357 results about "Anaesthesia machine" patented technology

A portable anesthetic machine or device is comprises a chassis having a cradle which removably receives a vaporizer. The device also includes a control panel and a carrying / support member. The control panel and support member are pivotal relative to each other to selectively change the machine from a carrying configuration or position to a use configuration or position. The control panel includes a gas flow path having gas inputs which receive carrier gases from sources of carrier gases, a manifold which combines the gases; a carrier gas outlet and a carrier gas inlet connectable to the vaporizer input and vaporizer outlet, respectively, a common gas port to which a patient cannula can be connected, and flow control devices in the gas flow path to control the flow rate of the carrier gases into the device. A controller is also provided which controls the flow of gas into and around the vaporizer based on vaporizer pressure and temperature, ambient pressure and temperature to maintain a substantially constant concentration of anesthetic agent in the gas stream delivered to the patient without the need to adjust the flow of gases from the gas supply sources.

The present invention provides an integrated anesthesia machine with at least one display adjustably integrated into to the main body of the machine so as not to protrude out of the frame and thereby not obstruct the operator's view of the operation site. The anesthesia machine generally includes a machine frame appropriately equipped for use in administering anesthesia to subjects during a surgical intervention at least one display, such as a flat panel display, for patient monitoring that is adjustably mounted to the machine frame.

The invention discloses an anaesthetic machine, a gas path system comprises an inhalation gas path with an inhalation valve; a flow sensor is arranged in the gas path system and electrically connected with a parameter processing unit for detecting the real-time flow rate of the inhalation gas path; and the parameter processing unit transmits an electrical signal of the flow sensor to a main controller after the processing. The invention further discloses a calibration method of the inhalation valve of the anaesthetic machine, comprising the steps that the main controller controls the opening degree of a valve of the inhalation valve, and the real-time gas flow rate of the corresponding inhalation valve is obtained by the flow sensor, thus obtaining a valve opening table and a valve closing table. The usage of the anaesthetic machine of the technical proposal of the invention only adds one flow sensor, thus having low cost, convenience and practicality. The usage of the calibration method of the inhalation valve of the anaesthetic machine of the technical proposal of the invention can automatically complete the calibration of the inhalation valve after connecting the gas path by a user, thus being convenient and rapid and ensuring the mechanical ventilation of the anaesthetic machine to be more secure and reliable.

The invention discloses a method for measuring the tidal volume of an anaesthetic machine, which can effectively improve the measurement accuracy of medical anaesthetic machine in measuring the tidal volume breathed in or out by patients. The method comprises the following steps: (1) the average value measured by a flow sensor at the prior breathing-out or breathing-in stage is calculated; (2) the flow value of patients at the current breathing-out or breathing-in stage are collected; (3) the flow value of patients at the current breathing-out or breathing-in stage deducts the average value measured by the flow sensor at the prior breathing-out or breathing-in stage and the integration are accumulated in the whole breathing-out or breathing-in stage, thereby obtaining breathing-out or breathing-in tidal volume value; all factors interfering the flow measurement are compensated in real time so as to prevent the measurement results from being affected by the component, the pressure, the temperature, atmospheric pressure and environmental temperature thus achieving the purpose of correctly measuring the breathing-out or breathing-in tidal volume, greatly improving the controllability of anaesthetic effect and realizing the purpose of the method.

The invention relates to a method for automatically calibrating the tidal volume of an anesthetic machine, comprising the following steps that: firstly, the respiratory frequency and the respiratroy quotient of the anesthetic machine are set; secondly, an initial point and a plurality of intermediate flow rate points are selected as index points within a calibrated flow rate range; thirdly, the value of the tidal volume is obtained through calculation of a formula V=FT; fourthly, a calibrated tidal volume measuring device is used as reference to search for calibrated tidal volumes one by one and automatically save PWM values of searched tidal volumes; fifthly, a fitting curve chart of the flow rate L and the PWM values is established by utilization of the calibrated tidal volumes according to the set respiratory frequency, the set respiratroy quotient and the corresponding flow rate calculated in the formula of the third step; the flow rate value can be calculated according to the set tidal volume under the condition of the set respiratory frequency and the set respiratroy quotient; and the PWM value at the time can be calculated according to the fitting curve chart to control the flow rate, thereby the method realizes automatic calibration of the tidal volume and avoids affection of the dead space volume of devices, the aperture of pipes, the self weight of windboxes and the external factors on calibration of the tidal volume.

The invention is applicable to the technical field of medical equipment, discloses an anesthesia machine respiratory system and an anesthesia machine. The anesthesia machine respiratory system comprises a drive branch and a gas exhaust pipeline. The anesthesia machine respiratory system also comprises a switching device used for selectively guiding gases breathed out by a patient into the drive branch and or the gas exhaust pipeline to realize switching between re-inhaling or non-re-haling. The switching device is connected to the drive branch and the gas exhaust pipeline. The drive branch is connected to an absorption device. The anesthesia machine comprises the above the anesthesia machine respiratory system. According to the anesthesia machine respiratory system and the anesthesia machine provided by the invention, rapid switching between a non-re-haling system and a re-inhaling system can be realized. In the mode of the non-re-haling system, medical workers do not need to pay attention to whether a carbon dioxide absorbent in the absorption device needs to be replaced, so that burdens for the medical workers are reduced, and the usage is convenient.

The invention provides a gas mixing module, and a breathing machine and an anesthesia machine with the same. The gas mixing module comprises a shell (5), a mandrel (2), and a stepping motor (9), wherein the shell (5) has a mixing cavity (52), and a first cavity (51) and a second cavity (53) which are arranged on two sides of the mixing cavity (52) respectively, and the first cavity (51) and the second cavity (53) are communicated with the mixing cavity (52) through a first air outlet (512) and a second air outlet (532) respectively; the mandrel (2) passes through the first cavity (51), the mixing cavity (52) and the second cavity (53) axially in turn and has a shoulder (22) which is accommodated in the mixing cavity (52); and the stepping motor (9) drives the mandrel (2) to move axially, and the opening of the first air outlet (512) and the second air outlet (532) is changed simultaneously through the axial movement of the shoulder (22). The gas mixing module can accurately control the position of the shoulder of the mandrel in the mixing cavity, improve the positioning repeatability of the mandrel, and improve the accuracy and reliability of the breathing machine and the anesthesia machine.

The invention discloses a portable field anesthetic machine, which is structurally characterized by comprising a main frame, an integrated circuit module, a volatile tank module and a gas-flow rate control module, wherein the integrated circuit module, the volatile tank module and the gas-flow rate control module are easily detachably connected to the main frame; the gas-flow rate control module is provided with a gas input port for externally accessing oxygen and air, and the gas output port of the gas-flow rate control module is connected with the input port of the volatile tank module; the integrated circuit module comprises an expiration port, a suction port and a manual control bladder; the mixed gas output port of the volatile tank module is connected with the gas input end of the integrated circuit module through a one way valve 1; the control input end of the integrated circuit module is connected with a gas output end of the manual control bladder; and the expiration port and the suction port of the integrated circuit module are connected with a respiration pipe for the patient to breathe through a one way valve 2 and a one way valve 3 respectively. The invention connects the main frame, the integrated circuit module and the volatile tank module together through a connecting pipe, so that the volume of the anesthetic machine is greatly reduced.

An anesthesia machine and respirator proportion valve flow pushing and fondling control method is disclosed. A flow value corresponding to a proportion valve opening control curve is stored in a read-write memory of a controller. A flow sensor and a proportional valve are formed a PID control system. A feedback control flow velocity is calculated through adjusting a PID control parameter. A size of the opening of the proportional valve is determined through inquiring a flow velocity value corresponding to the corresponding proportion valve opening control curve in the memory. And the flow sensor is used to perform monitoring and cyclical feedback. The PID control parameter is set classifiedly for different needed control flow. The parameter in each classification is smoothly transited through a linear fit mode. During controlling the small flow under 10LPM, an adjustable short-time large current shock is added at starting time of establishing the required flow from the 0LPM. The short-time large current is used to burst through a valve core in the proportional valve so as to realize rapid adjusting of the proportional valve.

The invention mainly relates to an anesthesia machine, which is formed by a frame, a gas delivery system, an anesthetic evaporator, a respiration loop, a respirator, a safety monitoring system and a waste gas scavenging system, wherein the gas conveying system, the anesthetic evaporator, the respiration loop, the respirator, the safety monitoring system and the waste gas scavenging system are arranged on the frame. An object storage drawer is arranged above the frame, the gas delivery system and the anesthetic evaporator are arranged above the object storage drawer and are connected with each other, and the anesthetic evaporator is connected with the respiration loop connected with the respirator. The safety monitoring system is arranged above the respiration loop, the waste gas scavenging system is further connected with the position below the respiration loop, and the safety monitoring system comprises a data acquisition unit, a communication unit and a computer. The anesthesia machine has a simple and reasonable structure, can monitor depth of anesthesia, improves safety and effectiveness of the anesthesia of patients, and is suitable for popularization and application.

A cassette for vaporization of anesthetic agent for delivery to a patient is arranged to be received by an anesthesia machine which has control mechanisms for controlling vaporization of the agent. In a preferred arrangement, the cassette includes a housing for receiving, containing and emitting anesthetic agent. A sensor, such as a pressure sensor or a temperature sensor is embedded in the housing for obtaining a value of the agent contained in the reservoir. The sensor is operatively connected to the reservoir to obtain an accurate value of the agent. A communication link is provided between the sensor and the control mechanisms of the anesthesia machine when the cassette is received by the anesthesia machine. The cassette thus provides a simplified arrangement that efficiently and accurately provides values of the anesthetic agent being vaporized in the reservoir.

The invention discloses a gas flowmeter and a throttling device used therein, a breathing machine and an anaesthesia machine. The throttling device is arranged in a pipeline through which gas flows, and is provided with throttling holes; and the sectional area of each throttling hole is smaller than that of the pipeline through which the gas flows and is increased with the increase of the flow ofthe gas reaching the throttling device (3). The throttling device ensures that the gas flowmeter provides an enough measurement range and meets measurement accuracy, and the gas flowing resistance cannot be obviously increased when the flow of the gas is large.

The invention provides a control change-over valve for an anaesthesia machine, which comprises a valve body, a change-over switch and a control device, wherein the valve body is provided with a valve cavity, an air inlet, a first air outlet and a second air outlet; the change-over switch is arranged in the valve cavity and divides the valve cavity into three parts which are a first part, a second part and a third part, wherein the first part is communicated with the first air outlet, the second part is communicated with the second air outlet, the third part is communicated with the air inlet, the third part is provided with a first valve port and a second valve port which are opposite, the first part is communicated with the third part through the first valve port, the second part is communicated with the third part through the second valve port, and the change-over switch is provided with a valve port sealing part; and the control device is driven by the control air of the anaesthesia machine, and controls the movement of the valve port sealing part in order to seal the first valve port and the second valve port. The control change-over valve for the anaesthesia machine of the invention realizes the change-over of manually-controlled air filling and machine-controlled air filling for the anaesthesia machine, has simple structure and good stability and is simple to install.

The invention discloses an anaesthesia machine flow sensor calibration method and device. The method includes the steps of connecting a monitoring device with a flow sensor in series, closing an exhalation valve, changing the opening degree of the exhalation valve according to the gradually-increasing / gradually-decreasing rule, conducting filtering on the values of monitored flow and the values of the voltage outputted by the flow sensor, reading and recording the monitored value and the value of the voltage outputted by the flow meter for each opening degree of the exhalation valve, generating voltage-flow data tables and the like, and obtaining a set of voltage-flow data tables by presetting a set of organized flow values through the table look-up or interpolation method, wherein the voltage-flow data tables include the flow meters conforming to the equal difference rule or other rules. In the method and device, filtering is adopted, accuracy of calibration is improved, calibration data are simplified into one-dimensional voltage data to be stored, and actual use of the data is facilitated; in addition, the calibration process is automatically completed through a preset program, and the work efficiency is high.

The invention is applicable to the field of electronic medical equipment and provides a ventilation mode switching equipment and method as well as an anesthesia machine and a breathing machine. The ventilation mode switching equipment comprises a touch screen used for receiving pending ventilation mode selection information and current ventilation mode switching information, and a current mode switching unit used for switching the current ventilation mode into a ventilation mode specified in pending ventilation mode selection information outputted by the touch screen after receiving current ventilation mode switching information outputted by the touch screen. According to the invention, the current mode switching unit switches the current ventilation mode into the ventilation mode specified in the pending ventilation mode selection information outputted by the touch screen after receiving the current ventilation mode switching information outputted by the touch screen, and the pending ventilation mode selection information and the current ventilation mode switching information, which are inputted by a user, are received by the touch screen completely, so that the operation distance and the operation complexity can be reduced when the ventilation mode is switched, and the operation efficiency can be improved.

Lung ventilator (14) and / or anaesthesia machine with a blender for mixing a pressurised medical gas, e.g. oxygen, with air drawn in by a blower (1 ), comprising a gas line (10) for the medical gas, and an air line (1 1 ), which open into a common breathing gas line (12), whereby the opening of the gas line (10) into the common gas line (12) is downstream of the blower (1 ) and in the gas line (10) a regulating valve (8) is provided for variable adjustment of the gas flow and in the common breathing gas line (12) a regulating valve (4) is provided for dosing the breathing gas, and whereby in the breathing gas line (12) a flow sensor (3) is provided for measuring the breathing gas flow and in the gas line (10) a flow sensor (9) is provided for measuring the gas flow.

The invention discloses an anesthesia machine system, comprising a gas source supply pipeline used for providing a gas source, a breathing circuit connected with a patient, and an air supply branch circuit, wherein a gas flow output end of the gas source supply pipeline and an air flow output end of the air supply branch circuit are respectively connected with the breathing circuit; the breathing circuit is internally provided with a pressure sensor used for measuring air pressure in the breathing circuit when the patient inhales; the air supply branch circuit comprises an air box, a one-way valve and a proportional electromagnetic valve which are sequentially connected by pipes along an air supply direction, wherein the opening degree of the proportional electromagnetic valve is changed according to measurement parameters measured by of the pressure sensor. The opening degree of the proportional electromagnetic valve is continuously changed and is also promoted to be changed by the change of a numerical value of the pressure sensor caused by neonatal tidal volume; anesthesia mixed gas is extruded by the pressure of airflow produced by the air box for the patient to use; the anesthesia machine system is accurate in control and wide in applicable people. The invention also discloses a control method of the anesthesia machine system.

The invention discloses a ventilation method for ensuring volume and limiting pressure of an anesthesia machine and a breathing machine. The method comprises the following steps of: self-detecting the pipeline compliance of the anesthesia machine and the breathing machine in the startup process; in the process of starting breathing control, when the air resistance (R) value and the compliance (C) value of a patient are not monitored correctly, using a volume ventilation mode and monitoring the R value and the C value of the patient in the ventilation period; if the R value and the C value of the patient are correctly monitored, monitoring the suction volume of the patient in a suction period by a compliance compensated volume ensuring method, and performing volume ensuring processing after a set volume is achieved; and calculating a standard control pressure value P of a system, performing suction valve and expiration valve cooperative pressure control according to the value P, calculating the expiration tidal volume of the patient, a volume difference value and a pressure difference value Delta P at an expiration stage, and performing feedback compensation control on the calculated value P according to the Delta P so as to ensure the volume and the pressure.

The present invention is a method and system for providing auxiliary power to an integrated anesthesia delivery and patient monitoring system. When AC main power is unavailable or inadequate to power a patient monitoring device of the integrated system, DC power from a battery in an anesthesia machine of the integrated system provides power to the patient monitoring device through a DC power connection. Distribution of the battery power is controlled by a first, normally closed solid state switch in the anesthesia machine and a second, normally open solid state switch in the patient monitoring device. The battery is also configured to provide DC power to the anesthesia machine when AC mains power is unavailable to the anesthesia machine. The method and system utilizes required DC auxiliary power from the anesthesia machine to provide DC auxiliary power to the other devices.

The invention provides a one-way valve which comprises a valve boy, an adapter, a second end air inlet C, a second end air outlet B, a seal ring, a seal gasket and an elastic part, wherein a first internal channel communicated with the outside is arranged inside the valve body, and the end of the valve body is provided with a first end air inlet A of the first internal channel; the adapter is arranged in the first internal channel and comprises a second internal channel communicated with the first internal channel and a side air inlet D arranged on the side of the adapter; the second end air inlet C and the second end air outlet B are respectively located on both ends of the second internal channel; the seal ring is sheathed outside the adaptor and is arranged between the valve body and the adaptor; the seal gasket is arranged between the first end air inlet A and the second end air inlet C and has a shape applicable to sealing the shape of the first end air inlet A, and the edge of the seal gasket is provided with an air outlet opening; and the elastic part is abutted and pressed between the seal gasket and the adaptor. The invention also provides an anaesthesia machine which comprises the one-way valve, and the one-way valve is arranged on an air inlet of the anaesthesia machine.

The invention provides a breathing machine, an anaesthesia machine and a flow proportional valve. The flow proportional valve comprises a shell body, wherein an inlet and an outlet are formed in the shell body. The flow proportional valve further comprises a magnet yoke, a central shaft sleeve, a sliding shaft, and a magnet which are installed inside the shell body. The magnet yoke comprises a guide portion. The guide portion comprises a fluid channel, wherein a first end of the fluid channel is communicated with the inlet. The central shaft sleeve comprises an axial hole, the central shaft sleeve is fixedly sleeved on the guide portion through the axial hole, a first opening which is communicated with the axial hole is formed in the peripheral wall of the central shaft sleeve, and the first opening is communicated with the outlet. A coil is arranged on the sliding sleeve, the sliding sleeve can be sleeved on the central shaft sleeve in a sliding mode, and the sliding sleeve is provided with a communicating position which enables the first opening and the outlet to be communicated. By applying certain pulsed voltage on the coil, control of the opening degree of the first opening in the central shaft sleeve by the sliding sleeve is realized, and the purpose of high flow proportional control under the low-pressure state is achieved. In addition, the flow proportional valve has the advantages of being simple in structure, fast in responding speed, high in repeated accuracy, and long in service life.

The present invention proposes a safety valve self-inspection method, system and anesthesia machine. The method includes the following steps of closing the gas outlet, opening the pressure sensor, and opening the intake valve; detecting the air pressure and recording the air pressure value P0; delaying for t seconds Finally, detect the air pressure value Pt; make a judgment, if Pt=P0, stop pressurizing, and record the final pressure value Pt. The invention enables the medical equipment of the respiratory system with the ventilation safety valve device to automatically detect the opening threshold of the safety valve before each use, is simple to operate and easy to implement, and simultaneously improves the safety of the medical equipment.

The invention discloses a power supply control device of a magnetic valve flow in an anaesthesia machine. The power supply control device of the magnetic valve flow in the anaesthesia machine comprises a signal generation controller circuit, a power supply chip, a magnetic valve, a constant flow source circuit and a power supply chip input control circuit, wherein the power supply chip input control circuit is used for sending a signal output by the signal generation controller circuit to the power supply chip, and the power supply chip outputs voltage to the magnetic valve. The signal generation controller circuit directly controls a size of constant flow source current through controlling a ratio relationship between a signal and a constant flow source, so that the fact that the constant flow source controls the magnetic valve flow is achieved. The power supply control device reduces the risk of a single fault in the prior art and solves the problems of pipe pressure reducing and heating due to the fact that an MOS pipe is adopted to be served as a control power source switch. The power supply control device is simple in structure, safe by the adoption of opto-isolator protection, high in control accuracy and suitable for fields of industrial control.

The embodiment of the invention discloses a lung recruitment maneuver ventilation control method used for setting in an anaesthesia machine so as to monitor the lung recruitment maneuver process. The method comprises the following steps that lung recruitment maneuver ventilation parameters are set through a human-computer interface; lung recruitment maneuver ventilation operation is performed according to the set lung recruitment maneuver ventilation parameters; when an abnormity occurs in the lung recruitment maneuver ventilation operation process, a quit key is clicked to quit the lung recruitment maneuver function, and the ventilation mode adopted before lung recruitment maneuver ventilation is performed is restored. The embodiment of the invention correspondingly discloses a lung recruitment maneuver ventilation control device. The lung recruitment maneuver ventilation control method and device have the advantages that operation is simple, and the ventilation operation state adopted before lung recruitment maneuver can be easily and quickly restored.

An anesthesia system is disclosed herein. The system includes an anesthesia machine comprising an anesthesia machine input, and a stand-alone vaporizer connected to the anesthesia machine. The stand-alone vaporizer includes a vaporizer input. The stand-alone vaporizer is configured to produce a selectable concentration of an anesthetic agent. The anesthesia machine input and the vaporizer input may be independently implemented to regulate the concentration of the anesthetic agent from the stand-alone vaporizer.

The invention discloses a volatile anesthetic dosage monitoring system, belongs to the technical field of medical monitoring and solves the problems that in the prior art, the initially added anesthetic mass cannot be detected, the residual anesthetic mass cannot be detected in real time, the using speed of anesthetic cannot be detected, and the residual using time of residual anesthetic cannot be detected. The system comprises an anaesthesia machine which is provided with a display screen and a volatilization pot, wherein a weighing sensor is arranged between the anaesthesia machine and the volatilization pot. One end of the weighing sensor is electrically connected with a microprocessor which comprises an anesthetic initial mass operational module, an anesthetic residual mass operational module, an anesthetic residual volume operational module, a unit time anesthetic using speed operational module and a residual anesthetic using time operational module. The microprocessor is electrically connected with the display screen on the anesthesia machine. The invention further discloses a method for realizing the volatile anesthetic dosage monitoring system.

The invention provides a universal internal loop disinfector. The disinfector comprises a gas conveying device, a hydrogen peroxide charging device, a moisture removing device, a gas exhausting device and a draining device. The disinfector disclosed by the invention has the beneficial effect that both an anaesthesia machine and a breathing machine can be disinfected by taking ozone and a hydrogen peroxide disinfectant as basic disinfecting mediums in a way of switching gas paths inside the disinfector, thereby solving the problem that an internal loop of a conventional breathing machine is difficultly disinfected; the disinfector disclosed by the invention has the characteristics of novel structure and multiple purposes and also can be used for remarkably lowering the buying cost of a medical unit.

The invention discloses an anaesthesia machine upgrading method and device. The anaesthesia machine upgrading method comprises that an anaesthesia machine obtains to-be-upgraded software versions which are corresponding to one or a plurality of assemblies of the anaesthesia machine; the anaesthesia machine sends upgrading commands to the one or the plurality of assemblies, wherein the upgrading commands are used for indicating the one or the plurality of assemblies to switch from working modes to upgrading modes; the anaesthesia machine upgrades existing software versions which are corresponding to the one or the plurality of assemblies to the to-be-upgraded software versions. The anaesthesia machine upgrading method enables upgrading of the anaesthesia machine to be simple and improves the upgrading efficiency to some extent.