Ether Apparatus, Wilson and Pinsonís, steel, nickel-plated complete with rubber tubing, attachment for the mask, filling funnel,
The "Bomb" Ether Apparatus.
(a) Ether in a closed space at a temperature of 100°C. is at a pressure of 97 lb. per square inch - its saturation vapour pressure at that temperature. With each fall of temperature there is a corresponding fall of pressure, until at its boiling point ( 35°C.) the effective pressure is nil.
(b) Ether as a liquid expands as the temperature rises, and as liquids are very incompressible, room must be left in the closed space for this expansion. A special filler plug (A) is fitted which ensures that such room is left.
A Safety Blow-off (C) is provided which prevents all possibility of the apparatus bursting.
It is intended for use with ether only.
The "bomb" gives a regular flow of warmed vapour which may be directed into lint, into a bag. in conjunction with a gas and oxygen apparatus, with air into the trachea through the nose into the naso-pharynx for dental work, or into the rectum.
Pass the small attachment (D) through two thicknesses of lint and secure with a safety pin. On the frame (e.g. Schimmelbuschís, or a similar type), first place a thin layer of gauze, to prevent dripping or spraying from the orifice of the metal mount, and over this the two thicknesses of lint. Attach the tubing from the bomb to the fitment. Use a face pad beneath the frame.
Place the bomb in a large bowl of boiling water.
To induce, open the valve very slowly, and gradually increase the amount to 15, 20, 25, 30, or even 40 on the dial, according to the patient. It will be found that after the induction appears complete the opening will have to remain at 15 or 20 for some little time (5 or 10 minutes). For maintenance, however, most patients take the valve open at about the 8, 9, or 10 graduations, and no further alteration will be needed until the advent of fresh boiling water.
When the hand can be borne comfortably in the water, pour in fresh boiling water. At the same time shut the valve down to half of what it was (as owing to increased pressure, the patient must not get more vapour).
The various openings of the valve mentioned vary a little in each individual apparatus.
Until well accustomed to using the apparatus, it is better to refill it before every case.
Note about prices:
British prices were in pounds (£ ), shillings (s.) and pence (d.). Each shilling is 1/20th of a pound, and each penny is 1/12 of a shilling or 1/240th of a pound. To convert to pounds, count each shilling as 0.05 pounds and each penny as 0.00417 pounds. Three pounds, twelve shillings and six pence is therefore 3.625 pounds.
In July 1996 one pound was worth 2.12 Canadian or 1.55 US dollars.