A Comparison of Extrusion Time of Ventilating Tube (pariz) with mported v.t (Shepard) in Patients Affected with Chronic Serous Otitis

ABSTRACT Otitis serous is a common disease in pediatrics and ENT which can be treated by various medical and surgical techniques. The traditional surgery treatment of this disease has been done by realation of middle ear cavity with myringotomy and insertion of ventilation tube in tympanic membrane. Since remaining time of ventilation tube in tympanic membrane has a direct effect on the tratment result, the present research has been done to compare the iranian ventilation tube with their imported semblable in aspect of time of extrusion after surgery. Diagnosing chronic otitis serous, 80 patients below 14 yr, who were simply selected and confirmed by examine and bilateral B- type tympanogram . 160 ventilation tubes were inserted totally. Among of them, four patients were omited, because of their absence. To compare remaining time of ventilation tubes we inserted imported V.T shepard, in right ear and iranian V.T. pariz, in left ear. This research was a clinical trial and T-Test was the statistics test which was used. The average time of tube extrusion of iranian V.T was 6.2=1.6 months and for the other was 7.3=1.5 (p<0.001). The results showed that imported V.T was more effective and the iranian one in case of short time ventillation for middle ear in about one or two seasons can be utillzed. It is imagin that the lower remain time of iranian V.t. pariz, versus the shepard was because of its design and existence of irregularity in its structure, which can be hopefully used effectively by solving its faults.