FDA classified Boston Scientific's removal of Imager II angiographic catheters as Class I on September 25. Two serious injuries had been reported as of July 16. There were no deaths.
The cause is a manufacturing defect that left less stabilizing agent in the catheter tips. Tips can degrade and detach. FDA says a fragment can block blood flow and cause a life-threatening embolism, though complaints never increased.
Boston Scientific told customers to stop use, segregate inventory, check UPN numbers on inner and outer packaging, and return product with a verification form. Patients already treated stay under monitoring. The company said in early September that it was ending the line rather than correcting it.
Two injuries and a flat complaint trend still produced the agency's most serious recall class. The argument FDA is making is deviation from the cleared specification, which is a reminder that your own conformance data can set the class before any signal shows up in the field.