Presentation on theme: "Measuring Blood Pressure"— Presentation transcript:
1Measuring Blood Pressure Blood pressure is indicates your heart healthIt is determined by the contractions of the heartYour pressure varies depending on the condition of your heart and blood vesselsPressure is measured in millimeters of mercury (mm Hg)
2What is Blood PressureBlood pressure is the force that blood exerts against blood vessel walls.The pumping action of the heart generates the flowPressure occurs when the flow is met by resistance from blood vessel walls
3Laminar FlowBlood flows faster in the center of a blood vessel, because the blood near the sides are hitting the walls of the vessels.Is caused by the friction (resistance) between the blood and the vessel walls.
4Blood Pressure GraphPulse PressureSystolicDicrotic NotchDiastolicAverage PressureBy taking your pulse, you can feel that blood pressure fluctuation with each heartbeat.The pulse which you feel is actually a pressure wave that travels from your heart though your arteries
5Systolic PressureSystolic pressure is the maximum pressure exerted by the blood against the artery walls.It results when the ventricles contract.Normally, it measures 120 mm Hg.Systolic
6Dicrotic NotchThe Dicrotic Notch represents the interruption of blood flow due to the brief backflow of blood that closes the aortic semilunar valve when the ventricles relax.Dicrotic Notch
7Diastolic PressureDiastolic Pressure is the lowest pressure in the artery.It result when the ventricles are relaxed and is usually around 80 mm Hg.Diastolic
8Blood Pressure SoundsA cuff is inflated to constrict an artery so that no blood flows.As the cuff pressure is slowly released, but the artery is still partially constricted, blood flow begins again.Sounds can be heard because the blood flows violently causing audible sounds.When the artery is fully open, the blood flows freely and the sounds disappear.
9Checking Blood Pressure The first sounds that are heard indicate systolic pressure (top number).When the sounds stop, diastolic pressure has been reached (bottom number).Average blood pressure is:12080