Isolated thoracolumbar transverse process fractures: call physical therapy, not spine

Historically, thoracolumbar spine transverse process fractures (TVPFx) found on "plain films" of the spine were occasionally associated with occult, mechanically significant vertebral fractures. Thus, "log-roll precautions" have been used pending formal spine evaluation and further imaging. As integrated helical computed tomography (CT) scans of the torso have become routine screening tools in high-energy trauma, TVPFx have been diagnosed with far greater frequency. Yet, where no associated spine injuries are found initially, such isolated TVPFx appear to be benign.

We retrospectively reviewed the diagnosis and management of TVPFx in a large Level I trauma center in the period between 2002 and 2005. Of 314 patients with TVPFx who survived more than 48 hours, 17% had fractures of the weight-bearing columns of the thoracolumbar spine noted on the same CT scan and were excluded from study. The management and outcome of the remaining "isolated" TVPFx were assessed by review of trauma registry and charted data.

The 248 patients included sustained 2.3 +/- 1.5 (SD) TVPFx. They spent 29 hours +/- 32 hours on log-roll precautions while being evaluated by spine consultants and "cleared" before initiating physical therapy. Despite this prolonged immobilization and substantial further investigation, none of the patients with TVPFx judged to be isolated on the basis of screening truncal CT scan proved to have a missed injury of a major vertebral element on further study.

Isolated thoracolumbar TVPFx are found frequently when helical CT scan is used to screen the torso after high-energy injury. TVPFx are usually multiple. They can be markers for visceral injuries, and in this study, 17% were associated with "significant" fractures. TVPFx require careful pain management and benefit by early mobilization. Yet, where no other vertebral fracture is seen on an adequate screening CT scan, investigation may reasonably end. Further imaging and consultations with spine services waste scarce resources, and lead to prolonged log-roll precautions, which delay mobilization and are potentially deleterious to overall patient care.