An iatrogenic pneumothorax may be caused by all of the following EXCEPT:

a. positive-pressure mechanical ventilation.
b. pleural biopsy.
c. subclavian vein cannulation.
d. endotracheal intubation.


D
Endotracheal intubation does not pose a risk of pneumothorax. All of the other listed options can lead to medical procedure–related pneumothorax.

Health Professions

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Which of the following can be collected from a sample that is eliminated naturally?

A. Bone marrow B. Pus C. Sputum D. Blood

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What equation mathematically illustrates how the pH of a solution is influenced by the base to acid ratio?

A. H-H equation B. H-C equation C. A-H equation D. A-A equation

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Under what conditions will the gauge pressure of a cylinder of N2O accurately represent its con-tents?

1. When the liquid in the cylinder has completely vaporized 2. When the ambient temperature exceeds the critical temperature 3. When the filling density is less than 1.0 (water-filled) a. 1 and 2 only b. 1 and 3 only c. 2 only d. 1, 2, and 3

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The scrubbing of instruments and equipment with special brushes and detergent to remove blood, mucus, and other contaminants or media where pathogens can grow is called ________. 

Fill in the blank(s) with the appropriate word(s).

Health Professions