Master the diagnosis and management of lumbar disc herniation, the most common cause of sciatic nerve root compression. Understand the critical difference between traversing and exiting nerve rootsand learn exactly when to refer for a microdiscectomy. ⏱ Chapters 0:00 Intro 0:22 Mechanism 0:47 Essentials 1:23 Classification 1:55 Imaging 2:24 Staging 2:59 Algorithm 3:34 Numbers 4:09 Clinical reasoning — Manage 4:47 Clinical reasoning — Pearls This OrthoVellum masterclass provides a comprehensive, in-depth breakdown of lumbar disc herniation pathophysiology, NASS nomenclatureand clinical-radiological correlation. We explore why 90% of herniations resolve spontaneously through macrophage-mediated resorption, decode the anatomy of nerve root compression zonesand outline the exact surgical indications for urgent decompression versus elective microdiscectomy. 🦴 IN THIS VIDEO YOU'LL LEARN • How to distinguish radicular leg pain from mechanical back pain using dermatomal mapping and the straight leg raise test • The anatomical reason why paracentral herniations compress the traversing nerve root while far lateral herniations compress the exiting root • How to apply the North American Spine Society (NASS) nomenclature to differentiate between disc protrusion, extrusionand sequestration • Why large sequestered disc fragments often have a better prognosis for spontaneous inflammatory resorption than contained protrusions • The critical importance of clinical-radiological correlation and the 30% rule of asymptomatic disc bulges in adults • Clear criteria for initiating specialist referral and MRI imaging for persistent radiculopathy • The specific red flags requiring urgent surgical decompression, including progressive motor deficits and cauda equina syndrome • How transforaminal epidural steroid injections provide temporary chemical modulation for inflamed nerve roots • The fundamental steps and rationale behind microdiscectomy, including preserving the disc space to maintain spinal mechanics ⏱️ CHAPTERS 📌 KEY TAKEAWAYS ✔️ Leg pain significantly worse than back pain is the hallmark of lumbar disc herniation; pure back pain alone is not radicular. ✔️ 90% of acute lumbar disc herniations resolve with conservative care within 6 weeks. ✔️ Never operate on imaging alone: up to 30% of asymptomatic adults have disc bulges on MRI. ✔️ Paracentral L4-L5 disc herniations compress the traversing L5 nerve root in the lateral recess. ✔️ Cauda equina syndrome with saddle anesthesia and bowel/bladder dysfunction requires emergency decompression within 24-48 hours. 👩⚕️ WHO THIS IS FOR This video is designed for orthopaedic trainees, medical studentsand junior doctors learning to manage spinal pathology, as well as physiotherapists and curious patients seeking a comprehensive, medically accurate understanding of lumbar disc herniation and sciatica. 📚 RELATED TOPICS: Cauda Equina Syndrome Diagnosis and Management · Lumbar Spine MRI Interpretation for Radiculopathy · Microdiscectomy Surgical Technique and Outcomes · NASS Classification of Disc Pathology · Straight Leg Raise Test and Crossed Straight Leg Raise · Degenerative Lumbar Spinal Stenosis 🔗 More free orthopaedic teaching at Orthovellum.com — subscribe for weekly videos. 🎨 CREDITS • Original Orthovellum production. ⚠️ DISCLAIMER: Educational only — not individual medical advice. Always consult a qualified clinician for diagnosis and treatment. #orthopaedics #lumbarherniation #sciatica #spinesurgery #microdiscectomy #radiculopathy #orthovellum #medicaleducation #spine #discherniation #neurosurgery #caudaequina #orthoteaching #lowerbackpain #nerverootcompression