Air trapping is a major concern in patients with what diagnosis when using the assist-control mode?
a. Pneumonia
b. Chronic obstructive pulmonary disease (COPD)
c. Chest trauma
d. Neuromuscular disease
ANS: B
Patients with COPD are at special risk of air trapping in the assist-control mode, especially if they attempt to breathe at an increased rate.
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On the first day of examination of the primary plates of an eye culture from a 10-year-old female, the following results were noted:
BAP: moderate growth of small, alpha-hemolytic colonies showing some depressions in the center of each colony CHOC: moderate growth of small, colonies showing depressions in the center of each and surrounded by a green zone of discoloration MAC: no growth Results of testing of the alpha hemolytic colony: Gram stain: gram-positive cocci in pairs and short chains Catalase: no bubbles Optochin susceptibility: 16 mm Susceptibility testing on Mueller-Hinton with sheep blood agar against 1 ?g oxacillin: 17 mm Given the testing results above, this organism is possibly a A) penicillin-sensitive Streptococcus viridans. B) penicillin-resistant Streptococcus viridans. C) penicillin-resistant Streptococcus pneumoniae. D) penicillin-sensitive Streptococcus pneumoniae.
Which type of study investigates existing differences to determine possible causes?
A) Experimental B) Ex post facto C) Correlational D) Quasi-experimental E) None of the above