Intraspinal anesthesia; Subarachnoid anesthesia; Epidural; Peridural anesthesia
Spinal and epidural anesthesia are medicines that numb parts of your body to block pain. They are given through shots in or around the spine.
The doctor who gives you epidural or spinal anesthesia is called an anesthesiologist.
First, the area of your back where the needle is inserted is cleaned with a special solution. The area may also be numbed with a local anesthetic.
You'll likely receive fluids through an intravenous line (IV) in a vein. You may receive medicine through the IV to help you relax or sleep lightly.
For an epidural:
- The doctor injects medicine just outside of the sac of fluid around your spinal cord. This is called the epidural space.
- The medicine numbs, or blocks feeling in a certain part of your body so that you cannot feel pain. The medicine begins to take effect in about 10 to 20 minutes. It works well for longer procedures. Women often have an epidural during childbirth.
- A small tube (catheter) is often left in place. You can receive more medicine through the catheter to help control your pain during or after your procedure.
For a spinal:
- The doctor injects medicine into the fluid in your spinal cord. This is usually done only once, so you will not need to have a catheter placed.
- The medicine begins to take effect right away. It works well for shorter and simpler procedures.
Your pulse, blood pressure and oxygen level in your blood are checked during the procedure. After the procedure, you will have a bandage where the needle was inserted.
Why the Procedure Is Performed
Spinal and epidural anesthesia have fewer side effects and risks than general anesthesia (asleep and pain-free). People usually recover their senses much faster. Sometimes, they have to wait for the anesthetic to wear off so they can walk.
Spinal anesthesia is often used for genital, urinary tract, or lower body procedures.
Epidural anesthesia is often used during labor and delivery, and surgery in the pelvis and legs.
Epidural and spinal anesthesia are often used when:
- The procedure or labor is too painful without any pain medicine.
- The procedure is in the belly, legs, or feet.
- Your body can remain in a comfortable position during your procedure.
- You want fewer systemic side effects and a shorter recovery than you would have from general anesthesia.
Spinal and epidural anesthesia are generally safe. Ask your doctor about these possible complications:
- Allergic reaction to the anesthesia used
- Bleeding around the spinal column (hematoma)
- Difficulty urinating
- Drop in blood pressure
- Infection in your spine (meningitis or abscess)
- Nerve damage
- Seizures (this is rare)
- Severe headache
Before the Procedure
Tell your health care provider:
- If you are or could be pregnant
- What medicines you are taking, including medicines, supplements, or herbs you bought without a prescription
During the days before the procedure:
- Tell your doctor about any allergies or health conditions you have, what medicines you are taking, and what anesthesia or sedation you have had before.
- If your procedure is planned, you may be asked to stop taking aspirin, ibuprofen (Advil, Motrin), warfarin (Coumadin), and any other blood thinners.
- Ask your doctor which medicines you should still take on the day of your procedure.
- Arrange for a responsible adult to drive you to and from the hospital or clinic.
- If you smoke, try to stop. Ask your provider for help quitting.
On the day of the procedure:
- Follow instructions on when to stop eating and drinking.
- Do not drink alcohol the night before and the day of your procedure.
- Take the medicines your doctor told you to take with a small sip of water.
- Follow instructions on when to arrive at the hospital. Be sure to arrive on time.
After the Procedure
After an epidural, the catheter in your back is removed. You lie in bed until you have feeling in your legs and can walk. You may feel sick to your stomach and be dizzy. You may be tired.
After spinal anesthesia, you lie flat in bed for a few hours. This is to keep you from getting a headache. You may feel sick to your stomach and be dizzy. You may be tired.
Most people feel no pain during spinal and epidural anesthesia and recover fully.
Brull R, MacFarlane AJR, Chan VWS. Spinal, epidural, and caudal anesthesia. In: Miller RD, ed. Miller's Anesthesia. 8th ed. Philadelphia, PA: Elsevier Saunders; 2015:chap 56.
Hernandez A, Sherwood ER. Anesthesiology principles, pain management, and conscious sedation. In: Townsend CM Jr, Beauchamp RD, Evers BM, Mattox KL, eds. Sabiston Textbook of Surgery: The Biological Basis of Modern Surgical Practice. 20th ed. Philadelphia, PA: Elsevier; 2017:chap 14.