Which of the following needles has the widest lumen?
A . 19 gauge
B . 421 gauge
C . #22 gauge
D . #26 gauge
Answer: A
Explanation:
The gauge of a needle refers to its diameter, with a lower gauge number indicating a larger diameter. Therefore, a 19 gauge needle has the widest lumen among the options given.
It is commonly used for rapid blood transfusions or for drawing viscous fluids.
21 gauge: Smaller lumen than 19 gauge.
22 gauge: Smaller lumen than 21 gauge.
26 gauge: Smallest lumen of the options listed.
Reference: "Needle Gauge Chart." American Society for Apheresis, https://www.apheresis.org/Needle-Gauge-Chart
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