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69 results about "High-frequency ventilation" patented technology
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High-frequency ventilation is a type of mechanical ventilation which utilizes a respiratory rate greater than four times the normal value. (>150 (Vf) breaths per minute) and very small tidal volumes. High frequency ventilation is thought to reduce ventilator-associated lung injury (VALI), especially in the context of ARDS and acute lung injury. This is commonly referred to as lung protective ventilation. There are different types of high-frequency ventilation. Each type has its own unique advantages and disadvantages. The types of HFV are characterized by the delivery system and the type of exhalation phase.
Electrosurgical generator
ActiveUS20150320481A1Increase productionRelieve painElectrotherapyDiagnosticsSonificationReturn current
This invention relates to high-frequency ablation of tissue in the body using a cooled high-frequency electrode connected to a high frequency generator including a computer graphic control system and an automatic controller for control the signal output from the generator, and adapted to display on a real time graphic display a measured parameter related to the ablation process and visually monitor the variation of the parameter of the signal output that is controlled by the controller during the ablation process. In one example, one or more measured parameters are displayed simultaneously to visually interpret the relation of their variation and values. In one example, the displayed one or more parameters can be taken from the list of measured voltage, current, power, impedance, electrode temperature, and tissue temperature related to the ablation process. The graphic display gives the clinician an instantaneous and intuitive feeling for the dynamics and stability of the ablation process for safety and control. This invention relates to monitoring and controlling multiple ground pads to optimally carry return currents during high-frequency tissue ablation, and to prevent of ground-pad skin burns. This invention relates to the use of ultrasound imaging intraoperatively during a tissue ablation procedure. This invention relates to the use of nerve stimulation and blocking during a tissue ablation procedure.
Owner:COSMAN INTRUMENTS LLC
Electrosurgical generator
This invention relates to high-frequency ablation of tissue in the body using a cooled high-frequency electrode connected to a high frequency generator including a computer graphic control system and an automatic controller for control the signal output from the generator, and adapted to display on a real time graphic display a measured parameter related to the ablation process and visually monitor the variation of the parameter of the signal output that is controlled by the controller during the ablation process. In one example, one or more measured parameters are displayed simultaneously to visually interpret the relation of their variation and values. In one example, the displayed one or more parameters can be taken from the list of measured voltage, current, power, impedance, electrode temperature, and tissue temperature related to the ablation process. The graphic display gives the clinician an instantaneous and intuitive feeling for the dynamics and stability of the ablation process for safety and control. This invention relates to monitoring and controlling multiple ground pads to optimally carry return currents during high-frequency tissue ablation, and to prevent of ground-pad skin burns. This invention relates to the use of ultrasound imaging intraoperatively during a tissue ablation procedure. This invention relates to the use of nerve stimulation and blocking during a tissue ablation procedure.
Owner:COSMAN INTRUMENTS LLC
Electrosurgical generator
ActiveUS20150320478A1Increase productionRelieve painElectrotherapyDiagnosticsSonificationReturn current
This invention relates to high-frequency ablation of tissue in the body using a cooled high-frequency electrode connected to a high frequency generator including a computer graphic control system and an automatic controller for control the signal output from the generator, and adapted to display on a real time graphic display a measured parameter related to the ablation process and visually monitor the variation of the parameter of the signal output that is controlled by the controller during the ablation process. In one example, one or more measured parameters are displayed simultaneously to visually interpret the relation of their variation and values. In one example, the displayed one or more parameters can be taken from the list of measured voltage, current, power, impedance, electrode temperature, and tissue temperature related to the ablation process. The graphic display gives the clinician an instantaneous and intuitive feeling for the dynamics and stability of the ablation process for safety and control. This invention relates to monitoring and controlling multiple ground pads to optimally carry return currents during high-frequency tissue ablation, and to prevent of ground-pad skin burns. This invention relates to the use of ultrasound imaging intraoperatively during a tissue ablation procedure. This invention relates to the use of nerve stimulation and blocking during a tissue ablation procedure.
Owner:COSMAN INTRUMENTS LLC
Electrosurgical generator
ActiveUS20150320480A1Increase productionRelieve painElectrotherapyDiagnosticsSonificationReturn current
This invention relates to high-frequency ablation of tissue in the body using a cooled high-frequency electrode connected to a high frequency generator including a computer graphic control system and an automatic controller for control the signal output from the generator, and adapted to display on a real time graphic display a measured parameter related to the ablation process and visually monitor the variation of the parameter of the signal output that is controlled by the controller during the ablation process. In one example, one or more measured parameters are displayed simultaneously to visually interpret the relation of their variation and values. In one example, the displayed one or more parameters can be taken from the list of measured voltage, current, power, impedance, electrode temperature, and tissue temperature related to the ablation process. The graphic display gives the clinician an instantaneous and intuitive feeling for the dynamics and stability of the ablation process for safety and control. This invention relates to monitoring and controlling multiple ground pads to optimally carry return currents during high-frequency tissue ablation, and to prevent of ground-pad skin burns. This invention relates to the use of ultrasound imaging intraoperatively during a tissue ablation procedure. This invention relates to the use of nerve stimulation and blocking during a tissue ablation procedure.
Owner:COSMAN INTRUMENTS LLC
Portable non-invasive ventilator with sensor
InactiveUS20060249155A1RespiratorsOperating means/releasing devices for valvesNon invasiveHigh-frequency ventilation
A ventilator has a microprocessor that assists in automatically determining an appropriate breathing mode, and either the microprocessor or some other circuitry utilizes the mask to deliver that mode. Contemplated breathing modes include all of the recognized breathing modes (i.e, controlled mandatory ventilation, synchronized intermittent mandatory ventilation, pressure controlled and / or pressure supported ventilation, and high frequency ventilation) as well as other breathing modes.
Owner:CPAIR
Cardiac signal processing apparatus and cardiac signal processing method
ActiveUS20130197377A1Eliminate distractionsComponent with highCatheterSensorsBand-pass filterEngineering
A cardiac signal processing apparatus includes: a unit for acquiring, from a heartbeat sensor, cardiac signals relating to heartbeats of a subject; a low-pass filter for allowing passage of those cardiac signals having a first predetermined frequency or lower, among the cardiac signals; higher harmonic noise acquisition unit for acquiring harmonic signals of low-frequency noise by performing high frequency extrapolation on the signals output from the low-pass filter; a high-pass filter for allowing passage of those cardiac signals having a second predetermined frequency or higher, among the cardiac signals; and higher harmonic noise removal unit for removing the harmonic signals of low-frequency noise from the signals output from the high-pass filter. It is thus made possible to remove noise from the cardiac signals and to obtain desirable heartbeat detection characteristics.
Owner:TOYOTA JIDOSHA KK
System and method for integrated high frequency oscillatory ventilation
ActiveUS20090229612A1RespiratorsOperating means/releasing devices for valvesHigh frequency oscillatory ventilationEngineering
An integrated ventilation system is presented. The integrated ventilation system comprises a high frequency ventilation module configured to be operationally coupled to a ventilation system, where the high frequency ventilation module is configured to aid the ventilation system in performing high frequency ventilation. A method for providing high frequency ventilation via use of a high frequency ventilation module, where the high frequency ventilation module is configured to be operationally coupled to a ventilation system, and where the high frequency ventilation module is configured to aid the ventilation system in performing high frequency ventilation, is presented. The method includes creating a vacuum effect at an outlet port of the ventilation system to aid in active exhalation of gas from a patient.
Owner:GENERAL ELECTRIC CO
Servo-controlled pneumatic pressure oscillator for respiratory impedance measurements and high-frequency ventilation
A pneumatic ventilation system delivers high amplitude, low frequency oscillatory flows while maintaining the load impedance at a specified mean pressure, thereby accurately controlling mean airway pressure, oscillation amplitude, and frequency content allowing use in applications to optimize high frequency ventilation protocols in patients. The pneumatic ventilation system includes a pneumatic pressure oscillator based on a proportional solenoid valve to provide forced oscillatory excitations to a respiratory system over a bandwidth suitable for mechanical impedance measurements and high frequency ventilation.
Owner:TRUSTEES OF BOSTON UNIV
Device and method for respirating a patient by means of high-frequency ventilation
ActiveUS7770580B2RespiratorsOperating means/releasing devices for valvesTidal volumeEmergency medicine
Owner:DRAGERWERK AG
High Frequency Airway Oscillation For Internal Airway Vibration
InactiveUS20160121062A1Facilitated releaseRespiratorsChiropractic devicesHigh-frequency ventilationBiomedical engineering
Owner:UNIV OF FLORIDA RES FOUNDATION INC
Device and method for respirating a patient by means of high-frequency ventilation
ActiveUS20080087284A1Accurate measurementReduce formationRespiratorsOperating means/releasing devices for valvesTidal volumeEmergency medicine
A device is provided for respirating a patient by means of high-frequency ventilation, which has at least one device for setting a desired tidal volume by a user, and which has at least one regulating device for regulating an amplitude of the respiration pressure and / or at least one regulating device for regulating the oscillation frequency on the basis of the tidal volume determined. A corresponding method is provided for regulating a device for respirating a patient by high-frequency ventilation and a method is provided for respirating a patient.
Owner:DRAGERWERK AG
Electrosurgical generator
ActiveUS20150320479A1Relieve painEvaluating efficacyElectrotherapyDiagnosticsSonificationReturn current
This invention relates to high-frequency ablation of tissue in the body using a cooled high-frequency electrode connected to a high frequency generator including a computer graphic control system and an automatic controller for control the signal output from the generator, and adapted to display on a real time graphic display a measured parameter related to the ablation process and visually monitor the variation of the parameter of the signal output that is controlled by the controller during the ablation process. In one example, one or more measured parameters are displayed simultaneously to visually interpret the relation of their variation and values. In one example, the displayed one or more parameters can be taken from the list of measured voltage, current, power, impedance, electrode temperature, and tissue temperature related to the ablation process. The graphic display gives the clinician an instantaneous and intuitive feeling for the dynamics and stability of the ablation process for safety and control. This invention relates to monitoring and controlling multiple ground pads to optimally carry return currents during high-frequency tissue ablation, and to prevent of ground-pad skin burns. This invention relates to the use of ultrasound imaging intraoperatively during a tissue ablation procedure. This invention relates to the use of nerve stimulation and blocking during a tissue ablation procedure.
Owner:COSMAN INTRUMENTS LLC
Automated detector and classifier of high frequency oscillations and indicator seizure onset
PendingUS20160045127A1Precise positioningElectroencephalographyElectrotherapyHigh-frequency ventilationBiomarker (petroleum)
High frequency oscillations (HFOs) are automatically detected in electroencephalogram (EEG) signals and analyzed to assess whether they are predictive of the onset of a neurological dysfunction in a subject or an indication of nonneurological electrical activity or noise in the EEG signal. In some examples, HFOs, serving as a biomarker for epileptic seizures, are identified and used to identify seizure networks within a patient for clinician monitoring or for controlling automated treatment systems. The analysis may be used to create enhanced EEG displays, with HFOs identified on the EEG.
Owner:RGT UNIV OF MICHIGAN
Injector Valve with Miniscule Actuator Displacement
InactiveUS20130068200A1Easy to controlEmission reductionElectrical controlOperating means/releasing devices for valvesActuatorControl theory
An injector comprising one or more piezoelectric driving stacks wherein a flow control member of the injector is driven directly by the one or more piezoelectric stacks without additional amplification means or interposing elements while a flow area of the nozzle is variably adjustable to deliver controlled flow rates in a desired flow profile to improve engine performance and reduce emissions. The injector is configured to support required flow rates with minimal linear movement of the flow control member. The injector and drive electronics are configured to deliver higher frequency operation and response with increased operational stability due to minimal response lag.
Owner:WEIDLINGER ASSOCIATES
Selective ionization using high frequency filtering of reactive ions
ActiveUS9070542B2Material analysis by electric/magnetic meansMaterial analysis by optical meansPhysical chemistryAtmospheric pressure
Selective ionization at atmospheric or near atmospheric pressure of a sample diluted in air is provided in multiple steps. Initially, components of air and / or other gas are ionized to generate reactive ions. The reactive ions are then filtered using a high frequency filter to yield selected reactive ions. Thereafter, the selected reactive ions are reacted with sample molecules of a sample being analyzed in a charge transfer process. Depending on the properties of the sample molecules, the filter may select some reactive ions to enter the sample zone and block others entirely thus controlling ion chemistry and charge transfer yields in the sample zone. The described system is directed to controlling ions at the ion source level, using a high frequency filter technique, in connection with subsequent analysis. The method generates the ions of choice for subsequent analysis in such platforms as ion mobility and differential mobility spectrometers.
Owner:LEIDOS SECURITY DETECTION & AUTOMATION INC
Frequency conversion high frequency electrotome
ActiveCN103083083AWide frequency selection rangeQuick identificationSurgical instruments for heatingSurgical operationEngineering
Disclosed is a frequency conversion high frequency electrotome. The input port (1) is connected with the input end of an electrode plate detecting and alarming circuit (2). An output signal display module (4), a high frequency generator (6) and a frequency conversion adjusting module (7) are respectively connected with an automatic test markup language (ATML) processor (5), and the output end of the frequency conversion adjusting module (7) is connected with a pre-amplifier (8). The pre-amplifier (8) is connected with the input end of a first power amplifier (10), the output end of the first power amplifier (10) is connected with the input end of a second power amplifier (11), and the output end of the second power amplifier (11) is connected with an output interface (13). After the frequency demultiplication of the frequency conversion high frequency electrotome is carried out through a crystal oscillator, the fundamental frequency and the repetition frequency are obtained, and operating modes of pure cutting, mix cutting, monopole solidification, spraying solidification and double pole solidification are achieved. In a surgical operation, the cutting speed is fast, harm to a tissue is little, and separation and solidification of the tissue of a human body can be achieved, so that the aims of cutting and bleeding stop are achieved, and the utilization effect is good.
Owner:武汉兰宝石医疗设备有限公司
Dynamic tuning of a gas turbine engine to detect and prevent lean blowout
ActiveUS20140277789A1Changing performance of the gas turbine engineExtended down-time of the gas turbine engineMechanical power/torque controlLevel controlCombustorEngineering
A method for tuning a combustor of a gas turbine engine based on one or more monitored operating conditions is provided. One or more operating conditions of the gas turbine engine are monitored. The monitored operating conditions may include, for example, a low frequency tone, a high frequency tone, and a ratio of the low frequency tone to the high frequency tone. It is determined whether the ratio of the low frequency tone to the high frequency tone is within a first predefined normal range. If the ratio of the low frequency tone to the high frequency tone is within the first predefined normal range, a determination is made not to tune the gas turbine engine. But, if the ratio of the low frequency tone to the high frequency tone is not within the first predefined normal range, a determination is made to tune the gas turbine engine.
Owner:H2 IP UK LTD
Valve controlled high frequency oscillatory ventilation
The present invention provides a breathing apparatus (1) for providing high frequency oscillatory ventilation to a patient (3) by supplying breathing gas to the patient according to an oscillating pressure profile oscillating between a positive pressure and a negative pressure. The breathing apparatus comprises a patient circuit including an inspiratory line (5) and an expiratory line (9). It further comprises an inspiration valve (17) for regulating a flow of pressurised breathing gas into the inspiration line, and a control unit (21) for controlling the inspiration valve. The control unit is operable to cause the oscillating pressure profile by controlling the inspiration valve to oscillate between a top flow position in which the flow of breathing gas through the inspiration valve assumes a top flow value, and a minimum flow position in which the flow through the inspiration valve assumes a minimum flow value.
Owner:MAQUET CRITICAL CARE
Cardiac signal processing apparatus and cardiac signal processing method
ActiveUS8597196B2Eliminate distractionsComponent with highCatheterSensorsBand-pass filterEngineering
A cardiac signal processing apparatus includes: a unit for acquiring, from a heartbeat sensor, cardiac signals relating to heartbeats of a subject; a low-pass filter for allowing passage of those cardiac signals having a first predetermined frequency or lower, among the cardiac signals; higher harmonic noise acquisition unit for acquiring harmonic signals of low-frequency noise by performing high frequency extrapolation on the signals output from the low-pass filter; a high-pass filter for allowing passage of those cardiac signals having a second predetermined frequency or higher, among the cardiac signals; and higher harmonic noise removal unit for removing the harmonic signals of low-frequency noise from the signals output from the high-pass filter. It is thus made possible to remove noise from the cardiac signals and to obtain desirable heartbeat detection characteristics.
Owner:TOYOTA JIDOSHA KK
System and method for integrated high frequency oscillatory ventilation
ActiveUS8402970B2RespiratorsOperating means/releasing devices for valvesHigh frequency oscillatory ventilationEngineering
An integrated ventilation system is presented. The integrated ventilation system includes a high frequency ventilation module configured to be operationally coupled to a ventilation system, where the high frequency ventilation module is configured to aid the ventilation system in performing high frequency ventilation. A method for providing high frequency ventilation via use of a high frequency ventilation module, where the high frequency ventilation module is configured to be operationally coupled to a ventilation system, and where the high frequency ventilation module is configured to aid the ventilation system in performing high frequency ventilation, is presented. The method includes creating a vacuum effect at an outlet port of the ventilation system to aid in active exhalation of gas from a patient.
Owner:GENERAL ELECTRIC CO
Neurally triggered support ventilation during hfo ventilation
ActiveUS20160228661A1Precise and robust wayRespiratorsElectromyographyBreathing gasHigh-frequency ventilation
A ventilation system for providing patient-triggered support ventilation to a spontaneously breathing patient during ongoing HFV ventilation has a pneumatic unit for delivery of breathing gas to the patient in response to an effort to breathe by the patient, a control computer for controlling the delivery of breathing gas by said pneumatic unit, and an oscillator for superimposing high frequency oscillation onto the breathing gas. The system further includes a bioelectric sensor that measures a bioelectric signal indicative of the patient's efforts to breathe, and the control computer is configured to control the delivery of breathing gas in response to the patient's effort to breathe, based on this bioelectric signal. The ventilation system is hence designed for neurally triggered support ventilation during ongoing high frequency ventilation, HFV, which makes the trigger mechanism of the ventilation system more precise and robust compared to trigger mechanisms of known ventilation systems capable of providing support ventilation during ongoing HFV ventilation.
Owner:MAQUET CRITICAL CARE
Visual 3D endoscope capable of guiding tracheal intubation
PendingCN107510432AEliminate distractionsClear visionBronchoscopesTracheal tubesTube intubationEngineering
The invention belongs to the technical field of medical equipment, and discloses a visual 3D endoscope capable of guiding tracheal intubation. The visual 3D endoscope capable of guiding the tracheal intubation is provided with an endoscope body, wherein an exchange tube core guide groove is formed in the back side of the endoscope body, and the exchange tube core guide groove is connected with a base of the 3D endoscope; a sucking and flushing hole is formed in the ventral side of the endoscope body, and the sucking and flushing hole is distributed at the opposite side of the exchange tube core guide groove; two miniature cameras, two light sources and a micro microphone are inlaid on the front end surface of the endoscope body, the two miniature cameras are symmetrically arranged on two sides of the joint of the sucking and flushing hole and the exchange tube core guide groove, the two light sources are symmetrically distributed at the upper parts of the miniature cameras and the lower part of the exchange tube core guide groove, and the miniature microphone is arranged at the joint of the miniature camera on the left side and the sucking and flushing hole. The visual 3D endoscope capable of guiding the tracheal intubation integrates the current mainstream tracheal intubation devices and ideas including the laryngoscope, the visible laryngoscope, the light wand, the bronchofiberscope, the visual tube core, high-frequency ventilation and the like.
Owner:高长胜
Beauty treatment device for face skin treatment
InactiveCN102233156AAutomatic yet gentle beauty treatmentLow costElectrotherapyHigh-frequency ventilationSubcutaneous tissue
The invention relates to a beauty treatment device for face skin treatment, comprising a carrier, provided with a high frequency electrode connected to a high frequency generator and at least one temperature probe for measuring the temperature of the treatment position. The carrier is a mask used for facial positioning, and the high frequency electrode is disposed on the inner side acting point of the mask facing the face. A user only needs to sleeve the mask on the face, and finds at least one high frequency electrode for accurate positioning on the skin requiring beauty treatment. The high frequency electromagnetic energy is effectively transferred into the hypodermics of skin requiring beauty treatment through the high frequency electrode. With the device, users can conduct beauty treatment by themselves, saving cost for beauty treatment.
Owner:VIEMEDIC
Portable high-frequency respirator
The present invention relates to portable high frequency ventilation (HFV). It includes an air compression pump, a power supply unit for driving said air compression pump and a control unit for regulating and controlling air compression pump, in which the air compression pump is a high-frequency one whose operation frequency range is 100-4000 times per minut.
Owner:MACKAY MEMORIAL HOSPITAL
Processing method for unstable signals of electromagnetic flowmeter under conditions of high frequency excitation
ActiveCN108020280AFast stabilizationEasy to useVolume/mass flow by electromagnetic flowmetersInstabilityCurrent consumption
The invention provides a processing method for unstable signals of an electromagnetic flowmeter under conditions of high frequency excitation, which comprises the following steps: an input signal is directly inputted to an analog-to-digital conversion circuit for signal preprocessing; an interference model is constructed, and the characteristic quantity of the dynamic variation of differential interference signals after signal preprocessing is extracted according to the interference model; the differential interference signal is obtained according to the characteristic quantity, and the process of removing the differential interference signal is carried out, and then an output signal of the conducting fluid flow is obtained. The processing method for the unstable signals of the electromagnetic flowmeter under conditions of high frequency excitation has the advantages that the steady speed of currents can be increased and the time for magnetic field excitation can be shortened, therebyreducing current consumption of the device; the using time of battery-powered products can be effectively prolonged; the excitation current in the time for effective signal acquisition can be enhanced, and the signal to noise ratio can be enhanced, thereby solving the problem of the instability of the zero point caused by the introduced interference under conditions of high frequency excitation above 100 Hz.
Owner:CHONGQING CHUANYI AUTOMATION
Medical breathing machine in air duct positive-pressure high-frequency ventilating mode
ActiveCN102178993AImprove unimpededIncrease lung ventilationRespiratorsVibration amplitudePositive pressure
The invention discloses a medical breathing machine in an air duct positive-pressure high-frequency ventilating mode. The medical breathing machine adopts an air duct positive-pressure ventilating mode, a high-frequency pulse pressure wave with adjustable amplitude, frequency and duration is increased in the pressure level of an air duct positive-pressure ventilating mode, and the ventilating modes can be divided into at least seven types, namely single-level positive-pressure high-frequency ventilation, double-level inspiration phase high-frequency ventilation, double-level expiration phase high-frequency ventilation, double-level expiration and inspiration two-phase high-frequency ventilation, proportional ventilation inspiration phase high-frequency ventilation, proportional ventilation expiration phase high-frequency ventilation, and proportional ventilation inspiration phase and expiration phase high-frequency ventilation. By superposing vibration amplitude, vibration frequency and vibration time duration on different treatment pressures in different breathing sections to generate the high-frequency ventilating pressure of the air duct, the smoothness of the air duct and the increase of the pulmonary ventilation in ventilation treatment are achieved, and the blood oxygen concentration and the carbon dioxide concentration are adjusted.
Owner:CURATIVE MEDICAL TECH INC
High-frequency respirator system and ventilation control method
ActiveCN110464951AEasy dischargeRapid air supplyRespiratorsMedical devicesConstant frequencyEngineering
The invention provides a high-frequency respirator system and a ventilation control method, and relates to the technical field of respirators. The ventilation control method of the high-frequency respirator system provide by the invention comprises the following steps: S1, acquiring the input frequency of the high-frequency respirator; and S2, when the input frequency is higher than the set frequency, starting a turbine fan, starting a high-frequency oscillation module, starting an exhalation fan, starting a breathing valve, and performing breathing valve control, wherein the breathing valve control comprises: when a patient inhales, controlling the opening degree of the breathing valve to be reduced, and when the patient exhales, controlling the opening degree of the breathing valve to beincreased. According to different input frequencies, high-frequency ventilation and constant-frequency ventilation are respectively carried out, and ventilation control on a patient is realized through the combined action of the turbine fan and the exhalation fan. In addition, by closing the breathing valve at the time of inhalation and opening the breathing valve at the time of exhalation, the inhalation and exhalation effects of the patient are better.
Owner:NINGBO DAVID MEDICAL DEVICE CO LTD
Depiction method of carbonate rock fracture cavity internal structure
The invention discloses a depiction method of a carbonate rock fracture cavity internal structure. The method comprises steps that based on existing geological knowledge, seismic data corresponding to a fracture cavity is acquired; for the seismic data, frequency spectrum decomposition is employed, and the high frequency information is utilized to depict the internal structure of the fracture cavity.
Owner:CHINA PETROLEUM & CHEM CORP
Device for the electro-surgical sclerosing of body tissues
ActiveCN101027007AReduce output powerSimple and Reliable TreatmentSurgical needlesSurgical instruments for heatingDevice formElectrical impedance
The invention relates to a high-frequency current application device (1), for the thermal sclerosing of body tissue, comprising a high frequency generator (2), to which at least two electrodes (12) are connected, of which at least one electrode is for introduction into body tissue, a measuring and calculation device (7, 9), embodied for the determination of the impedance or the ohmic resistance between the two electrodes between which a therapeutic high frequency current flows and a control device (6), connected to the measuring and calculation device, for changing the output power. The measuring and calculation device forms the first derivative of the time curve for the impedance or ohmic resistance during a high frequency current application. The control device reduces the output power significantly when said time curve derivative exceeds a positive threshold (L1), which is characteristic of an impending tissue desiccation and returns the output power back to the original power when the first derivative exceeds a negative threshold (L2), in the positive direction, which is characteristic for an adequate rehydration of the body tissue.
Owner:CELON MEDICAL INSTR
Intratracheal surgical high-frequency ventilation and gas guide device and method for operating same
PendingCN108273168AEasy to useEasy to operateTracheal tubesLaryngeal MasksHigh-frequency ventilation
Owner:THE FIRST AFFILIATED HOSPITAL OF FUJIAN MEDICAL UNIV
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