Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Improved apparatus and method of intraocular pressure determination

A pressure, eyeball technology, used in tonometers, eye testing equipment, eye examinations, etc., to solve problems such as inability to measure or correct corneal thickness

Inactive Publication Date: 2007-10-31
EMOTION PACIFICA
View PDF2 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although portable tonometers are available, they cannot measure or correct for corneal thickness

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Improved apparatus and method of intraocular pressure determination
  • Improved apparatus and method of intraocular pressure determination
  • Improved apparatus and method of intraocular pressure determination

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A patient undergoing LASIK surgery for myopia of -8 diopters (-8D) had a preoperative central corneal thickness of 452 microns. Laser in situ keratomileusis procedure. The intraocular pressure measured six months after laser in situ keratomileusis was 16 mmHg as measured by Goldmann tonometry. The uncorrected intraocular pressure determined by the present invention was also 16 mmHg. A pachymeter showed a central corneal thickness of 347 microns. The corrected intraocular pressure determined by the present invention is 25 mmHg. In this case, the invention demonstrates that the intraocular pressure is higher than it would otherwise be; possibly masking glaucoma. Normal intraocular pressure ranges from 12 to 21 mmHg.

Embodiment 2

[0039] The patient's intraocular pressure, as measured by a Goldmann tonometer, was 19 mmHg for a routine eye examination. The uncorrected intraocular pressure as determined by the present invention was also 19 mmHg. Pachymetry showed a central corneal thickness of 485 microns. Corrected intraocular pressure as determined by the present invention was 23 mmHg. In this case, the invention demonstrates that the intraocular pressure is higher than it would otherwise be; glaucoma is masked.

[0040] The device of the present invention described and shown herein is a novel device for simultaneously measuring pressure and surface thickness of a fluid-filled eyeball at the same applanation site, where at least part of the applanation surface is an ultrasound transducer. The method using the device involves simultaneous measurement of intraocular pressure and surface thickness of a fluid-filled eyeball at the same applanation site for more accurate determination of intraocular pressu...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An improved apparatus and method of intraocular pressure determination is disclosed in which applanation tonometery is done simultaneously with pachymetry. The method allows for increased accuracy of intraocular pressure determination based upon adjustments of applanation tonometry for corneal thickness. The device allows an untrained operator to quickly and easily determine the accurate intraocular pressure.

Description

technical field [0001] The present invention is a new applanation tonometer for accurately measuring intraocular pressure so as to diagnose and monitor glaucoma and ocular hypertension. Specifically, applanation is accomplished jointly by an ultrasound transducer that measures corneal thickness at the applanation point and an intraocular pressure (IOP) measurement sensor. Because applanation pressure is a function of corneal thickness, measuring both variables at the same location allows for a more accurate determination of IOP. Applanation IOP measurement sensors and ultrasonic transducers allow minimally trained operators to determine the precise endpoint of applanation. Background technique [0002] Glaucoma refers to a specific type of optic nerve damage and loss of visual field caused by different eye diseases. Frequently, these diseases are characterized by elevated intraocular pressure, leading to a risk of developing glaucoma. Millions of people worldwide suffer f...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): A61B3/16A61B3/10
CPCA61B3/16A61B8/10A61B3/1005
Inventor 特里·A·福勒小法兰西斯·E·欧登聂耳王永平
Owner EMOTION PACIFICA
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com