Pendelton

 was a Brotherhood of Steel soldier in the Citadel.  had a surgery performed by Sawbones. It is unknown whether or not  survived, but based on reports it is most likely that he did.

Background
He had an appendectomy (performed by Sawbones) where a rotary saw was tested out to see how well it would work, suturing was ineffective in closing his abdomen so they used high-intensity heat to cauterize the cut. The outcome of the operation was successful.

Appearances
is only mentioned in Fallout 3.