Case Prep: Cervical Laminoplasty

Case / Approach Snapshot

• Anatomy at risk: level localization, cord/cauda equina, exiting and traversing roots, dura, vertebral artery or segmental vessels, esophagus/trachea/pleura/viscera by approach, and fusion/instrumentation landmarks.
• Operative steps: position and pad carefully, confirm level, expose the planned corridor, decompress neural elements, reconstruct or instrument when indicated, verify alignment/hardware, and close with attention to hematoma and wound risk; use the detailed operative sequence and approach notes below as the step-by-step source.
• Rescue plans: wrong level, durotomy, neurologic change, vertebral artery/visceral/pleural injury, graft or hardware problem, epidural hematoma, dysphagia/airway issue, and infection prevention/escalation.
• Figures: review Figures, Imaging & Video and the Curated Image Set; embedded local figures should remain open-access, public-domain, or otherwise reusable with attribution.
• Papers: review High-Yield Literature for seminal sources, modern reviews, and outcome data specific to this page.

One-Liner

[Age]yo [M/F] with multilevel cervical spondylotic myelopathy / OPLL ([C_-C_]) with preserved lordosis planned for [open-door / French-door] cervical laminoplasty (motion-preserving posterior decompression).

Figures, Imaging & Video

🎥 Operative video — search operative video on YouTube ▸ · The Neurosurgical Atlas ▸

🧭 Operative approach: Posterior cervical approach — detailed corridor setup, step-by-step technique & figures

Neurosurgical Atlas · AO Spine / Surgery Reference · Radiopaedia · PubMed Central — operative figures © linked; see media-sources.md

High-Yield Literature

• Cervical laminoplasty: indication, technique, complications — Weinberg DS. Journal of spine surgery (Hong Kong) 2020. PubMed
• Cervical laminoplasty — Steinmetz MP. The spine journal : official journal of the North American Spine Society 2006. PubMed
• Laminoplasty for cervical myelopathy — Ito M. Global spine journal 2012. PubMed
• Cervical Laminoplasty: Indications, Surgical Considerations, and Clinical Outcomes — Cho SK. The Journal of the American Academy of Orthopaedic Surgeons 2018. PubMed
• Cervical Laminoplasty: The History and the Future — Kurokawa R. Neurologia medico-chirurgica 2015. PubMed
• Cervical laminoplasty versus laminectomy and fusion: An umbrella review of postoperative outcomes — Jagtiani P. Neurosurgical review 2023. PubMed
• Deformity Considerations in Cervical Laminoplasty: A Narrative Review — Drain JP. Clinical spine surgery 2025. PubMed
• Cervical laminoplasty: a critical review — Ratliff JK. Journal of neurosurgery 2003. PubMed
• Cervical laminoplasty — Mehdain H. European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society 2014. PubMed
• Factors predicting loss of cervical lordosis following cervical laminoplasty: A critical review — Alam I. Journal of craniovertebral junction & spine 2020. PubMed

Curated Image Set

Open-access figures are embedded from PubMed Central articles and kept unique to this guide.

Fig. 2. Pre-op lateral radiograph. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evidence-Based Spine-Care Journal 2013; open access.

Fig. 3. Pre-op magnetic resonance image sagittal view. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evidence-Based Spine-Care Journal 2013; open access.

Fig. 4. Pre-op computed tomography sagittal view. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evidence-Based Spine-Care Journal 2013; open access.

Fig. 5. Post-op lateral radiograph. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evidence-Based Spine-Care Journal 2013; open access.

Figure 5. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evid Based Spine Care J. 2013 Oct;4(2):105–15. doi: 10.1055/s-0033-1357361; open access.

Figure 6. Source: Comparative Effectiveness of Different Types of Cervical Laminoplasty — Evid Based Spine Care J. 2013 Oct;4(2):105–15. doi: 10.1055/s-0033-1357361; open access.

Figure 1. (A) The top view of unilateral open-door laminoplasty (Hirabayashi’s method). Three laminae are lifted bilaterally. (B) The axial view of unilateral open-door laminoplasty. The lamina is… Source: Laminoplasty for Cervical Myelopathy — Global Spine Journal 2012; open access.

Figure 2. (A) Bilateral open-door laminoplasty. The top view of Kurokawa’s method. The spinous processes and laminae are split at the midline and opened. (B) A block of bone graft is placed… Source: Laminoplasty for Cervical Myelopathy — Global Spine Journal 2012; open access.

Figure 3. (A) Muscle-preservation approach for cervical laminoplasty (Shiraishi’s method). Divide the interspinalis muscles by a pair of nerve retractors. (B) Split the spinous processes with a… Source: Laminoplasty for Cervical Myelopathy — Global Spine Journal 2012; open access.

Figure 4. (A) A preoperative sagittal computed tomography (CT) image of the cervical spine of a 62-year-old man shows cervical ossification of the posterior longitudinal ligament (OPLL) from C3 to… Source: Laminoplasty for Cervical Myelopathy — Global Spine Journal 2012; open access.

History of Present Illness

• Chief complaint: Cervical myelopathy from multilevel dorsal compression
• Laminoplasty advantages: decompresses multiple levels while preserving motion and avoiding fusion morbidity; lower kyphosis/instability risk than laminectomy alone
• Requires preserved lordosis (cord drifts back); avoid in kyphosis, significant neck pain (fusion may be better), or instability

Past Medical History

• Cervical alignment (lordosis required), axial neck pain severity (laminoplasty doesn’t address mechanical pain well)
• RA, instability (relative contraindications), smoking
• Standard PMH

Imaging Review

X-ray (lateral, flexion/extension)

• Lordosis preserved (key), no instability, K-line (OPLL)

  MRI

• Multilevel dorsal cord compression, T2 signal, levels

  CT

• OPLL, laminar/lateral mass anatomy, canal dimensions

Labs

• CBC, BMP, Coags, Type and screen, HbA1c

Neurological Examination

• Full myelopathy exam (mJOA/Nurick), myotomal/dermatomal, gait

Surgical Planning

Case Logistics, OR Needs & Orders

• OR table/bed: radiolucent spine-capable table selected for approach, imaging, instrumentation, patient size, and alignment goals; keep abdomen free for prone cases.
• OR setup: radiolucent/Jackson table, fluoroscopy or O-arm/navigation, microscope/loupes for decompression, implant trays/graft ready for fusion, neuromonitoring for myelopathy/cord-risk cases, and postop brace plan confirmed.
• Special needs: arterial line/Foley/type-screen for long fusion/corpectomy, no long paralytic when MEPs are used, MAP/normotension for myelopathy or cord-risk cases, antibiotic redosing, and anticoagulation/DVT plan.
• Immediate postop orders: neuro checks by myotome/sensory level, airway/dysphagia watch for anterior cervical cases, CT/X-rays per construct, drain care, brace/activity orders, DVT prophylaxis timing, bowel regimen, and PT/OT mobilization.

Position

• OR table/bed: radiolucent spine-capable table selected for approach, imaging, instrumentation, patient size, and alignment goals; keep abdomen free for prone cases.
• Prone, Mayfield, neutral/slight flexion preserving lordosis, reverse Trendelenburg, shoulders taped, eyes protected
• IONM check after positioning

Technique Variants

• Open-door (Hirabayashi): hinge on one side (greenstick trough), open the other side, prop open with plates/spacers
• French-door (double-door): midline split, hinge bilaterally, open like double doors with central spacer

Key Surgical Steps (Open-door)

1. Midline incision, subperiosteal exposure of laminae (preserve facet capsules/muscle attachments where possible)
2. Fluoroscopic level confirmation
3. Hinge side: create a partial-thickness trough at lamina-lateral mass junction (outer cortex through, inner cortex intact = greenstick hinge) with high-speed drill
4. Open side: complete trough through both cortices (contralateral lamina-lateral mass junction)
5. Carefully lift/open the laminar door (hinge bends), gently elevating lamina away from cord — release ligamentum/adhesions, avoid cord pressure
6. Maintain the open position with mini-plates/spacers (or sutures/bone struts) at each opened level
7. Confirm decompression; foraminotomy if needed
8. Hemostasis, drain, layered closure

Critical Anatomy & Structures at Risk

1. Spinal cord — during opening (avoid downward pressure), epidural bleeding
2. C5 nerve root — C5 palsy (as with laminectomy)
3. Hinge fracture (complete fracture → instability of that door)
4. Facets (preserve — avoid fusion/instability)

Equipment

• High-speed drill (key for troughs/hinge), Kerrison
• Laminoplasty plates/spacers (open-door) or bone strut/spacer (French-door), fluoroscopy
• Hemostatic agents, drain

Monitoring

• SSEPs, MEPs, EMG; check after positioning and during door opening

Anesthesia

• MAP > 85, no paralytic (IONM), prone precautions (eyes), TXA

Potential Complications

1. C5 palsy (deltoid/biceps weakness, usually recovers)
2. Hinge fracture / door closure (reclosure → recurrent stenosis)
3. Axial neck pain, reduced ROM/stiffness, kyphosis
4. Epidural hematoma, CSF leak, infection, inadequate decompression

Operative Note Template

Preoperative Diagnosis: Multilevel cervical spondylotic myelopathy [/ OPLL] [C_-C_] with preserved lordosis

Postoperative Diagnosis: Same

Procedure: [Open-door (Hirabayashi) / French-door] cervical laminoplasty [C_-C_]

Surgeon / Assistant: Anesthesia: General endotracheal EBL / Fluids: Adjuncts: High-speed drill, fluoroscopy; SSEP/MEP/EMG Implants: Laminoplasty mini-plates/spacers Monitoring: SSEP/MEP — stable Complications: None

Indications: [Age]yo [M/F] with multilevel cervical myelopathy and preserved lordosis, suitable for motion-preserving posterior decompression. Risks (C5 palsy, axial pain, hinge fracture) discussed.

Description of Procedure: After consent and time-out, general anesthesia was induced and neuromonitoring established with stable baselines after prone positioning in Mayfield (neutral lordosis preserved). A midline exposure of the laminae [C_-C_] was performed and levels confirmed.

A hinge trough (partial-thickness greenstick) was created at one lamina–lateral mass junction and an open-side trough (full-thickness) at the contralateral junction with the high-speed drill. The laminar “door” was gently opened, elevating the laminae off the cord and releasing adhesions, and maintained open with mini-plates/spacers at each level. Decompression was confirmed and foraminotomies performed as needed. The facets were preserved to avoid instability/fusion.

Hemostasis was obtained, a drain placed, and closure performed in layers. The patient was awakened [at baseline] and transferred with C5-palsy precautions.

Postoperative Plan

• Step-down/floor, neuro checks q2h (C5 palsy watch)
• Early mobilization, soft collar briefly, early ROM exercises (reduce stiffness)
• X-rays POD1, drain management, DVT prophylaxis
• Pain control, follow-up imaging; counsel re: axial pain/stiffness and C5 palsy

Chief-Level Case Review

Use these as the senior-level mental model for Cervical Laminoplasty:

• Decision point: Localize twice and instrument once: numbering, transitional anatomy, prior hardware, rib count, navigation dataset, and fluoroscopic level confirmation are mandatory.
• Technical lever: Positioning is treatment: table choice, abdomen-free prone setup, alignment goals, shoulders/hips, eyes/plexus pressure, neuromonitoring baselines, and fluoroscopic access all change the case.
• Bailout: Protect neural elements by sequence: decompression before correction when needed, MAP support for cord risk, no long paralytic with MEPs, and immediate response to signal change.
• Postop watch: Finish with construct logic: decompression adequacy, screw purchase, alignment, fusion bed/graft, drain plan, brace/activity orders, postop CT/X-rays, and DVT timing.

Common Pimp Questions

Use these to pressure-test preparation for Cervical Laminoplasty:

1. What neurologic level and root are responsible for the presenting deficit?
2. What is the decompression target and how will you know it is adequately decompressed?
3. What instability, deformity, bone-quality, or fusion variable changes the construct?
4. What vascular, visceral, dural, or neural structure is the main structure at risk?
5. What postop brace, drain, mobilization, MAP, antibiotic, and DVT plan should be ordered?

Attending Preference Variables

Items that commonly vary by surgeon or institution:

• Positioning frame, arms, traction, and localization workflow: [attending-specific]
• Navigation/robot/fluoro use, screw system, graft/biologic choice, and drain threshold: [attending-specific]
• Neuromonitoring modality and MAP goal for myelopathy, deformity, or cord-risk cases: [attending-specific]
• Brace, Foley, antibiotics, mobilization, and DVT prophylaxis timing: [attending-specific]