Inclusion Criteria:  ASA I, II, III Laparoscopic colectomy Elective surgery  Exclusion Criteria:  Patient refusal Known allergies to local anesthetics Other contraindications to regional anesthesia Infection or anatomic anomalies on injection site Uncontrolled hypertension Severe liver or kidney disease Pregnancy Known depression or psychiatric disorders, dementia Drug or alcohol abuse Inadequate command of Greek language