Why is it unsafe to use a tuberculin syringe to administer insulin?
Tuberculin syringes lack unit calibrations specific to insulin.
Tuberculin syringes do not have a needle attached.
Tuberculin syringes can only be used for intramuscular injections.
Tuberculin syringes are too large for insulin administration.
The Correct Answer is A
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.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is A
Explanation
A. 960 mL: One quart is approximately equal to 946 mL, which is commonly rounded to 960 mL for clinical calculations. This rounded value is frequently used in nursing practice to allow safe and practical fluid conversions.
B. 1,000 mL: One thousand milliliters is equivalent to 1 liter, not 1 quart. Although the volumes are close, they are not interchangeable in medication or fluid calculations.
C. 240 mL: Two hundred forty milliliters equals 1 cup, not 1 quart. This volume represents only one-fourth of a quart and is significantly lower than the correct conversion.
D. 480 mL: Four hundred eighty milliliters equals 2 cups or 1 pint. Since 1 quart equals 2 pints, this value represents only half of a quart.
Correct Answer is A
Explanation
Calculation:
- Set up the ratio and proportion
Available dose to volume = Desired dose to unknown volume
100 mg is to 10 mL as 400 mg is to X mL
- Cross multiply to solve for X
100 × X = 400 × 10
100X = 4000
X = 40 mL
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