Section 884.4260 - Hygroscopic Laminaria cervical dilator(a)Identification. A hygroscopic Laminaria cervical dilator is a device designed to dilate (stretch open) the cervical os by cervical insertion of a conical and expansible material made from the root of a seaweed ( Laminaria digitata or Laminaria japonica). The device is used to induce abortion.(b)Classification. Class II (performance standards).