Effect of lesion temperature on the durability of percutaneous radiofrequency rhizotomies to treat trigeminal neuralgia.

Objective: Percutaneous radiofrequency rhizotomy is a common procedure for trigeminal neuralgia (TN) that creates thermocoagulative lesions in the trigeminal ganglion. Lesioning parameters for the procedure are left to the individual surgeon's discretion, and published guidance is primarily anecdotal. The purpose of this work was to assess the role of lesioning temperature on long-term surgical outcomes.

The practical limits of high-quality magnetic resonance imaging for the diagnosis and classification of trigeminal neuralgia.

Background: Neurovascular compression (NVC) has been the primary hypothesis for the underlying mechanism of classical trigeminal neuralgia (TN). However, a substantial body of literature has emerged highlighting notable exceptions to this hypothesis. The purpose of this study is to assess the reliability and diagnostic accuracy of high resolution, high contrast MRI-determined neurovascular contact for TN.

Claims of Safety in Neurosurgical Literature: We Shouldn't Call Something Safe Without Strong Justification.

Background: Many articles published in the neurosurgical literature make claims of safety regarding interventions. The strength of evidence supporting these claims has not been systematically evaluated.

Objective: To evaluate the quality of evidence supporting claims of safety in the neurosurgery literature.

From the Historical Examples of Drs. Osler, Cushing, and Van Wagenen: Lessons on the Importance of Mentorship in Contemporary Neurosurgery.

Although the historical relationships between William Osler, Harvey Williams Cushing, and William Perine Van Wagenen are well known in the neurosurgical world, the nature of the mentor-mentee relationships that existed between these historical giants is not widely appreciated. In this historical vignette, we describe and exemplify such relationships, while at the same time extract important and applicable principles from them. We reviewed relevant primary and secondary sources that documented the interactions between Cushing, Osler, and Van Wagenen.

For the further training of individuals in neurosurgery II: the academic legacy of the William P. Van Wagenen Fellowship.

Objective: William P. Van Wagenen pursued a research fellowship in Europe early in his career under the recommendation of Harvey Cushing. Later, Van Wagenen would be instrumental in the establishment of the William P.

A Proof of Concept for Applying the Radicchi Index (hf) to Compare Academic Productivity and Scientific Impact Among Medical Specialties.

Many indices have been developed to assess the impact of scientific publications by investigators, disciplines, and institutions. The h-index has emerged as a leading tool in the assessment of the productivity of authors. Differences in publication and citation opportunity among specialties create inappropriate conclusions when the h-index is used to compare authors across different disciplines.

Bevacizumab for Hearing Preservation in Neurofibromatosis Type 2: Emphasis on Patient-Reported Outcomes and Toxicities.

Objective: Bevacizumab for hearing preservation in patients with neurofibromatosis type 2 (NF2) is an emerging practice. We set out to characterize the effectiveness and toxicity of bevacizumab in our patient group.

Study Design: Case series with chart review.

For the further training of individuals in neurosurgery: a history of the William P. Van Wagenen Fellowship.

The William P. Van Wagenen Fellowship, celebrating its 50th anniversary, is an annual award given by the AANS and administered by the Neurosurgery Research and Education Foundation (NREF). Named after its benefactor, Dr.

Assessing the accuracy of neurological surgery resident case logs at a single institution.

Background: Despite the importance of case logs in evaluating residents, no studies assess their accuracy in neurological surgery. Studies from other specialties reveal variations in reporting. This study assesses the accuracy of neurological surgery resident case logs at a single institution.

Accuracy of the ABC/2 Score for Intracerebral Hemorrhage: Systematic Review and Analysis of MISTIE, CLEAR-IVH, and CLEAR III.

Background And Purpose: The ABC/2 score estimates intracerebral hemorrhage (ICH) volume, yet validations have been limited by small samples and inappropriate outcome measures. We determined accuracy of the ABC/2 score calculated at a specialized reading center (RC-ABC) or local site (site-ABC) versus the reference-standard computed tomography-based planimetry (CTP).

Methods: In Minimally Invasive Surgery Plus Recombinant Tissue-Type Plasminogen Activator for Intracerebral Hemorrhage Evacuation-II (MISTIE-II), Clot Lysis Evaluation of Accelerated Resolution of Intraventricular Hemorrhage (CLEAR-IVH) and CLEAR-III trials.

Evidence-based assessment of well-established interventions: the parachute and the epidural hematoma.

Background: The methods of evidence-based medicine are a relatively recent development in the understanding of clinical practice. They are criticized as not providing support for interventions long held to be highly effective based on experience that predated the availability of evidence-based analysis.

Objective: To determine if the methods of evidence-based medicine can be successfully applied to interventions established before those methods were developed.

The effect of duty hour regulations on outcomes of neurological surgery in training hospitals in the United States: duty hour regulations and patient outcomes.

Object: The effects of sleep deprivation on performance have been well documented and have led to changes in duty hour regulation. New York State implemented stricter duty hours in 1989 after sleep deprivation among residents was thought to have contributed to a patient's death. The goal of this study was to determine if increased regulation of resident duty hours results in measurable changes in patient outcomes.

Vaccination with dendritic cells loaded with allogeneic brain tumor cells for recurrent malignant brain tumors induces a CD4(+)IL17(+) response.

Background: We tested the hypothesis that a novel vaccine developed from autologous dendritic cells (DC) loaded with cells from a unique allogeneic brain tumor cell line (GBM6-AD) would be well-tolerated and would generate an immune response.

Method: Patients with recurrent primary brain tumors underwent vaccination with GBM6-AD/DC vaccine. Subjects were treated at escalating DC cell doses: 5 × 10(6) (one patient), 10 × 10(6) (one patient) and 15 × 10(6) (6 patients).

75 years of neurosurgery at the University of Minnesota.

Neurosurgery began as a distinct discipline at the University of Minnesota in 1937 with the appointment of William Peyton as head of the division. Under the leadership of Peyton, Lyle French, and Shelley Chou, the Department rose to national prominence. Substantial contributions included the introduction of dexamethasone to the practice of neurosurgery by Galicich and French, early procedures for the transthoracic correction of spinal deformity, important contributions to the understanding of brain death, the early laboratory work that led to the development of nimodopine, one of the first intraoperative magnetic resonance imaging facilities in the United States (1996), and the training of many academic neurosurgeons and department chairmen.

Improvement in clinical outcomes following optimal targeting of brain ventricular catheters with intraoperative imaging.

Object: The accurate placement of cerebral ventricular shunt catheters in hydrocephalus is an important clinical problem. Malfunction of shunts remains their most common complication and greatest liability, and the influence of catheter position on shunt function remains poorly defined. The objectives of this study were as follows: 1) determine the accuracy of intraventricular catheter placement with respect to a historically favored target, defined as a 1-cm radius sphere at the anterior lip of the ipsilateral foramen of Monro; 2) confirm that this target represents a satisfactory site for frontal and occipital catheter placement by examining whether inaccuracy is associated with more shunt failures; and 3) determine whether catheter trajectory, use of image confirmation, or other factors are associated with either the accuracy or the longevity of shunts.

A multicenter, single-blind, prospective randomized trial to evaluate the safety of a polyethylene glycol hydrogel (Duraseal Dural Sealant System) as a dural sealant in cranial surgery.

Objective: Incisional cerebrospinal fluid (CSF) leakage after cranial surgery is a significant cause of morbidity due to poor wound healing and infection, meningitis, and pseudomeningocele formation. Many common dural closure techniques, such as sutures, autologous grafts, gelatin or collagen sponges, and fibrin glues, are used to achieve watertight closure, although none are US Food and Drug Administration approved for this use. DuraSeal Dural Sealant System is a polyethylene glycol (PEG) hydrogel approved by the U.