Device for the transcutaneous electrochemical determination of the partial oxygen pressure in blood
First Claim
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1. An electrochemical device for transcutaneous electrochemical measurement of the partial pressure of oxygen in the blood of humans or animals comprising:
- n measuring cells, n being equal to or greater than three, each measuring cell including electrodes, a surface for contacting the skin, and heating element means for heating the surface;
a plurality of measuring circuits, a separate measuring circuit being operatively connected to the electrodes of each cell; and
power supply means for periodic, sequential actuation of the heating element means, each of said heating element means being actuated for a first period of T1 minutes which is followed by a second period of T2 minutes during which the heating element means is not actuated, the heating element means being actuated in a sequence so that actuation of each heating element means commences at an instant (T1 +T2)/n minutes after the beginning of the actuation of the preceeding heating element means in the sequence.
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Abstract
A device for the transcutaneous electrochemical determination of the partial oxygen pressure in blood, comprising a measuring head which includes at least three measuring cells of the Clark-type, comprising periodically actuated heating elements, the actuation of the heating elements being realized at a phase difference such that always at least one measuring cell provides a reliable measuring value.
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Citations
2 Claims
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1. An electrochemical device for transcutaneous electrochemical measurement of the partial pressure of oxygen in the blood of humans or animals comprising:
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n measuring cells, n being equal to or greater than three, each measuring cell including electrodes, a surface for contacting the skin, and heating element means for heating the surface; a plurality of measuring circuits, a separate measuring circuit being operatively connected to the electrodes of each cell; and power supply means for periodic, sequential actuation of the heating element means, each of said heating element means being actuated for a first period of T1 minutes which is followed by a second period of T2 minutes during which the heating element means is not actuated, the heating element means being actuated in a sequence so that actuation of each heating element means commences at an instant (T1 +T2)/n minutes after the beginning of the actuation of the preceeding heating element means in the sequence. - View Dependent Claims (2)
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Specification