Fetal sensor with securing balloons remote from optics
First Claim
Patent Images
1. An oximeter sensor comprising:
- a sensor body;
a radiation emitter mounted in said sensor body;
a radiation detector mounted in said sensor body; and
a balloon coupled to said sensor body at a location where no part of said balloon is opposite at least one of said emitter and; and
wherein the radiation detector is used to detect radiation as a measure of oxygen saturation.
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Abstract
An oximeter sensor with an expandable element for positioning the sensor against the fetus. The expandable element is positioned to be removed from at least one of the emitter and detector so that the portion of the sensor adjacent the emitter or detector is not pressed unduly by the expandable element to exsanguinate the tissue. A constant pressure differential between a pressure of the expandable element and an amniotic pressure may be maintained.
130 Citations
17 Claims
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1. An oximeter sensor comprising:
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a sensor body; a radiation emitter mounted in said sensor body; a radiation detector mounted in said sensor body; and a balloon coupled to said sensor body at a location where no part of said balloon is opposite at least one of said emitter and; and wherein the radiation detector is used to detect radiation as a measure of oxygen saturation. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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13. An oximeter sensor comprising:
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a sensor body; a radiation emitter mounted in said sensor body; a radiation detector mounted in said sensor body; and an expandable element coupled to said sensor body at a location where no part of said expandable element is opposite at least one of said emitter and said detector, said expandable element having an unexpanded relaxed state and an expandable non-relaxed state in a direction normal to said sensor body; and wherein said expandable element has a maximum expansion point for contacting a uterine wall, said maximum expansion point being at least one quarter inch from one of said emitter and said detector in a direction along a face of said sensor body. - View Dependent Claims (12)
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14. An oximeter sensor comprising:
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a sensor body; a radiation emitter mounted in said sensor body; a radiation detector mounted in said sensor body; an expandable element coupled to said sensor body at a location where no part of said expandable element is opposite at least one of said emitter and said detector; and means adapted for communication with an amniotic fluid for maintaining a constant pressure differential between a pressure exerted by said expandable element and said; and wherein the radiation detector is used to detect radiation as a measure of oxygen saturation. - View Dependent Claims (15)
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16. An oximeter sensor comprising:
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a sensor body; a radiation emitter mounted in said sensor body; a radiation detector mounted in said sensor body; a balloon filled with a liquid coupled to said sensor body at a location removed from at least one of said emitter and said detector; and means for maintaining a constant pressure differential between a pressure exerted by said balloon and an amniotic fluid, wherein said means for maintaining comprises a first tube coupled to said balloon; a second tube adapted to be coupled to said amniotic fluid; and a pressure regulator coupled to said first and second tubes; and wherein the radiation detector is used to detect radiation as a measure of oxygen saturation.
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17. An oximeter sensor comprising:
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a sensor body; a radiation emitter mounted in said sensor body; a radiation detector mounted in said sensor body; a balloon filled with a liquid coupled to said sensor body; and means for maintaining a constant pressure differential between a pressure exerted by said balloon and an amniotic fluid, wherein said means to maintaining comprises a first tube coupled to said balloon; a second tube adapted to be coupled to said amniotic fluid; and a pressure regulator coupled to said first and second tubes; and wherein the radiation detector is used to detect radiation as a measure of oxygen saturation.
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Specification