Comparison of the<scp>TONOVET</scp>Plus®, TonoVet®, and Tono‐Pen Vet™ tonometers in normal cats and cats with glaucoma

Kiland, Julie A.; Terhaar, Hannah M.; Walleck, Hannah E.; Chen, Nickolas; McDaniel, Kyle; McLellan, Gillian J.

doi:10.1111/vop.13123

Cited by 3 publications

(3 citation statements)

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“…Kiland et al . [ 5 ] compared IOP values in normal and glaucomatous cats, showing a strong correlation between TonoVet® and TonoVet Plus®. TonoVet® showed slightly higher IOP values than TonoVet Plus® [ 5 ].…”

Section: Discussionmentioning

confidence: 99%

“…[ 5 ] compared IOP values in normal and glaucomatous cats, showing a strong correlation between TonoVet® and TonoVet Plus®. TonoVet® showed slightly higher IOP values than TonoVet Plus® [ 5 ]. Our results showed no significant differences between IOP values measured using TonoVet® and TonoVet Plus®.…”

Section: Discussionmentioning

confidence: 99%

“…IOP ranges can be found in literature for TonoPet® (New York, USA), TonoVet®, and recently some reports for TonoVet Plus®, mainly in dogs and cats [ 4 , 5 ]. Because previously published reference ranges for IOP in healthy animals are device-specific, using any of the devices, it is strongly recommended to use appropriate reference values according to the device.…”

Section: Introductionmentioning

confidence: 99%

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Comparison of Tonovet® and Tonovet plus® tonometers for measuring intraocular pressure in dogs, cats, horses, cattle, and sheep

Kovalcuka,

Mālniece,

Vanaga

2024

Vet World

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Background and Aim: Reference ranges for intraocular pressure (IOP) in healthy animals are device-specific; therefore, it is strongly recommended to use appropriate reference values according to the device. Therefore, our aim was to compare IOP readings made by TonoVet® and TonoVet Plus® in healthy dogs, cats, sheep, cattle, and horses. We compared IOP values measured by TonoVet® and TonoVet Plus® tonometers in clinically normal eyes of dogs, cats, horses, cattle, and sheep. Materials and Methods: Five groups comprising 20 animals each of dogs (various breeds, 9 months–10 years old, 14 females, 6 males), cats (various breeds, 6 months–12 years old, 8 females, 12 males), horses (various breeds, 5–12 years old, 12 females, 8 males), cattle (Holstein, 1–7 lactation, female), and sheep (Latvian Darkhead ewes, 1–8 years old) were included in the study. Both eyes of all animals were subjected to ophthalmic examination, including evaluation of IOP by rebound tonometry using TonoVet® and TonoVet Plus® devices. Normality was determined using the Shapiro–Wilk test. The independent t-test was used to determine differences between IOP values in the right and left eyes and between both tonometers. This study was approved by the Ethical Commission of the Latvia University of Life Sciences and Technologies (Nr. LLU_Dzaep_2022-2-4). Results: No differences in IOP between the right and left eyes were found in all cases (p > 0.05). The mean IOP ± standard deviation values in both eyes for TonoVet® and TonoVet Plus® tonometers were as follows: for dogs, 15.25 ± 2.73 mmHg and 19.65 ± 3.46 mmHg; and in cats, 18.88 ± 3.98 mmHg and 18.78 ± 4.26 mmHg, respectively. In horses, mean IOP was 22.15 ± 3.74 mmHg and 24.28 ± 3.00 mmHg; in cattle, 24.73 ± 2.89 mmHg and 23.28 ± 2.97 mmHg; and in sheep, 18.05 ± 3.54 mmHg and 22.49 ± 4.66 mmHg, respectively. Significant differences in IOP values were observed between the tonometers in sheep, dog, and horse groups (mean difference –4.40, –4.48, and 2.13, respectively). Conclusion: This study showed significantly higher IOP values measured by the TonoVet Plus® tonometer in dogs and sheep. Keywords: cats, cattle, dogs, horses, sheep, TonoVet plus, TonoVet.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Comparison of Tonovet® and Tonovet plus® tonometers for measuring intraocular pressure in dogs, cats, horses, cattle, and sheep

Kovalcuka,

Mālniece,

Vanaga

2024

Vet World

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Effects of 0.024% latanoprostene bunod on intraocular pressure and pupil diameter in normal cats and cats with congenital glaucoma

Yang,

Eaton,

Kiland

et al. 2024

Veterinary Ophthalmology

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ObjectiveTo evaluate the effects of latanoprostene bunod on intraocular pressure (IOP) and pupil diameter (PD) in normal cats and cats with feline congenital glaucoma (FCG).Animals StudiedFive normal and 5 FCG cats.ProceduresThis masked, controlled crossover study comprised a 1‐day Pre‐treatment phase followed by two 10‐day Treatment phases, each followed by a 10‐day Recovery phase. During treatment, all cats received twice daily 0.005% latanoprost (LAT) or 0.024% latanoprostene bunod (LBN) in a randomized eye. Following Recovery, the same eye was treated with the opposite drug. Contralateral eyes served as saline‐treated controls. Intraocular pressure and PD measurements were performed three times daily during all study phases. Data were analyzed via constrained longitudinal data analysis models.ResultsNeither drug significantly reduced IOP in normal cats. In FCG cats, statistically significant reductions in mean (95% CI) IOP were observed relative to controls 4 h after LAT and LBN treatment (−5.5 mmHg [−8.4, −2.5], p < .001, −7.2 mmHg [−10.2, −4.3], p < .001, respectively). These differences represented 28.4% and 37.9% IOP reductions, respectively. Mean IOP reduction after 4 h was significantly greater with LBN treatment compared to LAT (−1.8 mmHg [−3.2, −0.4], p = .012). However, these IOP reductions were not considered clinically significant. Both drugs similarly reduced PD in normal and FCG cats.ConclusionsTransient IOP reduction was observed after topical administration of LAT and LBN in FCG cats; and mean IOP difference was statistically significantly greater in LBN‐treated eyes. However, the apparent enhanced hypotensive effect of LBN is not clinically significant.

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Comparison of three methodologies for measuring intraocular pressure in healthy cats

Ricci,

Passareli,

Nascimento

et al. 2024

Vet World

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Background and Aim: Measuring intraocular pressure (IOP) is crucial for identifying potentially damaging changes in the eyes, including diseases as glaucoma and uveitis. This study compared intraocular pressure (IOP) measurements in cats using the Tonovet and Tonovet Plus (rebound), Tono-Pen Avia Vet (applanation), and Kowa HA-2 (Goldman’s methodology applanation) tonometers. Materials and Methods: 55 healthy cats (108 eyes) were assessed through three distinct studies: An ex vivo experiment (10 eyes of five cats) to correlate IOP manometry and tonometry values and ascertain the correlation coefficient (r2); an in vivo study (10 eyes of five sedated cats) to contrast manometer and tonometer readings; and an outpatient clinical trial (80 eyes of 45 cats) to analyze only tonometer measurements. Results: The r2 values observed in the ex vivo study were Tonovet (0.923), Tonovet Plus (0.925), Tono-Pen Avia Vet (0.877), and Kowa HA-2 (0.901). The IOP values in mmHg in the in vivo study were as follows: Manometer (16.1 ± 2.7), Tonovet (21.1 ± 3.6), Tonovet Plus (19.7 ± 7.2), Tono-Pen Avia Vet (17.6 ± 7.9), and Kowa HA-2 (16.8 ± 2.0). In the outpatient clinical study, the IOP values in mmHg were as follows: Tonovet (19.7 ± 6.6), Tonovet Plus (17.1 ± 5.4), Tono-Pen Avia Vet (16.3 ± 4.3), and Kowa HA-2 (14.5 ± 2.2). Conclusion: IOP and manometry readings were strongly correlated by all tonometers. In the clinical setting, the most and least IOP measurements were recorded using Tonovet and Kowa HA-2, respectively, stressing the importance of an IOP reference table for each tonometer in feline practice. Keywords: applanation tonometry, goldmann tonometry, intraocular pressure, ocular manometry, rebound tonometry.

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Comparison of theTONOVETPlus®, TonoVet®, and Tono‐Pen Vet™ tonometers in normal cats and cats with glaucoma

Cited by 3 publications

References 37 publications

Comparison of Tonovet® and Tonovet plus® tonometers for measuring intraocular pressure in dogs, cats, horses, cattle, and sheep

Comparison of Tonovet® and Tonovet plus® tonometers for measuring intraocular pressure in dogs, cats, horses, cattle, and sheep

Effects of 0.024% latanoprostene bunod on intraocular pressure and pupil diameter in normal cats and cats with congenital glaucoma

Comparison of three methodologies for measuring intraocular pressure in healthy cats

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