Chapter 4, Problem 1CAQ3

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

Chapter
Section

### Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909
Textbook Problem

# Case 1While the physician was treating the patient's failing heart, the respiratory therapist worked to offset the patient's poor oxygenation by increasing the patient's______, which is _______ of Fick's law.

Summary Introduction

To review:

The given blank space in the statement, “While the physician was treating the patient’s failing heart, the respiratory therapist worked to offset the patient’s poor oxygenation by increasing the patient’s ______, which is _____ of Fick’s law.”

Introduction:

In the given case, the patient suffers from pulmonary edema. This affected the thickness of alveolar space and capillary membrane thickness. The thickness of the membrane has increased. The increased thickness results in lowering the rate of diffusion of oxygen and carbon dioxide across the alveolar-capillary system. This is because according to Fick’s law, the thickness is indirectly related to the rate of diffusion.

Please refer to Clinical Application Case-1 for further information.

Explanation

When the patient is treated for his/her failing heart, it is also important for the therapist to improve the respiratory conditions of the patient. This is because the respiratory conditions of patients are extremely poor because of the poor rate of diffusion of oxygen. This diffusion is improved by the therapist by increasing the arterial partial pressure of oxygen (PAO2). This PAO2 is the P1 of Fickâ€™s law.

The increase in P1 results in improved rate of diffusion. This is because according to Fickâ€™s law, the difference in partial pressures across a membrane is P1â€“ P2, and it is directly related to the rate of the diffusion of gases...

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