Greg Oden underwent the same Orthokine knee procedure that Kobe Bryant had last summer, according to sources.
Oden had the non-evasive procedure done in New York two weeks ago to accelerate the healing process.
"Greg had long planned to have this procedure done,'' one of the sources said. "He thought he'd wait until his knee was completely healed, but the doctor said Greg would get the greatest benefit by doing it now because it would help his recovery.''
Gilbert Arenas and Alex Rodriguez are also known to have the procedure done.
The procedure involves doctors taking the patient's own blood, spinning it in a centrifuge, making a serum and then injecting it into the knee. Doctors claim the blood then works to stop inflammation and reduce pain and cartilage damage.
Oden is not considering retirement, but no timetable for his return has been determined.
Oden's agent is in continual contact with approximately seven NBA teams that monitor his progress.