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  • Title: Lateral graft type 1 tympanoplasty using AlloDerm for tympanic membrane reconstruction in children.
    Author: Lai P, Propst EJ, Papsin BC.
    Journal: Int J Pediatr Otorhinolaryngol; 2006 Aug; 70(8):1423-9. PubMed ID: 16574249.
    Abstract:
    OBJECTIVES: To describe the lateral graft type 1 tympanoplasty technique using AlloDerm for tympanic membrane reconstruction in children and to compare its surgical and audiometric outcomes with the traditional underlay type 1 tympanoplasty. METHODS: The records of 34 consecutive children undergoing type 1 tympanoplasty between 2004 and 2005 were reviewed; 18 received lateral graft tympanoplasty with AlloDerm and 16 received underlay tympanoplasty (8 AlloDerm and 8 temporalis fascia). Pre- and post-surgical audiograms, speech reception threshold, closure rate and complication rate were evaluated using one-way and repeated measures ANOVAs. RESULTS: Children who underwent lateral graft type 1 tympanoplasty pre-operatively had larger tympanic membrane perforations, worse pure tone averages, air bone gaps and speech reception thresholds as compared with children undergoing underlay type 1 tympanoplasty (P<0.001). Pure tone averages and air bone gaps improved significantly with surgery in both lateral and underlay type 1 tympanoplasty groups (P<0.05), with both groups achieving comparable postoperative audiometric outcomes (P>0.01). The lateral graft group demonstrated a higher perforation closure rate (94%) as compared with both underlay groups (88%). Complication rates were virtually non-existent. CONCLUSIONS: Despite larger perforations and worse pre-operative audiometric scores, children who underwent lateral graft type 1 tympanoplasty achieved comparable postoperative audiometric results and perforation closure rates as compared with children who underwent underlay type 1 tympanoplasty. Results suggest that lateral graft type 1 tympanoplasty using AlloDerm is effective for tympanic membrane reconstruction in children and should be used when temporalis fascia is not available or the extent of the perforation limits its use.
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