Responding to Connell's letter of March 9, 1939, Apgar reported that the anesthesia machines were working well since Connell's
modifications, answered his questions about the possible source of sparks, and commented on the need to use more common sense
in the operating room, to prevent accidental explosions.
Number of Image Pages:
1 (55,211 Bytes)
1939-03-21 (March 21, 1939)
Connell, Karl A.
Original Repository: Mount Holyoke College. Archives and Special Collections. Virginia Apgar Papers [MS 0504]
Reproduced with permission of Peter A. Apgar.
Medical Subject Headings (MeSH):
Establishing a New Specialty, 1938-1949
Letter from Karl A. Connell to Virginia Apgar (March 9, 1939)
Letter from Allen O. Whipple to Virginia Apgar (April 5, 1939)
Letter from Karl A. Connell to Virginia Apgar [ca. 9 April 1939]
Mr. Larson has fixed the shunt valve very satisfactorily, and they are all lubricated properly now. The temporary piston did
not happen to leak at all.
I hear of another explosion in New England this week. Your remarks on your work with intercoupling are most interesting, and
I trust you will find a satisfactory solution soon. I still feel however, that common sense plays the biggest part in preventing
explosions and that gas machines can never be made absolutely foolproof. Yesterday, we had a short circuit in the main floor
plug directly beneath the operating table, while open drop ether was being given (for student instruction). Fortunately there
was no fire, but why put floor plugs in that location? The hospital construction people are working hard on this problem,
and have numerous improvements up their sleeves.
As for your questions; yes, there was a metal neck on the Heidbrink bag, and I believe the touching of this piece to the machine
was the source of the spark. Why could not charge accumulate at the attachment of the rubber bag, and the metal neck, and
be the actual source of difference in potential?
The Stratosphere, and table models are all behaving well now, and after a breathing spell we shall consider replacing some