PROBLEM TO BE SOLVED: To perform a digestive tract function inspection such as functional dyspepsia (FD) inspection and irritable bowel syndrome (IBS) inspection easily and in detail.SOLUTION: A gas feeding device comprises: a gas feeding duct communicating with a gas feeding source for feeding a gas into a digestive tract of a subject pressure detection means for detecting a pressure inside the digestive tract flow-rate adjustment means for adjusting a flow rate of the gas fed into the digestive tract through the gas feeding duct from the gas feeding source first control means for controlling the flow-rate adjustment means based on a detection result of the pressure detection means and feeding the gas into the digestive tract so that the inside of the digestive tract becomes a predetermined pressure second control means for controlling the flow-rate adjustment means based on a volume of the digestive tract and feeding a sufficiently small constant amount of the gas into the digestive tract in consideration of the volume of the digestive tract and gas feeding mode switch means for switching between a plurality of gas feeding modes including a first gas feeding mode for executing the control by the first control means and a second gas feeding mode for executing the control by the second control means.COPYRIGHT: (C)2015,JPO&INPIT【課題】、機能性ディスペプシア(FD)や過敏性腸症候群(IBS)などの消化管機能検査を容易かつ詳細に行う。【解決手段】気体供給源に連通して、被検体の消化管内に気体を供給するための送気管路と、消化管内の圧力を検出する圧力検出手段と、気体供給源から送気管路を介して消化管内に供給される気体の流量を調整する流量調整手段と、圧力検出手段の検出結果に基づき流量調整手段を制御して、消化管内が所定圧力となるように気体を消化管内に供給する第1の制御手段と、消化管の容積に基づき流量調整手段を制御して、消化管の容積に対して十分に小さい一定量の気体を消化管内に供給する第2の制御手段と、第1の制御手段による制御を実行する第1の送気モードと、第2の制御手段による制御を実行する第2の送気モードとを含む複数の送気モードを切り替える送気モード切替手段と、を備える。【選択図】図7
