Cervical Orthosis (Philadelphia)Cervical Orthosis (Philadelphia) Helps reduce neck pain and improve posture The Cervical Orthosis (Philadelphia) is a cervical collar that provides excellent immobilization and comfort. Offers a large trachea opening for easy monitoring and emergency tracheotomies and is reasonably well tolerated. Scientifically designed to ensure complete immobilization and perfect fit, it is easy to apply with a two piece design and offers options to vary rigidity.