Low noise cable providing communication between electronic sensor components and patient monitor
First Claim
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1. A low noise patient cable comprising:
- a plurality of detector wires configured to communicate a physiological signal between a detector, which is responsive to energy received from an emitter, and a monitor;
a shield disposed over the plurality of detector wires; and
a plurality of emitter wires configured to communicate a drive signal between the monitor and at least one emitter, wherein the plurality of emitter wires are twisted in an opposing rotational direction relative to the plurality of detector wires about the shield, wherein an angle between the plurality of emitter wires and the plurality of detector wires is between about 60 degrees and about 90 degrees.
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Abstract
A physiological measurement system can include a low noise patient cable that connects a monitor and a noninvasive optical sensor. The cable has a plurality of emitter wires configured to communicate a drive signal between the monitor and at least one emitter. The cable also has a plurality of detector wires configured to communicate a physiological signal between at least one detector responsive to the emitter and the monitor. The emitter and detector wires are orthogonally disposed so that crosstalk between the two functionally different wires is mitigated.
1022 Citations
26 Claims
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1. A low noise patient cable comprising:
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a plurality of detector wires configured to communicate a physiological signal between a detector, which is responsive to energy received from an emitter, and a monitor; a shield disposed over the plurality of detector wires; and a plurality of emitter wires configured to communicate a drive signal between the monitor and at least one emitter, wherein the plurality of emitter wires are twisted in an opposing rotational direction relative to the plurality of detector wires about the shield, wherein an angle between the plurality of emitter wires and the plurality of detector wires is between about 60 degrees and about 90 degrees. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of making a cable, the method comprising:
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twisting in a first direction a plurality of inner core wires; disposing a shield over the plurality of inner core wires; twisting in a second direction a plurality of outer core wires around the shield, the second direction being opposite the first direction; and disposing a jacket around the plurality of outer core wires, wherein an angle between the plurality of inner core wires and the plurality of outer core wires is between about 60 degrees and about 90 degrees. - View Dependent Claims (9, 10, 11, 12, 13, 14, 15)
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16. A low noise patient cable comprising:
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a plurality of inner core wires twisted about a central axis of the cable in a first direction, the plurality of inner core wires being configured to communicate a first electrical signal; a shield disposed over the plurality of inner core wires; a plurality of outer core wires twisted about the central axis in a second direction, the second direction being opposite the first direction, wherein the plurality of outer core wires are configured to communicate a second electrical signal, wherein an angle between the second direction and the first direction is between about 60 degrees and about 90 degrees. - View Dependent Claims (17, 18, 19, 20, 21)
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22. A resilient patient cable comprising:
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a plurality of detector wires configured to communicate a physiological signal between a detector and a monitor; and a plurality of emitter wires separated by a shield from a plurality of the detector wires, said plurality emitter wires configured to communicate a drive signal between the monitor and at least one emitter, wherein the plurality of emitter wires are twisted in an opposing rotational direction relative to the plurality of detector wires, wherein the cable does not electrically fail after being kinked more than 1,000 times, and wherein an angle between the plurality of emitter wires and the plurality of detector wires is about 60 degrees to about 90 degrees. - View Dependent Claims (23, 24, 25, 26)
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Specification