby achieving precise control of the water temperature and maintaining the water in the heating box 21 at a constant temperature.

[0070] When the blood flows in the heating hose 40, the circulation pump 51 is started, and the circulation pump 51 starts to work, driving the warm water in the heating box 21 to be transmitted through the first water pipe 52, and the warm water is sprayed into the heating box 30 through the first water pipe 52, thereby heating the blood in the heating hose 40. In addition, the flow direction of the warm water is opposite to the flow direction of the blood in the heating hose 40, so that the two form a countercurrent flow state; in the countercurrent flow state, the temperature difference between the blood and the warm water can be maintained at a large value for a longer time in the entire heating hose 40 section. Since the blood temperature is lower and the warm water temperature is higher at the inlet of the heating hose 40, there is a The large temperature difference provides good conditions for efficient heat transfer. As the blood and warm water flow in opposite directions, although their temperatures gradually approach each other, due to the countercurrent characteristics, the blood temperature rises at the outlet of the heating hose 40, while the temperature of the warm water in contact with it drops somewhat compared to the inlet, but a certain temperature difference is still maintained. As a result, a high heat exchange efficiency can be maintained throughout the entire heating process, allowing the blood to absorb heat more fully. In addition, the countercurrent heating method helps to reduce the temperature gradient across the cross section of the blood hose, making the blood temperature distribution more uniform. As a result, a high heat exchange efficiency can be maintained throughout the heating process, allowing the blood to obtain more sufficient heat.

[0071] In addition, the water flow ejected from the first water pipe 52 comes into contact with the driving impeller 63 when entering the heating box 30. Under the force of the water flow, the driving impeller 63 starts to rotate, thereby driving the driving shaft 62 to rotate synchronously. The rotation of the driving shaft 62 further drives the reciprocating turntable 74 to rotate. The rotation of the reciprocating turntable 74 drives the movable rod 75 to move. The other end of the movable rod 75 is connected to the reciprocating slider 73. Under the pushing action of the movable rod 75, the reciprocating slider 73 and the guide slider 72 connected thereto slide back and forth on the guide rail 71.

[0072] Since blood flow easily forms a laminar boundary layer, the blood flow velocity near the wall of the heating hose 40 is slow, and the heat exchange with the wall of the heating hose 40 is relatively sufficient, but the blood flow velocity in the middle is fast and the distance from the tube wall is far, so the heat exchange efficiency is low; during the sliding process of the reciprocating slider 73, the reciprocating rod 76 drives the conversion component 81 to slide left and right on the heating hose 40. A wavy guide groove 83 is provided inside the conversion component 81. When the conversion component 81 moves left and right on the heating hose 40, the wavy guide groove 83 applies periodic squeezing and stretching forces to the heating hose 40; in the squeezing area, the diameter of the heating hose 40 becomes smaller, and the blood is squeezed and flows to the surrounding area; in the stretching area, the diameter of the heating hose 40 becomes larger, Blood will be replenished to the middle area. This mechanical action changes the blood flow path within the heating hose 40, forcing the blood originally in the middle and peripheral areas to flow towards each other, achieving a position change. At the same time, the squeezing and stretching caused by the wave deformation will generate fluid dynamic disturbances, causing eddies and mixed flows to form within the blood. These eddies and mixed flows further promote blood mixing and position exchange, breaking up the relatively fixed blood flow area and allowing the middle and peripheral blood to fully contact and exchange heat. This makes the blood temperature distribution more uniform throughout the blood tube, reduces local temperature differences, and reduces the possibility of blood damage due to temperature unevenness, thereby ensuring the safety and stability of the heating process.

[0073] During the rotation of the drive shaft 62, the extrusion wheel 91 is also driven to rotate. An extrusion protrusion 93 is provided on the extrusion wheel 91. When the extrusion wheel 91 rotates, the extrusion protrusion 93 intermittently squeezes the heating hose 40, driving the heating hose 40 to deform. In the area where the heating hose 40 is deformed, the flowing blood will produce turbulence. The emergence of turbulence intensifies the relative movement between the blood and the wall of the heating hose 40, thereby breaking the laminar boundary layer and allowing the middle blood to contact the wall more frequently, further increasing the heat exchange area and improving the heat convection heat transfer efficiency.

[0074] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to the specific embodiments described. Obviously, many modifications and variations are possible based on the content of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. An ECMO blood warming device, comprising a housing (10), a heating mechanism (20) disposed inside the housing (10), and a warming box (30) disposed on the heating mechanism (20), characterized in that: It also includes a heating hose (40) disposed on the heating box (30) for heating the blood; A driving assembly (60) and a reciprocating assembly (70) are further provided inside the box (10), and a conversion assembly (80) is provided inside the heating box (30) and on the periphery of the heating hose (40); A fixing frame (13) is fixedly installed inside the box (10); The reciprocating assembly (70) comprises a guide rail (71) fixedly mounted on a fixed frame (13), and a reciprocating turntable (74) fixedly mounted on a driving assembly (60), a guide slider (72) being slidably mounted on the guide rail (71), a reciprocating slider (73) being fixedly mounted on the guide slider (72), and a movable rod (75) being movably mounted on the reciprocating turntable (74), and an end of the movable rod (75) away from the reciprocating turntable (74) being in contact with the reciprocating slide. The block (73) is movably connected, and a reciprocating rod (76) is fixedly installed on the reciprocating slider (73). The reciprocating rod (76) extends from one end of the reciprocating slider (73) to the interior of the heating box (30) and is fixedly connected to the conversion component (80). The reciprocating rod (76) can be driven by the driving component (60) to drive the conversion component (80) to move back and forth on the heating hose (40), and the blood flow area in the heating hose (40) can be continuously and dynamically adjusted during the movement.

2. An ECMO blood warming device according to claim 1, characterized in that: The heating mechanism (20) includes a heating box (21) fixedly assembled inside the box body (10), and the heating box (21) is provided with warm water for heating the blood in a water bath. A heater (22) is fixedly installed on the front side of the heating box (21), and a heating pipe (23) is fixedly connected to one side of the heater (22). The heating pipe (23) is located inside the heating box (21).

3. An ECMO blood warming device according to claim 2, characterized in that: A temperature sensor (24) for monitoring the water temperature is provided inside the heating box (21).

4. The ECMO blood warming device according to claim 1, characterized in that: A fixing groove is provided on the side wall of the heating box (30), and a sliding block (31) is slidably installed on the fixing groove. A foldable waterproof part (32) is connected between the left and right sides of the sliding block (31) and the fixing groove wall of the heating box (30); The sliding block (31) is sleeved on the outer periphery of the reciprocating rod (76).

5. The ECMO blood warming device according to claim 2, characterized in that: A circulation assembly (50) is provided on the upper side of the heating box (21), and the circulation assembly (50) includes a circulation pump (51) fixedly assembled on the upper side of the heating box (21), the input end of the circulation pump (51) is connected to the heating box (21), and the output end of the circulation pump (51) is fixedly connected to a first water pipe (52), and the end of the first water pipe (52) away from the circulation pump (51) extends to the interior of the heating box (30), and a second water pipe (53) is fixedly installed on the left side of the heating box (30), and the lower end of the second water pipe (53) is connected to the heating box (21).

6. An ECMO blood warming device according to claim 2, characterized in that: The driving assembly (60) includes a driving frame (61) fixedly mounted on the upper side of the heating box (21), a driving shaft (62) rotatably mounted on the driving frame (61), and the driving shaft (62) passes through the heating box (30), a driving impeller (63) fixedly mounted on the driving shaft (62), and the driving impeller (63) is located in the heating box (30).

7. An ECMO blood warming device according to claim 6, characterized in that: The driving impeller (63) is arranged corresponding to the first water pipe (52), and the water flow ejected through the first water pipe (52) can cause the driving impeller (63) to rotate.

8. The ECMO blood warming device according to claim 1, characterized in that: The conversion assembly (80) includes a conversion component (81), a fixed block (82) is fixedly installed on the upper side of the conversion component (81), the outer side of the fixed block (82) is fixedly connected to the reciprocating rod (76), and a guide groove (83) is provided inside the conversion component (81), and the guide groove (83) is wavy.

9. The ECMO blood warming device according to claim 6, characterized in that: The driving assembly (60) is provided with an extrusion assembly (90), and the extrusion assembly (90) includes an extrusion wheel (91) fixedly mounted on the driving shaft (62), and a support block (92) fixedly mounted inside the heating box (30). The extrusion wheel (91) is provided with a plurality of evenly distributed extrusion protrusions (93), and when the extrusion wheel (91) rotates, the extrusion protrusions (93) are driven to intermittently extrude the heating hose (40).

10. The ECMO blood warming device according to claim 1, characterized in that: A control box (11) is fixedly mounted on the front side of the box body (10), a control panel for operation is provided on the front side of the control box (11), and a box door (12) is provided on the upper side of the box body (10); An input interface and an output interface for connecting a blood tube are respectively provided on the left and right sides of the box body (10).

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