Efficacy of transforaminal epidural magnesium administration when combined with a local anaesthetic and steroid in the management of lower limb radicular pain

Transforaminal lumbar epidural injection of dexmedetomidine versus magnesium sulfate combined with dexamethasone for lower limb radicular pain management: a randomized, clinical trial

BACKGROUND

Epidural steroid injections are frequently used to treat chronic radicular pain of a discogenic origin; however, their efficacy remains limited. Magnesium sulfate and dexmedetomidine are emerging adjuvants with the potential to enhance the effectiveness and prolong the therapeutic duration of steroid injections.

METHODS

In this randomized, double-blind study, 90 patients with unilateral lower limb radiculopathy due to lumbar disc prolapse who did not respond to conservative treatment for 12 weeks were assigned to three groups. The control group received dexamethasone (4 mg), lidocaine 2% (40 mg), and saline. The magnesium group received magnesium sulfate (200 mg) with dexamethasone and lidocaine. The dexmedetomidine group received dexmedetomidine (50 mg), dexamethasone, lidocaine, and saline. Pain intensity was assessed using the visual analog scale at 1 week and 1, 3, and 6 months post-treatment. Secondary outcomes included the Modified Oswestry Disability Index (MODI), analgesic consumption, and procedure-related complications.

RESULTS

Both magnesium and dexmedetomidine significantly reduced pain, disability, and analgesic consumption for up to 3 months. By 6 months, the magnesium group demonstrated significant improvement in pain scores and MODI and a decline in ibuprofen use compared to the control and dexmedetomidine groups.

CONCLUSIONS

Magnesium significantly reduced pain intensity, disability, and analgesic consumption over a 6-month observation period.

Comparison of Transforaminal Magnesium Sulfate with Steroid Injection in the Management of ‎Radicular Back Pain: A Randomized Double-Blinded Clinical Trial Study

BACKGROUND

This study compares the effects of transforaminal magnesium sulfate injection versus other methods for managing radicular back pain, highlighting its potential for improved pain relief and functional outcomes.

METHODS

This randomized, double-blind clinical trial involved 30 patients with radicular back pain who were randomly assigned to receive either transforaminal magnesium sulfate or triamcinolone injection. Primary outcomes were pain intensity and functional disability, assessed using the Visual Analogue Scale (VAS) and Oswestry Disability Index (ODI), respectively. These were evaluated at five time points: Before the injection, 2 weeks, 1 month, 3 months, and 6 months after the injection. Secondary outcomes included drug-related adverse events within the six-month follow-up period.

RESULTS

Baseline characteristics were not significantly different between the two study groups. Compared to pre-injection measures, post-injection pain intensity and functional disability were significantly reduced in both groups at all time points (P < 0.001). At all postoperative evaluations, pain intensity and functional disability were lower in the magnesium sulfate group compared to the steroid group (P < 0.001). No drug-related side effects were recorded in either group.

CONCLUSIONS

For patients with radicular back pain, transforaminal magnesium sulfate injection appears to be an effective and safe alternative to transforaminal steroid injection.

A Comparison of Analgesic Efficacy of Triamcinolone vs Magnesium Sulfate as Adjuvants in Caudal Block in Patients with Low Back Pain: A Double-Blind Randomized Controlled Trial

Background

Chronic low back pain (CLBP) is a common issue among older adults. Radicular pain syndromes are often managed with caudal epidural injections. Our study aimed to compare the effects of triamcinolone and magnesium sulfate, used as adjuvants to local anesthetics in caudal blocks, on pain levels and quality of life in patients with LBP.

Methods

A total of 40 patients undergoing caudal block were randomized to two groups,received 10 mL caudal epidural injection of either injection 9 mL of ropivacaine 0.1% and 1 mL of triamcinolone; 40 mg (Group T, n = 20) or magnesium sulfate; 200 mg (group M, n = 20). Improvements in the pain score measured with the Visual Analog Scale (VAS) and functional ability measured with the Oswestry Disability Index (ODI) were the primary and secondary outcome measures, respectively. Before, one month and three months after the caudl block, the VAS and ODI scores were evaluated.

Results

The VAS and ODI scores did not exhibit a significant difference between the 2 groups at all post-injection time points, except for the VAS score at 3 months, which showed a statistically lower value in group M compared to group T (P = 0.046). However, when comparing within the same group, both groups showed significantly improved VAS and ODI scores at all post-injection time points compared to the pre-injection scores (P < 0.0001).

Conclusions

The addition of magnesium or triamcinolone to a local anesthetic in caudal epidural injections does not result in any discernible difference. However, this combination may lead to improvements in pain levels and quality of life, and these improvements can be sustained for up to 3 months.

Intervention Effect of Lumbar Transforaminal Epidural Block on the Treatment for Low Back Pain with Radicular Pain

Lumbar transforaminal epidural block (LTEB) is a minimally invasive interventional method, and the interventional effect of LTEB on the treatment of low back pain with radicular pain is not yet clear; therefore, a total of 100 patients with low back pain with radicular pain treated in our hospital from January 2021 to December 2021 were included in this study, and they were divided into two groups of 50 each using a digital double-blind method. The control group was treated conservatively, and the study group was treated with LTEB. Patients' pain was assessed using the numerical rating scale (NRS), and the degree of functional impairment was assessed using the Oswestry disability index (ODI). The results of the study showed comparable differences in NRS scores for low back pain, NRS scores for lower extremities, and ODI scores of patients before treatment (t = 0.071, 0.035, 0.007, P > 0.05). After treatment, patients in the control group had a low back pain NRS score (4.00 ± 0.85), lower extremity NRS score (3.87 ± 0.78), ODI score (58.25 ± 2.53), and low back pain NRS score (2.00 ± 0.54), while the study group had a lower extremity NRS score (2.00 ± 0.50) and ODI score (58.25 ± 2.53) that were statistical significance (t = 0.071, 0.035, 24.218, P < 0.001). In conclusion, treatment with LTEB can effectively reduce the pain and improve the functional impairment of patients with low back pain with radicular pain, which is clinically important.