From your condition, we can see that your GFR is already low, and for most patients, they may already be in dialysis. I think your good care on food do help a lot to maintain condition.
In most countries now, the only method for PKD is to wait, until it develops into kidney failure stage, and then start dialysis, and kidney transplant.
In recent years, we have developed the methods that can help shrink the cysts, and then reduce the pressure caused by the cysts, so the progress of the disease can be slowed down, your condition can be maintained, and then get improvements.
As to any oral medicines may be discharged out from the kidneys, which may increase the burden of the kidneys, so our hospital has used an external application of the traditional Chinese medicines, to let the medicines penetrate into the kidneys directly, and take effects on the cysts.
But before application of the medicines, the doctors need to examine your body, and then prescribe the medicines suitable for you, so the patients need to come to China if they want to have this treatment.
That's how we treat PKD patients. And expect Micro-Chinese medicines, for you are already in kidney failure stage, we suggest stem cells as well, combined with Chinese medicines, to achieve a better result. If you need any help, please let me know. Contact mail: firstname.lastname@example.org