Preliminary notice on the treatment of emphysema of the lungs by artificial expiration / by J.B. Berkart.

  • Berkart, Joseph Isidor Bernard.
Date:
1871
Catalogue details

Licence: Public Domain Mark

Credit: Preliminary notice on the treatment of emphysema of the lungs by artificial expiration / by J.B. Berkart. Source: Wellcome Collection.

Provider: This material has been provided by The Royal College of Surgeons of England. The original may be consulted at The Royal College of Surgeons of England.

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    an India-rubber ovoid, holding about 15 cub. in., and is compressed one or more times at the end of each expiration. The mask, h, is carefully fitted, and attached firmly to the face. On inspiration taking place air enters at f and d ; upon expiring the valve, n, closes, while e and c open. The last feeble flutter of the valve, c, indicates the end of expiration ; then the spring valve, f, is closed with the finger, and the piston de- pressed the required amount, producing a further expiration. On removing the hand from the piston-rod, it rises as shown in the woodcut; and upon releasing the valve, f, inspiration again takes place. In using the instrument shown in Fig. 2, at the end of expiration the ovoid is rapidly compressed, and as rapidly released when artificial ex- piration is produced. This way may be repeated as required. The instruments are to be used twice a