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How is dehydration diagnosed?

To diagnose dehydration, your healthcare provider will take a detailed health history from you. This includes information on other health conditions you have that may lead to dehydration. Healthcare providers may also ask about past surgeries, or the medicines that you use or have used. You may need any of the following:

  • Physical exam: Your healthcare provider will do a complete check-up of your body to look for problems or signs of infection.
  • Blood tests: You may need blood taken to give healthcare providers information about how your body is working. The blood may be taken from your hand, arm or IV.
  • BUN and creatinine: Healthcare providers will measure the levels of blood urea nitrogen (BUN) and creatinine in your body. This will tell healthcare providers if too much water is being lost or retained in your body.
  • Tilt table test: This test checks to see what happens to your heartbeat and your blood pressure when you change positions.
  • Urinalysis: This test that looks at your urine to find out how your kidneys are working. Your healthcare provider will use this test to look for white blood cells, protein, sugar, blood and bacteria that are not normally in urine. Your healthcare provider may also check the amount of water in your body by checking the concentration of your urine.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.