Atomfizikas un spektroskopijas institūts / Institute of Atomic Physics and Spectroscopy

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LU zinātniskais institūts / Scientific Institute of the University of Latvia

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Browsing Atomfizikas un spektroskopijas institūts / Institute of Atomic Physics and Spectroscopy by Subject "dogs"

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    Biophotonics in veterinary medicine: the first steps toward clinical translation
    (SPIE, 2019-02-20) Cugmas, Blaž; Spīgulis, Jānis
    In this paper, we analyzed the current situation and the potential of biophotonics and biomedical optics in veterinary medicine. Promising optical techniques such as optical coherence tomography, pulse oximeter, and hyperspectral imaging have been clinically translated into human medicine. But even though human and small animal medicine share personalized and state-of-the-art approach, biophotonics remains rarely exploited in the canine and feline medicine. However, there are some biophotonics studies in veterinary oncology which addressed tumor diagnosis (skin and subcutaneous tumors), prognosis (lymphoma), and therapy (clear surgical margins). Visible and near-infrared spectroscopy served for measuring various physiological parameters related to circulation, and photobiomodulation therapy was often used for the management of wounds, skin conditions, and orthopedic problems. In the research, the most popular clinically translated technique is thermography which was applied for the diagnosis of orthopedic problems and diseases as infections and hyperthyroidism. The future optical devices for small animals such as dogs and cats should be robust and resilient to damage (e.g., due to biting, chewing), offering user-friendly and short measurements. In veterinary oncology, biophotonics could replace invasive fine-needle aspiration procedure. The potential of a pulse oximeter for pet monitoring has yet to be explored. What is more, photobiomodulation efficiency should be tested in an extensive clinical (in vivo) study. The technique would be very beneficial in dentistry which currently requires expensive and risky anesthesia.
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    Clinical evaluation of automated capillary refill time estimation in dogs and cats
    (SPIE, 2019-02-26) Cugmas, Blaž; Štruc, Eva; Spīgulis, Jānis
    In this study, we clinically evaluated a pulse oximeter-based device for automated capillary refill time (CRT) estimation in dogs and cats. CRT can reveal conditions like shock or anemia in dogs and cats. However, visual CRT estimation has low repeatability, and the available optical systems for automated estimation are not suitable for pets. We evaluated a custom-made portable CRT measuring device on various measurement sites of 12 dogs and 11 cats with parallel visual CRT estimation on the gum by treating veterinarian. The capillary refill was also recorded by a video camera for reference. The visual and video procedures were moderately correlated with the coefficient of 0.61; visual CRT values were on average for 0.18 s longer than the reference. On average, ~32% of measurements with the proposed device were successful. The rest failed due to excessive pigmentation, motion artifacts, and other pressure-induced effects. The measurement sites of the metacarpal pad, digit, and tail were moderately correlated with the reference values with coefficients of 0.53, 0.58, and 0.42, respectively.