blood pressure
DESCRIPTION
Blood Pressure. 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. - PowerPoint PPT PresentationTRANSCRIPT
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+Blood Pressure
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+ 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.
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Diastolic phase: heart relaxes, BP falls, heart fills with blood
Systolic phase : heart contracts, BP rises, heart pumps blood out to the body
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The average BP, due to the pumping by the heart and resistance in blood vessels decreases as the circulating blood moves away from the heart through the body. Gravity, valves in veins and pumping from contracting of skeletal muscles are some other influences on BP at various places in the body.
Reporting BP 5
Unit of measurement:Millimeters of mercury (mmHg)
12080
“LUB”
“DUB”
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+Blood Pressure (cont.)
Classification of BP for Adults
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Category Systolic (mmHg)
Diastolic (mmHg)
Hypotension < 90 <60
Normal 90 - 119 and 60 - 79
Prehypertension 120 - 139 or 80 - 89
Stage 1 Hypertension
140 – 159 Or 90 -99
Stage 2 Hypertension
≥ 160 or ≥ 100
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+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.
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+Blood Pressure (cont.)
Equipment for Measuring Blood Pressure Blood pressure is measured using a
sphygmomanometer, also called a BP cuff, or cuff.
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Sounds like: SFIG-moh-mə-NOM-i-ter
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+ 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.
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Mercury
Aneroid
Digital
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+ Homework:What factors affect HR & BP?
Heart Rate Blood Pressure
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+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?
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Chapter 9
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