What is the correct interpretation of the calibration lines on a U-100 insulin syringe?
Each small line indicates 5 units of insulin.
Each small line indicates 2 units of insulin.
Each small line indicates 1 unit of insulin.
Each small line indicates 0.5 units of insulin.
The Correct Answer is C
A. Each small line indicates 5 units of insulin: This is inaccurate because a U-100 insulin syringe has smaller graduations for precise dosing, and 5-unit increments would not allow accurate measurement of single-unit doses.
B. Each small line indicates 2 units of insulin: While closer, most U-100 syringes are marked in single-unit increments, making 2-unit interpretation insufficiently precise for safe insulin administration.
C. Each small line indicates 1 unit of insulin: Each small line represents 1 unit, allowing precise measurement of insulin doses. This accuracy is crucial for patient safety, especially when administering doses that are not multiples of five.
D. Each small line indicates 0.5 units of insulin: U-100 syringes are not typically marked in half-unit increments. Using this interpretation could lead to under- or overdosing, particularly in standard adult dosing.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
A. 27 gauge, 3/8 inch: This needle is too small in both gauge and length for an intramuscular injection in an adult. It is more appropriate for intradermal or subcutaneous injections and may not reach muscle tissue.
B. 22 gauge, 1.5 inch: A 22-gauge, 1.5-inch needle is commonly used for intramuscular injections in adults, especially in larger muscle groups such as the deltoid or ventrogluteal muscles. The gauge allows medication to flow easily while the length ensures proper muscle penetration.
C. 18 gauge, 1.5 inch: An 18-gauge needle is too large for routine intramuscular injections and is typically reserved for drawing up medications or administering blood products. Using this size could cause unnecessary tissue trauma and discomfort.
D. 25 gauge, 5/8 inch: This needle is generally used for subcutaneous injections and is too short to reliably reach muscle tissue in most adults. Inadequate depth may result in improper medication absorption.
Correct Answer is D
Explanation
Calculation:
- Available Concentration: 50 mg/mL
Ordered Dose: 125 mg
- Calculate the volume to administer
Volume to administer = Ordered Dose ÷ Concentration
Volume to administer = 125 ÷ 50
Volume to administer = 2.5 mL
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