Physiological parameter monitoring with minimization of motion artifacts

An implantable medical system comprising:

• a first optical sensor configured to generate a first electrical signal;
• a second optical sensor configured to generate a second electrical signal;
• and
• a processor configured to receive the first electrical signal and the second electrical signal, detect an arterial pulse of the patient based on a first signal characteristic of the first electrical signal, detect a second signal characteristic of the second electrical signal indicative of the arterial pulse, and determine whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics.

A medical system comprising:

• means for receiving a first electrical signal from a first optical sensor implanted within a patient;
• means for receiving a second electrical signal from a second optical sensor implanted within the patient;
• means for detecting an arterial pulse of the patient based on at least one of the first or second electrical signals a first signal characteristic of the first electrical signal;
• means for detecting a second signal characteristic of the second electrical signal indicative of the arterial pulse;
• and
• means for determining whether the detected arterial pulse is a spurious pulse based on a time delay between the first and second signal characteristics.

A method comprising:

• receiving a first electrical signal from a first optical sensor implanted within a patient;
• receiving a second electrical signal from a second optical sensor implanted within the patient, wherein the first and second optical sensors are positioned relative to each other such that the first optical sensor detects an arterial pulse of the patient before the second optical sensor;
• detecting a first signal characteristic of the first signal;
• detecting a second signal characteristic of the second signal;
• determining whether the first and second signal characteristics occurred within a predetermined range of time;
• and
• if the first and second signal characteristics occurred within the predetermined range of time, determining that the first and second signal characteristics are artifacts.