Abstract: An airway adaptor includes: a gas passage into which a respiratory gas of a subject is to flow; a respiratory gas introducing portion which is configured to guide the respiratory gas expired from at least one of nostrils and a mouth of the subject, to the gas passage; and an airway case on which a temperature sensor that is configured to detect a temperature change of the respiratory gas flowing into the gas passage is mountable.

Abstract: An input interface is configured to receive a signal corresponding to a quantity of light that has passed through a living tissue of a subject. A pressurization controller is configured to control a pressurizing operation performed with a pressurization device attached to a body of the subject, thereby changing at least one of a thickness of the living tissue, an amount of blood contained in the living tissue, an amount of cellular interstitial fluid contained in the living tissue, an amount of blood flowing into the living tissue, and an amount of blood flowing out from the living tissue. A processor is configured to acquire, from a temporal change of the signal due to the pressurizing operation, a feature quantity that is used for estimating at least one of a physiological state of the living tissue and a disease state of the subject.

Abstract: A dehumidifier is connected to a respiratory gas measuring apparatus. A membrane dryer has a first flow path through which a respiratory gas of a subject passes, and a second flow path through which a purge gas passes. A first normally-closed electromagnetic valve is disposed in a first upstream flow path that communicates with the first flow path. A second normally-closed electromagnetic valve is disposed in a first downstream flow path that communicates with the first flow path. A third normally-closed electromagnetic valve is disposed in a second upstream flow path that communicates with the second flow path. A fourth normally-closed electromagnetic valve is disposed in a second downstream flow path that communicates with the second flow path.

Abstract: A system including a first sampling portion configured to sample inhalation gas made up of a first gaseous mixture, a second sampling portion configured to sample exhalation gas made up of a second gaseous mixture, a gas analyzer configured to measure gas concentrations, a switching valve that controls flow of the sampled inhalation gas and the sampled exhalation gas to the gas analyzer so as to alternately measure concentration of gaseous components within the first and second gaseous mixtures, a humidity control system that maintains humidity within the first and second gaseous mixtures to a predetermined humidity level, and a calculation section configured to calculate concentration differences of the gaseous components between the first and second gaseous mixtures.

Abstract: A dehumidifier is connected to a respiratory gas measuring apparatus. A membrane dryer has a first flow path through which a respiratory gas of a subject passes, and a second flow path through which a purge gas passes. A first normally-closed electromagnetic valve is disposed in a first upstream flow path that communicates with the first flow path. A second normally-closed electromagnetic valve is disposed in a first downstream flow path that communicates with the first flow path. A third normally-closed electromagnetic valve is disposed in a second upstream flow path that communicates with the second flow path. A fourth normally-closed electromagnetic valve is disposed in a second downstream flow path that communicates with the second flow path.

Abstract: A support tool which is to be attached to a finger of a subject, and which is used for supporting acquisition of physiological parameter of the subject, includes a support member that is to be placed on a first side of the finger, a bag member that is to be placed on a second side of the finger that is opposite to the first side, a fluid passage that communicates with an interior of the bag member, and a band portion that constraining the bag member to the finger. In the support tool, a sensor used for acquiring the physiological parameter is placeable at least one of between the finger and the support member, and between the finger and the bag member.

Abstract: A biological signal measuring system includes a sensor and a biological signal measuring apparatus configured to calculate a blood refill time of a living tissue of a subject. The sensor includes a pressure applying portion configured to apply pressure on the living tissue, a light emitter configured to emit light toward the living tissue, a light receiver configured to receive reflected light or transmitted light from the living tissue, a first light transmitting member made of a light transmitting material and having one side contacting the light emitter and the other side arranged to contact the subject, a second light transmitting member made of a light transmitting material and having one side contacting the light receiver and the other side arranged to contact the subject, and a light blocking member configured to block light between the light emitter and the light receiver.

Abstract: A method of producing a temperature sensor which is configured to detect a temperature change of a respiratory gas of a subject, includes: preparing a rod-like heat sensitive element which includes a heat sensitive portion in a tip end portion; placing the heat sensitive portion in a cavity of a mold; injecting a resin material into the cavity to mold a protective portion which covers the heat sensitive element; and releasing the tip end portion in which the protective portion is formed, from the mold.

Abstract: Provided is a biological information measurement device, including: a blood index calculation unit which calculates at least part of a blood index associated with oxygen transport based on transmitted light or reflected light when a body part of a test subject is irradiated with light with a plurality of wavelengths; an oxygen consumption calculation unit which calculates an oxygen consumption based on a gas concentration in inspired air, a gas concentration in expired air, and a ventilation amount of the test subject; a cardiac output calculation unit which calculates a cardiac output based on a biological signal obtained by a noninvasive method from the test subject; and an SvO2 estimation unit which estimates the mixed venous oxygen saturation of the test subject by substituting the blood index, the oxygen consumption, and the cardiac output in a calculation formula.

Abstract: A biological signal measuring system includes a sensor and a biological signal measuring apparatus configured to calculate a blood refill time of a living tissue of a subject. The sensor includes a pressure applying portion configured to apply pressure on the living tissue, a light emitter configured to emit light toward the living tissue, a light receiver configured to receive reflected light or transmitted light from the living tissue, a first light transmitting member made of a light transmitting material and having one side contacting the light emitter and the other side arranged to contact the subject, a second light transmitting member made of a light transmitting material and having one side contacting the light receiver and the other side arranged to contact the subject, and a light blocking member configured to block light between the light emitter and the light receiver.

Abstract: A method of producing a temperature sensor which is configured to detect a temperature change of a respiratory gas of a subject, includes: preparing a rod-like heat sensitive element which includes a heat sensitive portion in a tip end portion; placing the heat sensitive portion in a cavity of a mold; injecting a resin material into the cavity to mold a protective portion which covers the heat sensitive element; and releasing the tip end portion in which the protective portion is formed, from the mold.

Abstract: An airway adaptor includes: a gas passage into which a respiratory gas of a subject is to flow; a respiratory gas introducing portion which is configured to guide the respiratory gas expired from at least one of nostrils and a mouth of the subject, to the gas passage; and an airway case on which a temperature sensor that is configured to detect a temperature change of the respiratory gas flowing into the gas passage is mountable.