When patient has had CVA nenepuncture shold be avoided on affected side why?

When a patient has had a cerebrovascular accident (CVA), or stroke, lumbar puncture should be avoided on the affected side due to the risk of potential complications such as herniation. The brain may have shifted or swollen, and performing a lumbar puncture could exacerbate these conditions by altering intracranial pressure dynamics. Additionally, there may be increased risk of bleeding or infection in the area where the neurological function is compromised. Therefore, the procedure is typically avoided on the side of the CVA to ensure patient safety.