Why is urine diluted in diabetes insipidus?

Patients with diabetes insipidus have high amounts of urine that is diluted (clear) because of this inability to control the amount of water in the urine. Most cases of diabetes insipidus occur because there isn’t enough ADH, or because the kidneys are not responding properly to ADH.

How does diabetes cause diluted urine?

Diabetes Insipidus Causes (Vasopressin is also called antidiuretic hormone or ADH.) When you’re thirsty or a little dehydrated, your vasopressin levels go up. Your kidneys absorb more water and put out concentrated urine. If you’ve had enough to drink, vasopressin levels fall, and what comes out is clear and diluted.

Why would someone with diabetes insipidus drink more water than normal?

Without ADH, the kidneys do not work properly to keep enough water in the body. The result is a rapid loss of water from the body in the form of dilute urine. This results in the need to drink large amounts of water due to extreme thirst and to make up for excessive water loss in the urine (10 to 15 liters a day).

Does diabetes affect urine flow?

Diabetes can also impair the relaxation of the internal urethral sphincter (urethral smooth muscle), which also affects the flow of urine out. The bladder can also become overactive: the damaged nerves can send wrong signals to the bladder, making it squeeze and expel fluids without warning.

Why would dilute urine be excreted?

Normally, most of the water is reabsorbed, and only a small amount of concentrated urine is excreted. DI occurs when the kidneys cannot concentrate the urine normally, and a large amount of dilute urine is excreted. The amount of water excreted in the urine is controlled by antidiuretic hormone (ADH).

Why is my pee clear like water?

If your pee is crystal clear, you’re probably drinking too much H20, which can throw off your electrolyte balance in potentially harmful ways. “Your body can normally regulate its water and sodium levels pretty well,” Moore says.

How does diabetes mellitus differ from diabetes insipidus?

Diabetes mellitus is more commonly known simply as diabetes. It’s when your pancreas doesn’t produce enough insulin to control the amount of glucose, or sugar, in your blood. Diabetes insipidus is a rare condition that has nothing to do with the pancreas or blood sugar.

Why do I pee so much with diabetes?

When you have diabetes, excess glucose — a type of sugar — builds up in your blood. Your kidneys are forced to work overtime to filter and absorb the excess glucose. When your kidneys can’t keep up, the excess glucose is excreted into your urine, dragging along fluids from your tissues, which makes you dehydrated.

Can diabetics drink too much water?

Excessive thirst in diabetes is called polydipsia. It’s common in both diabetes mellitus and diabetes insipidus. Diabetes mellitus, which includes type 1 and type 2 diabetes, happens when your blood sugar is too high.