An internal and external heating temperature measuring and control system for a pneumoperitoneum machine

Abstract

The utility model relates to a kind of inside and outside type heating temperature measuring and control system of pneumoperitoneum machine, including external gas source pressure detection module, external gas source temperature detection module, output gas pressure detection module, gas flow regulating valve, gas flow detection module, gas pressure relief valve, internal gas heating tank, internal gas temperature detection module and control system.External gas source is communicated with internal gas heating tank by pipeline, and external gas source pressure detection module and temperature detection module are set on the pipeline;The output interface of internal gas heating tank is connected with gas flow regulating valve by pipeline, and internal gas temperature detection module and gas flow detection module are set on the pipeline.The system realizes the accurate control of pneumoperitoneum gas temperature by inside and outside double heating and multiple point temperature detection, effectively solves the technical problem that patient temperature drops due to inaccurate gas temperature control of traditional pneumoperitoneum machine, and improves the safety and comfort of laparoscopic surgery.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment, specifically to an internal and external heating and temperature control system for an insufflator. Background Technology

[0002] With the widespread use of laparoscopic surgery, the insufflator has become an indispensable piece of equipment, and its performance directly affects the safety and effectiveness of the procedure. The insufflator primarily creates an insufflation system by injecting gas (usually carbon dioxide) into the abdominal cavity, providing the operating space for laparoscopic surgery. During laparoscopic surgery, the insufflator needs to precisely control the gas pressure, flow rate, and temperature within the abdominal cavity to ensure the safety of the procedure.

[0003] Currently, common insufflators on the market mainly consist of a gas source system, a heating system, a pressure control system, and a temperature monitoring system. For example, CN114733017A discloses an insufflator that uses a pressure-reducing valve to reduce pressure and internal pressure and flow sensors to detect and feed back carbon dioxide pressure and flow to a microprocessor. The microprocessor controls the opening and closing of a proportional valve to control the pressure and flow of carbon dioxide entering the patient's abdominal cavity, achieving precise preset pressure and flow values. CN104800901A discloses an insufflator tube device capable of real-time temperature display and adjustment, including a gas heating device and a gas detection, display, and control device connected to the gas heating device, enabling real-time monitoring, display, and adjustment of the temperature of the gas input into the abdominal cavity.

[0004] Regarding temperature control in insufflators, CN117257367A proposes an insufflator with dual temperature sensors. Two temperature sensors are symmetrically integrated at the air outlet of the ventilation assembly. These sensors are connected to a microcontroller, which in turn is connected to the heating assembly via a MOSFET, thus improving temperature control accuracy. CN114795321A discloses an insufflator with constant temperature and humidity functions. By adding an ultrasonic humidification module and a heating module to the machine body, the dry, cold carbon dioxide gas output by the insufflator is transformed into warm, humid carbon dioxide gas, effectively maintaining the temperature and humidity balance within the cavity.

[0005] In addition, CN116077153A discloses a 50L pneumoperitoneum machine pneumoperitoneum system, including a main control board, a human-machine interaction module, a heating control module, and a proportional valve group, etc. The output end of the heating control module is connected to a heating chamber through a signal line, which can heat the compressed gas and prevent the low-temperature compressed gas from directly entering the human abdominal cavity.

[0006] However, existing insufflation machines still have the following problems in terms of heating and temperature control systems:

[0007] 1. Low heating efficiency: Most existing insufflators use a single heating path, such as using only an external heating plate to heat the surface of the gas passage or relying solely on internal heating wires to directly contact the gas. External heating methods suffer from low heat conduction efficiency, with energy loss exceeding 30%, resulting in a long time required for the gas to reach the target temperature (37°C); while purely internal heating methods are prone to causing localized overheating, posing a risk of burning patient tissues.

[0008] 2. Insufficient temperature control accuracy: Most pneumoperitoneum machines only have a single temperature sensor at the output port to monitor the gas temperature. The sensor is outdated and cannot respond in real time to temperature fluctuations caused by sudden changes in gas flow, resulting in unstable gas temperature delivered into the abdominal cavity and affecting surgical safety.

[0009] 3. Insufficient safety redundancy mechanisms: Existing pneumoperitoneum machines rely heavily on hardware fuses for overheat protection, which have a long response time and cannot interrupt heating in milliseconds, posing a risk of thermal runaway and potentially harming patients.

[0010] 4. Lack of integrated monitoring and control system: Existing pneumoperitoneum machines often lack a system that integrates and controls the status of the external gas source, the internal heating status, and the output gas parameters, making it impossible to achieve precise control of the gas from input to output throughout the entire process.

[0011] Therefore, there is an urgent need to develop an internal and external heating and temperature control system for insufflators that can solve the above problems simultaneously, so as to improve the heating efficiency, temperature control accuracy and safety of insufflators, and provide a safer and more stable insufflator environment for laparoscopic surgery. Summary of the Invention

[0012] To address the technical problems of low heating efficiency, insufficient temperature control accuracy, and inadequate safety redundancy in single-path heating, and to achieve the technical effects of dual heating control, multiple temperature detection, safety protection, and data visualization, this invention provides an internal and external heating and temperature control system for an insufflator.

[0013] The purpose of this utility model is achieved through the following technical solution: an internal and external heating and temperature control system for an insufflator, comprising an external gas source pressure detection module, an external gas source temperature detection module, an output gas pressure detection module, a gas flow regulating valve, a gas flow detection module, a gas pressure relief valve, an internal gas heating tank, an internal gas temperature detection module, and a control system;

[0014] The external gas source pressure detection module, external gas source temperature detection module, output gas pressure detection module, gas flow regulating valve, gas flow detection module, gas pressure relief valve, internal gas heating tank, and internal gas temperature detection module are all connected to the control system. The heating and temperature control system is also equipped with a touch display module for displaying various parameters.

[0015] The internal gas heating tank is provided with an input interface, and external gas is connected to the input interface of the internal gas heating tank through a pipeline. The external gas source pressure detection module and the external gas source temperature detection module are arranged on the pipeline of external gas input to the internal gas heating tank along the airflow direction. The internal gas heating tank is provided with an output interface, and the output interface of the internal gas heating tank is connected to the input end of the gas flow regulating valve through a pipeline. The internal gas temperature detection module and the gas flow detection module are arranged on the pipeline between the internal gas heating tank and the gas flow regulating valve along the airflow direction.

[0016] Preferably, the external gas source pressure detection module is used to detect the pressure of the external gas source in real time, collect gas pressure data through the control system, and display the external gas source pressure data through the touch display module, and issue an alarm when the pressure is lower than the set value; the external gas source temperature detection module is used to detect the inlet temperature of the external gas source in real time, collect external gas source temperature data through the control system, and display the external gas source temperature data through the touch display module; the output gas pressure detection module is used to detect the output gas pressure in real time, collect output gas pressure data through the control system, display the output gas pressure data through the touch display module, set the output gas pressure value through the touch screen, and adjust the gas flow regulating valve in real time through the algorithm built into the control system to control the output gas pressure in real time; the gas flow regulating valve is used to regulate the gas flow, monitor and provide feedback on the flow data through the control system, and control the gas flow regulating valve through the algorithm built into the control system to precisely control the output gas pressure; the gas flow detection module is used to detect the gas flow rate, collect gas flow data through the control system, and display the gas flow data through the touch display module; the gas pressure relief valve is used to relieve gas pressure, and when the output gas pressure exceeds the real-time detected pressure data... When the pressure exceeds the set value, the control system controls the gas relief valve to release the pressure in the pipeline. The internal gas heating tank is used for gas heating, preheating the gas from the external gas source. By real-time detection of the external gas source temperature, the control system uses an algorithm to calculate and set the heating power based on data such as flow rate and temperature deviation, ensuring that the gas temperature after passing through the internal gas heating tank deviates from the set gas temperature by less than 2°C, thus preheating the gas. The internal gas temperature detection module is used to monitor the gas temperature after passing through the internal gas heating tank in real time, and uses an algorithm within the control system to calculate the deviation between the current flow rate and the output temperature. The heating power of the pneumoperitoneum catheter is calculated and set using data to precisely control the output gas temperature within ±0.3℃. The touch display module displays the set output gas temperature, and the output gas pressure setting data can be modified by touch. The output gas flow setting data can also be modified by touch. The module receives real-time feedback of output gas temperature, gas pressure, and flow data, and displays a time-output gas temperature-output gas pressure-output gas flow graph.

[0017] Furthermore, the heating and temperature control system is also equipped with a pneumoperitoneum catheter, which has an input interface. The input interface of the pneumoperitoneum catheter is connected to the output end of the gas flow regulating valve through a pipe. The gas pressure relief valve is installed on the pipe between the gas flow regulating valve and the pneumoperitoneum catheter. The output gas pressure detection module is installed on the pneumoperitoneum catheter to detect the output gas pressure. The pneumoperitoneum catheter is inserted into the abdominal cavity of the human body.

[0018] Furthermore, the wall of the pneumoperitoneum catheter is provided with a jacket, and multiple heating wires and temperature-sensing thermocouple wires are provided inside the jacket.

[0019] Furthermore, the pneumoperitoneum catheter includes an input interface, a silicone plug, a silicone tube, and an air outlet plug connected in sequence. The side wall of the silicone plug is also provided with a silicone cable, and the end of the cable is connected to a heating and temperature control connector. The access end of the heating guide wire and the temperature-sensing thermocouple wire extends into the silicone tube and is connected to the heating and temperature control connector.

[0020] Furthermore, the control system is connected to the external gas source pressure detection module, the external gas source temperature detection module, the output gas pressure detection module, the gas flow regulating valve, the gas flow detection module, the gas pressure relief valve, the internal gas heating tank, and the internal gas temperature detection module via serial communication.

[0021] Furthermore, the heating and temperature control system is also equipped with a touch display module that displays various parameters.

[0022] The beneficial effects of this utility model are as follows:

[0023] 1. Dual heating control via internal gas heating tank and pneumatic duct preheats the gas to within 2°C below the target temperature. Through the algorithm built into the control system, the output gas temperature can be stably controlled within ±0.3°C, shortening the response time to <5 seconds. Compared with the single-path heating method in the existing technology, which requires a response time of more than 15 seconds, the heating efficiency is greatly improved.

[0024] 2. This invention features multiple gas temperature detection capabilities, enabling more precise control of gas heating energy and achieving an end-to-end accuracy of ±0.8℃. The gas-filled tube can uniformly heat the gas, and the output gas temperature control is closer to that of the human body. This solves the problem in the prior art where a single temperature sensor is used to monitor the output gas temperature, resulting in sensor lag and inability to respond in real time to sudden changes in gas flow.

[0025] 3. This invention eliminates the risk of thermal runaway by combining hardware fuses with multi-level software shutdown (response time < 100ms). Compared with existing technologies where over-temperature protection relies solely on hardware fuses and has a response time > 2 seconds, this invention greatly improves system safety.

[0026] 4. This invention uses a touch display to receive real-time feedback of output gas temperature data, real-time gas pressure data, and flow rate data, and displays the data as a time-output gas temperature-output gas pressure-output gas flow rate graph, which facilitates medical staff to view historical data and conduct treatment assessments, thereby improving the operability and clinical application value of the system. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the internal and external heating and temperature control system for the pneumoperitoneum machine of this utility model;

[0028] Figure 2 This is a schematic diagram of the pneumoperitoneum catheter of this utility model.

[0029] The attached diagram is labeled as follows: 1-External gas source pressure detection module, 2-External gas source temperature detection module, 3-Output gas pressure detection module, 4-Gas flow regulating valve, 5-Gas flow detection module, 6-Gas pressure relief valve, 7-Internal gas heating tank, 8-Internal gas temperature detection module, 9-Pneumoperitoneum catheter, 91-Input interface, 92-Silicone plug, 93-Silicone tube, 94-Output plug, 95-Silicone cable, 96-Heating and temperature measurement control connector, 10-Control system, 11-Touch display module, 12-External gas, 13-Human abdominal cavity. Detailed Implementation

[0030] To facilitate understanding by those skilled in the art, the following description is provided in conjunction with embodiments and appendices. Figure 1-2 The present invention will be further described below. The content mentioned in the embodiments is not intended to limit the present invention.

[0031] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it can be directly on the other component or indirectly on that other component.

[0032] When a component is said to be "connected to" another component, it can be directly connected to the other component or indirectly connected to that other component.

[0033] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and 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 this application.

[0034] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature.

[0035] In the description of this application, "multiple" means two or more, unless otherwise expressly and specifically defined.

[0036] See Figure 1-2 An internal and external heating and temperature control system for an insufflator includes an external gas source pressure detection module 1, an external gas source temperature detection module 2, an output gas pressure detection module 3, a gas flow regulating valve 4, a gas flow detection module 5, a gas pressure relief valve 6, an internal gas heating tank 7, an internal gas temperature detection module 8, and a control system 10.

[0037] External gas source pressure detection module 1, external gas source temperature detection module 2, output gas pressure detection module 3, gas flow regulating valve 4, gas flow detection module 5, gas pressure relief valve 6, internal gas heating tank 7, and internal gas temperature detection module 8 are all connected to the control system 10 via signals. The internal gas heating tank 7 has an input interface 91, and external gas 12 is connected to the input interface 91 of the internal gas heating tank 7 via a pipeline. External gas source pressure detection module 1 and external gas source temperature detection module 2 are positioned along the airflow direction on the pipeline through which external gas 12 enters the internal gas heating tank 7. The internal gas heating tank 7 has an output interface, and the output interface of the internal gas heating tank 7 is connected to the input end of the gas flow regulating valve 4 via a pipeline. Internal gas temperature detection module 8 and gas flow detection module 5 are positioned along the airflow direction on the pipeline between the internal gas heating tank 7 and the gas flow regulating valve 4.

[0038] The heating and temperature control system also includes a pneumoperitoneum catheter 9, which has an input interface 91. The input interface 91 of the pneumoperitoneum catheter 9 is connected to the output end of the gas flow regulating valve 4 via a pipe. A gas pressure relief valve 6 is installed on the pipe between the gas flow regulating valve 4 and the pneumoperitoneum catheter 9. An output pressure detection module 3 is installed on the pneumoperitoneum catheter 9 to detect the output pressure. The pneumoperitoneum catheter 9 is inserted into the abdominal cavity 13 of the human body.

[0039] The pneumoperitoneum catheter 9 has a jacketed wall containing multiple heating guide wires (not shown) and temperature-sensing thermocouples (not shown). These heating guide wires can reheat the gas to ensure that the gas maintains a suitable temperature when it enters the abdominal cavity 13, while the temperature-sensing thermocouples monitor the gas temperature in real time and provide temperature feedback data to the control system 10.

[0040] The pneumoperitoneum catheter 9 includes an input port 91, a silicone plug 92, a silicone tube 93, and an outlet plug 94 connected in sequence. The side wall of the silicone plug 92 is also equipped with a silicone cable 95, the end of which is connected to a heating and temperature control connector 96. The access ends of the heating guide wire and the temperature-sensing thermocouple wire extend into the silicone tube 93 and connect to the heating and temperature control connector 96. This structural design allows the pneumoperitoneum catheter 9 not only to deliver gas but also to heat and monitor the temperature of the gas, ensuring that the gas temperature delivered into the abdominal cavity 13 is appropriate.

[0041] The control system 10 is connected via serial communication to the external gas source pressure detection module 1, the external gas source temperature detection module 2, the output gas pressure detection module 3, the gas flow regulating valve 4, the gas flow detection module 5, the gas pressure relief valve 6, the internal gas heating tank 7, and the internal gas temperature detection module 8. Through serial communication, the control system 10 can receive data from each module in real time and perform intelligent control based on this information, ensuring the stable operation of the entire system.

[0042] The heating and temperature control system is also equipped with a touch display module 11 for displaying various parameters. The touch display module 11 can display key parameters such as external gas source pressure, external gas source temperature, output gas pressure, gas flow rate, and internal gas temperature in real time, which facilitates medical staff to monitor the system's operating status and adjust relevant parameters in a timely manner.

[0043] During system operation, an external gas source enters the system through a pipeline. The external gas source pressure detection module 1 and external gas source temperature detection module 2 detect the pressure and temperature of the gas source, respectively, and transmit the data to the control system 10. After entering the internal gas heating tank 7, the gas is heated to a suitable temperature, and the internal gas temperature detection module 8 detects the temperature of the heated gas. The gas flow regulating valve 4 adjusts the gas flow according to the instructions of the control system 10, and the gas flow detection module 5 detects the actual flow and feeds it back to the control system 10. The gas enters the abdominal cavity 13 through the pneumoperitoneum catheter 9, and the output gas pressure detection module 3 monitors the output gas pressure to ensure that the pressure within the abdominal cavity is maintained within a safe range. When the pressure within the abdominal cavity is too high, the gas pressure relief valve 6 automatically opens to release excess gas, ensuring surgical safety. The heating guide wire inside the pneumoperitoneum catheter 9 provides secondary heating to the gas, and the temperature-sensing thermocouple wire monitors the gas temperature in real time to ensure that the gas temperature entering the abdominal cavity 13 is appropriate.

[0044] This insufflator features an internal and external heating and temperature control system. Through dual internal and external heating and multi-point temperature monitoring, it ensures the appropriate temperature of the gas introduced into the abdominal cavity, avoiding problems such as decreased patient body temperature and slow postoperative recovery caused by excessively low gas temperature in traditional insufflators. Simultaneously, comprehensive pressure monitoring and automatic pressure relief functions guarantee the safety of the surgical procedure.

[0045] The above description is merely a preferred embodiment of the present invention, and the present invention is not limited to the above embodiments. It is understood that other improvements and variations that are directly derived or conceived by those skilled in the art without departing from the spirit and concept of the present invention should be considered to be included within the protection scope of the present invention.

Claims

1. A heating and temperature control system for an insufflator, characterized in that: It includes an external gas source pressure detection module, an external gas source temperature detection module, an output gas pressure detection module, a gas flow regulating valve, a gas flow detection module, a gas pressure relief valve, an internal gas heating tank, an internal gas temperature detection module, and a control system; The external gas source pressure detection module, external gas source temperature detection module, output gas pressure detection module, gas flow regulating valve, gas flow detection module, gas pressure relief valve, internal gas heating tank, and internal gas temperature detection module are all connected to the control system signal. The internal gas heating tank is provided with an input interface, and external gas is connected to the input interface of the internal gas heating tank through a pipeline. The external gas source pressure detection module and the external gas source temperature detection module are sequentially arranged on the pipeline from which the external gas enters the internal gas heating tank along the airflow direction. The internal gas heating tank is provided with an output interface, and the output interface of the internal gas heating tank is connected to the input end of the gas flow regulating valve through a pipeline. The internal gas temperature detection module and the gas flow detection module are sequentially arranged on the pipeline between the internal gas heating tank and the gas flow regulating valve along the airflow direction.

2. The internal and external heating and temperature control system for an insufflator according to claim 1, characterized in that: The heating and temperature control system is also equipped with a pneumoperitoneum catheter. The pneumoperitoneum catheter has an input interface. The input interface of the pneumoperitoneum catheter is connected to the output end of the gas flow regulating valve through a pipe. The gas pressure relief valve is set on the pipe between the gas flow regulating valve and the pneumoperitoneum catheter. The output gas pressure detection module is set on the pneumoperitoneum catheter to detect the output gas pressure. The pneumoperitoneum catheter is inserted into the abdominal cavity of the human body.

3. The internal and external heating and temperature control system for an insufflator according to claim 2, characterized in that: The wall of the pneumoperitoneum catheter is provided with a jacket, and multiple heating wires and temperature-sensing thermocouple wires are provided inside the jacket.

4. The internal and external heating and temperature control system for an insufflator according to claim 3, characterized in that: The pneumoperitoneum catheter includes an input interface, a silicone plug, a silicone tube, and an air outlet plug connected in sequence. The side wall of the silicone plug is also provided with a silicone cable. The end of the silicone cable is connected to a heating and temperature control connector. The access end of the heating guide wire and the temperature-sensing thermocouple wire extends into the silicone tube and is connected to the heating and temperature control connector.

5. The internal and external heating and temperature control system for an insufflator according to claim 1, characterized in that: The control system is connected to the external gas source pressure detection module, external gas source temperature detection module, output gas pressure detection module, gas flow regulating valve, gas flow detection module, gas pressure relief valve, internal gas heating tank, and internal gas temperature detection module via serial communication.

6. The internal and external heating and temperature control system for an insufflator according to claim 1, characterized in that: The heating and temperature control system is also equipped with a touch display module that displays various parameters.

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