US3313298A - Anesthesia vaporizer - Google Patents
Anesthesia vaporizer Download PDFInfo
- Publication number
- US3313298A US3313298A US377814A US37781464A US3313298A US 3313298 A US3313298 A US 3313298A US 377814 A US377814 A US 377814A US 37781464 A US37781464 A US 37781464A US 3313298 A US3313298 A US 3313298A
- Authority
- US
- United States
- Prior art keywords
- gas
- mixing chamber
- vaporizer
- pipe
- unit
- 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 - Lifetime
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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
- A61M16/10—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
- A61M16/18—Vaporising devices for anaesthetic preparations
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/10—Mixing gases with gases
- B01F23/12—Mixing gases with gases with vaporisation of a liquid
Definitions
- This invention relates to an anesthesia vaporizer and, in particular, to an anesthesia vaporizer which uses an anesthetic that is liquid at normal temperatures.
- anesthesia vaporizer in which an elongated tube 4is included in the feed -line to the vaporizer unit, which tube has such a length that Ia backow of gas through the vaporizer unit cannot reach a distributing chamber which is connected to a mixing chamber lby means of a bypass line.
- a tube is in the form of a coil.
- This invention is directed to a modied form of the apparatus described in my aforesaid application.
- the elongated pipe or pipe coil is inserted in the gas discharge line from the vaporizer unit, which line leads to a gas mixing chamber. It has been found that this arrangement will produce the same advantages as obtained by the apparatus of my aforesaid application.
- FIGURE 1 is a cross-sectional view through the apparatus.
- FIGURE 2 is a cross-sectional View of a modified form of ⁇ a portion of FIGURE 1.
- gas such as air, an ⁇ air mixture, a nutritive gas mixture with or without the addition of cyclopropane, laughing gas or the like, flows through the inlet feed line 3 into the liquid vaporizer unit 4.
- the gas mixed with the vaporized anesthetic leaves vaporizer unit 4 through outpuet pipe 5.
- Inlet feed line 3 is provided with a control valve 6 kand ya metering device 6a by means of which halothane can be mixed with the gas.
- outlet pipe 5 a relatively long piece of pipe in the form of a pipe coil 7 is inserted, and the outlet to this pipe coil is joined to the mixing chamber 8.
- Inlet feed line 3 is a irst pipe means for leading the gas to the vaporizer unit 4 and pipe 5 with coil 7 is a second pipe means for leading gas from a Vaporizer unit 4 to the mixing chamber 8.
- a third pipe means feeds air with or without admixed gas through valve 10 and metering devices 10a into line 11 Which extends into mixing chamber ⁇ 8.
- An outlet tube 12 leads from the mixing chamber to the patient.
- the coil 7 of FIGURE 1 can be replaced by a container 7a having interior baiiies 7-b which form an elongated passageway for the gas.
- a vaporizer for an anesthetic liquid at normal temperatures as used in an anesthesia apparatus, said vaporizer having a mixing chamber, a Vaporizer unit, first pipe means for leading intake gas from a gas supply into said unit, second pipe means for leading vaporized gas from said unit into said mixing chamber, outlet tube means for exhausting gas from said mixing chamber, and third pipe means joined to said mixing chamber for leading intake gas ⁇ directly from a gas supply into said mixing chamber, the improvement in which said second pipe means has a very long length relative to the distance traversed by the gas during normal gas backflow Ifrom said mixing chamber due to pressure pulsations caused by the breathing of the user of the vapon'zer.
- said second pipe means comprising a container, and Amberlite means in said container for forming an elongated gas passageway in said container.
Description
pn' lil, 3967 P. scHRElBl-:
ANESTHES IA VAPORI ZER Filed June 25, 1964 INV ENTOR Peer Joh/alaaf BY /Qm'y Maand ATTORNEYS United States Patent G 3,313,298 ANESTHESIA VAPORIZER Peter Schreiber, Lubeck, Germany, assigner to Otto Heinrich Drager, Lubeck, Germany Filed June 25, 1964, Ser. No. 377,814
Claims priority, application Germany, June 26, 1963,
2 Claims. (Ci. 12S-188) This invention relates to an anesthesia vaporizer and, in particular, to an anesthesia vaporizer which uses an anesthetic that is liquid at normal temperatures.
In my copending application Ser. No. 226,864, led Sept. 28, 1962, now Patent No. 3,158,154, an anesthesia vaporizer is disclosed in which an elongated tube 4is included in the feed -line to the vaporizer unit, which tube has such a length that Ia backow of gas through the vaporizer unit cannot reach a distributing chamber which is connected to a mixing chamber lby means of a bypass line. Such a tube is in the form of a coil.
This invention is directed to a modied form of the apparatus described in my aforesaid application. In this invention, the elongated pipe or pipe coil is inserted in the gas discharge line from the vaporizer unit, which line leads to a gas mixing chamber. It has been found that this arrangement will produce the same advantages as obtained by the apparatus of my aforesaid application.
The means by which the objects of the invention are obtained are described more fully with reference to the accompanying diagrammatic drawings in which:
FIGURE 1 is a cross-sectional view through the apparatus; and
FIGURE 2 is a cross-sectional View of a modified form of `a portion of FIGURE 1.
As shown in FIGURE 1, gas, such as air, an `air mixture, a nutritive gas mixture with or without the addition of cyclopropane, laughing gas or the like, flows through the inlet feed line 3 into the liquid vaporizer unit 4. The gas mixed with the vaporized anesthetic leaves vaporizer unit 4 through outpuet pipe 5. Inlet feed line 3 is provided with a control valve 6 kand ya metering device 6a by means of which halothane can be mixed with the gas. In outlet pipe 5, a relatively long piece of pipe in the form of a pipe coil 7 is inserted, and the outlet to this pipe coil is joined to the mixing chamber 8. Inlet feed line 3 is a irst pipe means for leading the gas to the vaporizer unit 4 and pipe 5 with coil 7 is a second pipe means for leading gas from a Vaporizer unit 4 to the mixing chamber 8. A third pipe means feeds air with or without admixed gas through valve 10 and metering devices 10a into line 11 Which extends into mixing chamber `8. An outlet tube 12 leads from the mixing chamber to the patient.
3,313,298 Patented Apr. 11, 1967 ICC 'In operation, the apparatus without pipe coil 7 receives pressure dilere'nces in vaporizer unit 4 to the same extent that occur in line 12 and mixing chamber 8 because of the breathing of the patient. These pressure differences in vaporizer chamber 13 can cause a backow of the gas from -chamber S to chamber 13 which is uncontrollable and results in that the gases in chamber 13 become mixed with more than the wanted amount of vaporized anesthetic, and these overmixed gases will then pass in uncontrollable amounts through mixing cham-ber `8 to the patient. An overdose of anesthetic gas is thus given the patient. By including the pipe coll 7 in the line between the vaporizer unit 4 and the mlxing chamber 8, the gas from the mixing chamber 8 cannot backow into the vaporizing chamber 13 during the maximum pressure differences occurring due to the breathing of the patient.
In FIGURE 2, the coil 7 of FIGURE 1 can be replaced by a container 7a having interior baiiies 7-b which form an elongated passageway for the gas.
Having now described the means by which the objects of the invention are obtained, I claim:
1. In a vaporizer for an anesthetic liquid at normal temperatures, as used in an anesthesia apparatus, said vaporizer having a mixing chamber, a Vaporizer unit, first pipe means for leading intake gas from a gas supply into said unit, second pipe means for leading vaporized gas from said unit into said mixing chamber, outlet tube means for exhausting gas from said mixing chamber, and third pipe means joined to said mixing chamber for leading intake gas `directly from a gas supply into said mixing chamber, the improvement in which said second pipe means has a very long length relative to the distance traversed by the gas during normal gas backflow Ifrom said mixing chamber due to pressure pulsations caused by the breathing of the user of the vapon'zer.
2. In a vaporizer `as in claim 1, said second pipe means comprising a container, and baie means in said container for forming an elongated gas passageway in said container.
References Cited by the Examiner UNITED STATES PATENTS 1,094,301 4/1914 Caine 12S-188 X 2,141,794 12/1938 King 12S- 188 2,890,696 6/1959 Morris 12S-188 3,128,764 4/1964 Koehn 12S-18S RICHARD A. GAUDET, Primary Examiner.
W. E. KAMM, Assistant Examiner.
Claims (1)
1. IN A VAPORIZER FOR AN ANESTHETIC LIQUID AT NORMAL TEMPERATURES, AS USED IN AN ANESTHESIA APPARATUS, SAID VAPORIZER HAVING A MIXINNG CHAMBER, A VAPORIZER UNIT, FIRST PIPE MEANS FOR LEADING INTAKE GAS FROM A GAS SUPPLY INTO SAID UNIT, SECOND PIPE MEANS FOR LEADING VAPORIZED GAS FROM SAID UNIT INTO SAID MIXING CHAMBER, OUTLET TUBE MEANS FOR EXHAUSTING GAS FROM SAID MIXING CHAMBER, AND THIRD PIPE MEANS JOINED TO SAID MIXING CHAMBER FOR LEADING INTAKE GAS DIRECTLY FROM A GAS SUPPLY INTO SAID MIXING CHAMBER, THE IMPROVEMENT IN WHICH SAID SECOND PIPE MEANS HAS A VERY LONG LENGTH RELATIVE TO THE DISTANCE TRAVERSED BY THE GAS DURINNG NORMAL GAS BACKFLOW FORM SAID MIXING CHAMBER DUE TO PRESSURE PULSATIONS CAUSED BY THE BREATHINNG OF THE USER OF THE VAPORIZER.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DED37494A DE1149860B (en) | 1961-11-18 | 1961-11-18 | Vaporizer for anesthesia machines with anesthetics that are liquid at normal temperature |
DED41839A DE1189235B (en) | 1961-11-18 | 1963-06-26 | Vaporizer for anesthesia machines with anesthetics that are liquid at normal temperature |
Publications (1)
Publication Number | Publication Date |
---|---|
US3313298A true US3313298A (en) | 1967-04-11 |
Family
ID=25971340
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US226864A Expired - Lifetime US3158154A (en) | 1961-11-18 | 1962-09-28 | Anesthesia vaporizer |
US377814A Expired - Lifetime US3313298A (en) | 1961-11-18 | 1964-06-25 | Anesthesia vaporizer |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US226864A Expired - Lifetime US3158154A (en) | 1961-11-18 | 1962-09-28 | Anesthesia vaporizer |
Country Status (4)
Country | Link |
---|---|
US (2) | US3158154A (en) |
DE (2) | DE1149860B (en) |
GB (1) | GB1001854A (en) |
NL (2) | NL124018C (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4091056A (en) * | 1972-06-28 | 1978-05-23 | Veikko Hamalainen | Method of vaporizing liquids |
US4879997A (en) * | 1988-04-07 | 1989-11-14 | Bickford Allan M | Anesthetic vaporizer |
US20100212668A1 (en) * | 2009-02-20 | 2010-08-26 | Baxter International Inc. | Inhaled anesthetic agent therapy and delivery system |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE302660B (en) * | 1963-12-12 | 1968-07-29 | Aga Ab | |
GB1156073A (en) * | 1966-12-17 | 1969-06-25 | Draegerwerk Ag | An Evaporator for Anaesthetic. |
SE450995B (en) * | 1986-01-21 | 1987-08-24 | Gambro Engstrom Ab | Dosing and gasification device, preferably intended for supply of anesthetic gas to a fresh gas stream in an anesthetic facility |
US5209225A (en) * | 1991-11-19 | 1993-05-11 | Glenn Joseph G | Flow through nebulizer |
US6189870B1 (en) * | 1997-07-01 | 2001-02-20 | Gordon Withall | Dual port medical oxygen humidifier |
SE9802957D0 (en) * | 1998-09-02 | 1998-09-02 | Siemens Elema Ab | Carburetor |
DE10039557C2 (en) * | 2000-08-12 | 2003-03-13 | Draeger Medical Ag | Pressure compensation device in an anesthetic evaporator |
GB2436947B (en) * | 2003-11-11 | 2009-03-25 | Richard John Fiedorowicz | Anaesthetic vaporiser |
DE102006044099B3 (en) * | 2006-09-20 | 2008-02-14 | Dräger Medical AG & Co. KG | Dosing device for anesthetic agent, comprises an evaporating chamber for the enrichment of part of the fresh gas with anesthetic agent and a dosing element with a gas inlet and a gas outlet with an adjusting means at the dosing element |
GB201115228D0 (en) | 2011-09-03 | 2011-10-19 | Secr Defence | Detection aid device |
DK2770047T3 (en) * | 2013-02-26 | 2015-06-29 | Ibidi Gmbh | Device for obtaining a gas |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1094301A (en) * | 1912-05-20 | 1914-04-21 | Mcdermott Surgical Instr Co Ltd | Apparatus for administering anesthetics. |
US2141794A (en) * | 1936-05-06 | 1938-12-27 | Frances King | Apparatus for administering anesthetics |
US2890696A (en) * | 1957-12-17 | 1959-06-16 | Lucien E Morris | Anesthesia apparatus |
US3128764A (en) * | 1960-10-06 | 1964-04-14 | Wilbur R Koehn | Anesthesizing apparatus |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1302133A (en) * | 1912-03-26 | 1919-04-29 | Albert Charles Clark | Anesthetic apparatus. |
US2042474A (en) * | 1930-03-10 | 1936-06-02 | Martha F Mckesson | Gas administering |
US2136245A (en) * | 1935-08-23 | 1938-11-08 | Ohio Chemical And Mfg Company | Ether vaporizer |
AT181355B (en) * | 1952-05-31 | 1955-03-10 | Norbert Dr Hammer | Apparatus for controllable inhalation of vapors developed from liquids or solids by the body heat of the hand surrounding the apparatus, in particular for self-analgesia using trichlorethylene |
US3018777A (en) * | 1958-12-17 | 1962-01-30 | Air Reduction | Anesthetic vaporizer and administering apparatus |
-
0
- NL NL290539D patent/NL290539A/xx unknown
- NL NL124018D patent/NL124018C/xx active
-
1961
- 1961-11-18 DE DED37494A patent/DE1149860B/en active Pending
-
1962
- 1962-09-28 US US226864A patent/US3158154A/en not_active Expired - Lifetime
- 1962-10-03 GB GB37465/62A patent/GB1001854A/en not_active Expired
-
1963
- 1963-06-26 DE DED41839A patent/DE1189235B/en active Pending
-
1964
- 1964-06-25 US US377814A patent/US3313298A/en not_active Expired - Lifetime
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1094301A (en) * | 1912-05-20 | 1914-04-21 | Mcdermott Surgical Instr Co Ltd | Apparatus for administering anesthetics. |
US2141794A (en) * | 1936-05-06 | 1938-12-27 | Frances King | Apparatus for administering anesthetics |
US2890696A (en) * | 1957-12-17 | 1959-06-16 | Lucien E Morris | Anesthesia apparatus |
US3128764A (en) * | 1960-10-06 | 1964-04-14 | Wilbur R Koehn | Anesthesizing apparatus |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4091056A (en) * | 1972-06-28 | 1978-05-23 | Veikko Hamalainen | Method of vaporizing liquids |
US4879997A (en) * | 1988-04-07 | 1989-11-14 | Bickford Allan M | Anesthetic vaporizer |
US20100212668A1 (en) * | 2009-02-20 | 2010-08-26 | Baxter International Inc. | Inhaled anesthetic agent therapy and delivery system |
US8267081B2 (en) | 2009-02-20 | 2012-09-18 | Baxter International Inc. | Inhaled anesthetic agent therapy and delivery system |
Also Published As
Publication number | Publication date |
---|---|
NL290539A (en) | |
GB1001854A (en) | 1965-08-18 |
NL124018C (en) | |
DE1189235B (en) | 1965-03-18 |
US3158154A (en) | 1964-11-24 |
DE1149860B (en) | 1963-06-06 |
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