Measuring Cardiovascular Parameters Objectives Practice measuring blood pressure

Question

Measuring Cardiovascular Parameters Objectives Practice measuring blood pressure using a sphygmomanometer Observe and measure the effect of a change in body position on blood pressure Learn how to estimate cardiac function measurements such as stroke volume, cardiac output and total peripheral resistance. Background In Part 1 of this lab we will look at the effect of body position on pressure using a sphygmomanometer and calculate a pulse pressure PP = systolic-diastolic or each body position. A pulse (or pulse pressure) is created when the increased arterial pressure of ventricular systole is followed by the rapid drop in arterial pressure during ventricular diastole. We can feel this pulse pressure by applying digital pressure to an artery as it a boney prominence such as the styloid process of the distal radius. The experimental design of this exercise will make use of a self-control; i.e. measure the blood pressure of each subject in both positions. Results will be analyzed as described below. resting blood pressure. You will measure blood following the standard procedure demonstrated in lab. You will also courses over In Part 2, you will measure your heart rate, body mass, and using your resting blood pressure from the first exercise, you will estimate several important cardiovascular parameters and compare them to'normal

Explanation / Answer

1. Hypothesis that the body posture has an impact on resting blood pressure is definetly supported by your data.

2. In a standing position, blood pressure tends to be lower than the lying position as there is VENOUS POOLING OF BLOOD into the lower limbs. The data that you have got (Mean +- SE) supports this notion.

3. you can measure this drop as supported by your data. Thie initial fall happens immediately once a person stands up from a lying position and later compensatory mechanisms try to stabilize the BP. Baroreceptors ( pressure receptors) fail to excite once the pooling occurs into lower limbs. This removes the inhibition of rostro ventro lateral medula (RVLM). As a result of this sympathetic mechanisms come into play leading to an INCREASED HEART RATE and INCREASED TOTAL PERIPHERAL RESISTANCE causing Tachycardia and incresed diastolic blood pressure

4. In this way systolic and diastolic BP is normalized

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