Lab Review Q's - Cardiovascular Responses to Submaximal Exercise

4 Pages

Biomedical Physio & Kines
Course Code
BPK 142
Craig Asmundson

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LAB 9CARDIOVASCULAR RESPONSES TO SUBMAXIMAL EXERCISE Describe the stepbystep procedure for measuring blood pressureMeasured using a sphygmomanometer BP cuffaneroid manometer together and a stethoscopeSit comfortably with a slightly flexed arm that is supported atlevel on a smooth surfaceNote any biological factors which alter BP such as anxiety meals tobacco exertion pain etcCircumference of upper arm25 cmchild size cuff 2535 cmadult cuff 35 cmlarge cuff1 Wrap the deflated cuff around the upper arm as shown in Figure 183 The cuffs have arrows labelled left or right which should be placed over the brachial artery of the appropriate arm 2 Pump up to 100 mm Hg Make sure the exhaust valve is closed by turning the screw clockwise until it is a little snug3 Locate the brachial artery in the antecubital space area on the forearm frontal to the elbow medial and underneath the biceps tendon Biceps tendon runs through the middle of the elbow joint on the anterior If you place your fingers on the medial edge of the biceps tendon and gently press down so that your fingers roll alongside and underneath the biceps tendon you should feel the brachial artery pulsing 4 Place your stethoscope firmly on this artery Since a pressure of 100 mm Hg is between the systolic and diastolic pressure points in most you should hear a distinct tapping sound The needle on the manometer will pulsate each time the heart beats and a spurt of blood goes through the artery 5 Once you have located the sounds at 100 mm Hg release the pressure to 0 by rotating the pressure control knob one or two complete counter clockwise turns6 With the stethoscope in place the pressure in the bag is raised approximately 30 mm Hg above the point at which the radial pulse disappears and then released at a rate of 23 mm Hg per second As the pressure falls the Korotkoff sounds become audible and pass through four phases as the pressure declines Phase I First appearance of faint clear tapping which gradually increases in intensity SYSTOLIC Phase II A swishing murmur Phase III Sounds are deeper and increase in intensity
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