22. A patient presents the following prescription: Humulin 70/30 U-100 Sig: 45 units subcutaneous q.a.m, and 55 units subcutaneous q.p.m. Disp: 30 days supply The number of 10 mL vials to be entered into the patient profile for the quantity ordered is:
Answer: C
Three 10 mL vials are needed for the prescribed insulin dosage.
To determine the number of 10 mL vials needed, we first calculate the total daily insulin requirement. The patient requires 45 units in the morning and 55 units in the evening, totaling 100 units per day. Since a 10 mL vial of Humulin 70/30 contains 1000 units, the daily requirement means the patient would use one vial in 10 days, thus needing three vials for a 30-day supply.
A) 1
Choosing one vial would not be sufficient, as it only contains 1000 units, which would cover the patient's insulin needs for just 10 days at 100 units per day. Therefore, this option does not meet the prescription requirements.
B) 2
Two vials would provide a total of 2000 units, which would last for 20 days at the prescribed rate of 100 units per day. While this is an improvement over one vial, it still falls short of the required supply for the entire 30 days.
C) 3
Three vials are necessary to meet the total requirement of 3000 units for 30 days at 100 units per day. This option accommodates the full dosage needed, ensuring that the patient has an adequate supply of insulin.
D) 4
Opting for four vials would provide 4000 units, which exceeds the total requirement of 3000 units for 30 days. Although this option would suffice, it is unnecessary and results in excess medication that the patient does not need.
Conclusion
The correct answer is three vials, as this precisely meets the patient's insulin requirements for a full 30-day supply. Options A and B do not provide enough units, while Option D offers an excess that is not needed, making Option C the most appropriate choice.