A laboratory guide in physiology / by Winfield S. Hall ; with appendices on organization and equipment.

  • Hall, Winfield Scott, 1861-1942.
Date:
1897
Catalogue details

Licence: Public Domain Mark

Credit: A laboratory guide in physiology / by Winfield S. Hall ; with appendices on organization and equipment. Source: Wellcome Collection.

Provider: This material has been provided by the Augustus C. Long Health Sciences Library at Columbia University and Columbia University Libraries/Information Services, through the Medical Heritage Library. The original may be consulted at the the Augustus C. Long Health Sciences Library at Columbia University and Columbia University.

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    XXX. Respiratory pressure. /. Appliances.—Operating case; clippers; rabbit board; ether; ether cone; absorbent cotton; rabbit stethograph; kymograph; a small mercury manometer, to the piox- imal limb of which is attached a thick walled rubber tube, a piece of glass tubing for a mouthpiece; a screw clamp; chronograph; two recording tambours; rabbit. 2. Preparation.—Fix and anaesthetize the rabbit, and clip the ventral surface of the neck. Join up the manometer as shown in Fig. 23. j. Operation.— Make a longitudinal incision over the trachea. Carefully pass a strong linen ligature under the trachea. Make a median ventral slit in the trachea anterior to the ligature. Pass through the slit the limb of the Y-tube marked 1. (Fig. 23.) Ligate. 4. Observations. a. Respiratory pressure. The pneumatogram. (1) After the ligature is tied how does the rabbit breathe? Are the thoracic and abdominal move- ments of respiration accompanied by other respira- tory movements? (2) With tube n (Fig. 23) open is there any variation of the mercury during respiration? (3) With a screw clamp slowly close tube n. As the resistance to the flow of air increases what change is noted in the manometer? (4) Quickly clamp tube n at end of expiration and carefully note the manometer reading. Is it posi- tive or negative?