Kidney Function
This is really a question for your surgeon.
When creatinine is at 1.4 is still in the normal range, albeit high, so there is no positive indicator of kidney disease in that number alone. With your GFR being too low, that is "Perhaps" a concern. Still, there could be many reasons contributing to this beside a kidney malfunction. How long your GFR has been low can be a factor of consideration, as well as medications you might be taking. It is quite possible that moving forward with the surgery would best mitigate any risky health issue that would contribute to accelerating the advancement of kidney disease if you have any. I think your surgeon will consider your current state of health vs your projected recovery rate. Also, depending on what he/she thinks might be causing this, he/she may determine that WLS will help reverse these numbers. For example, without knowing you, it's possible that diabetes is the contributing factor in this disparity, and often times WLS helps that particular condition to go in remission.
Again, no one here can diagnose you or determine if you are a candidate or not, you really need to have your own doctor make these decisions with you.
I work with dialysis patients and have a few that have had RNY, and i have have a couple that are considering it. I tell them the same thing. Your nephrologist and bariatric surgeon will want to discuss your health history and current status to make sure the surgery and aftercare can be tailored to your individual needs and not exacerbate your kidney disease.
