Figtree - I don't know why I put 8 gauge. Anyway, I ran downstairs and double checked - they're 14 gauge, 3.25" catheters. They are sold by North American Rescue as a decompression "kit", which is really just the catheter in a nifty plastic storage tube.

John E. - I appreciate your concerns, and I'd never attempt a decompression on a random individual within range of definitive care (i.e. at the scene of a car accident). However, in the woods, it might be a different story. If were my wife or I, I'd do it in a heartbeat (without waiting for late signs like JVD or tracheal shift). If I ran across someone I didn't know in the backcountry who began to exhibit late signs, it would be a judgement call - I'm not trying to get sued. I definitely respect your decision not to attempt this, though, as it would adversely affect your livelihood. If you like I'd be more than happy to explain more about my choice in this matter via PM.

The Stiff Kiss...I purchased it at a military PX about 8 or 9 years ago. It's the half-serrated tanto, and I wish I had a couple more of them. They're great, sturdy little knives. Check ebay - there are a few on there right now.