There is disclosed an ink jet printhead which has a plurality of nozzles 3 and one or more heater elements 10 corresponding to each nozzle 3. More particularly, the present invention is directed at a system and related methods for performing surgical procedures and assessments involving the use of neurophysiology. A triggering key is used to activate the interface module in the case of an emergency, thereby causing the communication device to transmit a signal to the recipient. This increases the amount of stress from the stress layer that the gate retainsmemorizes thereby increasing device performance. The console also removes air from a channel disposed about an inner rim of the cooling device, using a negative gage pressure. The pinch clip nests in an adapter placed on an enteral feeding pump such that when the pinch clip occluder is properly position, flow is allowed through the infusion set, but when the pinch clip occluder is not properly positioned in the adapter, flow through the infusion set is prevented.