Immediate pain response to interlaminar lumbar epidural steroid administration: response characteristics and effects of anesthetic concentration

Anaesthetic and corticosteroid response immediately following epidural injection in patients with MRI confirmed lumbar disc herniation

OBJECTIVES

To describe a rapid, community-based assessment, referral and management system for acute symptomatic LDH. To identify and describe specific local anaesthetic and corticosteroid patterns of pain intensity change during the first week post-epidural injection.

SETTING

Private practice, specialist physiotherapy clinic, community-based radiology facility.

DESIGN

Cohort study.

METHOD

Consecutive patients with clinical and MRI diagnosis of acute LDH causing radicular pain and/or radiculopathy were referred for lumbar epidural injection. Pre- and post-procedure measures of back, buttock and lower limb pain intensity were acquired at 1,2,4,6 h, and at 1 week. Analysis of changes in back, buttock and lower limb pain intensity to identify different patterns that may influence clinical management.

RESULTS

A detailed clinical assessment, MRI and epidural steroid injection was completed for 51 patients. Pain intensity change patterns were highly heterogeneous. Three broadly different pain intensity response patterns: "Steroid Responsive" (41%), "Mechanical" (37%) and Unconfirmed Diagnosis (22%), were identified. Psychosocial factors did not influence tendency of patients to follow one clinical pathway versus another.

CONCLUSIONS

Radicular pain associated with LDH responds to epidural injection in patterns that may be described as "steroid responsive" or "mechanical". LDH is not confirmed as the cause of pain in the remainder. Immediate post procedure anaesthetic and one week corticosteroid responses can guide management pathway and identify a subgroup requiring further diagnostic workup.

Evaluation of lung function and clinical features of interlaminar cervical epidural steroid injections: a randomized controlled trial

OBJECTIVE

Interlaminar cervical epidural steroid injections (ICESIs) are commonly used to treat axial neck pain and cervical radicular pain. However, local anesthetics can spread to and block the phrenic nerve and upper segments of the thoracic spinal cord where the sympathetic innervation of the lungs emerges. Therefore, changes in lung function may occur following ICESIs.

METHODS

The primary outcome measure was the pulmonary function test (PFT) result 30 minutes before and after ICESI with ropivacaine (0.1875% or 0.25%). The secondary outcome measure was the comparison of the pain scores and functional disability between the two concentrations of ropivacaine 4 weeks after the ICESIs.

RESULTS

Fifty patients were randomly assigned to either the R1 (0.1875% ropivacaine) or R2 (0.25% ropivacaine) group. No significant difference was observed between the pre-ICESI and 30-minute post-ICESI PFT results within each group, and no difference was observed between the two groups. After 4 weeks of treatment, both groups showed a significant decrease in pain scores and functional disability; however, no significant differences were observed between the two groups.

CONCLUSIONS

This study showed no significant change in lung function after ICESIs in either group and no local anesthetic concentration-based difference in the clinical efficacy of the ICESIs.

Assessing the impact of adding bupivacaine on immediate and delayed post-procedure pain scores in interlaminar epidural steroid injections

OBJECTIVE

A local anesthetic is frequently administered as part of a lumbar epidural steroid injection (LESI); however, there is a rare potential for this to result in transient paralysis if administered incorrectly. The purpose of this retrospective study is to determine if the addition of bupivacaine significantly improves patient-reported pain scores.

MATERIALS AND METHODS

This retrospective review includes patients undergoing LESI over an approximately 1 year time span. Pre-procedure, immediate post-procedure, and 1-week integer scaled pain scores were recorded. Ordinal regression was used to compare the distributions of the aggregated ordinal pain score categories between bupivacaine- and non-bupivacaine-injected patients.

RESULTS

Two hundred fifty-eight patients met the inclusion criteria (126F:132 M, mean age 64.7 years) with 164 receiving bupivacaine and steroids and 94 receiving steroids alone. The relative frequency distributions for pre-injection pain did not differ between the bupivacaine patients and the non-bupivacaine patients (p = 0.114). Similarly, the relative frequency distributions for immediate and 1-week post-procedure pain did not differ between the bupivacaine patients and the non-bupivacaine patients (p = 0.293 at immediate time point and p = 0.306 at 1-week time point). Odds ratios comparing pain severity change between the bupivacaine and non-bupivacaine patients also were not significantly different at either the immediate post-procedure (p = 0.769) or 1-week (p = 0.203) time points.

CONCLUSION

The lack of a significant downward shift in the bupivacaine patients' post-procedure pain scores compared to the non-bupivacaine patients' post-procedure pain scores raises doubts about bupivacaine's utility as a standard component of a lumbar epidural injection.

Immediate Pain Relief at Time of Corticosteroid Injection for Idiopathic Adhesive Capsulitis as a Predictor of Eventual Outcomes

Background

Corticosteroid injection and physical therapy remain the mainstay of treatment for idiopathic adhesive capsulitis of the shoulder; however, a certain percentage of patients will not improve using these interventions and will require manipulation under anesthesia (MUA) and/or lysis of adhesions (LOA).

Purpose

To evaluate whether the immediate pain reduction after fluoroscopic-guided, mixed anesthetic-corticosteroid injection for idiopathic adhesive capsulitis is related to the eventual need for LOA/MUA or a repeat glenohumeral steroid injection.

Study Design

Case-control study; Level of evidence, 3.

Methods

This single-institution study involved patients undergoing fluoroscopic glenohumeral corticosteroid injection for a diagnosis of idiopathic adhesive capsulitis between 2010 and 2017. Included were patients with a minimum of 1-year postinjection follow-up and visual analog scale (VAS) pain scores from immediately before and after the injection. The primary analysis was the relationship between patients with an immediate change in VAS score after injection and those who underwent LOA/MUA. A repeat glenohumeral injection was also evaluated as an outcome. Receiver operator characteristic curves and a multivariate binomial logistic regression analysis were performed.

Results

Overall, 739 shoulders in 728 patients (mean age, 52.6 years; 68% women) were included, of which 38 (5.1%) underwent LOA/MUA and 209 (28%) underwent repeat injections. The immediate change in the VAS score was not significantly associated with the eventual need for LOA/MUA. Preinjection VAS and immediate postinjection VAS scores were not significant predictors of eventual LOA/MUA or subsequent injection. For all 3 predictors, the area under the receiver operator characteristic curve classified them as extremely poor discriminators.

Conclusion

The immediate pain response to a fluoroscopic-guided glenohumeral injection for idiopathic shoulder adhesive capsulitis was not predictive of the eventual need for LOA/MUA or subsequent injection. Patients can be counseled that even if their initial pain response to an injection is poor, they still have an excellent chance of avoiding surgery, as the overall rate of LOA/MUA was low (5.1%).

The Outcome of Epidural Injections in Lumbar Radiculopathy Is Not Dependent on the Presence of Disc Herniation on Magnetic Resonance Imaging: Assessment of Short-Term and Long-Term Efficacy

OBJECTIVE

Lumbar radiculopathy is a condition with major physical, social, and economic consequences. Despite its favorable prognosis, the burden can be significant. In this study, we aimed to determine the value of magnetic resonance imaging (MRI) and the efficacy of transforaminal epidural injections (TEIs) in patients with lumbar radiculopathy secondary to lumbar disc herniation (LDH) and other causes (non-LDH).

METHODS

Patients with lumbar radiculopathy were reviewed for radiologic diagnosis based on MRI. For patients receiving TEI therapy, response after 6-8 weeks (short-term) and 16 weeks (long-term), number of injections, subsequent surgery, and patient outcome were evaluated. Treatment response was assessed by patient-reported symptom relief and numeric rating scale pain scores.

RESULTS

Overall, 66% of MRI examinations showed a clinically relevant LDH. A total of 486 of 1824 patients received TEI, of whom one third did not show LDH. Of patients, 70% reported a short-term effect with significant pain reduction and 44% reported a long-term effect. No significant differences were observed between the LDH and non-LDH groups. Of patients, 59% required multiple injections and reported similar efficacy compared with patients treated with a single injection.

CONCLUSIONS

A considerable part of MRI examinations in patients with lumbar radiculopathy do not show a clinically relevant LDH. Regardless of the radiologic diagnosis, most patients treated with TEI benefit in both the short-term and the long-term after a single-injection or multiple-injection regime. Subsequent injections are advisable if the effect from the first injection is unsatisfactory or wears off. MRI examination before TEI therapy may be redundant, which allows for expedition of this treatment.

The efficacy of interlaminar epidural steroid administration in multilevel intervertebral disc disease with chronic low back pain: a randomized, blinded, prospective study

BACKGROUND CONTEXT

Epidural steroid injection is commonly used in patients with chronic low back pain. Applying a mixture of a local anesthetic (LA) and steroid using the interlaminar (IL), transforaminal, and caudal techniques is a preferred approach.

PURPOSE

The present study aims to investigate the efficacy of interlaminar epidural steroid administration in patients with multilevel lumbar disc pathology (LDP) and to assess the possible correlation of the procedure's success with age and body mass index (BMI).

STUDY DESIGN

A randomized controlled trial was performed.

PATIENT SAMPLE

We administered interlaminar epidural steroid to a total of 98 patients with multilevel LDP.

OUTCOME MEASURES

The visual analog scale (VAS) and Oswestry Disability Index (ODI) scoring were performed on the study population at pretreatment (PRT), posttreatment, and 1, 3, 6, and 12 PRT months. A possible correlation of BMI and age with the procedure success was evaluated.

METHODS

The LA group (Group L, n=50) received 10 mL 0.25% bupivacaine, whereas the steroid+LA group (Group S, n=48) received 10 mL 0.25% bupivacaine+40 mg methylprednisolone at L4-L5 intervertebral space in prone position under the guidance of C-arm fluoroscopy.

RESULTS

There was no statistical difference in the PRT VAS and ODI scores between the groups (p<.05), whereas the VAS and ODI scores at 1, 3, 6, and 12 posttreatment months were higher in Group L, compared with Group S (p<.05). Age and BMI were not found to be related with the success of the procedure.

CONCLUSIONS

Our study results showed that the VAS and ODI scores were lower in patients with multilevel LDP receiving steroid, following the administration of IL epidural injection. However, further studies are required to establish a robust conclusion on the dispersion of IL epidural injections in the epidural area and the dose of steroid.

Safety of Epidural Corticosteroid Injections

BACKGROUND AND OBJECTIVE

Epidural corticosteroid injections (ESIs) have been used for several decades and now represent the most common intervention performed for the management of back pain with a radicular component. However, several reports have presented devastating complications and adverse effects, which fuelled concerns over the risk versus clinical effectiveness. The authors offer a comprehensive review of the available literature and analyse the data derived from studies and case reports.

METHODS

Studies were identified by searching PubMed MEDLINE, Ovid MEDLINE, EMBASE, Scopus, Google Scholar and the Cochrane Library to retrieve all available relevant articles. Publications from the last 20 years (September 1994 to September 2014) were considered for further analysis. Studies selected were English-language original articles publishing results on complications related to the technique used for cervical and lumbar ESIs. The studies had to specify the approach used for injection. All studies that did not fulfil these eligibility criteria were excluded from further analysis.

RESULTS

Overall, the available literature supports the view that serious complications following injections of corticosteroid suspensions into the cervical and lumbar epidural space are uncommon, but if they occur they can be devastating.

CONCLUSIONS

The true incidence of such complications remains unclear. Direct vascular injury and/or administration of injectates intra-arterially represent a major concern and could account for the vast majority of the adverse events reported. Accurate placement of the needle, use of a non-particulate corticosteroid, live fluoroscopy, digital subtraction angiography, and familiarisation of the operator with contrast patterns on fluoroscopy should minimise these risks. The available literature has several limitations including incomplete documentation, unreported data and inherent bias. Large registries and well-structured observational studies are needed to determine the true incidence of adverse events and address the safety concerns.

Paravertebral spinal injection for the treatment of patients with degenerative facet osteoarthropathy: Evidence of motor performance improvements based on objective assessments

BACKGROUND

This study examined short- and long-term improvements in motor performance, quantified using wearable sensors, in response to facet spine injection in degenerative facet osteoarthropathy patients.

METHODS

Adults with confirmed degenerative facet osteoarthropathy were recruited and were treated with medial or intermediate branch block injection. Self-report pain, health condition, and disability (Oswestry), as well as objective motor performance measures (gait, balance, and timed-up-and-go) were obtained in five sessions: pre-surgery (baseline), immediately after the injection, one-month, three-month, and 12-month follow-ups. Baseline motor performance parameters were compared with 10 healthy controls.

FINDINGS

Thirty patients (age=50 (14) years) and 10 controls (age=46 (15) years) were recruited. All motor performance parameters were significantly different between groups. Results showed that average pain and Oswestry scores improved by 51% and 24%, respectively among patients, only one month after injection. Similarly, improvement in motor performance was most noticeable in one-month post-injection measurements; most improvements were observed in gait speed (14% normal walking, P<0.02), hip sway within balance tests (63% eyes-open P<0.01), and turning velocity within the timed-up-and-go test (28%, P<0.02). Better baseline motor performance led to better outcomes in terms of pain relief; baseline turning velocity was 18% faster among the responsive compared to the non-responsive patients.

INTERPRETATIONS

Spinal injection can temporarily (one to three months) improve motor performance in degenerative facet osteoarthropathy patients. Successful pain relief in response to treatment is independent of demographic characteristics and initial pain but dependent on baseline motor performance. Immediate self-reported pain relief is unrelated to magnitude of gradual improvement in motor performance.

Epidural steroid injections for radicular lumbosacral pain: a systematic review

Most clinical guidelines do not recommend routine use of epidural steroid injections for the management of chronic low back pain. However, many clinicians do not adhere to these guidelines. This comprehensive evidence overview concluded that off-label epidural steroid injections provide small short-term but not long- term leg-pain relief and improvement in function; injection of steroids is no more effective than injection of local anesthetics alone; post-procedural complications are uncommon, but the risk of contamination and serious infections is very high. The evidence does not support routine use of off-label epidural steroid injections in adults with benign radicular lumbosacral pain.