WO1997006843A1 - A computer controlled portable ventilator - Google Patents

A computer controlled portable ventilator Download PDF

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Publication number
WO1997006843A1
WO1997006843A1 PCT/IL1996/000084 IL9600084W WO9706843A1 WO 1997006843 A1 WO1997006843 A1 WO 1997006843A1 IL 9600084 W IL9600084 W IL 9600084W WO 9706843 A1 WO9706843 A1 WO 9706843A1
Authority
WO
WIPO (PCT)
Prior art keywords
patient
compressor
air
cpu
valve
Prior art date
Application number
PCT/IL1996/000084
Other languages
French (fr)
Inventor
David Weintraub
Tsvi Gassner
Nir Gefen
Original Assignee
David Weintraub
Tsvi Gassner
Nir Gefen
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by David Weintraub, Tsvi Gassner, Nir Gefen filed Critical David Weintraub
Priority to AU67536/96A priority Critical patent/AU6753696A/en
Priority to DE19681531T priority patent/DE19681531T1/en
Priority to GB9803277A priority patent/GB2319967B/en
Publication of WO1997006843A1 publication Critical patent/WO1997006843A1/en

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Classifications

    • 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
    • A61M16/0066—Blowers or centrifugal pumps
    • A61M16/0069—Blowers or centrifugal pumps the speed thereof being controlled by respiratory parameters, e.g. by inhalation
    • 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
    • A61M16/022—Control means therefor
    • A61M16/024—Control means therefor including calculation means, e.g. using a processor
    • 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
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/201—Controlled valves
    • A61M16/202—Controlled valves electrically actuated
    • A61M16/203—Proportional
    • A61M16/204—Proportional used for inhalation control
    • 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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/105—Filters
    • A61M16/106—Filters in a path
    • A61M16/107—Filters in a path in the inspiratory path
    • 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
    • A61M16/20—Valves specially adapted to medical respiratory devices
    • A61M16/208—Non-controlled one-way valves, e.g. exhalation, check, pop-off non-rebreathing valves
    • A61M16/209—Relief valves
    • 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
    • A61M2016/0015—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors
    • A61M2016/0018—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical
    • A61M2016/0021—Accessories therefor, e.g. sensors, vibrators, negative pressure inhalation detectors electrical with a proportional output signal, e.g. from a thermistor
    • 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
    • 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
    • A61M2016/0042—Accessories therefor, e.g. sensors, vibrators, negative pressure with a flowmeter electrical in the expiratory circuit
    • 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
    • A61M2230/00—Measuring parameters of the user
    • A61M2230/40—Respiratory characteristics
    • A61M2230/43—Composition of exhalation
    • A61M2230/432—Composition of exhalation partial CO2 pressure (P-CO2)

Definitions

  • the present invention relates to a computer controlled portable ventilator. More specifically, the said invention relates to a computer controlled portable ventilatorg which is powered by an intern compressor and has two modes of operation; a preset mode using the patient weight data to select a preprogrammed ventilation procedure, and a user set mode wherein the operator is selecting the ventilation parameters such as rate, tidal volume and maximum pressure.
  • More sophisticated transport or home care ventilators that can be operated by an internal battery are usually heavier than 10 Kg and relatively expensive, so they are not really portable and not very common.
  • the ventilator according to the present invention was designed from the very begining as a computer controled mechanizm (unlike the respirator described in the U.S. patent no. 5398676).
  • the said ventilator according to the present invention is inovative in being light weight (7 Kg or less) and internally powered which makes it really portable, and in being completely computer-controlled which will enable simple, accurate and effective operation and simple mechanical design.
  • the present invention provides a computer controlled portable ventilator device comprising;
  • a main electronic board containing a double CPU unit connected to the said power supply, to the compressor unit and to all the electronically controlled units, to all the sensors and to the control display and alarm panel;
  • a patient circuit hose connected to the said inspiratory flow sensor;
  • a simple passive patient valve or a three way soleniod operated valve connected to the patient circuet and to a means for providing air to the patient's lungs;
  • a mechanical back-up relief valve connected to the inspiratry flow sensor or to the patient valve to protect the patient from a possible over pressure;
  • the present invention provides a ventilator that has two operation modes -
  • a patient's weight adjustment knob is rotated to provide an input to the CPU.
  • the CPU uses the weight data to select a preprogam ed ventilation procedure and the desired ventilation parameters.
  • the CPU is using also the input of the different sensors in a close loop way of control.
  • the operator selects the ventilation parameters such as Rate, Tidal Volume and Relief Pressure, and the ventilation method such as SIMV, IPPV, Pressure support.
  • the ventilation parameters such as Rate, Tidal Volume and Relief Pressure
  • the ventilation method such as SIMV, IPPV, Pressure support.
  • the main aim of every positive ventilation procedure is to deliver compressed air and/or oxygen into the patient's lungs.
  • volume controlled ventilators a qualified operator has to select the basic parameters: Rate/Frequency (beats per minute), Tidal Volume (ml) or the Minute Volume (L/min), and Relief Pressure. (Air Mix i.e. oxygen concentration and Ventilatoin Method can also be selected in many of the "Automatic Ventilators").
  • the ventilator will operate at the selected rate while trying to deliver the selected desired volume within the peak pressure limit.
  • Another important parameter is the I:E (Inspirium : Expirium) ratio that normally has to be 1:2.
  • Most of the transport or portable automatic ventilators are pneumatically or electromechanically controlled in a basically open loop control way.
  • the actual tidal or minute volume is a result of the patient's physical properties (air way resistance and lungs compliance), together with the ventilator ability and limitations, and is not always presented to the operator. An experienced operator may correct the selected parameters, if needed, after having a feedback by understanding the patient's situation. Most of these ventilators depend on an external power supply,usually a compressed 0 2 tank which limits the portability and/or the operation time of the ventiltaor.
  • the ventilator according to the persent invention is designed to improve the controlability, the effectiveness and the portability. It has two operation modes:
  • Preset Mode - The operator will evaluate the patient weight and adjust the knob to the estimated weight which is the main factor for determining the ventilation parameters including the maximum pressure.
  • the CPU will use the weight data to select a pre-programmed ventilation procedure. While ventilating the actual patient, the CPU will try to maintain the desired ventilation parameters by using the input of the different sensors in a close loop way of control. If the patient's physical situation will not enable to achieve the desired tidal or minute volume (or PCO_) using the initial pre-programmed procedure, the CPU will automatically change the ventilation parameters (within pre-programmed limits), ;.n order to achieve the desired results.
  • the actual Rate, tidal or Minute Volume will be constantly presented on the control panel. A built in alarm system will alert and display the ventilation and system problems or failiers.
  • FIG. 1 is a flow diagram of the components of the device of this invention.
  • Figure 2 is an outside view of the said ventilator.
  • Figure 3. illustrates a cross-section of the demand value.
  • the computer controlled portable ventilator according to the present invention is based preliminarily, on a rotary (or other) type compressor (7) connected (as one unit) to DC motor, driver (7a) and activated in a pulse way.
  • the compressor unit is activated on each Inspiration phase and then stopped on each expiration phase, so there is no need for any control valves.
  • a digital magnetic-latching valve or in other words, a PWM (pluse wave modulator) valve (8) or a fast reaction three way patient valve (12) can be added. While using this more complicated option, the compressor unit will be activated more constantly.
  • the compressor sucks external free air through an inlet filter (1) that can be a simple fiber type one for general use, or an active carbon type for use in a dangerous poisoned area.
  • Low pressure oxygen can be added through a standard port (2) and a special or standard demand value (see figure 3) that will be opened each time that the compressor sucks air or during a spontaneous breath, and at the same time will regulate the oxygen pressure to be equal to the free air pressure.
  • the air/0_ mixer (4) will provide 40-50% oxygen concentration, unless the air inlet is blocked in order to have 100% oxygen concentration.
  • a patient weight adjustment knob (6) will give an input to the CPU (19) in order to determine the basic ventilation parameters (rate and air volume) and the maximum pressure, as an initial ventilation program.
  • the same knob can also control a mechanical valve (5) to throttle the compressor's inlet.
  • the compressed air goes through an Inspiratory flow sensor (9) and a passure sensor that gives an input to the CPU.
  • mechanical pressure gage may be connected to the air stream displaying the actual pressure to the opertor. If not - the pressure will be displayed electronically.
  • the compressed air goes out of the ventilator through a flexible patient circuit hose (11), into either a simple passive patient valve or a three way solenoid operated valve (12).
  • a mechanical back-up relief valve (10) (optional) may be connected to prevent possible over-pressure.
  • An optional expiratory flow sensor (13) can be added to the outlet of the patient valve.
  • a PC0_ sensor (14) and a standard PEEP valve (15) can also be attached to the same outlet. (The PEEP valve will maintain small positive pressure during the expiration phase).
  • the inspiratory air goes to the patient's lungs through a standard face-mask, or through a laryngeal mask,
  • the pressure sensor (16) and the mechanical pressure gage can alternatively be attached to the inspiratory outlet of the patient valve in order to have more accurate pressure data. All the electronically controlled units and all the sensors are connected to the main electronic board (18) that contains a double CPU unit (19) and other components such as
  • the main board is connected to the control, display and alarm panel (20).
  • the ventilator will be powered by either an internal rechargeable (or other type) battery (21), or by external AC or DC power supply (22).
  • the said ventilation also has a patient weight adjustment knob (25) and an airway pressure display (26).
  • a patient weight adjustment knob (25) and an airway pressure display (26).
  • oxygen port (27) the patient hose connectoer (28), an external power connector (29) and free air inlet and filter (30).
  • the special demand value is designed to deliver the right volume of 0_ whenever there is a demand for it, and at the same time to regulate the 0_ pressure to be equal to the free air pressure.
  • this demand is created by either the compressor or by a spontaneous breath, it creates a relatively lower pressure in the chamber (33). This lower pressure pulls diaphragm (31) and metal plate (32) into the chamber (33).
  • Lever (34) slides on metal plate (32) to the left, and pulls rod (36) that is usually held to the right by spring (37).
  • rod (36) moves leftward it opens a way to oxygen coming from a cylinder tank plus reductor or from another medium pressure system. The oxygen will then flow through an Air/0_ mixer to the compressor, and then to the patient hose.
  • the flexible rubber diaphragm will regulate the 0_ pressure in the chamber to be equal to the free Air pressure or just a beet lower [each time the pressure in the chamber becomes equal to the free air pressure, the diaphragm goes out of the chamber so that lever (34) and rod (36) slide rightward to block the 0_ way].

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  • Health & Medical Sciences (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

The present invention provides a computer controlled ventilator device meant for delivering compressed air and/or oxygen into a patient's lungs. The said device is comprised of: (a) an electrical power supply (21, 22); (b) a main electronic board containing a double CPU unit (19), connected to the said power supply (21, 22) to the compressor (7) and to all the electronically controlled units to all the sensors and to the control display and alarm panel (20); (c) a control display and alarm panel (20) connected to the said main electronic board (18); (d) an air compressor (7) having a pulse-activated DC motor (7a) connected to the main electronic board (18); (e) a first means for supplying air or air/O2 mixture to the said compressor (7); (f) a second means for selecting the operation mode, connected to the CPU (19) and to the compressor (7); (g) an inspiratory flow sensor (9) and a pressure sensor (16) connected to the compressor (7) and to the CPU (19); (h) a patient circuit hose (11) connected to the said inspiratory flow sensor (9); (i) a simple passive patient valve or three-way solenoid operated valve (12) connected to the patient circuit (11) and to a means (17) for providing air to the patient's lungs; (j) a mechanical back-up relief valve (10), connected to the inspiratory flow sensor (9) or to the patient valve (12) to protect the patient from a possible overpressure; (k) a third means (17) for providing air to the patient's lungs. The present invention provides a ventilator that has two operation modes: (a) Preset Mode; (b) User-set Mode. In the preset mode a patient's weight adjustement knob (6, 25) is rotated to provide an input to the CPU (19). The CPU (19) uses the weight data to select a preprogrammed ventilation procedure and the desired ventilation parameters. The CPU (19) uses also the input to the different sensors for feedback control. In the user-set mode, the operator selects the ventilation parameters such as Rate, Tidal Volume and Relief Pressure, and the ventilation method such as SIMV, IPPV, and Pressure support.

Description

A COMPUTER CONTROLLED PORTABLE VENTILATOR
FIELD OF THE INVENTION
The present invention relates to a computer controlled portable ventilator. More specifically, the said invention relates to a computer controlled portable ventilatorg which is powered by an intern compressor and has two modes of operation; a preset mode using the patient weight data to select a preprogrammed ventilation procedure, and a user set mode wherein the operator is selecting the ventilation parameters such as rate, tidal volume and maximum pressure.
BACKROUND OF THE INVENTION
Modern resusciation and transportation of trauma victims and other patient will often require a positive ventilation procedure. The same or similar procedure may also be used for treating other types of medical problems. This procedure is usually made manually by using Bag-Valve devices (Ambu) which iε not accurate and not easily operated afficiently, or by using "automatic" pneomatic transport ventilators. These "automatic" ventilators require an external (compressed 0_/air) power supply which limits the portabilty and the operation time. The which limits the portabilty and the operation time. The simple traditional control system of these ventilators have to be operated carefully and skillfully by an experienced operator that in many cases has to work under pressure.
More sophisticated transport or home care ventilators that can be operated by an internal battery are usually heavier than 10 Kg and relatively expensive, so they are not really portable and not very common.
The ventilator according to the present invention was designed from the very begining as a computer controled mechanizm (unlike the respirator described in the U.S. patent no. 5398676).
The said ventilator according to the present invention is inovative in being light weight (7 Kg or less) and internally powered which makes it really portable, and in being completely computer-controlled which will enable simple, accurate and effective operation and simple mechanical design.
SUMMERY OF THE INVENTION
The present invention provides a computer controlled portable ventilator device comprising;
(a) an electrical power supply;
(b) a main electronic board containing a double CPU unit, connected to the said power supply, to the compressor unit and to all the electronically controlled units, to all the sensors and to the control display and alarm panel;
(c) a control, display and alarm panel connected to the said main electronic doard;
(d) an air compressor having a DC motor activated in a pulse way connected to the main electronic board;
(e) a first means for supplying air or air/0_ mixture to the said compressor;
(f) a second means for selecting the operation mode, connected to the CPU and to the compressor;
(g) inspiratory flow sensor and a pressure sensor connected to the compressor and to the CPU;
(h) a patient circuit hose connected to the said inspiratory flow sensor; (i) a simple passive patient valve or a three way soleniod operated valve connected to the patient circuet and to a means for providing air to the patient's lungs; (j) (optional) a mechanical back-up relief valve connected to the inspiratry flow sensor or to the patient valve to protect the patient from a possible over pressure; (k) a third means for providing air to the patient's lungs. The present invention provides a ventilator that has two operation modes -
(a) Preset Mode; (b) User set Mode.
In the preset mode a patient's weight adjustment knob is rotated to provide an input to the CPU. The CPU uses the weight data to select a preprogam ed ventilation procedure and the desired ventilation parameters. The CPU is using also the input of the different sensors in a close loop way of control.
In the user set mode the operator selects the ventilation parameters such as Rate, Tidal Volume and Relief Pressure, and the ventilation method such as SIMV, IPPV, Pressure support.
DETAILD DESCRIPTION OF THE INVENTION
The main aim of every positive ventilation procedure is to deliver compressed air and/or oxygen into the patient's lungs. On standard time cycled, volume controlled ventilators, a qualified operator has to select the basic parameters: Rate/Frequency (beats per minute), Tidal Volume (ml) or the Minute Volume (L/min), and Relief Pressure. (Air Mix i.e. oxygen concentration and Ventilatoin Method can also be selected in many of the "Automatic Ventilators"). The ventilator will operate at the selected rate while trying to deliver the selected desired volume within the peak pressure limit. Another important parameter is the I:E (Inspirium : Expirium) ratio that normally has to be 1:2. Most of the transport or portable automatic ventilators are pneumatically or electromechanically controlled in a basically open loop control way. The actual tidal or minute volume is a result of the patient's physical properties (air way resistance and lungs compliance), together with the ventilator ability and limitations, and is not always presented to the operator. An experienced operator may correct the selected parameters, if needed, after having a feedback by understanding the patient's situation. Most of these ventilators depend on an external power supply,usually a compressed 02 tank which limits the portability and/or the operation time of the ventiltaor.
The ventilator according to the persent invention is designed to improve the controlability, the effectiveness and the portability. It has two operation modes:
Preset Mode - The operator will evaluate the patient weight and adjust the knob to the estimated weight which is the main factor for determining the ventilation parameters including the maximum pressure. The CPU will use the weight data to select a pre-programmed ventilation procedure. While ventilating the actual patient, the CPU will try to maintain the desired ventilation parameters by using the input of the different sensors in a close loop way of control. If the patient's physical situation will not enable to achieve the desired tidal or minute volume (or PCO_) using the initial pre-programmed procedure, the CPU will automatically change the ventilation parameters (within pre-programmed limits), ;.n order to achieve the desired results. The actual Rate, tidal or Minute Volume, will be constantly presented on the control panel. A built in alarm system will alert and display the ventilation and system problems or failiers.
The simple way of adjusting, thgether with the smart computer control, will produce an effective ventilation even when the said ventilator will be operated by an inexperienced operator or by an operator acting under pressure. User set mode - An experienced qualified operator will have the opportunity to select the user set Mode. This Mode will give the ability to select Rate, Tidal Volume, and maximum Pressure, and ventilation method in a similar way to the conventional portable ventilators. The computerized closed loop control system will automatically correct the compressor operation in order to achive the desired tidal volume. The advanced alarm system and displays will help the operator to understand the actual results and correct the parameters accordingly.
The present invention wili be further understood with reference to figures 1-3. These figures do not intend to limit the scope of the invention but only to clarify it by presenting the prefered embodiment.
Figure 1 is a flow diagram of the components of the device of this invention,
Figure 2 is an outside view of the said ventilator.
Figure 3.illustrates a cross-section of the demand value.
Refering to Figure 1 -
The computer controlled portable ventilator according to the present invention is based preliminarily, on a rotary (or other) type compressor (7) connected (as one unit) to DC motor, driver (7a) and activated in a pulse way. For basic ventilation requirements, the compressor unit is activated on each Inspiration phase and then stopped on each expiration phase, so there is no need for any control valves. For more demending requirments; a digital magnetic-latching valve or in other words, a PWM (pluse wave modulator) valve (8) or a fast reaction three way patient valve (12) can be added. While using this more complicated option, the compressor unit will be activated more constantly.
The compressor sucks external free air through an inlet filter (1) that can be a simple fiber type one for general use, or an active carbon type for use in a dangerous poisoned area. Low pressure oxygen can be added through a standard port (2) and a special or standard demand value (see figure 3) that will be opened each time that the compressor sucks air or during a spontaneous breath, and at the same time will regulate the oxygen pressure to be equal to the free air pressure. When the oxygen supply is connected, the air/0_ mixer (4) will provide 40-50% oxygen concentration, unless the air inlet is blocked in order to have 100% oxygen concentration. A patient weight adjustment knob (6) will give an input to the CPU (19) in order to determine the basic ventilation parameters (rate and air volume) and the maximum pressure, as an initial ventilation program. The same knob can also control a mechanical valve (5) to throttle the compressor's inlet. The compressed air goes through an Inspiratory flow sensor (9) and a passure sensor that gives an input to the CPU. At this point mechanical pressure gage may be connected to the air stream displaying the actual pressure to the opertor. If not - the pressure will be displayed electronically. The compressed air goes out of the ventilator through a flexible patient circuit hose (11), into either a simple passive patient valve or a three way solenoid operated valve (12). A mechanical back-up relief valve (10) (optional) may be connected to prevent possible over-pressure. An optional expiratory flow sensor (13) can be added to the outlet of the patient valve. A PC0_ sensor (14) and a standard PEEP valve (15) can also be attached to the same outlet. (The PEEP valve will maintain small positive pressure during the expiration phase). The inspiratory air goes to the patient's lungs through a standard face-mask, or through a laryngeal mask,
SUBSTITUTE SHEET or through a tracheal tube (17). The pressure sensor (16) and the mechanical pressure gage can alternatively be attached to the inspiratory outlet of the patient valve in order to have more accurate pressure data. All the electronically controlled units and all the sensors are connected to the main electronic board (18) that contains a double CPU unit (19) and other components such as
Amplifiers,D/A & A/D convertors, Decoders and other known components and circuits. The main board is connected to the control, display and alarm panel (20). The ventilator will be powered by either an internal rechargeable (or other type) battery (21), or by external AC or DC power supply (22).
Referring to figure 2 -
Illustrates an outside view of the ventilation having a ventilation parameters display and control (23); and an alarm display (24).
The said ventilation also has a patient weight adjustment knob (25) and an airway pressure display (26). In this outside view of the ventilation we also see oxygen port (27) the patient hose connectoer (28), an external power connector (29) and free air inlet and filter (30).
Referring to figure 3 -
The special demand value is designed to deliver the right volume of 0_ whenever there is a demand for it, and at the same time to regulate the 0_ pressure to be equal to the free air pressure. When this demand is created by either the compressor or by a spontaneous breath, it creates a relatively lower pressure in the chamber (33). This lower pressure pulls diaphragm (31) and metal plate (32) into the chamber (33). Lever (34) slides on metal plate (32) to the left, and pulls rod (36) that is usually held to the right by spring (37). When rod (36) moves leftward it opens a way to oxygen coming from a cylinder tank plus reductor or from another medium pressure system. The oxygen will then flow through an Air/0_ mixer to the compressor, and then to the patient hose. The flexible rubber diaphragm will regulate the 0_ pressure in the chamber to be equal to the free Air pressure or just a beet lower [each time the pressure in the chamber becomes equal to the free air pressure, the diaphragm goes out of the chamber so that lever (34) and rod (36) slide rightward to block the 0_ way].

Claims

CLAIMS :
1. A computer controlled portable ventilator device comprising;
(a) an electrical power supply;
(b) a main electronic board containing a double CPU unit, connected to the said power supply to the compressor and to all the electronically controlled units, to all the sensors and to the control display and alarm panel;
(c) a control, display and alarm panel connected to the said main electronic board;
(d) an air compressor having a DC motor activated in a pulse way connected to the main electronic board;
(e) a first means for supplying air or air/0_ mixture to the said compressor;
(f) a second means for selecting the operation mode, connected to the CPU and to the compressor;
(g) an inspiratory flow sensor and a pressure sensor connected to the compressor and to the CPU;
(h) a patient circuit hose connected to the said inspiratory flow sensor; (i) a simple passive patient valve or three way solenoid operated valve connected to the patient circuit and to a means for providing air to the patient's lungs; (j) a mechanical back-up relief valve connected to the inspiratry flow sensor or to the patient valve to protect the patient from a possible over pressure;
(k) a third means for providing air to the patient's lungs.
2. A portable ventilator device according to claim 1 wherein the power supply is an internal battery.
3. A portable ventilator device according to claim 1 wherein the power supply is an external AC or DC electrical power supply.
4. A portable ventilator device according to claim 1 wherein the compressor is a rotary compressor.
5. A portable ventilator device according to claim 4 wherein the compressor is connected, as one unit, to a DC motor and driver.
6. A portable ventilator device according to claim l wherein the compressor unit is activated by the CPU on each inspiration phase and then stopped on each expiration phase.
7. A portable ventilator device according to claim 1 wherein the air/0_ flow is controlled by a solonoid or a Digital Magnetic Valve (PWM Valve).
8. A portable ventilator device according to claim 1 wherein the means for supplying air or air/0_ mixture to the compressor is an air/02 mixer connected to a free air inlet filter and connected to an oxygen low pressure port through an auto/self regulated oxygen demand valve that is opened each time that the compressor is activated or by a spontaneous breath.
9. A portable ventilator device according to claim 7 wherein the free air inlet filter is a simple filter type filter or an active carbon type filter.
10. A portable ventilator device according to claim 1 having a present mode wherein a patient weight adjustment knob is rotated to provide an input to the CPU,and the CPU using the weight data to select a preprogrammed ventilation procedure and the desired ventilation parameters and the cpu is using also the input of the different sensors in a close loop way of control.
11. A portable ventilator device according to claim 10 wherein the basic ventilation parameters are maximum pressure, air volume and rate/frequency.
12. A portable ventilator device according to claim 10 comprised of a flow control valve controlled by the patient's weight adjustment knobs to throttle the compressor's inlet.
13. A portable ventilator device according to claim 1 wherein the inspiratory flow sensor and the pressur sensor gives an input to the CPU and then delivers air/0_ out of the ventilator through a flexible patient circuit hose into either a simple passive patient valve or a three way solenoid operated valve.
14. A portable ventilator device according to claim 1 comprising expirator flow sensor connected to the free air outlet of the patient valve.
15. A portable ventilator device according to claim 1 comprising a PC02 sensor connected to the free air outlet of the patient valve.
16. A portable ventilator device according to claim 1 comprising a standard PEEP valve connected to the free air outlet of the patient valve for maintaining a small positive pressure during the expiration phase.
17. A portable ventilator device according to claim 1 wherein the said means for providing the air to the patient's lungs is a standard face-mask, a laryngeal mask or a tracheal tube.
18. A portable ventilator device according to claim 1 having a user set mode wherein each of the ventilation parameters and methods can be selected by the operator.
19. A portable ventilator device according to claim 1 wherein a pressure sensor is connected to the inspriatory outlet having of the patient valve measuring the upper airway pressure, and connected to the CPU and to the said means for providing the air to the patient's lungs.
20. A portable ventilator device according to claim 1 wherein the CPU unit is using the input of the different sensors in a close loop way of control.
21. A portable ventilator device substantially as hereinbefore desrcibed and illustrated.
PCT/IL1996/000084 1995-08-16 1996-08-15 A computer controlled portable ventilator WO1997006843A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU67536/96A AU6753696A (en) 1995-08-16 1996-08-15 A computer controlled portable ventilator
DE19681531T DE19681531T1 (en) 1995-08-16 1996-08-15 Computer controlled, portable ventilator
GB9803277A GB2319967B (en) 1995-08-16 1996-08-15 A computer controlled portable ventilator

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IL114964 1995-08-16
IL11496495A IL114964A (en) 1995-08-16 1995-08-16 Computer controlled portable ventilator

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Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0911051A1 (en) * 1997-10-27 1999-04-28 Georges Boussignac Respiratory assistance device
WO2002066105A1 (en) 2001-02-16 2002-08-29 Resmed Ltd. Methods and apparatus for supplying clean breathable gas
WO2007041797A1 (en) * 2005-10-14 2007-04-19 Resmed Ltd Flow generator message system
WO2009059359A1 (en) * 2007-11-05 2009-05-14 Resmed Ltd Ventilation system and control thereof
CN101963147A (en) * 2010-08-27 2011-02-02 深圳市普博科技有限公司 Control panel and corresponding devices of airflow generating equipment
US20110138315A1 (en) * 2009-12-04 2011-06-09 Nellcor Puritan Bennett Llc Quick Initiation Of Respiratory Support Via A Ventilator User Interface
US8312877B2 (en) 2003-11-12 2012-11-20 Draeger Medical Systems, Inc. Modular medical care system
US8944057B2 (en) 2008-09-17 2015-02-03 Resmed Limited Method and apparatus for controlling a CPAP device
US20150202403A1 (en) * 2003-04-28 2015-07-23 Advanced Circulatory Systems, Inc. Vacuum and positive pressure ventilation systems and methods for intrathoracic pressure regulation
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US10279134B2 (en) 2005-03-01 2019-05-07 Resmed Limited Recognition system for an apparatus that delivers breathable gas to a patient
US10293125B2 (en) 2003-06-20 2019-05-21 Resmed Limited Flow generator with patient reminder
US10518055B2 (en) * 2013-09-05 2019-12-31 Eupnea Technologies Inc. Apparatus and method to provide breathing support
GB2593528A (en) * 2020-03-27 2021-09-29 Virtual Ward Tech Limited Respiratory treatment device

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6024089A (en) 1997-03-14 2000-02-15 Nelcor Puritan Bennett Incorporated System and method for setting and displaying ventilator alarms
DE102007014465A1 (en) * 2006-04-01 2007-12-06 Weinmann Geräte für Medizin GmbH & Co. KG Positive end expiratory pressure control, for a respiratory system, has the control valve in the connection between two switch valves
US8021310B2 (en) 2006-04-21 2011-09-20 Nellcor Puritan Bennett Llc Work of breathing display for a ventilation system
US7784461B2 (en) 2006-09-26 2010-08-31 Nellcor Puritan Bennett Llc Three-dimensional waveform display for a breathing assistance system
US8924878B2 (en) 2009-12-04 2014-12-30 Covidien Lp Display and access to settings on a ventilator graphical user interface
US8335992B2 (en) 2009-12-04 2012-12-18 Nellcor Puritan Bennett Llc Visual indication of settings changes on a ventilator graphical user interface
US9262588B2 (en) 2009-12-18 2016-02-16 Covidien Lp Display of respiratory data graphs on a ventilator graphical user interface
US8499252B2 (en) 2009-12-18 2013-07-30 Covidien Lp Display of respiratory data graphs on a ventilator graphical user interface
US10362967B2 (en) 2012-07-09 2019-07-30 Covidien Lp Systems and methods for missed breath detection and indication
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US9950129B2 (en) 2014-10-27 2018-04-24 Covidien Lp Ventilation triggering using change-point detection
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257453A (en) * 1979-04-06 1981-03-24 Ruth L. Hesse Peep valve with improved vibration damping
WO1989010768A1 (en) * 1988-05-10 1989-11-16 Sipin Anatole J Gas delivery means
WO1990004425A2 (en) * 1988-10-24 1990-05-03 Antec Systems Limited Gas sampling device and water trap
WO1992011054A1 (en) * 1990-12-21 1992-07-09 Puritan-Bennett Corporation Inspiratory airway pressure system
FR2682042A1 (en) * 1991-10-04 1993-04-09 Le Masson Yves Device for ventilating the respiratory airways with pulsed and filtered air and its applications
WO1993008857A1 (en) * 1991-11-01 1993-05-13 Respironics, Inc. Sleep apnea treatment apparatus
US5320094A (en) * 1992-01-10 1994-06-14 The Johns Hopkins University Method of administering insulin

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4257453A (en) * 1979-04-06 1981-03-24 Ruth L. Hesse Peep valve with improved vibration damping
WO1989010768A1 (en) * 1988-05-10 1989-11-16 Sipin Anatole J Gas delivery means
WO1990004425A2 (en) * 1988-10-24 1990-05-03 Antec Systems Limited Gas sampling device and water trap
WO1992011054A1 (en) * 1990-12-21 1992-07-09 Puritan-Bennett Corporation Inspiratory airway pressure system
FR2682042A1 (en) * 1991-10-04 1993-04-09 Le Masson Yves Device for ventilating the respiratory airways with pulsed and filtered air and its applications
WO1993008857A1 (en) * 1991-11-01 1993-05-13 Respironics, Inc. Sleep apnea treatment apparatus
US5320094A (en) * 1992-01-10 1994-06-14 The Johns Hopkins University Method of administering insulin

Cited By (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2770137A1 (en) * 1997-10-27 1999-04-30 Georges Boussignac RESPIRATORY ASSISTANCE DEVICE
WO1999021603A1 (en) * 1997-10-27 1999-05-06 Georges Boussignac Respiratory aid
US6273087B1 (en) 1997-10-27 2001-08-14 Georges Boussignac Respiratory aid
EP0911051A1 (en) * 1997-10-27 1999-04-28 Georges Boussignac Respiratory assistance device
EP1385566A4 (en) * 2001-02-16 2011-09-14 Resmed Ltd Methods and apparatus for supplying clean breathable gas
WO2002066105A1 (en) 2001-02-16 2002-08-29 Resmed Ltd. Methods and apparatus for supplying clean breathable gas
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US8622057B2 (en) 2001-02-16 2014-01-07 Resmed Ltd Methods and apparatus for supplying clean breathable gas
US10512749B2 (en) * 2003-04-28 2019-12-24 Zoll Medical Corporation Vacuum and positive pressure ventilation systems and methods for intrathoracic pressure regulation
US20150202403A1 (en) * 2003-04-28 2015-07-23 Advanced Circulatory Systems, Inc. Vacuum and positive pressure ventilation systems and methods for intrathoracic pressure regulation
US10293125B2 (en) 2003-06-20 2019-05-21 Resmed Limited Flow generator with patient reminder
US8312877B2 (en) 2003-11-12 2012-11-20 Draeger Medical Systems, Inc. Modular medical care system
US10279134B2 (en) 2005-03-01 2019-05-07 Resmed Limited Recognition system for an apparatus that delivers breathable gas to a patient
US10076617B2 (en) 2005-10-14 2018-09-18 Resmed Limited Flow generator message system
US8424514B2 (en) 2005-10-14 2013-04-23 Resmed Limited Flow generator message system
US11033699B2 (en) 2005-10-14 2021-06-15 ResMed Pty Ltd Flow generator message system
US9010328B2 (en) 2005-10-14 2015-04-21 Resmed Limited Flow generator message system
WO2007041797A1 (en) * 2005-10-14 2007-04-19 Resmed Ltd Flow generator message system
US9072848B2 (en) 2007-11-05 2015-07-07 Resmed Limited Ventilation system and control thereof
US10149952B2 (en) 2007-11-05 2018-12-11 Resmed Limited Continuous positive airway pressure device with user interface
WO2009059359A1 (en) * 2007-11-05 2009-05-14 Resmed Ltd Ventilation system and control thereof
US11298483B2 (en) 2008-09-17 2022-04-12 ResMed Pty Ltd Display and controls for a CPAP device
US10046128B2 (en) 2008-09-17 2018-08-14 Resmed Limited Display and controls for a CPAP device
US8944057B2 (en) 2008-09-17 2015-02-03 Resmed Limited Method and apparatus for controlling a CPAP device
US11969551B2 (en) 2009-06-19 2024-04-30 Zoll Medical Corporation Vacuum and positive pressure ventilation systems and methods for intrathoracic pressure regulation
US11583645B2 (en) 2009-06-19 2023-02-21 Zoll Medical Corporation Vacuum and positive pressure ventilation systems and methods for intrathoracic pressure regulation
US9119925B2 (en) * 2009-12-04 2015-09-01 Covidien Lp Quick initiation of respiratory support via a ventilator user interface
US20110138315A1 (en) * 2009-12-04 2011-06-09 Nellcor Puritan Bennett Llc Quick Initiation Of Respiratory Support Via A Ventilator User Interface
CN101963147A (en) * 2010-08-27 2011-02-02 深圳市普博科技有限公司 Control panel and corresponding devices of airflow generating equipment
US10518055B2 (en) * 2013-09-05 2019-12-31 Eupnea Technologies Inc. Apparatus and method to provide breathing support
US11311693B2 (en) * 2013-09-05 2022-04-26 Eupnea Technologies Inc. Apparatus and method to provide breathing support
WO2017006075A1 (en) * 2015-07-08 2017-01-12 Jianhe Li Dry powder inhaler apparatus
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GB9803277D0 (en) 1998-04-08
AU6753696A (en) 1997-03-12
IL114964A (en) 2000-10-31
IL114964A0 (en) 1995-12-08
GB2319967B (en) 2000-02-16
DE19681531T1 (en) 1999-03-18
GB2319967A (en) 1998-06-10

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