Drug X has a median lethal dose of 30 mg and a median effective dose of 10. Drug Y has a therapeutic index of 4, while drug Z has a therapeutic index of 3. Which statement is accurate based on this information?
A. Drugs X and Y are safer than drug Z.
B. The therapeutic index of drug X is 20.
C. Drug Y is the safest of the three.
D. Drug Z is the safest of the three.
Answer: C
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The nurse is caring for a patient who has just been admitted with atelectasis and anticipates which possible treatments for this patient? (Select all that apply.)
A) Chest tube B) Surgical removal of the affected lung C) Oxygen delivery D) Assisted ventilation E) Antianxiety medication
In appraising the growth and development potential of a preterm infant, nurses should:
1. tell parents their child won't catch up until about age 10 (girls) to 12 (boys). 2. correct for milestones such as motor competencies and vocalizations until the child is approximately 2½ years of age. 3. know that the greatest catch-up period is between 9 to 15 months postconceptual age. 4. know that the length and breadth of the trunk is the first part of the infant to ex-perience catch-up growth.
The first step to ensuring adequate intake of vitamins is to
a. use a daily multivitamin supplement. b. increase fortification of key foods in the food supply. c. target specific supplements for specific subgroups of the population. d. ensure that the diet includes a variety of foods from all of the food groups.
Which information should the nurse give to a child who is to have magnetic resonance imaging (MRI) of the brain?
a. "Your head will be restrained during the procedure." b. "You will have to drink a special fluid before the test." c. "You will have to lie flat after the test is finished." d. "You will have electrodes placed on your head with glue."