♦ Preoperative
Imaging
- P lain x-rays
- Determine number of ribs for localization
- Assess deformity and/or instability
- Determine number of ribs for localization
- 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
- Prone table: Jackson table with Wilson frame or bolsters
- Mayfield head holder versus Gardner-Wells tongs with traction
- Intraoperative anteroposterior and lateral x-ray versus fluoroscopy
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
- Arms tucked along side for pathology rostral to T6–T7
- Maintain exposure of posterior iliac crest if fusion intended.

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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