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The product was not returned for evaluation and had been used for treatment.A relationship, if any, between the product and the reported event could not be determined since the product was not returned for evaluation.Visual inspection and functional testing could not be performed because the product in question was not returned for evaluation.Thus, the customer¿s complaint could not be verified, nor could a root cause be determined with confidence.The instructions for use (ifu) provided with the device contains warnings and precautionary measures related to proper use of the device including but not limited to: - breathing distress is a possibility in physically small patients or patients with a shallow nasopharynx due to improper positioning of the device.- respiratory distress or decreased oxygenation can occur in patients at risk for impaired respiratory condition.- monitor the device for any sign of deflation, which can cause dislodgement of the nasal catheter.- over inflating the pvc balloon may result in: a) balloon rupture with possible trauma to nasal tissue, b) tissue necrosis due to excessive pressure.- do not exceed stated maximum volumes.Exceeding these volumes may cause the balloon to rupture.
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