Validation of the Nasal Obstruction Symptom Evaluation Scale in Mexican Adults.

Background: Nasal obstruction is a feeling of impaired airflow through the nose, caused by diverse factors with high prevalence. There are numerous methods to study it, being the most important subjective instrument the Nasal Obstruction Symptom Evaluation score, NOSE, with good structural validity and internal consistency. It has been translated and validated in several languages, including European Spanish, but hasn't been validated in Mexico.

Incidence and management of gusher in cochlear implantation.

Objective: To present a report on the incidence and management protocol of cerebrospinal fluid gusher in cochlear implantation in the national institute of respiratory diseases.

Method: We conducted a clinical, longitudinal, retrospective investigation of all the medical charts from implanted patients between October 1999 and December 2016 in the national institute of respiratory diseases to evaluate the incidence of gusher, management protocol and evolution after surgery. Statistical analysis was conducted using Fishers test to find out if there was a relationship between the number of inner ear malformations and gusher severity and between the surgical access to the inner ear (cochleostomy or round window) and gusher severity.

Effect of Probe-Tone Frequency on Ipsilateral and Contralateral Electrical Stapedius Reflex Measurement in Children With Cochlear Implants.

Objectives: The upper loudness limit of electrical stimulation in cochlear implant patients is sometimes set using electrically elicited stapedius reflex thresholds (eSRTs), especially in children for whom reporting skills may be limited. In unilateral cochlear implant patients, eSRT levels are measured typically in the contralateral unimplanted ear because the ability to measure eSRTs in the implanted ear is likely to be limited due to the cochlear implant surgery and consequential changes in middle ear dynamics. This practice is particularly limiting in the case of fitting bilaterally implanted pediatric cases because there is no unimplanted ear option to choose for eSRT measurement.

Refinement of the nasalisation technique for nasal polyposis.

Background: Radical ethmoidectomy for nasal polyposis (nasalisation) tends to offer better results than functional ethmoidectomy in terms of recurrence. We have been performing the nasalisation technique since 2004, but late complications such as mucoceles were noted in several patients. We implemented some modifications to the nasalisation technique in order to reduce the complication rate while obtaining a similar recurrence rate.

Localization and level of expression of beta-catenin in human laryngeal squamous cell carcinoma.

Objective: We studied the participation of beta-catenin in the histologic differentiation of laryngeal squamous cell carcinomas.

Study Design And Setting: At the National Institute of Respiratory Diseases, a tertiary referral center, localization and level of expression of beta-catenin were compared between normal epithelium (15 cases) and primary tumors in different degrees of differentiation (38 cases), using an immunohistochemical procedure.

Results: Cell membrane staining of beta-catenin was observed in normal epithelium and in well and moderately differentiated carcinomas.