A nonrandomized comparison of potassium titanyl phosphate and CO2 laser fiber stapedotomy for primary otosclerosis with the otology-neurotology database
✍ Scribed by Robert Vincent; Wilko Grolman; John Oates; Neil Sperling; Maroeska Rovers
- Publisher
- John Wiley and Sons
- Year
- 2010
- Tongue
- English
- Weight
- 227 KB
- Volume
- 120
- Category
- Article
- ISSN
- 0023-852X
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✦ Synopsis
Objectives/Hypothesis: To compare short-term hearing results in patients undergoing laser stapedotomy for primary otosclerosis using either the flexible potassium titanyl phosphate (KTP) or CO 2 laser fiber.
Study Design: Prospective nonrandomized clinical study at a tertiary referral center.
Methods: Two hundred fourteen patients undergoing 214 stapedotomies for otosclerotic stapes fixation were enrolled in this study from January 2008 to January 2009. Comparative analyses were made between a group of 107 patients who underwent stapedotomy with the flexible KTP laser fiber and 107 patients who underwent stapedotomy with the flexible CO 2 laser fiber. Preoperative and postoperative audiometric evaluation at 3 months using conventional audiometry, namely, air-bone gap (ABG), boneconduction thresholds, and air-conduction thresholds, were assessed.
Results: In the KTP laser group the postoperative ABG was 4.3 dB compared to 3 dB in the CO 2 group, which is a mean difference of 1.3 dB (95% confidence interval [CI], À0.3 to 2.8; P ¼ .10). Of the patients from the KTP group, 92% had a postoperative ABG of 10 dB or less, as compared to 97% in the CO 2 group (mean difference 5%; 95% CI, -10 to 1; P ¼ .14). The postoperative ABG at 4 kHz was 4.9 dB in the KTP and 2.2 dB in the CO 2 group, which is a mean difference of 2.7 dB (95% CI, 0.6-4.7, P ¼ .01). No sensorineural hearing loss was reported.
Conclusions: The use of the CO 2 laser fiber appears to be associated with slightly better hearing results than the KTP laser fiber, especially when assessed at the 4 kHz frequency.