Product evaluation: failure analysis for fiber 0010-2400-731a-(b)(4): 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 exhibits severe devitrification at output window; the metal cap exhibits mild detritus adhesion on surface; the outer flow tubing open end exhibits minor scratch marks; the proximal end of fiber shows evidence of some type of contamination on the optical surface of connector; the segments of connector appear in good condition.Based on device analysis, the potential for forward firing may exist.Probable root cause: based on the device analysis, the probable root cause of the failure is: operational context.The probable root 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.The probable root cause of 'connector contamination' is: handling damage.Over temperature, moisture can be the result of a contaminated connector; introduction of the contaminant is unknown.
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