https://www.vetsurgeon.org/f/clinical-questions/26106/bun-crea-ratio Hi everyone, I was wondering what are the common thoughts for the BUN:CREA ratio, is it something reliable to determine whether the azotemia is pre-renal or renal? Thanks en-USTelligent Community 10https://www.vetsurgeon.org/thread/183621?ContentTypeID=1Mon, 28 Aug 2017 13:50:00 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:96cba71a-e8a0-48df-a2f8-dbe0bad39076pablo sordo pedro<p>Great! thanks very much!</p><div style="clear:both;"></div>https://www.vetsurgeon.org/thread/183614?ContentTypeID=1Mon, 28 Aug 2017 10:21:55 GMT146601cc-3922-4be7-9974-7e1d4e45a66b:7d9af218-c887-4850-8f62-fa9b242fe642gerard mclauchlan<p>Hi Pablo</p> <p>i don&#39;t look at ratio exactly but if the magnitude of elevation of urea is greater than creat (e.g. Urea of 40 (4 X upper ref) and creat of 259 (1.5 x upper ref)) then I assume there is likely a pre renal component &nbsp;(dehydration vs gastric bleed). Obviously USg and total solids etc should be looked at concurrently&nbsp;</p><div style="clear:both;"></div>