One bivona® 3.5mm aire-cuf® neonatal and pediatric tracheostomy tube was returned for investigation.During functional testing, a syringe was used to inflate the device cuff and inflation balloon with 5cc's of air and the device was submerged under water; the device was manipulated while under the water.No bubbles (indicating a leak) were found escaping from the device.The cuff was removed from the water and the device cuff was inflated with 5cc's of air and allowed to sit for 4 hours.A loss of volume of the cuff was observed; however, a leak could not be detected.Investigation was unable to determine the root cause of the reported issue; however, no evidence was found to suggest a manufacturing defect.
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