You are reviewing a published research study on the clinical trial of a new medication
Using your knowledge of statistical analysis, it is important that the sample size in intervention trials be large enough for adequate statistical power to prevent a type II error. What is a type II error?
A) Occurs when the null hypothesis is rejected when it is true
B) Occurs when one rejects the alternative hypothesis when the alternative hypothesis is true
C) Occurs when the null hypothesis is accepted when it is false
D) Occurs when one accepts the alternative hypothesis when the alternative hypothesis is false
B
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A valid history and physical examination can serve to:
a. create higher health care costs. b. limit the indiscriminate use of diagnostics. c. threaten patient satisfaction. d. increase the risk of liability.
A client is considering the placement of a continent ileostomy. What should the nurse explain as an advantage of this type of surgery?
1. Gas may be expelled 2. An appliance is not needed 3. Additional surgery may be required 4. A drainage catheter needs to be inserted several times a day
Abnormal adherence of the placenta occurs for reasons unknown
Attempts to remove the placenta in the usual manner are unsuccessful, and laceration and perforation of the ute-rine wall may result, putting the woman at risk for severe PPH and infection. Placental adherence may be partial or complete. Which is not a recognized degree of placental at-tachment? a. Placenta accreta b. Placenta previa c. Placenta increta d. Placenta percreta
A client is admitted with a diagnosis of fever of unknown origin. The health care provider's orders include requests for blood and urine cultures, initiation of intravenous (IV) fluids, and IV antibiotics. Which actions must the nurse take FIRST?
a. Start antibiotics to ensure fastest treatment of underlying pathogen. b. Obtain cultures before initiating antibiotic therapy. c. The order of procedures does not matter. d. Establish an intravenous line.