AN EXPANDABLE MULTI-PHYSIOLOGICAL PARAMETER MONITORING RING The present invention relates to the field of health medical device, and discloses an 5 expandable - physiological monitoring The multi - physiological parameter monitoring ring in embodiments of the present invention includes a microprocessor module and an internal sensor module connected to the microprocessor module, further an module detachably to microprocessor and used connect ing an sensor The 10 microproc essor module is configured to: when the external module interface is connected to the external sensor module, obtain measurement signals from the external sensor module and the internal sensor module, and process the measurement signals to obtain a differe nce between a measurement signal of the external sensor module and a measurement signal of the internal sensor module； and when the external module interface is not connected to the 15 external sensor module, calibrate, according to the difference, a physiolo gical parameter obtained by the internal sensor module. The present invention can improve accuracy of physiological parameter measurement at a fingertip, and can implement low load, portability , and comfort. 20 (FIG. 1) 25 30
