collar
[kol´er] a type of orthosis worn around the neck for support and stabilization. See also
cervical orthosis.
four poster collar a rigid brace with four upright rods to support the neck and reduce motion; it has chin and occipital supports.
Philadelphia collar a rigid, adjustable
neck brace.

Philadelphia collar. From Dorland's, 2000.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
A rigid collar comprising a firm plastic bi-valved shell secured with Velcro straps and removable padded liner which is used to immobilise the head and neck after a cervical fracture, which can be used with chest and head extensions to increase stabilitySegen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
Phi·la·del·phi·a col·lar
(fil'ă-del'fē-ă kol'ăr) Commonly used collar for immobilization of the cervical spine or neck; stabilizes patients in the field for transport to a medical facility.
Medical Dictionary for the Health Professions and Nursing © Farlex 2012
Philadelphia,
city in Pennsylvania. Philadelphia chromosome - an abnormal minute chromosome formed by a rearrangement of chromosomes 9 and 22.
Philadelphia collar - head and neck orthosis.
Medical Eponyms © Farlex 2012