An anti-reflux nasogastric tube device comprising: a tube body for feeding food into the stomach, an inflation unit, a countercurrent monitoring unit, and a signal processing unit. The inflating unit has an air bag located above the cardia of the stomach and surrounding the tube body, and a gas generator for expanding the air bag to abut against the inner wall of the esophagus, the countercurrent monitoring unit having two mounted on the tube body a light guiding strip, a light emitter, and a light receiver, each light guiding strip having a monitoring end extending into the esophagus, the signal processing unit having a processor having a light and the light A countercurrent monitoring module connected to the emitter and the light receiver. The cooperation of the foregoing structure can monitor and prevent the flow of stomach material through the esophagus.一種抗逆流鼻胃管裝置，包含：一個可將食物送入胃部的管本體、一個充氣單元、一個逆流監測單元，以及一個訊號處理單元。該充氣單元具有一個位於胃部之賁門上方並圍繞該管本體的氣囊，以及一個可使該氣囊膨脹而向食道內壁靠合的氣體產生器，該逆流監測單元具有兩條安裝在該管本體上的導光條、一個光發射器，以及一個光接收器，每個導光條都具有一個伸入食道內的監測端，該訊號處理單元具有一個處理器，該處理器具有一個與該光射器及該光接收器連接的逆流監測模組。前述結構的配合，可以監測並防止胃部物質逆流通過食道。
