id:"swepub:oai:DiVA.org:umu-19134"
Sökning: id:"swepub:oai:DiVA.org:umu-19134" > Evaluation of appla...
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Evaluation of applanation resonator sensors for intra-ocular pressure measurement : results from clinical and in vitro studies.
-
- Eklund, Anders (författare)
- Umeå universitet,Radiofysik,Umeå University Hospital, Department of Biomedical Engineering & Informatics
-
- Lindén, Christina (författare)
- Umeå universitet,Institutionen för klinisk vetenskap,Umeå University, Department of Clinical Science, Ophthalmology
-
- Bäcklund, Tomas (författare)
- Umeå universitet,Radiofysik,Umeå University Hospital, Department of Biomedical Engineering & Informatics
- visa fler...
- visa färre...
- (creator_code:org_t)
- 2003
- 2003
- Engelska.
- Ingår i: Medical and Biological Engineering and Computing. - 0140-0118 .- 1741-0444. ; 41:2, s. 190-197
- Tidskriftsartikel (refereegranskat)
Abstract
Ämnesord
Stäng
- 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.
Ämnesord
- 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)
Nyckelord
- resonance sensor
- intra-ocular pressure
- Medical engineering
- Medicinsk teknik
- Ophtalmiatrics
- Oftalmiatrik
- Ophtalmology
- oftalmiatrik
- Medical Engineering for Healthcare
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
Hitta via bibliotek
- Medical and Biological Engineering and Computing (Sök värdpublikationen i LIBRIS)
Till lärosätets databas
- 1 av 1
- Föregående post
- Nästa post
- Till träfflistan
Hitta mer i SwePub
- Av författaren/redakt...
- Eklund, Anders
- Lindén, Christin ...
- Bäcklund, Tomas
- Andersson, Britt ...
- Lindahl, Olof A, ...
- Om ämnet
-
- TEKNIK OCH TEKNOLOGIER
- TEKNIK OCH TEKNO ...
- och Medicinteknik
- och Medicinsk labora ...
-
- MEDICIN OCH HÄLSOVETENSKAP
- MEDICIN OCH HÄLS ...
- och Klinisk medicin
- och Oftalmologi
-
- TEKNIK OCH TEKNOLOGIER
- TEKNIK OCH TEKNO ...
- och Medicinteknik
- och Annan medicintek ...
- Artiklar i publikationen
- Medical and Biol ...
- Av lärosätet
- Umeå universitet
- Luleå tekniska universitet
Sök utanför SwePub
- Sök vidare i:
- 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.
- Copyright © LIBRIS - Nationella bibliotekssystem
- LIBRIS.kb.se
