Method of manufacturing a tear flow measurement device

Number of patents in Portfolio can not be more than 2000

United States of America

PATENT NO 12239374
APP PUB NO 20230337906A1
SERIAL NO

18344118

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Importance

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Abstract

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A lacrimal tear flow measurement device, and methods of manufacture and use, are described that includes a polymer microcapillary tube or similar structure having at least one end coated on the outside with soft silicone rubber and one end treated on the inside to be hydrophobic. The hydrophobic end keeps liquid from escaping or entering that end while allowing air to pass. The rest of the tube's insides may be hydrophilic or a neutral hydrophobe. As a Schirmer's test strip replacement, the entrance end of the device can be touched to the lacrimal lake of a patient's eye to collect suck up, or merely collect, tear fluid within the collection tube for weighing, volume measurement, or other analysis. Long-term collection devices for wear between doctors' visits can have a bypass channel allowing liquid to flow back onto the eye.

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Patent Owner(s)

  • CALIFORNIA INSTITUTE OF TECHNOLOGY; UNIVERSITY OF SOUTHERN CALIFORNIA

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Humayun, Mark S Glendale, US 157 4400
Scianmarello, Nicholas E Pasadena, US 12 34
Tai, Yu-Chong Pasadena, US 251 6248

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