Sorry I did not finish typing the previous post - we had company. They have just left.
You need not worry needlessly and prematurely.
Did you know that there can be many causes of an elevated creatinine level? For instance, you could have kidney stones obstructing your urinary tract. That would also explain your kidney difficulties.
Many drugs affect blood creatinine levels - the diuretics, for instance. You have been taking the Hctz. Some vitamins, such as vitamin C, and some antibiotics also elevate creatinine levels. Other drugs affect the creatinine clearance level or BUN to creatine ratio in some people - captopril, steroids, etc. Eating a lot of beef or other meat 24 hours prior to your blood creatinine test will result in an increased blood creatinine level. Strenuous exercise two days prior to a creatinine clearance test affects the reading. Other causes of high creatinine blood levels are dehydration, gout, excessive blood loss through bleeding in the digestive tract, hypothyroidism, various muscle diseases and conditions. So, you see, even though high creatinine levels could mean some sort of a kidney disease, they are just as likely to be a result of other conditions. (I don't know if this is going to make you feel better???
). Who knows, you might have exercised and eaten a t-bone steak afterward on the day before your test.
I would suspect your diuretic. I am on two different ones. They tend to interfere with my electrolytes, urea, cholesterol and other labs. Your nephrologist will rule many conditions out by ordering certain tests. Sometimes a complete kidney workup is all that's needed to clear things up for good. A high creatinine blood level in the context of low creatinine clearance level usually means that not enough creatinine is being removed by the kidneys. Some people can have kidney disease, yet their creatinine level remains completely normal.
Please do not have any sleepless nights over this. I know you will feel much better after a few additional tests. You should be glad a specialist will check you out. He will think of things your doctor could easily miss. One should never rely on the results of a single test. Obtaining identical test results on at least one (or more) other occassion is indicative of a possible irregularity. Did you have your creatine or creatinine tested? It is the creatinine that is measured routinely.