Final answer:
The width of a puncture plays a significant role in establishing blood flow in a dermal stick as it affects the resistance to flow. Increasing the diameter of a blood vessel decreases resistance and increases blood flow, while decreasing the diameter increases resistance and decreases flow.
Step-by-step explanation:
The width of a puncture plays a more important role in establishing blood flow in a dermal stick because it affects the resistance to flow. When the diameter of a blood vessel is increased, there is less blood contacting the vessel wall, resulting in lower friction and lower resistance. This decrease in resistance leads to increased blood flow. Conversely, when the diameter is decreased, more of the blood contacts the vessel wall, increasing resistance and decreasing flow.