Engineering analysis: no lot numbers were provided so a review of manufacturing and qc records could not be performed.The territory sales manager performed a visual inspection of the tunneler kit; during this inspection he found no defects with the tunneler kit in question.The tips screwed on and off easily and had a smooth transition, no sharp edges or burrs were found.Photographs taken during this inspection have been reviewed and confirmed that there are no defects with the tunneler kit in question.Engineering summary: the engineering analysis could not determine the root cause of the incident.No defects were found during the inspection of the tunneler kit.All tunneler components are received with a certificate of compliance from the supplier.The tunneler kit instructions for use contain the following precautions: avoid damaging the threaded portions of the rods and tips through improper handling.The maquet tunneler requires disassembly, thorough cleaning, inspection and sterilization prior to each use.Do not soak the instruments in saline or bleach solutions, which may cause damage to the surfaces of the instruments.Do not use tunneler rod without compatible tip.Prior to use inspect instruments for the presence of foreign material including any residual tissue or debris, or any burrs or other surface anomalies that might injure the patient.Conclusion: based on the details of the event and the successful lot qualification test data, atrium can find no fault with the lot of tunneler kits in question.Clinical evaluation: the patient that requires a vascular graft has vascular tissue that may be hardened and calcified or very friable.Grafts are implanted surgically via an open incision and/or sub-cutaneous tunneling in certain applications.Surgeons undertaking such procedures are specialists in vascular disease and surgery and they have the skills necessary to be working in an operative suite and are supported by trained staff.In the event that an adverse situation occurs that is unexpected, an additional intervention may need to be performed.Any implantable device should be examined by the physician immediately prior to implant to confirm that the product is intact, that the threads of the component are undamaged and that the appropriate size is available.It is advised in the ifu of the product to contact atrium if these issues are noted.The ifu also advises that "avoid damaging the threaded portions of the rods and tips through improper handling.Tunneling can be one of the most traumatic parts of performing vascular surgery.Atrium designed its vascular tunneler system to minimize the trauma associated with tunneling.The atrium tunneler makes a tunnel that is the same size as graft being placed.
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