1. Effect of body position on intraocular pressure in dogs without glaucoma.
- Author
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Broadwater, Joshua J., Schorling, Jamie J., Herring, Ian P., and Elvinger, François
- Subjects
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POSTURE , *LYING down position , *INTRAOCULAR pressure , *GLAUCOMA , *ANIMAL health , *DOGS - Abstract
Objective--To determine the effects of body position on intraocular pressure (IOP) in dogs without glaucoma. Animals--24 healthy dogs with no evidence of glaucoma. Procedures--Dogs underwent ophthalmic examinations to ensure that no IOP-affecting ocular diseases were present. Each dog was sequentially placed in dorsal recumbency, sternal recumbency, and sitting position. For each of the 3 positions, IOP in the right eye was measured by use of an applanation tonometer immediately after positioning (0 minutes) and after 3 and 5 minutes had elapsed. The initial body position was randomly assigned; each position followed the other positions an equal number of times, and IOP measurements were initiated immediately after moving from one body position to the next. Proparacaine hydrochloride (0.5%) was applied to the right eye immediately prior to IOP measurements. Results--Intraocular pressure was affected by body position. During the 5-minute examination, IOP decreased significantly in dogs that were dorsally recumbent or sitting but did not change significantly in dogs that were sternally recumbent. For the 3 positions, overall mean IOP differed significantly at each time point (0, 3, and 5 minutes). Mean IOP in dorsal recumbency was significantly higher than that in sternal recumbency at 0 and at 3 minutes; although the former was also higher than that in sitting position at 3 minutes, that difference was not significant. Conclusions and Clinical Relevance--Body position affects IOP in dogs. When IOP is measured in dogs, body position should be recorded and consistent among repeat evaluations. [ABSTRACT FROM AUTHOR]
- Published
- 2008
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