WO2018124783A1 - Dispositif et procédé de détermination de pression dans une chambre, pour traitement à l'oxygène haute-pression - Google Patents

Dispositif et procédé de détermination de pression dans une chambre, pour traitement à l'oxygène haute-pression Download PDF

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Publication number
WO2018124783A1
WO2018124783A1 PCT/KR2017/015671 KR2017015671W WO2018124783A1 WO 2018124783 A1 WO2018124783 A1 WO 2018124783A1 KR 2017015671 W KR2017015671 W KR 2017015671W WO 2018124783 A1 WO2018124783 A1 WO 2018124783A1
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WO
WIPO (PCT)
Prior art keywords
pressure
admittance
eardrum
chamber
user
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PCT/KR2017/015671
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English (en)
Korean (ko)
Inventor
신태민
송문
전세훈
김현성
남윤찬
신수연
장유림
윤석호
박종준
Original Assignee
연세대학교 원주산학협력단
(주)아이벡스메디칼시스템즈
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Publication of WO2018124783A1 publication Critical patent/WO2018124783A1/fr

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F11/00—Lifting devices specially adapted for particular uses not otherwise provided for
    • B66F11/04—Lifting devices specially adapted for particular uses not otherwise provided for for movable platforms or cabins, e.g. on vehicles, permitting workmen to place themselves in any desired position for carrying out required operations
    • B66F11/044—Working platforms suspended from booms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
    • A61B5/00—Measuring for diagnostic purposes; Identification of persons
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G10/00—Treatment rooms or enclosures for medical purposes
    • A61G10/02—Treatment rooms or enclosures for medical purposes with artificial climate; with means to maintain a desired pressure, e.g. for germ-free rooms
    • A61G10/023—Rooms for the treatment of patients at over- or under-pressure or at a variable pressure
    • A61G10/026—Rooms for the treatment of patients at over- or under-pressure or at a variable pressure for hyperbaric oxygen therapy
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B66—HOISTING; LIFTING; HAULING
    • B66F—HOISTING, LIFTING, HAULING OR PUSHING, NOT OTHERWISE PROVIDED FOR, e.g. DEVICES WHICH APPLY A LIFTING OR PUSHING FORCE DIRECTLY TO THE SURFACE OF A LOAD
    • B66F17/00—Safety devices, e.g. for limiting or indicating lifting force
    • B66F17/006—Safety devices, e.g. for limiting or indicating lifting force for working platforms
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61G—TRANSPORT, PERSONAL CONVEYANCES, OR ACCOMMODATION SPECIALLY ADAPTED FOR PATIENTS OR DISABLED PERSONS; OPERATING TABLES OR CHAIRS; CHAIRS FOR DENTISTRY; FUNERAL DEVICES
    • A61G2203/00—General characteristics of devices
    • A61G2203/30—General characteristics of devices characterised by sensor means
    • A61G2203/32—General characteristics of devices characterised by sensor means for force

Definitions

  • the present invention relates to an apparatus and a method for determining the pressure in the chamber, and more particularly to a method for determining the pressure that is not overlying the patient's eardrum in an environment where the pressure fluctuates.
  • the tympanic membrane is a thin, transparent silver-white membrane with a thickness of about 0.1 mm and consists of three layers.
  • the tympanic membrane is located at the boundary between the outer ear and the middle ear, and its overall shape is conical, with the pointed tip of the cone pointing toward the inside of the middle ear, which can act as a diaphragm that vibrates the sound waves transmitted through the ear canal.
  • hyperbaric oxygen treatment is a treatment performed by administering oxygen in a closed oxygen chamber at a high pressure of 1 atm or more for a predetermined time, and is generally used for decompression and arterial air embolism of divers, and is also used to treat carbon monoxide.
  • the closed oxygen chamber for hyperbaric oxygen treatment is referred to as a hyperbaric oxygen treatment device or a hyperbaric oxygen chamber.
  • Tympanometry is performed to check the motility and condition of the tympanic membrane.
  • the tympanic state of the patient cannot be identified. Therefore, a method for measuring the tympanic condition of the patient during hyperbaric oxygen treatment is required.
  • An object of the present invention is to provide a device for predicting a tympanic condition of a patient and determining a pressurizable pressure in a high pressure environment in which pressure is constantly changing.
  • an embodiment of the present invention is a device for determining the pressure of the chamber, a speaker for outputting sound of a predetermined frequency band directed to the eardrum of the user inside the chamber, the eardrum of the user Determines the pressure in the chamber based on a microphone for receiving the reflected wave from the microphone, a measuring unit for measuring the admittance in the eardrum, and the measured admittance based on the magnitude of the output sound and the magnitude of the component corresponding to the sound in the reflected wave. It can be provided an apparatus comprising a pressure determining unit to.
  • a device characterized in that it further comprises a tympanum state information generating unit for generating the user's tympanum state information based on the measured admittance and the determined pressure.
  • the tympanum state information includes at least one or more of the degree of warpage of the tympanic membrane, whether the tympanic membrane is currently in a steady state, a pressure range corresponding to the current state of the tympanic membrane, and a degree of danger. Can provide.
  • the tympanic state information generating unit generates the tympanic state information as the normal state of the eardrum when the measured admittance is the maximum admittance, and when the measured admittance is the minimum admittance, the inside and outside of the tympanic membrane.
  • the pressure difference in the E is out of a preset range, it is possible to provide a device characterized in that the state of the tympanic membrane to generate a state of the tympanic state is dangerous.
  • the measurement unit may measure the second admittance corresponding to the determined pressure
  • the pressure determiner may provide an apparatus, characterized in that for updating the pressure based on the admittance and the second admittance.
  • the measurement unit measures the second admittance in the tympanic membrane while the pressure in the chamber is pressurized based on the determined pressure, the pressure determining unit is measured when the measured second admittance has a maximum value, It is possible to provide a device characterized in that the pressure is updated by adding the pressure corresponding to the second admittance to the pressure corresponding to the admittance.
  • a device characterized in that it further comprises a pressure regulator for adjusting the pressure in the chamber based on the determined pressure.
  • the pressure is a pressurized pressure that can be pressurized to the user
  • the pressure determiner determines the current pressure in the chamber as the pressurized pressure when the measured admittance is the maximum
  • the pressure adjuster is measured by the eardrum
  • a device further comprising a guide information generating unit for generating guide information for inducing the maximum admittance based on the measured admittance and the determined pressure.
  • the pressure determiner is based on the control command received from the external device located outside in response to the transmitted admittance It is possible to provide an apparatus characterized by determining.
  • a speaker for directing the sound of a predetermined frequency band to the user's eardrum inside the chamber, a microphone for receiving the reflected wave reflected from the eardrum of the user, the output
  • a measurement unit for measuring the admittance in the user's eardrum based on the magnitude of the measured sound and the component corresponding to the sound among the reflected waves
  • a pressure determination unit for determining the pressure in the chamber, the measured admittance and the determined pressure
  • the apparatus may include a tympanum state information generating unit for generating tympanic state information.
  • the method for determining the pressure of the chamber to direct the sound of a predetermined frequency band to the user's eardrum inside the chamber receiving the reflected wave reflected from the user's eardrum, Measuring the admittance in the eardrum of the user based on the magnitude of the sound and the magnitude of the component corresponding to the sound in the reflected wave, and determining the pressure in the chamber based on the measured admittance can do.
  • the patient's eardrum can be predicted even when the volume of the ear canal changes due to the movement of the patient during the time from the pressure change point to the start point of maintaining the pressure equilibrium.
  • the difference between the pressure and the pressure inside the body can prevent barotrauma to the patient's eardrum.
  • FIG. 1 is a diagram illustrating an overall system including an apparatus for determining the pressure of a chamber according to an embodiment of the present invention.
  • FIG. 2 is a block diagram of an apparatus according to an embodiment of the present invention.
  • FIG. 3 is a diagram illustrating a process of measuring admittance and determining pressure in a tympanic membrane in accordance with an embodiment of the present invention.
  • FIG. 4 is a diagram illustrating a process of extracting a component corresponding to sound from reflected waves according to an embodiment of the present invention.
  • 5A to 5C are views illustrating a process of determining the pressure in a chamber according to an embodiment of the present invention.
  • FIG. 6 is a flowchart illustrating a method of determining the pressure of a chamber according to an embodiment of the present invention.
  • the apparatus may include a pressure determining device 10 and an external device 20 including a computer device, a mobile phone, and the like, connected to the pressure determining device 10 through a network 30.
  • the network 30 refers to a connection structure capable of exchanging information between nodes such as terminals and servers, and may include wireless communication and wired communication.
  • the wireless communication may use at least one of, for example, LTE, LTE-A, CDMA, WCDMA, UMTS, WiBro, or GSM as a cellular communication protocol.
  • the wireless communication may include, for example, short-range communication.
  • the short range communication may include, for example, at least one of Wi-Fi, Bluetooth, Zigbee, RF (Radio Frequancy) communication, near field communication (NFC), global positioning system (GPS), and the like. .
  • the wired communication may include, for example, at least one of a universal serial bus (USB), a high definition multimedia interface (HDMI), a reduced standard 232 (RS-232), a plain old telephone service (POTS), and the like.
  • the network 300 may include a telecommunications network, for example, at least one of a computer network (eg, LAN or WAN), the Internet, or a telephone network.
  • the external device 20 is a terminal that can receive or store card information on an electronic card, and is a smartphone, a tablet personal computer, a mobile phone, a video phone, an e-book.
  • E-book readers desktop PCs, laptop PCs, netbook computers, workstations, servers, personal digital assistants, portable multimedia players (PMPs) , MP3 player, mobile medical device, camera, or wearable device (e.g. smart glasses, headmounted-device (HMD)), electronic clothing, electronic bracelets, electronic necklaces, electronic accessories ), An electronic tattoo, a smart mirror, or a smart watch), and may include a separate control device that can control the pressure determining device 10 from the outside, but is not limited thereto. It is not.
  • the pressure determination device 10 outputs a sound of a predetermined frequency band directed to the user's eardrum inside the chamber, receives the reflected wave reflected from the user's eardrum, and outputs the sound from the user's eardrum based on the output sound and the magnitude of the reflected wave. By measuring the admittance of, the pressure in the chamber can be determined.
  • the pressure determining device 10 has an entrance on the side, and can partition the inside of the device 10 so as to separate the device 10 into one or more sealed spaces, and can be separated into one or more airtight spaces in the diaphragm. have.
  • the pressure determining device 10 may include an oxygen supply device installed in one or more sealed spaces to supply high pressure oxygen, and may further include a power supply device supplying power to the oxygen supply device. .
  • the pressure determining device 10 may predict the pressure equilibrium state by measuring the volume of the ear canal of the patient in a high pressure environment and analyzing the admittance of the tympanic membrane for a user or a patient in the chamber based on the basic theory of tympanic mobility test. The pressure to reach pressure equilibrium can be determined.
  • the tympanic motility test is an acoustic emission measurement and a test for measuring the sound absorption rate of the tympanic membrane.
  • the difference between the internal pressure and the external pressure can be estimated based on the eardrum based on the test result and the internal pressure of the chamber.
  • the state where the admittance is maximum may mean that the internal pressure and the external pressure are the same as the eardrum has the maximum absorption rate.
  • the air is blown through the eustachian tube to secure the compressed air volume in the middle ear, thereby obtaining the compressed air volume in the middle ear, thereby achieving pressure equalization of the middle ear.
  • the eardrum When the pressure in the pressure determining device 10 is pressurized, the eardrum may be recessed toward the middle ear cavity, and when the pressure is reduced, the eardrum may expand in the ear canal direction.
  • the pressure determining device 10 may include a speaker 101, a microphone 102, a measuring unit 103, and a pressure determining unit 104.
  • the configuration of the pressure determining device 10 is not limited to those disclosed above.
  • the pressure determining device 10 may further include a tympanic state information generating unit 105, a pressure adjusting unit 106, a guide information generating unit (not shown), and a communication unit (not shown).
  • the speaker 101 may direct sound of a predetermined frequency band to the eardrum of the user inside the chamber and output the sound.
  • the speaker 101 may direct and output a single sound of 220 Hz to 230 Hz toward the eardrum.
  • the speaker 101 may generate a single sound of 226 Hz directed toward the eardrum of the user in the chamber through a digital to analog converter (DAC).
  • DAC digital to analog converter
  • the sound transmitted from the speaker 101 may have various features. As a characteristic irrespective of the frequency of the sound transmitted from the speaker 101, there may be friction generated by the friction between the isogol connecting part, the force of the air particles striking the middle ear structure, the mechanical shape of the cochlea tube, and the like. As a characteristic related to the frequency of the sound transmitted from the speaker 101, there are rigidity, elasticity, and the like, which correlate with flexibility, such as a tympanic membrane and isogol.
  • the microphone 102 may receive the reflected wave reflected from the eardrum of the user. As an example, the microphone 102 may receive the reflected wave returned by the reflected eardrum by the pressure.
  • the measurement unit 103 may measure an admittance in the eardrum of the user based on the magnitude of the output sound and the magnitude of a component corresponding to the sound among the reflected waves. At this time, the measurement unit 103 passes the received reflected wave through a filter having a predetermined frequency pass band, removes noise included in the received reflected wave by Fourier fast transform (FFT), and removes a component corresponding to sound from the reflected wave. It can be measured. For example, the measuring unit 103 may perform an analog to digital converter (ADC) on the reflected wave received through the microphone 102 at a sampling rate of 7.232 kHz.
  • ADC analog to digital converter
  • the sampling rate is generally 452Hz according to the Nyquist theory, which can be reproduced completely without loss of information in the sampling process with proper sampling interval of limited band frequency, but only 226Hz component is extracted through Fourier fast conversion.
  • the measurement unit 103 may take a 2nd order IIR peak filter having a passband of 226Hz to remove noise except for the signal of the 226Hz band, and then apply the Fourier fast transform to the filtered signal to receive the microphone 102.
  • the component corresponding to the sound output through the speaker 101 among the reflected waves can be measured.
  • the measurement unit 103 When the measurement unit 103 measures the admittance of the eardrum using sound in the 226 Hz band at the entrance to the ear canal, the measurement unit 103 may include both the volume of the ear canal and the admittance information of the eardrum, and the measurement unit 103 may be measured by the user's eardrum. In measuring the admittance at, it may be measured using the maximum value of the sound in the 226 Hz band generated through the speaker 101 and the maximum value of the component corresponding to the sound among the reflected waves.
  • the total admittance TA (Total Admittance) including the volume and admittance of the ear canal can be obtained through a speaker and a microphone as shown in Equation 1 above.
  • the human middle ear has a phase difference of approximately 90 degrees between the sound output from the speaker 101 and the reflected wave received from the microphone 102 at 226 Hz, and the real value converges to zero. Therefore, the admittance Y is matched 1: 1 with the acoustic susceptance B and can be expressed by Equation 2 below.
  • the total admittance that can be measured through the microphone 101 and the speaker 102 may be expressed as the sum of the ear canal volume (ECV) and the admittance of the tympanic membrane (TMA: Tympanic Membrane Admittance).
  • ECV ear canal volume
  • TMA Tympanic Membrane Admittance
  • the eardrum expands to the maximum and loses the ability to absorb sound.
  • the admittance of the eardrum converges to zero, so there is no pressure difference between the inside and outside of the eardrum. If the tympanic membrane's admittance has a maximum value, it can be said that the tympanic membrane is at pressure equilibrium.
  • the admittance of the tympanic membrane becomes zero and the total admittance measured at this time may represent only the ear canal volume.
  • the ear canal volume can be expressed as in Equation 3. Where p is the air density, c is the speed of sound waves, f is the frequency of sound, and v is the volume of enclosure. If the atmospheric pressure and temperature is 20 degrees, and using a frequency of 226 hz, the ear canal volume can be obtained as shown in Equation 4 below.
  • the measurement unit 103 may measure the admittance in the eardrum of the user based on the magnitude of the output sound and the magnitude of a component corresponding to the sound among the reflected waves.
  • the measurement unit 103 may estimate the middle ear pressure based on the eardrum of the user using an admittance of the eardrum and an external pressure such as a chamber pressure applied to the outside based on the eardrum, thereby measuring the pressure difference.
  • You may.
  • the measured pressure difference exceeds 800 daPa, early symptoms of barotrauma such as pain may occur, and when reaching 1200 daPa, it is impossible to open and close the eustachian tube by the patient's own effort, Pressure equalization of the internal pressure will not be achieved. If this pressure continues to increase, physical damage such as severe pain, rupture, perforation, or hearing loss can occur.
  • the pressure determiner 104 may determine the pressure in the chamber based on the measured admittance. Taking the operation of the pressure determiner 104 as an example through FIG. 3, FIG. 3 is a diagram illustrating a process of measuring admittance in the eardrum and determining a pressure according to an embodiment of the present invention.
  • the user may enter the chamber and pressurize the chamber pressure 302 at 200 daPa based on the atmospheric pressure (S301).
  • the measurement unit 103 measures that the admittance 301 of the tympanic membrane gradually converges to zero, and then induces pressure equilibrium through the user's effort. This gradually increases to reach a pressure equilibrium state S302 where the internal pressure 303 and the external pressure 302 are equal, and at this time, the measurement unit 103 can measure the maximum value of the admittance of the tympanic membrane.
  • the chamber pressure 303 is pressurized at 200 daPa (S303), the pressure becomes unbalanced, and the admittance of the eardrum converges to zero again.
  • the chamber pressure 303 is reduced to 400 daPa (S304)
  • the external pressure 302 becomes As it decreases, the pressure equilibrium gradually increases, and the tympanic admittance becomes the maximum value.
  • the chamber pressure 302 becomes lower than the internal pressure 303 as the decompression continues, the pressure becomes unbalanced again and the admittance of the tympanic membrane becomes zero. Converges to. That is, it can be estimated that the pressure is in equilibrium when the difference 304 between the chamber pressure 302 and the internal pressure 303 is zero, or when the admittance of the tympanic membrane reaches a maximum value.
  • the measurement unit 103 may continuously measure the admittance of the user's eardrum to determine whether the user is currently in an equilibrium state, and the pressure determination unit 104 ) May determine the current pressure at the time when the user's admittance becomes the maximum value as the pressurized pressure that can be pressed to the user in the chamber.
  • the admittance 301 measured by the measuring unit 103 gradually hunts to zero, and according to the user's effort, the internal pressure 303 increases.
  • the admittance 301 measured by the measuring unit 103 has a maximum value.
  • the pressure determiner 104 may determine the maximum value of the admittance 301 as a pressurized pressure capable of pressing 200 daPa, which is the pressure at the time point, to the user.
  • the pressure balance means that the external pressure in the tympanic membrane is the same, and the admittance measured by the measuring unit 103 may have a maximum value when the external pressure in the tympanic membrane is the same. Therefore, the pressure balance, the maximum admittance and the maximum value of the admittance can be used interchangeably, and the pressure determination unit 104 can determine the pressure at the time when the pressure equilibrium is achieved as the pressure in the chamber, and the determined pressure can be pressurized to the user. May be pressurized pressure.
  • the elastic force of the tympanic membrane indicates the ability to absorb sound. At the point where the admittance converges to zero, the elastic force is the lowest and the sound absorption of the tympanic membrane is low. At this time, the tympanic membrane is tense and the reflection is increased, and the ear is bruised due to the pressure difference between the inside and the outside of the middle ear, and the sound is hard to be heard.
  • the elastic force of the eardrum is the highest at the point where the admittance is maximum, and the sound absorption of the eardrum is high. This is the best environment for transmitting sound energy, and the eardrum loosens, resulting in less reflection and increased absorption. This is when the external auditory meatus and middle ear pressure are equal, and the internal pressure and external pressure are the same point of time with respect to the eardrum.
  • the measuring unit 103 measures the admittance in the user's eardrum based on the magnitude of the output sound and the magnitude of the component corresponding to the sound among the reflected waves, and the pressure determining unit 104 measures the pressure in the chamber based on the measured admittance. Can be determined.
  • the pressure is a pressure that can be pressurized to the user, it means a pressure that can reach the pressure equilibrium by the user without generating a trauma directly to the user's eardrum because it is pressurizable pressure.
  • the tympanic state information generating unit 105 may generate the tympanic state information of the user based on the measured admittance and the determined pressure.
  • the tympanic condition information may include, but is not limited to, information about the flexural information of the tympanic membrane, whether the tympanic membrane is currently in a normal state, the pressure range corresponding to the current state of the tympanic membrane, the degree of danger, the level of danger, and whether the pressure is in equilibrium It may further include various information related to the condition of the tympanic membrane.
  • the tympanic state information generating unit 105 determines that the state of the tympanic membrane is in a normal state and generates a tympanic state information, and measures the measuring unit ( If the admittance measured at 103 is the minimum admittance converged to zero, the pressure is in an unbalanced state, and the eardrum state information may be generated by determining that the current state of the eardrum is a dangerous state.
  • the measurement unit 103 may measure the second admittance corresponding to the determined pressure, but the pressure determiner 104 may update the pressure based on the admittance and the second admittance.
  • the measuring unit 103 measures the second admittance in the middle ear film while the pressure in the chamber is pressurized based on the determined pressure, but the pressure determining unit 104 measures the admittance measured when the measured second admittance has the maximum value.
  • the pressure may be updated by adding a pressure corresponding to the second admittance to a pressure corresponding to.
  • the pressure regulator 106 may adjust the pressure in the chamber based on the determined pressure.
  • the pressure determiner 104 may determine the current pressure in the chamber as the pressurized pressure, and when the measured admittance is the minimum, the eardrum state information generator ( 105 may generate the eardrum state information indicating that the user's eardrum state is dangerous, and the pressure controller 106 may reduce the pressure in consideration of the user's eardrum state when the measured admittance is minimum.
  • FIGS. 5A to 5C are views illustrating a process of determining the pressure in a chamber according to an embodiment of the present invention.
  • the embodiments described with reference to FIGS. 5A to 5C illustrate only one example for aiding an understanding of various embodiments of the present disclosure, and the present invention is not limited to the description of FIGS. 5A to 5C. It is apparent that various other embodiments may exist.
  • the pressure determining device 10 may pressurize to continuously monitor the eardrum state of the patient.
  • the pressurization range can be selected according to the chamber pressure pressurization limit point and the barotrauma generation point according to the pressure difference on the basis of the pressure equilibrium time point, and the measuring unit 103 pressurizes a predetermined range of pressure from the pressure equilibrium point of time. By continuously measuring the admittance, the presence or absence of pressure equilibrium can be confirmed.
  • the pressure determiner 104 may update the pressurizable pressure.
  • the initial pressurizable pressure was 800 daPa
  • the internal pressure 303 of the patient increased when the pressure became 600 daPa during the pressurization of the chamber pressure 302 through the pressure adjusting unit 106, so that the pressure difference 304 became zero.
  • the pressure determining unit 104 updates the pressurized pressure at the time point at which the pressure can be observed to be updated to 1400 daPa ( S502).
  • the guidance information generation unit (not shown) for generating guidance information for inducing the maximum admittance based on the measured admittance and the determined pressure is guided to guide the patient to balance the pressure through the guidance information for a predetermined time In the case of waiting (S503), and if the pressure balance is made within a predetermined time, it is possible to continue the pressurization after updating the pressable pressure (S504).
  • the generated guide information may be voice guidance and may be generated through various methods such as an image and an image.
  • the chamber internal pressure 302 may be reduced.
  • the measurement unit 103 may know that the pressure difference 304 is about 200 daPa when the admittance of the tympanic membrane increases when the pressure inside the chamber is decompressed, and the pressure equilibrium is performed when the pressure difference 304 becomes zero. It can be measured.
  • the measuring unit 103 continuously measures the admittance 301 in the tympanic membrane, and the pressure determined by the pressure determining unit 104 is 800 daPa, and the chamber pressure (
  • the pressure determining unit measures the maximum admittance in the measuring unit 103 at 800 daPa which is a predetermined pressure.
  • the pressure in the chamber can be determined as 1400 daPa plus 600 daPa at. In this case, the pressure may be a pressurizable pressure pressurizable to the user.
  • the pressure determining unit 104 may determine the pressure in the chamber and measure while the pressure in the chamber changes.
  • the pressure determiner 104 may update the predetermined pressure.
  • the present invention may further include a communication unit (not shown) for transmitting the measured admittance to an external device located outside
  • the pressure determiner 104 is a control received from the external device in response to the transmitted admittance
  • the pressure can be determined based on the command.
  • the communication unit may transmit the admittance measured by the measuring unit 103 to a computer located outside, and the pressure determiner 104 may determine the pressure based on a control command received from the computer located outside.
  • the pressure adjusting unit 106 may adjust the pressure based on the control command received from the computer.
  • the device 10 for determining the pressure can be applied only when there is no abnormality in the audiometer, and when the stiffness of the osseous bone is increased, the As-type tympanic motion having a small difference between the conduction degree at atmospheric pressure and the conduction degree under pressure is obtained.
  • the pressure determining device 10 includes a speaker for directing and outputting sound of a predetermined frequency band to the eardrum, a microphone for receiving the reflected wave reflected from the eardrum of the user, the magnitude of the output sound and Generates the eardrum status information of the user based on the measurement unit for measuring the admittance in the eardrum of the user based on the magnitude of the component corresponding to the sound of the reflected wave, the pressure determination unit for determining the pressure in the chamber and the measured admittance and the determined pressure
  • the eardrum state information generating unit may be included.
  • FIG. 4 is a diagram illustrating a process of extracting a component corresponding to a sound from reflected waves according to an embodiment of the present invention.
  • a predetermined frequency band is passed through a speaker in step S402.
  • the sound having the direction can be directed to the eardrum, and in step S403, the reflected wave reflected from the eardrum of the user can be received through the microphone.
  • the sound signal is sampled using the reflected wave received in step S404 in a predetermined frequency band, and in step S405, a 2nd order IIR filter is taken to detect a signal corresponding to the sound among the reflected waves.
  • a Fourier fast transform may be performed to detect a signal corresponding to the sound in the reflected wave, and the admittance may be measured based on the magnitude of the sound output in step S407 and the magnitude of the component corresponding to the sound in the reflected wave. Thereafter, the admittance information measured in step S408 may be transmitted to the external device.
  • the process of extracting a component corresponding to the sound from the reflected wave described in FIG. 4 is only one of various embodiments of the present disclosure, and is not limited thereto.
  • FIG. 6 is a flowchart illustrating a method of determining the pressure of a chamber according to an embodiment of the present invention.
  • the method of determining the pressure of the chamber according to FIG. 6 describes the contents processed in each part of the pressure determining device 10 described with reference to FIGS. 1 to 5. Therefore, even if not described below, the detailed description is omitted because it can be included or inferred in the operation description of the pressure determining device described with reference to FIGS.
  • the pressure determination apparatus 10 outputs sound of a predetermined frequency band to a user's eardrum inside the chamber, and receives a reflected wave reflected from the user's eardrum in step S602.
  • the admittance in the tympanic membrane is measured based on the magnitude of the sound output in step S603 and the magnitude of the component corresponding to the sound in the reflected wave, and the pressure in the chamber can be determined based on the admittance measured in step S604.

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Abstract

Dispositif pour déterminer une pression dans une chambre comprenant : un haut-parleur pour diriger et délivrer un son d'une bande de fréquence prédéfinie à un tympan d'un utilisateur à l'intérieur d'une chambre ; un microphone pour recevoir une onde réfléchie qui est réfléchie par le tympan d'un utilisateur ; une unité de mesure pour mesurer l'admittance du tympan d'un utilisateur sur la base de la taille d'un son de sortie et de la taille d'un composant correspondant à un son dans une onde réfléchie ; et une unité de détermination de pression pour déterminer une pression dans une chambre sur la base de l'admittance mesurée.
PCT/KR2017/015671 2017-01-02 2017-12-28 Dispositif et procédé de détermination de pression dans une chambre, pour traitement à l'oxygène haute-pression WO2018124783A1 (fr)

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KR1020170000423A KR101831814B1 (ko) 2017-01-02 2017-01-02 고압산소 치료를 위한 챔버 내 압력을 결정하는 장치 및 방법

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KR102119949B1 (ko) * 2018-07-23 2020-06-16 (주)아이벡스메디칼시스템즈 플랫폼 기반 이동식 원격관리 고압산소치료시스템
KR102543412B1 (ko) * 2020-12-14 2023-06-14 (주)아이벡스메디칼시스템즈 외이와 중이간 압력 평형 상태를 감지하는 고압산소챔버의 자동 압력 제어 방법
KR102543402B1 (ko) * 2020-12-14 2023-06-14 (주)아이벡스메디칼시스템즈 바로트라우마를 방지하는 고압산소챔버
KR102543403B1 (ko) * 2020-12-14 2023-06-14 (주)아이벡스메디칼시스템즈 고압산소챔버의 자동 압력 제어 방법

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