PROBLEM TO BE SOLVED: To allow for aspiration of high concentration oxygen without re-breathing carbon dioxide by a low flow rate of oxygenation.SOLUTION: An airtight-type oxygen mask (1) is provided with: a reservoir bag (2) connected to a carbon dioxide removal filter (3) and a one-way valve (4) adjusted to open in aspirating, thereby supplying oxygen.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2017,JPO&INPIT【課題】低流量の酸素投与で、二酸化炭素を再呼吸することなく、高濃度の酸素の吸入を可能とする。【解決手段】密閉型酸素マスク(1)に二酸化炭素除去フィルター(3)を接続したリザーバーバッグ(2)と呼気時に開放する一方弁(4)を設け、酸素を供給する。【選択図】図1
