A client is receiving an infusion of nitroglycerin 100 mg in 500 mL DW at 6 mL/hour. How many mcg/minute of nitroglycerin is infusing? (Enter numeric value only.)
The Correct Answer is ["20"]
Calculation:
- Identify the IV concentration and flow rate
IV Concentration: 100 mg in 500 mL: 100,000 mcg in 500 mL
Flow Rate: 6 mL/hr
- Calculate the amount of drug infused per hour
Drug per hour (mcg/hr) = (Total Drug ÷ Total Volume) × Flow Rate
Drug per hour = (100,000 ÷ 500) × 6
Drug per hour = 200 × 6 = 1,200 mcg/hr
- Convert mcg/hr to mcg/min
Drug per minute = 1,200 ÷ 60 = 20 mcg/min
= 20 mcg/min
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is D
Explanation
Rationale:
A. Breath sounds: Lung assessment is important during fluid resuscitation to monitor for fluid overload, especially in older adults or those with cardiac compromise. However, breath sounds do not determine whether potassium administration is safe. Potassium-related complications are not identified through respiratory assessment.
B. Blood pressure: Blood pressure reflects volume status and response to fluid therapy in DKA. Although hypotension supports the need for isotonic fluids, it does not assess renal ability to excrete potassium. Potassium administration decisions must be based on kidney function rather than hemodynamics alone.
C. Skin turgor: Skin turgor provides information about dehydration, which is common in DKA due to osmotic diuresis. While useful for overall assessment, it does not indicate renal perfusion or potassium excretion capacity. It is not sufficient to guide safe potassium replacement.
D. Urinary output: Adequate urine output confirms renal perfusion and the ability to excrete potassium. Potassium chloride must not be administered unless urine output is established, as impaired excretion can lead to life-threatening hyperkalemia. This assessment is critical before initiating potassium-containing IV fluids.
Correct Answer is A
Explanation
Rationale:
A. Prepare the client to return to the operating room: Active hemorrhage one hour after hepatic surgery indicates uncontrolled bleeding, which requires immediate surgical intervention to identify and correct the source and prevent hypovolemic shock.
B. Assist with a diagnostic peritoneal lavage: This procedure is used to detect intra-abdominal bleeding in undiagnosed trauma, not when bleeding is already evident postoperatively from a surgical site.
C. Administer phytonadione: Vitamin K supports clotting factor synthesis but acts slowly and is ineffective for acute, life-threatening postoperative hemorrhage requiring rapid control.
D. Apply medical antishock trousers (MAST): MAST are not routinely used in postoperative hemorrhage and do not address the underlying surgical source of bleeding
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