An automatic infusion heat preservation device for operating room nursing

Abstract

The application relates to the technical field of medical care, in particular to an infusion automatic heat preservation device for operating room nursing, which comprises a spiral covering type heating belt, a control module and a power supply unit. An electric heating wire is internally insulated and packaged in the spiral covering type heating belt, and a temperature sensor is arranged on the inner surface of the spiral covering type heating belt. The spiral covering type heating belt is in a strip structure, is used for being spirally wound on one end of an infusion tube close to a human body, and makes the inner surface tightly adhere to the outer wall of the infusion tube. The control module is arranged on the outer surface of the spiral covering type heating belt and is electrically connected with the electric heating wire and the temperature sensor, is used for controlling the heating state of the electric heating wire according to the feedback signal of the temperature sensor, and the power supply unit is used for supplying power for the control module and the electric heating wire. The application provides the infusion automatic heat preservation device which can realize accurate end heating, has high heat exchange efficiency, is compact in structure and safe and reliable.

Description

Technical Field

[0001] This invention relates to the field of medical and nursing technology, specifically to an automatic infusion warming device for operating room nursing. Background Technology

[0002] In the operating room environment, patients are prone to hypothermia due to the effects of anesthesia, open body cavities, and infusion of low-temperature fluids. Warming and keeping the infused fluids warm is an important measure to prevent intraoperative hypothermia.

[0003] Currently, commonly used intravenous infusion warming devices in clinical practice mainly fall into two categories. The first category is the constant temperature box preheating device, which preheats the infusion bag before infusion. Its drawback is that there is natural cooling after preheating and before infusion, and the entire tubing from the constant temperature box to the patient lacks insulation, resulting in significant heat loss. The second category is the tubing warmer, which uses heating blocks to heat the infusion tubing section passing through it.

[0004] Existing tubing warmers have the following shortcomings: First, the heating element and the infusion tubing are mostly in straight-line or point contact, resulting in limited heat exchange area and low heating efficiency; Second, the heating position is usually located in the middle of the infusion stand, far from the patient's puncture point. The heated medication loses heat significantly after flowing through the long, unheated tubing, causing the actual temperature of the medication entering the patient's body to be lower than the set value; Third, existing devices mostly use rigid shells, making them bulky and inconvenient for continuous use during patient transport.

[0005] Therefore, there is an urgent need for an automatic infusion heat preservation device that can achieve precise end-point heating, high heat exchange efficiency, compact structure, and safety and reliability. Summary of the Invention

[0006] The purpose of this invention is to provide an automatic infusion warming device for operating room nursing, so as to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: An automatic infusion warming device for operating room nursing includes a spiral-wrapped heating belt, a control module, and a power supply unit. The spiral-wrapped heating belt has an internally insulated heating wire and a temperature sensor on its inner surface. The spiral-wrapped heating belt has a strip structure and is used to spirally wrap around the end of the infusion tube closest to the human body, so that the inner surface is in close contact with the outer wall of the infusion tube. The control module is located on the outer surface of the spiral-wrapped heating belt and is electrically connected to the electric heating wire and the temperature sensor. It is used to control the heating state of the electric heating wire according to the feedback signal of the temperature sensor. The power supply unit provides power to the control module and the electric heating wire.

[0008] Furthermore, the inner surface of the spiral-wrapped heating belt is provided with anti-slip strips, which are used to increase the adhesion between the inner surface of the spiral-wrapped heating belt and the outer wall of the infusion tube.

[0009] Furthermore, the inner surface of the spiral-wrapped heating belt is also provided with a heat-conducting sheet, which is used to increase the heat conduction efficiency between the electric heating wire and the infusion tube.

[0010] Furthermore, the inner surface of the spiral-wrapped heating belt is provided with a shape memory alloy strip, which runs through the entire spiral-wrapped heating belt along its length.

[0011] Furthermore, the spiral-wrapped heating belt is provided with a heat insulation layer on its outer side, which covers the outer side of the electric heating wire.

[0012] Furthermore, the spiral-wrapped heating belt has an upper step on one side of the eaves and a lower step on the other side of the eaves; during the spiral wrapping of the infusion tube, the lower step overlaps the upper step to keep the surface of the spiral-wrapped heating belt flat after wrapping.

[0013] Furthermore, the temperature sensor is a flexible thin-film temperature sensor.

[0014] Furthermore, a bimetallic temperature control switch is connected in series in the electric heating wire, and the bimetallic temperature control switch is attached to the inner wall of the spiral-wrapped heating belt; when the temperature exceeds the preset safety threshold, the bimetallic temperature control switch physically disconnects the circuit due to thermal deformation.

[0015] Furthermore, the control module is also equipped with a display screen, a speaker, a power switch, an alarm light, a status light, and a power cord interface; the display screen is used to display temperature information, the speaker and alarm light are used to emit audible and visual alarm signals, and the status light is used to indicate whether the device is in standby or heating state.

[0016] Furthermore, the spiral-wrapped heating belt has a tightening strap at at least one end, and the tightening strap is Velcro.

[0017] Compared with the prior art, the beneficial effects of the present invention are: 1. This invention uses a spiral winding method to directly place the heating belt at the end of the infusion tube closest to the human body, shortening the delivery distance of the heated medicine and reducing heat loss during pipeline transmission. Simultaneously, the spiral structure increases the contact area between the heating belt and the infusion tube, as well as the length of the heat exchange path, improving heating uniformity and heat exchange efficiency.

[0018] 2. In this invention, the anti-slip strip improves the reliability of the device's fixation on the infusion tube; the heat-conducting sheet improves the heat transfer efficiency; and the heat insulation layer reduces the ineffective loss of heat, improves energy utilization efficiency, and at the same time lowers the temperature of the outer surface of the heating belt, avoiding accidental burns to the patient's skin or medical staff.

[0019] 3. In this invention, the shape memory alloy strip enables the heating band to automatically clamp onto the infusion tube without the need for an additional locking mechanism; the overlapping structure of the upper and lower steps ensures the flatness of the heating band surface after spiral wrapping, reducing the risk of the device snagging on other instruments or dressings in the operating room environment.

[0020] 4. The tightening band in this invention provides an additional mechanical fixing method, complementing the automatic clamping effect of the shape memory alloy strip. When the shape memory alloy strip has not yet reached its phase change temperature, such as when the device is first started or when the phase change clamping force is insufficient, the tightening band ensures the initial fixation of the heating band on the infusion tubing. The Velcro structure is easy to operate, reusable, and the tightening degree can be adjusted to adapt to infusion tubing of different diameters. Attached Figure Description

[0021] Figure 1 A schematic diagram of the spiral winding structure of an automatic infusion warming device for operating room nursing; Figure 2 A schematic diagram of the structure of an automatic infusion warming device for operating room nursing when laid flat and unfolded; Figure 3 This is a schematic diagram of the control module. Figure 4 A schematic diagram of the upper and lower steps of the spiral-wrapped heating belt, as well as the shape memory alloy strip, anti-slip strip, heat-conducting sheet, temperature sensor and bimetallic temperature control switch in the inner wall; Figure 5 This is a structural distribution diagram of the heat insulation layer, electric heating wire, shape memory alloy strip, anti-slip strip and heat-conducting sheet inside the cross section of the spiral-wrapped heating belt; Figure 6 This is a schematic diagram of the spiral-wrapped heating belt and infusion device in operation. Figure 7 A schematic diagram of an automatic infusion warming device for operating room nursing equipped with a tightening strap, with the strap spirally wound and the loose side of the strap facing forward. Figure 8 A schematic diagram of an automatic infusion warming device for operating room nursing equipped with a tension band, with the tension band needle facing forward; Figure 9 A schematic diagram of an automatic infusion warming device for operating room nursing equipped with a tension band, laid flat with the needle side of the tension band facing forward. Figure 10A schematic diagram of an automatic infusion warming device for operating room nursing equipped with a tension strap, laid flat with the loose side of the tension strap facing forward.

[0022] In the diagram: 1. Spiral-wrapped heating belt; 2. Control module; 3. Fastening belt; 101. Upper step; 102. Lower step; 103. Shape memory alloy strip; 104. Anti-slip strip; 105. Temperature sensor; 106. Bimetallic strip temperature control switch; 107. Thermal insulation layer; 108. Electric heating wire; 109. Heat-conducting sheet; 201. Display screen; 202. Speaker; 203. Power switch; 204. Alarm light; 205. Working status light; 206. Power cord interface. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. 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.

[0024] Example 1 This embodiment provides a basic implementation of an automatic infusion warming device for operating room nursing.

[0025] Please see Figure 1 , Figure 2 and Figure 6 An automatic infusion warming device for operating room nursing includes a spiral-wrapped heating belt 1, a control module 2, and a power supply unit (not shown in the figure).

[0026] The spiral-wrapped heating belt 1 has a strip structure, with an internally insulated heating wire 108 and a temperature sensor 105 on its inner surface. The spiral-wrapped heating belt 1 is used to spirally wrap around the end of the infusion tube closest to the human body, and to make the inner surface tightly adhere to the outer wall of the infusion tube.

[0027] The control module 2 is disposed on the outer surface of the spiral-wrapped heating belt 1 and is electrically connected to the electric heating wire 108 and the temperature sensor 105. The control module 2 is used to control the heating state of the electric heating wire 108 according to the feedback signal of the temperature sensor 105.

[0028] The power supply unit supplies power to the control module 2 and the electric heating wire 108. The power supply unit can be implemented using a built-in battery or an external power adapter.

[0029] Working principle: The spiral-wrapped heating belt 1 is spirally wound around the end of the infusion tube near the patient, ensuring close contact between the inner surface of the heating belt and the outer wall of the infusion tube. After the device is activated, the control module 2 receives the surface temperature signal of the tube collected by the temperature sensor 105 and compares it with the preset target temperature. When the actual temperature is lower than the target temperature, the control module 2 controls the electric heating wire 108 to be energized; when the actual temperature reaches or exceeds the target temperature, the control module 2 cuts off or reduces the power supply to the electric heating wire 108, thereby achieving automatic constant temperature maintenance of the medication in the infusion tube.

[0030] In this embodiment, the heating belt is directly placed at the end of the infusion tube closest to the body using a spiral winding method. This shortens the delivery distance of the heated medication and reduces heat loss during the tube's transmission. Simultaneously, the spiral structure increases the contact area between the heating belt and the infusion tube, as well as the length of the heat exchange path, improving heating uniformity and heat exchange efficiency.

[0031] Example 2 Based on Example 1, this embodiment further defines the anti-slip and heat-conducting structure of the inner surface of the spiral-wrapped heating belt 1.

[0032] Please see Figure 4 and Figure 5 The inner surface of the spiral-wrapped heating belt 1 is provided with an anti-slip strip 104, which is used to increase the adhesion between the inner surface of the spiral-wrapped heating belt 1 and the outer wall of the infusion tube.

[0033] The inner surface of the spiral-wrapped heating belt 1 is also provided with a heat-conducting sheet 109, which is used to increase the heat conduction efficiency between the electric heating wire 108 and the infusion tube.

[0034] The spiral-wrapped heating belt 1 has a heat insulation layer 107 on its outer side, which covers the outer side of the electric heating wire 108.

[0035] Working principle: The anti-slip strip 104 increases the coefficient of friction between the inner surface of the heating band and the outer wall of the infusion tube, preventing the heating band from sliding axially or loosening circumferentially on the infusion tube. The heat-conducting sheet 109 quickly and evenly conducts the heat generated by the electric heating wire 108 to the outer wall of the infusion tube, reducing heat accumulation inside the heating band. The thermal insulation layer 107 reflects or blocks the heat emitted by the electric heating wire 108 towards the outside of the heating band, directing the heat inward and reducing heat loss to the environment.

[0036] The anti-slip strip 104 improves the reliability of the device's fixation on the infusion tubing, preventing displacement of the heating band due to patient limb movement or tubing pulling. The heat-conducting sheet 109 improves heat conduction efficiency, allowing the heat generated by the electric heating wire 108 to be more effectively transferred to the medication in the infusion tubing. The thermal insulation layer 107 reduces ineffective heat loss, improves energy utilization efficiency, and lowers the temperature of the heating band's outer surface, preventing accidental burns to the patient's skin or healthcare workers.

[0037] Example 3 Based on Example 1, this embodiment further defines the shape retention and stacking flat structure of the spiral-wrapped heating belt 1.

[0038] Please see Figure 2 and Figure 4 The inner surface of the spiral-wrapped heating belt 1 is provided with a shape memory alloy strip 103, which runs through the entire spiral-wrapped heating belt 1 along its length.

[0039] The spiral-wrapped heating belt 1 has an upper step 102 on one side and a lower step 101 on the other side. During the spiral wrapping of the infusion tube, the lower step 101 overlaps the upper step 102 to keep the surface of the spiral-wrapped heating belt 1 flat after wrapping.

[0040] Working Principle: The shape memory alloy strip 103 is made of nickel-titanium shape memory alloy. At room temperature, the shape memory alloy strip 103 is in a malleable state, making it easy to unfold the heating band and wrap it around the infusion tube. When the device is powered on and heated to the working temperature (e.g., 36℃-40℃), the shape memory alloy strip 103 undergoes a martensitic-to-austenitic phase transformation, restoring the preset helical shape and generating a contraction and clamping force, making the inner surface of the heating band tightly adhere to the outer wall of the infusion tube. The upper step 102 and the lower step 101 form a superimposed fit during the helical winding process, and the joint between adjacent helical coils achieves a smooth transition through the step structure, avoiding the formation of protrusions or depressions.

[0041] The shape memory alloy strip 103 enables the heating band to automatically clamp onto the infusion tubing, eliminating the need for an additional locking mechanism and simplifying the operation. Simultaneously, the thermal conductivity of the shape memory alloy increases during the phase change process, facilitating heat transfer from the heating band to the infusion tubing. The overlapping structure of the upper step 102 and the lower step 101 ensures the flatness of the heating band surface after spiral wrapping, reducing the risk of the device snagging on other instruments or dressings in the operating room environment.

[0042] Example 4 This embodiment further defines the temperature detection and safety protection structure based on Embodiment 1.

[0043] Please see Figure 4The temperature sensor 105 is a flexible thin-film temperature sensor.

[0044] A bimetallic temperature control switch 106 is connected in series in the electric heating wire 108, and the bimetallic temperature control switch 106 is attached to the inner wall of the spiral-wrapped heating belt 1. When the temperature exceeds a preset safety threshold, the bimetallic temperature control switch 106 physically disconnects the circuit due to thermal deformation.

[0045] Working principle: Flexible thin-film temperature sensors are distributed along the inner surface of the spiral-wrapped heating belt 1, with their sensing surfaces directly contacting the outer wall of the infusion tube. They collect multi-point temperature data from the tube surface in real time and transmit it to the control module 2. A bimetallic temperature control switch 106 is connected in series with the electric heating wire 108, with its sensing surface in close contact with the inner wall of the heating belt. Within the normal operating temperature range, the bimetallic strip remains closed, and the circuit is conductive. When any cause leads to a temperature rise to a preset safety threshold (e.g., 40℃), the bimetallic strip bends due to the difference in thermal expansion coefficients between the two metal layers, physically breaking the circuit and cutting off the power supply to the electric heating wire 108.

[0046] The flexible thin-film temperature sensor has excellent bending adaptability and can be wound and deformed along with the heating belt without affecting the temperature measurement accuracy, realizing distributed temperature monitoring along the spiral path. The bimetallic temperature control switch 106, as a physical protection device independent of the electronic temperature control system, can still reliably cut off the heating circuit when the electronic temperature control fails, providing dual safety protection to prevent the medicine from deteriorating or the patient from being scalded due to overheating.

[0047] Example 5 Based on Embodiment 1, this embodiment further defines the human-computer interaction structure of the control module 2.

[0048] Please see Figure 3 The control module 2 is equipped with a display screen 201, a speaker 202, a power switch 203, an alarm light 204, a working status light 205, and a power cord interface 206.

[0049] The display screen 201 is used to display temperature information. The speaker 202 and the alarm light 204 are used to emit audible and visual alarm signals. The status light 205 is used to indicate whether the device is in standby or heating mode.

[0050] Working principle: After the operator starts the device via power switch 203, the status indicator 205 illuminates (a solid green light indicates standby, while a flashing green light indicates heating). The display screen 201 shows the current pipe temperature detected by the temperature sensor 105 and the set target temperature in real time. When the temperature exceeds the normal range (e.g., below 34℃ or above 38℃) or the sensor malfunctions, the control module 2 drives the speaker 202 to emit intermittent buzzing sounds, and simultaneously drives the alarm light 204 to emit a flashing red light. The audible and visual alarms automatically deactivate when the temperature returns to the normal range.

[0051] The display screen 201 provides intuitive temperature information, facilitating real-time monitoring of the heating status by medical staff. The audible and visual alarm device promptly alerts medical staff to any abnormal temperature readings, preventing adverse consequences due to negligence. The status indicator 205 uses simple colors and flashing patterns to indicate the device's basic operating status, allowing for quick and easy assessment from a distance.

[0052] Example 6 Based on Example 1, this embodiment further defines the auxiliary fixing structure of the tightening strap 3.

[0053] Please see Figure 7 , Figure 8 , Figure 9 and Figure 10 The spiral-wrapped heating belt 1 has a tightening band 3 at at least one end, and the tightening band 3 is a Velcro strap.

[0054] Working principle: After the spiral-wrapped heating belt 1 is wrapped around the infusion tube, the tightening strap 3 is wrapped around the main body of the heating belt. The hook and loop sides of the Velcro are used to adhere to each other, applying a circumferential tightening force to the spiral-wrapped heating belt 1 to prevent it from loosening on the infusion tube.

[0055] The tightening band 3 provides an additional mechanical fixation method, complementing the automatic clamping action of the shape memory alloy strip 103. When the shape memory alloy strip 103 has not yet reached its phase change temperature (e.g., when the device is first started) or the phase change clamping force is insufficient, the tightening band 3 ensures the initial fixation of the heating band on the infusion tubing. The Velcro structure is easy to operate, reusable, and the tightening degree is adjustable to accommodate infusion tubing of different diameters.

[0056] Example 7 This embodiment provides a complete method for using any of the devices described in Embodiments 1 to 6 in an operating room environment.

[0057] Usage steps:

[0058] The first step is to wrap the spiral-wrapped heating band 1 around the end of the infusion tube near the patient's puncture point in a spiral manner, ensuring that the inner surface is in contact with the outer wall of the infusion tube, and that the upper step 102 and the lower step 101 are overlapped and flat.

[0059] The second step is to wrap the tension strap 3 around the heating belt body and fix it in place.

[0060] The third step is to connect the power supply unit to the power source or insert the battery, and press the power switch 203 to start the device.

[0061] Fourth step: Set the target temperature (usually 36℃-37.5℃) through control module 2, observe display screen 201 to confirm that the temperature reading is normal, and the working status light 205 indicates that it is normal.

[0062] Fifth step: Start the infusion operation. The device automatically maintains the temperature of the medicine solution at the end of the infusion tube.

[0063] Step 6: If an audible and visual alarm occurs during the infusion process, medical staff should check whether the temperature sensor 105 has fallen off or whether the heating belt has shifted, and stop the infusion or adjust the device as needed.

[0064] Step 7: After the infusion is completed, turn off the power switch 203, release the tension band 3 (if applicable), remove the spiral-wrapped heating band 1 from the infusion tube, and clean and disinfect it for future use.

Claims

1. An automatic infusion warming device for operating room nursing, characterized in that, Includes a spiral-wrapped heating belt (1), a control module (2), and a power supply unit: The spiral-wrapped heating belt (1) has an internally insulated heating wire (108) and a temperature sensor (105) on its inner surface; the spiral-wrapped heating belt (1) is a strip structure used to spirally wrap around the end of the infusion tube closest to the human body and make the inner surface tightly adhere to the outer wall of the infusion tube. The control module (2) is located on the outer surface of the spiral-wrapped heating belt (1) and is electrically connected to the electric heating wire (108) and the temperature sensor (105) for controlling the heating state of the electric heating wire (108) according to the feedback signal of the temperature sensor (105). The power supply unit supplies power to the control module (2) and the electric heating wire (108).

2. The automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The inner surface of the spiral-wrapped heating belt (1) is provided with anti-slip strips (104), which are used to increase the adhesion between the inner surface of the spiral-wrapped heating belt (1) and the outer wall of the infusion tube.

3. The automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The inner surface of the spiral-wrapped heating belt (1) is also provided with a heat-conducting sheet (109), which is used to increase the heat conduction efficiency between the electric heating wire (108) and the infusion tube.

4. The automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The inner surface of the spiral-wrapped heating belt (1) is provided with a shape memory alloy strip (103), and the shape memory alloy strip (103) runs through the entire spiral-wrapped heating belt (1) along the length direction.

5. The automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The spiral-wrapped heating belt (1) has a heat insulation layer (107) on its outer side, which covers the outer side of the electric heating wire (108).

6. The automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The spiral-wrapped heating belt (1) has an upper step (102) on one side of the eaves and a lower step (101) on the other side of the eaves. During the spiral wrapping of the infusion tube, the lower step (101) is stacked on top of the upper step (102) so that the surface of the spiral-wrapped heating belt (1) after wrapping remains flat.

7. An automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The temperature sensor (105) is a flexible thin-film temperature sensor.

8. An automatic infusion warming device for operating room nursing according to claim 1, characterized in that: A bimetallic strip temperature control switch (106) is connected in series in the electric heating wire (108). The bimetallic strip temperature control switch (106) is attached to the inner wall of the spiral-wrapped heating belt (1). When the temperature exceeds the preset safety threshold, the bimetallic strip temperature control switch (106) physically disconnects the circuit due to thermal deformation.

9. An automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The control module (2) is also equipped with a display screen (201), a speaker (202), a power switch (203), an alarm light (204), a working status light (205), and a power cord interface (206); the display screen (201) is used to display temperature information, the speaker (202) and the alarm light (204) are used to emit sound and light alarm signals, and the working status light (205) is used to indicate whether the device is in standby or heating state.

10. An automatic infusion warming device for operating room nursing according to claim 1, characterized in that: The spiral-wrapped heating belt (1) has a tightening band (3) at at least one end, and the tightening band (3) is a Velcro.

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