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Hypoxia and Anesthesia Techniques

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Questions and Answers

What is the main characteristic of hypoxic hypoxia?

Normal arterial pO2 with reduced oxygen carrying capacity of blood

Low arterial pO2 with reduced oxygen carrying capacity of blood

Low arterial pO2 with normal or elevated oxygen carrying capacity of blood (correct)

High arterial pO2 with normal oxygen carrying capacity of blood

What is the primary cause of anaemic hypoxia?

Venous arterial shunts

Low pO2 of inspired air

Defect in exchange of gases

Anemia (correct)

What distinguishes stagnant (ischaemic) hypoxia from other types?

Blood flow to the tissue is so low despite normal arterial pO2 and haemoglobin concentration (correct)

Complete absence of oxygen in the tissues

Normal arterial pO2 with reduced oxygen carrying capacity of blood

Low arterial pO2 with normal or elevated oxygen carrying capacity of blood

Which factor contributes to hypoxic hypoxia?

Decreased pulmonary ventilation Signup and view all the answers

What causes anaemic hypoxia?

Haemorrhage Signup and view all the answers

What is the primary characteristic of cyanosis?

Abnormal bluish discoloration of the skin and mucous membranes Signup and view all the answers

What does central cyanosis involve?

Reduced arterial oxygen saturation and highly vascularized tissues such as lips, hands, feet, tongue, and mucus membrane Signup and view all the answers

What distinguishes peripheral cyanosis from central cyanosis?

Increased oxygen extraction from peripheral blood Signup and view all the answers

What is the role of deoxygenated blood in differential cyanosis?

It increases in capillaries of the hands and feet Signup and view all the answers

What can be observed through the dermis in cases of cyanosis?

Blue blood due to thin overlying dermis Signup and view all the answers