Influence of operatory size and nitrous oxide concentration upon scavenger effectiveness.
J Dent Res
; 70(9): 1286-9, 1991 Sep.
Article
em En
| MEDLINE
| ID: mdl-1918578
Concern regarding environmental health hazards for dental personnel chronically exposed to waste nitrous oxide (N2O) prompted this investigation. The influence on ambient N2O levels of scavenging, operatory size, and N2O concentration delivered to the patient was evaluated during treatment of 36 pediatric dental patients. The results showed that scavenging significantly reduced ambient N2O levels measured at 50-56 cm from the patient's nose. Scavenged ambient N2O levels were also observed to decrease when N2O concentrations administered to the patient were reduced from 50 to 30%. This concentration effect was not observed in the non-scavenged groups. ANOVA showed that operatory size exerted a non-significant influence on ambient N2O. The data collected during routine treatment of pediatric dental patients demonstrated that the scavenging system tested significantly reduced waste N2O in the operator's breathing zone, nearly approximating the 25-ppm recommendation established by the National Institute for Occupational Safety and Health (NIOSH).
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Base de dados:
MEDLINE
Assunto principal:
Salas Cirúrgicas
/
Resíduos
/
Depuradores de Gases
/
Poluentes Ocupacionais do Ar
/
Óxido Nitroso
Tipo de estudo:
Guideline
Limite:
Child
/
Child, preschool
/
Female
/
Humans
/
Male
País como assunto:
America do norte
Idioma:
En
Ano de publicação:
1991
Tipo de documento:
Article