The blood moved in a singleheartcontractionstretchesout the arteries, so that theirrecoil continues to push onthe blood, keeping it movingduringdiastoleMovementofbloodintoandout ofthearteriesduringthecardiaccycle
Movement of blood into and out of the arteries during the cardiac cycle. The blood moved in a single heart contraction stretches out the arteries, so that their recoil continues to push on the blood, keeping it moving during diastole
(2)Bloodpressure measurementDirect (invasive) measurement technique100mmHgpressure70pressureMovingsootedpaperFloatAnticoagulantsolutionMercuryMercurymanometer
Direct (invasive) measurement technique (2) Blood pressure measurement
Indirect(non-invasive)140measurementtechnigue12010080Cuff60pressure(mmHg)Firstsound40201201005FTime (sec)80Cuffpressure>120Muffling604020AuscultationPalpationCuffpressure<80InflatingbulbFleshandbones.comDaviesetal:HumanPhysiology
Indirect (non-invasive) measurement technique
SPHYGMOMANOMETRYArterial bloodpressureismeasured withasphygmomanometer(aninflatablecuffplusapressuregauge)andastethoscope.Theinflationpressure shown isforapersonwhosebloodpressureis120/80.(a)CuffpressureWhenthecuffisinflatedsothat>120mmHgitstopsarterialbloodflow,nosoundcanbeheardthroughastethoscopeplacedovertheInflatablebrachial artery distal to the cuff./cuffPressuregauge(b)CuffpressureKorotkoffsoundsarecreatedbybetween80andpulsatilebloodflowthroughtheStethoscope120mmHgcompressedartery福(c)CuffpressureBloodflowissilentwhenthe<80mmHgarteryisnolongercompressed.@2013Pearson Education, Inc
Copyright oThe McGraw-Hill Companies,Inc.Permission requiredfor reproduction or displsy(a)Systolicpressure(SP):theSystolicpressuremaximumarterialpressure120Aorticvalveclosurereached during the peak of(ventricularejection.MeanpressureDiastolicpressure(DP):the80Diastolicminimumarterialpressurejustpressurebefore ventricularejectionTimebegins.(b)200Pulse pressure (PP): thedifferencebetweenSPandDP150(BHnsSystolicpressureMeanarterialpressure(MAP):Meanpressure100the average pressure in theDiastolicpressurecardiac cycle50(=DP+1/3PP)0020406080Age (years)
Systolic pressure (SP): the maximum arterial pressure reached during the peak of ventricular ejection. Diastolic pressure (DP): the minimum arterial pressure just before ventricular ejection begins. Pulse pressure (PP): the difference between SP and DP. Mean arterial pressure (MAP): the average pressure in the cardiac cycle. (=DP+1/3PP)