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PU/PD - Coggle Diagram
PU/PD
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Causes for PU/PD
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Central (Pituitary) DI
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Dramatic response to exogenous ADH, but usually not maximal
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Etiologies
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Rarely, no lesions are identified at necropsy
Age: Middle aged to older, Mature dogs are most likely to have tumors
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Primary Polydipsia
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PD = primary, PU = secondary
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If chronic, medullary washout may occur, decreasing medullary interstitial osmolality
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Diagnostic Approach
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Two questions to answer:
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If not, will patient respond to exogenous ADH?
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