[Canalplasty for inlay myringoplasty].

OBJECTIVE

To explore the effect of the canalplasty for inlay myringoplasty.

METHOD

A retrospective study was performed on 125 patients (130 ears) who underwent canalplasty and myringoplasty for the treatment of the chronic otitis media. The postauricular incisions was made, then the separation of the flap of posterior canal skin and the tympanic membrane epithelium, mill addition to part of the canal bone of the top, bottom, behind. Lift forward on the anterior canal skin, until the formation of the external auditory canal skin tube. Metal sheets was used to protect the skin tube, mill addition to the prominent bone of the anterior canal, reveal the tympanic anulus fully. Explore the ossicular chain activities, fascia covering the canal and fiber layer surface of the drum remnant was used as an inlay graft, and the canal skin was replaced. The canal was filled with hemostatic gauze and hemostatic sponge. Stitches a week after surgery. Removal of filling material in the external auditory canal two weeks after surgery, and re-filling with sterile gauze until healed.

RESULT

All 125 patients had successful grafts with 100% survival rate and healed in stage I. Average improvement in air-bone gap for all patients was 8.9 dB. Stenosis of the external auditory canal and lateralization of the grafted drum did not occur. Follow-up was conducted for 1-3 years. Three ears had reperforation and eight ears had late atelectasis. Fifteen ears had myringitis and healed by halometasone cream.

CONCLUSION

Canalplasty is an important surgical procedure on inlay myringoplasty. It can make the narrow and curved canal to large, eliminate the prominent bone of the anterior wall, expose the perforation edge fully, further facilitate the survival of the graft and post-operative care.