US1823767A - Apparatus for administering anesthetic and nutrient gas under pressure - Google Patents

Apparatus for administering anesthetic and nutrient gas under pressure Download PDF

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Publication number
US1823767A
US1823767A US263799A US26379928A US1823767A US 1823767 A US1823767 A US 1823767A US 263799 A US263799 A US 263799A US 26379928 A US26379928 A US 26379928A US 1823767 A US1823767 A US 1823767A
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United States
Prior art keywords
bell
gas
pressure
under pressure
gas under
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Expired - Lifetime
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US263799A
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English (en)
Inventor
Schroeder Hans Wilhe Christian
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.)
Draegerwerk AG and Co KGaA
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Draegerwerk AG and Co KGaA
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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. ventilators; Tracheal tubes
    • A61M16/10—Preparation of respiratory gases or vapours
    • A61M16/104—Preparation of respiratory gases or vapours specially adapted for anaesthetics

Definitions

  • the said drawbacks are re uced to a minimum.
  • This is secured by connecting the breathing circuit of the 40 device with the inside of a bell adjustably held in position within a liquid containing tank.
  • This bell is provided with a series of gas outlet openings, preferably distributed about the complete circumference of thebell at equal depths below the level of the liquid.
  • the bell may be adjustable as to height and provided with any kind of device for reading off the difference in level between the surface inside and that outside the bell.
  • the fluctuations of pressure with the new apparatus are so slight that they do not trouble the operator, and the consumption of gas may be reduced almost to the physiologically necessary amount.
  • the reduction of the gas consumption has the double advantage, on the one hand that the costs of the expensive gaseous anesthetics, for instance azotic protoxide or protoxide of nitrogen (laughing gas) are cut down to a minimum, and on the other hand that scarcely any anesthetic vapours are exhaled into the operating-room.
  • the lading of the air in the operating-room with narcotic vapours is very injurious to the attendants particularly when frequently repeated, an 5 this must be considered a great drawback of the pressure, narcosis a paratus requirin a large consum tion 0 gas. 1
  • gasometersf as a reservoir for anesthestics have been used heretofore by dentists in their practice.
  • an apparatus constructed according to this invention is provided with apressure regulator adapted to be used in connection with anesthesia devices with circulating breathing, though the invention is not restricted to such devices.
  • the circulatory breathing that is the re-inhaling of the unconsumed gases after exhaling and purifying from carbonic acid and water requires as is known a minimum amount of gas, namely scarcely two liters in the minute.
  • the vessel 1 contains the anesthetic gas and the vessel 2 oxygen.
  • the flow of both gases is'regulated by the valves 3 and 4 respectively.
  • the gases flow by, way of the pipes 5, 6 and 7 into the passage 8, and from there into the breathing bag 9 or to the mask 11 by way of the pipe or hose 10, respectively.
  • the exhaled gas passes through the flexible pipe 12 into the carbonic acid and water absorption cartridge 13 and hence through the pipe 14 back into the breathing bag 9.
  • the non-return-valves 15 (inhaling valve) and 16 (exhalingvalve) compel the gases to follow the breathing circuit in the manner described.
  • the vent cock 17 serves for' allowing any surplus of gas to escape from "the circulation outwardly by degrees or quickly.
  • the pressure regulating device by means of which the gas in the complete circulating system from the mask to the gas feed pipes 5 and 6 is held above atmospheric pressure and by which this pressure can be regulated and held substantially constant, comprises a vessel or tank 18 containing water or other liquid and a bell 19 firmly held therein, communicating by a flexible pipe 20 with the passage 8. By. way of the pipe 20 the narcotic gas passes into the bell provided with a plurality of perforations 21.
  • the water within the bell 19 will be displaced until gas freely escapes by way of the perforations 21 through the water in the tank 18.
  • the pressure of the gas within the bell which is also the pressure of the gas within the breathing circuit, is equal to the depth of immersion of the bell below the original level of the liquid in the tank plus the rise of that level due to the expulsion of water from within the bell by the pressure of the entering gas, in centimeters of water.
  • the bell 19 within the tank 18 is adjustable as to height.
  • the bell has a shaft or rod 23 clamped to a holder or bracket 22 by a set screw 24, which, when loosened, allows of the rod being slid up or down to adjust the bell to the desired height, whereupon the screw 24 may be screwed ,up to again firmly hold the bell in adjusted position.
  • Besides means may be provided such as a scale or the like, which allows of the levels within the tank 18 and within the bell 19 or the difference of the same to be read off.
  • the adjustability of the bell together with the means for allowing the levels to be read off constitute a good and simple pressure adjustin means.
  • the cross-section ⁇ of the bell 19 must be of the minimum area, such of 1000 square centimeters for example, which has given good results.
  • the amount of air inhaled and exhaled at a medial depth is about 500 com. and since the breathing bag 9 is generally fully inflated and only consequently to a certain elasticity is able to give up and take up a small amount of gas alternatively withdrawn and given back, the movement of the main amount of gas takes place within the pressure bell 19.
  • Owing to its large area the light liquid water flows quickly in and out.
  • the level of the water is advantageously subjected only to fluctuations of about 0.5 to 1 cm., since the fluctuations of pressure do not surpass this height. It has been proved that these fluctuationsof 0.5 to 1 cm. do not disturb the operations in the cavity of the chest nor those on the lungs.
  • the novel pressure regulator if desired may be connected with the pipe 14 or with the pipe above the cartridge instead of being connected with the passage 8 as shown. It may be used in connection with narcosis a paratus for liquid or fluid (vaporous or nebulous) narcotics or with combined ap aratus for gaseous and liquid narcotics, an also with narcosis apparatus without circulation.
  • An apparatus adapted for use in administering anesthetics in substantially gaseous state under pressure comprislng a breathing circuit, a supply of gas under pressure communicating with said breathing circuit, a bell of relatively large size connected with the breathing circuit, a liquid containing receptacle, and means for supporting saidbell Within the liquid containing receptacle in fixed relation with respect to said receptacle.

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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)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
US263799A 1927-05-24 1928-03-22 Apparatus for administering anesthetic and nutrient gas under pressure Expired - Lifetime US1823767A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DED0053118 1927-05-24

Publications (1)

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US1823767A true US1823767A (en) 1931-09-15

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US263799A Expired - Lifetime US1823767A (en) 1927-05-24 1928-03-22 Apparatus for administering anesthetic and nutrient gas under pressure

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US (1) US1823767A (en, 2012)
NL (1) NL23720C (en, 2012)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931357A (en) * 1955-08-25 1960-04-05 Arborelius Mans Mansson Breathing apparatus for submarine use with a storing sac and with controlling means for the gas supply
FR2168404A1 (en, 2012) * 1972-01-17 1973-08-31 Henkin Melvyn

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2931357A (en) * 1955-08-25 1960-04-05 Arborelius Mans Mansson Breathing apparatus for submarine use with a storing sac and with controlling means for the gas supply
FR2168404A1 (en, 2012) * 1972-01-17 1973-08-31 Henkin Melvyn
FR2309243A1 (fr) * 1972-01-17 1976-11-26 Henkin Melvyn Appareil destine a l'administration d'un anesthesique par inhalation

Also Published As

Publication number Publication date
NL23720C (en, 2012)

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