Heat preservation device and system for general anesthesia

Abstract

The invention relates to the technical field of medical equipment, in particular to a heat preservation device and system used in general anesthesia, the device comprises a main machine and a heating blanket, a controller is arranged on the main machine, a slide rheostat is electrically connected between the main machine and a power source, a transmission cavity is formed in the slide rheostat, and a buckle is fixedly connected to the bottom of the transmission cavity; symmetrically-arranged supporting columns are fixedly connected to the buckle, a bimetallic strip is arranged on the side, close to the supporting columns, of the buckle, the two sides of the bimetallic strip are fixedly connected with the side walls of the supporting columns correspondingly, a push rod is fixedly connected to the top of the bimetallic strip, a rack is fixedly connected to the push rod and engaged with a main gear, and a rotating rod is coaxially and fixedly connected to the main gear; the two ends of the rotating rod are rotationally connected with the two side walls of the transmission cavity correspondingly, and a control assembly is arranged on the rotating rod. The core body temperature of a patient is monitored in real time through the bimetallic strip, the heating power of the host is synchronously adjusted, the temperature of the heating blanket is adjusted in real time according to the body temperature of the patient, and the body temperature of the patient in a general anesthesia operation is stable.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to a warming device and system for use in general anesthesia. Background Technology

[0002] During surgery, the effects of anesthetic drugs can suppress the patient's thermoregulatory center. At the same time, factors such as exposure of the surgical area, large-volume intravenous fluid and blood transfusions (the fluid temperature is usually lower than body temperature), and low operating room temperature can easily lead to hypothermia in patients. Hypothermia may trigger a series of complications, such as coagulation disorders, decreased immunity, delayed wound healing, and increased cardiovascular burden.

[0003] Medical heating blankets are now commonly used during surgery to maintain a stable patient body temperature. For example, the 3M Bair Hugger medical heating blanket consists of a heating unit and a heating blanket. The heating unit is connected to a heating tube, and the other end of the heating tube is connected to the heating blanket. The heating unit outputs the corresponding temperature to the heating blanket through the heating tube. Through the gentle and uniform heating method of the heating blanket, it helps patients maintain a stable core body temperature during surgery, thereby reducing the risk of the above-mentioned complications and ensuring surgical safety and postoperative recovery.

[0004] In actual use, although the 3M Bair Hugger medical heating blanket can maintain the patient's body temperature by outputting temperature through the heating unit and conducting it to the heating blanket through the heating tube, the temperature regulation of the heating blanket mainly relies on preset level control and lacks a real-time temperature regulation mechanism based on temperature changes. When the ambient temperature fluctuates during the operation, the patient's body temperature is abnormal, or the internal components of the device experience slight parameter drift due to long-term operation, the simple preset level control may have problems with response delay or insufficient adjustment accuracy, which may lead to fluctuations in the patient's body temperature or safety hazards, affecting the stable control of the patient's body temperature during general anesthesia.

[0005] Therefore, the present invention proposes a heat preservation device and system for general anesthesia to solve the above problems. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a warming device and system for general anesthesia. By using a bimetallic strip to monitor the patient's core body temperature in real time and simultaneously adjusting the heating power of the main unit, the temperature of the heating blanket can be adjusted in real time according to the patient's body temperature, ensuring the stability of the patient's body temperature during general anesthesia.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: A heat preservation device for general anesthesia includes a main unit and a heating blanket connected through a heating pipe. A support column is provided at the bottom of the main unit, and a controller is provided on the main unit. A sliding rheostat is electrically connected between the main unit and a power source. A transmission cavity surrounding the sliding rheostat is provided on the sliding rheostat. A buckle is fixedly connected to the bottom of the transmission cavity. A symmetrically arranged support column is fixedly connected to one side of the buckle along its length direction. A bimetallic strip is provided on the side of the buckle near the support column. The two sides of the bimetallic strip along its length direction are respectively fixedly connected to the side walls of the corresponding support columns. A push rod is fixedly connected to the top of the bimetallic strip. A rack is fixedly connected to the push rod near the sliding rheostat. The rack meshes with a main gear. A rotating rod is coaxially fixedly connected to the main gear. The two ends of the rotating rod are respectively rotatably connected to the two side walls of the transmission cavity. A control component is provided on the rotating rod for controlling the movement of the slider on the sliding rheostat to adjust the power of the main unit.

[0008] The technical principle of the above solution is as follows: The buckle is installed on the patient's urinary catheter or trachea. Utilizing the difference in thermal expansion coefficients between the upper and lower layers of the bimetallic strip, the patient's core body temperature is directly sensed through the trachea or urinary catheter. When the patient's body temperature is lower than the preset value, the bimetallic strip is in a flat state, not affecting the operating power of the main unit. When the patient's body temperature is too high, the bimetallic strip bends upward, causing the push rod to move upward. A rack is fixed on one side of the push rod, and the rack moves up and down synchronously when the push rod moves, driving the meshing main gear to rotate. The main gear is coaxially fixed with the rotating rod, and both ends of the rotating rod are connected to the side wall of the transmission cavity, rotating synchronously with the main gear. This, in turn, drives the control component on the rotating rod to move. Through the control component, the sliding rheostat slider moves, changing the resistance value between the main unit and the power supply. The change in resistance causes a change in the input current of the main unit, thereby realizing the adjustment of the heating power of the main unit.

[0009] The above-mentioned solution has the following advantages: Compared with the existing technology, this solution directly links the patient's body temperature through the bimetallic strip, forming a closed-loop feedback of "body temperature-deformation-power-temperature", avoiding the problem of "disconnection between heating tube temperature and the patient's actual body temperature" in traditional preset level control. For example, the 3M Bair Hugger requires manual adjustment of the level, which may lead to overcooling or overheating due to fluctuations in ambient temperature. At the same time, this solution uses the physical deformation of the bimetallic strip to directly trigger temperature regulation, avoiding the signal transmission delay of pure electronic temperature control.

[0010] Furthermore, the bimetallic sheet consists of a brass layer and an Invar alloy layer from top to bottom.

[0011] Beneficial effects: When the temperature changes, the brass layer and the Invar alloy layer expand / contract differently, driving the bimetallic strip to bend, and then transmitting power through the push rod, rack and pinion, and main gear. The significant difference in the expansion coefficients of brass and Invar alloy ensures that a body temperature change of 0.5℃ can trigger effective deformation, improving temperature sensing sensitivity; at the same time, the excellent low-temperature stability of Invar alloy avoids metal fatigue caused by prolonged use during surgery.

[0012] Furthermore, the control component includes a first gear, which is coaxially and fixedly connected to a rotating rod. The first gear meshes with a toothed chain. A fixed rod is rotatably connected to the side of the transmission cavity away from the first gear. A second gear corresponding to the first gear is coaxially and fixedly connected to the fixed rod. The second gear meshes with the toothed chain. The toothed chain is fixedly connected to the slide plate through a connecting rod.

[0013] Beneficial effects: When the rotating rod rotates, the first gear, which is fixed on the same axis, rotates synchronously, driving the meshing gear chain to circulate. The other end of the gear chain meshes with the second gear (fixed on the fixed rod on the side wall of the transmission cavity) to form a closed transmission chain, ensuring that the gear chain moves smoothly. The gear chain is fixed to the slider of the sliding rheostat through the connecting rod. The linear motion of the gear chain directly pushes the slider to slide along the resistance wire, changing the resistance length of the circuit.

[0014] Furthermore, a pressure sensor corresponding to the push rod is embedded in the top wall of the transmission cavity, and the pressure sensor is connected to the controller signal.

[0015] Beneficial effects: A pressure sensor corresponding to the push rod is installed on the top wall of the transmission cavity. When the push rod moves to the extreme position (such as when the bimetallic strip is excessively bent due to excessive body temperature and the push rod touches the top), a pressure signal is triggered and transmitted to the controller. The controller can cut off the main power supply or trigger an alarm to alert medical staff to extreme changes in the patient's body temperature.

[0016] Furthermore, a temperature sensor is installed at the connection point between the main unit and the heating element, and the temperature sensor is electrically connected to the controller.

[0017] Beneficial effects: The temperature sensor transmits the heat medium temperature data from the host to the controller. If the temperature of the heat medium deviates from the patient's body temperature fed back by the bimetallic strip by more than a threshold (e.g., the patient's body temperature is normal but the heat medium temperature is too high), the controller can forcibly adjust the sliding rheostat through the control component to correct the power output; thus avoiding erroneous adjustments caused by blockage of the heating tube or abnormal heat medium flow, such as "the patient's body temperature is not up to standard but the heat medium temperature is too high".

[0018] Furthermore, an alarm and a buzzer are fixedly connected to the top of the main unit, and both the alarm and the buzzer are connected to the controller signal.

[0019] Beneficial effects: The excessive deformation of the bimetallic strip triggers the pressure sensor, and the controller receives the signal to drive the alarm to flash and the buzzer to sound; the heating tube temperature sensor detects overheating and triggers an alarm synchronously through the controller to prompt medical staff to intervene; the dual sound and light alarm can penetrate the noisy environment of the operating room to ensure that medical staff can detect abnormalities and reduce the risk of hypothermia or burns.

[0020] Furthermore, the meshing points of the rack and main gear, as well as the meshing points of the gear chain and the first and second gears, are all coated with polytetrafluoroethylene.

[0021] Beneficial effects: The low coefficient of friction and wear-resistant properties of polytetrafluoroethylene coating reduce mechanical transmission resistance.

[0022] Furthermore, several brakeable casters are fixedly connected to the bottom of the support base.

[0023] Beneficial effects: The device is fixed by friction between the brake pads and the wheels, which makes it easy to adjust the position of the main unit according to the patient's position during the operation (such as moving it from the left side to the right side of the operating table), thus improving the flexibility of operation.

[0024] Furthermore, a display is embedded in the top of the main unit, and the display is connected to the controller via signals.

[0025] Beneficial effects: Medical staff can intuitively monitor the dynamic relationship between "patient body temperature - heat medium temperature - power output", which facilitates manual intervention and decision-making.

[0026] Furthermore, a warming system for use during general anesthesia includes:

[0027] Temperature monitoring module: Used to collect the temperature data of the heat medium output by the heating tube in real time through a temperature sensor and transmit the data to the controller;

[0028] Power regulation module: Based on the temperature value fed back by the temperature monitoring module or the mechanical adjustment signal triggered by the bimetallic strip, the control component drives the sliding rheostat slider to move, and outputs the corresponding heating power regulation signal to the main unit.

[0029] Heating execution module: Used to control the host to heat the heat medium according to the adjustment signal output by the power adjustment module, and to deliver the heat medium to the heating blanket through the heating tube to conduct heat to the patient's body surface;

[0030] Alarm feedback module: Composed of an alarm and a buzzer, when the temperature monitoring module detects that the temperature exceeds the preset threshold, the controller triggers the alarm light to flash and the buzzer to sound an alarm, prompting medical staff to intervene;

[0031] Human-computer interaction module: used to display the current heating temperature, power status and alarm information in real time, and also supports medical staff to preset the target temperature range through the controller.

[0032] Beneficial effects: By integrating independent hardware functions such as mechanical adjustment, electronic monitoring, and safety alarms into a unified whole through modular design, the system avoids the problems of scattered functions and complex wiring inherent in traditional equipment. For example, the temperature monitoring module and power adjustment module achieve seamless communication through a controller, significantly reducing signal delay between devices compared to the traditional independent sensor and manual adjustment mode. Simultaneously, the human-machine interface module supports one-click preset of target temperature ranges, eliminating the need for frequent manual adjustments by medical staff and reducing the workload during surgery, making it particularly suitable for emergency surgical scenarios. Secondly, the system innovatively introduces a signal priority decision mechanism, defaulting to dual... The mechanical deformation signal of the metal sheet (directly related to the patient's body temperature) has a higher priority than the electronic signal of the temperature sensor (indirectly reflecting the temperature of the heating medium), effectively solving the problem of lag in regulation when the temperature of the heating medium is normal but the patient's body temperature is abnormal. For example, when a patient's body temperature drops suddenly due to blood transfusion, even if the temperature of the heating medium in the heating tube has not yet fallen below the threshold, the system will immediately increase the power, thus improving the response speed. In addition, through cross-verification by pressure and temperature sensors, the system can distinguish between mechanical and electronic faults and output different warning signals through the alarm module to help medical staff quickly locate the problem, realizing the functions of fault self-diagnosis and graded alarm.

[0033] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0034] Figure 1 This is an isometric view of the main unit of an embodiment of the thermal insulation device for general anesthesia of the present invention;

[0035] Figure 2 This is a side sectional view of the buckle of an embodiment of the heat preservation device for general anesthesia according to the present invention;

[0036] Figure 3 This is a lateral sectional view of the push rod of an embodiment of the thermal insulation device for general anesthesia according to the present invention;

[0037] Figure 4 This is a front sectional view of a bimetallic strip in an embodiment of the thermal insulation device for general anesthesia according to the present invention;

[0038] Figure 5 This is an operational diagram of an embodiment of the thermal insulation system of the present invention used in general anesthesia.

[0039] The reference numerals in the accompanying drawings of the instruction manual include: 1. Main unit; 2. Heating blanket; 3. Heating tube; 4. Sliding rheostat; 5. Transmission cavity; 6. Buckle; 7. Support column; 8. Bimetallic strip; 9. Push rod; 10. Main gear; 11. Rotating rod; 12. First gear; 13. Gear chain; 14. Fixed rod; 15. Second gear; 16. Pressure sensor; 17. Display; 18. Support base; 19. Detailed Implementation

[0040] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0041] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0042] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0043] The following detailed description illustrates the specific implementation method:

[0044] Example 1:

[0045] As attached Figure 1As shown: A warming device for general anesthesia includes a main unit 1 and a heating blanket 2 connected via a heating tube 3. The main unit 1 has a support base 18 at its bottom, and several brakeable casters are fixedly connected to the bottom of the support base 18. The main unit 1 has a controller, preferably an STMicroelectronics controller. The top of the main unit 1 has a display 17 embedded in it, which is connected to the controller. The display 17 is preferably an Innolux 7-inch TFT-LCD module. During general anesthesia, the patient's body temperature is easily affected by factors such as the inhibition of the thermoregulatory center by anesthetic drugs, exposure of the surgical area, large-volume infusion and blood transfusion (the fluid temperature is usually lower than body temperature), and low operating room temperature. This can easily lead to hypothermia in patients. Although existing warming blankets (such as the 3M Bair Hugger medical warming blanket) can output temperature to the warming blanket through a heat source to maintain the patient's body temperature, the temperature regulation of the warming blanket relies on preset temperature control and lacks a real-time temperature regulation mechanism. The insufficient regulation accuracy leads to a deviation between the heating temperature and the patient's body temperature requirements, affecting the stability of the patient's body temperature during general anesthesia.

[0046] To ensure the stability of the patient's body temperature during surgery, combined with the accompanying... Figure 1 Appendix Figure 2 Appendix Figure 3 and attached Figure 4 As shown, a sliding rheostat 4 is electrically connected between the host 1 and the power supply. The input terminal of the sliding rheostat 4 is electrically connected to the power supply, and the output terminal of the sliding rheostat 4 is electrically connected to the host 1. A transmission cavity 5 surrounds the sliding rheostat 4. A buckle 6 is welded to the bottom of the transmission cavity 5. A symmetrically arranged support column 7 is welded to one side of the buckle 6 along its length. A bimetallic strip 8 is provided on the side of the buckle 6 near the support column 7. The bimetallic strip 8 consists of a brass layer and an Invar alloy layer from bottom to top. The two sides of the bimetallic strip 8 are welded to the side walls of the corresponding support column 7 on both sides along its length. A push rod 9 is welded to the top of the bimetallic strip 8. A rack is welded to the side of the push rod 9 near the sliding rheostat 4. Figure 3 As shown, a rack meshes with a main gear 10, and a rotating rod 11 is coaxially welded to the main gear 10. Both ends of the rotating rod 11 are rotatably connected to the two side walls of the transmission cavity 5, respectively. The rotating rod 11 is equipped with a control component for controlling the movement of the slider 19 on the sliding rheostat 4 to adjust the power of the main unit 1; as shown in the attached diagram. Figure 2As shown, the control assembly includes a first gear 12, which is coaxially welded to a rotating rod 11. The first gear 12 meshes with a toothed chain 13. A fixed rod 14 is rotatably connected to the transmission cavity 5 on the side away from the first gear 12. A second gear 15 corresponding to the first gear 12 is coaxially welded to the fixed rod 14. The second gear 15 meshes with the toothed chain 13. The toothed chain 13 is welded to the slide plate 19 via a connecting rod. A polytetrafluoroethylene coating is provided at the meshing points of the rack and the main gear 10, as well as at the meshing points of the toothed chain 13 with the first gear 12 and the second gear 15. The low coefficient of friction and wear resistance of the polytetrafluoroethylene coating reduce mechanical transmission resistance.

[0047] The specific implementation process is as follows: First, the main unit 1 is pushed to the appropriate area according to the position of the operating table, and then the brake is locked to ensure stable placement of the device; before the operation begins, medical staff preset the target body temperature range through the display 17 embedded in the top of the main unit 1. The display 17 is connected to the controller signal and can provide real-time feedback on subsequent operating parameters; then, the buckle 6 is installed on the patient's urinary catheter or trachea. The design of the buckle 6 and the support column 7 ensures that the bimetallic strip 8 can be firmly fixed to the surface of the tube, ensuring that the bimetallic strip 8 can only move along the attached... Figure 4 Deformation occurs in the vertical direction shown;

[0048] During the procedure, the patient's body temperature is transferred to the bimetallic strip 8 via a urinary catheter or trachea. When the body temperature is below a preset value, the bimetallic strip 8 remains flat, and the main unit 1 supplies heat to the heating blanket 2 through the heating tube 3 to maintain basic heating power. When the patient's body temperature rises, the coefficient of thermal expansion of brass is much greater than that of Invar alloy, resulting in a significant difference in the expansion / contraction of the upper and lower metal layers. For example, when the body temperature rises by 0.5°C, the coefficient of thermal expansion of the brass layer is [missing value]. The coefficient of thermal expansion of the Invar alloy layer is Brass has a significantly higher thermal expansion capacity than Invar alloy. The brass layer expands more than the Invar alloy layer. Since the bimetallic strip 8 is fixed on both sides along its length, the two metal layers cannot extend independently. The brass layer extends more than the Invar alloy layer. Due to the constraint of the Invar alloy layer on the brass layer, the brass layer is forced to bend upwards. Therefore, the brass layer causes the Invar alloy layer to bend upwards synchronously, causing the bimetallic strip 8 to bend upwards and move the top-fixed push rod 9 upwards accordingly. The rack on one side of the push rod 9 rises synchronously. Because the rack meshes with the main gear 10, the rack… The linear motion drives the main gear 10 to rotate. The main gear 10 is coaxially fixed with the rotating rod 11, which in turn drives the rotating rod 11 to rotate between the two side walls of the transmission cavity 5. The first gear 12, which is coaxially fixed on the rotating rod 11, rotates synchronously with the rotating rod 11. The first gear 12 meshes with the second gear 15 on the fixed rod 14 through the tooth chain 13 to form a closed transmission chain. Therefore, when the first gear 12 rotates, the tooth chain 13 makes a cyclic linear motion. The tooth chain 13 drives the slider 19 to slide along the resistance wire, changing the resistance value between the host 1 and the power supply.

[0049] When the slider 19 moves, the input current of the host 1 changes with the resistance. For example, if the patient's body temperature is too high, the movement of the slider 19 increases the resistance and decreases the current, reducing the heating power of the host 1 and lowering the temperature of the heat medium. This reduces the amount of heat conducted to the patient's body surface through the heating blanket 2, thus lowering the body temperature. Conversely, if the body temperature is too low, the bimetallic strip 8 bends downwards to reset, causing the push rod 9 to move downwards and drive the rack to rotate the main gear 10 in the opposite direction. This ultimately causes the slider 19 to move, reducing the resistance and increasing the power, thus raising the temperature of the heat medium and forming a closed-loop feedback of "body temperature-deformation-power-temperature". Compared with traditional preset level control (such as the 3M Bair Hugger which requires manual adjustment), this mechanical adjustment method avoids the problem of the temperature of the heating tube 3 being out of sync with the patient's actual body temperature. Furthermore, physical deformation directly triggers the adjustment without electronic signal transmission delay. At the same time, the optimized design of the material properties of the bimetallic strip 8 and the transmission structure ensures the sensitivity and stability of temperature adjustment, effectively maintaining the stability of the patient's body temperature during general anesthesia.

[0050] The warming device used in general anesthesia according to Example 1 was compared with the traditional 3M Bair Hugger medical warming blanket. The specific experiment is as follows:

[0051] Experimental Objective: To compare the performance of the warming device of Embodiment 1 of this invention for general anesthesia with that of the traditional 3M BairHugger medical warming blanket in maintaining stable patient body temperature during general anesthesia. The focus is on evaluating the differences between the two devices in terms of temperature regulation accuracy, safety, and ability to handle abnormal body temperatures, in order to verify the advantages of the device of this invention in achieving real-time body temperature feedback through bimetallic strip mechanical adjustment.

[0052] Experimental steps:

[0053] 1. Experimental Setup: Two experimental groups were selected. One group used the warming device described in Example 1 of this invention, and the other group used a traditional 3M Bair Hugger medical warming blanket. Human models were used to simulate patients undergoing general anesthesia, with the initial core body temperature set at 36.5°C. The operating room temperature was controlled at 22°C to simulate typical surgical conditions.

[0054] 2. Temperature disturbance simulation: During the experiment, common clinical temperature disturbances are simulated, such as low-temperature infusion (simulating 10°C fluid input) and ambient temperature fluctuations (from 22°C to 20°C), to test the device's response to changes in body temperature.

[0055] 3. Data monitoring: High-precision temperature sensors are used to continuously monitor the core body temperature of the patient model, the surface temperature of the heating blanket, and the temperature of the heat medium output by the device.

[0056] 4. Repetition of experiments: Each experimental group was run 10 times independently to ensure data reliability and statistical significance. Data was collected once per second, and the total experimental time was 60 minutes.

[0057] 5. Data Analysis: Calculate and compare indicators such as body temperature fluctuation range, average response time, and alarm accuracy.

[0058] Experimental data:

[0059] index Device of Embodiment 1 of the present invention Traditional 3M Bair Hugger Body temperature fluctuation range (°C) ±0.3 ±0.8 Alarm trigger accuracy (%) 90 80 Temperature control accuracy (°C) ±0.3 ±0.6 Success rate of handling extreme body temperature events (%) 90 70

[0060] Experimental conclusion:

[0061] Experimental results show that the warming device of Embodiment 1 of this invention is significantly superior to the traditional 3M Bair Hugger medical warming blanket in maintaining stable body temperature for patients undergoing general anesthesia. The device of this invention achieves higher temperature regulation accuracy through a bimetallic strip mechanical adjustment mechanism, reducing body temperature fluctuations. Simultaneously, its integrated alarm system is more reliable in detecting abnormal body temperatures and can more successfully handle extreme temperature events. Traditional devices, relying on preset control levels, have lower adjustment accuracy, and their alarm systems are prone to false alarms or missed alarms. Therefore, the device of this invention is more suitable for general anesthesia, effectively improving patient body temperature stability and reducing the risk of hypothermia or hyperthermia-related complications.

[0062] Example 2:

[0063] As attached Figure 1 As shown, the difference from Embodiment 1 is that the heating temperature is controlled by the physical deformation of the bimetallic strip 8. Since the wear and tear of the bimetallic strip 8 cannot be directly observed, in order to avoid adjustment errors caused by the wear and tear of the bimetallic strip 8, a pressure sensor 16 corresponding to the push rod 9 is embedded in the top wall of the transmission cavity 5. The preferred model of the pressure sensor 16 is TE Connectivity MS5837-30BA. The pressure sensor 16 is connected to the controller signal. A temperature sensor is provided at the connection between the main unit 1 and the heating tube 3. The preferred model of the temperature sensor is PT100 platinum resistance temperature sensor. The temperature sensor is electrically connected to the controller. An alarm and a buzzer are welded to the top of the main unit 1. The preferred models of the alarm and buzzer are Walfront DC12V LED audible and visual alarm and TDK PSB12P02BT, respectively. Both the alarm and the buzzer are connected to the controller signal.

[0064] The specific implementation process is as follows: When the patient's body temperature changes and the temperature is adjusted by the bimetallic strip 8, the temperature sensor collects the temperature of the heat medium at the outlet of the heating tube 3 in real time and transmits it to the controller, forming a cross-verification with the mechanical adjustment signal triggered by the bimetallic strip 8. For example, when the patient's core body temperature drops sharply due to blood transfusion (the bimetallic strip 8 triggers an increase in power), if the temperature sensor detects that the temperature of the heat medium does not rise as expected (such as the heating tube 3 being blocked), the controller immediately determines that the mechanical adjustment has failed and starts the backup adjustment mode.

[0065] Simultaneously, when the patient's body temperature rises abnormally to a dangerous threshold (e.g., exceeding 38.5℃), the bimetallic strip 8 bends excessively, causing the push rod 9 to touch the top, triggering the pressure sensor 16 to send an electrical signal to the controller. The controller simultaneously activates an alarm (e.g., a high-frequency flashing red LED) and a buzzer (e.g., a 1kHz intermittent alarm sound), penetrating the background noise of the operating room to alert medical staff to intervene. If no action is taken within 10 seconds, the controller further cuts off the power to the main unit 1 and displays the "Excessive Body Temperature - Emergency Shutdown" fault code on the display 17. This design not only compensates for the blind spot of the mechanical adjustment limit of the bimetallic strip 8 (e.g., excessive deformation caused by metal fatigue) through the pressure sensor 16, but also utilizes the linkage between the temperature sensor and mechanical adjustment to achieve fault self-diagnosis. For example, when the bimetallic strip 8 fails to trigger adjustment due to aging, the temperature sensor detects that the temperature of the heat medium continuously deviates from the set value (e.g., below 36℃ for a preset time range), and the controller also triggers an audible and visual alarm, avoiding the risk of "sensor failure equals loss of control" in traditional pure mechanical adjustment. Ultimately, through the collaboration of multiple components, the range of intraoperative body temperature fluctuations is reduced, compared to 3M Bair. Hugger's adjustment precision has been improved, while the response time for extreme temperature events has been shortened.

[0066] Example 3:

[0067] As attached Figure 5 As shown, a warming system for use during general anesthesia includes:

[0068] Temperature monitoring module: used to collect the heat medium temperature data output by heating tube 3 in real time through temperature sensor and transmit the data to controller;

[0069] Power regulation module: Based on the temperature value fed back by the temperature monitoring module or the mechanical adjustment signal triggered by the bimetallic strip 8, the control component drives the slider of the sliding rheostat 4 to move, and outputs the corresponding heating power regulation signal to the host 1.

[0070] Heating execution module: used to control the host 1 to heat the heat medium according to the adjustment signal output by the power adjustment module, and to deliver the heat medium to the heating blanket 2 through the heating tube 3 so as to conduct heat to the patient's body surface;

[0071] Alarm feedback module: Composed of an alarm and a buzzer, when the temperature monitoring module detects that the temperature exceeds the preset threshold, the controller triggers the alarm light to flash and the buzzer to sound an alarm, prompting medical staff to intervene;

[0072] Human-computer interaction module: used to display the current heating temperature, power status and alarm information in real time, and also supports medical staff to preset the target temperature range through the controller.

[0073] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A heat preservation device for general anesthesia, comprising a main unit (1) and a heating blanket (2) connected via a heating pipe (3), wherein a support column (7) is provided at the bottom of the main unit (1), and a controller is provided on the main unit (1), characterized in that: A sliding rheostat (4) is electrically connected between the host (1) and the power supply. A transmission cavity (5) surrounding the sliding rheostat (4) is provided on the sliding rheostat (4). A buckle (6) is fixedly connected to the bottom of the transmission cavity (5). A symmetrically arranged support column (7) is fixedly connected to one side of the buckle (6) along its length direction. A bimetallic strip (8) is provided on the side of the buckle (6) near the support column (7). The bimetallic strip (8) is fixedly connected to the side wall of the corresponding support column (7) on both sides along its length direction. A push rod (9) is fixedly connected to the top of the bimetallic strip (8). A rack is fixedly connected to the side of the push rod (9) near the sliding rheostat (4). The rack meshes with a main gear (10). A rotating rod (11) is fixedly connected to the main gear (10) on the same axis. The two ends of the rotating rod (11) are rotatably connected to the two side walls of the transmission cavity (5) respectively. A control component is provided on the rotating rod (11) for controlling the movement of the slider (19) on the sliding rheostat (4) to adjust the power of the host (1).

2. The heat preservation device for general anesthesia according to claim 1, characterized in that: The bimetallic sheet (8) consists of a brass layer and an Invar alloy layer from bottom to top.

3. The heat preservation device for general anesthesia according to claim 1, characterized in that: The control component includes a first gear (12), which is coaxially fixedly connected to a rotating rod (11). The first gear (12) meshes with a toothed chain (13). A fixed rod (14) is rotatably connected to the side of the transmission cavity (5) away from the first gear (12). A second gear (15) corresponding to the first gear (12) is coaxially fixedly connected to the fixed rod (14). The second gear (15) meshes with the toothed chain (13). The toothed chain (13) is fixedly connected to the slide plate (19) through a connecting rod.

4. The heat preservation device for general anesthesia according to claim 3, characterized in that: The transmission cavity (5) has a pressure sensor (16) embedded in its inner top wall, which corresponds to the push rod (9). The pressure sensor (16) is connected to the controller signal.

5. The heat preservation device for general anesthesia according to claim 1, characterized in that: A temperature sensor is provided at the connection between the main unit (1) and the heating tube (3), and the temperature sensor is electrically connected to the controller.

6. The heat preservation device for general anesthesia according to claim 1, characterized in that: The main unit (1) is fixedly connected to an alarm and a buzzer on the top, and both the alarm and the buzzer are connected to the controller signal.

7. The heat preservation device for general anesthesia according to claim 6, characterized in that: The rack and main gear (10) meshing point and the gear chain (13) meshing point with the first gear (12) and the second gear (15) are all coated with polytetrafluoroethylene.

8. The heat preservation device for general anesthesia according to claim 7, characterized in that: The bottom of the support base (18) is fixedly connected with several brakeable casters.

9. The heat preservation device for general anesthesia according to claim 8, characterized in that: The host (1) has a built-in display (17) on the top, and the display (17) is connected to the controller signal.

10. A thermal insulation system for general anesthesia, the system taking the controller of the thermal insulation device for general anesthesia as described in any one of claims 1-6 as the core hardware carrier, characterized in that, include: Temperature monitoring module: used to collect the heat medium temperature data output by the heating tube (3) in real time through the temperature sensor and transmit the data to the controller; Power adjustment module: Based on the temperature value fed back by the temperature monitoring module or the mechanical adjustment signal triggered by the bimetallic strip (8), the sliding rheostat (4) slide (19) is driven to move through the control component, and the corresponding heating power adjustment signal is output to the host (1); Heating execution module: used to control the host (1) to heat the heat medium according to the adjustment signal output by the power adjustment module, and to deliver the heat medium to the heating blanket (2) through the heating tube (3) to conduct heat to the patient's body surface; Alarm feedback module: Composed of an alarm and a buzzer, when the temperature monitoring module detects that the temperature exceeds the preset threshold, the controller triggers the alarm light to flash and the buzzer to sound an alarm, prompting medical staff to intervene; Human-computer interaction module: used to display the current heating temperature, power status and alarm information in real time, and also supports medical staff to preset the target temperature range through the controller.

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