Spinal Trauma Intervention: MAST Fusion

Minimal Access Spinal Technology

Because of his general health, the patient was not deemed fit for a major reconstructive procedure. Prolonged bedrest was also preferably avoided. In view of this he was offered percutaneous pedicle screw fusion via the MAST (Minimal Access Spinal Technology) technique using the Sextant® apparatus (Medtronic-Sofamor Danek, Memphis, TN).

The patient is shown below (Figure 3) positioned in preparation for the surgery:

patient positioning
Figure 3

Using the sextant apparatus the T11 and then the L1 pedicles were sequentially cannulated with 5.5 x 45 mm screws. 4 screws were placed with 2 rods. The procedure was performed through a total of six 2 cm incisions. The Intraoperative imaging is shown below in Figure 4:

intraoperative imaging screw placement
Figure 4

The incisions at the end of the case are shown as below in Figure 5:

Figure 5

There were no problems intraoperatively and no appreciable blood loss. The patient was transferred to the ward uneventfully. Total operating time was 75 minutes.

Postoperative CT scanning showed the position of the pedicle screws:

L1 (Figure 6):

postop ct scan pedicle screws
Figure 6

T12 (Figure 7):

postop ct scan pedicle screws
Figure 7

The patient was mobilized in TLSO with no adverse surgical complications.

Postoperative CT scanning and x-rays 1 week after surgery are shown below in Figures 8a and 8b:

lateral view screw placement
Figure 8a

lateral view pedicle screws
Figure 8b

Four weeks after surgery he was transferred to the rehabilitation service with no complications as a result of the stabilization. It would be envisioned that the instrumentation would be removed 12 months after surgery.

Updated on: 09/26/12
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MAST Fusion Discussion: Spinal Trauma

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