US3446243A - Narcosis apparatus - Google Patents

Narcosis apparatus Download PDF

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Publication number
US3446243A
US3446243A US3446243DA US3446243A US 3446243 A US3446243 A US 3446243A US 3446243D A US3446243D A US 3446243DA US 3446243 A US3446243 A US 3446243A
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US
United States
Prior art keywords
gas
valve
pipe
vaporizer
atomizer
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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English (en)
Inventor
Josef Haupt
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Individual
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Individual
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Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3446243A publication Critical patent/US3446243A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87338—Flow passage with bypass
    • Y10T137/87346—Including mixing feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T137/00—Fluid handling
    • Y10T137/8593—Systems
    • Y10T137/87265—Dividing into parallel flow paths with recombining
    • Y10T137/87338—Flow passage with bypass
    • Y10T137/87362—Including cleaning, treating, or heat transfer feature

Definitions

  • This invention relates to an apparatus such as disclosed in U.S. Patent to Schreiber et al., No. 3,107,689, in which an anesthesia or narcosis apparatus has a pipe by-passing the atomizer with control valves in the by-pass pipe and the atomizer lines.
  • These valves are adjustable throttle valves, one of which is inserted in the by-pass pipe and one in the atomizer line.
  • Each valve is of the same size and has a length to width valve opening ratio of less than l0
  • the valve arrangement has the advantage in that the ratio of the mixture of intake gas and atomized gas remains substantially constant regardless of the change of gas velocity in either the vaporizer or the bypass pipe. This practically produces a laminar gas flow.
  • the resistance characteristics of the throttles is approximately linear.
  • any desired mixture of intake gas with atomized gas can be obtained by adjusting the throttle valves.
  • the throttle valves are conical valves with a conical valve head and a complementary valve seat.
  • the throttle means in the by-pass pipe is composed of a plurality of tubes connected in parallel with the ratio of the interior diameter of each tube to the length of the tube being less than 1:50.
  • This invention has the advantage that the resistance to the flow of gas in the by-pass pipe can be adjusted so low that the patient is able to inhale the gas from the atomizer by using his thorax muscles and without difl'iculty.
  • the two gas passageways principle is used in the construction of the atomizer of this invention.
  • a portion of the intake gas is moved through the atomizer on a first passageway.
  • a throttle means composed of a valve having a conical valve head and a complementary valve seat.
  • the head is adjustable so that the ratio of the width of the space between the valve head and valve seat to the length of the valve is less than 1:50. This results in a substantially laminar flow of gas through this valve.
  • the resistance characteristics are almost linear.
  • a considerably larger portion of the gas by-passes the atomizer chamber.
  • the throttle means in this second passageway in this invention is composed of a plurality of tubes in which the ratio of the interior diameter to the length of each tube is always less than 1:50.
  • the resistance characteristics of this bundle of tubes is almost linear.
  • the combination of the conical valve with the bundle of tubes results in that the distribution ratio of the gas during a change in the gas flow volume remains constant because each throttle means has substantially identical linear characteristics.
  • Gas such as air or mixtures of oxygen, laughing gas, or the like, enters intake pipe 1 and flows to the distributor chamber 2 of the atomizer. A portion of the gas flows through the inlet pipe 3 into the vaporizer 4 and out of the vaporizer through the vaporizer discharge pipe 5 in which is mounted a conical throttle valve 6 which has the opening width to length ratio heretofore described. The gas then flows in pipe 5 to a mixing chamber 7 and out of the vaporizer through the outlet pipe 8 to the lungs of the patient.
  • a conical throttle valve 6 which has the opening width to length ratio heretofore described.
  • a by-pass pipe 9 is joined with outlet pipe 8 at the mixing chamber 7.
  • Inserted in the bypass 9 is a bundle of tubes composed of a plurality of tubes connected in parallel to form a throttle means and with each tube having an interior diameter to length ratio less than 1:50. This corresponds to the valve opening to valve length ratio of conical valve 6 which is less than 1:50.
  • the tube bundle 10 and the valve 6 both have linear resistance characteristics. Consequently, when the volume of flow through the apparatus is changed, there is no change in the ratio expressed in percentages between the two gas flows. This has the advantage in that no change in the concentration of the narcosis or anesthesia gas takes place even though there may be a change in the velocity of gas flow because of the differences in less than atmospheric pressure produced by the thorax muscles of the patient. Also, the concentration of the vaporized gas can be adjusted by means of the valve 6 to any desired value.
  • a narcosis apparatus having a gas inlet pipe, 21 gas outlet pipe, a vaporizer by-pass pipe extending between said inlet and outlet pipes, at vaporizer discharge pipe connected between said vaporizer and said outlet pipe, and throttle means in each of said by-pass pipe and said discharge pipe, respectively, the improvement in which the throttle means in said by-pass pipe comprises a plurality of tubes connected in parallel with linear resistance characteristics, and each tube having a diameter to length ratio of less than 1:50.

Landscapes

  • Health & Medical Sciences (AREA)
  • Anesthesiology (AREA)
  • Emergency Medicine (AREA)
  • Pulmonology (AREA)
  • Engineering & Computer Science (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)
  • Heterocyclic Carbon Compounds Containing A Hetero Ring Having Nitrogen And Oxygen As The Only Ring Hetero Atoms (AREA)
  • Respiratory Apparatuses And Protective Means (AREA)
  • Accessories For Mixers (AREA)
US3446243D 1966-01-07 1966-12-12 Narcosis apparatus Expired - Lifetime US3446243A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED49090A DE1282857B (de) 1966-01-07 1966-01-07 Narkosegeraet mit einem dem Verdampfer parallel-geschalteten By-Pass

Publications (1)

Publication Number Publication Date
US3446243A true US3446243A (en) 1969-05-27

Family

ID=7051653

Family Applications (1)

Application Number Title Priority Date Filing Date
US3446243D Expired - Lifetime US3446243A (en) 1966-01-07 1966-12-12 Narcosis apparatus

Country Status (6)

Country Link
US (1) US3446243A (fr)
DE (1) DE1282857B (fr)
FR (1) FR1506118A (fr)
GB (1) GB1110143A (fr)
NL (1) NL6615543A (fr)
SE (1) SE320462B (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874010A (en) * 1988-05-26 1989-10-17 Siemens-Bendix Automotive Electronics Limited Heater control valve
US20190298965A1 (en) * 2016-07-14 2019-10-03 Drägerwerk AG & Co. KGaA Dispensing device for introducing an anesthetic into a breathing gas stream

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107689A (en) * 1960-07-22 1963-10-22 Drager Otto H Narcosis apparatus
US3257911A (en) * 1963-08-15 1966-06-28 Moog Inc Fluid powered servomechanism of a redundant, majority voting type

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1861618U (de) * 1960-07-22 1962-11-08 Draeger Werk Heinr & Bernh Dra Narkosegeraet.
DE1886611U (de) * 1961-11-18 1964-01-30 Draegerwerk Ag Verdampfer fuer narkosegeraete mit bei normaler temperatur fluessigen narkosemitteln.

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3107689A (en) * 1960-07-22 1963-10-22 Drager Otto H Narcosis apparatus
US3257911A (en) * 1963-08-15 1966-06-28 Moog Inc Fluid powered servomechanism of a redundant, majority voting type

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4874010A (en) * 1988-05-26 1989-10-17 Siemens-Bendix Automotive Electronics Limited Heater control valve
US20190298965A1 (en) * 2016-07-14 2019-10-03 Drägerwerk AG & Co. KGaA Dispensing device for introducing an anesthetic into a breathing gas stream
US11623064B2 (en) * 2016-07-14 2023-04-11 Drägerwerk AG & Co. KGaA Dispensing device for introducing an anesthetic into a breathing gas stream

Also Published As

Publication number Publication date
FR1506118A (fr) 1967-12-15
SE320462B (fr) 1970-02-09
DE1282857B (de) 1968-11-14
GB1110143A (en) 1968-04-18
NL6615543A (fr) 1967-07-10

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