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GB1294808A - Temperature-controlled gas humidifier for a medical ventilator - Google Patents

Temperature-controlled gas humidifier for a medical ventilator

Info

Publication number
GB1294808A
GB1294808A GB38979/71A GB3897971A GB1294808A GB 1294808 A GB1294808 A GB 1294808A GB 38979/71 A GB38979/71 A GB 38979/71A GB 3897971 A GB3897971 A GB 3897971A GB 1294808 A GB1294808 A GB 1294808A
Authority
GB
United Kingdom
Prior art keywords
temperature
gas
chamber
water
detector
Prior art date
Legal status (The legal status 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 status listed.)
Expired
Application number
GB38979/71A
Inventor
George Edward Smythe
William Frederick Cox
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Philips Electronics UK Ltd
Original Assignee
Philips Electronic and Associated Industries Ltd
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 Philips Electronic and Associated Industries Ltd filed Critical Philips Electronic and Associated Industries Ltd
Priority to GB38979/71A priority Critical patent/GB1294808A/en
Priority to NL7211140A priority patent/NL7211140A/xx
Priority to SE1067772A priority patent/SE7210677L/en
Priority to DE2240659A priority patent/DE2240659A1/en
Priority to JP47083264A priority patent/JPS4829298A/ja
Priority to FR7229814A priority patent/FR2149581A1/fr
Publication of GB1294808A publication Critical patent/GB1294808A/en
Expired legal-status Critical Current

Links

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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/1075—Preparation of respiratory gases or vapours by influencing the temperature
    • A61M16/109—Preparation of respiratory gases or vapours by influencing the temperature the humidifying liquid or the beneficial agent
    • 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
    • A61M16/14—Preparation of respiratory gases or vapours by mixing different fluids, one of them being in a liquid phase
    • A61M16/16—Devices to humidify the respiration air
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/1906—Control of temperature characterised by the use of electric means using an analogue comparing device
    • G05D23/1909—Control of temperature characterised by the use of electric means using an analogue comparing device whose output amplitude can only take two discrete values
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
    • G05D23/00—Control of temperature
    • G05D23/19—Control of temperature characterised by the use of electric means
    • G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
    • G05D23/24—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature the sensing element having a resistance varying with temperature, e.g. 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/33—Controlling, regulating or measuring
    • A61M2205/3368—Temperature

Landscapes

  • Health & Medical Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Devices For Medical Bathing And Washing (AREA)
  • Control Of Resistance Heating (AREA)

Abstract

1294808 Humidifier for respiratory apparatus PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 19 Aug 1971 38979/71 Heading A5T [Also in Divisions B1 and G3] A gas humidifier for a medical ventilator comprises a "gas-over-hot-water" vaporisation chamber 1, means 5 for heating water contained in said chamber, an electrical temperature-sensing device 11 located near the patient end of a gas supply line 6 arranged for feeding humidified respiratory gas from the chamber to said patient, and water heater controlling means 12 operable upon the temperature sensed by said sensing device whereby said temperature is maintained at a predetermined level. Operation. Respiratory gas is passed from inlet 2 over the hot water in the chamber and thence to outlet 3 after having picked up water vapour. The gas is then fed via the flexible supply line 6 to the inspiratory gas inlet 7 of a Y-piece 8 and thence to a facemask or tracked tube via connection 9. The temperature-sensor 11 is located in the Y-piece 8. The sensor, preferably a thermistor, is electrically connected to a comparison device 12 via a plug and socket 13 which enable the facemask and supply line to be removed from the vaporisation chamber if necessary. A temperature-setting control device 14 is connected to the input of the comparison device 12, the output of the latter device being fed to a switching control unit 15 used for controlling a heater power supply switching arrangement 16 which comprises a triac in the supply path of the heater power supply to heater 5. The comparison device, preferably a differential amplifier, compares the temperature-sensing and temperature-setting signals and gives an output if the temperature sensed by sensor 11 is lower than that of the setting control device 14. If the temperatures are equal then no output signal is given and the switching control 15 no longer provides triggering pulses to the triac 16, and hence the current supply to the heating element 5 is switched off. In order to protect the patient a fault detector 18 is connected to the sensor leads at 19. If a fault is detected, detector 18 inhibits switching control 15 via lead 21 and prevents operation of the heating element. Also, a water temperature detector 22, such as a bimetallic switch, senses overheating in the chamber and causes operation of the detector 18.
GB38979/71A 1971-08-19 1971-08-19 Temperature-controlled gas humidifier for a medical ventilator Expired GB1294808A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB38979/71A GB1294808A (en) 1971-08-19 1971-08-19 Temperature-controlled gas humidifier for a medical ventilator
NL7211140A NL7211140A (en) 1971-08-19 1972-08-16
SE1067772A SE7210677L (en) 1971-08-19 1972-08-17 Temperature-controlled gas humidifier intended for a respirator device.
DE2240659A DE2240659A1 (en) 1971-08-19 1972-08-18 TEMPERATURE-CONTROLLED GAS HUMIDIFIER FOR VENTILATION APPARATUS
JP47083264A JPS4829298A (en) 1971-08-19 1972-08-19
FR7229814A FR2149581A1 (en) 1971-08-19 1972-08-21

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB38979/71A GB1294808A (en) 1971-08-19 1971-08-19 Temperature-controlled gas humidifier for a medical ventilator

Publications (1)

Publication Number Publication Date
GB1294808A true GB1294808A (en) 1972-11-01

Family

ID=10406885

Family Applications (1)

Application Number Title Priority Date Filing Date
GB38979/71A Expired GB1294808A (en) 1971-08-19 1971-08-19 Temperature-controlled gas humidifier for a medical ventilator

Country Status (6)

Country Link
JP (1) JPS4829298A (en)
DE (1) DE2240659A1 (en)
FR (1) FR2149581A1 (en)
GB (1) GB1294808A (en)
NL (1) NL7211140A (en)
SE (1) SE7210677L (en)

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221156A1 (en) * 1973-03-15 1974-10-11 Foures Guy
EP0008375A2 (en) * 1978-08-24 1980-03-05 Licentia Patent-Verwaltungs-GmbH Transmitter circuit
US4367734A (en) * 1980-08-28 1983-01-11 Dragerwerk Aktiengesellschaft Y-Fitting in the patient system of respirators
US4676237A (en) * 1985-01-29 1987-06-30 Boutade Worldwide Investments Nv Inhaler device
WO1988000068A1 (en) * 1986-07-04 1988-01-14 Virotherm Laboratories Ltd Medical breathing apparatus
US5086766A (en) * 1988-04-16 1992-02-11 Virotherm Laboratories Ltd. Medical breathing apparatus
GB2297914A (en) * 1995-02-16 1996-08-21 Smiths Industries Plc Humidifier system with humidity sensor
US5558084A (en) * 1991-10-04 1996-09-24 Fisher & Paykel Limited Humidifier with delivery tube condensation preventing structure and control
EP0885623A2 (en) * 1997-06-17 1998-12-23 FISHER & PAYKEL LIMITED Respiratory humidification system
US5896857A (en) 1996-12-20 1999-04-27 Resmed Limited Valve for use in a gas delivery system
USD419658S (en) 1998-08-28 2000-01-25 Resmed Limited Humidifier
WO2000033904A1 (en) * 1998-12-08 2000-06-15 Instrumentarum Corporation Arrangement in connection with feedback control system
WO2000033903A1 (en) * 1998-12-08 2000-06-15 Instrumentarium Corporation Arrangement in connection with equipment used in patient care
US6135432A (en) * 1995-06-08 2000-10-24 Resmed Limited Humidifier
WO2001013981A1 (en) * 1999-08-23 2001-03-01 Fisher & Paykel Healthcare Limited Humidity controller
US6336454B1 (en) 1997-05-16 2002-01-08 Resmed Limited Nasal ventilation as a treatment for stroke
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
EP1634614A2 (en) * 1997-06-17 2006-03-15 Fisher & Paykel Healthcare Limited Respiratory humidification system
FR2875138A1 (en) * 2004-09-15 2006-03-17 Mallinckrodt Dev France Sa CONTROL METHOD FOR A HEATING HUMIDIFIER
US7106955B2 (en) 1999-08-23 2006-09-12 Fisher & Paykel Healthcare Limited Humidity controller
US7962018B2 (en) 1997-06-17 2011-06-14 Fisher & Paykel Healthcare Limited Humidity controller
US10130787B2 (en) 1997-06-17 2018-11-20 Fisher & Paykel Healthcare Limited Humidity controller
CN109091730A (en) * 2017-06-21 2018-12-28 新乡学院 Portable vaporization device
EP3766534A1 (en) * 2004-08-20 2021-01-20 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2702674C3 (en) * 1977-01-24 1981-02-12 Draegerwerk Ag, 2400 Luebeck Respiratory gas humidifier
DE2751833C3 (en) * 1977-11-19 1989-03-16 Braun Ag, 6000 Frankfurt Electric hairdryer with blower and heater
DE3308819A1 (en) * 1983-03-12 1984-09-13 Drägerwerk AG, 2400 Lübeck VENTILATOR WITH HIGH FREQUENCY VENTILATION
SE449565C (en) * 1984-06-28 1990-02-12 Gambro Engstrom Ab ANTICOS AND / OR RESPIRATOR EQUIPMENT INCLUDING A HUMIDIFICATION AND / OR GAS CHAMBER
DE3730551A1 (en) * 1987-09-11 1989-03-30 Annedore Kinnle Med Techn Zube Respiratory gas humidifier
JPH0716521B2 (en) * 1988-09-27 1995-03-01 株式会社白石 Mixed gas breathing apparatus with humidifying unit for pneumatic work
DE4102223A1 (en) * 1991-01-23 1992-07-30 Peter Dr Sc Techn Schaller Patient hose heating for respirator - has heat exchanger heated by controlled heating element between breathing gas humidifier and inspiration hose
DE202006011754U1 (en) * 2006-07-28 2007-12-06 GRÜNDLER GmbH Device for condensate avoidance

Cited By (53)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2221156A1 (en) * 1973-03-15 1974-10-11 Foures Guy
EP0008375A2 (en) * 1978-08-24 1980-03-05 Licentia Patent-Verwaltungs-GmbH Transmitter circuit
EP0008375A3 (en) * 1978-08-24 1980-03-19 Licentia Patent-Verwaltungs-GmbH Transmitter circuit
US4367734A (en) * 1980-08-28 1983-01-11 Dragerwerk Aktiengesellschaft Y-Fitting in the patient system of respirators
US4676237A (en) * 1985-01-29 1987-06-30 Boutade Worldwide Investments Nv Inhaler device
WO1988000068A1 (en) * 1986-07-04 1988-01-14 Virotherm Laboratories Ltd Medical breathing apparatus
US5086766A (en) * 1988-04-16 1992-02-11 Virotherm Laboratories Ltd. Medical breathing apparatus
US5558084A (en) * 1991-10-04 1996-09-24 Fisher & Paykel Limited Humidifier with delivery tube condensation preventing structure and control
GB2297914A (en) * 1995-02-16 1996-08-21 Smiths Industries Plc Humidifier system with humidity sensor
US5769071A (en) * 1995-02-16 1998-06-23 Smiths Industries Plc Humidifier systems
GB2297914B (en) * 1995-02-16 1999-02-10 Smiths Industries Plc Humidifier systems
US6135432A (en) * 1995-06-08 2000-10-24 Resmed Limited Humidifier
US5896857A (en) 1996-12-20 1999-04-27 Resmed Limited Valve for use in a gas delivery system
US6776155B2 (en) 1997-05-16 2004-08-17 Resmed Limited Nasal ventilation as a treatment for stroke
US6336454B1 (en) 1997-05-16 2002-01-08 Resmed Limited Nasal ventilation as a treatment for stroke
EP1514570A3 (en) * 1997-06-17 2005-03-30 Fisher & Paykel Healthcare Limited Respiratory humidification system
USRE39724E1 (en) 1997-06-17 2007-07-17 Fisher & Paykel Healthcare Limited Respiratory humidification system
US10130787B2 (en) 1997-06-17 2018-11-20 Fisher & Paykel Healthcare Limited Humidity controller
EP2258432A3 (en) * 1997-06-17 2016-05-11 Fisher & Paykel Healthcare Limited Respiratory humidification system
EP0885623A3 (en) * 1997-06-17 2000-05-03 FISHER & PAYKEL LIMITED Respiratory humidification system
US9186477B2 (en) 1997-06-17 2015-11-17 Fisher & Paykel Healthcare Limited Humidity controller
US6584972B2 (en) 1997-06-17 2003-07-01 Fisher & Paykel Limited Respiratory humidification system
EP1329240A1 (en) * 1997-06-17 2003-07-23 Fischer & Paykel Limited Respiratory humidification system
US6694974B1 (en) 1997-06-17 2004-02-24 Fisher & Paykel Limited Respiratory humidification system
CN101306217B (en) * 1997-06-17 2012-02-22 菲舍尔和佩克尔保健有限公司 Respiratory humidification system
US6802314B2 (en) 1997-06-17 2004-10-12 Fisher & Paykel Limited Respiratory humidification system
EP0885623A2 (en) * 1997-06-17 1998-12-23 FISHER & PAYKEL LIMITED Respiratory humidification system
US7962018B2 (en) 1997-06-17 2011-06-14 Fisher & Paykel Healthcare Limited Humidity controller
EP1634614A2 (en) * 1997-06-17 2006-03-15 Fisher & Paykel Healthcare Limited Respiratory humidification system
CN101306219B (en) * 1997-06-17 2011-03-23 菲舍尔和佩克尔保健有限公司 Respiratory humidification system
EP2143459A1 (en) * 1997-06-17 2010-01-13 Fisher & Paykel Healthcare Limited Respiratory humidification system
EP1647297A2 (en) 1997-06-17 2006-04-19 Fisher & Paykel Healthcare Limited Respiratory humidification system
US7051733B2 (en) 1997-06-17 2006-05-30 Fisher & Paykel Healthcare Limited Respiratory humidification system
EP1647297A3 (en) * 1997-06-17 2009-10-07 Fisher & Paykel Healthcare Limited Respiratory humidification system
USRE40806E1 (en) 1997-06-17 2009-06-30 Fisher & Paykel Healthcare Limited Respiratory humidification system
US7263994B2 (en) 1997-06-17 2007-09-04 Fisher & Paykel Healthcare Limited Respiratory humidification system
EP1634614A3 (en) * 1997-06-17 2008-08-27 Fisher & Paykel Healthcare Limited Respiratory humidification system
US6397841B1 (en) 1997-06-18 2002-06-04 Resmed Limited Apparatus for supplying breathable gas
USD419658S (en) 1998-08-28 2000-01-25 Resmed Limited Humidifier
WO2000033903A1 (en) * 1998-12-08 2000-06-15 Instrumentarium Corporation Arrangement in connection with equipment used in patient care
US7290544B1 (en) 1998-12-08 2007-11-06 Ge Healthcare Finland Oy Arrangement in connection with feedback control system
WO2000033904A1 (en) * 1998-12-08 2000-06-15 Instrumentarum Corporation Arrangement in connection with feedback control system
US6892726B1 (en) 1998-12-08 2005-05-17 Instrumentarium Corp. Arrangement in connection with equipment used in patient care
US7106955B2 (en) 1999-08-23 2006-09-12 Fisher & Paykel Healthcare Limited Humidity controller
WO2001013981A1 (en) * 1999-08-23 2001-03-01 Fisher & Paykel Healthcare Limited Humidity controller
EP3766534A1 (en) * 2004-08-20 2021-01-20 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
EP4049703A1 (en) * 2004-08-20 2022-08-31 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US11679224B2 (en) 2004-08-20 2023-06-20 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US11911564B2 (en) 2004-08-20 2024-02-27 Fisher & Paykel Healthcare Limited Apparatus for measuring properties of gases supplied to a patient
US9084865B2 (en) 2004-09-15 2015-07-21 Covidien Ag System and method for regulating a heating humidifier
FR2875138A1 (en) * 2004-09-15 2006-03-17 Mallinckrodt Dev France Sa CONTROL METHOD FOR A HEATING HUMIDIFIER
WO2006029876A1 (en) * 2004-09-15 2006-03-23 Mallinckrodt Developpement France Humidifier including a device for regulating the degree of humidification of the air flow
CN109091730A (en) * 2017-06-21 2018-12-28 新乡学院 Portable vaporization device

Also Published As

Publication number Publication date
FR2149581A1 (en) 1973-03-30
NL7211140A (en) 1973-02-21
DE2240659A1 (en) 1973-03-01
JPS4829298A (en) 1973-04-18
SE7210677L (en) 1973-02-20

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees