Anaesthesia in dental surgery / by Thomas D. Luke.

  • Luke, Thomas D. (Thomas Davey)
Date:
1906
Catalogue details

Licence: Public Domain Mark

Credit: Anaesthesia in dental surgery / by Thomas D. Luke. Source: Wellcome Collection.

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    and the complexion is growing dusky, the change being especially marked in people of fair com- plexion. The eyelids often twitch and become slightly separated. Third Stage-——The respiration now loses its regular character, and a curious and characteristic ‘snorting’ sound or stertor becomes noticeable. This is owing to some obstruction of the air-way, due to spasmodic contraction of the elevators of the larynx raising it towards the epiglottis and base of the tongue. This stertor will be always more marked if the patient’s head is at all extended, from the head-rest of the chair being too far back. The pulse is more rapid in character, running up to 100 or 120 in the minute, but is somewhat | less robust than in the second stage, and this is probably due to less blood reaching the left side of the heart. The muscles may be quite relaxed, and the arms fall limply if raised by the anesthetist, but some rigidity due to clonic or tonic spasm is more common if the gas is at all pushed. The spas- modic contractions are first noticed in the fingers, but they spread through the whole body, and may be so violent as to jerk the patient out of the chair. These movements are commonly known as jactitation. The facial muscles are in some caseS more