Post surgery psa, follow-up to Maldugs thread

I didn't want my question to get lost so I'm creating a new thread.  I was just reading maldugs post re first post-op PSA and I have a question.  He mentions that his post surgery PSA came in at 0.05 and his Urologist said that he may need to have follow-up radiation.  I thought the post surgery psa should be <.1 to be considered normal.  What are the factors that determine if radition is required as a follow-up protocol?  Is it the psa and margins?  What psa levels post surgery require follow-up treatment?

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"Idaho" ~ Barry

 

Da Vinci Surgery July 31, 2007… 54 on surgery day
PSA 4.3  Gleason 3+3=6  T2a  Confined to Prostate

1st PSA 0.04 (undetectable) 9/11/2007