The US FDA recently published four guidance documents, two final — one concerning antimicrobial susceptibility test system devices and another related to devices with physiologic closed-loop control technology. The agency’s two draft documents pertain to electronic submissions for de novo requests and graft-versus-host diseases.

Researchers from the Brigham and Women’s Hospital and Harvard Medical School argue that the Ensuring Patient Access to Critical Breakthrough Products Act is “a step in the wrong direction.”

This week, studies supported Nevro’s spinal cord stimulation therapy and a VRx system that helps reduce pain; the American Medical Association found inconsistent insurance coverage of digital therapeutics; and Geneticure announced a cheek-swab test to identify which patients are most likely to benefit from renal denervation.