Final answer:
The method mentioned likely refers to how a hypodermic needle of that size would be used in medical procedures such as injections or drawing blood. Further, when calculating fluid flow through a syringe, the area of the syringe barrel and the velocity of the liquid are crucial.
Step-by-step explanation:
The question refers to a method commonly used in the medical field and pertains to the use of specific hypodermic needles for injection or aspiration purposes. The 18- to 22-gauge x 1.5-inch needle indicates the diameter and length of the needle, where a gauge size of 18 to 22 corresponds to the diameter, with lower numbers indicating thicker needles. The method itself doesn't seem to be fully detailed in the provided information, but typically, such needles would be used for administering medications, drawing blood, or other similar medical procedures. When discussing the flow of fluids through a syringe, the relevant physics concepts include calculating the area of the syringe and the velocity of the liquid emerging from the needle based on the given dimensions.