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Regional Anesthesia

(Nerve Block)
  • Definition

    Regional anesthesia is a type of anesthesia. It blocks pain to a part of the body without causing sleep.
  • Reasons for Procedure

    Regional anesthesia is used to make the body numb for surgery:
    • It may be used with high-risk surgical patients. It is safer for them than general anesthesia.
    • It has been proven beneficial in trauma, operation-related pain, and short and long term medical disease and pain states.
    • Epidural anesthesia is often used during childbirth to relieve labor pains.
    • It has been shown to help people be mobile sooner after surgery and increases duration of pain relief.
    Anesthesia Injection into Spinal Canal—Epidural
    Epidural Injection
    Copyright © Nucleus Medical Media, Inc.
  • Possible Complications

    Problems from the procedure are rare, but all procedures have some risk. Your doctor will review potential problems, like:
    • Pain and tenderness around the injection site
    • Bruising, infection, or bleeding of the injection site
    • Headache
    • Decrease in blood pressure
    • Nerve damage
    • Medication mistakenly injected into a vein or artery
    • Damage to organs
    Before your procedure, talk to your doctor about ways to manage factors that may increase your risk of complications such as:
  • What to Expect

    Prior to Procedure
    Your doctor will likely do the following:
    • Physical exam
    • Arrange for you to meet with an anesthesiologist, who will also go over your history and do a physical examination
    Leading up to your procedure:
    • Fast the night before if recommended by your doctor.
    • Take medications prescribed by your doctor.
    • Avoid certain medications, if recommended by your doctor.
    • Arrange to have someone drive you to and from the procedure. Also, arrange for help at home after your procedure.
    Description of Procedure
    With regional anesthesia, you may remain awake, but you will usually be given a sedative to help calm you. Prior to administering the anesthesia:
    • Your doctor may set up monitors to track your vital signs.
    • The area to be injected will be cleaned with an antiseptic solution.
    • A local anesthetic may be applied to the skin or injected. This may sting slightly.
    Your anesthesiologist will inject medication near a cluster of nerves. The selected nerves will be the ones that supply the area of your body that requires surgery.
    Types of regional anesthesia include epidural and spinal. Both involve injecting medications in or near the spinal canal.
    Another type of regional anesthesia, a peripheral nerve block, is often used for knee, shoulder, or arm surgery. The anesthesia is injected near clusters of nerves that feed the arms or legs. A cervical nerve block is a type of peripheral nerve block for surgeries in the neck or arm.
    Cervical Nerve Block
    Cervical nerve block
    Copyright © Nucleus Medical Media, Inc.
    After Procedure
    If local anesthetic is used, you will slowly gain sensation and motion again in the area that was numbed. It can take a few hours or longer before your sensation is completely back to normal. If treating for pain, the pain will return in a few hours, and the relief may take up to 2 weeks. Any pain and discomfort after the procedure can be managed with medications.
    How Long Will It Take?
    While the regional anesthesia procedure itself takes several minutes or longer, its effects typically last for 2-6 hours.
    Will It Hurt?
    Depending on whether sedation or local anesthesia is used, you may feel slight pain or tingling with the injection. The anesthetic will prevent you from feeling pain during your surgical procedure. You may feel that your limb may be heavy initially and then light later on.
    Postoperative Care
    Your postoperative care will depend on the nature of your surgery. Most likely, you will receive instructions about limits on your diet and activities.
    Once the anesthesia wears off, sensation will return to the region where pain was blocked. You may have to restrict activities, such as driving, since you may feel numb or drowsy as your anesthetic and sedative wear off.
    Preventing Infection
    During your stay, the hospital staff will take steps to reduce your chance of infection, such as:
    • Washing their hands
    • Wearing gloves or masks
    • Keeping your incisions covered
    There are also steps you can take to reduce your chance of infection, such as:
    • Washing your hands often and reminding visitors and healthcare providers to do the same
    • Reminding your healthcare providers to wear gloves or masks
    • Not allowing others to touch your incision
  • Call Your Doctor

    It is important to monitor your recovery. Alert your doctor to any problems. If any of the following occur, call your doctor:
    • Signs of infection, including fever and chills
    • Redness, swelling, increasing pain, or discharge from the injection site
    • Tingling, numbness, or trouble moving the affected area that lasts longer than expected
    • Pain that you cannot control with the medications you have been given
    • Headache
    • Persistent coughing
    • Shortness of breath or chest pain
    • Lightheadedness
    • Heartbeat abnormalities
    • Funny taste or numbness of the mouth
    • New or worsening symptoms
    If you think you have an emergency, call for medical help right away.

    American Association of Nurse Anesthetists

    American Society of Anesthesiologists


    Canadian Anesthesiologists' Society

    Health Canada


    Anesthesia basics. Nemours Kids Health website. Available at: Updated April 2012. Accessed September 26, 2014.

    Mulroy M, Bernards C, et al. A practical approach to regional anesthesia. Philadelphia, PA: Lippincott Williams & Wilkins; 2008.

    Regional anesthesia for surgery. American Society of Regional Anesthesia and Pain Medicine website. Available at: Accessed September 26, 2014.

    Waldman SD. Interventional Pain Management. Philadelphia, PA:WB Saunders Company; 2001.

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