Final answer:
The correct order of butterfly needles by decreasing bore dimension is 19 gauge, 21 gauge, 23 gauge, corresponding to option A. Lower gauge numbers represent larger bores.
Step-by-step explanation:
In the context of butterfly needles, the term gauge refers to the size of the needle's bore, or the opening through which fluids pass. The correct order for placing butterfly needles from largest to smallest bore dimension is: 19 gauge, 21 gauge, 23 gauge. Thus, option A (19 gauge, 21 gauge, 23 gauge) is the correct sequence. This is because in the gauge system, commonly used for needles and wires, a lower gauge number indicates a thicker needle with a larger bore, and vice versa. A higher gauge number means a thinner needle with a smaller bore, as indicated by Figure 9.11 where higher gauge numbers mean thinner electrical wires. Remember, in medical settings, the gauge of a needle impacts both the flow rate of fluids and the level of discomfort experienced by a patient during procedures like blood draws or medication administration.