Rajaei Seyed Mehdi, Asadi Faezeh, Rajabian Mohammad Reza, Ostadhassan Hesam, Crasta Manuela
Department of Clinical Sciences, College of Veterinary Medicine, Karaj Branch, Islamic Azad University, Alborz, Iran.
Faculty of Veterinary Medicine, University of Semnan, Semnan, Iran.
Vet Ophthalmol. 2018 Mar;21(2):140-143. doi: 10.1111/vop.12487. Epub 2017 Jun 20.
To determine the effect of body position, eyelid manipulation, and manual jugular compression on intraocular pressure (IOP) in clinically normal cats.
TWENTY-ONE ADULT CLIENT-OWNED DOMESTIC SHORTHAIR CATS: PROCEDURES: The IOP was measured by means of rebound tonometer. A baseline IOP was measured in all cats in ventral recumbency with normal head position (horizontal to the ground) with no pressure on the neck or eyelids. To measure the IOP in dorsal recumbency, each cat was held in the dorsal recumbency position for 5 min. Four different manipulations were used, including maximal dorsoventral extension of the eyelids, lateral eyelid extension, manual compression of the ipsilateral jugular vein, and manual compression of both jugular veins. IOP after all the manipulations was measured in ventral recumbency.
Overall the mean ± SD IOP values of all eyes in ventral recumbency, dorsal recumbency, maximal dorsoventral extension of the eyelids, lateral eyelid extension, compression of the right jugular vein, compression of the left jugular vein, and compression of the both jugular veins were 16.1 ± 2.9 mmHg, 17.1 ± 5.0 mmHg, 21.7 ± 5.8 mmHg, 22.4 ± 5.6 mmHg, 15.0 ± 3.7 mmHg, 14.9 ± 3.7 mmHg, and 16.1 ± 4.6 mmHg, respectively. IOP was increased significantly in maximal dorsoventral extension of the eyelids (P = 0.001) and lateral eyelid extension (P = 0.001) compared to baseline.
Results of this study may be beneficial for clinicians to be aware of the effects of body position, traction, and compression of the eyelids and neck on IOP during ophthalmic examination in cats.
确定体位、眼睑操作和手动压迫颈静脉对临床正常猫眼压（IOP）的影响。
21只成年客户拥有的家养短毛猫
使用回弹眼压计测量眼压。所有猫均在腹卧位、头部位置正常（与地面水平）、颈部和眼睑无压力的情况下测量基线眼压。为了测量背卧位的眼压，每只猫保持背卧位5分钟。使用了四种不同的操作方法，包括眼睑最大程度的背腹伸展、眼睑向外侧伸展、手动压迫同侧颈静脉以及手动压迫双侧颈静脉。所有操作后均在腹卧位测量眼压。
总体而言，所有眼睛在腹卧位、背卧位、眼睑最大程度背腹伸展、眼睑向外侧伸展、压迫右侧颈静脉、压迫左侧颈静脉以及压迫双侧颈静脉时的平均±标准差眼压值分别为16.1±2.9 mmHg、17.1±5.0 mmHg、21.7±5.8 mmHg、22.4±5.6 mmHg、15.0±3.7 mmHg、14.9±3.7 mmHg和16.1±4.6 mmHg。与基线相比，眼睑最大程度背腹伸展（P = 0.001）和眼睑向外侧伸展（P = 0.001）时眼压显著升高。
本研究结果可能有助于临床医生在猫的眼科检查过程中了解体位、眼睑牵引和压迫以及颈部压迫对眼压的影响。
