Changes in Thyroid function

we had been studied the changes in thyroid hormones underdifferent anaesthetic techniques in fifty male, ASA 1, patientsundergoing minor elective surgical procedures (oblique inguinalherniorrhaphy or haemorrhoidectomy). Their ages vary from 19 to 42years and their weights vary from 65 to 91 kg. The range of operativetime varies from 20 to 55 min. These patients who participated in thisstudy were allocated to five equal groups each (n = 10).roup I : Patients received halothane as the main anaesthetic agent”halothane group”.roup 11 : Patients received enflurane as the main anaesthetic agent”enflurane group”.roup III : patients received isoflurane as the main anaesthetic agent”isoflurane group”.roup IV : Patients received propofol as the main anaesthetic agent astotal intravenous anaesthesia (TIV A) ”propofol group”.roup V : Patients received spinal anaesthesia ”spinal group”.