Evaluation found no leakage on the returned catheter.The catheter had undergone 7 days leak test and no leakage was observed on the catheter.The catheter was dissected and found no conditions that could have contributed to the reported event.The device history record was reviewed and found nothing that could have caused or contributed to the reported event.The instructions for use were found adequate and state the following: "[contraindications/prohibitions] -concerning use 1) do not reuse.2) the balloon and shaft of catheter should not be pinched with forceps, etc.Damage to the catheter with a blade or sharp-edged devices must be avoided.[there is a strong likelihood that breakage or spontaneous removal of catheter, or rupture balloon will occur, and that inability of balloon to deflate may make removal of the catheter difficult.] [prohibited concomitant use] 1) do not use ointments, contrast medium or lubricants having a petrolatum base on catheter (including oil of animal or plant origin, such as olive oil and petrolatum jelly and mineral oil).[they will damage latex and may cause balloon to burst.Do not wipe catheter surface with organic solvents (such as alcohol).] 2) no substance except sterile water should be used to inflate the balloon.[the contrast medium may cause balloon to burst.If normal saline is used, crystallized salt may occlude the inflation lumen to prevent deflation of the balloon.When air is used, air may escape to cause spontaneous deflation of the balloon so that the catheter may come out prematurely.]".
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