File:The Journal of laboratory and clinical medicine (1915) (14594309327).jpg

Identifier: journaloflaborat01cent (find matches)
Title: The Journal of laboratory and clinical medicine
Year: 1915 (1910s)
Authors: Central Society for Clinical Research (U.S.)
Subjects: Biological Assay Diagnosis, Laboratory Disease Medicine Medicine Research
Publisher: St. Louis, C. V. Mosby
Contributing Library: Gerstein - University of Toronto
Digitizing Sponsor: University of Toronto

View Book Page: Book Viewer
About This Book: Catalog Entry
View All Images: All Images From Book
Click here to view book online to see this illustration in context in a browseable online version of this book.

Text Appearing Before Image:
for insufflation.The small shaft extends out sufficiently for the attachment of a brass slit-crank, to whichis attached a piston shaft. Fig. 2 shows a front view of the pulleys with hangers and slit-crank. Slit-Crank.—Tlie crank is 6/4 inches long, 34 *-i wide and >^ inch thick, with a slitin the middle, extending the full length of the crank, except for the closed ends. Shiftingthe piston shaft up and down the slit provides for almost any desired change in volume ofrespiration, ranging from 240 c.c. to 1,250 c.c. in our standard pump. .\ set-screw attach-ment on the piston shaft permits an adjustment of the respiratory volume at a momentsnotice by simply relaxing the belt, which is easily and readily secured by merely pushingthe table in the direction of the main shaft. By means of this slit crank, and a suitablyregulated T-tube in the tube leading to the trachea, we have successfully respired animalsranging from a small (250 gm.) guinea-pig to a 20 Kg. dog with the .same pump.
Text Appearing After Image:
Fig. 3.—Pump and valve (sectional view, scale about 1 to 4.6). a. valve. b. brass pin. c. air outlet, and rubber tubing attachment. d. iron elbow. e. projection with screw for fastening pump to front end of table./. brass union. g. patent brass disc (distal end of cylinder). h. cylinder. 1. piston-cup. y. leather washer. k. short piston tube. /. fork attachment to piston shaft. m. piston shaft. n. open proximal end of cylinder. Piston-Shaft.—This consists of a brass tube 40 inches long and ^ inch in diameter,with a set screw attachment to the slit-crank, and a fork attachment to the piston properwithin the cylinder of the pump (Fig. 3). Cr/t«c/c/-.--This consists of a brass tube 15 inches long and 3 inches in diameter,closed at the distal end with a patent brass disc, provided with a projection in the centerfor screwing to the table, and an outlet which communicates with the inside of the cylinderfor the escape of air. The proximal end of the cylinder is left open to permit freer

Note About Images