A medical apparatus is provided. The medical apparatus includes a mattress structure having at least one bladder. Each of the at least one bladder includes space defined by an upper surface, a lower surface and sidewalls. At least one conductive planar material is disposed on the upper surface of the bladder. At least one inductive sensor which connects to an operative circuit is disposed on the lower surface of the bladder, wherein the at least one inductive sensor detects the position of the at least one conductive planar material. Furthermore, a distance between the at least one inductive sensor and the at least one conductive planar material is thus calculated by the operative circuit. When the measured distance is less than a predetermined value, the operative circuit transmits a signal to a control unit triggering refill of gas to the bladder.本發明提供一種醫療設備,其包括一床墊結構,具有至少一氣囊,該氣囊由一上表面、一下表面、及側面所定義一空間。至少一導電性平面材料,設置於該氣囊的上表面,及至少一電感式感測器,設置於該氣囊的下表面,該至少一電感式感測器連接一運算電路,其中該至少一電感式感測器感測該至少一導電性平面材料的位置,經由該運算電路計算而得出該至少一電感式感測器與該至少一導電性平面材料之間的一距離。當該距離小於一預定值時,該運算電路傳送一訊號啟動一控制裝置填充氣體於該氣囊中。100‧‧‧床墊結構101‧‧‧外罩102‧‧‧底座110‧‧‧氣囊116~119‧‧‧交錯式控制條狀氣囊
