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Ctguidedtspinenerveblock

Published: August 9, 2026Updated: August 16, 2026

A procedure using CT scan to guide anesthetic injection to nerves in the thoracic spine for pain management.

Quick summary

{"Uses CT imaging to precisely locate nerves in the thoracic spine","Injects anesthetic to block pain signals from the chest/upper back","Helps diagnose source of chest or back pain","Provides temporary pain relief for chronic conditions","Performed by a pain specialist or radiologist"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
70922-0
Short code
CT-THR-NB
Synonyms
CT Guided T-spine Nerve block
Category
cardiac
Sample
serum
Container
N/A - No specimen collected
Units
N/A
Ref low
3.5
Ref high
5
Critical range
2.5 N/A – 6.5 N/A
Fasting
false
Population
adult
Sex
all
Age range
≥ 18 years
Method
CT-guided percutaneous nerve block injection
CPT
64490
SNOMED
274865004
Specimen volume
N/A - No specimen collected
Stability
N/A - No specimen collected
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
1–4 hours
Order
routine

What is this test?

CT-Guided Thoracic Nerve Block is a minimally invasive procedure that uses computed tomography (CT) imaging to help doctors precisely inject anesthetic medication near specific nerves in the thoracic spine (upper and middle back). This procedure is primarily used to manage chronic pain in the chest, upper back, or abdomen that originates from the spinal nerves.

How is the procedure performed?

During the procedure, you will lie on a CT scanning table. The doctor will use CT images to identify the exact location of the targeted nerves in your thoracic spine. A thin needle will then be carefully inserted through your skin, guided by the CT images, to reach the precise nerve area. Local anesthetic and sometimes anti-inflammatory medication are injected to numb the nerve and reduce inflammation. The procedure typically takes 30-60 minutes.

How should I prepare?

Before the procedure, inform your doctor about all medications you are taking, especially blood thinners. You may need to stop certain medications temporarily. You should also tell your doctor if you have any allergies, especially to local anesthetics or contrast dye. Wear comfortable, loose-fitting clothing on the day of the procedure. You may need to fast for a few hours before the procedure if sedation is planned.

What happens after the procedure?

After the procedure, you will be monitored for a short time to ensure there are no immediate complications. You may experience temporary numbness or weakness in the treated area. Pain relief may be immediate or may take a few days to fully take effect. The duration of pain relief varies from person to person and can last from weeks to months. You should arrange for someone to drive you home after the procedure.

Reference range

Adult: 3.5-5.0 mmol/LN/A

Specimen: serum

Patient should have recent CT scan available for review. Informed consent required. Verify allergy to contrast if used. Discontinue anticoagulants as per physician orders. Patient should fast 4-6 hours prior to procedure. Have emergency resuscitation equipment available.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Frequently asked questions

Is CT-guided nerve block painful?
You may feel some discomfort during the needle insertion, but the area is numbed with local anesthetic. Most patients report minimal pain during the procedure. You may experience soreness at the injection site for a few days afterward.
How long does the pain relief last?
The duration of pain relief varies significantly among patients. Some people experience relief for several weeks, while others may benefit for several months. The procedure can be repeated if needed.
What are the risks of this procedure?
Risks are generally low but may include infection, bleeding, nerve damage, pneumothorax (lung puncture), or allergic reaction to the medication. Serious complications are rare. Your doctor will discuss the specific risks with you before the procedure.
Will I be awake during the procedure?
Yes, typically you remain awake during the procedure. Local anesthetic is used to numb the area. Depending on your situation and preference, your doctor may offer sedation to help you relax.
How soon can I resume normal activities?
You should rest for the remainder of the day after the procedure. Most patients can return to light activities the next day and resume full normal activities within 1-2 days, unless otherwise instructed by your doctor.
  1. 1
    Radiological Society of North America (RSNA)Source
  2. 2
    American Society of Interventional Pain PhysiciansSource

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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy