PROBLEM TO BE SOLVED: To provide an air leak monitoring device capable of providing information useful for grasping a patients air leak state to a medical worker.SOLUTION: An air leak monitoring device includes a pressure sensor 15 for measuring pressure in a suction circuit connected to a patients thoracic cavity, a display device 17 capable of displaying predetermined information, and a control unit 16 for performing calculation using the pressure measured by the pressure sensor 15. The control unit 16 includes a negative pressure calculation part 20 for calculating a minimum value of a negative pressure or a value close to it as a minimum negative pressure value NPmin based on the pressure for each predetermined time measured by the pressure sensor 15, and an output control part 26 for causing the display device 17 to output at least one of minimum negative pressure information Imin in which the minimum negative pressure value NPmin calculated by the negative pressure calculation part 20 is associated with the time, and minimum negative pressure-related information RImin related to the minimum negative pressure information Imin.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2016,JPO&INPIT
