The development of inhalation anaesthesia : with special reference to the years 1846-1900... / [Barbara M. Duncum].
- Duncum, Barbara M.
- Date:
- 1947
Licence: In copyright
Credit: The development of inhalation anaesthesia : with special reference to the years 1846-1900... / [Barbara M. Duncum]. Source: Wellcome Collection.
510/664 page 490
![Fig. 133.—COLEMAN'S APPARATUS FOR MAIN- TAINING NITROUS OXIDE ANAESTHESIA THROUGH THE NOSE DURING DENTAL OPERATIONS (1898) Anaesthesia was induced with the extra-large facepiece applied over the nose-piece and mouth. The patient is shown leaning back, his head sup- ported by the head-rest of the dental chair (seen behind his ear). The nose-piece is held in place by a strap passing round his head. From the nose-piece a flat tube passes back over the crown of the head to the reservoir bag, a small stopcock being interposed between the two. The function of the square piece of apparatus seen below the reservoir bag was not explained by Coleman, nor was the direction ' to blower ' ; ' to bottle ' means ' to cylinder assisted me in some experiments f1], suggests, to instruct the patient to breathe in at the nose and out at the mouth for a few times, and then to adapt the nose-piece, the same form of breathing being continued. An air-padded face-piece, rather larger than is 1 J. Blomfield has stated that ' although he described it in his book Hewitt never practised . . . the nasal administration of nitrous oxide, ... so keen was he on the constant use of the oral respiration in all inhalation anaesthesia'. (Brit. J. Anaesth., 1926-7, 4, 122.)](https://iiif.wellcomecollection.org/image/b20457200_0514.jp2/full/800%2C/0/default.jpg)
