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Applanation resonance tonometry for intraocular pressure in humans
Umeå University Hospital, Department of Biomedical Engineering & Informatics.
Umeå University, Department of Clinical Science, Ophthalmology.
Umeå University Hospital, Department of Biomedical Engineering & Informatics.
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2004 (English)In: Physiological Measurement, ISSN 0967-3334, E-ISSN 1361-6579, Vol. 25, no 4, p. 1053-65Article in journal (Refereed) Published
Abstract [en]

Glaucoma is a group of diseases associated with optic nerve damage and loss of visual field. The aetiology is not completely understood, but one of the major risk factors is elevated intraocular pressure (IOP). Reliable methods for measuring the IOP are therefore important. The aim of the study was to investigate the ability of the applanation resonance tonometry (ART) system, based on continuous force and area recording, to measure IOP in humans. Both the phase of initial indentation (IOPIndentation) and the phase when the sensor was removed (IOPRemoval) from the cornea were analysed. The Goldmann applanation tonometry (GAT) was used as reference method. The study included 24 healthy volunteers with normal IOP and 24 patients with elevated IOP. The correlation and standard deviation (SD) between IOPIndentation and IOPGAT was R = 0.92 (p < 0.001), SD = 3.6 mmHg, n = 104, and between IOPRemoval and IOPGAT R = 0.94 (p < 0.001), SD = 3.1 mmHg, n = 104. In conclusion, resonance sensor technology has made it possible to introduce a new multi-point method for measuring IOP, and the method is relevant for measuring IOP in humans. The study indicates that with further development towards elimination of position dependence, the ART has the potential to become a useful clinical instrument for IOP measurement.

Place, publisher, year, edition, pages
2004. Vol. 25, no 4, p. 1053-65
National Category
Other Medical Engineering
Research subject
Medical Engineering for Healthcare
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URN: urn:nbn:se:ltu:diva-11423DOI: 10.1088/0967-3334/25/4/021Local ID: a61b9110-0f5a-11dc-b9dd-000ea68e967bOAI: oai:DiVA.org:ltu-11423DiVA, id: diva2:984373
Note
Upprättat; 2004; 20070531 (andbra)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Lindahl, Olof

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