US 12,257,079 B2
Intraocular pressure sensor
Dongni Ren, Suzhou (CN); Fule Wang, Shanghai (CN); Kemin Wang, Shanghai (CN); Ruixue Yin, Shanghai (CN); Heming Wei, Shanghai (CN); and Hongbo Zhang, Shanghai (CN)
Assigned to MINGCHE BIOTECHNOLOGY CO., LTD, Suzhou (CN)
Filed by MINGCHE BIOTECHNOLOGY CO., LTD, Suzhou (CN)
Filed on Oct. 21, 2022, as Appl. No. 17/971,060.
Claims priority of application No. 202210432869.8 (CN), filed on Apr. 24, 2022.
Prior Publication US 2023/0337983 A1, Oct. 26, 2023
Int. Cl. A61B 5/00 (2006.01); A61B 3/16 (2006.01)
CPC A61B 5/6847 (2013.01) [A61B 3/16 (2013.01); A61B 2562/168 (2013.01)] 12 Claims
OG exemplary drawing
 
1. An intraocular pressure (IOP) sensor, comprising:
a transmission film component configured to be in direct contact with intraocular aqueous humor and sense pressure fluctuations of the intraocular aqueous humor;
a reflective film component set on an inner side of the transmission film component
a resonance chamber, which is an enclosed space formed by the reflective film component and the transmission film component, the resonance chamber being filled with filling medium;
an adhesion layer component set on an inner layer of the reflective film component and configured to connect to an attachment device;
wherein when a pressure in the intraocular aqueous humor is changed, the transmission film component is deformed, resulting in a change in a near-infrared (NIR) spectrum reflected by the reflective film component;
when the IOP sensor is irradiated with in vitro NIR light, the IOP is detected by an external receiver that receives the NIR spectrum reflected by the reflective film component and analyzes an IOP value according to the change of the NIR spectrum; and
wherein: an external profile of the IOP sensor, the transmission film component, the reflective film component, and the adhesion layer component are all of cylindrical annular structure, the transmission film component is sleeved on and wrapped around the cylindrical annular structure of the reflective film component, and the resonance chamber formed by the reflective film component and the transmission film component is annular;
a front segment of the IOP sensor is cylindrical, with a diameter of 250 μm to 500 μm, a wall thickness of 50 μm to 100 μm, and a length of 250 μm to 1000 μm;
a middle segment is polyhedral or cylindrical, with an envelope of polyhedral edge located in an external profile of the front segment and spaced 2 μm to 20 μm apart;
an end segment is of round table structure with a certain gradient, one end of the end segment is in contact with the middle segment, with a wall thickness of 50 μm to 100 μm, a height of 250 μm to 1000 μm, and a slope of 5° to 30°.