Long term development of the air-bone gap after primary- and revision-CO2- Laser-Stepedotomy

In our study, we have shown that after CO2-revision-laserstapedotomy (R-LS), similarly good results are achieved in terms of the air-bone-gap (ABG) reduction, as after primary (P-LS) CO2-laser-stapedotomy.

We used the one-shot technique, which has been used routinely in our clinic for 15 years. There are only a few studies on long-term follow-ups after PLS and R-LS.

We were able to show that in the long-term course of CO2-R-LS comparable hearing improvements could be achieved as in the CO2-P-LS.

Our database contained 533 P-LS and 141 R-LS with audiograms up to 12.5 years postoperatively. This allowed us to examine the ABG at different times.

One year postoperatively, there was a significant reduction in ABG in both groups R-LS: 0-10 dB 48 %, 11-20 dB 46 %, 21-30 dB 6 % P-LS: 0-10 dB 73 %, 11-20 dB 26 %,> 30 dB 1 % As time passed, our studies showed no significant change in ABG in both group. Conpared to the preoperative values there was no significant difference between in both groups at one time, but at all other times.

The stable postoperative ABG after P-LS and R-LS in the long-term course could therefore confirm the results for the previously published short-term favorable course of P-LS and R-LS.

We conclude that patients benefits from both a P-LS and an R-LS in the long-term. Especially the R-LS can not only improve the symptoms but also the hearing improvement.

The Author has not actual or potential conflict of interest in connection with the submitted article.

Poster-PDF A-1579.PDF

Publication History

Article published online:
10 June 2020