The success rates of epidural steroid injections can vary depending on several factors. While some patients experience significant pain relief,1,2 others may not experience any pain relief from this procedure.3,4 The effects of the injection may be short-term, such as a week, or may continue for a year. Show
Common Factors that May Affect the Success of the InjectionThe efficacy of an epidural depends on many factors, including but not limited to:
The injection may sometimes be used in combination with a comprehensive rehabilitation program to increase the likelihood of longer-term pain relief and return to everyday activities.6 Other factors that may affect the outcome of this treatment include the physician’s skill and experience in administering the injection, the use of guided fluoroscopy, and the patient’s general health. The treatment may also be more effective in treating acute pain (versus chronic symptoms). The success rates of epidural steroid injections for the treatment of a few common conditions are discussed below. advertisement Success Rates for SciaticaSciatica, which is medically known as lumbar radiculopathy, is nerve pain that originates deep in the buttock and travels down to the thigh and/or leg. Sciatica is commonly caused when a herniated disc or narrowing of the bony opening for spinal nerves (foraminal spinal stenosis) compresses a nerve root in the lumbar spine.1 Clinical trial results in the treatment of sciatica pain with epidural steroid injections have the following success rates:
Other conditions such as spinal cysts or ligament thickening that cause spinal nerve compression and radicular nerve pain in the legs may also yield similar results when treated with these injections. In This Article:Success Rates for Axial Low Back PainLocalized lower back pain is typically caused due to inflammatory changes within the spinal soft tissues or lumbar discs.3,10,11 In a study involving 120 participants with axial low back pain, treatment with 4 injections given over a span of 1 year showed more than 50% improvement in pain and functional outcome in 68% of patients.12 Other studies have reported pain relief for 2 years when 6 injections were spaced out and given during this period.13 Success Rates for Neurogenic ClaudicationNeurogenic claudication, characterized by pain felt in both legs while walking variable distances, is usually treated with bilateral transforaminal epidural steroid injections (given on both sides of the spine). A study involving 22 participants showed 30% of patients experiencing pain relief at 1 month, 53% at 3 months, and 44% at 6 months after receiving bilateral injections.14 Other studies have reported pain relief for 2 years when 6 injections were spaced out and given during this period.4 advertisement Guidelines for Number and Frequency of Epidural Steroid InjectionsResearch indicates that an additional injection may be given if the following criteria are met3:
Common guidelines recommend that if more than 4 epidural steroid injections are needed in 1 year, the underlying condition must be managed by other treatment methods.3 To improve the overall outcome of the procedure and reduce the risk of side effects, using a blunt needle, live fluoroscopy, and administering a small test dose initially may be helpful.15 Combining Epidural Steroid Injection with Physical TherapyA guided physical therapy program may be combined with the epidural steroid injection treatment for an added benefit. Studies suggest that combining physical therapy with the injection treatment of herniated discs may improve the quality of pain relief and overall satisfaction in the patient.16 Injection treatment of lower back conditions such as spinal stenosis may benefit from improved quality of life and overall health when combined with physical therapy; with no direct effect on pain-relief values.17,18 See Physical Therapy and Exercise for Sciatica References
What is the success rate of epidural steroid injections?An analysis of several large clinical trials indicated that 40% to 80% of patients experienced over 50% improvement in sciatica pain and functional outcome from 3 months up to 1 year when 1 to 4 injections were given in that year.
How long does an epidural injection for back pain last?Another variable is how the injection is delivered. However, as a general rule, a patient can expect the pain relief to last anywhere from one to three months. In some patients, the pain relief may last as long as twelve months or even longer.
What is the next step if epidural injections don't work?An alternative to ESIs, or an option to consider if injections are no longer providing relief, is the mild® Procedure. mild® stands for minimally invasive lumbar decompression. It's a short outpatient procedure that relieves pressure on the spine through an incision smaller than the size of a baby aspirin (5.1 mm).
What are the benefits of epidural steroid injection?Epidural steroid injections (ESIs) deliver anti-inflammatory medication into the epidural space of the spine in order to soothe inflammation and pain. This method helps relieve inflammation that originates in the spine and radiates to the lower back, hips, or leg.
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