Patent ID: 7722559
Filing Date: 2010-05-25
Classification: A61B,A61M

Abstract:
1. A gas supply apparatus for a first body cavity and a second body cavity of a patient, the first and second body cavities being different from each other, the apparatus comprising: a supplying unit that supplies predetermined gas; a pressure regulator that regulates a pressure of the predetermined gas supplied from the supplying unit based on either a first pressure setting value or a second pressure setting value such that the predetermined gas with its pressure regulated based on the first pressure setting value is supplied to the first body cavity or the predetermined gas with its pressure regulated based on the second pressure setting value is supplied to the second body cavity of the patient, the first pressure setting value being suitable for an inside of the first body cavity, the second pressure setting value being suitable for an inside of the second body cavity; a first flow adjuster that adjusts a flow of the predetermined gas regulated by the pressure regulator to the first body cavity; a second flow adjuster that adjusts a flow of the predetermined gas regulated by the pressure regulator to the second body cavity; a first pressure measuring unit that measures a pressure of gas inside the first body cavity; a second pressure measuring unit that measures a pressure of gas inside the second body cavity; and a controller that: controls the pressure regulator and the first flow adjuster based on a pressure value measured by the first pressure measuring unit to thereby match the pressure value measured by the first pressure measuring unit with the first pressure setting value, controls the pressure regulator and the second flow adjuster based on a pressure value measured by the second pressure measuring unit to thereby match the pressure value measured by the second pressure measuring unit with the second pressure setting value, calculates a rate of pressure-rise inside the second body cavity based on the pressure value measured by the second pressure measuring unit while the predetermined gas, with its pressure being regulated based on the second pressure setting value, is being supplied to the second body cavity of the patient, and reduces the first pressure setting value suitable for the inside of the first body cavity when the calculated rate of pressure-rise inside the second body cavity is lower than a preset threshold value.