Boyle cheng zfuse manual#
Boyle cheng zfuse registration#

To summarize current technological advances from earlier expandable lumbar interbody fusion devices to implants with vertical and medial-to-lateral expansion mechanisms.

Their development was prompted by some common problems associated with static interbody cages, including migration, expulsion, dural or neural traction injury, and pseudarthrosis. VMA results in a significant reduction in measurement variability of intervertebral rotation measurements.Д¬ontrolled motion bending flexion/extension radiographs lumbar spine variability vertebral motion analysis (vma).Expandable cages have gone through several iterations since they first appeared on the market in the early 2000s. Recent developments in using computerized imaging processes has improved, however there remains variability in patient bending due to the self-selected rate and position of the bending.

Boyle cheng zfuse manual#

The current standard of care for functional testing of the lumbar spine utilizes uncontrolled FE with a manual data evaluation process. These findings are consistent across asymptomatic and symptomatic patients. When comparing measurement variability between FE and VMA, results indicate between a 26% to 46% decrease in measurement variability under VMA compared to FE. There was statistical greater measurement variability in intervertebral rotation in FE when compared to VMA (both standing and lying). The FE data were assessed from voluntary bending by the patient.

Boyle cheng zfuse registration#

The VMA measurements for assessing intervertebral motion were characterized by the use of: (1) a handling device that assists patients through a standard arc of lumbar bending in both an upright and recumbent posture (70 degree flexion/extension arcs 60 degree left/right bending arcs) (2) video fluoroscopy imaging of the lumbar spine during bending (capturing images at 8 frames per second) and (3) image processing software capable of automatic frame-to-frame registration and tracking of vertebral bodies across the sequence of video-fluoroscopic images to derive measurements of intervertebral rotation and translation. The resulting standard deviation of the intervertebral rotation determinations was used as the measure of variability. Measurement variability was determined by the mean and standard deviation of intervertebral rotation when evaluated by 5 independent observers evaluating each of the 109 patients FE and VMA. Each patient agreed to undergo fluoroscopic still imaging to capture FE data and to undergo cine fluoroscopic imaging to capture VMA data. The research was designed to compare studies involving FE to controlled motion bending radiographs using the Vertebral Motion Analysis (VMA), (Ortho Kinematics, Inc) within the same patient. One-hundred nine patients (57 asymptomatic, 52 symptomatic) were consented in the prospective investigation. To compare the measurement variability of lumbar spine motion when diagnosed using measurements of intervertebral motion taken from standard bending flexion/extension radiographs (FE) between uncontrolled and controlled motion. Recent advancements in functional lumbar spine testing utilize controlled bending and computerized imaging evaluation.

The current standard of care for function assessment of the lumbar spine focuses on uncontrolled patient directed motion which results in increased inter-patient variability. While there have been substantial advances in imaging technologies over the past 30 years, relatively little has changed in the methodologies for evaluating functionality of the lumbar spine.

While low back pain is one of the most prevalent, if not the most prevalent reasons for visits to physicians, a majority of patients with low back pain cannot be given a definitive diagnosis.