. Essentials of laboratory diagnosis; designed for students and practitioners. ommonlyemployed has been to convey, by means of a tubular air system,the movements to be registered, to a recording tambour operatingagainst a suitable recording surface. Two tambours are usuallyemployed, with their levers placed one above the other, so thatsimultaneous records of these different movements, the apex beatand jugular pulse, can be readily reproduced. Jaquets polygraph consists of a metal frame to which isscrewed a cuff for attaching to the wrist. The sphygmographproper is attached to the frame. The wi
. Essentials of laboratory diagnosis; designed for students and practitioners. ommonlyemployed has been to convey, by means of a tubular air system,the movements to be registered, to a recording tambour operatingagainst a suitable recording surface. Two tambours are usuallyemployed, with their levers placed one above the other, so thatsimultaneous records of these different movements, the apex beatand jugular pulse, can be readily reproduced. Jaquets polygraph consists of a metal frame to which isscrewed a cuff for attaching to the wrist. The sphygmographproper is attached to the frame. The window cut out of the SPHYOMOnKAlMlY 123 frame Is fco be applied accurately along the radial artery (pre-viously marked out with a pencil)3 and the cuff then strappedaround the wrist quite tightly. The sphygmograph proper is setinto the frame by hooking into the hinge, and then the connec-tion of the two parts is effected by pressing down a1 and tighten-ing the screw. The pulse-registering apparatus consists of ashort, broad spring, which presses upon the artery and transmits. Fig. 29.—Jaquet Polygraph. its movements to the registering-needle by means of the leversystem. The screw also serves to adjust the registering-needleat the desired height upon the smoked strip of paper. By screw-ing it down, the spring is pressed against the artery. The screwis connected with an eccentric contrived to increase or diminishthe pressure upon the spring. The amount of pressure can bedetermined by noting the position of the figures upon the this mechanism the instrument can he adjusted with prac-tically equal pressure in each case, and taken away from theframe and reapplied in the same case, without alteration of thepressure. The paper is run through in a horizontal position and 124 SPHYGMOMAXOMETRY AXD SPHYGMOGRAPHY. it may be made of any convenient length. A little box containsthe clockwork which moves the strip of paper, which is con-trolled by pressing down on the lever. The ra
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisheretcetc, bookyear191
