Evaluation of applanation resonator sensors for intra-ocular pressure measurement: results from clinical and in vitro studies.

↓ Direkt till sidans innehåll
↓ Direkt till sidans sekundära innehåll (sidomenyn)

Search: onr:"swepub:oai:DiVA.org:umu-19134" > Evaluation of appla...

1 of 1
Previous record
Next record
To hitlist

Details
MARC

Eklund, AndersUmeå universitet,Radiofysik,Umeå University Hospital, Department of Biomedical Engineering & Informatics (author)

Evaluation of applanation resonator sensors for intra-ocular pressure measurement : results from clinical and in vitro studies.

Article/chapterEnglish2003

Publisher, publication year, extent ...

2003
printrdacarrier

Numbers

LIBRIS-ID:oai:DiVA.org:umu-19134
https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-19134URI
https://urn.kb.se/resolve?urn=urn:nbn:se:ltu:diva-6797URI
https://doi.org/10.1007/BF02344887DOI

Supplementary language notes

Language:English
Summary in:English

Part of subdatabase

SwePubSwePub

Classification

Subject category:ref swepub-contenttype
Subject category:art swepub-publicationtype

Notes

Upprättat; 2003; 20070530 (andbra)
Glaucoma is an eye disease that, in its most common form, is characterised by high intra-ocular pressure (IOP), reduced visual field and optic nerve damage. For diagnostic purposes and for follow-up after treatment, it is important to have simple and reliable methods for measuring IOP. Recently, an applanation resonator sensor (ARS) for measuring IOP was introduced and evaluated using an in vitro pig-eye model. In the present study, the first clinical evaluation of the same probe has been carried out, with experiments in vivo on human eyes. There was a low but significant correlation between IOP(ARS) and the IOP measured with a Goldmann applanation tonometer (r = 0.40, p = 0.001, n = 72). However, off-centre positioning of the sensor against the cornea caused a non-negligible source of error. The sensor probe was redesigned to have a spherical, instead of flat, contact surface against the eye and was evaluated in the in vitro model. The new probe showed reduced sensitivity to off-centre positioning, with a decrease in relative deviation from 89% to 11% (1 mm radius). For normalised data, linear regression between IOP(ARS) and direct IOP measurement in the vitreous chamber showed a correlation of r = 0.97 (p < 0.001, n = 108) and a standard deviation for the residuals of SD < or = 2.18 mm Hg (n = 108). It was concluded that a spherical contact surface should be preferred and that further development towards a clinical instrument should focus on probe design and signal analysis.

Subject headings and genre

TEKNIK OCH TEKNOLOGIER Medicinteknik Medicinsk laboratorie- och mätteknik hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering Medical Laboratory and Measurements Technologies hsv//eng
MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Oftalmologi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Ophthalmology hsv//eng
TEKNIK OCH TEKNOLOGIER Medicinteknik Annan medicinteknik hsv//swe
ENGINEERING AND TECHNOLOGY Medical Engineering Other Medical Engineering hsv//eng
resonance sensor
intra-ocular pressure
Medical engineering
Medicinsk teknik
Ophtalmiatrics
Oftalmiatrik
Ophtalmology
oftalmiatrik
Medical Engineering for Healthcare

Added entries (persons, corporate bodies, meetings, titles ...)

Lindén, ChristinaUmeå universitet,Institutionen för klinisk vetenskap,Umeå University, Department of Clinical Science, Ophthalmology(Swepub:umu)chli0002 (author)
Bäcklund, TomasUmeå universitet,Radiofysik,Umeå University Hospital, Department of Biomedical Engineering & Informatics(Swepub:umu)bato0003 (author)
Andersson, Britt M,1962-Umeå universitet,Institutionen för tillämpad fysik och elektronik,Centrum för medicinsk teknik och fysik (CMTF),Umeå University. Department of Applied Physics and Electronics(Swepub:umu)bran0001 (author)
Lindahl, Olof A,1955-Umeå universitet,Institutionen för tillämpad fysik och elektronik,Centrum för medicinsk teknik och fysik (CMTF)(Swepub:ltu)olofl (author)
Umeå universitetRadiofysik (creator_code:org_t)

Related titles

In:Medical and Biological Engineering and Computing41:2, s. 190-1970140-01181741-0444

Internet link

Find in a library

Medical and Biological Engineering and Computing (Search for host publication in LIBRIS)

To the university's database

1 of 1
Previous record
Next record
To hitlist

Find more in SwePub

By the author/editor: Eklund, Anders; Lindén, Christin ...; Bäcklund, Tomas; Andersson, Britt ...; Lindahl, Olof A, ...

About the subject

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Medical Laborato ...

MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Ophthalmology

ENGINEERING AND TECHNOLOGY: ENGINEERING AND ...; and Medical Engineer ...; and Other Medical En ...

Articles in the publication: Medical and Biol ...

By the university: Umeå University; Luleå University of Technology

Search outside SwePub

Extend your search to:: Google; Google Book Search; Google Scholar

Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.

LIBRIS.kb.se