Intraocular pressure sensor
AssigneeBoard of Trustees of Michigan State University
InventorsWen Li, Arthur J. Weber, Mohammad Hossein Mazaheri Kouhani
Life of this patent
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Abstract
A pressure sensor system is provided. In another aspect, a wireless intraocular pressure sensor includes a deformable or stretchable inductor. A further aspect of an intraocular pressure sensing system includes a deformable inductor sized to contact an eye. Another aspect provides an organ pressure sensing system including a passive inductor with a wavy, serpentine or undulating shape.
Claims22
A method of making a pressure sensor, the method comprising:
- (a) depositing a polymeric bottom layer;
- (b) depositing a first metallic layer on the polymeric bottom layer;
- (c) depositing a middle polymeric layer on the first metallic layer;
- (d) depositing a second metallic layer on the intermediate polymeric layer such that the first and second metallic layers overlap with the middle polymeric layer therebetween;
- (e) depositing a polymeric upper layer on the upper metallic layer;
- (f) the polymeric layers encapsulating a majority of the metallic layers therein;
- (g) creating an undulating shape to at least one of the metallic layers which is an inductor, the undulating shaped inductor being stretchably expandable to operably change a readout signal of the pressure sensor;
- and
- (d) the metallic layers being configured to sense inductance and transmit a signal outside of the sensor, with the overlapping metallic layers being a capacitor.
A method of making a pressure sensor, the method comprising:
- (a) depositing a polymeric bottom layer;
- (b) depositing a first metallic layer on the polymeric bottom layer;
- (c) depositing a middle polymeric layer on the first metallic layer;
- (d) depositing a second metallic layer on the intermediate polymeric layer such that the first and second metallic layers overlap with the middle polymeric layer therebetween;
- (e) depositing a polymeric upper layer on the upper metallic layer;
- (f) creating an undulating shape to at least one of the metallic layers;
- (g) causing the pressure sensor to be configured to sense inductance due to intraocular pressure and transmit a wireless signal outside of the sensor;
- and
- (h) the at least one of the metallic layers with the undulating shape being configured to surround and be external to a cornea of an eye without in vivo implantation and without obstructing vision of the eye.
A method of making a pressure sensor, the method comprising:
- (a) depositing a polymeric bottom layer;
- (b) depositing a first metallic layer on the polymeric bottom layer;
- (c) depositing a middle polymeric layer on the first metallic layer;
- (d) depositing a second metallic layer on the intermediate polymeric layer such that the first and second metallic layers overlap with the middle polymeric layer therebetween;
- (e) depositing a polymeric upper layer on the upper metallic layer;
- (f) creating an undulating shape to at least one of the metallic layers;
- (g) creating a circular peripheral edge of the polymeric layers, and inwardly spacing peaks and valleys of the undulating shaped of the metallic layers away from the peripheral edge;
- (h) creating a multifunctional inductor and antenna from a single loop of the metallic layers, with the overlapping first and second metallic layers creating end segments of the single loop;
- and
- (i) causing the pressure sensor to be configured to sense inductance due to intraocular pressure and transmit a wireless signal outside of the sensor.
Dependencies are inferred from the claim text.