Electrochemical electrode with heating means

Claim 2

An electrode arrangement for application to a body surface for bloodless measurement in connection with the concentration or the partial pressure of a gas in the blood .[.including.]. .Iadd.comprising.Iaddend., sensor means for .Iadd.electrochemically .Iaddend.deriving.Iadd., .Iaddend.in vivo.Iadd., .Iaddend.electrical signals indicative of the .Iadd.concentration or .Iaddend.partial pressure of gas in .Iadd.the .Iaddend.blood .[.and having.]. .Iadd., said sensor means including .Iaddend.a face member .[.adapted.]. for body contact.[., the improvement comprising:.]..Iadd.; and .Iaddend.heating means in direct thermal contact with .[.said sensor means and adapted to transmit to said face member a thermal condition for thermal stimulation at the applied body surface of local blood circulation.]. .Iadd.the face member for transmitting heat throughout the face member into the body tissue directly therebeneath to produce a condition of sufficient hyperemia in said body tissue.Iaddend..

Claim 3

An electrode arrangement according to claim 1 whereby said heating means includes a current source and a resistance winding connected from said current source.

Claim 4

An electrode arrangement according to claim 2 whereby said heating means also includes: thermally conductive block means positioned in thermal contact with said sensor means and said winding being mounted on said block means.

Claim 5

An electrode arrangement according to claim 3 whereby said face member is of a material adapted for catalysing the electrochemical reaction at the body surface to which applied.

Claim 6

An electrode arrangement according to claim 4 whereby the face member of said sensor means is of platinum.

Claim 7

An electrode arrangement according to claim 3 whereby said sensor means further includes at said face member a cover membrane, permeable for the gas to be measured.

Claim 8

An electrode arrangement according to claim 1, whereby said heating means includes: temperature regulating means having a temperature-measuring element the measuring probe of which is mounted in the vicinity of said sensor means.

Claim 9

An electrode arrangement for application to a body surface for bloodless measurement in connection with the concentration or the partial pressure of a gas in the blood comprising: a substantially cylindrical electrically and heat conductive member provided with an encircling recess about its outer surface and a first axial boring on one end-face; smoothly cylindrical electrode means lying on the member end-face opposite said boring and electrically and heat-conductively coupled with said member; heating winding means mounted in said recess for generating a thermal condition for application to said body surface; temperature measuring means mounted in said axial boring; annular reference electrode means mounted concentrically with the electrode means; a contact face of said reference electrode lying in a common plane with the end-face of the electrode means distal to said member; an electrolyte film covering the contact face and the end-face of the electrode means; membrane means covering said electrolyte film, adapted for body contact; and lead means electrically coupled with said electrode means for deriving in vivo electrical signals indicative of the partial pressure of gas in blood.

Claim 10

An electrode arrangement for application to a body surface for bloodless measurement in connection with the concentration or the partial pressure of a gas in the blood comprising: a substantially cylindrical electrically and heat conductive member provided with an encircling recess about its outer surface and a first axial boring on one end-face; smoothly cylindrical electrode means lying on the member end-face opposite said boring and electrically and heat-conductively coupled with said member; heating winding means mounted in said recess for generating a thermal condition for application to said body surface; temperature measuring means mounted in said axial boring; annular reference electrode means mounted concentrically with the electrode means; a contact face of said reference electrode lying in a common plane with the end-face of the electrode means distal to said member; an electrolyte film covering the contact face and the end-face of the electrode means; membrane means covering said electrolyte film, adapted for body contact; and lead means electrically coupled with said electrode means for deriving in vivo electrical signals indicative of the partial pressure of gas in blood.