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Richard P. Menger, Piyush Kalakoti, Andrew J. Pugely, Anil Nanda and Anthony Sin

initial hospitalization is critical to the delivery of pediatric spinal care. To our knowledge, a comprehensive analysis has not previously been performed of the modifiable and nonmodifiable risk factors associated with the outcomes of initial hospitalization in adolescent patients undergoing deformity correction for idiopathic scoliosis using a large administrative cohort. Further, a thorough assessment of the effect of hospital surgical volume on outcomes is needed for AIS surgery. In the present study, we seek to evaluate hospital and patient factors related to

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Piyush Kalakoti, Osama Ahmed, Papireddy Bollam, Symeon Missios, Jessica Wilden and Anil Nanda

a diversity of practice settings, we used the National (Nationwide) Inpatient Sample (NIS), a prospective hospital discharge database representing a random, validated sample of all inpatient admissions to nonfederal hospitals in the US. We identified independent predictors associated with adverse short-term outcomes in patients undergoing DBS procedures for 3 primary movement disorders: essential tremor, PD, and dystonia. Additionally, we investigated the effect of hospital caseload volume on outcomes following DBS. To our knowledge, this study provides the latest

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Piyush Kalakoti, Symeon Missios, Richard Menger, Sunil Kukreja, Subhas Konar and Anil Nanda

across the United States. Using this database, we identified independent associations of patient- and hospital-related characteristics with inpatient outcomes in patients who underwent resection for benign intradural spinal tumors. In addition, we explored the effect of hospital case volume on inpatient outcomes after resection of intradural spine tumors. Methods Data Source The NIS, the largest publicly available all-payer database, developed for the Healthcare Cost and Utilization Project (HCUP) by the Agency of Healthcare Research and Quality in Rockville

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Mayur Sharma, Ashish Sonig, Sudheer Ambekar and Anil Nanda

, South, or West); hospital location (rural or urban); teaching status; hospital size by number of beds (small, medium, or large); and hospital control (government, private nonprofit, private, and investor owned)—these variables were recoded into government and private for the analysis. The annual number of cases at each hospital (hospital volume) was calculated using the hospital identification number (HOSPID). Percentiles were calculated and hospitals in which the number of cases was greater than the 90th percentile were categorized into high-volume centers. Such high-volume

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Venkatesh S. Madhugiri, Sudheer Ambekar, Shane F. Strom and Anil Nanda

T he number of scientific publications over a period of time is generally considered to be an indicator of the quantity of research output during that period. The volume of scientific literature continues to double about every 7 years or so, 14 despite earlier predictions that beyond the 1950s, the rate of scientific publication would stabilize. 9 In the year 2008, approximately 1,350,000 articles were published in peer-reviewed journals. 2 The 2012 National Library of Medicine (NLM) Catalog contains 14,417 serial titles ( http

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Amitabha Chanda, Donald R. Smith and Anil Nanda

the cell saver autotransfusion in progress. A: Blood is being collected into a reservoir through suction tube in surgical field. B: Blood is transferred to a spinning bowl mounted on a centrifuge to undergo centrifugation. C: Blood is siphoned into a collection bag. D: Blood is finally collected in the transfusion bag. Intraoperative blood loss was determined by the measurement of the volume of salvaged blood in the cell saver combined with EBL in sponges and drapes. The necessity of transfusion was decided jointly by the surgeon and the anesthesiologist based

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Richard P. Menger, Jai Deep Thakur, Gary Jain and Anil Nanda

possible delay to full return to the workforce. Reform needs to focus on the delicate balance between access and cost. Procedure Type Spinal instrumentation surgery has been increasing; intuitively, it makes sense for insurance companies to target high-volume, high-cost procedures with varying results. Medicare payments for spinal surgery doubled from 1992 to 2003, with the rate of lumbar fusion increasing 500%. 27 The economic data are mixed. In the long-term, delaying instrumentation surgery in the preauthorization stage may not benefit an expedited return to the

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Rimal Hanif Dossani, John Shaughnessy, Piyush Kalakoti and Anil Nanda

World War II. Pupils of the Gallie course were awarded membership in the “Gallie Club,” a group that met once a year on his birthday “for intellectual stimulus and good fellowship.” In 1947, when Gallie retired from the position of Chair at University of Toronto, his colleagues and students presented him with a volume of 52 surgical essays. Published by the University of Toronto Press, the essays were a reflection of “the practice of surgery in the Toronto school and the influence which Dr. Gallie has wielded upon Canadian surgery.” 12 In Dr. Gallie’s words, the

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David E. Connor Jr., Menarvia Nixon, Anil Nanda and Bharat Guthikonda

been shown to be far more numerous than the previous 2 classes of data, if not as immediately clinically relevant. These 11 publications demonstrate consistently positive results with continued application of VNS to increasingly diverse populations. Of all of the studies reviewed, these represented, by far, the largest data set in terms of cumulative patients evaluated. This volume of information has been used to establish trends in outcome not otherwise evident in investigations with smaller sample sizes. Focal epileptogenic foci and the presence of cortical

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Lixin Huang, Maheshkumar P. Mehta, Anil Nanda and John H. Zhang

metabolism and intracranial pressure in severely brain injured patients. J Neurosurg 94 : 403 – 411 , 2001 Rockswold SB, Rockswold GL, Vargo JM, et al: Effects of hyperbaric oxygenation therapy on cerebral metabolism and intracranial pressure in severely brain injured patients. J Neurosurg 94: 403–411, 2001 46. Sunami K , Takeda Y , Hashimoto M , et al : Hyperbaric oxygen reduces infarct volume in rats by increasing oxygen supply to the ischemic periphery. Crit Care Med 28 : 2831 – 2836 , 2000 Sunami K