A comparison of postural and diurnal variations in intraocular pressure using the iCare rebound tonometer and Perkins applanation tonometer in admitted adults in Kenya

Autor:	Maxine N. Ondieki, Mercy Ndinyo, Isaac Miti, Kelechi C. Ogbuehi, Kingsley E Agho, Khathutshelo P. Mashige, Timothy G Chikasirimobi, Ndidi J. Ejiochi-Iyoke, Ferial M Zeried, Uchechukwu L. Osuagwu
Jazyk:	angličtina
Rok vydání:	2021
Předmět:	medicine.medical_specialty Intraocular pressure Evening Supine position genetic structures Glaucoma perkins 030501 epidemiology Sitting diurnal variation 03 medical and health sciences 0302 clinical medicine Ophthalmology medicine posture Morning business.industry Diurnal temperature variation RE1-994 medicine.disease eye diseases Perkins applanation tonometer icare 030221 ophthalmology & optometry 0305 other medical science business intraocular pressure
Zdroj:	African Vision and Eye Health, Vol 80, Iss 1, Pp e1-e6 (2021)
ISSN:	2410-1516 2413-3183
Popis:	Background: Elevated intraocular pressure (IOP) remained the most important known risk factor for glaucoma. Aim: To compare the postural and diurnal IOP variations using the iCare rebound tonometer (RT) and Perkins applanation tonometer (PAT). Setting: Kakamega County Hospital, Kenya. Methods: Elevated intraocular pressure measurements were taken by two (masked) examiners with two devices in the morning (06:00–09:00), midday (12:00–15:00) and evening (18:00–21:00), in the sitting followed by supine positions in one randomly selected eye of 24 oculo-visual healthy hospital-admitted patients. Effects of the time of the day and position of the body within and between devices were analysed with the Statistical Package for Social Sciences. Results: The mean IOP measured by the RT ranged from 6 mmHg to 24 millimetres of mercury (mmHg) in the sitting position and from 10 mmHg to 26 mmHg in the supine position. The mean IOP measured using PAT ranged from 6 mmHg to 21 mmHg in the sitting position and from 8 mmHg to 24 mmHg in the supine position. The IOP measured by both devices significantly varied with position ( p < 0.05). Perkins applanation tonometer on average gave a significantly higher IOP (1.7 mmHg [ p = 0.003] and 1.3 mmHg [ p = 0.034]) at 06:00 compared to that at 12:00 and 18:00, respectively. The IOP readings with the RT were on average 2.2 mmHg and 3.0 mmHg higher at 06:00 compared to that at 12:00 and 18:00, respectively ( p < 0.0005). Conclusion: Significant reductions were observed in postural and diurnal IOPs in the sitting positions and in the afternoon, respectively. Diurnal IOP variations were slightly higher when measured by RT compared to when measured by PAT.
Databáze:	OpenAIRE
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