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Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure 1.

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Presentation on theme: "Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure 1."— Presentation transcript:

1 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure 1

2 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure Blood pressure (BP) is the pressure or tension exerted on the arterial walls as blood pulsates through them (principal vital sign) Systolic blood pressure (SBP) – pressure exerted on the arteries during the contraction phase of the heartbeat. Diastolic blood pressure (DBP) – the resting pressure on the arteries as the heart relaxes between contractions. 2

3 3 Diastolic phase: heart relaxes, BP falls, heart fills with blood Systolic phase : heart contracts, BP rises, heart pumps blood out to the body

4 Reporting BP 4 Unit of measurement: Millimeters of mercury (mmHg) “LUB” “DUB”

5 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure (cont.) Classification of BP for Adults 5 CategorySystolic (mmHg) Diastolic (mmHg) Hypotension< 90<60 Normal and Prehypertension or Stage 1 Hypertension140 – 159Or Stage 2 Hypertension≥ 160or ≥ 100

6 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure (cont.) Sites for Blood Pressure Assessment Brachial artery – taken on the upper arm; most common site. Radial artery – taken on the lower arm; possible site for infants or clients who have very large upper arms. Popliteal artery– taken on the thigh. Dorsalis pedis and posterior tibial – taken on the lower leg. 6

7 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure (cont.) Equipment for Measuring Blood Pressure Blood pressure is measured using a sphygmomanometer, also called a BP cuff, or cuff. 7 Sounds like: SFIG-moh-m ə -NOM-i-ter

8 Copyright © The McGraw-Hill Companies, Inc. + Blood Pressure (cont.) Equipment for Measuring Blood Pressure Types of Sphygmomanometers Mercury – has a calibrated glass tube containing mercury. Aneroid – has a calibrated dial with a needle that points to numbers on the face of the dial. Electronic – uses a digital display and usually includes the pulse rate. 8 Mercury Aneroid Digital

9 Copyright © The McGraw-Hill Companies, Inc. + Homework: What factors affect HR & BP? Heart RateBlood Pressure

10 Copyright © The McGraw-Hill Companies, Inc. + Scientific Investigation Inquiry Question: Variables: Independent Variable: What will be manipulated? Dependent Variable: What will be affected? Control: What will we compare our results to? OR What will remain constant? 10

11 Copyright © The McGraw-Hill Companies, Inc. + Chapter 9 11


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