CN100487753C - CO for simulating human body tepidity2Pneumoperitoneum experimental device - Google Patents

Abstract

The invention relates to an experimental device for simulating human body temperature _CO2 pneumoperitoneum, which belongs to the technical field of medical experimental devices. To obtain an experimental device that meets the needs of systematic and comprehensive warm CO ₂ pneumoperitoneum research. The characteristic of the present invention is that the gas-peritoneum box with a capacity comparable to the abdominal cavity of a human body is a hollow hexahedron made of heat-insulating resin material, and the outer side of the box wall is sealed and covered with aluminum foil from the inside to the outside, and an asbestos heating belt wrapped with a heating resistance wire , the outer layer is wrapped with an insulating cover made of soft heat-insulating foam; there are three pipes connected with the gas abdomen box, one upward pipe is the air intake pipe, which is connected with the outlet of the hot and humid CO ₂ generator, and the other two are respectively Up, and down, each with a control valve through the pipe. The hot and humid _CO2 generator consists of a _CO2 heater, atomizer and mixer. After _the present invention is implemented, a human body thermal CO _{pneumoperitoneum} simulation experiment device that can control the temperature, humidity, flow and pressure of CO is provided, which can simulate the pneumoperitoneum situation of the human body to the greatest extent in vitro, and can clearly define the temperature field distribution. On the basis of completing the systematic study of warm CO ₂ pneumoperitoneum.

Description

An experimental device for simulating human body temperature CO2 pneumoperitoneum

technical field

It belongs to medical experiment device technology, and is an experiment device involving simulating human body heat _CO2 pneumoperitoneum.

Background technique

Minimally invasive surgery is the development direction of modern surgery, and laparoscopy is its representative technology. As the basis of laparoscopic surgery, _CO2 pneumoperitoneum has always been the focus of laparoscopic technology research. Normal temperature CO ₂ (room temperature 25°C) is mainly used in conventional pneumoperitoneum, and its application safety has been systematically studied. However, there are many deficiencies in normal temperature CO ₂ gas, which can cause a drop in body core temperature and lead to a stress response, which affects the postoperative recovery of patients, and the problem becomes more prominent as laparoscopy is used in long-term operations such as malignant tumor operations. It can cause abdominal and shoulder postoperative pain, tachycardia and other postoperative discomfort. With the continuous improvement and perfection of laparoscopic technology, warm CO ₂ pneumoperitoneum (35-37 ℃) is increasingly used in clinical practice. Despite the clinical application, relevant systematic research on warm _CO2 is seriously insufficient. There are different clinical research reports, but basic research is quite lacking. The distribution of gas temperature in the abdominal cavity is unclear _. There are few studies on important issues such as whether warming _CO2 in laparoscopic malignant tumor surgery will increase tumor cell dissemination. In addition, whether higher temperature CO ₂ , that is, hot CO ₂ (41-43°C) can kill tumor cells and tissue, block tumor cell dissemination, and prevent peritoneal implantation and metastasis in laparoscopic malignant tumor surgery is worth exploring. In general, there is a lack of systematic and comprehensive research and discussion on warm _CO2 pneumoperitoneum, and the main reason for the lack of research is the lack of a good human body warm CO2 pneumoperitoneum simulation experimental device.

加湿器；②不具有内置加热功能的气腹机接加热加湿装置：如简易Stryker气腹机+Insufflow热湿管；③使用既能加热又能加湿的气腹机，如Smith&Nephew气腹机；简易气腹模拟设备则国外报道或模糊不清，或过于简单。这些实验装置归结起来存在如下问题：①加热最高只能达到41℃，无法达到热CO₂研究所需的41℃以上的温度；②温热CO₂气体在一定空间内的温度分布常常是不均的，不同的部位有着不同的温度，空间较大时，温度差可以很大。而目前的实验装置，不论那种加热加湿方式，其测量的温度湿度都是仪器的气体出口温度，且温度湿度探头为单探头，不能自由移动，不能置入气腹模拟设备中测量气腹中特定部位的实际温度，因而虽然有恒温调节装置和调节能力，但是由于探头固定而只能保证仪器气体出口的气体温度湿度，不能保证气腹内特定部位的温度和湿度；③气腹模拟设备不足：缺乏相应的匹配良好的气腹模拟设备，气腹模拟装置结构简单导致气腹模拟失真，如人体腹壁温度缺乏模拟、容积不符合人体实际气腹的容量等，压力流量等研究因素的控制不足，温热CO₂气体的温度分布不明等等。总起来说，目前的实验装置无法满足系统全面的温热CO₂气腹研究的需要，缺乏良好的模拟人体温热CO2气腹的实验装置。At present, a complete experimental device for this type of system is still lacking. The related devices that have been reported are mainly realized by connecting simple pneumoperitoneum simulation equipment through _CO2 heating, humidification and constant temperature device. Among them, the heating, humidification and constant temperature of CO ₂ are mainly realized through the following three methods: ①The insufflation machine with built-in heating function is connected to the humidification device: such as the Stryker insufflation machine

Humidifier; ②The insufflation machine without built-in heating function is connected to the heating and humidifying device: such as a simple Stryker insufflation machine + Insufflow heat and humidity tube; ③Use an insufflation machine that can both heat and humidify, such as Smith&Nephew insufflation machine; simple Foreign reports on pneumoperitoneum simulation equipment are either vague or too simple. These experimental devices have the following problems: ①The heating can only reach a maximum of 41°C, which cannot reach the temperature above 41°C required for hot CO ₂ research; ②The temperature distribution of warm CO ₂ gas in a certain space is often uneven Yes, different parts have different temperatures, and when the space is large, the temperature difference can be large. However, the current experimental device, regardless of the heating and humidification method, measures the temperature and humidity at the gas outlet temperature of the instrument, and the temperature and humidity probe is a single probe, which cannot move freely, and cannot be placed in the pneumoperitoneum simulation equipment to measure the pneumoperitoneum. The actual temperature of a specific part, so although there is a constant temperature adjustment device and adjustment ability, but because the probe is fixed, only the gas temperature and humidity at the gas outlet of the instrument can be guaranteed, and the temperature and humidity of a specific part in the pneumoperitoneum cannot be guaranteed; ③ Insufficient pneumoperitoneum simulation equipment : Lack of corresponding well-matched pneumoperitoneum simulation equipment, simple structure of pneumoperitoneum simulation device leads to pneumoperitoneum simulation distortion, such as lack of simulation of human abdominal wall temperature, volume does not conform to the actual pneumoperitoneum capacity of human body, etc., insufficient control of research factors such as pressure and flow , the temperature distribution of warm _CO2 gas is unknown, etc. Generally speaking, the current experimental devices cannot meet the needs of systematic and comprehensive warm _CO2 pneumoperitoneum research, and there is a lack of good experimental devices for simulating human warm CO2 pneumoperitoneum.

Contents of the invention

The invention provides an insufflation box that can heat and humidify _CO2 gas to a specified temperature and humidity and keep it constant. The input capacity and pressure are comparable to those of human pneumoperitoneum. The probes in the box can be preset to realize warming of _CO2 gas An experimental device that simulates the human body's warm CO ₂ pneumoperitoneum, which is well simulated and used for system research.

Technical scheme of the present invention is:

An experimental device for simulating human body temperature _CO2 pneumoperitoneum, the outlet of the medical _CO2 cylinder is connected to the inlet of the gas pressure reducing valve; the _CO2 flowmeter is connected in series between the inlet of the hot and humid _CO2 generator and the outlet of the pressure reducing valve Between, the outlet of the hot-humid _CO2 generator is connected with the inlet of the insufflation box; and there are constant temperature and humidity detection and control devices leading to the detection end and the control end; And the vapor mist temperature probe of the atomizer part of the hot and humid _CO2 generator; the control end has the _CO2 heating of the hot and humid _CO2 generator and the atomized liquid heating control end, the box heating control end and the ultrasonic vibrator control end. It is composed of connections; its characteristics are: the gas abdomen box with a capacity comparable to the human abdominal cavity is a hollow hexahedron made of heat-insulating resin material, the outside of the box wall is tightly covered with aluminum foil from inside to outside, and asbestos heating with heating resistance wire Belt, the outer layer is wrapped with a thermal insulation cover made of soft thermal insulation foam; there are three pipes communicating with the gas abdomen box; one is the upward air intake pipe, which is connected to the mixer part (mixer) of the hot and humid CO ₂ generator The outlets are connected, one inlet end of the mixer is connected with the outlet end of the _CO2 heater, the other inlet end of the mixer is connected with the outlet end of the hot and humid atomizer; the other two through pipes, one with a control The valve is located at the top of the gas outlet pipe parallel to the air inlet, and the _other is at the bottom with the gas outlet pipe with the control valve; The heating column, the heating sheet is coiled in a spiral shape to form a drill-like structure, and is tightly covered with a stainless steel sleeve to form a spiral heating air channel. The heating column is heated and transferred to the spiral heating sheet and the coated steel sleeve, and the gas passes through the spiral gas The three together heat it; the atomizer is a closed container filled with water, above the water there is a nozzle leading to the outside, and in the water in the middle and lower part of the box, each has a controlled heating body and an ultrasonic vibrator. The mixer has a thick tube with an opening on the wall of the thick tube. From the opening along the direction of the extension of the thick tube, a tapered tube with a smaller diameter is inserted in parallel, bent at the center of the thick tube, and parallel to the wall of the thick tube. , the thin tube opening is located in the center of the thick tube; the thin tube extending perpendicular to the thick tube wall and the outer wall of the thick tube are covered with an insulating layer; the thin tube opening protruding from the thick tube wall is connected to the outlet of the _CO2 heater , the inlet of the thick tube is connected to the outlet of the nebulizer, and the outlet of the thick tube is connected to the inlet of the insufflation box.

The positive effect after implementing the present invention is to provide a kind of _CO temperature, humidity, flow rate and pressure etc. can control the body temperature CO _{pneumoperitoneum} simulation experiment device, can simulate the human body heat pneumoperitoneum to the greatest extent outside the body, in The systematic study of warm CO2 pneumoperitoneum was completed on the basis of clarifying the temperature field distribution. In addition, this experimental device can also be widely used in the medical research of normal temperature CO2 and other different kinds of gases, and it can also be used in clinical operations with slight changes.

Description of drawings

Fig. 1, the system structure schematic diagram of the present invention

Figure 2. Schematic diagram of the structure of the gas-peritoneum box that simulates the human abdominal cavity

Fig. 3, Schematic diagram of the structure of the hot and humid _CO2 generator

Figure 4, Schematic diagram of the mixer principle

Detailed ways

The present invention will be further described now in conjunction with accompanying drawing

An experimental device for simulating human body temperature _CO2 pneumoperitoneum, the medical _CO2 steel cylinder 5 outlet is connected to the gas pressure reducing valve 4 inlet; the _CO2 flow meter 3 is connected in series to the inlet 20 of the hot and humid _CO2 generator 2 Between the outlets of the decompression valve 4, the outlet of the hot-humid _CO2 generator 2 is connected to the inlet of the gas-peritoneum box 6; there is a constant temperature and humidity detection and control device 1 that leads to a detection terminal and a control terminal; The temperature and humidity probe 15, _the box wall temperature probe 7, and the vapor mist temperature probe 32 of the atomizer part of the hot and humid _CO generator 2; the control end has CO heating and atomization _liquid heating of the hot and humid CO generator 2 The control terminal, the box heating control terminal and the control terminal of the ultrasonic vibrator 30 are connected together; it is characterized in that the inflated box 6 with a capacity comparable to the abdominal cavity of the human body is a hollow hexahedron made of heat-insulating resin material, and the outside of the box wall is composed of It is tightly covered with aluminum foil from the inside to the outside, and an asbestos heating belt wrapped with a heating resistance wire 13, and the outer layer is wrapped with a heat preservation cover made of soft heat-insulating foam; there are three pipes communicating with the gas abdomen box 6; Pipe 10, connected to the outlet of the mixer part (mixer) 26 of the hot and humid _CO generator, one inlet end of the mixer 26 connected to the outlet end of the _CO heater 19, and the other inlet end of the mixer It is connected with the outlet end of the nebulizer 28 of the hot and humid _CO2 generator; the other two ducts, one with the control valve 8, is located at the top upwards and the gas outlet duct 9 parallel to the air inlet, and the other is at the The gas outlet duct 17 with the control valve 18 at the bottom; the _CO2 heater 19 is a cylindrical cavity with a fixed electric heating column 24 at the bottom of the vertical cavity in the center, and the heating sheet 22 is spirally coiled on it, forming a drill bit Shaped structure, tightly covered with stainless steel sleeve 23, forming a spiral heating air channel, the heating column is heated and transferred to the spiral heating sheet and the coated steel sleeve, and the three heat it together when the gas passes through the spiral air channel; atomizer 28 It is an airtight container filled with water 29, and there is an external nozzle above the water. In the water in the middle and lower parts of the box, there are respectively controlled heating bodies 31 and ultrasonic vibrators 30; the mixer 26 has a thick tube 35. There is an opening on the wall of the thick tube. From the opening along the extension direction of the thick tube, a tapered tube with a smaller diameter is inserted in parallel, bent at the center of the thick tube, parallel to the wall of the thick tube, and the thin tube mouth 34 is at The inner center of the thick tube; the thin tube extending vertically from the thick tube wall and the outer wall surface of the _thick tube are all covered with an insulating layer 33; The outlet of the atomizer and the outlet of the thick tube are connected to the inlet of the insufflation box.

Among them, 11 is the insulation cover of the pneumoperitoneum box; 12 is the wall of the pneumoperitoneum box; 14 is the pressure gauge with a probe; 16 is the carrier of the medical experiment object; 17 is the lower air outlet; 21 is the heat insulation cover of the heater; probe.

Now explain the principle of the mixer:

When _CO enters the heater 19 from the port 20, hot _CO enters the capillary of the mixer 26, passes through the tapered pipe 25 with a smaller diameter, and _{the CO} gas sprays to the inner pipe of the thick pipe 35 from the pipe 25 at a high speed, and The mist is sucked into the mixed gas channel 27, and the mist and _CO2 gas are uniformly mixed.

Claims (1)

1. An experimental device for simulating human body temperature _CO2 pneumoperitoneum, the outlet of a medical _CO2 cylinder (5) is connected to the inlet of a gas pressure reducing valve (4); the _CO2 flowmeter (3) is connected in series to the hot and humid CO2 ₂ Between the inlet (20) of the generator (2) and the outlet of the pressure reducing valve (4), the outlet of the hot and humid _CO2 generator (2) is connected to the inlet of the insufflation box (6); and there is constant temperature and humidity detection , the control device (1) leads to the detection end and the control end; the detection end has the temperature and humidity probe (15) in the gas abdomen box, the box wall temperature probe (7) and the nebulizer part of the hot and humid _CO2 generator (2) The vapor mist temperature probe (32); the control end is composed of the _CO heating control end of the hot and humid _CO generator (2), the atomization liquid heating control end, the box heating control end and the ultrasonic vibrator (30) control end. It is characterized in that the gas-peritoneum box (6) with a capacity comparable to the abdominal cavity of a human body is a hollow hexahedron made of heat-insulating resin material, the outer side of the box wall is tightly covered with aluminum foil from the inside to the outside, and a heating resistance wire (13) is wound around it. The asbestos heating belt, the outer layer is covered with a thermal insulation cover made of soft thermal insulation foam; there are three pipes communicating with the gas abdomen box (6); one is an upward air intake pipe (10), which is connected to the hot and humid _CO2 generator The outlet of the mixer (26) is connected; an inlet port of the mixer (26) is connected with the outlet end of the _CO heater (19); the other inlet port of the mixer is connected with the atomizer of heat and humidity The outlet ends of (28) are connected; the other two through-pipes, one with a control valve (8) is located at the top upwards and the air outlet through-pipe (9) parallel to the air inlet, and the other is at the bottom with a control valve (8). The air outlet duct (17) of the valve (18); the _CO2 heater (19) is a cylindrical inner cavity, the center has a fixed electric heating column (24) at the bottom of the vertical cavity, and the heating sheet (22) is spirally coiled around it. above form like The head-shaped structure is tightly wrapped with a stainless steel sleeve (23) outside to form a spiral heating air passage; the atomizer (28) is a closed container for filling water (29), and there is an external nozzle above the water. In the water in the middle and lower part of the body, there are respectively a heating body (31) and an ultrasonic vibrator (30) with control; the mixer (26) has a thick tube (35), and there is an opening on the thick tube wall. In the extension direction of the thick tube, insert a gradually smaller tapered tube in parallel, bend at the center of the thick tube, and be parallel to the thick tube wall, and the thin tube mouth (34) is in the center of the thick tube; extend perpendicularly to the thick tube wall The surface of the thin tube and the outer wall of the thick tube are all covered with an insulating layer (33); the thin tube opening protruding from the thick tube wall is connected to the outlet of the _CO heater, the inlet of the thick tube is connected to the outlet of the atomizer, and the outlet of the thick tube is connected to the gas Belly box entrance.

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