Abstract: Disclosed is a portable spirometer which comprises: a small breath tube for measuring a unidirectional flow, to which the breath flow of a patient is inputted; a breath signal processing unit which generates a breath signal from the breath flow, removes the noise contained in the breath signal and amplifies the signal level so as to generate a target signal of analysis; a breath signal analysis unit for analyzing the target signal of analysis to calculate diagnosis parameters; and a display unit for displaying the analysis result of the breath signal.

Abstract: Disclosed is an automatic decompression valve for sphygmomanometer with an extension spring, which can decompress pressure at a constant without control of the decompression vale of the sphygmomanometer, and be used uprightly regardless of a peripheral circumstance. The automatic decompression valve includes: a valve body having an inlet through which air is introduced from a cuff therein, and an outlet through which the introduced air is exhausted; a piston having a piston shaft for moving toward the outlet in the valve body; a spring having one end connected to the piston; a three-way valve provided with a connector with which the valve body is assembled, and air inlet and outlet, the three-way valve being connected to the other end of the spring; and a support for supporting the three-way valve.

Abstract: Disclosed is an automatic decompression valve for sphygmomanometer with an extension spring, which can decompress pressure at a constant without control of the decompression vale of the sphygmomanometer, and be used uprightly regardless of a peripheral circumstance. The automatic decompression valve includes: a valve body having an inlet through which air is introduced from a cuff therein, and an outlet through which the introduced air is exhausted; a piston having a piston shaft for moving toward the outlet in the valve body; a spring having one end connected to the piston; a three-way valve provided with a connector with which the valve body is assembled, and air inlet and outlet, the three-way valve being connected to the other end of the spring; and a support for supporting the three-way valve.

Abstract: The present invention relates to a system (1) for obtaining measuring characteristic correction factors for a respiratory flow measuring device (50) using a differential pressure difference. The system (1) has a 3 L syringe (10), a detecting unit (20), an A/D converter (30) and a computer (40). The 3 L syringe (10) is connected to a respiratory tube of the respiratory flow measuring device (50) through a duct line. The detecting unit (20) detects volume variation within the syringe (10) and outputs the detected result as a voltage signal. The A/D converter (30) converts a volume variation signal, detected as the voltage signal by the detecting unit (20), and a differential pressure variation signal, detected as a voltage signal by a differential pressure sensor (54) through a signal extracting circuit (56) into digital signals. The computer (40) calculates measuring characteristic correction factors using the digital signals.

Abstract: Disclosed is an apparatus for measuring respiratory gas flow, which provides a high accuracy in measurement of the respiratory gas flow and reduces the manufacturing cost of the apparatus, in comparison with the conventional disposable apparatus for measuring respiratory gas. The apparatus includes a measurement module and a respiratory tube assembly. The respiratory tube assembly comprise a cylindrical tube body and a sensing rod inserted through the cylindrical tube body. The sensing rod is shaped like the number “1” and has a plurality of sampling pores and two air passages. Locations of the sampling pores are determined by equal area division method in which a circular section of the cylindrical tube body is divided into a plurality of annuluses with equal areas and the sampling pores are formed at the positions also equally dividing the annuluses to which the sampling pores belong.

Abstract: The present invention relates to a system (1) for obtaining measuring characteristic correction factors for a respiratory flow measuring device (50) using a differential pressure difference. The system (1) has a 3L syringe (10), a detecting unit (20), an A/D converter (30) and a computer (40). The 3L syringe (10) is connected to a respiratory tube of the respiratory flow measuring device (50) through a duct line. The detecting unit (20) detects volume variation within the syringe (10) and outputs the detected result as a voltage signal. The A/D converter (30) converts a volume variation signal, detected as the voltage signal by the detecting unit (20), and a differential pressure variation signal, detected as a voltage signal by a differential pressure sensor (54) through a signal extracting circuit (56) into digital signals. The computer (40) calculates measuring characteristic correction factors using the digital signals.

Abstract: Disclosed is an apparatus for measuring respiratory gas flow, which provides a high accuracy in measurement of the respiratory gas flow and reduces the manufacturing cost of the apparatus, in comparison with the conventional disposable apparatus for measuring respiratory gas. The apparatus includes a measurement module and a respiratory tube assembly. The respiratory tube assembly comprise a cylindrical tube body and a sensing rod inserted through the cylindrical tube body. The sensing rod is shaped like the number “1” and has a plurality of sampling pores and two air passages. Locations of the sampling pores are determined by equal area division method in which a circular section of the cylindrical tube body is divided into a plurality of annuluses with equal areas and the sampling pores are formed at the positions also equally dividing the annuluses to which the sampling pores belong.