Exam 5: Oxygenation Assessments

The respiratory therapist is reviewing a patient's electronic medical record to try to verify if the patient has tissue hypoxia. Which of the following laboratory values is MOST likely to correlate with tissue hypoxia?

An increased cardiac output causes the: 1) C(a-v)O₂ to decrease. 2) SvO₂ to increase. 3) total O₂ delivery to decrease. 4) O₂ ER to increase.

Oxygen consumption: 1) increases with exercise. 2) is the amount of oxygen used by the body. 3) is inversely related to carbon dioxide production. 4) is about 250 mL/min in the resting adult.

A patient has a chronic respiratory disorder and vasoconstriction of her pulmonary vascular system. What is the chief control over this vasoconstriction?

A condition that will cause anemic hypoxia is:

A condition that will cause hypoxic hypoxia is:

When a sample of arterial blood is analyzed for the pressure of oxygen (PaO₂), the value comes from the:

A sample of blood has been taken from a patient's pulmonary artery. What mixed venous oxygen saturation value (SvO₂) would indicate that the patient is normal?

Polycythemia is: 1) a condition of too many red blood cells. 2) a condition of too few red blood cells. 3) caused by lack of iron in the diet. 4) the body's response to chronic hypoxemia.

The respiratory therapist is evaluating a patient in the intensive care unit who shows signs of tissue hypoxia. Laboratory results reveal the following: HgB 14.8 grams, CaO₂ 19.6 vol. %, PaO₂ 102 mm Hg, a-v difference 9.8 vol. %, PvO₂ 24 mm Hg. Based on these results, which of the following types of hypoxia does this patient have?

A patient has been exposed to carbon monoxide during a house fire. An ABG result shows a normal PaO₂. How should the patient's PaO₂ value be interpreted?

A patient is mildly hypoxemic. Which of the following signs would the respiratory therapist expect to find in this patient?

A person's C(a-v)O₂ increases in all of the following situations EXCEPT: