The patient is receiving nitroglycerin 55 mcg/min.
Available: Nitroglycerin in 5% Dextrose Injection 25 mg per 250 mL (100 mcg/mL)
What is the flow rate?
3 mL/hr
55 mL/hr
30 mL/hr
33 mL/hr
The Correct Answer is D
Convert the dosage to mcg per hour:
55 mcg/min × 60 min = 3300 mcg/hr
Determine the concentration of nitroglycerin available:
The concentration is 25 mg per 250 mL, which converts to 100 mcg/mL.
Calculate the flow rate in mL per hour using the dosage and concentration:
Flow rate (mL/hr)=(Dose (mcg/hr)/Concentration (mcg/mL))
(3300 mcg/hr100 mcg/mL)=33 mL/hr
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is ["A","B","D","E"]
Explanation
A) Subcutaneous:
The subcutaneous route involves administering medication into the layer of fat and connective tissue beneath the skin. This method is used for drugs that require slower absorption, such as insulin or certain vaccines.
B) Intramuscular:
The intramuscular route involves injecting medication directly into a muscle. This allows for faster absorption compared to subcutaneous injections, making it ideal for drugs that need to be absorbed quickly, such as vaccines or certain antibiotics.
C) Via a nasogastric tube:
Administering drugs via a nasogastric tube is not considered a parenteral route. The nasogastric (NG) tube delivers medications directly into the stomach via the gastrointestinal tract, which is not part of the parenteral system. Parenteral routes are those that bypass the digestive system, like injections.
D) Intradermal:
The intradermal route involves injecting medication just under the skin, in the dermis. This is typically used for allergy testing or tuberculosis screenings. It is a parenteral route because it bypasses the digestive system.
E) Intravenous:
The intravenous route involves injecting medication directly into a vein, offering rapid absorption and fast onset of action. This method is ideal for critical or emergency situations where immediate medication effects are necessary.
Correct Answer is A
Explanation
Given:
Ordered dose of Heparin: 18 units/kg/hr
Patient weight: 123 pounds
Concentration of Heparin: 25,000 units/250 mL (100 units/mL)
Step 1: Convert patient weight from pounds to kilograms:
1 pound (lb) = 0.453592 kilograms (kg)
Patient weight in kg = 123 lbs x 0.453592 kg/lb = 55.7923 kg
Step 2: Calculate the total dose of Heparin in units/hr:
Total dose (units/hr) = Ordered dose (units/kg/hr) x Patient weight (kg)
Total dose (units/hr) = 18 units/kg/hr x 55.7923 kg
Total dose (units/hr) = 1004.2614 units/hr
Step 3: Calculate the infusion rate in mL/hr:
Infusion rate (mL/hr) = Total dose (units/hr) / Concentration (units/mL)
Infusion rate (mL/hr) = 1004.2614 units/hr / 100 units/mL
Infusion rate (mL/hr) = 10.042614 mL/hr
Step 4: Round to the nearest tenths:
Infusion rate (mL/hr) ≈ 10.0 mL/hr
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