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Cardiopulmonary Anatomy & Physiolo...

7th Edition
Des Jardins + 1 other
ISBN: 9781337794909

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BuyFindarrow_forward

Cardiopulmonary Anatomy & Physiolo...

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

Case 1

5. Initially, it was not clear why the patient’s pH was so high. What were the two possible causes for the elevated pH?

A _____________________________

B______________________________

Summary Introduction

To review:

Initially, the reason was not clear for the high pH of the patient. Two possible causes for the elevated pH are to be discussed.

Introduction:

Carbon monoxide poisoning is caused by breathing in excessive amount of carbon monoxide (CO). Absorption of CO depends upon many factors, such as, minute ventilation, a period of the CO exposure, and the concentration of CO in the environment. These factors also decide the level of poisoning, whether it is acute or chronic.

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

Explanation

The patient, when brought in the emergency department, had a high pH (potential of hydrogen). There can be two reasons for the elevated pH:

(A) A low PaCO2 (arterial pressure of the carbon dioxide) due to a low level of carbon dioxide lowers the acidity, and thus, increases the pH. The PaCO2 is lowered down because of acute alveolar hyperventilation. It is caused by the delivery of less oxygen to the body.

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