How much oxygen is contained in ambient air (room air)?
a. 15%
b. 21%
c. 30%
d. 42%
ANS: B
Room air is composed of 21% oxygen, trace amounts of carbon dioxide, and 79% nitrogen.
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The perinatal nurse describes normal maternal signs and symptoms associated with lightening to the prenatal class attendants. These signs and symptoms include which of the following? (Select all that apply.)
A. Difficulty breathing B. Increased urinary frequency C. Increased vaginal secretions D. Leg cramps E. Nausea and vomiting
When teaching a patient about home testing for occult blood, the nurse instructs the patient that:
a. positive results are indicative of bleeding. b. poultry and fish should be eaten before testing. c. testing should be done carefully during the menstrual cycle. d. two samples should be obtained from the same part of the stool specimen.
The nurse in the newborn nursery understands the importance of preventing the transmission of infection. Which of the following actions will help minimize the spread of organisms?
a. Contaminated nipples are washed carefully b. Clothing or blankets that touch the floor are dusted off before using c. Handwashing is encouraged d. Formula is prepared with the undivided attention of the staff
Absence of disease-producing organisms is
A. asepsis. B. sterilization. C. disinfection. D. nosocomial.