Melbourne Veterinary School - Theses

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Subject: canine × Subject: continuous glucose monitoring × Subject: feline × Type: Masters Research thesis × Author: Lott, Katie ×

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    Evaluating effectiveness of a Continuous Glucose Monitoring System (CGMS) in diabetic dogs and cats
    Lott, Katie ( 2018)
    Real-time continuous glucose monitoring systems (CGMS) measure interstitial glucose concentrations, and have been used in the management of diabetes mellitus in people, dogs and cats. The devices are used for up to 72 hours, and provide glucose measurements every 5 minutes, with 288 data points provided in a 24-hour period. This provision of a detailed insight into glycaemic control over a longer period of time than traditional methods of monitoring holds the potential for improved management of diabetes mellitus. The primary aim of this study was to determine if CGMS (using the Guardian™ system) resulted in different clinical decision making compared with monitoring serial blood glucose curves and serum fructosamine concentration in diabetic dogs and cats. Secondary aims were to determine the incidence of nocturnal hypoglycaemia and rebound hyperglycaemia in diabetic dogs and cats. Continuous glucose monitoring and fructosamine measurement were performed in client-owned dogs and cats, both newly and previously diagnosed with diabetes mellitus. A retrospective serial glucose curve was plotted with glucose measurements every 2 hours obtained from the CGMs data. Results of the three monitoring modalities along with historical data (i.e. appetite, thirst, insulin dosage) were collated and a blinded review performed by two board certified small animal internal medicine clinicians. Statistical analysis showed a difference in clinical treatment recommendations for the management of diabetic dogs and cats when using CGMs versus both serial glucose curves and serum fructosamine. Nocturnal hypoglycaemia was seen in 14.6% of diabetic dogs and cats and the 9.8% had episodes of the Somogyi effect.