what does it mean when lab work shows dehydration
Tests and diagnosis. Your doctor can often diagnose dehydration on the basis of physical signs and symptoms such as little or no urination, sunken eyes, and skin that lacks its normal elasticity and resilience when pinched. Blood tests. 2  Blood samples may be used to check for a number of factors, such as the levels of your electrolytes â especially sodium and potassium â and how well your kidneys are working. 3  Urinalysis.