Institutions Represented at the Conference Saitama Prefectural Medical College (Pediatrics)
Toho University (Pediatrics)
Morioka National Sanitorium Hospital (Pediatrics)
Topic Examining Air Purifiers for Pediatric patients with allergies and the usefulness of the SilentAir Air Purifier.
The following is a translation of excerpts taken from the presentation in September 1994.
Purpose The importance of creating an allergen-free environment is crucial in the treatment of pediatric bronchial asthma and allergic rhinitis. Despite this fact, it has been found that, in some instances, interior airborne dust cannot be totally eliminated simply by maintaining the environment by traditional methods. For the purposes of this experiment, the Silentair Air Purifier was implemented and the subsequent results are set out below.
Subjects and Method The subjects of this experiment were 12 pediatric out-patients of the Pediatric Allergy Unit of Saitama Medical College and who range in age from 4 to 15 years. All patients have bronchial asthma and allergic rhinitis. After a two week observation period, during which time a SilentAir Air Purifier (which has the ability to collect minute dust particles from 40 microns to as small as 0.0001 microns) was in use, changes in the symptoms of these afflicted pediatric patients were noted. In two families, not only were the patient's symptoms being observed, but actual changes in the level of mite allergens, the precipitation bacteria count and the airborne dust particles were measured in the rooms using a Dustchecker (Bioscience Co. Ltd.).

The number of attacks suffered by children with bronchial asthma were as follows:

Week 1 Week 2 Week 3 Week 4 Week 5
20% 11.9% 3.6% 1.2% 0.5%
    In case of rhinitis, the mucus index was as follows:
Week 1 Week 2 Week 3 Week 4 Week 5
80-90% 56% 53.6% 28.6% 9.5%

There was reduction to 0.020 mg/m3 at Week 2 and 0.015 mg/m3 at Week 4. The total number of precipitating bacteria also decreased. The interior mite allergen number also decreased from 2.1 ug/m2 at Week 2 to 1.8 ug/m2 at Week 4.


It appears that the SilentAir Air Purifier is an effective method in the treatment of pediatric asthma and rhinitis.


With respect to the children with bronchial asthma, the results of using the SilentAir Air Purifier indicated a definite trend of a reduced number of attacks as well as significantly reduced coughing. For those with allergic rhinitis, there was a reduction in the volume of mucus and the degree to which their nasal passages were congested. Over 80% of these patients showed marked breathing improvement during the observation period as a result of the SilentAir Air Purifier greatly reducing the number of dust particles in the environment.

The difference between filtering air and purifying it.