1. What is it? Any common name for this procedure?
A Stellate Ganglion Block (SGB) is a minimally invasive procedure where a local anesthetic is injected into a bundle of sympathetic nerves in the neck called the stellate ganglion. These star-shaped nerves are located on either side of the voice box and are part of the autonomic nervous system, which controls "involuntary" functions like blood flow, sweating, and heart rate.
By numbing these nerves, the block interrupts abnormal pain signals traveling to the head, neck, arms, and upper chest.
Common Names:
- Stellate Block
- Sympathetic Nerve Block (Cervical)
- SGB
2. Common Symptoms / Indications for this Procedure
Patients typically seek this procedure when they experience chronic pain or circulation issues in the upper body that have not responded to standard treatments. Key indications include:
- Burning or "Electric" Pain: Intense, persistent pain in the arms, hands, neck, or face.
- Temperature Sensitivity: One hand or arm feeling significantly colder or warmer than the other.
- Skin Changes: The skin on your arm or hand appearing shiny, thin, or turning blue/purple.
- Extreme Sensitivity (Allodynia): Pain triggered by a light touch, breeze, or clothing against the skin.
- Excessive Sweating (Hyperhidrosis): Uncontrollable sweating, usually in the hands or face.
- Severe Headaches: Specifically cluster headaches that occur in intense cycles.
- Emotional Hyperarousal: Used off-label for severe PTSD symptoms like constant "fight-or-flight" responses or anxiety.
3. List of Associated Diseases
The SGB is used to treat a wide variety of neurological, vascular, and even psychological conditions:
- Complex Regional Pain Syndrome (CRPS) Types I and II: Formerly known as Reflex Sympathetic Dystrophy (RSD).
- Phantom Limb Pain: Chronic pain following the amputation of an arm.
- Postherpetic Neuralgia: Persistent nerve pain following a shingles infection on the face or arm.
- Raynaud’s Disease: A condition that causes severe coldness and numbness in the hands.
- Cluster Headaches: Excruciating headaches that occur in clusters or cycles.
- Post-Traumatic Stress Disorder (PTSD): Increasingly used off-label to "reset" the sympathetic nervous system.
- Peripheral Vascular Disease (PVD): To improve circulation in the upper extremities.
- Ménière’s Disease: In some cases, to help manage severe dizziness and tinnitus.
4. List of Screening Tests for this Procedure
Before performing an SGB, doctors must ensure the procedure is safe and targeted correctly:
- Imaging (Ultrasound or Fluoroscopy): High-resolution ultrasound is the "gold standard" for real-time needle guidance to avoid hitting the carotid artery or thyroid.
- MRI or CT Scan of the Neck: To visualize the anatomy and ensure no tumors or major distortions exist in the neck.
- Coagulation Profile (PT/INR): Essential blood tests to ensure your blood clots normally, as the neck is a highly vascular area.
- Color Doppler Ultrasound: Specifically used during the procedure to identify and avoid the internal jugular vein and carotid artery.
- Diagnostic Trial: A temporary injection of numbing medicine; if your pain disappears for a few hours, it confirms the sympathetic nerves are the source.
5. Am I eligible for this procedure?
Eligibility is primarily based on clinical need and the failure of conservative therapies.
You are a candidate if:
- You have chronic pain or circulation issues in the upper body that have lasted more than 3 months and failed physical therapy or medications.
- You have "sympathetically maintained pain" (confirmed by the skin becoming warm after a test block).
You are NOT eligible if (Contraindications):
- Active Infection: Near the injection site or a systemic fever.
- Recent Myocardial Infarction: A heart attack within the last several months.
- Severe Bleeding Disorders: Or an inability to temporarily stop blood-thinning medications.
- Glaucoma: Due to the risk of increased eye pressure.
- Pre-existing Nerve Palsy: On the opposite side of the neck, which could lead to breathing issues if both sides are affected.
6. Pre and Post Care
Pre-Care (Preparation):
- Medication Adjustment: You must stop blood thinners (Aspirin, Warfarin, Plavix) for several days as directed by your physician to prevent neck hematomas.
- Fasting: You may be asked to avoid food or drink for 6 hours if you are receiving IV sedation.
- Arranging a Ride: You must have a driver, as the injection can cause temporary blurred vision or dizziness.
Post-Care (Recovery):
- The "Horner’s Sign": Do not be alarmed if your eyelid droops, your eye looks red, or your nose feels "stuffy" on the side of the injection. This is a normal sign that the block worked and usually disappears within 4–8 hours.
- Swallowing Precautions: You may feel a "lump in your throat" or have a hoarse voice. Avoid eating or drinking until you can swallow normally (usually within a few hours).
- Activity: Rest for the remainder of the day. You can typically return to work and light activity the following day.
- Monitor Relief: Keep a "pain diary" for the first 6 hours to record how much relief you experience.
7. Days Required for Hospitalization
The Stellate Ganglion Block is an outpatient procedure.
- Procedure Time: Typically 15 to 30 minutes.
- Observation Time: 30 to 60 minutes to check for immediate side effects like blood pressure changes.
- Hospitalization: 0 Days.
Disclaimer: As per doctor’s advice, the duration of relief varies; some patients need a series of 2 to 4 injections to achieve long-term benefits.
8. Benefits of this Procedure
- Effective Pain Relief: Significant reduction in pain for conditions like CRPS and phantom limb pain.
- Circulation Improvement: Warms cold extremities and helps heal ulcers associated with Raynaud’s or Scleroderma.
- Nonsurgical Approach: Provides a minimally invasive option for chronic conditions, avoiding major surgery.
- Mental Health Support: Can provide a "calm" window for PTSD patients, making traditional talk therapy more effective.
Reduced Medication Dependency: Allows many patients to lower their intake of neuropathic medications or opioids.
