WO2012114004A1 - Appareil de suivi de l'observance d'un traitement de l'apnée obstructive du sommeil - Google Patents
Appareil de suivi de l'observance d'un traitement de l'apnée obstructive du sommeil Download PDFInfo
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- WO2012114004A1 WO2012114004A1 PCT/FR2012/050072 FR2012050072W WO2012114004A1 WO 2012114004 A1 WO2012114004 A1 WO 2012114004A1 FR 2012050072 W FR2012050072 W FR 2012050072W WO 2012114004 A1 WO2012114004 A1 WO 2012114004A1
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- venturi
- inlet
- pressure
- gas
- outlet
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/06—Respiratory or anaesthetic masks
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/087—Measuring breath flow
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/08—Detecting, measuring or recording devices for evaluating the respiratory organs
- A61B5/097—Devices for facilitating collection of breath or for directing breath into or through measuring devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4806—Sleep evaluation
- A61B5/4818—Sleep apnoea
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61B—DIAGNOSIS; SURGERY; IDENTIFICATION
- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/48—Other medical applications
- A61B5/4833—Assessment of subject's compliance to treatment
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0051—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes with alarm devices
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0057—Pumps therefor
- A61M16/0063—Compressors
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/021—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes operated by electrical means
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
- G01F1/05—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects
- G01F1/34—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure
- G01F1/36—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using mechanical effects by measuring pressure or differential pressure the pressure or differential pressure being created by the use of flow constriction
- G01F1/40—Details of construction of the flow constriction devices
- G01F1/44—Venturi tubes
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/08—Bellows; Connecting tubes ; Water traps; Patient circuits
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/0027—Accessories therefor, e.g. sensors, vibrators, negative pressure pressure meter
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M16/00—Devices for influencing the respiratory system of patients by gas treatment, e.g. mouth-to-mouth respiration; Tracheal tubes
- A61M16/0003—Accessories therefor, e.g. sensors, vibrators, negative pressure
- A61M2016/003—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter
- A61M2016/0033—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical
- A61M2016/0039—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the inspiratory circuit
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/35—Communication
- A61M2205/3546—Range
- A61M2205/3553—Range remote, e.g. between patient's home and doctor's office
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/35—Communication
- A61M2205/3576—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver
- A61M2205/3592—Communication with non implanted data transmission devices, e.g. using external transmitter or receiver using telemetric means, e.g. radio or optical transmission
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/50—General characteristics of the apparatus with microprocessors or computers
- A61M2205/52—General characteristics of the apparatus with microprocessors or computers with memories providing a history of measured variating parameters of apparatus or patient
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M2205/00—General characteristics of the apparatus
- A61M2205/82—Internal energy supply devices
- A61M2205/8206—Internal energy supply devices battery-operated
Definitions
- the present invention relates to an apparatus for monitoring the observance of a treatment of obstructive sleep apnea.
- Obstructive sleep apnea syndrome is a common disorder affecting millions of adults and children, characterized by upper airway obstruction, which can cause snoring or stopping of breathing during sleep.
- the obstruction that occurs during sleep has two main causes that are lack of muscle tone and heaviness.
- the excessive presence of tissues in the upper airways and anatomical deformities exacerbate the consequences of these factors.
- the body relaxes and muscle tissue, such as tongue and soft palate, for example, lose their rigidity.
- the effect of gravity pushes these tissues towards the back of the throat, which closes the upper airways.
- each obstruction deprives the body of oxygen and therefore forces it to keep carbon dioxide (C0 2 ) that it would expel normally during the expiration phases. It follows that the gas balance of the blood is disrupted and the body is exposed to a "toxic" environment. When the body "signals” that it needs more oxygen, the brain wakes up the sleeper, breathing resumes and the person goes back to the next obstruction.
- These obstructions also cause an increase in heart rate and blood pressure, and eventually weaken the body's "automatic” response capacity, resulting in more and more severe apneas and hypopneas.
- Symptoms of sleep deprivation in people with OSA include excessive daytime sleepiness, lack of concentration, poor memory, and even depressive mood.
- High blood pressure and low blood oxygen levels are common symptoms for people with sleep apnea, but these are difficult symptoms to detect.
- There are other more easily identified symptoms such as daytime sleepiness, snoring, apnea or irregular breathing during sleep, loss of concentration.
- Effective treatment of OSA involves applying positive air pressure to the patient's airways. The air pressure acts as an "air cushion" that keeps the upper airways open and prevents apnea.
- a CPAP Continuous Positive Airway Pressure
- CPAP type device which delivers slightly pressurized air to the patient's airways via a pipe.
- flexible called a patient circuit
- a respiratory mask usually a nasal or facial mask.
- CPAP treatment is an effective treatment for OSAS patients if its application is well followed. It can then lead to a clear improvement in the quality of life of the patient. On the other hand, the effects of the treatment are negligible, or even nil, if the patient does not observe his treatment for at least 4 hours per night.
- Knowing the patient's compliance, ie measuring the actual time during which they are following their treatment is therefore essential. Similarly, knowing in real time the effectiveness of treatment is a valuable aid to adjust the prescription treatment by the attending physician.
- Document WO-A-2009136101 discloses a device for monitoring the observance of an obstructive sleep apnea treatment comprising an air flow sensor circulating in the patient circuit.
- WO-A-2011/067300 proposes an apparatus for monitoring a respiratory parameter of a patient comprising a convergent / divergent device and a pressure measurement system making it possible to measure the pressure between two portions of said convergent / divergent device having different sections.
- a similar apparatus is described in US-A-2004/0167419.
- the document EP-A-2017586 teaches a monitoring device for CPAP type breathing apparatus comprising a pressure measurement system for measuring the pressure in a duct conveying air under pressure, which duct passes through said device.
- the present invention aims to improve the devices for monitoring the compliance of an oxygen therapy treatment incorporating a venturi so as to allow a measurement as as accurate and sensible as possible of the gas flow by minimizing the pressure drop resulting from the passage of the gas into the venturi.
- the solution of the present invention thus relates to a device for monitoring the observance of a treatment of obstructive sleep apnea comprising a gas passage and a venturi having a cylindrical inlet and outlet, said venturi being arranged axially in said gas passage, a first pressure sensor and a second pressure sensor, characterized in that the inlet and the outlet of the venturi have diameters D1 between 10 and 25 mm, and the venturi comprises, arranged successively between said inlet and outlet, a convergent portion in the shape of an arc of a circle, a cylindrical neck of diameter less than the diameter D1 of the inlet, and a diverging portion characterized by an angle of divergence of between 5 ° and 15 °, and in which the diameter D2 of the neck of the venturi is between 5 and 15 mm, and the length L2 of the neck of the venturi is between 3 and 12 mm.
- the venturi of the invention makes it possible to achieve an accurate and reliable measurement of the flow flowing in the gas passage. Indeed, knowing that the gas flow rate is proportional to the root of the gas pressure drop between the inlet and the neck of the vacuum device, thanks to the venturi of the invention and its particular geometry, the pressure drop between the Venturi inlet (sensor) and the Venturi neck is sufficient to obtain a flow measurement accurate enough to detect respiratory events in the patient but, conversely, low enough not to affect the treatment of the patient, that is, no more than 0.2 cm H 2 0 of output pressure loss for a normal use rate of about 70 1 / min.
- the venturi is designed to obtain a pressure loss of less than 80 Pa for the flow range in question, thanks to its particular geometry, especially the selection of the diameter D2 of the neck between 5 and 15 mm and its length. L2 between 3 and 12 mm, can limit the pressure drop in the patient circuit and thus minimize the impact on the treatment of the patient while maintaining a sufficient sensitivity to allow the measurement of compliance with this treatment as well as the detection of residual respiratory events.
- venturi associated with the pressure sensors allows both to obtain a better sensitivity of detection of respiratory events and to minimize the disturbance of the treatment.
- the venturi of the invention is designed to limit the pressure loss of the gas between said inlet and outlet, that is to say so as to have a loss of pressure, between its inlet and its outlet, less than 100. Pa for a gas flow in the passage between 110 and 150 liters per minute. Preferably, this pressure loss is less than 80 Pa.
- the venturi is of the nozzle type. This geometry of the venturi is in accordance with the aforementioned ISO 5167-3 standard, and has the advantage of allowing a low pressure loss of the gas while ensuring a good stability of the gas flow.
- the apparatus according to the invention may comprise one or more of the following characteristics:
- the inlet and outlet have an identical diameter of between 13 and 20 mm, preferably between 16 and 18 mm.
- the inlet and the outlet are of cylindrical shape and have diameters D1 identical, preferably between 16 and 18 mm.
- the diameter D1 is adapted to the output diameter of the air generator of the CPAP treatment apparatus. More preferably, the diameter D1 of the inlet of the venturi is equal to about 17.3 mm.
- the venturi comprises a convergent portion having a profile formed by two successive arcs of circles
- the angle of divergence a is less than or equal to 12 °, preferably less than or equal to 10 °, advantageously equal to approximately 8 °.
- the diameter D 2 of the neck of the venturi is between 7 and 13 mm, preferably between 9 and 11 mm, advantageously equal to about 10 mm.
- the choice of the diameter of the neck and the angle of divergence allows a good compromise between the decrease of the pressure loss in the venturi and the increase of its sensitivity of detection.
- the length L2 of the neck is between 5 and 10 mm, preferably of the order of 7 to 8 mm, in particular equal to about 7.5 mm.
- the venturi comprises a convergent portion having a profile formed by a first arc of first radius R1 and a second arc of circle of second radius R2 in which the said first and second radii are less than 10 mm, preferably smaller than at 5 mm.
- the venturi has a total length of between 90 and 100 mm.
- a first pressure sensor positioned at the inlet of the venturi for measuring the pressure of the gas at the inlet of the venturi; and a second pressure sensor positioned at the neck of the venturi to measure the pressure of the gas at the neck of the venturi.
- first additional pressure sensor provided at the inlet of the gas passage and measuring the absolute pressure of the gas at the connection with the air generator of the PPC treatment device and / or a second sensor of additional pressure provided at the outlet of the gas passage and measuring the absolute pressure at the connection with the air duct bringing air to the mask of the patient.
- processing means able to process the measured flow rate and pressure values in order to deduce therefrom at least one processing time datum and at least one treatment efficiency datum.
- the processing means may comprise means for correcting possible measurement errors due, for example, to variations in temperature and / or pressure and / or humidity in the air.
- data storage means arranged to store at least one of said data.
- transmission means arranged to transmit at least one of said data to a remote server.
- This remote server is in particular located in the care center in which the patient is followed or at a service provider allowing remote access from the attending physician to the server. The attending physician thus has in real time patient compliance data.
- the data storage means comprise at least one memory chip or a memory card, preferably pluggable, for example an SD card or the like.
- the transmission means comprise a wireless transmitter system, in particular of the radio frequency, bluetooth, Zigbee, Wii, GSM or GPRS type, and an antenna for ensuring a wireless transmission of data adapted to the type of transmitter and inserted in The box.
- the radio frequency transmitter system includes a GSM or GPRS modem integrated or external to the housing.
- the user further comprises one or more indicators, such as colored LEDs, for example red and green, providing the user with information relating to the effectiveness of the treatment.
- indicators such as colored LEDs, for example red and green
- the venturi is arranged to have a differential pressure useful about 6 times greater than the pressure loss of the gas between the inlet and the outlet of said venturi. This ratio between the useful differential pressure and the pressure loss of the gas ensures a good detection sensitivity of the breathing events of the venturi.
- the invention also relates to a sleep apnea treatment installation comprising a pressurized gas source connected to a breathing mask via a gas conduit, characterized in that it comprises an apparatus according to the invention. invention, arranged between said gas source and said breathing mask.
- the pressurized gas source is a CPAP or BiPAP type device.
- FIG. 1 is a block diagram illustrating the structure of an apparatus for monitoring compliance according to one embodiment of the invention
- FIG. 2 is a block diagram illustrating the implementation of the device for monitoring the observance of FIG. 1;
- FIG. 3 is a diagram illustrating the geometry of the venturi according to one embodiment of the invention.
- a tracking device 2, 4 of the observance of a treatment of obstructive sleep apnea (OSA) according to the present invention is formed of a casing 4 connected to the path of the gas.
- respiratory typically pressurized air, that is to say on the patient circuit 30 connecting an AOS treatment apparatus 6 to the respiratory mask 8, generally nasal, equipping a patient to be treated.
- the pressure of the air delivered by the treatment apparatus 6 is a relative pressure prescribed by the physician and between 4 and 20 cm H 2 0. This pressure is regulated by an air generator of the treatment apparatus 6 It corresponds substantially to the pressure in the mask 8 connected to the patient's nose at the pressure drop close in the patient circuit.
- connection of the tracking device 4 to the patient circuit of the treatment apparatus 6 is preferably carried out by means of flexible tubes with conventional tips, for example tips having a diameter of 22 mm and conforming to the ISO 5356 standard. 1.
- the housing 4 comprises an internal gas passage 10 with an inlet 12 and an outlet 14 through which the gas discharged by the AOS treatment apparatus 6 passes before being sent to the patient.
- a venturi 16 is arranged in the housing 4 and connected to the passage 10 so as to allow a measurement of the flow rate of the gas flowing inside said passage 10, that is to say between the inlet 12 and the outlet 14 of the passage 10.
- This gas flow is in particular between 0 and 130 liters per minute. Its walls are preferably smooth.
- the venturi 16 comprises two pressure sensors 101, 102.
- the difference in the pressures measured by the sensors 101 and 102 is proportional to the square of the flow rate in the venturi 16.
- the pressure sensors 101, 102 of the venturi 16 are furthermore connected to processing means 22, such as a micro-controller, for example the Texas Instruments micro-controller MSP430, implementing algorithms capable of processing the pressure measurements. and flow to infer, among other things, the daily treatment duration and the effectiveness of the patient's OSA treatment.
- processing means 22 such as a micro-controller, for example the Texas Instruments micro-controller MSP430, implementing algorithms capable of processing the pressure measurements. and flow to infer, among other things, the daily treatment duration and the effectiveness of the patient's OSA treatment.
- the processing means 22 preferably comprise means for correcting possible measurement errors due, for example, to small variations in the temperature and / or the pressure and / or humidity of the air.
- the pressure sensors 101, 102 may be, for example, BMP085 sensors marketed by Bosch, which are high precision barometric sensors offering an absolute accuracy of up to 0.03 hPa and a consumption as low as 3 ⁇ .
- Data storage means 24 are used to store all or part of the data thus measured, for example a data storage memory chip or a plug-in memory card, in particular an 8 GB SST flash memory card.
- transmission means 26 for example a radio frequency transmitter and its antenna, are provided for transmitting, preferably via a wireless transmission, all or part of said data to a remote receiver, such as a computer or server, as shown in Figure 2.
- the radio frequency transmitter may, for example, be equipped with an 870 MHz PHYCOMP antenna.
- Electrical power supply means are electrically connected to the sensors 101, 102 to the data storage means 24 and the transmission means 26 to provide power to the tracking device 2, for example a low voltage power supply comprising one or more batteries, batteries ...
- the tracking apparatus 2 has the function of measuring, independently of the AOS processing apparatus 6, that is, without using information or data internal to this processing apparatus 6 , and to communicate remotely the information relating to the observance and the effectiveness of the treatment, that is to say the duration of effective treatment of the patient, as well as the events like apneas, hypopneas, limitations of flow, snoring, leaks, etc.
- the housing 4 of the compliance monitoring apparatus 2 is incorporated in the path of the gas, that is to say on the pipe (s) 30.
- flexible gas routing between the treatment unit 6 distributing air, in particular continuous positive pressure, and the patient equipped with the nasal mask 8, and makes it possible to measure and record the daily treatment time, as well as the effectiveness of treatment.
- the tracking apparatus 2 is designed to be able to accommodate any type of SAOS processor 6, i.e., CPAP, BiPAP, and the like.
- the tracking apparatus 2 has a recording capacity of several months, preferably at least 1 year, which can be further extended.
- an information transmission link 31 for example radio frequency RF at a transmission frequency of 868 MHz or 2.4 GHz, or preferably a USB link, to a computer, a PDA, a server or any other means capable of directly recording the transmitted data, as shown in Figure 2.
- the tracking device 2 transmits remotely, using an integrated GSM or GPRS modem, the recordings data of compliance and effectiveness of the treatment of the patient to the health center or the service provider for example, where an adapted server 34 can generate reports of compliance and treatment efficiency.
- a patient is considered to be well-treated if two conditions are met, namely: if the patient's breathing is detected by a specific algorithm for processing the flow and pressure signals measured in the patient circuit, making it possible to deduce from these signals that the patient is wearing the nasal or naso-oral mask; and
- the effectiveness of the treatment is then deduced from the variations of pressure and flow rate related to the inspirations / expirations of the patient and the level of treatment pressure. It is measured by detecting the number of apneas, hypopneas, flow limitations, leakage from the patient circuit or mask, and snoring time occurring during treatment.
- the treatment of OSA consists of breathing the patient at a relative pressure, which may vary from 4 to 20 cmH 2 0, prescribed by the doctor. This pressure is regulated by the air generator and corresponds substantially to that in the mask plugged into the patient's nose at the nearest pressure drop in the patient circuit.
- the existing venturis have, for the range of flow considered, between 0 and 130 1 / min, a loss of pressure, also called pressure drop, between the inlet and the outlet of the venturi greater than 1 cm H 2 0. This value is very high. Indeed, the additional pressure drop generated by an apparatus inserted into the permissible patient circuit is at most 0.2 cm H 2 0 in use without unintentional leakage to the mask, that is to say for a gas flow rate between 60 and 70 1 / min. This corresponds to 0.8 cm H 2 0 for a flow rate of 130 l / min.
- the venturi 16 is designed so as to obtain a pressure loss of less than 80 Pa for the flow rate range under consideration. To achieve this performance, the venturi 16 is preferably a venturi nozzle having a geometry as shown in FIG. .
- the venturi 16 comprises an inlet 40 and an outlet 42 of cylindrical shape and of the same diameter D1.
- the diameter D1 is adapted to the outlet diameter of the air generator of the treatment apparatus 6. It is in particular equal to 17.3 mm.
- the first pressure sensor 101 of the venturi is positioned at the inlet 40 to measure the pressure of the gas at the inlet of the venturi.
- the venturi 16 further comprises a convergent 44, having an inlet diameter D3 and formed of two circular arcs 46, 48 of respective radii R1, R2, as clearly shown in the enlarged view of the arcs of circles in the figure 3.
- the centers of the arcs of circles 46,48 are marked with respect to the inlet 40 of the venturi 16 along the x axis and with respect to the axis of the venturi along the y axis.
- the inlet diameter D3 of the convergent 44 is chosen between 14 and 16 mm, in particular equal to 15 mm.
- the venturi 16 also comprises a neck 50 of cylindrical shape of diameter D2 and extending over a length L2.
- the length L2 is chosen between 5 and 10 mm, preferably equal to 7.5 mm.
- the diameter D2 of the neck 50 is preferably between 9 and 11 mm, in particular equal to 10 mm.
- the second pressure sensor 102 of the venturi is positioned at the neck 50 to measure the pressure of the gas at said neck of the venturi.
- the venturi 16 finally comprises a divergent 52, of conical shape, located between the neck 50 and the outlet 42.
- the divergent 52 is characterized by an angle of divergence 2a with respect to the horizontal axis x (the angle a of FIG. 3 representing half of the angle of divergence).
- the divergence angle 2a is preferably between 5 and 15 °.
- the connecting portion between the neck 50 and the divergent 52 is a sharp angle.
- a first venturi is characterized by a neck diameter D2 equal to 10 mm and a divergence angle 2a equal to 10 °.
- a second venturi is characterized by a neck diameter D2 equal to 10 mm and a divergence angle 2a equal to 8 °.
- venturis have very satisfactory performance since they cause a total pressure drop between the inlet 40 and the outlet 42 of said venturi limited to 68 Pa for a flow rate of 130 liters per minute.
- the venturi respiratory event detection sensitivity as being the ratio between the useful differential pressure (i.e., the difference between the pressure measured by the sensor 101 at the P2 plane upstream of the the inlet of the neck and the pressure measured by the sensor 102 at the plane P5 located in the neck) and the pressure loss of the gas between the inlet 40 and the outlet 42 of said venturi, the following results are obtained:
- the first venturi has a sensitivity equal to 6.26;
- the second venturi has a sensitivity equal to 6.36.
- the obstructive sleep apnea treatment compliance monitoring apparatus of the present invention is particularly well suited for monitoring compliance with a treatment of obstructive sleep apnea in a patient.
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Abstract
Description
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Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12705319.7A EP2678061A1 (fr) | 2011-02-24 | 2012-01-11 | Appareil de suivi de l'observance d'un traitement de l'apnée obstructive du sommeil |
US14/001,124 US20130331726A1 (en) | 2011-02-24 | 2012-01-11 | Apparatus for tracking compliance with a treatment for obstructive sleep apnea |
CN2012800101533A CN103391793A (zh) | 2011-02-24 | 2012-01-11 | 用于跟踪对阻塞性睡眠呼吸暂停的治疗的遵从性的设备 |
CA2823861A CA2823861A1 (fr) | 2011-02-24 | 2012-01-11 | Appareil de suivi de l'observance d'un traitement de l'apnee obstructive du sommeil |
AU2012220479A AU2012220479A1 (en) | 2011-02-24 | 2012-01-11 | Apparatus for tracking compliance with a treatment for obstructive sleep apnea |
JP2013554926A JP2014508595A (ja) | 2011-02-24 | 2012-01-11 | 閉塞性睡眠時無呼吸の治療の順守を追跡するための装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1151484 | 2011-02-24 | ||
FR1151484A FR2971930B1 (fr) | 2011-02-24 | 2011-02-24 | Appareil de suivi de l'observance d'un traitement de l'apnee obstructive du sommeil |
Publications (1)
Publication Number | Publication Date |
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WO2012114004A1 true WO2012114004A1 (fr) | 2012-08-30 |
Family
ID=45755365
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2012/050072 WO2012114004A1 (fr) | 2011-02-24 | 2012-01-11 | Appareil de suivi de l'observance d'un traitement de l'apnée obstructive du sommeil |
Country Status (8)
Country | Link |
---|---|
US (1) | US20130331726A1 (fr) |
EP (1) | EP2678061A1 (fr) |
JP (1) | JP2014508595A (fr) |
CN (1) | CN103391793A (fr) |
AU (1) | AU2012220479A1 (fr) |
CA (1) | CA2823861A1 (fr) |
FR (1) | FR2971930B1 (fr) |
WO (1) | WO2012114004A1 (fr) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
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EP3369452A1 (fr) * | 2017-03-03 | 2018-09-05 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Appareil de traitement médical à débitmètre à oscillation fluidique et module de communication longue distance |
US10493227B2 (en) | 2014-02-18 | 2019-12-03 | Koninklijke Philips N.V. | Headgear tubing assembly and integrated pressure sensing |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
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US7942824B1 (en) * | 2005-11-04 | 2011-05-17 | Cleveland Medical Devices Inc. | Integrated sleep diagnostic and therapeutic system and method |
WO2015058089A1 (fr) | 2013-10-18 | 2015-04-23 | Silverbow Development Llc | Techniques pour déterminer une pression de voies aériennes d'un patient |
US20180177960A1 (en) * | 2014-03-21 | 2018-06-28 | Fisher & Paykel Healthcare Limited | Sensing arrangement for gas delivery system |
WO2016030777A1 (fr) * | 2014-08-26 | 2016-03-03 | Asmedic Ltd. | Appareil d'administration de médicaments |
US20180185596A1 (en) * | 2015-06-30 | 2018-07-05 | Koninklijke Philips N.V. | Barometric pressure sensor for variable resistance positive airway pressure device circuit compensation |
US20190001085A1 (en) | 2015-12-21 | 2019-01-03 | 3M Innovative Properties Company | Medicinal inhalers |
EP3448255A4 (fr) * | 2016-04-14 | 2020-02-19 | Vo2 Master Health Sensors Inc. | Dispositif de mesure de la consommation d'oxygène d'un utilisateur |
CN106762244B (zh) * | 2016-12-30 | 2019-02-01 | 广西玉柴机器股份有限公司 | 发动机egr废气流量的测量管路 |
CN106704047B (zh) * | 2017-01-23 | 2018-08-10 | 广西玉柴机器股份有限公司 | Egr文丘里管 |
JP2018201724A (ja) * | 2017-05-31 | 2018-12-27 | 日本光電工業株式会社 | 呼吸気圧センサ |
CN109395270A (zh) * | 2018-10-31 | 2019-03-01 | 航宇救生装备有限公司 | 氧气系统压力损失补偿方法 |
CN110793580B (zh) * | 2019-11-06 | 2021-01-19 | 宁波水表(集团)股份有限公司 | 一种超声波水表测量段两侧的圆弧过渡结构 |
US20220202358A1 (en) * | 2020-12-29 | 2022-06-30 | Industrial Technology Research Institute | Electronic device and method for detecting apnea |
FR3142338A1 (fr) * | 2022-11-25 | 2024-05-31 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Système pour prédire un risque de non-adhérence à un traitement de l’apnée du sommeil |
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GB2267758A (en) * | 1992-05-28 | 1993-12-15 | Nagano Limited | Airflow measuring device |
US6546811B2 (en) * | 1997-09-24 | 2003-04-15 | Bechtel Bwxt Idaho, Llc | Multiphase flow calculation software |
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2011
- 2011-02-24 FR FR1151484A patent/FR2971930B1/fr not_active Expired - Fee Related
-
2012
- 2012-01-11 CN CN2012800101533A patent/CN103391793A/zh active Pending
- 2012-01-11 EP EP12705319.7A patent/EP2678061A1/fr not_active Ceased
- 2012-01-11 WO PCT/FR2012/050072 patent/WO2012114004A1/fr active Application Filing
- 2012-01-11 JP JP2013554926A patent/JP2014508595A/ja active Pending
- 2012-01-11 US US14/001,124 patent/US20130331726A1/en not_active Abandoned
- 2012-01-11 AU AU2012220479A patent/AU2012220479A1/en not_active Abandoned
- 2012-01-11 CA CA2823861A patent/CA2823861A1/fr not_active Abandoned
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US6135106A (en) * | 1997-08-22 | 2000-10-24 | Nellcor Puritan-Bennett, Inc. | CPAP pressure and flow transducer |
US20040167419A1 (en) | 2003-02-26 | 2004-08-26 | Maquet Critical Care Ab | Flow meter arrangement |
US20040187871A1 (en) * | 2003-03-28 | 2004-09-30 | Ric Investments, Inc. | Pressure support compliance monitoring system |
EP2017586A1 (fr) | 2007-07-20 | 2009-01-21 | Map-Medizintechnologie GmbH | Moniteur pour appareil de CPAP/ventilateur |
WO2009136101A1 (fr) | 2008-04-21 | 2009-11-12 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Dispositif de detection de l'observance par un patient d'un traitement d'oxygenotherapie |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10493227B2 (en) | 2014-02-18 | 2019-12-03 | Koninklijke Philips N.V. | Headgear tubing assembly and integrated pressure sensing |
EP3369452A1 (fr) * | 2017-03-03 | 2018-09-05 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Appareil de traitement médical à débitmètre à oscillation fluidique et module de communication longue distance |
FR3063433A1 (fr) * | 2017-03-03 | 2018-09-07 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Appareil de traitement medical a debitmetre a oscillation fluidique et module de communication longue distance |
Also Published As
Publication number | Publication date |
---|---|
CN103391793A (zh) | 2013-11-13 |
FR2971930B1 (fr) | 2014-02-28 |
AU2012220479A1 (en) | 2013-07-25 |
EP2678061A1 (fr) | 2014-01-01 |
JP2014508595A (ja) | 2014-04-10 |
FR2971930A1 (fr) | 2012-08-31 |
CA2823861A1 (fr) | 2012-08-30 |
US20130331726A1 (en) | 2013-12-12 |
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