The spine journal : official journal of the North American Spine Society
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Observational Study
Revision rates and complication incidence in single- and multilevel anterior cervical discectomy and fusion procedures: an administrative database study.
The natural history of cervical degenerative disease with operative management has not been well described. Even with symptomatic and radiographic evidence of multilevel cervical disease, it is unclear whether single- or multilevel anterior cervical discectomy and fusion (ACDF) procedures produce superior long-term outcomes. ⋯ In this study, we report rates of adverse events and the need for revision surgery in patients undergoing single versus multilevel ACDFs. Increasing number of levels fused at the time of index surgery correlated with increased rate of reoperations. Multilevel ACDF patients requiring additional surgery more often underwent more extensive revision surgeries.
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Nonorganic low back pain (NOLBP) is common in the worker's compensation (WC) population. Consults with specialists constitute an unnecessary cost to the system, and a means of screening for these patients is necessary. ⋯ We found a significant association between certain easily identifiable criteria and NOLBP in a cohort of WC patients. These criteria included mechanism of injury including slip and fall or lifting of a patient, alleged injury in greater than two bodily areas, presence of concomitant cervical and/or thoracic complaints, initial presentation to chiropractor, and areas of pain different from first report of injury. More than 95% of patients with three or more of the aforementioned criteria were found to have nonorganic pain. This information may help the specialist and the WC provider identify patients at a high risk for nonorganic pain, thereby reducing unnecessary costs.
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Randomized Controlled Trial
Dose-response and efficacy of spinal manipulation for care of chronic low back pain: a randomized controlled trial.
There have been no full-scale trials of the optimal number of visits for the care of any condition with spinal manipulation. ⋯ The number of spinal manipulation visits had modest effects on cLBP outcomes above those of 18 hands-on visits to a chiropractor. Overall, 12 visits yielded the most favorable results but was not well distinguished from other dose levels.
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Although anterior cervical discectomy and fusion (ACDF) is an effective treatment option for patients with cervical disc herniation, it limits cervical range of motion, which sometimes causes discomfort and leads to biomechanical stress at neighboring segments. In contrast, cervical artificial disc replacement (ADR) is supposed to preserve normal cervical range of motion than ACDF. A biomechanical measurement is necessary to identify the advantages and clinical implications of ADR. However, literature is scarce about this topic and in those available studies, authors used the static radiological method, which cannot identify three-dimensional motion and coupled movement during motion of one axis. ⋯ Three-dimensional motion analysis could provide useful information in an objective and quantitative way about cervical motion after surgery. In addition, it allowed us to measure not only main motion but also coupled motion in three planes. ADR demonstrated better retained cervical motion mainly in sagittal plane (flexion and extension) and better preserved coupled sagittal and coronal motion during transverse plane motion than ACDF. ADR had the advantage in that it had the ability to preserve more cervical motions after surgery than ACDF.
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A precise and comprehensive definition of "normal" in vivo cervical kinematics does not exist due to high intersubject variability and the absence of midrange kinematic data. In vitro test protocols and finite element models that are validated using only end range of motion data may not accurately reproduce continuous in vivo motion. ⋯ A significant portion of the intersubject variability in cervical kinematics can be explained by the disc height and the static orientation of each motion segment. Clinically relevant information may be gained by assessing intervertebral kinematics during continuous functional movement rather than at static, end range of motion positions. The fidelity of in vitro cervical spine mechanical testing protocols may be evaluated by comparing in vitro kinematics to the continuous motion paths presented.