FRCP
Prior settlement agreement is not a basis for issue preclusion of subsequent claim.
Prior broad release of claim did not indemnify physicians against delay in in treatment for subsequent recurrence of chronic condition.
Where a physician is both the decisionmaker and the author of guidelines for treatment of prisoner medical conditions, an allegation against him in the former capacity states a claim.
http://media.ca7.uscourts.gov/cgi-bin/rssExec.pl?Submit=Display&Path=Y2016/D01-11/C:15-1732:J:PerCuriam:aut:T:fnOp:N:1685055:S:0
Since 2011. An occasional commonplacing of the U.S. Circuit Courts of Appeal.
Neither an authoritative statement of the law nor legal advice. Quick work.