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US 8,558,178 B2Granted
Physiological sensor having reduced sensitivity to interference
AssigneeCovidien LP
InventorsOleg Gonopolskiy, Arik Anderson
Life of this patent
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Abstract
A physiological sensor having reduced sensitivity to interference includes a light source, a light detector in optical communication with the light source, and a sensor pad at least partially housing the light source and the light detector. The sensor pad is configured to be capacitively isolated from a patient. Moreover, the physiological sensor may be electrically connected to an amplifier having a signal ground and a monitor.
Claims19
A sensor comprising:
- a sensor pad;
- a conductive material disposed on the sensor pad;
- a printed circuit board disposed on the conductive material, the printed circuit board including a light source configured to generate light and a light detector configured to receive light generated by the light source,
- wherein the sensor pad has a thickness that capacitively isolates the conductive material from a patient.
1 more element
A system comprising:
- an amplifier configured to receive signals representing physiological information, wherein the amplifier includes a monitor configured to graphically display the physiological information represented by the received signals;
- and
- a sensor having a sensor pad, a conductive material disposed on the sensor pad, and a printed circuit board disposed on the conductive material, the printed circuit board including a light source configured to generate light and a light detector configured to receive light generated by the light source, wherein the sensor pad has a thickness that capacitively isolates the conductive material from a patient.
A sensor comprising:
- a sensor pad;
- a conductive material disposed on the sensor pad;
- a printed circuit board disposed on the conductive material, the printed circuit board including a light source configured to generate light and a light detector configured to receive light generated by the light source,
- wherein the sensor pad has a thickness that capacitively isolates the conductive material from a patient and wherein a distance between the conductive material and the patient is based on the thickness of the sensor pad, and
- wherein a capacitance of the conductive material relative to the patient is defined as:
- Cp=∈0∈r, A/d, wherein Cp is the capacitance in Farads, A is an area of the sensor pad disposed on the patient, d is a distance between the conductive material and the patient, ∈r is a dielectric constant between the conductive material and the patient, and ∈0 is a permittivity of free space.
3 more elements
Dependencies are inferred from the claim text.