Blood Pressure Outline
Blood Pressure Outline
1) Definition
i) The measurement of pressure of blood that is exerted on the walls of arteries during various stages of heart activity.
ii) Two different pressures
iii) Measures in milligrams of mercury
a) Systolic – pressure when the left ventricle of the heart is contracting and pushing against the wall of the arteries.
b) Normal Ranges – 100 – 140 mm Hg
c) Diastolic – pressure is the constant pressure of the walls of the arteries when the left ventricle is at rest, between contractions.
d) Normal Ranges - 60 – 90 mm Hg
iv) Pulse Pressure is the difference between systolic and diastolic. Indicates of the health and tone of the arterial walls.
v) Pressure is recorded in fractions. Systolic on top and Diastolic on bottom
a) Ex 120/90
2) Equipments used to measure BP
i) Stethoscope and sphygmomanometer
ii) Different types of sphygmomanometers
a) Mercury, Aneroid Gauge, and Electronic
1. Different Cuff Size according to the pt. If use the incorrect size, can obtain an inaccurate reading.
b) Important Factors to Remember when obtaining a B/P
1. Right Cuff
2. Clothing does not constrict arm and blood flow
3. Cuff in correct position and application
4. Gauge should be at heart level with palm of the hand up
5. Place stethoscope over the brachial artery at the antecubital space
6. Ear pieces should be pointed forward
7. Tubing not tangled
8. Cuff should be placed in the center of the upper arm and 1’ space above the antecubital area of the arm
9. Control the valve
10. Do not over inflate the cuff
4) Terminology of BP
i) Hypertension – high BP (140/90
Causes – stress, anxiety, obesity, high salt intake, age, kidney disease, thyroid deficiency and vascular conditions.
ii) Hypotension – low BP ↓ 90/60
Causes – heart failure, dehydration, burns, hemorrhage and shock
5) Factors that influence BP
i) Force of the heart
ii) Resistance of the arterial system
iii) Elasticity of the arteries
iv) Volume of the blood in the arteries
a.) Increase in BP – excitement, stimulant drugs, exercise, smoking and eating
b.) Decrease in BP – rest or sleep, depressant drugs, shock, blood loss, fasting
v) Pt position – lying, standing, sitting
Note to the teacher:
Demonstrate the use of the equipment to the class and or show video if available
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