Final answer:
Smaller gauge needles can cause complications when drawing blood due to increased blood cell destruction, hemolysis, or clotting. Using larger gauge needles is recommended for better blood flow and accuracy of blood tests.
Step-by-step explanation:
Smaller gauge needles, such as those that are smaller than 23 gauge, are not recommended for drawing blood because they can cause complications. When needles with smaller gauges are used, it can result in increased blood cell destruction, hemolysis, or clotting.
For example, if a needle with a gauge smaller than 23 is used to draw blood, the smaller size can potentially damage the red blood cells, leading to hemolysis. This can affect the accuracy of the blood tests being performed.
Using larger gauge needles, such as 21 or 22 gauge, is recommended since they provide better blood flow and are less likely to cause complications.