This article is from the the official alt.spleen FAQ, by Andrew Stellman with numerous contributions by others.
Andrew says: NOTE: PLEASE DO NOT SEND ANY MAIL TO ME REQUESTING MEDICAL ADVICE! I AM NOT A DOCTOR, AND WILL NOT GIVE YOU ANY USEFUL INFORMATION.
This is, perhaps, the most-asked question on alt.spleen. Tom Mary Dobrowolsky (firstname.lastname@example.org) has an answer:
"Well you can certainly talk about it here on this here NEWSGROUP. However, proper spleen venting, unless you are absolutely certain you know what you are doing, should be done by a duly certified spleen mechanic.
"I shouldn't have to tell you the humorous but really dangerous stories of 'armchair mechanic' spleen owners venting their spleens and ending up with leftover parts afterwards.
"Whatever you do, please make sure to have a pressure gauge handy. There's nothing worse than a over/under-inflated spleen."