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.
Brand: Skywalker Trampoline. Give your kids a place to burn off extra energy! This Skywalker Trampoline features a full enclosure system with foam padded poles and the patented no-gap enclosure system that attaches to the jumping surface at every spring to eliminate dangerous gaps (Patent #RE45,182).