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John A Bendo: Influence Statistics

STUDY DESIGN: This is a retrospective, independent study comparing 2 groups of patients treated surgically for discogenic low back pain associated with degenerative disc disease (DDD) in the lumbosacral spine.

OBJECTIVE: To compare the surgical and hospitalization charges associated with 1- and 2-level lumbar total disc replacement and circumferential lumbar fusion.

SUMMARY OF BACKGROUND DATA: Reported series of lumbar total disc replacement have been favorable. However, economic aspects ...

STUDY DESIGN: A prospective, randomized, multicenter, Food and Drug Administration-regulated Investigational Device Exemption clinical trial.

OBJECTIVE: To evaluate the safety and effectiveness of the ProDisc-L (Synthes Spine, West Chester, PA) lumbar total disc replacement compared to circumferential spinal fusion for the treatment of discogenic pain at 1 vertebral level between L3 and S1.

SUMMARY OF BACKGROUND DATA: As part of the Investigational Device Exemption clinical trial, ...

BACKGROUND CONTEXT: Cervical total disc replacement (TDR) is an emerging technology. However, the factors that influence postoperative range of motion (ROM) and patient satisfaction are not fully understood.

PURPOSE: To evaluate the influence of pre- and postoperative disc height on postoperative motion and clinical outcomes.

STUDY DESIGN/SETTING: Retrospective review of patients enrolled in prospective randomized Food and Drug Administration (FDA) trial.

PATIENT SAMPLE: One hundred ...

BACKGROUND CONTEXT: Vertebral artery (VA) injury can be a catastrophic iatrogenic complication of cervical spine surgery. Although the incidence is rare, it has serious consequences including fistulas, pseudoaneurysm, cerebral ischemia, and death. It is therefore imperative to be familiar with the anatomy and the instrumentation techniques when performing anterior or posterior cervical spine surgeries.

PURPOSE: To provide a review of VA injury during common anterior and posterior ...

STUDY DESIGN: Analysis of the Nationwide Inpatient Sample database.

OBJECTIVE: To investigate national trends, risks, and benefits of surgical interventions for degenerative spondylolisthesis (DS).

SUMMARY OF BACKGROUND DATA: The surgical management of DS continues to evolve whereas the most clinically and cost-effective treatment is debated. With an aging US population and growing restraints on a financially burdened health care system, a clear understanding of national trends in the ...

STUDY DESIGN: Retrospective review of an administrative database.

OBJECTIVE: To observe New York statewide trends in lumbar spine surgery and to compare utilization of fusion according to hospital size and patient population.

SUMMARY OF BACKGROUND DATA: Over the last 30 years, studies have indicated increasing rates of spinal fusion procedures performed each year in the United States. There is no study investigating potential variability in this trend according to hospital ...

BACKGROUND CONTEXT: Lumbar radiculopathy is commonly caused by degenerative conditions such as a herniated disc or lumbar spinal stenosis. Less common etiologies include intraspinal extradural masses such as synovial cysts and gas-containing ganglion cysts. Intraspinal extradural cysts that communicate with the intervertebral disc are a rare entity and thus, an uncommon cause of lumbar radiculopathy. There are only ten cases of an intervertebral disc cyst reported in the ...

BACKGROUND CONTEXT: Recent research describes the use of a nerve root sedimentation sign to diagnose lumbar spinal stenosis (LSS). The lack of sedimentation of the nerve roots (positive sedimentation sign) to the dorsal part of the dural sac is the characteristic feature of this new radiological parameter.

PURPOSE: To demonstrate how the nerve root sedimentation sign compares with other more traditional radiological parameters in patients who have been operated for LSS.

STUDY ...

BACKGROUND CONTEXT: Degenerative lumbar stenosis (DLS) patients have been reported to lean forward in an attempt to provide neural decompression. Spinal alignment in patients with DLS may resemble that of adult spinal deformity (ASD). No previous studies have compared and contrasted the compensatory mechanisms of DLS and ASD patients.

PURPOSE: This study aimed to determine the differences in compensatory mechanisms between DLS and ASD patients with increasing severity of sagittal ...

BACKGROUND CONTEXT: Anterior lumbar surgery is a common procedure for anterior lumbar interbody fusion and disc replacement but the impact of obesity on this procedure has not been determined.

PURPOSE: To assess the perioperative outcomes of anterior retroperitoneal lumbar surgery in obese versus non-obese patients.

STUDY DESIGN/SETTING: Prospective review of patients with anterior retroperitoneal lumbar disc procedures

PATIENT SAMPLE: Seventy-four patients with anterior retroperitoneal ...

BACKGROUND CONTEXT: The golf swing imparts significant stress on the lumbar spine. Not surprisingly, low back pain (LBP) is one of the most common musculoskeletal complaints among golfers.

PURPOSE: This article provides a review of lumbar spine forces during the golf swing and other research available on swing biomechanics and muscle activity during trunk rotation.

STUDY DESIGN: The role of "modern" and "classic" swing styles in golf-associated LBP, as well as LBP causation theories, ...

STUDY DESIGN: Cohort.

OBJECTIVE: To compare the perioperative morbidity of patients with cardiac stents after spine surgery who continue to take aspirin before and after the operation with a similar group of patients who preoperatively discontinued aspirin.

SUMMARY OF BACKGROUND DATA: The preoperative discontinuation of anticoagulant therapy has been the standard of care for orthopedic surgical procedures. However, recent literature has demonstrated significant cardiac risk associated ...

STUDY DESIGN: Retrospective cohort study.

OBJECTIVE: To assess the rate and causes of unplanned readmissions after surgical treatment of common degenerative lumbar pathologies within 90 days.

SUMMARY OF BACKGROUND DATA: With pay-for performance and bundled payment compensation models being implemented; there is a growing emphasis to decrease the number of unplanned readmissions after surgery. Reports on degenerative lumbar spine pathology readmission rates are often obtained from ...

BACKGROUND CONTEXT: Somatosensory evoked potentials (SSEP) are commonly used to monitor the spinal cord and nerve roots during operative procedures that put those structures at risk. The utility of SSEPs to evaluate cauda equina and nerve root function during posterior spinal arthrodesis with pedicular fixation for degenerative lumbar disease has been reported anecdotally and remains controversial.

PURPOSE: An institution-wide review of the ability of SSEP readings to monitor nerve ...

STUDY DESIGN: Retrospective study of patients enrolled in prospective randomized Food and Drug Administration trial.

OBJECTIVE: To evaluate the influence of pre- and postoperative disc height on postoperative motion and clinical outcomes.

SUMMARY OF BACKGROUND DATA: Our understanding of the factors that influence motion and ultimately patient satisfaction after lumbar disc replacement continues to evolve.

METHODS: Forty-two patients with a single level ProDisc-L at either the L4/5 or ...