NecLoc® Extrication is designed for restriction of movement of the cervical spine. NecLoc® Extrication is designed for restriction of movement of the cervical spine. The trachea opening allows healthcare professionals to quickly perform carotid pulse monitoring and emergency tracheotomies while providing cervical immobilization. The Collar is non-invasive, single patient, reusable device, used as a weight bearing mechanism. Ergonomic, 2-piece, clamshell design is available in 5 unique, phenotype-driven sizes.