lab 3 quiz

diastole
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Terms in this set (15)
diastole
relaxing and filling
diastole pressure
minimum pressure within the arteries when blood is draining off into the rest of the vessels
systole
contraction and emptying
systolic pressure
maximum pressure exerted in the arteries when blood is ejected into them
ventricular contraction
contraction of vesicles pushes blood into elastic arteries, causing them to STRETCH
ventricular relaxation
elastic recoil in the arteries maintains driving pressure during ventricular diastole
pulse pressure
systolic pressure - diastolic pressure
mean arterial pressure
diastolic pressure + 1/3 pulse pressure
4 arteries for HR
brachial, radial, carotid and femoral
BP by PALPATION
-locate radial pulse
-inflate cuff until pulse dissapates
-slowly deflate cuff
-note BP when pulse returns -- this is SYSTOLIC BP

2 trials per person, both at rest
BP by AUSCULTATION-locate brachial pulse point -place stethoscope on pp, knobs of stethoscope facing your nose -close valve and inflate to 160mmHg -slowly release and listen for first korotkoff sound (listen for turbulent flow) -continue releasing pressure until sound fades -- this is DIASTOLIC BP 4 trials: 3 at rest, 1 post exercise take subjects pulse after each auscultation BP trial using RADIAL pulse for heart raterecord BP using odd or even #'s?EVENsystemic circulation pressurespressure waves created by ventricular contraction travel into the blood vessels pressure in the arterial side of the circulation cycles but the pressure waves diminish in amplitude with distance and disappear at the capillariesWhy is mean arterial pressure not equal to (systolic pressure - diastolic pressure)/2?its not a true average of DP AND SP: -- heart spends more time in diastole than systole, therefore MAP is slightly lower than a true averagematerials for labuse: sphygmamanometer (inflatable cuff) and stethoscope