An apparatus that assists in sterilizing an endoscope inside a sterilizer employing a gaseous sterilant, e.g., hydrogen peroxide, is disclosed. The apparatus may include a dry booster and a flow restrictor that includes two tubes, which may be connected to channels of an endoscope and the dry booster. The flow restrictor may be used to change the flow rates through the channels to assist in delivering sterilant throughout the channels.揭示一種設備,該設備在採用氣體滅菌劑(例如過氧化氫)的滅菌器內部協助對內視鏡進行滅菌。該設備可包括一乾式助推器及一流量限制器,該流量限制器包括兩個管,其等可連接至一內視鏡的通道及該乾式助推器。該流量限制器可用於改變通過通道的流率,以協助在整個通道中遞送滅菌劑。