I would like to hear how other institutions are handling low GFR's. At my institution, we recently started calculating GFR's for both CT. If GFR is below 60 for CT, we hydrate patients prior to the CT with contrast. The hydration process is 200cc/hr x 2 hours prior to contrast administration and 200cc/hr x 2 hours after contrast. The bad thing is that patients are coming to the hospital for what they think is a 30-60 minute visit winds up being 4 1/2 to 5 hours. We previously were just taking creatinines into consideration, but now that GRF calculations are used, many people with normal creatinines are havubg ti receuve hydration.