Document Detail

Comparison of a rebound and an applanation tonometer for measuring intraocular pressure in normal rabbits.
MedLine Citation:
PMID:  21929609     Owner:  NLM     Status:  In-Data-Review    
Objective  To compare intraocular pressure (IOP) measurements made on healthy adult rabbits without the effect of tranquilizers using the new applanation tonometer, Tono-Pen Avia(®) , and the rebound tonometer Tonovet(®) . Methods  Intraocular pressure was measured throughout the day (6:00, 9:00, 12:00, 15:00, and 18:00 h) in 38 adult New Zealand White rabbits (76 eyes). The animals were 20 males and 18 females, with a mean weight of 3.5 kg and an average age of 6 months. A complete ocular exam (including Schirmer tear test, fluorescein staining, slit-lamp biomicroscopy, and direct ophthalmoscopy) was performed on all animals at the beginning of the trial. Rebound tonometry was performed, and after 10 min, anesthetic drops were instilled and applanation tonometry was carried out. IOP values obtained using the two techniques were analyzed statistically. Results  The mean IOP was 9.51 ± 2.62 mmHg with Tonovet(®) , and 15.44 ± 2.16 mmHg with the Tono-Pen Avia(®) . Significant differences between measurements with the two tonometers were observed (P < 0.001). The linear regression equation describing the relationship between the two tonometers was y = 0.4923x + 10.754 (y = Tonovet(®) and x = Tono-Pen Avia(®) ). High IOPs were recorded in the early measurements (6:00), but the average IOPs from both devices were statistically similar throughout the day (P = 0.086). The correlation coefficient was r(2)  = 0.357. No significant difference in IOP regarding gender was observed. Conclusion  The Tono-Pen Avia(®) recorded higher levels of IOP compared with the Tonovet(®) . Early in the day, the IOP of rabbits was higher than later in the day, regardless of the tonometer used.
Fabiana Quartiero Pereira; Bernardo Stefano Bercht; Mírian Gomes Soares; Maurício Grillo Bittencourt da Mota; João Antonio Tadeu Pigatto
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Publication Detail:
Type:  Journal Article     Date:  2011-04-18
Journal Detail:
Title:  Veterinary ophthalmology     Volume:  14     ISSN:  1463-5224     ISO Abbreviation:  Vet Ophthalmol     Publication Date:  2011 Sep 
Date Detail:
Created Date:  2011-09-20     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  100887377     Medline TA:  Vet Ophthalmol     Country:  England    
Other Details:
Languages:  eng     Pagination:  321-6     Citation Subset:  IM    
Copyright Information:
© 2011 American College of Veterinary Ophthalmologists.
School of Veterinary Medicine, Federal University of Rio Grande do Sul, UFRGS, Porto Alegre, RS, Cx Postal 15004, 91540-000, Brazil.
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