title: Effects of packing on the postoperative hearing after middle ear surgery.
abstract: CONCLUSIONS
  The changes of hearing by packing after middle ear surgery should be anticipated and carefully interpreted.
  
  
  OBJECTIVE
  To evaluate the amount and patterns of hearing loss resulting from packing in middle ear cavity (MEC) and external auditory canal (EAC) after middle ear surgery.
  
  
  METHODS
  We obtained pure tone thresholds by bone (BC) and air conduction (AC) up to 12 weeks after middle ear surgery in 17 patients who had minimal middle ear pathology. To observe the effects of packing only in the EAC as in cases of explorative tympanotomy or stapes surgery, BC and AC threshold were obtained after packing only in the EAC in 18 volunteers. The changes of BC and AC thresholds in terms of pure tone average (PTA) and high frequency PTA were analyzed.
  
  
  RESULTS
  PTA by AC increased significantly by a maximal value of 38.7 dB at the second postoperative day, by 35.0 dB at 1 week after middle ear surgery. PTA by BC also increased maximally at the second postoperative day by 4.8 dB. The elevation of BC threshold at high frequencies (2, 3, 4 kHz) was more pronounced. Packing of EAC without MEC packing resulted in elevation of AC threshold by 43.0 dB, with similar patterns of BC threshold changes as MEC and EAC packing.
authors: Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea. yscho@smc.samsung.co.kr
authors: Yang-Sun
authors: YS
authors: Cho
authors: Hyun-Seok
authors: HS
authors: Lee
authors: Sung Hwa
authors: SH
authors: Hong
authors: Won-Ho
authors: WH
authors: Chung
authors: Jin-Young
authors: JY
authors: Min
authors: Soo Jin
authors: SJ
authors: Hwang
mesh_terms: D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D001844:Bone Conduction; D004431:Ear, External; D004432:Ear, Middle / Q000601:surgery*; D005260:Female; D005781:Gelatin Sponge, Absorbable; D006314:Hearing Loss, Conductive / Q000209:etiology; D006490:Hemostatics; D006801:Humans; D008297:Male; D008875:Middle Aged; D011184:Postoperative Period
chemical_list: D006490:Hemostatics