Question 34

The days supply of the 10 mL vial of NPH U-100 insulin is 29 days.

A patient requiring 17 units of NPH U-100 insulin twice daily would use a total of 34 units per day. A 10 mL vial contains 1,000 units, thus providing a supply that lasts for 29 days.

A) 6

This option is incorrect as it significantly underestimates the total days supply. If the patient were to use 34 units per day, a 10 mL vial would last much longer than just 6 days.

B) 15

Option B is also incorrect. A supply of 15 days would imply a total usage of 510 units, which is less than what the vial can provide. Given the daily requirement of 34 units, this option does not reflect the accurate supply duration.

C) 29

This is the correct answer. The 10 mL vial contains 1,000 units of insulin, and with a daily requirement of 34 units (17 units b.i.d.), the total duration of the vial supply is approximately 29 days (1,000 units ÷ 34 units/day = 29.41 days, rounded down to 29 days).

D) 59

Option D is incorrect because it overestimates the days supply. If the vial lasted 59 days, it would mean the patient would only be using approximately 17 units every 2 days, which does not align with the prescribed dosage of 17 units b.i.d.

Conclusion

The correct answer, C, reflects the accurate calculation of how long the vial of NPH U-100 insulin will last based on the patient's dosing needs. All other options fail to account for the total units available in the vial and the required daily dosage, leading to incorrect assessments of the days supply.