Qn#(b)(4).The device lot number was not provided; therefore , a dhr review could not be conducted.One actual sample was returned for investigation.Based on the complaint statement, it was reported that the user wanted to remove the device , but the balloon could not be deflated.To verify the accessibility to the balloon deflation, the actual sample was inflated with l.5ml of water using normal syringe and showed no issue to stay inflated.The sample was then subjected to deflation testing using the same method.Once again, the sample is able to deflate completely without having any difficulty and no significant lump that cause a resistance during removal.Non-deflation could be due to several reasons such as improper fixation of syringe to the valve, faulty valve and blockage of inflation lumen.In a standard practice, an empty syringe without plunger is also recommended to be used to drain off the fluid by gravity and avoid creation of vacuum effect and ease deflation process.Besides that , based on the ifu, it was advice to cut the shaft near the entry site as to allow the liquid to flow out of the balloon if the valve fails to deflate the balloon.In our current standard operating procedure, the products are subjected to 100% visual inspection and any defective raw balloon will be discarded before sent to the next process.Upon completion of assembly process, the finished catheter will be again subjected to 100% balloon inspection, 20 minutes leak test and 100% deflation process.Catheter with defective balloon will be culled out during this process.Non-deflation balloon may due to several reasons.However, after investigation there was no deflation issue encountered during testing.Therefore, this complaint could not be confirmed.
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