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General Orthopaedics & Spine Care

Endoscopic Spine Surgery (PELD/ULBD): Keyhole Stenosis Decompression and Interlaminar Techniques

10 min read
Sep 5, 2026
Spica Healthcare Clinical & Surgical Protocol Illustration #110

Clinical Summary & Key Takeaways

A state-of-the-art orthopaedic spine surgery guide detailing Percutaneous Endoscopic Lumbar Discectomy (PELD) and Unilateral Biportal Endoscopy (UBE), comparing transforaminal and interlaminar approaches for lumbar canal stenosis and disc prolapse with zero bone destruction.

CRITICAL CLINICAL RED FLAG: Sudden onset of saddle anesthesia (numbness in the groin/perineal region), loss of bowel or bladder control, or progressive foot drop (loss of ankle dorsiflexion) indicates Cauda Equina Syndrome and requires emergency decompressive surgery within 24 hours.

1. The Evolution from Open Laminectomy to Full Endoscopy

Lumbar disc herniation and degenerative canal stenosis cause severe radiculopathy (sciatica) and neurogenic claudication. Traditional open microdiscectomy requires muscle stripping, bone resection, and retraction of the dural sac. Full-endoscopic spine surgery eliminates muscle trauma entirely.

  • Pencil-Thin Optical Port: High-definition 4K endoscope inserted through a 7 to 8 mm skin incision under continuous irrigation.

  • Zero Muscle Stripping: Dilators split muscle fibers rather than cutting or detaching paraspinal attachments.

  • Preserves Facet Joints: Protects native segmental biomechanics, virtually eliminating post-operative mechanical low back pain.

2. Transforaminal vs. Interlaminar Approaches

Surgical route selection is tailored precisely to the anatomical location of the disc fragment:

  1. Transforaminal (PELD): Direct trajectory through Kambin's triangle under local anesthesia for foraminal, extraforaminal, and L1-L4 central disc herniations.

  2. Interlaminar (PEID): Ideal for L5-S1 herniations where the high iliac crest obstructs a lateral transforaminal pathway.

  3. Unilateral Biportal Endoscopy (UBE / ULBD): Uses two separate 5 mm ports for bilateral decompression of severe central canal stenosis from a unilateral approach.

"Full-endoscopic spine surgery utilizes a 7mm pencil-sized camera port with continuous saline irrigation, removing herniated disc fragments while leaving spinal stabilizing ligaments and facet joints 100% untouched." — Dr. Deepak Garg
Spica Healthcare Clinical & Surgical Protocol Illustration #110
Spica Healthcare Clinical & Surgical Protocol Illustration #110

3. Intraoperative High-Definition Safety & Hemostasis

Continuous saline fluid irrigation tamponades epidural venous bleeding, provides crystal-clear visualization of the traversing nerve root, and minimizes surgical site infection rates to near zero (<0.1%).

CLINICAL CAUTION: Traditional extensive laminectomies remove substantial stabilizing facet joint bone, predisposing patients to secondary spinal instability and requiring metal fusion screws.

4. Day-Care Recovery & Immediate Walking

Patients are mobilized out of bed within 2 hours post-surgery and typically discharged on the same evening or following morning with minimal need for oral opioids.

5. Peer-Reviewed References & Clinical Guidelines

1. Full-endoscopic versus open discectomy for lumbar disc herniation: A randomized controlled trial — Spine, 2021; 46(12): 785-794.

2. Unilateral biportal endoscopic decompression for lumbar spinal stenosis: Technical note and surgical outcomes — World Neurosurg, 2022; 158: e450-e459.

Frequently Asked Patient Questions

Limb Salvage with modular titanium megaprosthesis removes the tumor completely while preserving the limb, allowing patients to walk, work, and maintain full social independence without the physical disability of an artificial limb.

Dr. Deepak Garg - Director & Senior Joint Replacement, Spine and Orthopaedic Oncologist

Senior Consultant & Clinical Director — Orthopaedic Oncology & Robotic Joint Surgery

MBBS (TNMC Mumbai), DNB Orthopaedics (PGI & SP Miraj), Fellowship Arthroplasty and Arthroscopy (Fortis Hospital, New Delhi), Fellowship Orthopaedic Oncology (Rajiv Gandhi Cancer Institute, New Delhi)

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Dr. Deepak Garg - Director & Senior Joint Replacement, Spine and Orthopaedic Oncologist

Dr. Deepak Garg

Senior Consultant & Clinical Director — Orthopaedic Oncology & Robotic Joint Surgery

16+ Yrs Exp

MBBS (TNMC Mumbai), DNB Orthopaedics (PGI & SP Miraj), Fellowship Arthroplasty and Arthroscopy (Fortis Hospital, New Delhi), Fellowship Orthopaedic Oncology (Rajiv Gandhi Cancer Institute, New Delhi)

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