Pulse oximetry sensor
First Claim
Patent Images
1. A noninvasive pulse oximetry sensor comprising:
- a sensor housing having an internal cavity, an optical assembly housed within the cavity, the optical assembly including an LED, a photodetector, and a substrate, the substrate having substantially no elasticity in a direction along its longitudinal axis and being shaped to prevent substantial longitudinal movement of the sensor housing relative to the substrate;
wherein the cavity includes a head chamber, a tail chamber, and an intermediate chamber connecting the head chamber to the tail chamber, the substrate has a head portion, a tail portion, and a link, all lying along the longitudinal axis, the link providing a connection between the head portion and the tail portion and being substantially narrower than the head portion and the tail portion, the LED being mounted to the tail portion and the photodetector being mounted to the head portion, and, with the optical assembly housed within the cavity, the head portion is positioned to lie within the head chamber, the tail portion is positioned to lie within the tail chamber, and the link is positioned to lie within the intermediate chamber;
wherein the head portion and the tail portion of the substrate are substantially wider than the intermediate chamber of the cavity; and
wherein the sensor housing is formed to further include a lug protruding into the tail chamber and the tail portion of the substrate is formed to further include a notch formed to receive the lug.
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Accused Products
Abstract
A physiologic condition sensor comprises a sensor body including an optical assembly housed in a sensor housing. The optical assembly is configured to include a head portion, a tail portion, and an intermediate portion connecting the head portion and tail portion. The head and tail portions are wider than the intermediate portion to prevent longitudinal deformation of the sensor housing around the optical assembly.
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Citations
32 Claims
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1. A noninvasive pulse oximetry sensor comprising:
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a sensor housing having an internal cavity, an optical assembly housed within the cavity, the optical assembly including an LED, a photodetector, and a substrate, the substrate having substantially no elasticity in a direction along its longitudinal axis and being shaped to prevent substantial longitudinal movement of the sensor housing relative to the substrate;
wherein the cavity includes a head chamber, a tail chamber, and an intermediate chamber connecting the head chamber to the tail chamber, the substrate has a head portion, a tail portion, and a link, all lying along the longitudinal axis, the link providing a connection between the head portion and the tail portion and being substantially narrower than the head portion and the tail portion, the LED being mounted to the tail portion and the photodetector being mounted to the head portion, and, with the optical assembly housed within the cavity, the head portion is positioned to lie within the head chamber, the tail portion is positioned to lie within the tail chamber, and the link is positioned to lie within the intermediate chamber;
wherein the head portion and the tail portion of the substrate are substantially wider than the intermediate chamber of the cavity; and
wherein the sensor housing is formed to further include a lug protruding into the tail chamber and the tail portion of the substrate is formed to further include a notch formed to receive the lug. - View Dependent Claims (2, 3, 4, 5)
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6. A noninvasive pulse oximetry sensor comprising:
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a sensor housing having an internal cavity, an optical assembly housed within the cavity, the optical assembly including an LED, a photodetector, and a substrate, the substrate having substantially no elasticity in a direction along its longitudinal axis and being shaped to prevent substantial longitudinal movement of the sensor housing relative to the substrate;
wherein the cavity includes a head chamber, a tail chamber, and an intermediate chamber connecting the head chamber to the tail chamber, the substrate has a head portion, a tail portion, and a link, all lying along the longitudinal axis, the link providing a connection between the head portion and the tail portion and being substantially narrower than the head portion and the tail portion, the LED being mounted to the tail portion and the photodetector being mounted to the head portion, and, with the optical assembly housed within the cavity, the head portion is positioned to lie within the head chamber, the tail portion is positioned to lie within he tail chamber, and the link is positioned to lie within the intermediate chamber;
wherein the head portion and the tail portion of the substrate are substantially wider than the intermediate chamber of the cavity; and
wherein the sensor housing includes a lug protruding into the head chamber and the head portion of the substrate is formed to flyer include a notch formed to receive the lug. - View Dependent Claims (7, 8, 9)
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10. A noninvasive pulse oximetry sensor:
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a sensor housing including an internal cavity having a head chamber, a tail chamber, and an intermediate chamber connecting the head chamber to the tail chamber, and an optical assembly housed within the cavity, the optical assembly including an LED, a photodetector, and a substrate having substantially the same the cavity and defining a longitudinal axis, the substrate having substantially no elasticity in a direction along its longitudinal axis, the substrate having a head portion, a tail portion and a link, all lying along the longitudinal axis, the link providing a connection between head portion and the tail portion and being substantially narrower than the head portion and the tail portion, the LED being mounted to the tail portion and the photodetector being mounted to the head portion, wherein, with the optical assembly housed within the cavity, the head portion is positioned to lie within the head chamber, the tail portion is positioned to lie within the tail chamber, the link is positioned to lie within the intermediate chamber, and the head portion and the tail portion are substantially wider than the intermediate chamber; and
wherein the head portion of the substrate includes an aperture and the housing is formed to further include a post protruding into the head chamber and through the aperture. - View Dependent Claims (11, 12, 13, 14)
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15. A noninvasive pulse oximetry sensor:
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a sensor housing including an internal cavity having a head chamber, a tail chamber, and an intermediate chamber connecting the head chamber to the tail chamber, and an optical assembly housed within the cavity, the optical assembly including an LED, a photodetector, and a substrate having substantially the same shape as the cavity and defining a longitudinal axis, the substrate having substantially no elasticity in a direction along its longitudinal axis, the substrate having a head portion, a tail portion, and a link, all lying along the longitudinal axis, the link providing a connection between the head portion and the tail portion and being substantially narrower than the head portion and the tail portion, the LED being mounted to the tail portion and the photodetector being mound to head portion, wherein, with the optical assembly housed within the cavity, the head portion is positioned to lie within the head chamber, the tail portion is positioned to lie within the tail chamber, the link is positioned to lie within the intermediate chamber, and the head portion and the tail portion are substantially wider than the intermediate chamber; and
wherein the tail portion of the substrate includes an aperture and the housing is formed to further include a post protruding into the tail chamber and through the aperture. - View Dependent Claims (16, 17)
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18. A noninvasive pulse oximetry sensor comprising:
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a base having an interior base surface and an exterior base surface, the interior base surface being formed to include a channel and a sealing lip substantially surrounding the channel, the channel having a head portion, a tail portion, and an intermediate portion;
an optical assembly having substantially the same shape as the channel and being nested within the channel, the optical assembly comprising a substrate having a head portion, a tail portion, and an intermediate portion, an LED coupled to the tail portion of the substrate, and a photodetector coupled to the head portion of the substrate, wherein the head portion of the substrate is nested within the head portion of the channel, the tail portion of the substrate is nested within the tail portion of the channel, and the intermediate portion of the substrate is nested within the intermediate portion of the channel, and a cover having an interior cover surface and an exterior cover surface, the interior cover surface being formed to include a plateau and a sealing ledge substantially surrounding the plateau, the plateau having a head portion, a tail portion, and an intermediate portion, wherein the sealing ledge is coupled to the sealing lip of the base, thereby nesting the head portion of the plateau within the head portion of the channel, the tail portion of the plateau within the tail portion of the channel, and the intermediate portion of the plateau within the intermediate portion of the channel and sandwiching the optical assembly between the plateau and the channel. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25, 26)
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27. A method for manufacturing a noninvasive pulse oximetry sensor comprising the steps of:
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providing a base having an interior base surface and an exterior base surface, the interior base surface being formed to include a channel and a sealing lip substantially surrounding the channel, inserting an optical assembly into the channel, the optical assembly including an LED and a photodetector, providing a cover having an interior cover surface and an exterior cover surface, the interior cover surface being formed to include a plateau and a sealing ledge substantially surrounding the plateau, the cover further including a first window providing a first passageway between the interior cover surface and the exterior cover surface and a second window providing a second passageway between the interior cover surface and the exterior cover surface, coupling a first optically clear lens to the interior cover surface over the first window and a second optically clear lens to the interior cover surface over the second window, and coupling the sealing ledge of the cover to the sealing lip of the base, thereby coupling the cover to the base with the optical assembly sandwich there between and the LED aligned with the first window and the photodetector aligned with the second window. - View Dependent Claims (28, 29, 30, 31, 32)
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Specification