Retrospective evaluation of pre‐surgical electroretinography results in a mixed‐breed canine population presented for cataract removal surgery

Wegg, Michaela; Pollard, Danica; Ofri, Ron

doi:10.1111/vop.13001

Veterinary Ophthalmology

2022

DOI: 10.1111/vop.13001

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Retrospective evaluation of pre‐surgical electroretinography results in a mixed‐breed canine population presented for cataract removal surgery

Michaela Wegg

Danica Pollard

Ron Ofri

Abstract: is a non-invasive diagnostic modality used to record retinal responses to light stimulus.The most commonly used stimulus is flash, allowing the recording of full-field ERG (fERG). By changing various parameters of the stimulus, such as its intensity, frequency, and pre-recording ambient light levels, one can adapt the

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2023

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Clinical usefulness of transient visual evoked potentials (TVEPs) and steady-state visual evoked potentials (SSVEPs) results in blind dogs

Lee

Kim

2023

Preprint

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Background Visual evoked potentials (VEPs) are used to assess the function of the visual pathway from the retina to the visual cortex. According to the stimulation frequency, VEPs are classified into transient VEPs (TVEPs) and steady-state VEPs (SSVEPs). This study aimed to assess TVEPs and SSVEPs of blind dogs (n = 26) and compared them with those of healthy dogs (control group, n = 13). According to the location of the lesion that caused blindness, the dogs were classified into pre-retinal, retinal, and post-retinal groups. TVEPs and SSVEPs were assessed without anesthesia or sedation. The P2 latency and Negative 1-Positive 2 (N1-P2) amplitude were evaluated in TVEPs, and the signal-to-noise ratio (SNR) and response amplitude (RA) were evaluated in SSVEPs.Results The N1-P2 amplitude (p < 0.001), SNR (p = 0.039), and RA (p < 0.001) were significantly decreased in the post-retinal group compared with those in the control group. The SNR (p < 0.001) and RA (p < 0.001) in the retinal group were significantly lower than those in the control group. The TVEPs and SSVEPs values did not differ significantly between the pre-retinal and control groups. The receiver operating characteristic (ROC) curves showed that the area under the curve value of the RA of SSVEPs (0.928) was higher than that of the N1-P2 amplitude of TVEPs (0.873) in dogs with post-retinal lesions.Conclusions SSVEP parameters can be used to diagnose the cause of blindness and are more suitable for use in veterinary clinical practice than TVEP parameters.

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Clinical usefulness of transient visual evoked potentials (TVEPs) and steady-state visual evoked potentials (SSVEPs) results in blind dogs

Lee

Kim

2023

Preprint

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Retrospective evaluation of pre‐surgical electroretinography results in a mixed‐breed canine population presented for cataract removal surgery

Cited by 1 publication

References 31 publications

Clinical usefulness of transient visual evoked potentials (TVEPs) and steady-state visual evoked potentials (SSVEPs) results in blind dogs

Clinical usefulness of transient visual evoked potentials (TVEPs) and steady-state visual evoked potentials (SSVEPs) results in blind dogs

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