Citius, Altius, Fortius: Agreement between Perkins and Dynamic Contour Tonometry (Pascal) and the Impact of Altitude
| Autor: | Nancy Arreguin-Rebollar, Marina Gil-Reyes, Shibal Bhartiya, Giovanna Casale-Vargas, Malik Y. Kahook, Oscar Albis-Donado |
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| Rok vydání: | 2017 |
| Předmět: |
medicine.medical_specialty
Intraocular pressure 030219 obstetrics & reproductive medicine Significant difference Glaucoma Pascal (unit) Repeatability Tonometry medicine.disease 03 medical and health sciences Ophthalmology 0302 clinical medicine Altitude Perkins applanation tonometry Bias Mexico city 030221 ophthalmology & optometry medicine Atmospheric pressure Mathematics Research Article |
| Zdroj: | Journal of Current Glaucoma Practice |
| ISSN: | 0974-0333 |
| Popis: | Introduction To ascertain differences in intraocular pressure (IOP) measurement and their repeatability between dynamic contour tonometry (DCT) and Goldmann/Perkins applanation tonometry (GAT) at two different atmospheric pressures. Materials and methods Forty-one eyes of 41 healthy consenting subjects were enrolled for this observational, cross-sectional study. Pachymetry and IOP measurements with DCT and GAT for both eyes of each subject at Acapulco (0 m from sea level) and at Mexico City (2,234 m from sea level) were done by the same observer. The IOP was compared between tonometers at each of the altitudes, and also for repeatability of each tonometer at different altitudes. Pearson’s correlation coefficient and Bland-Altman plots were used to assess reliability of measurements and their differences at the two altitudes. Results The mean age of patients was 41.7 (28-66 years); 22 were females. Mean IOP with DCT was 16.1 ± 2.2 mm Hg at sea level and 15.9 ± 2.1 mm Hg at 2,234 m above sea level, not a significant difference. Mean GAT IOP at the two altitudes was 13.1 ± 1.8 and 11.5 ± 1.7 mm Hg respectively, a statistically sig -nificant difference. In contrast, central corneal thickness (CCT) was not significantly changed (548.3 to 549.4 μm, p = 0.496). Conclusion Repeatability of single-observer measurements with GAT remains clinically acceptable, but not at different altitudes. The DCT seems to more consistently measure a similar IOP at different altitudes in the same subjects. The two tonometers may not be used interchangeably in the serial follow-up of patients at any of the altitudes. How to cite this article: Albis-Donado O, Bhartiya S, Gil-Reyes M, Casale-Vargas G, Arreguin-Rebollar N, Kahook MY. Citius, Altius, Fortius: Agreement between Perkins and Dynamic Contour Tonometry (Pascal) and the Impact of Altitude. J Curr Glaucoma Pract 2018;12(1):40-44. |
| Databáze: | OpenAIRE |
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