A pulse oximeter has an integrated mode in which it operates as a plug-in module for a multiparameter patient monitoring system (MPMS). The pulse oximeter also has a portable mode in which operates separately from the MPMS as a battery-powered handheld or standalone instrument. The pulse oximeter has a sensor port that receives a photo-plethysmographic signal as input to an internal processor. The pulse oximeter processes this sensor signal to derive oxygen saturation and pulse rate measurements. In the portable mode, this information is provided on its display, and stored in memory for trend capability. In the integrated mode, the pulse oximeter provides oxygen saturation and pulse rate measurements to the MPMS through a docking station to be displayed on a MPMS monitor. In the integrated mode, the portable pulse oximeter docks to the docking station, which in turn is inserted in one or more MPMS slots. The docking station can function as a simple electrical pass-through device between the docked portable pulse oximeter and the MPMS or it can provide a MPMS communications interface.
REFERENCE TO RELATED APPLICATION
This application is a continuation of U.S. patent application Ser. No. 09/641,542, entitled "Dual-Mode Pulse Oximeter," filed Aug. 18, 2000, now U.S. Pat. No. 6,770,028, which is a continuation-in-part of U.S. patent application Ser. No. 09/491,175 entitled "Universal/Upgrading Pulse Oximeter," filed Jan. 25, 2000, now abandoned, which claims a priority benefit under 35 U.S.C. .sctn. 119 (e) from U.S. Provisional Patent Application Nos. 60/161,565, filed Oct. 26, 1999, now abandoned, entitled "Improved Universal/Upgrading Pulse Oximeter," and 60/117,097, filed Jan. 25, 1999, now abandoned, entitled "Universal/Upgrading Pulse Oximeter." The present application incorporates the foregoing disclosures herein by reference.
