PROBLEM TO BE SOLVED: To reduce the time required for the inspection of a connecting part by reducing the number of parts easily detachable, and to enhance safety by reducing the probability of the detachment of the connecting part.SOLUTION: An artificial ventilation apparatus includes: a connecting portion 11 which is connected to a respiratory system of a patient an inspiratory circuit 12 which is a flow path for making a gas from a ventilator 10 flow to the connecting portion 11 an expiratory circuit 13 which is a flow path for guiding the gas exhausted from the connecting portion 11 to an exhaust tube 17 of the ventilator 10 an expiratory valve 15 which blocks a flow of the gas from the exhaust tube 17 to the side of the connecting portion 11 a carbon dioxide concentration sensor 16 which is provided in a circuit on the downstream side of the expiratory valve 15 and detects a carbon dioxide concentration and an alarm outputting means which outputs an alarm based on the output of the carbon dioxide concentration sensor 16.COPYRIGHT: (C)2012,JPO&INPIT【課題】容易に着脱可能な部分の数を減らして接続部の点検に掛かる時間を減少させ、更に接続部の外れる確率を減少させて安全性を高める。【解決手段】患者の呼吸器系と連絡する連絡部11と、人工呼吸器10からのガスを前記連絡部11へ流す流路である吸気回路12と、前記連絡部11から排気されるガスを前記人工呼吸器10の排気管17へ導く流路である呼気回路13と、前記排気管17から前記連絡部11側への流れを遮断する呼気弁15と、前記呼気弁15より下流の回路に設けられ、二酸化炭素濃度を検出する二酸化炭素濃度センサ16と、前記二酸化炭素濃度センサ16の出力に基づきアラームを出力するアラーム出力手段とを具備する。【選択図】図1
