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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

The paradox in this case was that even though the patient's Pa o 2 and Pa o 2 increased in response to the increased ventilation- perfusion ratio, the actual amount of oxygen being transported (______ decreased; _______ increased;_____ remained the same) because of the (_______ increased;______ decreased) blood flow.

Summary Introduction

To review:

The given blank space in the statement, “The paradox in this case was that even though the patient’s PAO2 and Pao increased in response to the increased ventilation-perfusion ratio, the actual amount of oxygen being transported (________ decreased;__________ increased;_______ remained the same) because of the (__________ increased; ________ decreased) blood flow”.

Introduction:

The relationship between the amount of ventilation and the pulmonary capillary blood flow is known as the ventilation-perfusion ratio. Ideally, the lungs need to receive the same amount of capillary blood and ventilation. The overall ventilation-perfusion ratio is 0.8. The ratio depends on the ventilation and perfusion, and not just on the partial pressure of oxygen.

Explanation

In the given case, the rise in ventilation-perfusion ratio (V/Q) resulted in excessive blood loss due to trauma. Thus, the blood flow via the lungs decreased progressively and the alveolar ventilation became physiologically ineffective. The surgery reversed the pathological process.

The patient had suffered from an accident, which had led to a loss of a lot of blood. This has led to an increased ventilation-perfusion ratio because the amount of oxygen being transported to the tissues is decreased...

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