Field Internship Student Data Acquisition Project. (FISDAP) Airway Practice Exam

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Which condition can lead to hypoxia due to obstructed blood flow?

Pneumothorax
Anemia
Cardiac tamponade
Blood loss

The correct answer is: Pneumothorax

Hypoxia due to obstructed blood flow can occur in conditions where there is a restriction or obstruction that prevents adequate blood delivery to the tissues. Cardiac tamponade is characterized by the accumulation of fluid in the pericardial sac surrounding the heart, which can compress the heart and impair its ability to pump blood effectively. As a result, cardiac output decreases, leading to reduced oxygen delivery to the body's tissues, which can cause hypoxia. This mechanism directly connects the obstruction of blood flow with the resultant hypoxic state. Pneumothorax primarily affects oxygenation through issues with ventilation rather than blood flow, while anemia involves a reduction in the number of red blood cells or hemoglobin, decreasing the oxygen-carrying capacity of the blood rather than obstructing blood flow itself. Blood loss certainly can lead to decreased oxygen delivery, but it does not specifically represent an obstruction of blood flow like cardiac tamponade does. Thus, the condition leading to hypoxia through obstructed blood flow is best exemplified by cardiac tamponade.