Comment on

• Effects of perioperative analgesic technique on the surgical outcome and duration of rehabilitation after major knee surgery.

  Capdevila X, Barthelet Y, Biboulet P, Ryckwaert Y, Rubenovitch J, d'Athis F. Capdevila X, et al. Anesthesiology. 1999 Jul;91(1):8-15. doi: 10.1097/00000542-199907000-00006. Anesthesiology. 1999. PMID: 10422923 Clinical Trial.
• Subarachnoid sufentanil for early postoperative pain management in orthopedic patients: a placebo-controlled, double-blind study using spinal microcatheters.

  Standl TG, Horn E, Luckmann M, Burmeister M, Wilhelm S, Schulte am Esch J. Standl TG, et al. Anesthesiology. 2001 Feb;94(2):230-8. doi: 10.1097/00000542-200102000-00011. Anesthesiology. 2001. PMID: 11176086 Clinical Trial.