🦵 Sciatica-Specific Epidural Steroid Injection Simulator

Selecting Candidates for Epidural Steroid Injection

Best candidates have subacute radicular pain matching imaging findings.

• 4–12 wk: Ideal symptom window (subacute radiculopathy)
• Required: Imaging correlation (MRI-confirmed nerve root compression)
• Leg > back pain: Response predictor (radicular dominance)
• Active infection: Contraindication (local or systemic)

Selection criteria overview

Short placeholder: matches symptoms, duration, and imaging findings.

Fluoroscopy-Guided Needle Placement

Live imaging confirms accurate needle entry into the epidural space.

• Transforaminal: Approach (or interlaminar route)
• Epidurogram: Contrast check (confirms spread pattern)
• Fluoroscopy: Guidance modality (real-time C-arm imaging)
• Epidural space: Needle target (adjacent to nerve root)

Needle guidance steps

Short placeholder: contrast confirms correct epidural needle position.

Corticosteroid Delivery into the Epidural Space

Steroid solution spreads around the inflamed, compressed nerve root.

• Triamcinolone: Typical agent (or methylprednisolone)
• 1–3 mL: Volume injected (plus local anesthetic)
• Perineural: Spread pattern (around affected root)
• Days: Onset window (to early effect)

Delivery mechanics

Short placeholder: solution bathes root, reducing local inflammation.

Onset of Anti-Inflammatory Effect

Corticosteroid reduces nerve root swelling and ectopic firing.

• Cytokine suppression: Mechanism (reduces local inflammation)
• 2–7 days: Onset (variable by patient)
• ~2–3 weeks: Peak effect (after injection)
• Improves: Nerve conduction (as edema resolves)

Anti-inflammatory pathway

Short placeholder: swelling drops, root irritation gradually eases.

Expected Duration of Pain Relief

Relief typically lasts weeks to months, varying by patient factors.

• 6–12 wk: Median relief (short-to-moderate term)
• Up to 3/yr: Repeat injections (if response fades)
• Uncommon: Long-term cure (adjunct to other care)
• Acute cases: Best responders (shorter symptom duration)

Relief timeline

Short placeholder: duration depends on severity and chronicity.

Short placeholder: repeat injection considered if relief fades early.