Systems and methods for sensing intraocular pressure
First Claim
1. A system for sensing biological pressure, comprising:
- an implantable device comprising a first membrane structure, a second membrane structure, and a plurality of nanophotonic components adapted to reflect light, wherein the first and second membrane structures are separated by a gap and the first membrane structure is movable with respect to the second membrane structure in response to a change in ambient pressure such that the implantable device has a resonance wavelength that shifts as a size of the gap changes; and
a reader unit adapted to transmit optical light to the implantable device and detect the resonance wavelength of the implantable device based on light reflected from the implantable device.
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Abstract
Systems and methods of sensing intraocular pressure are described. An example miniaturized intraocular pressure (IOP) monitoring system is provided using a nanophotonics-based implantable IOP sensor with remote optical readout that can be adapted for both patient and research use. A handheld detector optically excites the pressure-sensitive nanophotonic structure of the IOP-sensing implant placed in the anterior chamber and detects the reflected light, whose optical signature changes as a function of IOP. Optical detection eliminates the need for large, complex LC structures and simplifies sensor design. The use of nanophotonic components improves the sensor'"'"'s resolution and sensitivity, increases optical readout distance, and reduces its size by a factor of 10-30 over previous implants. Its small size and convenient optical readout allows frequent and accurate self-tracking of IOP by patients in home settings.
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Citations
25 Claims
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1. A system for sensing biological pressure, comprising:
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an implantable device comprising a first membrane structure, a second membrane structure, and a plurality of nanophotonic components adapted to reflect light, wherein the first and second membrane structures are separated by a gap and the first membrane structure is movable with respect to the second membrane structure in response to a change in ambient pressure such that the implantable device has a resonance wavelength that shifts as a size of the gap changes; and a reader unit adapted to transmit optical light to the implantable device and detect the resonance wavelength of the implantable device based on light reflected from the implantable device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. An apparatus for sensing biological pressure, comprising:
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an implantable device comprising a first membrane structure, a second membrane structure, and a plurality of nanophotonic components adapted to reflect light, wherein the first and second membrane structures are separated by a gap and the first membrane structure is movable with respect to the second membrane structure in response to a change in ambient pressure such that the implantable device has a resonance wavelength that shifts as a size of the gap changes, the resonance wavelength being detectable based on light reflected by the implantable device. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
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Specification