Abstract: A health risk assessment device includes a mouthpiece, a flow path in fluid communication with the mouthpiece, a sensor disposed in the flow path and configured to generate a representation of a spirometric parameter of air flow in the flow path exhaled by a user through the mouthpiece, a user interface configured to allow the user to provide user profile data including smoking history data, and a processor coupled to the sensor and the user interface and configured to determine an output indicative of a risk that the user develops a respiratory, cardiopulmonary, or cardiovascular disease based on the spirometric parameter representation and the smoking history data.

Abstract: A self-contained, portable system for measuring and computing respiratory parameters of a test subject undergoing forced expired breathing maneuvers according to instructions including a spirometer for receiving the exhaled breath of the subject for generating a measurement signal, a miniaturized digital computer for receiving the measurement signal, a visual display for presenting alpha-numeric characters under control of the computer to generate indicia representative of the computed parameter results, the computer further including a central processing unit and a voltage control oscillator interconnected between the central processing unit and the spirometer for receiving the measurement signal from the spirometer and converting the same to digital signals for averaging by the central processing unit to substantially eliminate random noise.

Abstract: A device and method for calibrating pulmonary function testing equipment by discharging a precise volume of compressed gas at reproducible and substantially exponentially diminishing flow rates through an orifice of a selected size into such equipment. The device includes a container defining a chamber for containing a predetermined volume of gas at a preselected pressure, a gas discharge conduit, which may serve as a conversion or expansion chamber, communicating with the container and having a flow-restricting fixed orifice of predetermined size for the discharge of gas, and a mechanism normally preventing the discharge of gas from the device but being selectively operable to release the gas through the orifice at reproducible and substantially exponentially diminishing flow rates into a spirometer for calibrating that instrument.

Abstract: A programmable digital computer receives an electrical signal from a spirometer into which a person under test breathes. The signal is representative of the volume of air expired by the person. The computer controls a matrix printer. Data may be entered into the computer via a keyboard. The computer instructs the operator as to when identification data may be entered via the keyboard. The operator indicates which test is to be conducted by actuating the keyboard; and the computer receives the data and indicates whether acquired test data is acceptable. The operator tells the test subject which breathing maneuver he must follow for a desired test. The computer stores the test results and the operator may then have the measurement test results analyzed by the computer, compared with standardized predicted values, and printed on a permanent record.