Patent ID: 9155455
Filing Date: 2015-10-13
Classification: A61B

Abstract:
1. An endoscope gas delivery system delivering a gas from a conduit connection portion connected with a gas supply tube of a universal cord to an endoscope including an insertion section inserted into a body of a subject, a main body manipulation section continuous to the insertion section, and the universal cord connected to the main body manipulation section, the endoscope gas delivery system comprising: a pressurized air supply device comprising an air pump that generates a pressurized air and supplies the pressurized air to the conduit connection portion; a pressurized air supply flow rate adjusting unit that adjusts a supply flow rate of the pressurized air by controlling the air pump; a gas cylinder that supplies a gas to the conduit connection portion; a depressurizing mechanism that depressurizes the gas; a flow rate control valve that is provided adjacent to an outlet of the depressurizing mechanism and adjusts a flow rate of the gas; a gas supply control section that controls the flow rate control valve; a pressure gauge that is provided adjacent to an inlet of the depressurizing mechanism, measures a pressure of the gas and transmits a pressure signal which indicates an output pressure of the gas to the gas supply control section; and a gas switching control section that controls the pressurized air supply flow rate adjusting unit and the gas supply control section, delivers one of the pressurized air and the gas to the conduit connection portion, and performs a switching control using a supply flow rate setting value of the other of the pressurized air and the gas before the switching, wherein when the pressure of the pressure gauge becomes a first value PS when the gas switching control section receives the gas switching signal, the gas switching control section controls the flow rate control valve by controlling the gas supply control section in order to stop the supply of the gas, and drives the air pump by controlling the pressurized air supply flow rate adjusting unit to switch the gas to the pressurized air automatically which is supplied to the conduit connection portion.