I very well may have overlooked it. Did anyone mention a couple of 10ga needles with catheters including one way valves from a pet store aquarium section? These work great for a tension pneumo. 14 ga will work in a pinch. Also, you can always resort to a latex glove finger tip as well on the end of the catheter, after the needle has been punched through and withdrawn, to prevent air from rushing back into the pleural space. Remember, 2nd or 3rd intercostal space, mid-clavicular, top of the rib, bevel down.

http://www.drsfostersmith.com/images...ish-supply.jpg

These are sort of similar to the ones we carry on our medic units.

http://www.petworldshop.com/pictures...heck-valve.jpg

OF COURSE BE CERTIFIED, TRAINED AND NEVER TRY THIS AT HOME.