An insulin syringe has four parts: a cap, a needle, a barrel, and a
Insulin syringes are made in several sizes.
1/4 mL or 0.25 mL
1/3 mL or 0.33 mL
1/2 mL or 0.50 mL
Use the smallest syringe size you can for the dose of insulin you
need. The measuring lines on the barrel of small syringes are farther apart and
easier to see. When you choose the size of syringe, consider the number of
units you need to give and how well you can read the numbers on the barrel. A
0.25 mL or 0.33 mL syringe often is best for people who have poor eyesight,
because the numbers on the barrel are larger and easier to see.
November 3, 2011
Sarah Marshall, MD - Family Medicine & Rhonda O'Brien, MS, RD, CDE - Certified Diabetes Educator
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