A fill spout for a drainage device is disclosed which permits the user to supply water directly to a water seal chamber of the drainage device for establishing a water seal therein. The handle, at one end, is interconnected to a tray to be deployed beneath the animal in advance of urination. On the other hand, a P-channel type third MOS transistor and a P-channel type fourth MOS transistor serving as protection transistors are connected in series between a high power supply potential and the output terminal. A subset of current user terminals with representative user terminal environments may be identified. The multiplexer is coupled to selectively communicate the quotient signal from one of the at least two paths to a stage output to select one of the stage delays. The surgical tools are designed to be customizable or highly selectable by patient to increase the speed, accuracy and simplicity of performing total or partial arthroplasty.