Qn#(b)(4).In the absence of product catalogue and lot number, document review could not be performed to observe any abnormalities in the manufacturing process.One actual sample was returned for investigation.Returned sample was removed carefully from polybag.Visual examination on the catheter did not show any obvious defect, material degradation or damage.Attempt to inflate the balloon with 1.Sml air was successful.The balloon was able to be inflated to its required size and shape without any failure.No leakage or balloon rupture observed.In our current standard operating procedure, the products are subjected to 100% visual inspection and any defective raw balloon will be culled out before sent to the next process.Upon completion of assembly process, the finished catheter will be again subjected to 100% balloon inspection and 20 minutes leak test.Catheter with defective balloon will be culled out during this process.Based on the investigation conducted on the returned sample, the balloon was able to be inflated without any failure.Therefore this complaint could not be confirmed.
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