Patent ID: 8880192

Claim:
Apparatus comprising an electrode assembly, which comprises: one or more electrodes; and a cuff, which comprises an electrically insulating material, and which is shaped so as to define: a tubular housing that defines a longitudinal axis therealong, the housing shaped so as to define two edges and a slit between the two edges, which slit and edges extend along an entire length of the cuff, wherein the housing is configured to assume (a) an open position, in which the two edges do not touch each other, and (b) a closed position, in which (i) respective contact surfaces of the two edges touch each other, and (ii) the housing defines an inner surface that faces and surrounds the axis, to which inner surface the electrodes are fixed, and three or more annular insulating elements that extend toward the axis from the inner surface of the housing at respective longitudinal positions along the housing, such that, when the housing is in the closed position, the inner surface of the housing and pairs of the insulating elements are shaped so as to define, at respective longitudinal positions along the housing, respective chambers open toward the axis, wherein the housing is shaped such that the contact surfaces of the two edges extend toward the axis and protrude into the chambers.