Medical electrode and a method of manufacturing same
First Claim
1. A medical electrode comprising:
- a foamed plastic disc having first and second sides with an aperture extending therebetween and forming a contact medium chamber, said foamed plastic disc comprising a plurality of cells with walls, said walls of said cells surrounding and adjoining said chamber being compressed and at least partially fused;
a plastic foil cover covering said aperture and at least a part of said foamed plastic disc surrounding said aperture on one of said sides of said disc;
connector means adapted to be electrically connected to monitoring equipment;
a metal electrode disposed in said chamber and electrically connected to said connector means; and
a layer of pressure-sensitive adhesive applied to the other of said sides of said disc.
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Accused Products
Abstract
A medical electrode for contacting the skin comprises a foam plastic disc (10) which is formed with an aperture (11), and the part of the disc surrounding the aperture is covered by a cover foil (12) on one side thereof. A strip-shaped metal electrode (13) is placed below the foil in the aperture and is connected to the stripped end (14) of a plastic insulated lead (15), whose end portion is covered by the cover foil. The whole assembly is welded together to form a unit in that it is placed between two pressing plates which form a capacitor in a high-frequency circuit, and one of them is of the same size and shape as the cover foil and presses it a distance into the foam plastic disc, which is thus compressed in the area concerned and fixed in the compressed shape because the cell walls partly fuse. This increases the resistance of the foam plastics against diffusion of the components of the contact medium which in the use of the electrode is placed in the aperture (11), without any noticeable deterioration in the flexibility and pliability of the electrode.
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Citations
10 Claims
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1. A medical electrode comprising:
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a foamed plastic disc having first and second sides with an aperture extending therebetween and forming a contact medium chamber, said foamed plastic disc comprising a plurality of cells with walls, said walls of said cells surrounding and adjoining said chamber being compressed and at least partially fused; a plastic foil cover covering said aperture and at least a part of said foamed plastic disc surrounding said aperture on one of said sides of said disc; connector means adapted to be electrically connected to monitoring equipment; a metal electrode disposed in said chamber and electrically connected to said connector means; and a layer of pressure-sensitive adhesive applied to the other of said sides of said disc. - View Dependent Claims (2, 3, 4, 5)
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6. A method of manufacturing a medical electrode comprising the steps of:
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providing a foamed plastic disc having first and second sides with an aperture extending therebetween and defining a contact medium chamber; providing a plastic foil cover in contact with said disc for covering said aperture of said disc and at least a portion of one side of said disc surrounding said aperture; positioning said disc and said plastic foil cover in contact therewith between at least two pressing means, with one of said pressing means having substantially the same shape as said foil cover; compressing said foamed plastic adjacent and surrounding said aperture; heating said disc and said foil cover to fuse at least part of said foamed plastic surrounding said aperture; disposing a foil metal electrode between said foamed plastic disc and said plastic foil cover, said foil metal electrode extending into said chamber; and applying a layer of pressure-sensitive adhesive to the other of said sides of said disc. - View Dependent Claims (7, 8, 9, 10)
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Specification