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Intraocular Pressure Measurement with a Rebound Tonometer (TonoVet®) in Normal Pigeons

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Authors
임재국
Advisor
서강문
Major
수의과대학 수의학과
Issue Date
2017-08
Publisher
서울대학교 대학원
Keywords
intraocular pressurerebound tonometrypigeonsColumbiformesreference valueslinear regression analysis
Description
학위논문 (석사)-- 서울대학교 대학원 수의과대학 수의학과, 2017. 8. 서강문.
Abstract
The purpose of this study was to evaluate the applicability of a rebound tonometer (TonoVet®) in pigeon eyes and to establish normal reference intraocular pressure (IOP) values in healthy pigeons. Twenty eyes of euthanized pigeons were used for the calibration of TonoVet® and 48 eyes of 24 adult pigeons for the reference IOP. First, IOP of pigeon eyes ex vivo were measured using the d and the p modes of the TonoVet® and compared with manometric IOP values from 5
to 80 mmHg. Then, to establish normal reference values, IOP was measured from clinically normal pigeons in vivo. Both the d and the p modes of the TonoVet® showed a strong linear correlation with the manometric IOP (R2 = 0.996 and 0.991, respectively). The obtained regression formulas were y = 0.431x1 + 2.154 and y = 0.330x2 - 0.673, respectively (x1, d mode of TonoVet®
x2, p mode of TonoVet®
y, manometric IOP). The d and the p modes steadily underestimated the actual IOP by approximately 1/2 and 1/3, respectively. Therefore, the formula obtained through the d mode was applied to obtain reference values. The calibrated IOP of normal pigeon eyes was 19.5 ± 4.4 mmHg. The actual IOP could be calculated using the presented formula. Considering the limitations of the p mode, it would be more appropriate to use the d mode. Therefore, the TonoVet® rebound tonometry under d mode is a reliable method for measuring IOP in pigeons.
Language
English
URI
https://hdl.handle.net/10371/137921
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College of Veterinary Medicine (수의과대학)Dept. of Veterinary Medicine (수의학과)Theses (Master's Degree_수의학과)
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