Contributions of Laurent Princeteau to Trigeminal Neuralgia and Middle Fossa Anatomy: More than a Mere Tubercle.

The contributions of Laurent Princeteau (1858-1932) to anatomy and to the establishment of neurosurgery have largely gone unrecognized, perhaps because he was educated and practiced in a French city other than Paris at a time when Paris was one of the chief centers of medicine in Europe. After completing a thesis describing an iliac artery anomaly and obtaining the distinguished agrégé teaching degree, Princeteau began his surgical career at the University of Bordeaux. Within 10 years, he became chef de clinique and one of the busiest surgeons in Saint-André Hospital, as well as head of the anatomy institute and professor of anatomy at the dental school. In 1891, he achieved the rank of surgeon. In the field of general anatomy, he was recognized for novel cadaveric preparations and vascular perfusion techniques. In the neurosciences, he made important contributions to the anatomy of the trigeminal nerve and trigeminal neuralgia. In 1898, Princeteau supervised a thesis that addressed contemporary surgical approaches to the trigeminal complex. In the course of this effort, he identified a bony prominence near the petrous apex (the retrogasserian tubercle) that helped to locate the gasserian ganglion. The surgical significance of the retrogasserian tubercle was quickly acknowledged in the European neurosurgical community and was noted in French textbooks of anatomy. Thierry de Martel, a founding member of the French neurosurgical School, named the tubercle after Princeteau. To the rest of the world, however, it remained almost unknown.

Biomarkers and sustainable innovation in cardiovascular drug development: lessons from near and far afield.

Future innovative therapies targeting cardiovascular disease (CVD) have the potential to improve health outcomes and to contain rising healthcare costs. Unsustainable increases in the size, cost and duration of clinical trial programs necessary for regulatory approval, however, threaten the entire innovation enterprise. Rising costs for clinical trials are due in large part to increasing demands for hard cardiovascular clinical endpoints as measures of therapeutic efficacy. The development and validation of predictive and surrogate biomarkers, as laboratory or other objective measures predictive or reflective of clinical endpoints, are an important part of the solution to this challenge. This review will discuss insights applicable to CVD derived from the use of predictive biomarkers in oncologic drug development, the evolving role of high density lipoprotein (HDL) in CVD drug development and the impact biomarkers and surrogates have on the continued investment from multiple societal sources critical for innovative CVD drug discovery and development.

A Prospective Randomized Controlled Pilot Simulation Study to Investigate the Effect of Audiovisual Decision Support on Diagnosis and Therapeutic Interventions.

INTRODUCTION: Combining audiovisual decision support during perioperative critical events might enhance provider diagnostic and therapeutic accuracy and efficiency. METHODS: This study is a prospective, randomized controlled pilot trial studying the impact of audiovisual decision support on anesthesia professional performance at NorthShore University HealthSystem's high fidelity simulation center. Twenty anesthesia professionals (>2 years of clinical experience in the current role) were randomized to 2 groups (current care model vs. audiovisual assistance) and underwent 3 periprocedural simulation scenarios, where patient deterioration occurs: anaphylaxis, amniotic fluid embolism, and cardiac arrest during dental case. RESULTS: Overall, there was a statistically significant decrease in the mean and median pooled times to diagnosis in both the amniotic fluid embolism and pediatric dental scenarios. There was a statistically significant increase in the number of participants in the intervention group who made diagnosis 3 before the end of the scene (P = 0.03) in the amniotic fluid embolism case. In the pediatric dental case, there was a statistically significant reduction in the median time to diagnosis 1 and diagnosis 3 in the intervention group versus control (P = 0.01 and P = 0.0002). A significant increase in the number of participants in the intervention group versus control made the correct diagnosis 2 before vital sign change 3 (P = 0.03), and more participants in the intervention group made the correct diagnosis 3 before the end of the scene when compared with control (P = 0.001). The median time to start intervention 2 during the dental case was statistically significantly greater in the intervention group versus the control (P = 0.05). All other endpoints were not statistically significant among the 3 simulation scenarios. Six questions were answered by all participants upon immediate completion of the simulation scenarios and revealed that 19 of 20 participants had delivered anesthesia care to patients similar to the 3 simulation scenarios and 18 of 20 participants reported that they would prefer audiovisual assistance to detect abnormalities in vital signs that subsequently provides appropriate diagnostic and therapeutic options. CONCLUSIONS: This pilot study suggested some significant improvement in anesthesia professional time to correct diagnosis and completion of identification of the correct diagnosis before the next vital change in the audiovisual cue group versus control, particularly in the outpatient dental case. In addition, the mean and median pooled times to diagnosis were significantly reduced by approximately 1 minute in both evaluated simulation scenarios. The postsimulation survey responses also suggest the desirability of an audiovisual decision support tool among the current anesthesia professional participants. However, overall, there were no significant differences in the time to intervention between groups in all simulation scenarios.

Intellectual Property Protection in Neurosurgery: An Overview.

This is the first article of a series that will cover strategies for the protection of neurosurgical inventions and devices through patent law. Advances in neurosurgical techniques have always been accompanied by advances in neurosurgical technology. Indeed, continuous technological innovation has been a characteristic of the profession. Intellectual property protection serves as an important incentive to innovation. The protection of intellectual property related to neurosurgery presents several issues that deserve careful consideration for neurosurgical innovation.

Consenting to the ineffable: the problem of neuromodulation and altered consciousness.

Both the therapeutic effects and the complications associated with neuromodulation of the brain can result in experiences that are neither reliably predictable nor easily describable. For this reason, protocols for informed consent must be carefully tailored to the procedure, the indication, and the patient, and satisfy very strict, often subjective patient standards of disclosure. These three elements can be combined to categorize procedures for neuromodulation (and as well as others) and optimize the protection of the patient.

Anatomy, technology, art, and culture: toward a realistic perspective of the brain.

In the 15th century, brain illustration began to change from a schematic system that involved scant objective rendering of the brain, to accurate depictions based on anatomical dissections that demanded significant artistic talent. Notable examples of this innovation are the drawings of Leonardo da Vinci (1498-1504), Andreas Vesalius' association with the bottega of Titian to produce the drawings of Vesalius' De humani corporis fabrica (1543), and Christopher Wren's illustrations for Thomas Willis' Cerebri Anatome (1664). These works appeared during the Renaissance and Age of Enlightenment, when advances in brain imaging, or really brain rendering, reflected not only the abilities and dedications of the artists, but also the influences of important cultural and scientific factors. Anatomy and human dissection became popular social phenomena as well as scholarly pursuits, linked with the world of the fine arts. The working philosophy of these artists involved active participation in both anatomical study and illustration, and the belief that their discoveries of the natural world could best be communicated by rendering them in objective form (that is, with realistic perspective). From their studies emerged the beginning of contemporary brain imaging. In this article, the authors examine how the brain began to be imaged in realism within a cultural and scientific milieu that witnessed the emergence of anatomical dissection, the geometry of linear perspective, and the closer confluence of art and science.

Travels to the tropics: Deutschtum and Fedor Krause's visits to Brazil.

Fedor Krause, the father of German neurosurgery, traveled to Latin America twice in the final years of his career (in 1920 and 1922). The associations and motivations for his travels to South America and his work there have not been well chronicled. In this paper, based on a review of historical official documents and publications, the authors describe Krause's activities in South America (focusing on Brazil) within the context of the Germanism doctrine and, most importantly, the professional enjoyment Krause reaped from his trips as well as his lasting influence on neurosurgery in South America. Fedor Krause's visits to Brazil occurred soon after World War I, when Germany sought to reestablish economic, political, cultural, and scientific power and influence. Science, particularly medicine, had been chosen as a field capable of meeting these needs. The advanced German system of academic organization and instruction, which included connections and collaborations with industry, was an optimal means to reestablish the economic viability of not only Germany but also Brazil. Krause, as a de facto ambassador, helped rebuild the German image and reconstruct diplomatic relations between Germany and Brazil. Krause's interactions during his visits helped put Brazilian neurosurgery on a firm foundation, and he left an indelible legacy of advancing professionalism and specialization in neurosurgery in Brazil.

Seven Ethical Issues Affecting Neurosurgeons in the Context of Health Care Reform.

Ethical discussions around health care reform typically focus on problems of social justice and health care equity. This review, in contrast, focuses on ethical issues of particular importance to neurosurgeons, especially with respect to potential changes in the physician-patient relationship that may occur in the context of health care reform.The Patient Protection and Affordable Care Act (ACA) of 2010 (H.R. 3590) was not the first attempt at health care reform in the United States but it is the one currently in force. Its ambitions include universal access to health care, a focus on population health, payment reform, and cost control. Each of these aims is complicated by a number of ethical challenges, of which 7 stand out because of their potential influence on patient care: the accountability of physicians and surgeons to individual patients; the effects of financial incentives on clinical judgment; the definition and management of conflicting interests; the duty to preserve patient autonomy in the face of protocolized care; problems in information exchange and communication; issues related to electronic health records and data security; and the appropriate use of "Big Data."Systematic social and economic reforms inevitably raise ethical concerns. While the ACA may have driven these 7 to particular prominence, they are actually generic. Nevertheless, they are immediately relevant to the practice of neurosurgery and likely to reflect the realities the profession will be obliged to confront in the pursuit of more efficient and more effective health care.

Neurosurgical Practice in Transition: A Review.

Neurosurgery is experiencing a period of acute change driven by 2 forces: (1) the perception that the healthcare system in the United States is wasteful and that patients are receiving low "value" care, (2) the belief that quality and long-term outcomes can be measured accurately. We believe 3 important shifts will emerge as a result of these forces. First, payment models will change. They will become anchored to a concept of population health, with capitation payments on a per-patient basis going to provider entities that undertake financial risk. Second, fee-for-service payments will be tied increasingly to administrative and clinical quality measures. Finally, out-of-pocket costs for patients will increase and affect both treatment decisions and willingness to participate in restrictive health care networks. In this review, we describe these changes and discuss possible consequences. We note the changing demographics of neurosurgical practices. Overall, independent private practices, managed by the neurosurgeons, will decline. The proportion of fee-for-service cases will decrease while cases reimbursed through capitation will increase. Physician integration with provider organizations, whether via full employment, a "lease," or some other arrangement, will also increase. We note the increasing importance of quality measures, and how they are likely to affect neurosurgical practices and reimbursement. We describe the advantages and disadvantages of fee-for-service and population health; describe opportunities and risks arising from these transitions; and outline strategies to thrive in a changing environment.