A provider orders 40 units of U-100 insulin. Which syringe is most appropriate for this dose?
1 mL insulin syringe
Tuberculin syringe
0.3 mL insulin syringe
0.5 mL insulin syringe
The Correct Answer is D
A. 1 mL insulin syringe: While a 1 mL syringe can hold up to 100 units of U-100 insulin, using it for a 40-unit dose may reduce precision because the markings are more spread out, making it harder to measure accurately.
B. Tuberculin syringe: Tuberculin syringes are designed for very small volumes, usually in milliliters or fractions thereof, and are not calibrated in insulin units, making them inappropriate for accurate insulin dosing.
C. 0.3 mL insulin syringe: A 0.3 mL insulin syringe is typically used for small doses up to 30 units. Administering 40 units in this syringe would exceed its capacity and compromise safe and accurate dosing.
D. 0.5 mL insulin syringe: A 0.5 mL syringe is designed for doses up to 50 units of U-100 insulin. It allows for precise measurement of a 40-unit dose and reduces the risk of dosing errors, making it the most appropriate choice for safe administration.
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Related Questions
Correct Answer is A
Explanation
A. Tuberculin syringes lack unit calibrations specific to insulin: Tuberculin syringes are marked in milliliters, not insulin units, which makes them inappropriate for accurate insulin dosing. Using them increases the risk of dosing errors and potential hypoglycemia or hyperglycemia.
B. Tuberculin syringes do not have a needle attached: Tuberculin syringes typically come with a needle or have compatible needles available. Lack of needle is not the main safety concern for insulin administration.
C. Tuberculin syringes can only be used for intramuscular injections: Tuberculin syringes can be used for subcutaneous or intradermal injections; their limitation is not route but the calibration for precise dosing, which is unsuitable for insulin.
D. Tuberculin syringes are too large for insulin administration: Tuberculin syringes are small (1 mL), but size is not the main issue. The critical concern is that they are not calibrated in insulin units, making precise dosing unsafe.
Correct Answer is A
Explanation
A. The metric system is based on units of 10, simplifying calculations: The metric system’s base-10 structure allows for straightforward conversions between units (e.g., mg to g, mL to L), reducing calculation errors and improving accuracy in medication dosing and clinical measurements.
B. The metric system uses Roman numerals for clarity: The metric system does not use Roman numerals; it relies on standard numeric values and prefixes for measurements.
C. The metric system is only used in healthcare settings: The metric system is used universally in science, healthcare, and many other fields, not exclusively in healthcare.
D. The metric system eliminates the need for conversions: Conversions are still sometimes required within the metric system (e.g., mg to g), but they are simplified by the base-10 structure rather than eliminated entirely.
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