He Regulated Medical Devices. His Wife Represented Their Makers.

Ethics rules barred Dr. Jeffrey E. Shuren from working on matters involving clients of his wife’s law firm. But he did not always step aside.

For 15 years, Dr. Jeffrey E. Shuren was the federal official charged with ensuring the safety of a vast array of medical devices including artificial knees, breast implants and Covid tests.

When he announced in July that he would be retiring from the Food and Drug Administration later this year, Dr. Robert Califf, the agency’s commissioner, praised him for overseeing the approval of more novel devices last year than ever before in the nearly half-century history of the device division.

But the admiration for Dr. Shuren is far from universal. Consumer advocates see his tenure as marred by the approval of too many devices that harmed patients and by his own close ties to the $500 billion global device industry.

One connection stood out: While Dr. Shuren regulated the booming medical device industry, his wife, Allison W. Shuren, represented the interests of device makers as the co-leader of a team of lawyers at Arnold & Porter, one of Washington’s most powerful law firms.

Dr. Shuren signed ethics agreements obtained by The Times that were meant to wall him off from matters involving Arnold & Porter’s business. But it's not clear how rigorously the ethics agreements were actually enforced. His wife’s law firm refused to provide a list of clients — and the agency had no legal authority to require it, said Michael Felberbaum, a spokesman for the F.D.A.

In a review of thousands of pages of court documents and F.D.A. records and dozens of interviews with current and former agency staff members and advocates, The Times identified some clients and several instances in which the Shurens’ roles intersected.