Nationally Registered Certified Medical Assistant (NRCMA) (NAHP) 2025 – 400 Free Practice Questions to Pass the Exam

Question: 1 / 400

Which of the following needles has the widest lumen?

#21 gauge

#23 gauge

#19 gauge

A #21 gauge needle has a smaller diameter than a #19 gauge needle, making it a not an appropriate choice for the widest lumen. A #23 gauge needle is even smaller than a #21 gauge and again, not the correct choice for the widest lumen. A #18 gauge needle is larger than a #19 gauge, but it is not the largest of the options given, making it an incorrect choice. The correct answer, #19 gauge, has the widest lumen out of the four options provided.

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#18 gauge

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