The physician orders piperacillin 500 mg, IM, every 4 hours. The pharmacy sends you a 2g vial with directions to add 4mL of 0.9% sodium chloride solution for а concentration of 1g/2.5mL. After reconstitution, how many mL will the nurse administer per dose? Round to the tenths.
The Correct Answer is ["1.3"]
Desired dose: 500 mg
Available concentration: 1 g per 2.5 mL
Convert the desired dose from milligrams (mg) to grams (g) to match the concentration units.
Conversion factor: 1 g=1000 mg
Desired dose (g) = 500 mg/1000 mg/g
Desired dose (g) = 0.5 g.
Calculate the volume to administer in milliliters (mL).
Volume (mL) = Desired Dose (g) / Concentration (g/mL)
= 0.5 g/(1 g/2.5 mL)
= 0.5 g/0.4 g/mL
= 1.25 mL.
Round the answer to the nearest tenth.
= 1.3 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. "I get sharp pain in my lower abdomen usually starting soon after my period comes.": This statement suggests dysmenorrhea, which refers to painful menstruation caused by uterine contractions or conditions like endometriosis, not abnormal uterine bleeding.
B. "I get really irritable and moody about a week before my period.": These symptoms are consistent with premenstrual syndrome (PMS), a hormonal and emotional response that occurs before menstruation, not a bleeding irregularity.
C. "I've been having bleeding off and on that's irregular and sometimes heavy.": This supports abnormal uterine bleeding, which is characterized by irregular, unpredictable, or excessively heavy bleeding outside the normal menstrual cycle. Such bleeding often indicates hormonal imbalance, uterine pathology, or systemic conditions.
D. "My periods have been unusually short but heavy lately.": While this may suggest menorrhagia or other menstrual changes, it is still a cyclical pattern. Abnormal uterine bleeding typically involves unpredictable timing or prolonged irregular bleeding beyond normal cycles.
Correct Answer is A
Explanation
A. By the first birthday: The American Academy of Pediatric Dentistry recommends that a child’s first dental visit occur by age one or within six months of the first tooth eruption. Early dental care promotes proper oral hygiene, identifies early signs of decay, and helps parents learn preventive strategies.
B. By the second birthday: Waiting until the second birthday delays opportunities for early intervention and education on oral hygiene habits. Tooth decay can develop soon after eruption, so a visit by age one is preferred.
C. By entry into kindergarten: This age is far too late for a first dental visit. By this time, early childhood caries could already have developed, requiring more extensive dental care and increasing the risk of oral health complications.
D. By entry into first grade: A dental visit at this age misses critical preventive care in early childhood. The primary teeth play an important role in chewing, speech development, and alignment of permanent teeth, which need early monitoring.
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