Shielded, self-preparing electrode suitable for electroencephalographic mapping
First Claim
1. A shielded, self-preparing electrode, connectable to a coaxial cable having inner and outer conductors, for sensing an electrical potential of a blood-rich skin layer covered by a dead skin layer, said electrode comprising:
- potential sensing means, connectable to the inner conductor of the coaxial cable, for penetrating the dead skin layer, sensing the electrical potential of the blood-rich skin layer, absorbing a part of a penetrating force exceeding a force required to penetrate the dead layer of skin and helping prevent penetration of the blood-rich skin layer; and
shell means, connectable to the outer conductor of said coaxial cable, for securely holding and providing electromagnetic shielding for said potential sensing means and absorbing a remainder of the penetrating force exceeding the force required to penetrate the dead layer of skin.
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Accused Products
Abstract
A self-preparing electrode, suitable for EEG mapping, includes a metallic cylinder separated by a dielectric cylinder from a socket for a probe assembly. The probe assembly is preferably a tulip probe removably held by the socket which is connectable to an inner conductor of a coaxial cable. The metallic cylinder includes a cavity into which the tip of the tulip probe is partially depressed when the probe assembly and shell are placed on the skin of a patient. The tip of the tulip probe has multiple points which penetrate the dead skin layer and make electrical contact with the blood-rich skin layer of the patient. The electrode is held in place by straps attached to the shell of the electrode.
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Citations
17 Claims
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1. A shielded, self-preparing electrode, connectable to a coaxial cable having inner and outer conductors, for sensing an electrical potential of a blood-rich skin layer covered by a dead skin layer, said electrode comprising:
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potential sensing means, connectable to the inner conductor of the coaxial cable, for penetrating the dead skin layer, sensing the electrical potential of the blood-rich skin layer, absorbing a part of a penetrating force exceeding a force required to penetrate the dead layer of skin and helping prevent penetration of the blood-rich skin layer; and shell means, connectable to the outer conductor of said coaxial cable, for securely holding and providing electromagnetic shielding for said potential sensing means and absorbing a remainder of the penetrating force exceeding the force required to penetrate the dead layer of skin. - View Dependent Claims (2)
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3. A shielded, self-preparing electrode, connectable to a coaxial cable having inner and outer conductors, for sensing an electrical potential of a blood-rich skin layer covered by a dead skin layer, said electrode comprising:
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potential sensing means, connectable to the inner conductor of the coaxial cable, for penetrating the dead skin layer and sensing the electrical potential of the blood-rich skin layer, said potential sensing means comprising; dead skin piercing means for piercing the dead skin layer to make electrical contact with the blood-rich skin layer; and socket means, having first and second ends, connectable to the inner conductor of the coaxial cable at the first end, for removably holding said dead skin piercing means at the second end, and shell means, connectable to the outer conductor of said coaxial cable, for securely holding and providing electromagnetic shielding for said potential sensing means. - View Dependent Claims (4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A shielded, self-preparing electrode, connectable to a coaxial cable having inner and outer conductors, for sensing an electrical potential of a blood-rich skin layer covered by a dead skin layer, said electrode comprising:
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a probe assembly, comprising; a piston having a multiple-point tip for piercing the dead skin layer to make electrical contact with the blood-rich skin layer; a spring, abutting said piston, for forcing the multiple-point tip toward the blood-rich skin layer to maintain electrical contact with the blood-rich skin layer without causing bleeding; and a body holding said piston and said spring; a socket, having a first end connectable to the inner conductor of the coaxial cable and a second end removably holding said probe assembly; a shell, having a cavity and an insulator, connectable to the outer conductor of said coaxial cable, securely holding said socket in contact with the insulator and providing electromagnetic shielding for said probe assembly, the multiple-point tip of said piston being resistantly slidable into the cavity of said shell; and body attachment means for holding said shell and the multiple-point tip of said piston in contact with the dead skin layer. - View Dependent Claims (16, 17)
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Specification