Sugar in urine but not in blood: sugar, urine

by: GwynforWebPosted on 2005-02-07 at 22:59:33ID: 13251899

If you have zero blood sugar your are probably dead
http://www.cs.odu.edu/~cpi/cpi95-96/Projects/wellness/blood-sugar.html

by: ozoPosted on 2005-02-07 at 23:19:53ID: 13251956

What can cause high urine sugar with low blood sugar.

by: trommPosted on 2005-02-08 at 02:37:03ID: 13252842

According to my wife, she is a clinical chemist there are a number of possibilities, in order of frequency:

1. The bottle that contained the urine sample has not been cleaned properly and contained for instance lemonade before (hopefully) the urine.
2. Diabetes with high variability of blood sugar levels
3. Problably there are a few metobolism disorders that may have this as a symptom

by: ozoPosted on 2005-02-08 at 02:58:53ID: 13252925

Thank you. Could you elaborae on the possible metobolism disorders?
Could cancer chemotherapy be a factor?

by: trommPosted on 2005-02-08 at 03:53:38ID: 13253187

Sorry. I am myself not an md or chemist, my wife is, but she is not available now. Anyway if this has any real consequences I would advise you or somebody else that has this symptom to consult a regular physician.

by: grg99Posted on 2005-02-08 at 04:19:33ID: 13253329

The kidneys cant MAKE sugar, so any sugar in the urine MUST have come from the blood, or some contamination of the sample.

Most people have kidneys that start spilling sugar into the urine when it gets to around 150 to 200mg/dl.

Normal blood sugar levels are more in the range of 70 to 120, so under normal circumstances there should be no sugar excreted.

If there's sugar in the urine, and normal levels in the blood, then there must have been a sugar peak, probably after a large meal, and/or these particular kidneys have a low sugar spill threshold.

by: ozoPosted on 2005-02-08 at 04:35:54ID: 13253416

Thank you. Do you know what can cause a low sugar spill threshold?
The regular physician is puzzled. I was seeking a second opinion.

by: grg99Posted on 2005-02-08 at 05:24:29ID: 13253724

I'm no doctor, but I'd ask for a glucose tolerance test.

The fasting blood sugar level might be just fine, but after gulping a sugar cocktail it might rise more than normal.

Not a big problem, it's usually treatable with some simple pills, diet, and or exercise.

by: BrianGEFF719Posted on 2005-02-08 at 18:31:11ID: 13260665

http://www.afraidtoask.com/askdoc/

try that maybe..

by: diegofulPosted on 2005-02-13 at 18:44:48ID: 13300972

i think sugar and glucose can be treated as the same thing here. So try this:

http://www.anytestkits.com/utk-glucose-in-urine.htm

by: diegofulPosted on 2005-02-13 at 18:48:52ID: 13300991

i think a bladder infection can cause this. I am defenitely sure that it is not a methabolic problem. It has to be a problem between the kidneys and the bladder. An urologist would definitely know where to start looking for it.

by: dhsindyPosted on 2005-02-14 at 10:08:25ID: 13306587

Is she pregnant? Pregnant women sometimes have sugar in the urine with a normal blood sugar level.

by: dhsindyPosted on 2005-02-17 at 09:38:52ID: 13337057

Guess not.

by: QuicksterPosted on 2005-02-17 at 17:10:21ID: 13341689

IANAD

I'm reasonably confident this isn't metabolic. The vast majority of sugar metabolism happens upstream of the ureter (e.g. liver, muscle). And even if the kidney was "leaking" sugar, that would be very unlikely to reduce blood-sugar to zero (as someone said, you'd be dead).

So, three possibilities:
a) glycogen production is way up, but sugar is being lost somewhere beyond the ureter (i.e. bladder) <-- no clear diagnosis of this that I'm aware of.
b) bad assay
c) bacterial infection somewhere in the urinary tract that's converting some small molecules into sugar

You need to have the test replicated to rule out b) before worrying about a) or c) though.

by: infexPosted on 2005-02-19 at 07:06:01ID: 13353637

I should draw your attention on the fact that the eventual amount of sugar in the urine (which is for normal persons in normal conditions 0 mg/l) is in fact some kind of an average over time.

The concentration in the blood can be considered as an immediate value.

Consider following example:

Someone has for some reason a high amount of sugar in the blood. This causes sugar to go in the urine (which stays in the bladder). A bit later he does intensive sports, or has an injection of insuline. Blood sugar drops to normal values. In the mean time the urine with the sugar is still in the bladder. Some time after that both blood and urine are controlled. The measurement for the blood shows normal levels. The urine sample (which still contains the sugar as the person concerned did not go to toilet in the mean time) is measured as having too much sugar.

Hope this helps

by: infexPosted on 2005-02-19 at 07:08:23ID: 13353652

Note : if I did write sugar, I of course mean glucose more properly speaking.

by: BrianGEFF719Posted on 2005-02-19 at 14:42:28ID: 13355359

I personally take my urine without sugar, some like it with, some like it without, its all personal preference. :0

by: Sune_StevnsborgPosted on 2005-04-09 at 08:48:56ID: 13743982

A typical symptom of diabetes Type II is a high concentration of glucose in the urine, but is not consistent with low blood sugar.
Renal Tubular disease can cause both high levels of glucose in the urine and low blood sugar.

This is according to my wife’s schoolbooks; you should look in to “Renal Tubular disease”.

by: dhsindyPosted on 2005-04-20 at 03:47:35ID: 13822981

Not a doctor either but a recently diagnosed Type II diabetic. Type I is the type that people have all their lives or from an accident or something that destroys their ability to make insulin. Type II has three causes: 1) insulin output has decreased; 2) glucose from the liver is to high (yes, your liver can dump glucose into the blood if it detects you need it); and, 3) the cells in the body become insulin intolerant (takes more insulin before the cells can use the sugar).

Noone has mentioned an A1C test. This is a blood test that must to be sent to a laboratory. Here's how it works: glucose (crystals or molecules - I forget) in the blood attach to the hemoglobin. The hemoglobin cells live about three months. In the laboratory the technician using a microscope looks at a slide of your blood. By estimating the age of the hemoglobin cells and counting how much sugar is attached they come up with a number.

A normal person's A1C test result is usually 5-6. My first one was 13, ouch. My blood sugar was running 400-500 mg/dL (milligrams per deci-Liter).

The doctor put me on 1500 calorie diabetic diet, pills and mild execise. My blood glucose, now, is usually in the high normal range and I have been losing about a week. If I get my weight under control there is a good chance I will not need pills.

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Sugar in urine but not in blood

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