Nokea
The most common site of osteosarcoma is:
- A. Femur
- B. Humerus
- C. Pelvis
- D. Skull
Correct Answer: A
Rationale: Osteosarcoma most commonly occurs in the long bones, particularly the femur, near the growth plates in children and adolescents.
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In embryology:
- A. Most defects occur with teratogens in the first 2 weeks post-conception
- B. The urachus becomes the median umbilical ligament
- C. The mesonephric duct becomes the male organs
- D. The thyroid develops from the floor of the primitive larynx
Correct Answer: B
Rationale: The urachus becomes the median umbilical ligament. Most defects occur after the first 2 weeks, and the thyroid develops from the floor of the pharynx.
In normal neonates:
- A. Extracellular fluid volume exceeds intracellular fluid volume
- B. In a term baby, plasma calcium levels exceed that of the mother
- C. Clamping the umbilical cord after cessation of cord pulsations increases the blood volume by 20% in the baby
- D. There are two arteries and one vein in the umbilical cord
Correct Answer: A
Rationale: In neonates, extracellular fluid volume is greater than intracellular fluid volume, reflecting the transition from intrauterine to extrauterine life.
A client with urolithiasis is preparing for discharge after lithotripsy. Which intervention should the nurse include in the client's postoperative discharge instructions?
- A. Prepare for transcutaneous pacing
- B. Deliver another defibrillator shock
- C. Administer IV Epinephrine per ACLS protocol
- D. Give IV dose of adenosine rapidly over 1-2 seconds
Correct Answer: D
Rationale: The client may experience arrhythmia, and the correct intervention is giving IV adenosine to slow the heart rate.
Which statement by the mother of a child with rheumatic fever (RF) indicates that she has an understanding of prevention for her other children?
- A. “Whenever one of them gets a sore throat, I will give that child an antibiotic.â€
- B. “There is no treatment since it is viral and must run its course.â€
- C. “If their culture is positive for group A streptococcus, I will give them a full course of their antibiotic.â€
- D. “If their culture is positive for staphylococcus A, I will give them a full course of their antibiotic.â€
Correct Answer: C
Rationale: A positive culture for group A streptococcus indicates a bacterial infection that requires a full course of antibiotics to prevent rheumatic fever, which can develop as a complication of untreated strep throat.
A 10-year-old has undergone a cardiac catheterization. At the end of the procedure, the nurse should first assess:
- A. Pain
- B. Pulses
- C. Hemoglobin and hematocrit levels
- D. Catheterization report
Correct Answer: B
Rationale: Checking pulsesâ€â€especially in the canulated extremityâ€â€assures perfusion to that extremity and is the priority postprocedure.