| 摘要 |
An electronic lung function analyser has an air flow tube (2) through which a patient inhales or exhales, an air flow transducer (3) associated with the air flow tube for providing an electrical output signal in response to inhaled or exhaled air flow in the tube, an electronic signal processor (11) connected to a display device (6) to provide from the transducer output signals an analogue or digital display representative of selected parameters of the patient's lung function, and a keyboard (9) for the manual input to the processor of data relating to the patient. The processor (11) is programmed to compute from the input data predicted normal patient (PNP) values appropriate to the said lung function parameters for display selectively on the display device. |
