Engines that do not have a water cooling system can not use a heater core; one alternative is to guide air around the (very hot) engine exhaust manifold and then into the vehicle's interior. Temperature control is achieved by mixing with unheated outside air.
OBJECTIVE: The thickness of the prevertebral soft tissue (PVST) is instrumental in helping detect cervical spine injuries in the pediatric population.ormal pediatric prevertebral soft-tissue thickness on MDCT. Vermess D(1), Rojas CA, Shaheen F, Roy P, Martinez CR. Author information: (1)Department of Radiology, University of South Florida College of Medicine, 12901 Bruce B. Downs Blvd, Box 17, Tampa, FL 33612, USA.
Widening of the prevertebral soft tissue space is thus described as one of diagnostic signs of cervical spine injuries [4] . Routine measurement of the prevertebral soft tissues has been used as a simple procedure that may provide an important clue to subtle cervical spine injury [5] .