The product was returned and the failure mode was not confirmed.Visual inspection: no physical damage was seen on the sheath.In addition, no protrusions or sharp edges were seen on the distal tip.However, rust was seen on the stop cock.The probable root cause for the device catching on tissue is likely due to use error.The probable root causes for the rust on the stop cock could be due to 1) improper sterilization methods, 2) insufficient drying, or 3) improper storage conditions.In sum, the product was returned and the failure mode was not confirmed.
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