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Abstract #46469 Published in IGR 13-3
Effect of eyelid manipulation and manual jugular compression on intraocular pressure measurement in dogs
Klein HE; Krohne SG; Moore GE; Mohamed AS; Stiles JJournal of the American Veterinary Medicine Association 2011; 238: 1292-1295
Objective-To determine the effect of eyelid manipulation and manual jugular compression on intraocular pressure (IOP) measurement in clinically normal dogs. Design-Randomized clinical trial. Animals-30 dogs (57 eyes) without diseases or medications that affect IOP. Procedures-An applanation tonometer was used to measure IOP during eyelid manipulation or jugular compression. Six manipulations were used in each eye, including minimal eyelid manipulation, maximal dorsoventral extension of the eyelids, lateral eyelid extension, manual compression of the ipsilateral jugular vein, manual compression of both jugular veins, and lateral eyelid extension with manual compression of both jugular veins. Skull type and position of globe in the orbit were recorded. Results-The 2 manipulations that caused the greatest significant increase in mean IOP were lateral eyelid extension with compression of both jugular veins (difference from baseline IOP, 17.6 mm Hg; 95% confidence interval [CI], 15.7 to 19.5 mm Hg) and lateral eyelid extension alone (16.5 mm Hg; 95% CI, 14.6 to 18.4 mm Hg). Dorsoventral eyelid extension (6.42 mm Hg; 95% CI, 4.5 to 8.3 mm Hg) and compression of both jugular veins alone (3.0 mm Hg; 95% CI, 1.1 to 5.0 mm Hg) significantly increased mean IOP, compared with baseline. Compression of the ipsilateral jugular vein increased mean IOP (0.3 mm Hg; 95% CI, -1.6 to 2.2 mm Hg) from baseline, but not significantly. Conclusions and Clinical Relevance-Traction on the eyelids or pressure on both jugular veins can significantly increase IOP values as measured by use of applanation tonometry in clinically normal dogs.
J. Stiles. Departments of Veterinary Clinical Sciences, Comparative Pathobiology, School of Veterinary Medicine, Purdue University, West Lafayette, IN 47907, United States.
Classification:
5.3 Other (Part of: 5 Experimental glaucoma; animal models)
6.1.3 Factors affecting IOP (Part of: 6 Clinical examination methods > 6.1 Intraocular pressure measurement; factors affecting IOP)
