A patient requires 40 units of NPH insulin and 10 units of regular insulin daily subcutaneously. What is the correct sequence when mixing insulins? a. Inject air into the regular insulin vial and...

A patient requires 40 units of NPH insulin and 10 units of
regular insulin daily subcutaneously. What is the correct
sequence when mixing insulins?
a. Inject air into the regular insulin vial and withdraw 10
units; then, using the same syringe, inject air into the NPH
vial and withdraw 40 units of NPH insulin.
b. Inject air into the NPH insulin vial, being careful not to
allow the solution to touch the needle; next, inject air into

the regular insulin vial and withdraw 10 units; then, with-
draw 40 units of NPH insulin.

c. Inject air into the regular insulin vial, being careful not to
allow the solution to touch the needle; next, inject air into

the NPH insulin vial and withdraw 40 units; then, with-
draw 10 units of regular insulin.

d. Inject air into the NPH insulin vial and withdraw 40 units;
then, using the same syringe, inject air into the regular