A video output signal analyzes that analyzes a video output signal to determine game play information. The compound can be used as a reference standard for monitoring the presence thereof in a paliperidone sample, including monitoring the completion of a paliperidone reaction. The catheter hub has an interior having a raised annular rib disposed thereon. A retainer provided with an insulative member through which the pipe is coaxially held within an associated one of the holes while forming a gap between an outer periphery of the pipe and an interior wall of the associated one of the holes. The needles are also imbedded in, or juxtapose to a ring of compressible dye-containing material that serves to conceal the needles and provide demarcation of the area injected.