Hi Kevin,
I too have this problem. For me its the feeling of being trapped 30,000 up I suppose. Long Haul I fly business class, because the WC situation is quieter and more relaxed, plus the other 100 reasons! But its eye wateringly expensive. Andrew speaks good sense, a catheter is unlikely to be needed but the fact its there helps with a feeling of an exit route if all else fails. Practice at home first though, its an acquired skill. I think the USA site has more info on Caths. Good luck!
3 years 4 months ago