PHYSIOLOGICAL PARAMETER SENSORS
First Claim
1. An implantable galvanometric sensor for measuring blood gas concentration, the sensor comprising:
- a first gas permeable tube at least partially defining a first chamber containing a first electrolyte;
a second gas permeable tube at least partially in the first chamber and at least partially defining a second chamber containing a second electrolyte;
a first sensing electrode extending into the second chamber from a first direction, the first sensing electrode comprising a first insulated wire having an exposed end in contact with the second electrolyte and not in contact with the second gas permeable tube, the exposed end of the first insulated wire being a substantially radial cross-section of the first insulated wire, the first sensing electrode comprising a first metal;
a third tube at least partially in the second chamber, the third tube comprising sides and an end comprising a first frit, the sides of the third tube being gas impermeable, the sides and the end of the third tube at least partially defining a third chamber containing a third electrolyte; and
a first reference electrode in the third chamber and extending into the second chamber from the first direction, the first reference electrode substantially parallel to the first sensing electrode, the first reference electrode comprising a second metal, wherein a potential difference between the first metal and the second metal is at least about 0.5 volts.
2 Assignments
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Accused Products
Abstract
A blood gas concentration sensor includes a first housing at least partially defining a first chamber containing a first electrolyte, a first electrode in the first chamber, and a second electrode in the first chamber and substantially parallel to the first electrode. The first housing includes a gas permeable material. The first electrode includes sides and an end. The sides of the first electrode are surrounded by a first insulating layer. The end of the first electrode is in contact with the first electrolyte. The end of the first electrode is not in contact with the first housing. The first electrode includes a first metal. The second electrode includes a second metal. A potential difference between the first metal and the second metal is at least about 0.5 volts.
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Citations
20 Claims
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1. An implantable galvanometric sensor for measuring blood gas concentration, the sensor comprising:
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a first gas permeable tube at least partially defining a first chamber containing a first electrolyte; a second gas permeable tube at least partially in the first chamber and at least partially defining a second chamber containing a second electrolyte; a first sensing electrode extending into the second chamber from a first direction, the first sensing electrode comprising a first insulated wire having an exposed end in contact with the second electrolyte and not in contact with the second gas permeable tube, the exposed end of the first insulated wire being a substantially radial cross-section of the first insulated wire, the first sensing electrode comprising a first metal; a third tube at least partially in the second chamber, the third tube comprising sides and an end comprising a first frit, the sides of the third tube being gas impermeable, the sides and the end of the third tube at least partially defining a third chamber containing a third electrolyte; and a first reference electrode in the third chamber and extending into the second chamber from the first direction, the first reference electrode substantially parallel to the first sensing electrode, the first reference electrode comprising a second metal, wherein a potential difference between the first metal and the second metal is at least about 0.5 volts. - View Dependent Claims (2, 3, 4, 5)
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6. A blood gas concentration sensor comprising:
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a first housing at least partially defining a first chamber containing a first electrolyte, the first housing comprising a gas permeable material; a first electrode in the first chamber, the first electrode comprising sides and an end, the sides of the first electrode surrounded by a first insulating layer, the end of the first electrode in contact with the first electrolyte, the end of the first electrode not in contact with the first housing, the first electrode comprising a first metal; and a second electrode in the first chamber and substantially parallel to the first electrode, the second electrode comprising a second metal, wherein a potential difference between the first metal and the second metal is at least about 0.5 volts. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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20. A blood gas concentration sensor comprising:
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a first housing at least partially defining a first chamber containing a first electrolyte, the first housing comprising a gas permeable material; a first wire comprising an exposed end comprising a first metal in contact with the first electrolyte; and a second wire comprising a second metal, wherein a potential difference between the first metal and the second metal is at least about 0.5 volts.
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Specification