A patient with neuroleptic malignant syndrome has been prescribed dantrolene 1.5 mg/kg IV. The patient weighs 132 pounds.
The label on the 250 mg vial reads, “Reconstitute with 5 mL sterile water for injection, USP. Reconstitution yields 50 mg/mL.”. How many mL should the nurse administer?
The Correct Answer is ["1.80"]
Step 1 is to convert the patient’s weight from pounds to kilograms since the dosage is prescribed in mg/kg. We know that 1 kg is approximately 2.20462 pounds. So, the patient’s weight in kilograms is 132 pounds ÷ 2.20462 = 59.87 kg.
Step 2 is to calculate the total dosage of dantrolene needed. The prescribed dosage is 1.5 mg/kg. So, the total dosage is 1.5 mg/kg × 59.87 kg = 89.81 mg.
Step 3 is to calculate the volume of reconstituted dantrolene solution needed to provide the total dosage. The reconstituted solution has a concentration of 50 mg/mL. So, the volume needed is 89.81 mg ÷ 50 mg/mL = 1.80 mL.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A rationale
Osteoarthritis is a type of arthritis that occurs when the cartilage that cushions the ends of your bones in your joints gradually deteriorates. Osteoarthritis symptoms often develop slowly and worsen over time. They can include: Pain in the joint during or after use, or after periods of inactivity, Tenderness in the joint when you apply light pressure to or near it, Stiffness in the joint, that may be most noticeable when you wake up in the morning or after a period of inactivity, Loss of flexibility in the joint, Grating sensation or sound when you use the joint. But in this case, the client’s symptoms do not align with those of osteoarthritis.
Choice B rationale
Rheumatoid Arthritis is a chronic inflammatory disorder that can affect more than just your joints. In some people, the condition can damage a wide variety of body systems, including the skin, eyes, lungs, heart and blood vessels. Signs and symptoms of rheumatoid arthritis may include: Tender, warm, swollen joints, Joint stiffness that is usually worse in the mornings and after inactivity, Fatigue, fever and loss of appetite. The client’s symptoms align with those of Rheumatoid Arthritis.
Choice C rationale
Carpal Tunnel Syndrome is a condition that causes numbness, tingling and other symptoms in the hand and arm. Carpal tunnel syndrome is caused by a compressed nerve in the carpal tunnel, a narrow passageway on the palm side of your wrist. The anatomy of your wrist, health problems and possibly repetitive hand motions can contribute to carpal tunnel syndrome. But in this case, the client’s symptoms do not align with those of Carpal Tunnel Syndrome.
Choice D rationale
Gout is a common and complex form of arthritis that can affect anyone. It’s characterized by sudden, severe attacks of pain, swelling, redness and tenderness in the joints, often the joint at the base of the big toe. An attack of gout can occur suddenly, often waking you up in the middle of the night with the sensation that your big toe is on fire. The affected joint is hot, swollen and so tender that even the weight of the sheet on it may seem intolerable. But in this case, the client’s symptoms do not align with those of Gout.
Correct Answer is B
Explanation
Choice A rationale
While a high-calorie, high-protein diet can be beneficial for patients recovering from surgery or illness, it is not the immediate next step after collecting bone aspirate specimens for culture and sensitivity and applying a cast to a patient’s lower leg. The priority is to address the infection identified through the bone aspirate specimens.
Choice B rationale
Beginning parenteral antibiotic therapy is the appropriate next step after collecting bone aspirate specimens for culture and sensitivity in a patient with osteomyelitis. Osteomyelitis is an infection in the bone, and antibiotics are typically the first line of treatment. Therefore, this choice is the correct answer.
Choice C rationale
Administering antiemetic agents would be appropriate if the patient were experiencing nausea or vomiting. However, there is no indication in the question that the patient is experiencing these symptoms. Therefore, this choice is not the correct answer.
Choice D rationale
Bivalving the cast for distal compromise would be appropriate if there were signs of compromised circulation or nerve function below the level of the cast. However, there is no indication in the question that the patient is experiencing these issues. Therefore, this choice is not the correct answer.
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