US3399673A - Volatile anaesthetic vaporising apparatus - Google Patents

Volatile anaesthetic vaporising apparatus Download PDF

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Publication number
US3399673A
US3399673A US460681A US46068165A US3399673A US 3399673 A US3399673 A US 3399673A US 460681 A US460681 A US 460681A US 46068165 A US46068165 A US 46068165A US 3399673 A US3399673 A US 3399673A
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United States
Prior art keywords
valve
unit
oxygen
inlet
air
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Expired - Lifetime
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US460681A
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English (en)
Inventor
Jones Wilfred
Edmondson William
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Cyprane Ltd
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Cyprane Ltd
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Publication date
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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
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics

Definitions

  • a portable anaesthetic apparatus comprises a valvecontrollable volatile anaesthetic vaporiser having a connection from its inlet to a high region outlet from an oxygen economiser reservoir furnished with a high region air inlet-exhaust port, a pendant partly dividing plate in said reservoir between said inlet and said outlet, an oxygen supply inlet to the connection between the vaporiser and the reservoir, 2.
  • twin vertically spaced-apart light-weight plate valve members controlling two flow passage ports leading to a connection to a face mask, a third inlet port between said two ports with an inlet connection from a bellows unit, and a passage from the bellows inlet connection to a pressure chamber in said valve unit behind a diaphragm, said diaphragm controlling a valve which normally closes an expiration port from the face mask to atmosphere.
  • This invention relates to apparatus capable of mixing the vapour of a volatile liquid anaesthetic with a gaseous fluid, such as air or oxygen, or a combination thereof.
  • a portable anaesthetic apparatus could be an advantage for the administration of a volatile anaesthetic in air to which oxygen could be added economically.
  • Such an apparatus may be of a type to be used almost anywhere an operation could be carried out and thus it would be ideal for emergency work.
  • Said apparatus could be such that it would not include an oxygen cylinder, as such cylinders may be available on the site of an accident, although an oxygen cylinder could be included and'the unit be more of a transportable type.
  • anaesthetic apparatus including a valve controlled volatile anaesthetic vaporiser, a reservoir providing an air inlet to the vaporiser, oxygen supply means connected to the vaporiser and reservoir, a valve control unit connected to said vaporiser and a bellows unit and controlling an inspiration outlet to and an expiration outlet from connection means for a patients mask, said unit having nonreturn valve means between said inspiration outlet the bellows unit and the vaporiser for controlling the flow of air/oxygen and anaesthetic vapour mixture and a patients expiration.
  • the improved apparatus which may be constructed to be portable or otherwise, includes a liquid anaesthetic containing vaporising unit 1 for air and/or oxygen to pass thereinto and become admixed with a percentage of anaesthetic vapour according to a predetermined setting of the unit.
  • This vaporising unit is preferably of a nonspillable type, such as is disclosed in our prior British Patent Specification No. 968,- 054, dated Feb. 4, 1963, where there is an inlet 2 and an outlet 3 on opposite sides of the unit for a through flow of air and/ or oxygen and a rotatable plate valve 4,
  • the plate valve 4 When the plate valve 4 is turned it initially opens the aforesaid inlet to and outlet from the vaporising chamber or chambers.
  • the said plate valve has an upstanding rib 10 which is rotated in relation to superposed inclined facings 11 which causes the through passage for air and/ or oxygen to be variable.
  • the vaporising unit 1 is connected to an oxygen economiser receptacle 12 which has a pendant partly dividing plate 13 between an air inlet 14 (which may be controllable) and an outlet 15 connected by pipe 16 to the inlet to the vaporiser unit.
  • An inlet 17 for oxygen is linked to the said connection pipe 16 and a flow meter 18 is provided to give visible indication of the inlet of oxygen from a supply source.
  • This inflow of oxygen is controlled by a fine control valve 19 and a feed pipe 20 is provided for connection to a cylinder and fitted with an oxygen reducing valve.
  • the vaporiser unit 1 is connected by pipe 21 from its outlet 3 to a connection unit 22 embodying a direction flap valve 23 for controlling the inflow of air-oxygenanaesthetic-vapour through an inlet port 24 with a further inlet port 25 spaced away therefrom and controlled by a nonreturn flap valve 26.
  • the two valves are thin plates or discs resting by gravity on the port seatings to be raised by a patients inspiration or bellows induced pressure. Stop means 23a and 26a restrict the opening movements of the valves. Between these two valves there is a third port 27 connected to a manually operated bel lows unit 28. From this connection unit there is.
  • the unit 22 has a passageway 35 leading from the second flexible tube inlet 33 to a port 36 normally closed by an expiratory valve 37 over which there is mounted a spring returned plunger 38 connected to a flexible diaphragm 39.
  • a passage 40 leads from a chamber 41 above the diaphragm to the connection 42 between the said unit 22 and the bellows 28 and there is an expiratory port 43 in the wall of the connection unit from the region where the expiratory valve mounted.
  • a patient can have normal breathing and draw in air and/0r oxygen, or anaesthetic vapour mixed with air and/or oxygen. Expiration can take place normally through the second flexible tume 32 to the expiratory port 43 by expired air pressure opening the expiratory valve 37. Should it be necessary, breathing can be assisted by operation of the bellows unit 28. It will be appreciated that as a patient inspires air can be drawn through the oxygen economiser 12, through the vaporiser unit 1 and the two nonreturn spaced apart valves 23, 26, and thence through the first flexible tube 30 to the facepiece 31. As the patient expires the second nonreturn valve 26 will close and thus all expiration will pass out through the aforesaid valve 37 to the expiratory port 43.
  • the fine control valve 19 is opened to admit oxygen from a supply source at a desired rate.
  • the oxygen flow Will be charging the economiser unit itself, and this will discharge any existing air in the economiser through the air inlet 14.
  • the percentage of oxygen received by the patient will be dependent on the rate of flow of oxygen according to the setting of its inlet control valve 19 and the patients minute volume.
  • minute volume is meant lung capacity per one minute. It will be understood that the percentage of oxygen a patient receives will vary according to the patients own minute volume which of course differs with different patients.
  • the bellows 28 can be operated and this will draw air and/ or oxygen and/or vaporised anaesthetic into it and then cause it to be forced through the second of the nonreturn valves 26 and the first flexible tube 30 to the facepiece 31.
  • the said second nonreturn valve 26 prevents any air being drawn from the patients lung.
  • Operation of the bellows which causes the pressure in a patients lungs to be raised causes a pressure to be transmitted to the aforesaid chamber 41 in the connection unit 22 behind the flexible diaphragm 39. Pressure on the diaphragm causes the plunger 38 to be forced down on to the expiratory valve 37 to hold it closed against any escape to atmosphere during the period when there is ejection into the patients lungs.
  • As the bellows are expanded pressure on the said diaphragm will be immediately released to release the expiratory valve and thus allow passive expiration to atmosphere from the patients lungs.
  • the above apparatus may be mounted on a base plate which may have gripping means and rubber feet.
  • a carrier case may be provided.
  • the apparatus may be on a trolley or be otherwise movable.
  • the vaporising unit may be of the nonspillable type and include a drainage outlet.
  • the invention provides at least two important features, i.e., automatic loading and unloading of the expiratory valve by the bellows created pressure, and economy in or full benefit of pure oxygen provided in the system through the fiowmeter.
  • a portable anaesthetic apparatus including in combination:
  • valve-controllable volatile anaesthetic vaporiser having an inlet and an outlet
  • an oxygen economiser reservoir having a high region air inlet-exhaust port and a high region outlet;
  • twin vertically spaced-apart lightweight plate valve members controlling said two flow passage ports in said valve control unit and leading to said face mask;
  • valve control unit a diaphragm in said valve control unit
  • an expiration valve which normally closes said expiration port, said diaphragm controlling said expiration valve.
  • valve members are gravity closed flap valves resting on said ports with stop means to restrict their opening movements.
  • valve control unit includes two tubular connection elements, one of said elements being an outlet for valve controlled air/oxygen and anaesthetic vapour and the other element leading to said valve controlled expiration port, and a pair of flexible tubes adapted to be removably attached to said connection elements, said tubes being joined together at their other ends and to a patients face mask.

Landscapes

  • 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)
US460681A 1964-06-09 1965-06-02 Volatile anaesthetic vaporising apparatus Expired - Lifetime US3399673A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23825/64A GB1071659A (en) 1964-06-09 1964-06-09 Improvements in or relating to volatile anaesthetic vaporising apparatus

Publications (1)

Publication Number Publication Date
US3399673A true US3399673A (en) 1968-09-03

Family

ID=10201922

Family Applications (1)

Application Number Title Priority Date Filing Date
US460681A Expired - Lifetime US3399673A (en) 1964-06-09 1965-06-02 Volatile anaesthetic vaporising apparatus

Country Status (6)

Country Link
US (1) US3399673A (xx)
DE (1) DE1491668B1 (xx)
FR (1) FR1437051A (xx)
GB (1) GB1071659A (xx)
NL (1) NL6507351A (xx)
SE (1) SE309469B (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4671953A (en) * 1985-05-01 1987-06-09 University Of Utah Research Foundation Methods and compositions for noninvasive administration of sedatives, analgesics, and anesthetics
US4863737A (en) * 1985-05-01 1989-09-05 University Of Utah Compositions and methods of manufacture of compressed powder medicaments
US4879997A (en) * 1988-04-07 1989-11-14 Bickford Allan M Anesthetic vaporizer
US4885173A (en) * 1985-05-01 1989-12-05 University Of Utah Methods and compositions for noninvasive dose-to-effect administration of drugs with cardiovascular or renal vascular activities
US5122127A (en) * 1985-05-01 1992-06-16 University Of Utah Apparatus and methods for use in administering medicaments by direct medicament contact to mucosal tissues
US5132114A (en) * 1985-05-01 1992-07-21 University Of Utah Research Foundation Compositions and methods of manufacture of compressed powder medicaments
US5288497A (en) * 1985-05-01 1994-02-22 The University Of Utah Compositions of oral dissolvable medicaments
US5855908A (en) * 1984-05-01 1999-01-05 University Of Utah Research Foundation Non-dissolvable drug-containing dosage-forms for use in the transmucosal delivery of a drug to a patient
US20080091155A1 (en) * 2006-10-12 2008-04-17 Jean Paul Matter Condom catheter

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572199A (en) * 1944-11-29 1951-10-23 John J Richards Apparatus for vaporizing liquid anesthetics
US3107689A (en) * 1960-07-22 1963-10-22 Drager Otto H Narcosis apparatus
US3126001A (en) * 1959-09-16 1964-03-24 Arrangement in respirators
US3128764A (en) * 1960-10-06 1964-04-14 Wilbur R Koehn Anesthesizing apparatus
US3162192A (en) * 1962-10-09 1964-12-22 Air Reduction Anaesthetic and analgesic inhalers

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2481142A (en) * 1945-04-13 1949-09-06 Mueller Co Corporation stop
DE968054C (de) * 1950-02-15 1958-01-09 Siemens Ag Batterieladegeraet
GB968054A (en) * 1962-02-15 1964-08-26 Cyprane Ltd Improvements in volatile anaesthetic vaporising apparatus
SE302660B (xx) * 1963-12-12 1968-07-29 Aga Ab

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2572199A (en) * 1944-11-29 1951-10-23 John J Richards Apparatus for vaporizing liquid anesthetics
US3126001A (en) * 1959-09-16 1964-03-24 Arrangement in respirators
US3107689A (en) * 1960-07-22 1963-10-22 Drager Otto H Narcosis apparatus
US3128764A (en) * 1960-10-06 1964-04-14 Wilbur R Koehn Anesthesizing apparatus
US3162192A (en) * 1962-10-09 1964-12-22 Air Reduction Anaesthetic and analgesic inhalers

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5855908A (en) * 1984-05-01 1999-01-05 University Of Utah Research Foundation Non-dissolvable drug-containing dosage-forms for use in the transmucosal delivery of a drug to a patient
US4671953A (en) * 1985-05-01 1987-06-09 University Of Utah Research Foundation Methods and compositions for noninvasive administration of sedatives, analgesics, and anesthetics
US4863737A (en) * 1985-05-01 1989-09-05 University Of Utah Compositions and methods of manufacture of compressed powder medicaments
US4885173A (en) * 1985-05-01 1989-12-05 University Of Utah Methods and compositions for noninvasive dose-to-effect administration of drugs with cardiovascular or renal vascular activities
US5122127A (en) * 1985-05-01 1992-06-16 University Of Utah Apparatus and methods for use in administering medicaments by direct medicament contact to mucosal tissues
US5132114A (en) * 1985-05-01 1992-07-21 University Of Utah Research Foundation Compositions and methods of manufacture of compressed powder medicaments
US5288497A (en) * 1985-05-01 1994-02-22 The University Of Utah Compositions of oral dissolvable medicaments
US5484602A (en) * 1985-05-01 1996-01-16 University Of Utah Research Foundation Methods and compositions for noninvasive dose-to-effect administration of drugs with cardiovascular or renal vascular activities
US4879997A (en) * 1988-04-07 1989-11-14 Bickford Allan M Anesthetic vaporizer
US20080091155A1 (en) * 2006-10-12 2008-04-17 Jean Paul Matter Condom catheter

Also Published As

Publication number Publication date
DE1491668B1 (de) 1971-10-21
GB1071659A (en) 1967-06-07
SE309469B (xx) 1969-03-24
NL6507351A (xx) 1965-12-10
FR1437051A (fr) 1966-04-29

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