Question

Blood pressure is normally measured on the arm of a patient at a point that is nearly at the same height as the heart. If we were to measure the blood pressure on the lower leg of a standing patient, we would expect the measurement to be $$\begin{array}{l}{\text { A. lower than }} \\ {\text { B. higher than }} \\ {\text { C. the same as the measurement on the arm. }}\end{array}$$

Name: Problem 76, Chapter 13: College Physics
Uploaded: 2019-05-28T23:32:49-08:00
Duration: 1 min 10 s
Channel: Elan Stopnitzky
Description: Blood pressure is normally measured on the arm of a patient at a point that is nearly at the same height as the heart. If we were to measure the blood pressure on the lower leg of a standing patient, we would expect the measurement to be A. lower than B. higher than C. the same as the measurement on the arm.

   Blood pressure is normally measured on the arm of a patient at a point that is nearly at the same height as the heart. If we were to measure the blood pressure on the lower leg of a standing patient, we would expect the measurement to be 
$$\begin{array}{l}{\text { A. lower than }} \\ {\text { B. higher than }} \\ {\text { C. the same as the measurement on the arm. }}\end{array}$$

College Physics

Hugh D. Young 9th Edition

Chapter 13, Problem 76

Instant Answer

Solved by Expert Elan Stopnitzky

05/28/2019

Step 1

Step 1: We start by understanding that the total pressure in a fluid is given by the equation $P = P_0 + \rho gh$, where $P_0$ is the external pressure, $\rho$ is the density of the fluid, $g$ is the acceleration due to gravity, and $h$ is the depth in the fluid. Show more…

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Blood pressure is normally measured on the arm of a patient at a point that is nearly at the same height as the heart. If we were to measure the blood pressure on the lower leg of a standing patient, we would expect the measurement to be $$\begin{array}{l}{\text { A. lower than }} \\ {\text { B. higher than }} \\ {\text { C. the same as the measurement on the arm. }}\end{array}$$

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Key Concepts

Reference Level in Blood Pressure Measurements

Blood pressure measurements are typically taken at the level of the heart because the hydrostatic pressure contributions from gravity are minimized at this reference point. When measurements are taken at a different vertical level, such as the lower leg, the additional column of blood due to gravity increases the apparent pressure.

Hydrostatic Pressure

Hydrostatic pressure refers to the pressure exerted by a fluid at rest due to the force of gravity. As depth increases, the weight of the fluid above also increases, leading to a higher pressure. This principle is essential in understanding how pressure differences occur in fluids when there is a change in vertical height.

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