Nokea
You asked to obtain a measurement of serum sodium level in the hospital lab; you obtain a value of 125 mmol/L by repeating the test 5 times. The reference value of serum sodium at that lab is between 135-155 mmol/L. Your measurement is termed
- A. accurate but not precise
- B. precise but not accurate
- C. neither accurate nor precise
- D. both accurate and precise
Correct Answer: C
Rationale: The measurement is consistently low, indicating it is neither close to the true value (inaccurate) nor consistent with the reference range.
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The spouse of a client with gastric cancer expresses concern that the couple's children may develop this type of cancer when they're older. When reviewing risk factors for gastric cancer with the client and family, the nurse explains that a certain blood type increases the risk by 10%. The nurse is referring to:
- A. Type A
- B. Type AB
- C. Type B
- D. Type O
Correct Answer: A
Rationale: Among the different blood types, individuals with blood type A have been found to have a slightly higher risk of developing gastric cancer. Research has shown that individuals with blood type A are associated with a 10% increased risk of gastric cancer compared to other blood types. This information is important to consider when discussing potential risk factors for gastric cancer with clients and their families.
A 78 year old male has been working on his lawn for two days, although the temperature has been above 90 degree F. he has been on thiazide diuretics for hypertension. His lab values are K 3.7 mEq/L, Na 129 mEq/L, Ca 9 mg/dl, and Cl 95 mEq/L. What would be a priority action for this man?
- A. Make sure he drinks 8 glasses of water a day.
- B. Monitor for fatigue, muscle weakness, restlessness, and flushed skin
- C. Look for signs of hyperchloremia
- D. Observe for neurologic changes
Correct Answer: B
Rationale: The 78-year-old male in this scenario is at risk for electrolyte imbalances due to prolonged exposure to high temperatures while taking thiazide diuretics, commonly prescribed for hypertension. The low potassium level (K 3.7 mEq/L) and low sodium level (Na 129 mEq/L) in his lab results are indicative of potential electrolyte disturbances, especially considering his age and medication. These electrolyte imbalances can lead to symptoms like fatigue, muscle weakness, restlessness, and flushed skin, which are signs of hyponatremia and hypokalemia.
Incomplete development of teeth,bones, and ligaments is the result of:
- A. Congenital hip dysplasia
- B. Duchenne's muscular dystrophy
- C. Osteogenesis imperfecta
- D. Osteomyelitis
Correct Answer: C
Rationale: Osteogenesis imperfecta, also known as brittle bone disease, is a genetic disorder that affects collagen production, leading to brittle and easily fractured bones. In addition to bone fragility, individuals with osteogenesis imperfecta may also experience teeth abnormalities such as dentinogenesis imperfecta (discolored and weakened teeth) and ligament laxity due to the improper development of connective tissues. This incomplete development of teeth, bones, and ligaments is a characteristic feature of osteogenesis imperfecta, making it the correct choice in this scenario. Congenital hip dysplasia, Duchenne's muscular dystrophy, and osteomyelitis do not typically involve the same constellation of symptoms related to teeth, bones, and ligaments seen in osteogenesis imperfecta.
A 3-week-old neonate is brought to the emergency department because of a three-day history of intermittent vomiting. His mother reports that he has not urinated for eight hours. On physical examination, his eyes are sunken. Which of the following will MOST likely require correction before surgery is performed?
- A. Hypochloremia
- B. Hyperkalemia
- C. Hypernatremia
- D. N/A
Correct Answer: A
Rationale: Hypochloremia is often associated with dehydration and metabolic alkalosis, which may need correction before surgery.
The LEAST important advice for a 2-month-old baby with excessive crying is
- A. master the situation in relaxed manner
- B. adhere to precry cues
- C. change milk formula
- D. avoid sensory overstimulation
Correct Answer: C
Rationale: Changing formula is less critical if the baby is gaining weight adequately.