Assessment parameters included hemodynamics , pain severity , total analgesic consumption , and measurement of interleukins ( IL ) ( IL-6 and IL-8 ) at baseline time after anesthetic induction ( TBaseline , ) ; at the end of the abdominal stage of the operation ( TAbdo , ) ; 15 minutes after initiation and at the end of OLV ( TOLV 15 ) and ( TOLV End ) respectively ; one and 20 hours after the end of the surgical procedure ( TPostop1 and TPostop20 ) , respectively , and patient 's outcome also recorded .