What laboratory tests are used for stroke diagnosis?

In stroke diagnosis, you will need blood and urine tests to rule out conditions that sometimes produce stroke-like symptoms, such as an infection or low blood sugar. Later, the physician might order more lab work to assess cardiovascular risk factors, such as elevated cholesterol or clotting problems.

Another lab test, known as a cerebrospinal fluid (CSF) analysis, involves taking a sample of cerebrospinal fluid to test for traces of blood, which could signal a subarachnoid hemorrhage or indicate a brain tumor or infection. To obtain the sample, the physician inserts a needle into the spinal canal and withdraws a sample to send to the lab.

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