• J. Vet. Med. Sci. · Apr 2015

    Quantitative assessment of pupillary light reflex in normal and anesthetized dogs: a preliminary study.

    • Jury Kim, Jiseong Heo, Dongbeom Ji, and Min-Su Kim.
    • College of Veterinary Medicine, Chonbuk National University, 664-14 Duckjin-dong, Duckjin-ku, Jeonju 561-756; Ji dong Beom Animal Hospital, 266-10 Bugok-dong, Geumjeong-ku, Busan, 609-822, Republic of Korea.
    • J. Vet. Med. Sci. 2015 Apr 1; 77 (4): 475-8.

    AbstractThe purpose of this study was to quantitatively assess the pupillary light reflex (PLR) in normal and anesthetized dogs using a pupillometer. Eleven dogs (20 eyes) of various breeds were included. PLRs were measured with a handheld pupillometer in dim light before and during anesthesia. Anesthesia was conducted with atropine, xylazine and ketamine. Parameters of pupillometry included neurological pupil index (NPi), pupil size, percent of change (%CH), latency (LAT), constriction velocity (CV), maximum constriction velocity (MCV) and dilation velocity (DV). NPi,%CH, CV and MCV were significantly decreased during anesthesia compared with the pre-anesthesia data. The results suggest that atropine-xylazine-ketamine combination anesthesia depresses the PLR. Additionally, this study demonstrates the feasibility of the use of a pupillometer in dogs.

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