Ordered: Levothyroxine 150 mcg PO every day.
Available in bottle of suspension: 50 mcg/2 mL. Safe dose range: 5-6 mcg/kg/24 hr. Weight: 16.1 kg. Is this a safe dose for this patient?
Yes.
No.
The dose is too low for the client's weight.
The safe dose range is too narrow to determine.
The Correct Answer is A
Step 1 is: Calculate the minimum safe dose for 24 hours. 5 mcg/kg/24 hr × 16.1 kg = 80.5 mcg/24 hr.
Step 2 is: Calculate the maximum safe dose for 24 hours. 6 mcg/kg/24 hr × 16.1 kg = 96.6 mcg/24 hr.
Step 3 is: Compare the ordered dose to the safe range. The ordered dose is 150 mcg. The safe dose range is 80.5 mcg to 96.6 mcg. The ordered dose (150 mcg) is higher than the maximum safe dose (96.6 mcg). The ordered dose is NOT safe, so the initial answer is B. However, the question choices are A. Yes, B. No, C. The dose is too low for the client's weight, D. The safe dose range is too narrow to determine. Since the ordered dose is too high, the most accurate choice indicating it is NOT safe is "No".
Choice A rationale
The statement "Yes" is incorrect because the ordered dose of 150 mcg is significantly above the calculated safe range maximum of 96.6 mcg/24 hr. Administering an overdose of levothyroxine can lead to hyperthyroidism symptoms like tachycardia, heat intolerance, and anxiety, which is not a safe practice.
Choice B rationale
The statement "No" is correct because the ordered dose of 150 mcg is not within the therapeutic and safe range of 80.5 mcg to 96.6 mcg for a 16.1 kg child. Dosing levothyroxine accurately is crucial as it has a narrow therapeutic index, and excess dosage carries risks of serious cardiac side effects.
Choice C rationale
The statement "The dose is too low for the client's weight" is incorrect. The maximum safe dose is 96.6 mcg, and the ordered dose is 150 mcg, which makes the ordered dose too high, not too low. Giving an excessively high dose can cause adverse effects due to drug toxicity or an induced hypermetabolic state in the body systems.
Choice D rationale
The statement "The safe dose range is too narrow to determine" is incorrect. The safe dose range is clearly defined by the provided parameters as 80.5 mcg to 96.6 mcg/24 hr. The calculation provides a precise and sufficient range to determine that the ordered dose of 150 mcg is clearly unsafe and should be questioned by the nurse.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale
Pain assessment and management are important components of comprehensive care for any child, including those with HIV, especially following invasive procedures. However, the immediate physiological priority in managing a child with a chronic, immunosuppressive disease like HIV is maintaining immune function and suppressing viral replication through scheduled medication administration to prevent opportunistic infections.
Choice B rationale
Reviewing the absolute CD4+ T-lymphocyte count daily provides information about the degree of immunosuppression, as a normal count for a child varies by age but indicates immune health. While monitoring this parameter is vital for guiding treatment and prophylaxis, the active administration of antiretroviral medications and prophylactic antibiotics is the priority intervention to directly protect the child's immune system.
Choice C rationale
Administering prescribed antiretroviral medications (ART) and prophylactic antibiotics is the priority nursing intervention for a child with Human Immunodeficiency Virus (HIV) infection. Adherence to the ART regimen is critical for maintaining viral suppression, preventing disease progression to AIDS, and preserving the function of the child's severely compromised immune system, thereby reducing the risk of life-threatening opportunistic infections.
Choice D rationale
Assisting the child with daily activities, such as bathing, feeding, and mobility, is part of supportive care. This promotes comfort and physical well-being, especially during periods of illness or fatigue. However, this is a supportive measure, whereas administering medications directly addresses the underlying pathological process of immune deficiency, making medication administration the higher-priority intervention.
Correct Answer is B
Explanation
Choice A rationale
Drawing blood for a type and crossmatch is a crucial step in preparing for potential blood product administration, but it is not the first action in managing a pediatric patient presenting with signs of shock. Immediate priorities involve securing vascular access to deliver intravenous fluids and medications to reverse the state of hypoperfusion.
Choice B rationale
Establishing a suitable intravenous (IV) site is the paramount first step in managing a patient in shock, especially hypovolemic shock from a broken arm, as it allows for immediate, rapid volume replacement with isotonic crystalloid fluids. Restoring intravascular volume is the primary goal to improve perfusion, making vascular access the initial life-saving priority.
Choice C rationale
Hyperventilation, which refers to an increased rate and depth of breathing, can lead to respiratory alkalosis and is not generally indicated for managing hypovolemic shock due to trauma unless there is evidence of severe head injury with signs of cerebral herniation. The immediate treatment for hypovolemic shock is fluid resuscitation, not manipulating respiratory rate.
Choice D rationale
While providing analgesics is important for pain management, it is a secondary intervention. Administering oral analgesics to a patient who is showing signs of shock is dangerous because compromised circulation can impair absorption, and the priority must remain the stabilization of hemodynamic status through fluid resuscitation via IV access.
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