Multiple sizes of Neptune Medical LLC’s overtube for gastrointestinal (GI) procedures that allows thin-walled tubes to toggle between flexible and rigid states received FDA clearance. With the clearance, the Burlingame, Calif.-based company now has nine sizes of cleared single-use overtubes with more in the wings. The Pathfinder endoscope overtube device uses Neptune’s Dynamic Rigidization technology to keep tubes from looping during procedures, a problem that leads to procedure failure, patient pain and complications in colonoscopy and other GI procedures.