An adjustable airflow diffuser for selectively diffusing a flow of a treatment gas includes a first member disposed in a flow and a second member movably coupled to the first member and disposed in the flow And a second member. The second member comprises: (i) a first position relative to a first member in which the first member and the second member form a first turbulent flow arrangement, and (ii) a second position in which the first member and the second member And a second position relative to the first member forming a second turbulent flow arrangement.治療ガスの流れを選択的に拡散するための調整可能なエアフローディフューザは、流れの中に配置される第１の部材と、第１の部材に移動可能に結合され、流れの中に配置される第２の部材とを含む。第２の部材は、（ｉ）第１の部材と第２の部材とが第１の乱流アレンジメントを形成する第１の部材に対する第１の位置と、（ｉｉ）第１の部材と第２の部材とが第２の乱流アレンジメントを形成する第１の部材に対する第２の位置とで、選択的に移動可能である。
