title: Prospective study of 100 cases of underlay tympanoplasty with superiorly based circumferential flap for subtotal perforations.
abstract: OBJECTIVE
  Underlay Tympanoplasty with superiorly based circumferential flap for dry subtotal perforations.
  
  
  METHODS
  A prospective study of cases with dry subtotal perforations, which underwent surgery between August 2001-Feb. 2004.
  
  
  METHODS
  Study was conducted on patients attending ENT OPD in S.M.S. Medical College and Hospital from August 2001-Feb. 2004 with dry subtotal perforations.
  
  
  RESULTS
  It was noted that 89% of the cases were in the age group of 11 to 40 years, while one case was of 7 years of age and 9% of cases were between the age of 41-50. 50% of the cases had dry ear for less than 3 months while 75% of cases had dry ear for less than 1 year. Graft take rate was 97% with completely healed tympanic membrane. Rejection of the graft was observed in 2% of the cases. Hearing gain of 10-30dB was achieved in 95% of the cases. 7% of the cases suffered minor complications like otitis media with effusion (2%) retraction (2%) and lateralization (1%).
  
  
  CONCLUSIONS
  Duration for which ear has been dry did not affect the results. 49% of cases had dry ear for less than 3 months, with good graft take up rate and hearing gain. Pneumatization of mastoids, had a direct relationship with, post operative hearing gain, which ranged from 10-30 dB, in 95% of the cases. We observed, 97% graft take rate. Rejection of the graft was found in only 2% of the cases. 97% of the graft take rate and good hearing gain in our study can be correlated with expertise technique to deal with subtotal perforations.
authors.affiliation: Deptt.of E.N.T. S.M.S Medical College & Hospital, Jaipur, 7/251 Vidydharnagar, Jaipur, 302 023 India.
authors.forename: Prakash
authors.initials: P
authors.lastname: Mishra
authors.forename: Nishi
authors.initials: N
authors.lastname: Sonkhya
authors.forename: Naveent
authors.initials: N
authors.lastname: Mathur
keywords: Subtotal perforation; Tympanoplasty; Underlay tympanoplasty