RESUMEN Introducción: El tratamiento de la otitis media crónica (OMC) colesteatomatosa es quirúrgico, cuyo objetivo es erradicar la enfermedad, evitar complicaciones y prevenir recurrencias. El gold standard es la timpanomastoidectomía con canal wall down (TCWD). Estudios en cadáver han definido que TCWD disminuye la audición 1-5 dB en frecuencias <1.000 Hz y 0-10 dB entre 1.000 y 3.000 Hz. De aquí nuestro interés por definir la influencia acústica de la pared posterosuperior del conducto auditivo externo (CAE). Objetivo: Determinar en cuantos decibeles se corrige la audición al reconstituir pared posterior del CAE pos-TCWD. Material y método: Trabajo experimental. A pacientes pos-TCWD se reconstituye de manera transitoria la pared posterior del CAE, realizándose audiometría pre y posprocedimiento. Resultados: 23 pacientes (25 oídos), promedio 48,8 años (18-72 años). En 96% existió una diferencia favorable al reconstruir la pared posterior, presentando una mejoría auditiva entre 1,2 y 10,6 dB (4,2 ± 2,8 dB). En frecuencias <1.000 Hz la mejoría fue de 6,0 dB (p <0,001), entre 1.000-3.000 Hz fue 2,6 dB (p <0,001) y >3.000 Hz no hubo diferencia. Considerando PTP de vía aérea la mejoría fue 4,6 dB (p <0,001). Conclusión: Nuestro estudio demuestra que existe mejoría auditiva en la gran mayoría de oídos evaluados al reconstituir la pared posterosuperior del CAE, alcanzando 6 dB en frecuencias <1.000 Hz y 2,6 dB en frecuencias medias. Si consideramos los PTP de vía aérea la mejoría es de 4,6 dB en presencia de pared posterior.
ABSTRACT Introduction: Cholesteatomas treatment is surgical and the goals are complete resection of it, to prevent complications and recurrences. The gold standard operative technique is canal wall down tympanomastoidectomy (CWDT), which reduces the recurrence rate lower than 2%. Studies on human temporal bones have defined that CWDT causes a decrease of 1 to 5 dB at frequencies below 1000 Hz and 0 to 10 dB between 1000 and 3000 Hz. Aim: To determine how many decibels the hearing is improved by reconstituting the posterior wall of the ear canal (EC) in patients after CWDT. Material and method: Experimental study. In patients after CWDT, the posterior wall of EC was reconstructed temporarily. Audiometry was performed before and after the procedure. Results: 23 patients were enrolled (25 ears evaluated). Average age 48.8 years (range 18 to 72 years). In 96% of the ears there was a difference after the procedure with a hearing improvement of 4.2 ± 2.8dB. In frequencies below 1000 Hz, hearing improvement was 6.0 dB (p<0.001), between 1000-3000 Hz, the improvement was 2.6 dB (p<0.001) and >3000 Hz there was no difference. When considering the airway-conduction pure tone average (PTA), the difference was a 4.6 dB improvement (p<0.001). Conclusions: Our study shows that there is a hearing improvement in the vast majority of ears that were evaluated by reconstituting the posterior wall of the EC, reaching a gain of 6 dB at frequencies <1000 Hz and 2,6 dB at mid frequencies. Considering the airway PTA, the improvement is 4.6 dB in the presence of posterior canal wall.
http://bit.ly/2IeUJ7h
Σφακιανάκης Αλέξανδρος
ΩτοΡινοΛαρυγγολόγος
Αναπαύσεως 5 Άγιος Νικόλαος
Κρήτη 72100
00302841026182
00306932607174
alsfakia@gmail.com
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- Transient Tachypnea of Newborns Is Associated With...
- Consensus Statement of the Malignant Hyperthermia ...
- In Response
- Perioperative Epidural Use and Risk of Delirium in...
- Proposal for a Revised Classification of the Depth...
- Clot Retraction: Lost in Interpretation?
- American Society for Enhanced Recovery and Periope...
- Randomized Trial Comparing Early and Late Administ...
- Managing Complications in Paediatric Anaesthesia
- Drug Calculation Errors in Anesthesiology Resident...
- Fluorescence‐Advanced Videodermatoscopy: A promisi...
- Fluorescence‐Advanced Videodermatoscopy: A promisi...
- Pituitary crush
- A 14‐year review of a UK teledermatology service: ...
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- Pentito
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- Evaluating Risks and Benefits of Evolving Systemic...
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- Ageing profiles of Caucasian and Chinese cohorts –...
- Identification of the recently described plasminog...
- Parotidectomy in patients with head and neck cutan...
- Acknowledgment of Reviewers 2018
- Decreased ciliary beat responsiveness to acetylcho...
- Hearing interventions to prevent dementia
- Veiled Potential of Secretagogin in Diabetes: Corr...
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