Signal relay apparatus and patient monitoring system

A signal relay apparatus configured to communicate with a patient monitor configured to display first physiological information of a subject and second physiological information of the subject, the signal relay apparatus comprising:

• a sensor interface configured to receive a signal from a sensor attached to the subject;
• an analyzer configured to analyze the signal to acquire data corresponding to the first physiological information;
• a communication interface configured to transmit at least one of the signal and the data to the patient monitor;
• and
• a display configured to display the first physiological information while the first physiological information and the second physiological information are displayed on the patient monitor.

A patient monitoring system comprising:

• a patient monitor configured to display first physiological information of a subject and second physiological information of the subject;
• and
• a signal relay apparatus configured to communicate with the patient monitor,
• wherein the signal relay apparatus comprises:
• a sensor interface configured to receive a signal from a sensor attached to the subject;
• an analyzer configured to analyze the signal to acquire data corresponding to the first physiological information;
• a communication interface configured to transmit at least one of the signal and the data to the patient monitor;
• and
• a display configured to display the first physiological information while the first physiological information and the second physiological information are displayed on the patient monitor.