Nursing practice questions with comprehensive rationales
NurseDive Free Nursing Practice Question
A 2-week-old infant's head circumference is measured to be 37.2 cm. This measurement, converted to millimeters, is ______________mm.
This question is an excerpt from Nurse Dive's nursing test bank - Dosage calculation proctored exam (hellen fluid college). Take the full exam now
Full Explanation
Calculation:
- To convert centimeters (cm) to millimeters (mm), use the conversion factor of 10 mm per 1 cm.
1 cm = 10 mm
Measurement in mm = 37.2 cm × 10 mm/cm
= 372 mm.
Similar Questions
Ordered: Erythromycin Base Filmtab 250 mg #28; take 1 tab po q6h. What is the days' supply?
A. 5 days
B. 7 days
Calculation: Total tablets = 28 tablets. Calculate the number of tablets to be taken per day. The order is to take 1 tablet every 6 hours ("q6h"). Number of doses per day = 24 hours / 6 hours/dose = 4 doses per day. Since each dose is 1 tablet, the patient takes 4 tablets per day. Calculate the total days' supply. Days' supply = Total tablets / Tablets per day = 28 tablets / 4 tablets/day = 7 days.
C. 28 days
D. 4 days
Full Explanation
Calculation:
Total tablets = 28 tablets.
- Calculate the number of tablets to be taken per day.
The order is to take 1 tablet every 6 hours ("q6h").
Number of doses per day = 24 hours / 6 hours/dose
= 4 doses per day.
Since each dose is 1 tablet, the patient takes 4 tablets per day.
- Calculate the total days' supply.
Days' supply = Total tablets / Tablets per day
= 28 tablets / 4 tablets/day
= 7 days.
Which of the following syringes should be used to measure 60 units of insulin?
A. tuberculin syringe
tuberculin syringe: Tuberculin syringes are calibrated in milliliters (typically 1 mL total) and not in insulin units. Using them for insulin risks serious dosing errors due to miscalculation or misreading.
B. U-100, 50 unit capacity insulin syringe
U-100, 50 unit capacity insulin syringe: This syringe only holds up to 50 units of insulin. Since the ordered dose is 60 units, this syringe is not large enough and should not be used for this administration.
C. U-100, 100 unit capacity insulin syringe
U-100, 100 unit capacity insulin syringe: This is the correct syringe for giving 60 units of insulin. It is specifically calibrated for insulin dosing and can measure up to 100 units accurately and safely.
D. standard syringe
standard syringe: Standard syringes are usually marked in milliliters, not insulin units. Using them for insulin administration increases the risk of dosing errors and is not recommended for safety reasons.
Full Explanation
A. tuberculin syringe: Tuberculin syringes are calibrated in milliliters (typically 1 mL total) and not in insulin units. Using them for insulin risks serious dosing errors due to miscalculation or misreading.
B. U-100, 50 unit capacity insulin syringe: This syringe only holds up to 50 units of insulin. Since the ordered dose is 60 units, this syringe is not large enough and should not be used for this administration.
C. U-100, 100 unit capacity insulin syringe: This is the correct syringe for giving 60 units of insulin. It is specifically calibrated for insulin dosing and can measure up to 100 units accurately and safely.
D. standard syringe: Standard syringes are usually marked in milliliters, not insulin units. Using them for insulin administration increases the risk of dosing errors and is not recommended for safety reasons.
Calculate the amount to administer using a tuberculin syringe:
Ordered: Darbepoetin Alfa 12.5 mcg subcut weekly
On hand: See label
Full Explanation
Calculation:
Ordered dose: 12.5 mcg.
- Medication concentration from the label.
The label indicates a concentration of 40 mcg/1 mL or 40 mcg/mL.
- Calculate the volume to administer.
Volume (mL) = Desired Dose / Concentration
= 12.5 mcg / 40 mcg/mL
= 0.3125 mL.
- Rounded to the nearest hundredth
= 0.31 mL.