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.
12x12 piece of NEW mat material, PLENTY of heavy duty trampoline sewing thread (black), and a sewing information sheet. A trampoline patch kit is designed to allow the trampoline owner to supply a local tarp or canvas re-sew or upholstery shop with the material needed to properly patch a trampoline jumping mat.2x12 piece of NEW mat material, PLENTY of heavy duty trampoline sewing thread (black), and a sewing information sheet. A trampoline patch kit is designed to allow the trampoline owner to supply a local tarp or canvas re-sew or upholstery shop with the material needed to properly patch a trampoline jumping mat.