von Spiessen L, Karck J, Rohn K, Meyer-Lindenberg A
Lena von Spiessen, Chirurgische und Gynäkologische Kleintierklinik, Ludwig-Maximilians-Universität München, Veterinärstraße 13, 80539 München, E-Mail:
Tierarztl Prax Ausg K Kleintiere Heimtiere. 2013;41(4):213-20.
To evaluate the Tonovet® rebound tonometer in a larger number of dogs and cats free of ocular disease and to examine the impact of handling errors of the tonometer.
In 100 ophthalmologically healthy dogs (n = 80) and cats (n = 20) of different breeds (beagle, dachshund, retriever, brachycephalic dogs, domestic shorthair cats), the intraocular pressure (IOP) was measured bilaterally using the Tonovet® according to the manufacturer's instructions. Subsequently, different aspects of handling/positioning were altered (localisation and angle of impact, distance of probe to corneal surface). Finally a comparative measurement was made using the Tonopen Vet® applanation tonometer.
Mean IOP ± standard deviation (SD) in the dogs (160 eyes) was 13,7 ± 2.9 mmHg for the Tonovet® and 12.9 ± 3.1 mmHg for the Tonopen Vet®. In the cats (40 eyes) a IOP value of 16.7 mmHg ± 3.0 mmHg was obtained with the Tonovet® and 17.4 mmHg ± 3.0 mmHg with the Tonopen Vet®. Deviation from the manufacturer's recommendations on handling the Tonovet® during the measurement significantly affected the results obtained. Compared to the reference measurement, directing the Tonovet® onto the peripheral cornea (approximately 1.5 mm from the limbus) as well as reducing the measuring distance to <4 mm resulted in slightly elevated IOP readings. Substantial underestimation of IOP occurred with angular deviation of the measuring axis.
The Tonovet® rebound tonometer proved to be a valuable alternative to conventional tonometers for clinical use in dogs and cats. It is well tolerated by both canine and feline patients. However, the use of the Tonovet® in a clinical setting requires the examiner to consider potential sources of error when handling the tonometer to avoid false IOP readings.
在更多无眼部疾病的犬猫中评估Tonovet®回弹式眼压计，并研究眼压计操作误差的影响。
对100只不同品种（比格犬、腊肠犬、寻回犬、短头犬、家猫）的眼科健康犬（n = 80）和猫（n = 20），按照制造商说明使用Tonovet®双侧测量眼压（IOP）。随后，改变操作/定位的不同方面（撞击的位置和角度、探头与角膜表面的距离）。最后使用Tonopen Vet®压平眼压计进行对比测量。
犬（160只眼）使用Tonovet®测量的平均眼压±标准差（SD）为13.7 ± 2.9 mmHg，使用Tonopen Vet®为12.9 ± 3.1 mmHg。猫（40只眼）使用Tonovet®获得的眼压值为16.7 mmHg ± 3.0 mmHg，使用Tonopen Vet®为17.4 mmHg ± 3.0 mmHg。测量过程中偏离制造商关于Tonovet®操作的建议会显著影响测量结果。与参考测量相比，将Tonovet®对准周边角膜（距角膜缘约1.5 mm）以及将测量距离缩短至<4 mm会导致眼压读数略有升高。测量轴角度偏差会导致眼压严重低估。
Tonovet®回弹式眼压计被证明是犬猫临床使用中传统眼压计的一种有价值的替代方法。犬猫患者对其耐受性良好。然而，在临床环境中使用Tonovet®时，检查者在操作眼压计时需要考虑潜在的误差来源，以避免眼压读数错误。
