File:American journal of physiology (1898) (14802192133).jpg

Identifier: americanjourn01ameruoft (find matches)
Title: American journal of physiology
Year: 1898 (1890s)
Authors: American Physiological Society (1887- ) American Physiological Society (1887- ). Abstracts of papers presented at the fall meeting American Physiological Society (1887- ). Proceedings
Subjects: Physiology Physiology
Publisher: (Bethesda, Md., etc.) American Physiological Society (etc.)
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

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arteries; and a tube was passed into the leftventricle through the auricular appendix. After washing out theaorta with normal saline solution to remove blood clots and air, thecat, upon its Czermak board, was placed in the inclined stand shownin Fig. I. At the readers right, in this figure, is seen the cat-boardresting upon an inclined supporting-frame. Two glass tubes are Distention of the Ventricle. 217 shown in front and to the left of the cat-board. The lower tube wasinserted in the right ventricle through the pulmonary artery, andcarried the outflow from the coronary vessels into a porcelain dish.The blood usually escaped from this tube in drops. Each drop, asit fell, struck on a thin aluminium plate of triangular shape, 17 mm.long and 14 mm. wide at the base, fastened on the lever of a Mareytambour. The plate was bent in such a way that the blood couldnot remain upon it, but ran off into the dish beneath; the impactof the falling drop caused an air wave in the tambour, which was
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Figure 2. transmitted to a very sensitive recording tambour, the lever of whichwrote on the smoked paper of the kymograph. The upper glasstube was inserted in the left ventricle through the left auricular ap-pendix and the mitral valve, and, being filled with normal salinesolution, as were the ventricles and the connecting tubes, transmittedthe changes of pressure in the ventricle to a Hiirthle membrane 2i8 Ida H. Hyde. manometer, the lever of which wrote on the smoked paper just abovethe writing of the drop-recorder. A side branch of the manometerled to the atmospheric air and served to place the ventricle atatmospheric pressure. For convenience, this tube has been drawnupright; in actual use, however, the mouth was brought down to thelevel of the ventricle ; the manometer was also at this level. A secondside branch led to a Mariotte flask filled with normal saline solution.By raising the flask the pressure in the ventricle could be increased,the amount of pressure being fully record

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