Outcome of myringotomy with ventilation tube for otitis media with effusion in Thai children: Ramathibodi experiences.

Objective: Study the otologic and audiologic outcome when using a ventilation tube (VT) for the treatment of otitis media with effusion (OME) in Thai children.

Material And Method: The medical records of twenty-three pediatric patients, 17 male and 6 female, aged 4 to 11 (mean age of 6.8 years), with the diagnosis of OME who attended the Department of Otolaryngology, Faculty of Medicine Ramathibodi Hospital, between January 2001 and December 2006 were reviewed.

Filtration efficiency of the ramathibodi nasal filter evaluated by rhinomanometry in high concentration level of laser smoke particle.

Under conditions with a high concentration level of laser smoke particles, the filtration efficiency of the Ramathibodi nasal filter was studied. Different kinds of filter material in the Ramathibodi nasal filter were evaluated in human adults with an anterior standard rhinomanometric method. The Ramathibodi nasal filter with three-layers of a half-face mask filter and a 4 mm thickness polyurethane foam put inside was applied in a simulated human airway.

Efficacy of the ramathibodi nasal filter in a simulated human airway evaluated by a laser diode portable dust monitor under low laser smoke particle concentration.

The Ramathibodi nasal filter attached to a simulated human airway was proposed to filter laser smoke particles. The simulated human airway composed of nasal and pharyngeal model, airway passage and lung model machine which mimicked the human respiratory system. The laser smoke particles represented a suspended particulate matter in a highly air-pollutted area such as at a main roadside in Bangkok.

Suspended particulate matter in an office and laser smoke particles in an operating room.

Suspended particulate matter in an office and laser smoke particles in a laser operative room of the Otolaryngology Department, Ramathibodi Hospital were compared. Suspended particulate matter sizes of PM15, PM10 and PM2.5 were selected due to their impact on health.

The Ramathibodi nasal filter in a simulated human airway: evaluated with laser smoke particles and a laser diode dust portable monitor.

The Ramathibodi nasal filter was specially designed as a personal respiratory protective device. It was attached to a simulated human airway composed of a nasal and pharyngeal model, airway passage and lung model machine. The system was run in a laser smoke particles environment.