A heparin infusion is prescribed for a client who weighs 220 pounds. After administering a bolus dose of 80 units/kg, the nurse calculates the infusion rate for the heparin solution at 18 units/kg/hour. The available solution is "Heparin Sodium 25,000 Units in 5% Dextrose Injection 250 mL". The nurse should program the infusion pump to deliver how many mL/hour? (Enter numeric value only. If rounding is required, round to the nearest whole number.)
The Correct Answer is ["18"]
Calculation:
- Convert the client's weight from pounds (lb) to kilograms (kg).
The client's weight is 220 lb.
Client weight (kg) = 220 lb/2.2 lb/kg
= 100 kg.
- Calculate the total heparin dose to be administered per hour (units/hr).
The ordered rate is 18 units/kg/hour.
Total dose rate (units/hr) = 18 units/kg/hour×100 kg
= 1800 units/hr.
- Determine the concentration of the available solution (units/mL).
Available solution is 25,000 units in 250 mL.
Concentration (units/mL) = 25,000 units/250 mL
= 100 units/mL.
- Calculate the infusion rate in milliliters per hour (mL/hr).
Infusion rate (mL/hr) = Total dose rate (units/hr)/Concentration (units/mL)
= 1800 units/hr/100 units/mL
= 18 mL/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
A. Administer prescribed PRN sleep medications: While adequate rest is important for postpartum recovery, it does not address the immediate risk to the client’s healing perineal tissue and comfort related to the fourth-degree laceration.
B. Encourage use of prescribed analgesic perineal sprays: Pain management is important for comfort and mobility, but it does not prevent complications such as wound disruption or trauma during defecation, which could impair healing.
C. Encourage breastfeeding to promote uterine involution: Breastfeeding supports uterine contraction and reduces postpartum bleeding, but it does not directly impact the care and protection of a severe perineal laceration.
D. Administer prescribed stool softener: Preventing straining during bowel movements is critical in promoting healing of a fourth-degree perineal laceration. Stool softeners reduce the risk of trauma to the repaired tissue, prevent pain, and minimize potential complications such as wound dehiscence.
Correct Answer is A
Explanation
A. Complete blood count: Zidovudine can cause bone marrow suppression, leading to thrombocytopenia. Pinpoint red spots, or petechiae, are a sign of low platelet count. A CBC is the most relevant test to evaluate for cytopenias and should be reported promptly to the provider.
B. Skin biopsy: A biopsy would help diagnose dermatologic conditions such as rashes, lesions, or malignancies, but petechiae are usually vascular in nature and related to platelet abnormalities.
C. Allergy test: Allergy testing evaluates hypersensitivity to specific allergens but is not relevant here. Petechiae are not typical of allergic reactions; instead, they reflect impaired clotting or low platelets.
D. Electromyography: EMG measures electrical activity in muscles to assess for neuromuscular disorders. It has no connection to the client’s presentation of petechiae and is unrelated to zidovudine’s known adverse effects.
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