One hundred and fifty one cases (154 ears, 159 perforations) of traumatic drum perforation are studied for the analysis of clinical finding. All of the cases came from Kyungpook National University Hospital beween the year of 1962 to 1971.
Results:
1. The yearly increment is not apparent but the seasonal variation indicates that the most frequent occurence of perforation is on summer season.
2. As an etiological factor, the indirect trauma occupies the most cases (93.6%), out of which, 94.4% is by assault.
3. As is expected, left side is more frequently involved (69.6%), and its more so in the case of indirect trauma.
4. Age distribution indicates 20´ s (51.0%), 30´ s (20.5%), 10´ s in the declining order, male to female cases found in 30´s.
5. Occupationally, unemployed is the most frequently involved, student and house wife are in the next order. Poor hearing is the most frequently complained, and otalgia, tinnitus is in their next order.
6. The central portion of anterior inferior and posterior inferior quadrant is the most frequent site of perforation, and medium sized, irregular round and triangular shape is most frequently seen.
7. Average 15 to 25 dB, of hearing loss is recorded, and the degree of loss is well correlated with the size of perforation.
8. Two ways of therapeutic measure are compared to see the process of the perforation healing and hearing recovery.
a) Stimulation therapy: The perforation healing takes about 3 weeks in the medium sized perforation, and hearing recovery tends to be more slower than next closing procedure.
b) Closing procedure with internal membrane of the egg: Hearing recovery is much enhanced.
(13. 4 dB is recovered on next day of the procedure, and 17. 2 dB by the end of the third week.)
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