டயாபடீஸ் இன்சிபிடஸ், diabetes insipidus
What Is Diabetes Insipidus?
Diabetes insipidus is a rare condition that causes your body to make a lot of urine that is "insipid," or colorless and odorless. Most people pee out 1 to 2 quarts a day. People with diabetes insipidus can pass between 3 and 20 quarts a day.
Diabetes Insipidus vs. Diabetes Mellitus
Diabetes insipidus is a different disease from diabetes mellitus. Their names are similar, but the only things they have in common is that they make you thirsty and make you pee a lot.
If you have diabetes insipidus, the hormones that help your body balance liquids don’t work. Only one in every 25,000 people gets this condition.
With diabetes mellitus (often shortened to “diabetes”), your body can’t use energy from food like it should. It’s far more common. Around 100 million Americans have type 1 or type 2 diabetes.
Symptoms of Diabetes Insipidus
• Severe thirst
• Peeing a lot (your doctor might call this polyuria)
• Getting up to go a lot at night
• Preference for cold drinks
• Muscle pains
Dehydration is another symptom. You might notice:
• Feeling sluggish
Symptoms in Infants and Children
Many of the symptoms are similar in younger people. In infants, watch for:
• Slow growth
• Poor feeding
In children, signs include:
• Drinking a lot of water
• Peeing often, sometimes every hour
• New bedwetting or waking during the night to pee
Diabetes Insipidus Causes
Your body makes a hormone called vasopressin in a part of your brain called the hypothalamus. It’s stored in your pituitary gland. Vasopressin tells your kidneys to hold on to water, which makes your urine more concentrated. (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.
When your body doesn’t make enough vasopressin, the condition is called central diabetes insipidus. If you make enough but your kidneys don’t respond to it the way they should, you have nephrogenic diabetes insipidus.
In either form, the result is the same. Your kidneys can't keep water, so even if you’re dehydrated, they'll put out a lot of pale urine.
Diabetes Insipidus Risk Factors
Changes in the genes that you inherit from your parents can make you more likely to get diabetes insipidus. This happens in 1% to 2% of cases.
Types of Diabetes Insipidus
• Central diabetes insipidus. You get this when damage to your hypothalamus or pituitary gland affects how your body makes or puts out vasopressin. Your kidneys remove too much fluid from your body, and you pee more. This damage can result from:
o A tumor
o A head injury
o A blocked or bulging artery (aneurysm)
o Diseases such as Langerhans cell histiocytosis
• Nephrogenic diabetes insipidus. You get this when your kidneys don’t respond to vasopressin and take too much fluid from your bloodstream. Doctors don’t always know why it happens, but some causes include:
o A blocked urinary tract
o Chronic kidney disease
o High levels of calcium in your blood
o Low levels of potassium in your blood
o Some medications, like lithium
• Dipsogenic diabetes insipidus. This type, also known as primary polydipsia, happens when your body has trouble controlling thirst. When you drink, the liquid lowers the amount of vasopressin that your body makes, while making you pee more. Causes include damage to your hypothalamus or pituitary glands from:
o A tumor
o A head injury
• Some medications or mental health problems could make you more likely to get dipsogenic diabetes insipidus.
• Gestational diabetes insipidus. You get this type only during pregnancy. Sometimes, a woman’s placenta -- the organ that gives oxygen and nutrients to your baby -- makes an enzyme that breaks down vasopressin. Other pregnant women make more prostaglandin, a hormone-like chemical that makes their kidneys less sensitive to vasopressin. Most cases of gestational diabetes insipidus are mild and don’t cause clear symptoms. The condition usually goes away after birth, but it might come back in another pregnancy.
How Is Diabetes Insipidus Diagnosed?
Your doctor will do a physical exam. They’ll ask questions about your health history, including your family’s health. You might get a series of tests that include:
• Urinalysis. You’ll give a sample of your pee, and your doctor will send it to a lab to see whether it’s dilute or concentrated. They can also check for glucose, which can help them decide if you have diabetes insipidus or diabetes mellitus. You might need to collect your pee over a 24-hour period to see how much you’re putting out.
• Blood test. This will measure the electrolytes and glucose in your blood. This lets your doctor know if you have diabetes mellitus or diabetes insipidus. It may help them figure out which type.
• Fluid deprivation test. This measures the changes in your body weight, blood sodium, and urine concentration after you don’t drink anything for a while. There are two types:
o Short-form fluid deprivation test. You stop drinking for a short time. You collect a sample and take it back to your doctor, who sends it to a lab.
o Formal fluid deprivation test. You’ll have this done in a hospital so doctors can make sure you don’t get dehydrated. You’ll be weighed and give a sample every hour or two until:
Your blood pressure drops too low or you have a rapid heartbeat when you stand
You lose 5% or more of your starting body weight
Your urine concentration goes up a little bit over two or three measurements
• MRI . This test takes detailed pictures your internal organs and soft tissues. The doctor uses it to see if there’s a problem with your hypothalamus or pituitary gland.
• Genetic screening. Your doctor may suggest this test if your family members have had problems with making too much urine.
Complications of Diabetes Insipidus
Diabetes insipidus that isn’t under control can make you more likely to have complications like:
• Dehydration . Diabetes insipidus makes it hard for your body to hold on to water. It’s easy to get dehydrated.
• Electrolyte imbalance. Electrolytes are minerals in your body with a tiny electric charge. When you lose too much water, your electrolyte levels can go up. This might cause:
o A headache
o Feeling tired all the time (fatigue)
o Muscle pain
• Less sleep . Diabetes insipidus can lead to nocturia, a medical name for waking up in the night to pee. The result: a less restful night.
Diabetes Insipidus Treatment
First, your doctor will tell you to drink plenty of fluids. That will replace the constant loss of water. Other treatments depend on which type you have:
• Central diabetes insipidus. You’ll take medications like desmopressin (DDAVP) or vasopressin (Pitressin). It usually comes as a nasal spray. There are also treatments to help these drugs work better.
• Nephrogenic diabetes insipidus can be harder to treat. If it’s caused by a drug, stopping the medicine helps. Other medicines may ease symptoms. These include indomethacin (Indocin) and diuretics like amiloride (Moduretic 5-50) or hydrochlorothiazide (Microzide). Though diuretics typically make you pee more, in this case, they help you make less urine. Sometimes, this condition goes away if you treat the cause.
• Dipsogenic diabetes insipidus. There’s no treatment for this condition. But a few things can ease symptoms. Suck on ice chips or sour candy to help moisten your mouth, boost saliva flow, and lower your desire to drink. If you wake up to pee several times a night, a small dose of desmopressin at bedtime might help.
• Gestational diabetes insipidus. You can take desmopressin while you’re pregnant. Your problems should go away after you have the baby.
Diabetes Insipidus Outlook
Diabetes insipidus doesn’t cause kidney failure or lead to dialysis. Your kidneys still do their main job, which is to filter your blood.
But you will be more prone to dehydration. Make sure you always have something to drink close by, especially when it’s hot or when you exercise.
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