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Variation in intraocular pressure following application of tropicamide in three different dog breeds

Taylor, Nicole R., Zele, Andrew J., Vingrys, Algis J. , & Stanley, Robin G. (2007) Variation in intraocular pressure following application of tropicamide in three different dog breeds. Veterinary Ophthalmology, 10(1(Supp.)), pp. 8-11.

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Abstract

OBJECTIVE: To record intraocular pressure (IOP) of three different dog breeds following administration of one drop of 1% tropicamide.

ANIMALS: Three dog breeds -- Golden Retrievers (n = 20), Siberian Huskies (n = 20) and English Cocker Spaniels (n = 36) -- were studied.

PROCEDURE: IOPs were measured using a Tonopen following corneal anesthesia with a single drop of 0.5% proxymetacaine. A drop of 0.5% tropicamide was then administered bilaterally and a second IOP measurement was taken 30 min later (postdilation). The difference between the two measurements was considered as the effect of mydriasis on IOP.

RESULTS: Dogs had an average IOP of 14.9 +/- 3.2 mmHg, with 95% confidence limits ranging from 8 to 22 mmHg. There were significant differences between breeds (P < 0.006) with Siberian Huskies having higher IOPs (17.2 +/- 3.7 mmHg) than the other breeds (Spaniels: 14.2 +/- 2.8 mmHg, P < 0.01; Retrievers: 14 +/- 1.9 mmHg, P < 0.001). The majority (60%) of dogs displayed 5 mmHg or less in IOP change postmydriasis. Siberian Huskies showed the highest IOP levels, and also had the greatest variability with dilation.

CONCLUSIONS AND CLINICAL RELEVANCE: Interbreed variability in effect of tropicamide of canine IOP is evident.

Impact and interest:

4 citations in Scopus
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3 citations in Web of Science®

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ID Code: 12158
Item Type: Journal Article
Additional Information: For more information, please refer to the journal’s website (see hypertext link) or contact the author.
DOI: 10.1111/j.1463-5224.2007.00485.x
ISSN: 1463-5216
Subjects: Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > VETERINARY SCIENCES (070700) > Veterinary Medicine (070706)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300)
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OPTOMETRY AND OPHTHALMOLOGY (111300) > Vision Science (111303)
Australian and New Zealand Standard Research Classification > AGRICULTURAL AND VETERINARY SCIENCES (070000) > VETERINARY SCIENCES (070700)
Divisions: Current > Research Centres > Centre for Health Research
Current > QUT Faculties and Divisions > Faculty of Health
Current > Institutes > Institute of Health and Biomedical Innovation
Copyright Owner: Copyright 2007 Blackwell Publishing
Copyright Statement: The definitive version is available at www.blackwell-synergy.com
Deposited On: 22 Jan 2008
Last Modified: 13 Nov 2012 08:49

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