12. The physician has ordered the patient to receive Heparin 20 u/kg/hr in a continuous IV infusion. The client weighs 195 pounds. Heparin is available in a premixed bag and is labeled as 25,000 units in 250 ml. Calculate how many ml/hr to set the IV pump. Round answer to nearest whole number.
The Correct Answer is ["18"]
To calculate the IV pump setting, first convert the patient's weight from pounds to kilograms, knowing that 1 kilogram equals 2.2 pounds. The patient weighs 195 pounds, which is approximately 88.64 kilograms (195 / 2.2). Next, calculate the total units of Heparin needed per hour by multiplying the patient's weight in kilograms by the dosage ordered: 20 units/kg/hr. So, 88.64 kg * 20 units/kg/hr equals 1,772.8 units/hr. Now, determine how many milliliters per hour this dosage requires. Since the premixed bag contains 25,000 units in 250 ml, there are 100 units per ml (25,000 units / 250 ml). Finally, divide the total units needed per hour by the concentration to find the volume needed per hour: 1,772.8 units/hr / 100 units/ml equals 17.728 ml/hr. Rounded to the nearest whole number, the IV pump should be set to 18 ml/hr.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. Overproduction of parathormone by the parathyroid gland is related to hyperparathyroidism, not Addison's disease.
B. Lack of insulin production by the pancreas is related to diabetes mellitus, not Addison's disease.
C. Addison's disease is caused by insufficient production of aldosterone and cortisol by the adrenal glands.
D. Overproduction of growth hormone by the pituitary gland is related to conditions like acromegaly, not Addison's disease.
Correct Answer is C
Explanation
A. Severe dehydration is not a typical concern when discontinuing prednisone.
B. Rebound pulmonary congestion is not a known risk of stopping prednisone suddenly.
C. Adrenocortical insufficiency can occur if prednisone is discontinued abruptly because the body needs time to resume normal cortisol production.
D. Hyperglycemia is a side effect of prednisone use but is not a concern when tapering off the medication.
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