A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine (1885) (14594619550)

Identifier: manualofhumanphy01land (find matches)
Title: A manual of human physiology, including histology and microscopical anatomy, with special reference to the requirements of practical medicine
Year: 1885 (1880s)
Authors: Landois, L. (Leonard), 1837-1902 Stirling, William, 1851-1932
Subjects: Physiology Histology
Publisher: Philadelphia, P. Blakiston, Son, and Company
Contributing Library: MBLWHOI Library
Digitizing Sponsor: MBLWHOI Library



Text Appearing Before Image:
the heart is distended to itsmaximum, auxocardie.) Method.—The caido-pneumatic movements—i.e., the movement of the respira-tory gases dependent on the movements of the heart and great vessels—may bedemonstrated in animals and man. A manometric flame may be used. Insert onelimb of a Y-tube into the opened trachea of an animal, while the other limb passesto a small gas-jet, and connect the other tube with a gas-jet. It is clear that themovements of the heart will affect the column of gas, and thus affect the flame.Large animals previously curarised are best. It may also be done in man byinserting the tube into one nostril, while the other nostril and the mouth areclosed. (A simpler and less irritating plan is to till a wide curved glass-tube withtobacco smoke, and insert one end of the tube into one nostril while the other nostriland the mouth are closed. If the glottis be kept open, and respiration be stopped,then the movements of the column of smoke within the tube are obvious.)
Text Appearing After Image:
Fig. 36. Landois cardio-pueumograph, and the curves obtained therewith—A and B, fromman, 1 and 2, correspond to the periods of the first and second heart-sounds;C, from dog; D, method of using the apparatus. Cardio-Pneumograph.—Ceradini employed a special instrument, whileLandoia uses his cardio-pneumograph which consists of a tube (D), about one inch INFLUENCE OF RESPIRATORY PRESSURE ON THE HEART. Ill in diameter and six to eight inches iu length; the tube is bent at a right angle,and communicates with a small metal capsule about the size of a saucer (T), overwhich a membrane composed of collodion and castor oil is loosely stretched. Tothis membrane is attached a glass-rod (H) used as a writing-style, which recordsits movements on a glass-plate (S) moved by clock-work. A small valve (K) isplaced on the side of the tube (D), which enables the experimenter to breathewhen necessary. The tube (D) is held in an air-tight manner between the lips,the nostrils being closed, the glottis o