Hi, I recently had routine blood test, and GfR was noted to be 41. My doctorcalled me and we began discussing test results. My GFR has steadily, quickly decreased from 60 in March of 2015, 55 in August of 2015.51 I Feb of 2016 andnow 42. This s the first time it was even mentioned to me. Obviously something significant is going on, and new blood is to be drawn in a week after I stopped taking anti infammatories (I am scheduled for lumbar spine surgery Aug 26.) Now they are planning ultrasound of kidneys. My PCP says thereis no increased risk in my spine surgery due to these numbers. I disagree after reading up on CKD. Sounds like I coulld be in big trouble, and there needs to be some urgency to determine what is going on with my kidneys. My BP is under control with meds. I am overwight.but chlesterol levels also managed with meds. I am a 59 year old mmale fomrer heavy smoker, 2 packs a day, quit smoking in Aug 2013. Any thoughts would be greatly appreciated!!