00732467 Rev. D Page 27 of 110
Yellow PSS Indicator Light
A YELLOW PSS indicator light is displayed when a Non-Sensing/Non-Split dispersive
electrode is connected to the gi4000 ESU. When the PSS light is YELLOW, the operator is
prompted to proceed with additional caution as all safety features of the PSS are not active
with Non-Sensing/Non-Split dispersive electrodes.
Green PSS Indicator Light
A GREEN PSS indicator light is displayed when a Sensing/Split dispersive electrode is both
connected to the gi4000 ESU and to the patient properly. Impedance parameters indicate that
RF electrical energy may be delivered.
CAUTION: Non-Sensing Pad Hazard. The gi4000 ESU Pad Safe System (PSS)
will function with contact quality monitoring (CQM) Sensing/Split dispersive
electrodes or Non-Sensing/Non-Split dispersive electrodes. Other dispersive
electrode products may result in patient or user injury and/or product damage.
→ In order for all safety aspects of the gi4000 Pad Safe System (PSS) to
operate, Sensing/Split dispersive electrodes must be used. Non-
Sensing/Non-Split dispersive electrodes are acceptable if used with
proper user care.
→ The PSS will not identify loss of safe contact between the Non-
Sensing/Non-Split dispersive electrode and the patient, thereby failing to
provide an audible alarm which may result in patient or user injury or
product damage.
→ Disposable dispersive electrodes with a Sensing/Split contact surface
allow the gi4000 ESU to monitor the skin contact quality of the electrode
connection. The dual pad design has a small monitoring current that
flows from one side of the electrode over the patient to the other side of
the pad. STERIS Endoscopy recommends the use of Sensing/Split
dispersive electrodes for use with the gi4000 ESU.
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