Peripheral Nerve Blocks for Anesthesia

Search Knowledgebase

Topic Contents

Peripheral Nerve Blocks for Anesthesia

Topic Overview

Peripheral nerve blocks are a type of regional anesthesia. The anesthetic is injected near a specific nerve or bundle of nerves to block sensations of pain from a specific area of the body.

Nerve blocks usually last longer than local anesthesia. They are most commonly used for surgery on the arms and hands, the legs and feet, or the face.

Proper positioning of the needle during a nerve block may involve touching the nerve to be blocked with the tip of the needle. When this occurs, you may experience a sharp sensation like an electrical shock in the part of the body supplied by the nerve. Be sure to let your anesthetist know if you feel such a sensation.

Other medications are often given with nerve blocks to make you relaxed or sleepy (sedatives) or to reduce pain. These are given through a vein (intravenously, IV).

People are carefully monitored during the procedure because the anesthetics used for regional nerve blocks may affect the central nervous system, cardiovascular system, and respiratory system (airway and lungs) and may significantly affect breathing, heartbeat, and other vital functions.

Nerve blocks may be most useful when the procedure:

  • Can be confined to a specific region of the body that can be anesthetized with a nerve block.
  • Involves large surface areas of the body where injection with a large volume of local anesthetic might cause side effects that affect the whole body.
  • Involves an area of the body where injection of a local anesthetic would cause distortions that might cause problems with the surgery, such as the face.
  • Can be performed in a relatively short time. Nerve blocks may not last long enough for some procedures.

Related Information

Credits

By Healthwise Staff
Primary Medical Reviewer Anne C. Poinier, MD - Internal Medicine
Specialist Medical Reviewer John M. Freedman, MD, MD - Anesthesiology
Specialist Medical Reviewer C. Dale Mercer, MD, FRCSC, FACS - General Surgery
Last Revised April 14, 2010

This information does not replace the advice of a doctor. Healthwise, Incorporated disclaims any warranty or liability for your use of this information.