Analysis of the returned device revealed that the glass cap shows a circumferential fracture on the distal side of fiber/cap fusion zone at the bevel edge.The fiber proximal to fracture can rotate independently of outer flow tubing.The glass cap evel edge and the metal cap are not aligned, the glass cap is protruding from the metal cap.The glass cap exhibits severe devitrification at the output window.The metal cap severe charred detritus on surface.The outer flow tubing open end exhibits minor scratch marks and minor contamination most like caused by biological material.The white tubing was noted to be melted but the fiber optic is intact.Based on device analysis, the potential for forward firing may exist.The probable cause of the failure is operational context.The cause was determined based on heat accumulation.Cap wear was accelerated due to anatomical/procedural factors (tissue contact and technique) encountered during the procedure which would limit the performance of the fiber.The identified issues noted above may activate the fiberlife function which would modulate the power showing a pulsing beam or system would be placed into standby mode.
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