More Rigorous Studies Needed for Devices: Researchers
FDA should require more rigorous clinical studies for high-risk medical devices used in obstetrics and gynecology than currently required, according to researchers from Northwestern University. Their study, published in the journal Obstetrics and Gynecology, found that some high-risk devices were approved based on flawed data. “We found that there’s an opportunity to increase the burden of proof required for a device to be approved for public use,” said researcher Jessica Walter. The researchers identified 18 high-risk devices approved by the agency from 2000 to 2015, most of them for endometrial ablation (reducing menstrual flow), contraception and fetal monitoring. “Four of the devices – 22% – were approved even though they failed to demonstrate efficacy in clinical trials,” they say. “Six of the devices – 33% – were not required to undergo post-market studies to survey ongoing safety. Three devices were eventually withdrawn from the market after approval. Of those three, two were not reviewed by physician experts on the FDA’s obstetrics and gynecology advisory committee. The other was reviewed but not recommended for approval by the committee.” The researchers criticized Bayer’s controversial Essure permanent contraceptive device approved by the agency in 2002. “The device, meant to last a lifetime, was approved based on short-term evidence and insufficient post-market follow-up,” they say.“There are much higher standards for the approval of new drugs, whether oral, injectable or even topical. The important question to ask is: should we really be holding high-risk medical devices to a lower standard of evidence than drugs?” Additionally, the researchers note that the House’s 21st Century Cures Act and a companion bill in the Senate contain provisions that would broaden the definition of “valid scientific evidence” manufacturers need in order to prove medical benefit. “Our concern is that this would lead to more devices getting approved with even less clinical evidence that they are both safe and effective,” they caution.