Oxygenation and Mechanisms of Hypoxemia article

Question 3

Oxygenation is the process of oxygen diffusing passively from the ______ to the ________ ________, where it binds to _______ in red blood cells or dissolves into the plasma.

Answer 3

• alveolus
• pulmonary capillary
• hemoglobin

Question 4

Oxygen delivery is the rate of oxygen transport from the ______ to the _______ tissues.

Answer 4

• lungs

- peripheral

Question 5

Oxygen consumption is the _______ at which oxygen is removed from the blood for use by the tissues.

Answer 5

• rate

Question 6

There are numerous ways to determine whether oxygenation is impaired and at risk of being insufficient to meet the metabolic requirements of the peripheral tissues. Name 4 of them.

Answer 6

• arterial oxygen saturation (SaO2)
• arterial oxygen tension (PaO2)
• alveolar to arterial (A-a) oxygen gradient
• PaO2/FiO2 ratio

Question 7

A low partial pressure of oxygen in the blood is termed _______.

Answer 7

• hypoxemia

Question 8

What are 5 causes of hypoxemia?

Answer 8

• hypoventilation
• ventilation-perfusion (V/Q) mismatch
• right-to-left shunts
• diffusion limitation
• reduced inspired oxygen tension