Inclusion Criteria:  patients scheduled for elective laparoscopic cholecystectomy were enrolled in this study  Exclusion Criteria:  patient refusal to participate, Sever renal or cardiac illness, Pulmonary diseases as emphysema or chronic obstructive pulmonary disease Neuromuscular diseases (as myopathies and myasthenia gravies), -Hematological diseases, bleeding or coagulation abnormality, Psychiatric diseases, Local skin infection and sepsis at site of the block, Known hypersensitivity to the study drugs, and Severe chest wall deformity, e.g. scoliosis.