Received 5 March 2011, Accepted 24 March 2011, Available online 23 June 2011. Spontaneous pneumomediastinum is defined as free air within the mediastinum, not associated with trauma. Causes include exercise, drugs, asthma, vomiting, difficult labour and Valsalva maneuvers. Itâs a rare, usually benign and self-limited condition, more prevalent in young males.
A youth bouncing on a trampoline. A trampoline is a device consisting of a piece of taut, strong fabric stretched over a steel frame using many coiled springs. People bounce on trampolines for recreational and competitive purposes.
This 15 ft. Trampoline and enclosure combo will keep your children both entertained and active. The trampoline and enclosure features a frame assembly that uses heavy gauged rust resistant galvanized steel using T-sockets at each trampoline and enclosure joint to create a secure and uni-bodied frame.