In managing patients by canal wall down mastoidectomy. we must ensure
good ventilation of the depths of the mastoid cavity, which can be
obtained only by a meatoplasty or a correct meatoconchoplasty.
After a follow up period of six months duration for 20 cholesteato matous
patients managed by C.W.D. mastoidectomy with either meatoplasty
or meatochoncoplasty. A/ V ratio has a significant value in relation to
the state of the mastoid cavity (dry or wet). Neither area of meatal opening(
A) nor volume of the mastoid cavity (V) is significant separately.
Healing process reduces the area of meatoplasty or rneatoconchoplasty
by about 20%. No significant difference between healing ratio for meatoplasty
and that for meatochoncoplasty. Meatoplasty or meatochoncoplasty
opening tends to become more circular during healing.
Simple scales and some suggestions for practical measuring of proper
diameter for meatoplasty and meatochoncoplasty in order to achieve a
dry cavity had been done. |
