(b)(4).Section b5 was corrected from initial report from "there was no reported patient involvement" to there were no patient consequences.The opt980 optiflow + mask interface adapter is a patient interface used for delivery of humidified respiratory gases and allows for the connection of a heated breathing tube to a standard vented face mask or to a patient's tracheostomy.The interface is held in place by a head strap and features a head strap clip which works in tandem with the tubing clip (attaches to the patient's clothing/bedding) to support the weight of the circuit and prevent the cannula being dislodged.Method: the complaint opt980 optiflow + mask interface adapter was not returned to fisher & paykel healthcare (f&p) for evaluation.Our investigation is thus based on the information and photograph provided by the customer, and our knowledge of the product.Results: visual inspection of the provided photograph revealed the tubing of the opt980 optiflow + mask interface adapter was torn in two locations, near the mask mode adapter and the middle of the tube.Conclusion: we are unable to determine the cause of the reported event.However, based on previous investigations, the reported event was likely caused by the cannula being subjected to excessive force during use.All optiflow interfaces are inspected during production for visual defects including cracks, tears, inclusions, discoloration and stretching or deformation.Any product that fails the visual inspection is rejected.The subject opt980 optiflow + mask interface adapter would have met the required specifications at the time of production.The user instructions which accompany the opt980 optiflow + mask interface adapter show in pictorial format the correct placement and fitting of the cannula and also warn: "appropriate patient monitoring must be used at all times.Failure to monitor the patient may result in loss of therapy, serious injury or death." "do not crush or stretch tube." "failure to use the set-up described above can compromise performance and affect patient safety.".
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