Areas where arteries are close to body surface Vital signs o Pulse blood

Areas where arteries are close to body surface vital

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Areas where arteries are close to body surface - Vital signs o Pulse, blood pressure, along with respiratory rate and body temperature Measuring blood pressure - Sphygmomanometer o Cuff around arm o Increase pressure in cuff to exceed systolic pressure in brachial artery o Pressure released slowly, listen for sounds of korotkoff Systolic pressure Pressure when sounds first occur as blood starts to spurt through artery Diastolic pressure Pressure when sounds disappear because artery no longer constricted , blood flowing freely
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Venous blood pressure - Venous valves o Prevent backflow of blood - Muscular pump o Contraction of skeletal muscles - Respiratory pump o Pressure changes during breathing, move blood toward heart by squeezing abdominal veins as thoracic veins expand - Sympathetic venoconstriction o Under sympathetic control; smooth muscles constrict pushing blood back toward heart Homeostatic imbalances o Hypertension o High blood pressure; elevated arterial pressure of >140/90 o Major cause of heart failure vascular disease renal failure and stroke o Hypotension o Low blood pressure below 90/60 o Varicose veins o Dilated and painful veins due to incompetent valves
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  • Spring '14
  • Anastasia

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