(b)(4).One vps g4 g1+ legacy stylet assembly was returned.A visual examination revealed the sample was returned in two (2) pieces.Piece 1 is the basic stylet, including a complete ecg wire.Piece 2 is a partial section of the coaxial cable and the outer polyimide/ptfe tubing.It was reported "protective coating on the biosensor came off during insertion.Arrow vps stylet graphic specifies the stylet length is 35.000 +/- 0.250 inches from the end of the santoprene jacket.The ecg wire in returned sample piece 1 measured approximately 35 1/16 inches from the end of the santoprene jacket, indicating the ecg wire was complete and not separated.The polyimide/ptfe tubing and coaxial cable remaining on returned sample piece 1 measured approximately 18 12/16 inches from the end of the santoprene jacket.The coaxial cable in returned sample piece 2 measured approximately 16 4/16 inches.The two lengths combined (18 12/16 + 16 4/16) equals 35 inches meets the specification, which means the complete coaxial cable was recovered and returned.The encapsulated transducer was intact on the end of the coaxial cable.The separated polyimide/ptfe tubing in returned sample piece 2 measured approximately 18 12/16 inches with approximately 2 6/16 inches stretched and empty.The lengths of the returned polyimide/ptfe tubing indicate the complete length of tubing was recovered and returned.A microscopic examination of the separated areas did not reveal any specific causes for the separation of the stylet.A device history record review performed on the stylet did not reveal any manufacturing related issues.The reported issue "protective coating on the biosensor came off during insertion" was confirmed by evaluation of the returned vps g4 g1+ legacy stylet assembly.A visual examination revealed the sample was returned in two (2) pieces.Piece 1 is the basic stylet, including a complete ecg wire.Piece 2 is a partial section of the coaxial cable and the outer polyimide/ptfe tubing.The results of dimensional inspection concluded a complete stylet was returned and no pieces were left in the patient.The dimensional inspection revealed evidence of "stretching" of the tubing before separation.A microscopic examination of the separated areas did not reveal any specific causes for the separation of the stylet.A device history record review performed on the stylet did not reveal any manufacturing related issues.A probable cause of this issue could not be determined.No further action will be taken.Teleflex will continue to monitor and trend reports of this nature.
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