Abstract: A capnometer is disclosed with a light sourse for irradiating a respirtory gas, a thermal detector for sensing the transmission of the infrared radiation, a switch device for turning the radiation source on and off in a predetermined period, a memory device for storing output from the thermal deterctor, and a control device for picking up a maximum value of the detection signal from the thermal detector for the present inspiration phase. The maximum value is stored in the memory device and the difference is calculated between a subsequently issued detection signal and the stored maximum value to compensate for drift that has occurred in the thermal detector.

Abstract: A cardiac output and right ventricular ejection fraction computer comprises a catheter, having an indicator injection port which is located at the right ventricular, inserted into an intravascular of a patient and retained therein; thermal detector device, mounted on a distal portion of the catheter, for detecting the temperature of blood ejected from the right ventricle; signal processor device for calculating the right ventricular ejection fraction from a thermodilution curve obtained by detecting variation of the blood temperature measured by the thermal detector device when a indicator is injected into the right ventricular through the catheter; data input device for inputting data to the signal processor device.

Abstract: A needle type lens structure comprises, an inner tube having a relay lens inserted therein, an outer tube mounted around an outer periphery of the inner tube in concentric relation thereto with a predetermined gap, and light transmitting device, for guiding illumination light to the distal end of the needle type lens, provided axially between the inner tube and the outer tube.

Abstract: A CRT controller can be included in a device for driving a dot array recorder. Image processed data output by the CRT controller is stored in a buffer memory. This data stored in the buffer memory is shifted by one raster in response to a vertical sync signal from the CRT controller. The period of the vertical sync signal is set through a command input device to correspond to the paper feed speed and the printing line density. A data display timing signal is output by the CRT controller to a data holding circuit. The raster of data shifted out of the buffer memory is held by the holding circuit and printed on a recording surface by a recording head.