Endoscopic type 3 tympanoplasty: Functional outcomes in chronic otitis media / Timpanoplastia endoscópica tipo 3: resultados funcionales en la otitis media crónica

ABSTRACT

BACKGROUND: Type 3 tympanoplasty is the surgery of choice for middle ear reconstruction in cases where an integral stapes suprastructure and mobile footplate are present. OBJECTIVE: The objective of this study was to obtain functional results after endoscopic type 3 tympanoplasty in chronic otitis media. MATERIALS AND METHODS: Prospective study including 24 patients who underwent endoscopic type 3 tympanoplasty, using PORP for ossicular chain reconstruction (OCR) and cartilage graft for tympanic membrane reconstruction. Audiograms were made preoperatively, and 6 months after surgery. RESULTS: Dry, closed, self-cleaning ears were obtained in 91.7% of the cases. Mean preoperative air-bone gap (ABG) was 30.4dB, mean postoperative ABG was 16.7 dB, dB gain of 13.6dB. ABG closure rate to 20 dB or less of 79.2%, and to 10 dB or less of 29.2%. CONCLUSION AND SIGNIFICANCE: Endoscopic tympanoplasty and OCR is a valid option for surgeons who are comfortable with the use of endoscopes for middle ear surgery as it allows improved visualization of the prosthesis and graft placement during middle ear reconstruction. BACKGROUND: Type 3 tympanoplasty is the surgery of choice for middle ear reconstruction in cases where an integral stapes suprastructure and mobile footplate are present. OBJECTIVE: The objective of this study was to obtain functional results after endoscopic type 3 tympanoplasty in chronic otitis media. MATERIALS AND METHODS: Prospective study including 24 patients who underwent endoscopic type 3 tympanoplasty, using PORP for ossicular chain reconstruction (OCR) and cartilage graft for tympanic membrane reconstruction. Audiograms were made preoperatively, and 6 months after surgery. RESULTS: Dry, closed, self-cleaning ears were obtained in 91.7% of the cases. Mean preoperative air-bone gap (ABG) was 30.4dB, mean postoperative ABG was 16.7dB, dB gain of 13.6dB. ABG closure rate to 20dB or less of 79.2%, and to 10dB or less of 29.2%. CONCLUSION AND SIGNIFICANCE: Endoscopic tympanoplasty and OCR is a valid option for surgeons who are comfortable with the use of endoscopes for middle ear surgery as it allows improved visualization of the prosthesis and graft placement during middle ear reconstruction

RESUMEN

INTRODUCCIÓN: La timpanoplastia tipo 3 es la cirugía de elección para la reconstrucción del oído medio en casos donde se encuentra íntegra la supraestructura del estapedio, y hay una platina móvil. OBJETIVOS: El objetivo de este estudio es obtener resultados funcionales tras timpanoplastias tipo 3 con abordaje endoscópico. MATERIALES Y MÉTODOS: Estudio prospectivo incluyendo 24 pacientes quienes fueron operados de timpanoplastia tipo 3 endoscópicas, usando una PORP como material de osiculoplastia, y cartílago como injerto de reconstrucción de membrana timpánica. Audiometrías tonales fueron hechas previas a la cirugía y 6 meses posterior a ella. RESULTADOS: Oídos cerrados, secos y autolimpiantes fueron obtenidos en el 91,7% de los casos. El GAP aéreo-óseo preoperatoria medio fue de 30,4 dB, la misma diferencia media postoperatoria fue de 16,7 dB. La reducción de GAP postoperatoria fue de 13,6 dB. La tasa de cierre de GAP a menos de 20dB o menos fue del 79,2% y a menos de 10 dB del 29,2%. CONCLUSIONES: La timpanoplastia y reconstrucción osicular con abordaje endoscópico es una técnica válida y segura cuando es usada por cirujanos que están cómodos con el uso de endoscopios en la cirugía de oído medio, como permite mejor visualización de la colocación de prótesis e injertos durante la cirugía