Brief Answer:
he might mean that you are dehydrated, (i.e., body water content is low)

Detailed Answer:

Hi,

To be honest, there is nothing like one kidney is dehydrated, Maybe your doctor could have meant something else. What we understand is that, once our body is dehydrated, ie if the fluid is low in our body, our kidneys function can be compromised. For example we do urea, and creatinine as the tests for our renal function mostly, if these are raised we say that the kidneys are not working properly, and maybe a sign of renal failure, However, if our body is dehydrated (low body water content), in such cases the urea can be raised, but the creatinine is normal, or the urea is disproportionately high to the creatinine, here we say that the raised urea is not because of the renal failure, rather this indicates that our body is dehydrated.

So this is what your doctor might have said, that the blood tests may indicate the above, which means our kidney tests are bad not because of the kidney, but because of our dehydration. This is temporary, and the tests return to normal in little time.
The treatment of this is to replace fluid. This can be done either by taking a lot of fluid orally to keep ourselves hydrated or if the problem is severe we can also be given drips to replace the water.

This I suppose he meant if only blood tests are done, however, if he had done any CT scan or ultrasound, he might mean something else. But mostly it is this (explained above) when we tell someone that the kidney is dehydrated. If you still have any confusion you can share the tests here so to explain it in more clearer words.

Hopes I have answered your question, I would be glad to answer anything else you need to know about this.
Kind Regards,
Dr. Rahman

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Brief Answer:
This means nothing looks to worry about.

Detailed Answer:

Hi, great to hear from you,

If these tests were fine, especially if the urea and creatinine are normal, we are confident to say nothing major is wrong with your kidneys, and by dehydration of one kidney, he probably means you need to take more fluid. ( but I am still not sure what he meant, but your kidneys are ok if the tests are ok, still to be sure you can ask your doctor, or if you could share your tests with us if you have them )
Your concern about your grand-mom renal cancer is right, but if the ultrasound was ok, this is pretty reassuring, this means you should not worry about it.
Slightly raised d dimers may be there, and if you do not have any leg swelling or shortness of breath, this should not be worried about, I would just like you can repeat it after sometimes like in two weeks to see it should decrease.
I would personally advise that these tests are pretty reassuring and you should not worry, however you should repeat them in some time like a month, or more, to be sure that these minor problems like dehydrated kidney, slightly raised d dimers, and the low HB, should be resolving.

Please feel free to ask more things if you need to know, I would be glad to answer.

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Brief Answer:
This may be raised because of your previous diseases, or much other reason

Detailed Answer:

Hi,

In fact, there are many reasons other then clots that can cause a raised level of D Dimer, however, that only modestly raises the level.
Causes include, just to mention here a few, like trauma, surgery, liver disease, heart diseases, pregnancy, or any inflammatory condition in the body,
I think this may be related to your diseases, like asthma, and eczema and Raynaud may all slightly increase the D Dimer level.
Sometimes, raised triglycerides, or raised uric acid, or RA factor may also show falsely high D dimer. However, in all these conditions, the value is not very high, while in blood clots, the value is very high most of the times.

Regarding fluid, this depends on person to person, and the climate as well, but for most of us, 2 to 3 liters of fluids per day (not only water, you can take other fluids like juices etc) is enough.

Kind regards

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