Electrode performance beyond the manufacturer's recommended lifespan using the Dornier MFL 5000 lithotripter.

ABSTRACT

BACKGROUND AND PURPOSE: Electrodes used by the Dornier MFL 500 lithotripter have a specified lifespan, after which, the manufacturer recommends replacing the electrode before continuing the treatment. The aim of this study was to investigate whether electrodes continue to function effectively beyond 100% consumption by measuring the pressure output of electrodes up to 300% consumption or until electrode failure. MATERIALS AND METHODS: We assessed new, refurbished, and twice-refurbished electrodes to compare their respective performances. RESULTS: Rather than a decrease, there was a trend toward increased pressure output beyond 100% electrode consumption, with no drop in pressure prior to 300% consumption or electrode failure. All three types of electrodes functioned adequately above 100% consumption. CONCLUSION: These observations suggest that discarding the electrode before the completion of the treatment or electrode failure is not warranted. Using a single electrode rather than multiple electrodes to complete a treatment has the potential to save both time and cost.