Correction to: adjacent level disease-background and update based on disc replacement data.

This article was published and transmitted with the lead author's name listed incorrectly in the citation. The correct citation is, in full: Kaye, I.D.

Which Domains of the ODI Best Predict Change in Physical Function in Patients After Surgery for Degenerative Lumbar Spondylolisthesis?

Study Design: A retrospective review.

Objective: The purpose of this study is to determine the differential improvement of the various individual items of the Oswestry Disability Index (ODI) and to determine their relationship to other measures of Health Related Quality of Life (HRQOL).

Summary Of Background Data: The ODI is an easily scored, common, 10-item questionnaire about symptoms relevant to lumbar spine pathology.

The Effect of Hospital Ownership on Health Care Utilization in Orthopedic Surgery.

Purpose: To determine if ownership of a specialty hospital or ambulatory surgery centers (ASC) affects surgical volume.

Materials And Methods: All surgeries performed by 75 orthopedic surgeons at a single practice between January 1, 2010 and March 1, 2015 were identified. During this time, the practice purchased an ownership stake in 1 hospital and 3 ASC.

The Effect of Postoperative Spinal Infections on Patient Mortality.

Study Design: A retrospective, matched cohort study.

Objectives: This study aims to investigate the association between surgical site infection (SSI) and mortality and ascertain any factors that predict mortality in those diagnosed with SSI.

Summary Of Background Data: Despite significant efforts toward mitigation, SSI, including deep infection, remains a common complication following spine surgery, Considerable morbidity may be associated with infection, including hospital readmission, revision surgery, and delayed rehabilitation.

Resource utilization for non-operative cervical radiculopathy: Management by surgeons versus non-surgeons.

Objectives: To compare the estimated resource utilization for non-operative treatment of cervical radiculopathy if managed by surgeons versus non-surgeons.

Patients And Methods: A Cervical Spine Research Society-sponsored survey was administered at a national spine surgery conference to surgeons and non-surgeons, as classified above. The survey asked questions regarding resource utilization and perceived costs for the "average patient" with cervical radiculopathy managed non-operatively.

Iatrogenic Spinal Cord Injury Resulting From Cervical Spine Surgery.

Study Design: Retrospective cohort study of prospectively collected data.

Objective: To examine the incidence of iatrogenic spinal cord injury following elective cervical spine surgery.

Methods: A retrospective multicenter case series study involving 21 high-volume surgical centers from the AOSpine North America Clinical Research Network was conducted.

C5 Palsy After Cervical Spine Surgery: A Multicenter Retrospective Review of 59 Cases.

Study Design: A multicenter, retrospective review of C5 palsy after cervical spine surgery.

Objective: Postoperative C5 palsy is a known complication of cervical decompressive spinal surgery. The goal of this study was to review the incidence, patient characteristics, and outcome of C5 palsy in patients undergoing cervical spine surgery.

Misplaced Cervical Screws Requiring Reoperation.

Study Design: A multicenter, retrospective case series.

Objective: In the past several years, screw fixation of the cervical spine has become commonplace. For the most part, this is a safe, low-risk procedure.

Incidence and Outcomes of Acute Implant Extrusion Following Anterior Cervical Spine Surgery.

Study Design: Multi-institutional retrospective case series of 8887 patients who underwent anterior cervical spine surgery.

Objective: Anterior decompression from discectomy or corpectomy is not without risk. Surgical morbidity ranges from 9% to 20% and is likely underreported.

Epidemiology and Outcomes of Vertebral Artery Injury in 16 582 Cervical Spine Surgery Patients: An AOSpine North America Multicenter Study.

Study Design: A multicenter retrospective case series was compiled involving 21 medical institutions. Inclusion criteria included patients who underwent cervical spine surgery between 2005 and 2011 and who sustained a vertebral artery injury (VAI).

Objective: To report the frequency, risk factors, outcomes, and management goals of VAI in patients who have undergone cervical spine surgery.

Epidural Hematoma Following Cervical Spine Surgery.

Study Design: A multicentered retrospective case series.

Objective: To determine the incidence and circumstances surrounding the development of a symptomatic postoperative epidural hematoma in the cervical spine.

Methods: Patients who underwent cervical spine surgery between January 1, 2005, and December 31, 2011, at 23 institutions were reviewed, and all patients who developed an epidural hematoma were identified.

Rare Complications of Cervical Spine Surgery: Pseudomeningocoele.

Study Design: This study was a retrospective, multicenter cohort study.

Objectives: Rare complications of cervical spine surgery are inherently difficult to investigate. Pseudomeningocoele (PMC), an abnormal collection of cerebrospinal fluid that communicates with the subarachnoid space, is one such complication.

Adjacent level disease-background and update based on disc replacement data.

Purpose Of Review: The precise etiology of adjacent segment disease following cervical spine surgery is controversial. Theories for development include inevitable changes secondary to the natural progression of the degenerative cascade and changes secondary to altered biomechanics of the fused cervical spine. Motion preserving techniques, such as cervical disc arthroplasties (CDA), have been introduced with the hopes of reducing the rates of adjacent segment pathology.

Does Medicaid Insurance Confer Adequate Access to Adult Orthopaedic Care in the Era of the Patient Protection and Affordable Care Act?

Background: A current appraisal of access to orthopaedic care for the adult patient receiving Medicaid is important, since Medicaid expansion was written into law by the Patient Protection and Affordable Care Act (PPACA).

Questions/purposes: (1) Do orthopaedic practices provide varying access to orthopaedic care for simulated patients with Medicaid insurance versus private insurance in a blinded survey? (2) What are the surveyed state-by-state Medicaid acceptance rates for adult orthopaedic practices in the current era of Medicaid expansion set forth by the PPACA? (3) Do surveyed rates of access to orthopaedic care in the adult patient population vary across practice setting (private vs academic) or vary with different Medicaid physician reimbursement rates? (4) Are there differences in the surveyed Medicaid acceptance rates for adult orthopaedic practices in states that have expanded Medicaid coverage versus states that have foregone expansion?

Methods: Simulated Patient Survey: We performed a telephone survey study of orthopaedic offices in four states with Medicaid expansion. In the survey, the caller assumed a fictitious identity as a 38-year-old male who experienced an ankle fracture 1 day before calling, and attempted to secure an appointment within 2 weeks.

Is It Necessary to Extend a Multilevel Posterior Cervical Decompression and Fusion to the Upper Thoracic Spine?

Study Design: A retrospective cohort analysis.

Objective: The aim of this study was to determine if there is a difference in the revision rate in patients who undergo a multilevel posterior cervical fusions ending at C7, T1, or T2-T4.

Summary Of Background Data: Multilevel posterior cervical decompression and fusion is a common procedure for patients with cervical spondylotic myelopathy, but there is little literature available to help guide the surgeon in choosing the caudal level of a multilevel posterior cervical fusion.

Performing an Anterior Cervical Discectomy and Fusion.

An anterior cervical discectomy and fusion is one of the most common procedures performed in spine surgery. It allows for a direct decompression of the spinal cord and the neural foramen. When performed properly, the results of this procedure are some of the best in spine surgery.

The Effect of Substance P on an Intervertebral Disc Rat Organ Culture Model.

Study Design: Laboratory study.

Objective: Evaluate the effect of substance P (SP) on an intervertebral disc rat organ culture model.

Summary Of Background Data: Monolayer cell experiments have demonstrated that exposure intervertebral disc tissue cells to SP leads to upregulation in inflammatory cytokine expression; however, this has not been evaluated in a more complex organ culture model.

Change in Angular Alignment Is Associated With Early Dysphagia After Anterior Cervical Discectomy and Fusion.

Study Design: Retrospective analysis of a prospective cohort.

Objective: Change in cervical angular alignment may be associated with dysphagia.

Summary Of Background Data: Bony deformities of the cervical spine may be associated with secondary contractures of soft tissues in the neck.

The Economic Implications of an Incidental Durotomy.

Study Design: Case-control.

Objective: The aim of this study was to determine the economic impact of an incidental durotomy in spine surgery.

Summary Of Background Data: An incidental durotomy during spine surgery does not affect long-term outcomes, but as reimbursement moves toward bundled payments, it may substantially affect the profitability of spine surgery.

Comparing the Treatment Algorithm and Complications for Patients Undergoing an Anterior Cervical Discectomy and Fusion at a Physician-Owned Specialty Hospital and a University-Owned Tertiary Care Hospital.

The purpose of this case-control study is to compare the treatment algorithm and complication rate for patients who undergo an anterior cervical discectomy and fusion at a physician-owned specialty hospital to those who undergo surgery at a university-owned tertiary care hospital. Two controls were identified for 77 patients, and no differences in demographic data were identified. The median time between the onset of symptoms and surgery was shorter for patients who had surgery at the tertiary care center than for patients who had surgery at the specialty hospital (26.

A Survey On Spine Surgeons' Opinions On The Release Of The Centers for Medicare and Medicaid Services Data.

Background: In April 2014 the Centers for Medicare and Medicaid Services (CMS) released a dataset for the public which included information on services provided by physicians and healthcare providers for Medicare beneficiaries in the 2012 calendar year. The objective of this study is to determine spine surgeons' opinions on the release of the CMS data, and determine how they feel this information may affect patient care.

Methods: A survey was sent to members of the Association for Collaborative Spine Research (ACSR) regarding their practice patterns and opinions on the release of the CMS data.

High Incidence of Undiagnosed Cervical Myelopathy in Patients With Hip Fracture Compared With Controls.

Objectives: To identify the incidence of undiagnosed cervical myelopathy in patients who fall and develop hip fractures compared with age-matched controls.

Design: Prospective, case-control study.

Setting: University level 1 Trauma Center.