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https://www.readbyqxmd.com/read/28186475/programmable-shunt-valve-interactions-with-osseointegrated-hearing-devices
#1
Matthew J Pierson, Daniel Wehrmann, J Andrew Albers, Najib E El Tecle, Dary Costa, Samer K Elbabaa
OBJECTIVE Patients with ventriculoperitoneal (VP) shunts with programmable valves who would benefit from osseointegrated hearing devices (OIHDs) represent a unique population. The aim of this study was to evaluate the magnetic field strengths of 4 OIHDs and their interactions with 5 programmable VP shunt valves. METHODS Magnetic field strength was measured as a function of distance for each hearing device (Cochlear Baha 5, Cochlear Baha BP110, Oticon Ponto Plus Power, and Medtronic Sophono) in the following modes: inactive, active in quiet, and active in 60 decibels of background noise in the sound booth...
February 10, 2017: Journal of Neurosurgery. Pediatrics
https://www.readbyqxmd.com/read/28048781/su-f-t-141-proton-dose-validation-in-a-phantom-beyond-trufill-n-bca-embolization-glue
#2
A Mandapaka, A Ghebremedhin, B Patyal, Loma Linda
PURPOSE: To validate the treatment planning system predicted proton dose beyond a heterogeneity (n-BCA glue) by making a measurement in a custom acrylic phantom. METHODS: A custom cubic acrylic phantom was designed for this experiment. A container was designed to fit in the phantom. This container was filled with TRUFILL™ n-Butyl Cyanoacrylate(n-BCA) glue. When the container was placed in the phantom, its center was at a distance of 7.4cm from the entrance. This depth allows us to make measurements around the center of modulation of a 126 MeV proton beam with a 3cm spread-out-Bragg peak...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048545/we-de-207a-04-advances-in-radiological-neuro-endovascular-interventional-imaging
#3
S Rudin
: 1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28048454/we-de-207a-00-advances-in-image-guided-neurointerventions-clinical-pull-and-technology-push
#4
Jeffrey Siewerdsen, Rebecca Fahrig
: 1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047800/we-de-207a-01-parallels-in-the-evolution-of-x-ray-angiographic-systems-and-devices-used-for-minimally-invasive-endovascular-therapy
#5
C Strother
: 1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28047144/we-de-207a-02-advances-in-cone-beam-ct-anatomical-and-functional-imaging-in-angio-suite-to-enable-one-stop-shop-stroke-imaging-workflow
#6
G Chen
: 1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28046482/we-de-207a-03-recent-advances-in-devices-used-in-neuro-interventions
#7
M Gounis
: 1. Parallels in the evolution of x-ray angiographic systems and devices used for minimally invasive endovascular therapy Charles Strother - DSA, invented by Dr. Charles Mistretta at UW-Madison, was the technology which enabled the development of minimally invasive endovascular procedures. As DSA became widely available and the potential benefits for accessing the cerebral vasculature from an endovascular approach began to be apparent, industry began efforts to develop tools for use in these procedures...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/27857929/shunt-overdrainage-caused-by-displacement-of-the-pressure-control-cam-after-pressure-adjustment
#8
Su-Ho Kim, Yoon-Soo Lee, Min-Seok Lee, Sang-Jun Suh, Jeong-Ho Lee, Dong-Gee Kang
Although the Codman-Hakim programmable valve is one of most popular shunt systems used in the clinical practice for the treatment of hydrocephalus, malfunctions related with this system have been also reported which lead to underdrainage or overdrainage of the cerebrospinal fluid. While obstruction of the ventricular catheter by tissue materials or hematoma and catheter disconnection are relatively common, the malfunction of the valve itself is rare. Herein, we report on a rare case of shunt overdrainage caused by displacement of the pressure control cam after pressure adjustment...
October 2016: Korean Journal of Neurotrauma
https://www.readbyqxmd.com/read/27795454/the-autobiographical-i-shoulder-i-of-ernest-amory-codman-crafting-medical-meaning-in-the-twentieth-century
#9
Caitjan Gainty
This essay offers a reconsideration of the historical significance of Ernest Amory Codman's autobiographical preface to his 1934 text The Shoulder, Rupture of the Supraspinatus Tendon and Other Lesions on or about the Subacromial Bursa and its reception, in its own time and at the end of the twentieth century. It concentrates on the aesthetics of identity and the ways in which these are woven into the political, professional, and cultural contexts of these two periods. It argues finally that Codman's style of life writing, both in the autobiography and throughout his texts, served as an important historical actor that more generally demonstrates the possibilities in approaching the history of medicine from aesthetic angles...
2016: Bulletin of the History of Medicine
https://www.readbyqxmd.com/read/27767242/solubility-and-stability-of-baclofen-3-mg-ml-intrathecal-formulation-and-its-compatibility-with-implantable-programmable-intrathecal-infusion-systems
#10
Baohua Yue, Ron Brendel, Amelia Lukitsch, Thomas Prentice, Brian Doty
BACKGROUND: Commercial baclofen formulations used with infusion pumps are available at therapeutic concentrations of 0.5-2.0 mg/mL. However, patients who receive higher daily doses of baclofen may benefit from products with greater baclofen concentrations since their refill frequency would be reduced (up to a maximum of 180 days). We evaluated baclofen solubility, baclofen 3 mg/mL intrathecal (IT) formulation stability, and chemical and physical compatibility with Medtronic SynchroMed(®) II and Codman Medstream(®) programmable IT infusion pumps...
October 21, 2016: Neuromodulation: Journal of the International Neuromodulation Society
https://www.readbyqxmd.com/read/27751554/safety-and-efficacy-of-minimally-invasive-surgery-plus-alteplase-in-intracerebral-haemorrhage-evacuation-mistie-a-randomised-controlled-open-label-phase-2-trial
#11
Daniel F Hanley, Richard E Thompson, John Muschelli, Michael Rosenblum, Nichol McBee, Karen Lane, Amanda J Bistran-Hall, Steven W Mayo, Penelope Keyl, Dheeraj Gandhi, Tim C Morgan, Natalie Ullman, W Andrew Mould, J Ricardo Carhuapoma, Carlos Kase, Wendy Ziai, Carol B Thompson, Gayane Yenokyan, Emily Huang, William C Broaddus, R Scott Graham, E Francois Aldrich, Robert Dodd, Cristanne Wijman, Jean-Louis Caron, Judy Huang, Paul Camarata, A David Mendelow, Barbara Gregson, Scott Janis, Paul Vespa, Neil Martin, Issam Awad, Mario Zuccarello
BACKGROUND: Craniotomy, according to the results from trials, does not improve functional outcome after intracerebral haemorrhage. Whether minimally invasive catheter evacuation followed by thrombolysis for clot removal is safe and can achieve a good functional outcome is not known. We investigated the safety and efficacy of alteplase, a recombinant tissue plasminogen activator, in combination with minimally invasive surgery (MIS) in patients with intracerebral haemorrhage. METHODS: MISTIE was an open-label, phase 2 trial that was done in 26 hospitals in the USA, Canada, the UK, and Germany...
November 2016: Lancet Neurology
https://www.readbyqxmd.com/read/27743248/use-of-the-brainlab-disposable-stylet-for-endoscope-and-peel-away-navigation
#12
Jane Halliday, Ian Kamaly
BACKGROUND: Neuronavigation, the ability to perform real-time intra-operative guidance during cranial and/or spinal surgery, has increased both accuracy and safety in neurosurgery [2]. Cranial navigation of existing surgical instruments using Brainlab requires the use of an instrument adapter and clamp, which in our experience renders an endoscope 'top-heavy', difficult to manipulate, and the process of registration of the adapter quite time-consuming. METHODS: A Brainlab Disposable Stylet was used to navigate fenestration of an entrapped temporal horn in a pediatric case...
October 14, 2016: Acta Neurochirurgica
https://www.readbyqxmd.com/read/27487559/evaluation-of-efficacy-and-biocompatibility-of-a-new-absorbable-synthetic-substitute-as-a-dural-onlay-graft-in-a-large-animal-model
#13
Kunxue Deng, Xun Ye, Yaya Yang, Man Liu, Ali Ayyad, Yuanli Zhao, Yuyu Yuan, Jizong Zhao, Tao Xu
BACKGROUND: Numerous dura substitutes are commercially available, but no absorbable synthetic dura repair product has been used for both onlay and suture applications. OBJECTIVE: The safety and effectiveness of a new absorbable synthetic substitute composed of Poly-L-lactide microfibers as onlay dural graft were evaluated. METHODS: Physical properties and performance of the microfibrous synthetic dural substitute implanted as an onlay or suturable grafts were compared with these commercial products, including CODMAN ETHISORB™ Dura Patch and DuraGen™ Dural Graft Matrix, in a canine duraplasty model...
September 2016: Neurological Research
https://www.readbyqxmd.com/read/27476923/impact-of-magnetic-field-on-pressures-of-programmable-cerebrospinal-fluid-shunts-an-experimental-study
#14
İdiris Altun, Zafer Yüksel, Tufan Mert
AIM: To investigate whether programmable CSF shunts are influenced by exposure to the magnetic field and to compare the effects of magnetic field in 4 different brands of programmable CSF shunts. MATERIAL AND METHODS: This experimental study was performed in the laboratory using a novel design of magnetic field. Four types of programmable CSF shunts (Miethke®, Medtronic®, Sophysa® and Codman®Hakim®) were exposed to the magnetic field generated by an apparatus consisting of Helmholtz coil for 5 minutes...
April 25, 2016: Turkish Neurosurgery
https://www.readbyqxmd.com/read/27359280/surface-aneurysmal-bone-cyst-clinical-and-imaging-features-in-10-new-cases
#15
Merter Yalcinkaya, Osman Lapcin, Yavuz Arikan, Osman Emre Aycan, Devrim Ozer, Yavuz Selim Kabukcuoglu
Aneurysmal bone cyst originating from the surface of the bone, either within the cortex or subperiosteally, is an uncommon anatomic subtype. This article reports the clinical and radiologic evaluations and treatment outcomes of 10 patients with surface aneurysmal bone cysts that were surgically treated between 1982 and 2014. Mean age at the time of surgery was 22.4 years (range, 11-44 years). According to Capanna's radiographic evaluation criteria, 6 of the lesions were classified as type V and 4 were classified as type IV...
September 1, 2016: Orthopedics
https://www.readbyqxmd.com/read/27195449/has-the-introduction-of-antibiotic-impregnated-external-ventricular-drain-catheters-changed-the-nature-of-the-microorganisms-cultured-in-patients-with-drain-related-infection-a-single-neurosurgical-centre-s-experience
#16
S Talibi, A Tarnaris, S A Shaw
BACKGROUND: The introduction of antibiotic-impregnated catheters (AICs) has significantly reduced external ventricular drain (EVD) infection rates, inhibiting in particular Gram-positive microbial infection. There is a theoretical increased risk of selection of resistant and Gram-negative microorganisms. The aim of this study is to look at the impact of the introduction of AICs on microorganism susceptibility of infected EVDs and to determine whether the use of such devices results in shift from Gram-positive to Gram-negative microorganisms...
October 2016: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/27189029/ernest-codman-and-the-end-result-system-a-pioneer-of-health-outcomes-revisited
#17
Joel Howell, John Ayanian
No abstract text is available yet for this article.
October 2016: Journal of Health Services Research & Policy
https://www.readbyqxmd.com/read/27165930/measurement-of-intraspinal-pressure-after-spinal-cord-injury-technical-note-from-the-injured-spinal-cord-pressure-evaluation-study
#18
Melissa C Werndle, Samira Saadoun, Isaac Phang, Marek Czosnyka, Georgios Varsos, Zofia Czosnyka, Peter Smielewski, Ali Jamous, B Anthony Bell, Argyro Zoumprouli, Marios C Papadopoulos
Intracranial pressure (ICP) is routinely measured in patients with severe traumatic brain injury (TBI). We describe a novel technique that allowed us to monitor intraspinal pressure (ISP) at the injury site in 14 patients who had severe acute traumatic spinal cord injury (TSCI), analogous to monitoring ICP after brain injury. A Codman probe was inserted subdurally to measure the pressure of the injured spinal cord compressed against the surrounding dura. Our key finding is that it is feasible and safe to monitor ISP for up to a week in patients after TSCI, starting within 72 h of the injury...
2016: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/27165900/change-in-pulsatile-cerebral-arterial-pressure-and-flow-waves-as-a-therapeutic-strategy
#19
Mi Ok Kim, Audrey Adji, Michael F O'Rourke, Alberto P Avolio, Peter Smielewski, John D Pickard, Marek Czosnyka
While intracranial pressure (ICP), arterial pressure and transcranial middle cerebral artery flow velocity (MCAFV) are often monitored in unconscious patients following stroke or head injury, the value of waveform indices has not been fully established. We retrospectively analysed the data of eight adults (aged 19-36 years) with closed head injury who had spontaneous and repeated episodes of elevated ICP (i.e. "plateau waves"). MCAFV was measured using transcranial Doppler, ICP using a Codman catheter and radial artery pressure using cannulation...
2016: Acta Neurochirurgica. Supplement
https://www.readbyqxmd.com/read/27165885/validation-of-a-new-minimally-invasive-intracranial-pressure-monitoring-method-by-direct-comparison-with-an-invasive-technique
#20
Gustavo Henrique Frigieri Vilela, Brenno Cabella, Sérgio Mascarenhas, Marek Czosnyka, Peter Smielewski, Celeste Dias, Danilo Augusto Cardim, Yvonne Maria Mascarenhas, Charles Chenwei Wang, Rodrigo Andrade, Koji Tanaka, Luiza Silva Lopes, Benedicto Oscar Colli
In this chapter we present in vivo experiments with a new minimally invasive method of monitoring intracranial pressure (ICP). Strain gauge deformation sensors are externally glued onto the exposed skull. The signal from these sensors is amplified, filtered, and sent to a computer with appropriate software for analysis and data storage. Saline infusions into the spinal channel of rats were performed to produce ICP changes, and minimally invasive ICP and direct Codman intraparenchymal ICP were simultaneously acquired in six animals...
2016: Acta Neurochirurgica. Supplement
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