Effects of Noise and Chemical Exposure on Peripheral and Central Auditory Pathways in Normal-hearing Workers.

Objectives: To assess the effects of noise and chemical exposure on peripheral and central auditory pathways in normal-hearing workers exposed to chemicals or high noise levels and compare the groups with each other and with workers not exposed to either of these agents.

Methods: A total of 54 normal-hearing workers were divided into three groups (chemical, noise, control) and submitted to the following assessments: conventional and extended high-frequency pure-tone audiometry; transient and distortion-product otoacoustic emissions, the inhibitory effect of the efferent auditory pathway; and Staggered Spondaic Word (SSW) and Pitch Pattern Sequence (PPS) test.

Results: There were no significant differences between the groups in extended high-frequency hearing thresholds.

Congenital Pulmonary Airway Malformation in an Adult Male Presenting With Hemoptysis.

Congenital pulmonary airway malformations (CPAMs) are rarely encountered in the adult population. Although they are typically diagnosed in the prenatal period, some may not cause symptoms and go unnoticed until adulthood. Patients with CPAM are at risk of developing pneumonia, hemorrhage, pneumothorax, and malignancy.

Longitudinal evaluation of a hearing protector fit training program.

Objective: The present study evaluates a training program for fitting different hearing protection devices (HPDs) based on personal attenuation rating (PAR) before, immediately after, and six months after training.

Methods: A total of 67 workers from a public university in the city of São Paulo, Brazil, were invited to participate in the measurement of PARs for foam and silicone protectors through the 3M™ E-A-Rfit Validation System. Two evaluations were performed for each protector at each sampling date: one after reading printed material (the package instructions) and another after being trained by an audiologist.

An unusual case of hypercapnic respiratory failure.

Asphyxiating thoracic dystrophy (ATD also known as Jeune syndrome) is a very rare disorder with an incidence in the United States of 1 case per 100,000-130,000 live births. Chronic alveolar hypoventilation leading to concurrent hypoxia is the main cause of morbidity and mortality in these patients due to its complications. A 22-year-old male with past medical history of ATD and severe kyphoscoliosis presented with progressively worsening shortness of breath for several days.