Surgical masks
AssigneeLaporte Industries Limited
InventorAlan Dyer
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Abstract
It has already been suggested that chronic exposure of humans to nitrous oxide is a potential health hazard. There is especial concern for those working in the vicinity of a patient to whom nitrous oxide is administered as an anaesthetic. The present invention provides a disposable surgical mask characterized in that a layer comprising particles of a molecular sieve based on silicon dioxide and having an affinity for nitrous oxide is disposed between adjacent layers of the mask. Wearing such a mask reduces personal exposure to nitrous oxide.
Claims11
An improved disposable surgical mask of the type comprising at least two layers, wherein the improvement comprises a layer comprising particles of a molecular sieve based on silicon dioxide and having an affinity for nitrous oxide, which layer is disposed between two adjacent layers of the mask, said particles being present in said layer in an amount of not more than 50 grams.
Dependencies are inferred from the claim text.