Posterior Thoracic Approach/Decompression

108 Posterior Thoracic Approach/Decompression
Michael G. Kaiser


♦ Preoperative


Imaging



  • P lain x-rays

    • Determine number of ribs for localization
    • Assess deformity and/or instability

  • Magnetic resonance imaging (MRI)

    • Determine extent of neural element compression

  • Computed tomography

    • Evaluate bony anatomy

  • Computed tomography/myelogram

    • If MRI contraindicated

Operative Planning



  • Patient counseling regarding risk, benefits, and postoperative course

Routine Equipment



  • Basic spine tray including Kerrison rongeurs (2 to 4 mm)
  • Cautery—monopolar and bipolar
  • High-speed drill (e.g., Midas Rex)
  • Headlight and loupe magnification

Special Equipment



  • Cell Saver (Haemonetics, Braintree, MA)—if significant blood loss is anticipated in the absence of infection/neoplastic disease
  • Microscope for intradural pathology

Operating Room Set-up



Anesthetic Issues



  • Secure endotracheal tube for prone position
  • Appropriate blood pressure monitoring
  • Foley catheter for extended cases (beyond 3 hours)
  • Perioperative antibiotics 30 minutes prior to skin incision
  • Perioperative steroids for decompressive or intradural pathology
  • Avoid any orbital compression if patient’s face is placed on cushioned mask

♦ Intraoperative (Fig. 108.1)


Positioning



  • Prone position

    • Arms tucked along side for pathology rostral to T6–T7

      • Head secured with Mayfield head holder or Gardner-Wells tongs and 15 pounds of traction

    • Arms abducted and placed on cushioned boards for pathology caudal to T6–T7

  • Maintain exposure of posterior iliac crest if fusion intended.


image

Fig 108.1 Schematic of posterior thoracic approach and decompression. Dorsal decompression with removal of spinous processes and laminae. C, spinal cord.

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Jul 11, 2016 | Posted by in NEUROSURGERY | Comments Off on Posterior Thoracic Approach/Decompression

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