Applies to manual defibrillators, many of which have an antomated program for recognizing shockable arrhythmias and/or an external noninvasive pacemaker. See Multiparameter Physilogic Monitors Procedure 493 for inspecting units that include additional monitoring functions such as pulse oximetry, capnography, or noninvasive blood pressure. This orocedure does not apply to public defibrillators, which typically only require periodic visual checks, or to implanted, transesophageal, or transvenous pacemakers. See Procedure 418 for transvenous pacemakers.