Cronbach's alpha is used to determine which of the following instrument attributes?
A. stability
B. internal consistency
C. construct validity
D. sensitivity
ANS: B
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A patient has a blood serum drug level of 50 units/mL. The drug's half-life is 1 hour. If concentrations above 25 units/mL are toxic and no more of the drug is given, how long will it take for the blood level to reach the nontoxic range?
A) 30 minutes B) 1 hour C) 2 hours D) 3 hours
An increase in urinary frequency and leg cramps after the 36th week of pregnancy most likely indicates:
a. Onset of Braxton-Hicks contractions. b. Lightening. c. Breech presentation. d. Urinary tract infection.
The nurse is caring for an older patient who previously had a sacral pressure ulcer that has completely healed. What does the nurse recognize as a characteristic of the previously healed pressure ulcer?
1. Heal faster if reinjured 2. Break down faster if reinjured 3. Have no sensation in the injured area 4. Be at risk for infection even with intact skin
While counseling a health care worker who experienced an occupational exposure to HIV after being stuck by a scalpel used for surgery on a patient with HIV, the occupational health nurse discusses the "window period."
During this period of time, the body has not yet produced antibodies. The "window period" may have a duration of: A) 1 to 2 weeks after exposure B) 2 to 4 months after exposure C) 3 weeks to 6 months after exposure D) 2 to 5 years after exposure