The following were reviewed as part of this investigation: sample evaluation, patient severity, complaint and lot history, applicable previous investigation(s), labeling, and applicable fmea documents.Based on a review of this information, the following was concluded: the complaint of a stuck safety mechanism was confirmed and the cause was determined to be use related.The product returned for evaluation was a 22ga x ¾¿ safestep infusion set.The safety mechanism of the device was pulled away from the needle base by 3-4mm.The safety mechanism was confirmed to be stuck in position, being slightly pulled away from the needle base.Gross visual evaluation of the device, with a specific focus on the safety mechanism, found that the needle shaft was slightly bent at the location of the stuck mechanism.Microscopic examination of the region found that the metal collar of the safety mechanism was in direct contact of the bend joint.Further microscopic examination found no evidence of other potential contributing factors.The safety mechanism was then forced open and inspected additionally for potential causes of the bent shaft.It was seen that the bend would have occurred at the distal edge of the safety mechanism plate.This type of event can occur if the patient is not accessed by pushing directly downwards with the infusion set.No potential manufacture contributing factor was observed.A lot history review (lhr) of asbxs0227 showed six other similar product complaint(s) from this lot number.
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