It is important to stay completely still while the needle is being inserted. You may feel stinging or discomfort during this process. If no CSF comes out, the doctor must reposition the needle. If the doctor is successful, CSF will leak out into the needle. The doctor inserts the needle where CSF is likely accessible. Cleaning the area with an antiseptic solution prepares the area and reduces the number of bacteria that may cause infection.Ī local anesthetic is used to freeze the area before another needle is inserted for the test. The doctor looks at your spinal column, then marks where a needle will be inserted into your spine. Your doctor may ask you to take another position however, this is the most common position for the test. You will lie down (on your side) on an examination table or hospital bed and draw your knees up to your chest. Then you will be asked to undress either partially or fully and put on a hospital gown. Be sure your doctor understands all your concerns.īefore the test starts, you may be asked to empty your bladder. Take the time to be sure you understand all the risks of complications and side effects as well as any precautions you or your doctor can take to avoid them. If you are concerned about any symptoms following this test, speak to your doctor. Other problems related to changes in pressure inside the spinal canal and brain may occur. This type of leak may close on its own with rest, or with an injection of your own blood that will seal the leaking area. See your doctor immediately if this happens. However, a headache lasting more than 1 or 2 days after the test may be a sign that CSF is leaking out of your spinal canal. Headache tends to resolve on its own without any treatment. Up to 25% of people will develop a headache after the test. allergic reactions to the anesthesia (the medication used to numb the area where the needle is inserted).Although a spinal tap is generally considered safe, it does have some risk of side effects or complications.
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