. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . in the 10 mm. intervening between the readings,which made it possible that still larger waves might haveoccurred at some intermediate point. The error from this could 1 Howell, W. H., and Brush, C. B., Jr. A Critical Note upon Clinical Meth-ods of Measuring Blood-pressure. Boston Med. and Surg. Jour., 1901, , p. 146. THE VALIDITY OF THE SEVERAL C
. The clinical study of blood-pressure : a guide to the use of the sphygmomanometer in medical, surgical, and obstetrical practice, with a summary of the experimental and clinical facts relating to the blood-pressure in health and in disease . in the 10 mm. intervening between the readings,which made it possible that still larger waves might haveoccurred at some intermediate point. The error from this could 1 Howell, W. H., and Brush, C. B., Jr. A Critical Note upon Clinical Meth-ods of Measuring Blood-pressure. Boston Med. and Surg. Jour., 1901, , p. 146. THE VALIDITY OF THE SEVERAL CRITEEIA 71 not have exceeded 5 mm. Their results are shown in tabularform. Observa-tion. Experiment Diastolic pressure in riglitcarotid measured by then^lnimum manometer. mm. 111 139 83 Point at which the maxi-mum pulsations wereobtained in the left caro-tid as measured by thesphygmomanometer. 155 mm Hr 157 • (> (t 139 5 (C (( 81 (( it 85 « (C 109 (C t( 110 (( (( Animal bled profusely. The measurements were practically simultaneous and undereven conditions of anaesthesia, so that the pressure remainedconstant for considerable intervals. These figures, when. Fio. 19.—Apparatus of Walden foe veeifyino the okiteeion of maxohjm PULSATION of the AKTEKIAL WALL. AA=artery, tied, cut, and drawn through apparatus. BB^ small glass tubes inserted through stopper in larger tube^. C = tube of peritoneal membrane connecting the ends of BB. D = opening from outer tube leading to recording apparatus and manometer. E = opening connected with pressure flask. (From Howell and Brush.) coupled with Mossos simpler demonstration, are convincingas to the essential accuracy of the point of maximum amph-tude of pulsation as a guide to diastoUc arterial practical aspects of it alone remain to be touched onhere. 72 INDIRECT MEASUREMENT OF BLOOD-PRESSURE When used clinically, it is not possible to obtain tho
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Keywords: ., bookcentury1900, bookdecade1900, booksubjectbloodpr, bookyear1904
