Wireless patient monitoring device

A wireless patient monitoring system configured to be coupled to a patient, the system comprising:

• a wireless monitor including:
• a base;
• and
• a removable component including a memory, the removable component configured to removably engage with the base;
• a strap for securing the wireless monitor to the patient, wherein a portion of the strap is configured to engage with the base by passing through an opening on the base;
• an optical sensor configured to obtain photoplethysmographs, the optical sensor including at least one emitter configured to emit light and at least one detector configured to detect said light after attenuation by tissue of the patient, said photoplethysmographs responsive to said detected light, and
• wherein the base further includes one or more outlets for coupling to one or more sensors including the optical sensor, and
• wherein the wireless monitor includes a wireless transceiver configured to wirelessly transmit sensor data from the optical sensor.