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.
Trampoline Tie Down Kits to Improve the Safety of Playtime. Trampoline anchor kits are highly recommended if you plan to place your trampoline in an open area that is exposed to the wind. Trampoline anchors are also recommended for if you plan to put your trampoline near to a property.