Stretchable electrode and method of making physiologic measurements

An electrode for making electrical contact with the skin, including four conductors arranged in parallel in a quadripolar array for making peripheral plethysmograph measurements, each of said conductors being an uninsulated metal conductor adapted to make electrical contact with the skin, each of said conductors having a longitudinal axis and being elastically stretchable along said axis, said conductors being attached to an elastic substrate and means affixed to said substrate for fastening said conductors about a limb of a subject with the conductors in an elastically stretched condition.

A stretchable electrode adapted for encircling a body portion of a subject and making substantially continuous circumferential electrical contact with the skin of the body portion, comprising an uninsulated metal conductor having a longitudinal axis, said conductor being elastically stretchable along said axis, wherein said metal conductor comprises a plurality of metal wires woven into a tube which is disposed about an elastic core.

An electrode for making physiologic measurements of the human body comprising a plurality of metal wires braided into a tubular conductor having a longitudinal axis, an elastic core disposed inside said tubular conductor along said longitudinal axis, and means for attaching the tubular conductor to a portion of the body in an elastically stretched condition with the conductor in substantially continuous electrical contact with the skin of the body portion.