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Physician's Order

The doctor orders Zithromax 500 mg orally, daily for a child who weighs 82 pounds. The safe dose range for this medication is 10-12 mg/kg/day. Zithromax is available in 250mg/tablets.

Is the order safe?

A.

False

B.

True

Answer and Explanation

The Correct Answer is A

  1. Convert weight to kilograms:
    82 lb ÷ 2.2 = 37.27 kg
  2. Calculate safe dose range:

Minimum dose: 10 mg × 37.27 kg = 372.7 mg/day

Maximum dose: 12 mg × 37.27 kg = 447.24 mg/day

  1. Compare with ordered dose:
    Ordered dose = 500 mg/day
    Safe range = 372.7 mg to 447.24 mg/day

→ 500 mg exceeds the maximum safe dose (447.24 mg)

Final Answer: No, the order is not safe.


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Related Questions

Correct Answer is C

Explanation

A. A greenstick fractureis a partial fracture common in children and does not break the skin, so it carries a low risk of infection.
B. Stress fracturesare tiny cracks in the bone from repetitive force and are closed fractures, not typically associated with infection risk.
C. A compound fracture(also called an open fracture) involves a break in the skin, exposing the bone and surrounding tissue to the external environment, which significantly increases the risk of infection.
D. A spiral fractureis caused by a twisting force and can be suspicious for abuse in children, but unless the skin is broken, it does not inherently pose a high risk for infection.

Correct Answer is C

Explanation

A. The ulnar nervepasses through Guyon’s canal, not the carpal tunnel.
B. The radial arteryis not involved in the carpal tunnel and is not compressed in CTS.
C. Carpal tunnel syndromeoccurs when the median nerveis compressed within the carpal tunnel, leading to symptoms like pain, tingling, numbness, and weakness, especially in the thumb, index, and middle fingers.
D. The brachial arteryruns higher in the arm and is not affectedby carpal tunnel compression.

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