# Case Study: Automobile Collision Victim A 37-year-old woman is on a volume-cycled mechanical ventilator on a day when the barometric pressure is 745 mm Hg. The patient is receiving an Fl o 2 of 0.50. The following clinical data are obtained: Hb: 11g/dL ( Pa o 2 ) 60 mm Hg ( Sa o 2 = 90% ) P V ¯ o 2 35 mm Hg ( S V ¯ o 2 = 65% ) Pa c o 2 38 mm Hg Cardiac output: 6 L/min Based on this information, calculate the patient's A. Total oxygen delivery B. Arterial-venous oxygen content difference C. Intrapulmonary shunting D. Oxygen consumption E. Oxygen extraction ratio

BuyFind

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909
BuyFind

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
Publisher: Cengage Learning,
ISBN: 9781337794909

#### Solutions

Chapter
Section
Chapter 6, Problem 11RQ
Textbook Problem

## Case Study: Automobile Collision VictimA 37-year-old woman is on a volume-cycled mechanical ventilator on a day when the barometric pressure is 745 mm Hg. The patient is receiving an Fl o 2 of 0.50. The following clinical data are obtained: Hb:    11g/dL ( Pa o 2 )   60 mm Hg  ( Sa o 2  = 90% ) P V ¯ o 2   35 mm Hg  ( S V ¯ o 2  = 65% ) Pa c o 2   38 mm Hg Cardiac output: 6 L/minBased on this information, calculate the patient'sA. Total oxygen deliveryB. Arterial-venous oxygen content differenceC. Intrapulmonary shuntingD. Oxygen consumptionE. Oxygen extraction ratio

Expert Solution
Summary Introduction

Case summary: A 37-year-old woman met with an accident and is on a volume-cycled mechanical ventilator.

Characters in the case: A 37-year-old woman met with an accident.

Adequate information: The barometric pressure is 745 mm Hg. She was receiving FlO2 of 0.50.

To determine: The total oxygen delivery, the arterial venous content difference, the intrapulmonary shunting, oxygen consumption, and the oxygen extraction ratio.

### Explanation of Solution

Given information:

Cardiac output: 6 L/min

Hb: 11g/dL

PaO2: 60 mm Hg

Pv¯O2: 35 mm Hg

PaCO2: 38 mm Hg

With this information,

PAO2=(BP-PH2O) FlO2-PaCO2(1.25)=(745-47) 0.5 - 38(1.25)=(698)0.5 - 47.5=349 - 47.5=301.5

CcO2=(Hb×1.34)+(PAO2×0.003)=(11×1.34)+(301.5×0.003)=14.74+0.90=15.64

CaO2=(Hb×1.34×SaO2)+(PaO2×0.003)=(11×1.34×0.90)+(60×0.003)=13.266+0.18=13.44

Cv¯O2=(Hb×1.34×Sv¯O2)+(Pv¯O2×0.003)=(11×1.34×0.65)+(35×0.003)=9.581+0.105=9.686

A)

Totaloxygen delivery=QT×CaO2×10=6×13446×10=806

### Want to see the full answer?

Check out a sample textbook solution.See solution

### Want to see this answer and more?

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

See solution

#### Additional Science Textbook Solutions

Find more solutions based on key concepts
Show solutions
A deficiency of which mineral is a leading cause of mental retardation worldwide? a. iron b. iodine c. zinc d. ...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

What is a chemical reaction?

Biology: The Dynamic Science (MindTap Course List)

If Earth did not rotate, could you still define the ecliptic? Why or why not?

Horizons: Exploring the Universe (MindTap Course List)

Distinguish between scalar and vector quantities.

An Introduction to Physical Science

How can errors in the cell cycle lead to cancer in humans?

Human Heredity: Principles and Issues (MindTap Course List)

Classify catabolism and anabolism as synthetic or breakdown processes.

Chemistry for Today: General, Organic, and Biochemistry

Figure P29.71 shows a schematic representation of an apparatus that can he used to measure magnetic fields. A r...

Physics for Scientists and Engineers, Technology Update (No access codes included)

Define degeneracy in relation to stars in your own words.

Foundations of Astronomy (MindTap Course List)

Why do you think manatees evolved to be so much slower than other marine mammals?

Oceanography: An Invitation To Marine Science, Loose-leaf Versin