Blood Pressure Prelab

Measureme nt of Blood Pressure In Man PreLab Dr Sherwan Shal 2008

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Main Methods • Direct : More accurate, but complicated. • Indirect: Less accurate, easy to perform, sufficient.

Instruments (Sphygmomanometer) 1. Mercurial: Best, reliable, easy to mend, but large and heavy in weight. 3. Aneroid: less reliable, easy to handle and small and light in weight. 4. Electronic: easy to use, less reliable.

Mercurial Sphygmomanometer

Aneroid Sphygmomanometer

Electronic sphygmomanometer

Remember ; Pain and fear raise your BP !!

Methods For BP Estimation • Palpatory: Using only sphygmomanometer. • Auscultatory Method: Using Sphyg. + Stethoscope.

BP Measurement • "Blood pressure" – Systolic over diastolic – About 120/80 mmHg

• Sphygmomanometer – "Estimate of pressure" – Korotkoff sounds

Notes • If a vessel is completely blocked: No flow, no pulse and no sound. • If completely opened: There is flow, there is pulse but no sound. • If the artery is partially closed (obstructed) then: There is flow, pulse and sound. • Sound ONLY when there is partial

Stethoscope

Video of the BP Measurement

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Normal Blood Pressure • • • •

Depend on age and other factors: Young adult: Systolic 100-130 mmHg / Diastolic 60-90 mmHg Children: Systolic up to 100 and Diastolic upto 60 is normal. • Elderly: up to 130/90 mmHg ( Increased because of atherosclerosis) • Age + 100 is accepted for systolic , so , if some one is 50 years then systolic of 150 mmHg is normal. ( Diastolic upto 90 mmHg)

• Pulse pressure = Systolic–Diastolic • Mean arterial pressure (MAP) = Diastolic + 1/3 pulse p

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