Interscalene Block

An interscalene block is a type of regional anesthesia used for shoulder and upper-arm surgery. Numbing medication is placed near the nerves that supply the shoulder and arm, so the area is numb during surgery and for a period of time afterward. It is usually given together with general anesthesia.

Because your shoulder and arm are numb, you typically have much less pain for about 12–18 hours after surgery. It can also reduce the amount of general anesthesia and pain medication needed, which may help lower nausea after surgery.

The block is placed at the surgical center shortly before your procedure. You will be given medication to help you relax, and your anesthesiologist will guide you through it. Most patients find it very tolerable.

Your shoulder and arm will feel numb and heavy, and you won't be able to lift or move the arm for about 12–18 hours. Your fingers may feel tingly. Keep your arm protected in your sling, and avoid heat, ice or anything that could injure the arm until normal feeling returns. Start your pain medication as directed before the block wears off.

Some temporary effects are common and go away as the block wears off. These can include a hoarse voice, a droopy eyelid on the same side, or a feeling that you can't take a full deep breath. Serious complications are rare. Your anesthesiologist will review the specific risks with you before you consent.

Most patients having shoulder or upper-arm surgery are good candidates, but not everyone. Tell your care team if you have lung disease (such as COPD or emphysema), take blood thinners, are pregnant, or have had a reaction to local anesthetics. Your anesthesiologist and Dr. Ganjianpour will decide together whether a block is right for you.

Call the office if the numbness lasts longer than your care team told you to expect, or if you have any concerns after you get home. If you have difficulty breathing, chest pain, or other severe symptoms, call 911.