Mintek LV, LV-T 9. Elective Replacement Indication (ERI), Cycle, Service, Definition, Abbreviation, Table 29: Service Cycle Definitions

Stratos LV/LV-T Technical Manual 145

9. Elective Replacement Indication (ERI)

Service times for the Stratos CRT-Ps vary based on several factors, including battery properties, storage time, lead system impedance, programmed parameters, amount of pacing and sensing required, and circuit operating characteristics. Service time is the time from beginning of service (BOS) to the end of service (EOS). To assist the physician in determining the optimum time for pulse generator replacement, an elective replacement indicator is provided that is activated when the battery cell capacity drops to a predetermined level. The following table defines the different service cycles (at standard settings, 37°C, and with a lead impedance of 500 ohms). The beginning of the replacement cycle is displayed on the programmer after pulse generator interrogation and appears on the printout.

Table 29: Service Cycle Definitions

Abbreviation	Service	Definition
	Cycle
BOS	Beginning of	Normal service cycle;
	Service	battery in good condition
ERI	Elective	Identifies the time of
	Replacement	elective replacement
	Indication	indication. The rate
		occurring at ERI depends
		upon the programmed
		mode and magnet
		application.
EOS	End of	Identifies the end of the
	Service	elective replacement
		indication period.

The Stratos CRT-Ps indicate the need for replacement by a defined decrease in the programmed pacing rate without a magnet applied. The rate change is dependent on the programmed pacing mode.