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https://www.readbyqxmd.com/read/29906932/constitutive-relation-for-the-system-spanning-dynamically-jammed-region-in-response-to-impact-of-cornstarch-and-water-suspensions
#1
Rijan Maharjan, Shomeek Mukhopadhyay, Benjamin Allen, Tobias Storz, Eric Brown
We experimentally characterize the impact response of concentrated suspensions consisting of cornstarch and water. We observe that the suspensions support a large normal stress-on the order of MPa-with a delay after the impactor hits the suspension surface. We show that neither the delay nor the magnitude of the stress can yet be explained by either standard rheological models of shear thickening in terms of steady-state viscosities, or impact models based on added mass or other inertial effects. The stress increase occurs when a dynamically jammed region of the suspension in front of the impactor propagates to the opposite boundary of the container, which can support large stresses when it spans between solid boundaries...
May 2018: Physical Review. E
https://www.readbyqxmd.com/read/29906931/system-spanning-dynamically-jammed-region-in-response-to-impact-of-cornstarch-and-water-suspensions
#2
Benjamin Allen, Benjamin Sokol, Shomeek Mukhopadhyay, Rijan Maharjan, Eric Brown
We experimentally characterize the structure of concentrated suspensions of cornstarch and water in response to impact. Using surface imaging and particle tracking at the boundary opposite the impactor, we observed that a visible structure and particle flow at the boundary occur with a delay after impact. We show the delay time is about the same time as the strong stress response, confirming that the strong stress response results from deformation of the dynamically jammed structure once it spans between the impactor and a solid boundary...
May 2018: Physical Review. E
https://www.readbyqxmd.com/read/29899478/deterministic-quantum-state-transfer-and-remote-entanglement-using-microwave-photons
#3
P Kurpiers, P Magnard, T Walter, B Royer, M Pechal, J Heinsoo, Y Salathé, A Akin, S Storz, J-C Besse, S Gasparinetti, A Blais, A Wallraff
Sharing information coherently between nodes of a quantum network is fundamental to distributed quantum information processing. In this scheme, the computation is divided into subroutines and performed on several smaller quantum registers that are connected by classical and quantum channels 1 . A direct quantum channel, which connects nodes deterministically rather than probabilistically, achieves larger entanglement rates between nodes and is advantageous for distributed fault-tolerant quantum computation 2 ...
June 2018: Nature
https://www.readbyqxmd.com/read/29869701/single-use-versus-reusable-ureterorenoscopes-for-retrograde-intrarenal-surgery-rirs-systematic-comparative-analysis-of-physical-and-optical-properties-in-three-different-devices
#4
Susanne Deininger, Luis Haberstock, Stephan Kruck, Eva Neumann, Ines Anselmo da Costa, Tilman Todenhöfer, Jens Bedke, Arnulf Stenzl, Steffen Rausch
INTRODUCTION: Retrograde intrarenal surgery (RIRS) represents a standard option for kidney stone removal. However, RIRS is considered a cost-intensive procedure. Single-use flexible ureterorenoscopes have been introduced to improve budget predictability in RIRS. We assessed differences in physical and optical properties of single-use devices compared to standard reusable endoscopes. METHODS: In two single-use (LithoVue™, Boston Scientific; Pusen Uscope UE3011™), and one reusable ureterorenoscope (Flex-Xc™, Karl Storz), we investigated flow rates, deflection, illuminance, and intrapelvic pressure in a porcine kidney model...
June 5, 2018: World Journal of Urology
https://www.readbyqxmd.com/read/29860870/the-endockscope-using-next-generation-smartphones-a-global-opportunity
#5
Christina Tse, Roshan M Patel, Renai Yoon, Zhamshid Okhunov, Jaime Landman, Ralph V Clayman
INTRODUCTION: The Endockscope combines a smartphone, a battery powered flashlight and a fiberoptic cystoscope allowing for mobile videocystoscopy. We compared conventional videocystoscopy to the Endockscope paired with next generation smartphones in an ex-vivo porcine bladder model to evaluate its image quality. MATERIALS AND METHODS: The Endockscope consists of a three-dimensional (3D) printed attachment that connects a smartphone to a flexible fiberoptic cystoscope plus a 1000 lumen light-emitting diode (LED) cordless light source...
June 2, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29780827/sentinel-lymph-node-biopsy-in-breast-cancer-patients-by-means-of-indocyanine-green-using-the-karl-storz-vitom%C3%A2-fluorescence-camera
#6
Thomas Papathemelis, Evi Jablonski, Anton Scharl, Tanja Hauzenberger, Michael Gerken, Monika Klinkhammer-Schalke, Matthias Hipp, Sophia Scharl
Currently, the use of radioisotope and blue dye for sentinel lymph node biopsy (SLNB) for axillary staging in breast cancer is common. Recently, indocyanine green (ICG) has been proposed as an alternative sentinel lymph node (SLN) tracking agent. We evaluated the clinical value of ICG as an additional tracer in combination with Technetium99m and as an alternative to Technetium99m for the identification of SLN in 104 breast cancer patients. 21 patients had at least 1 histologically tumor-positive SLN. All 21 patients were detected by ICG; in one of these 21 sentinel-positive patients, Technetium99m was unable to identify lymph node involvement...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29774810/procedural-module-flexible-cystoscopy
#7
Shoaib Safiullah, Daniel J Lama, Roshan Patel, Ralph V Clayman
INTRODUCTION: Cystoscopy is a basic urologic skill necessary for the endoscopic evaluation of the urethra and bladder. Presented is a step-by-step guide for flexible cystoscopy of the male and female patient. MATERIALS/METHODS: Routine flexible cystoscopy was performed on a male patient with a history of upper tract urothelial carcinoma and a female patient as part of a hematuria evaluation. The male patient was positioned supine, and the female patient frog-leg supine...
May 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29737199/steep-infundibulopelvic-angle-ipa-as-a-new-risk-factor-for-flexible-ureteroscope-damage-and-complicated-postoperative-course
#8
Tomasz Ozimek, Jens Cordes, Judith Riccarda Wiessmeyer, Michael Heribert Schneider, Marie Christine Hupe, Nils Gilbert, Axel Stuart Merseburger, Mario Wolfgang Kramer
OBJECTIVE: The increasing number of flexible ureteroscopy (fURS) procedures, the fragility of devices and their growing repair costs represent a substantial burden for urological departments worldwide. No risk factors of flexible ureteroscope damage have been identified so far. The objective of this study was to investigate the impact of infundibulopelvic angle (IPA) on device damage and on other intra- and postoperative factors such as length of hospital stay (LOS), surgical complications, stone-free rate (SFR), operation and fluoroscopy time...
May 8, 2018: Journal of Endourology
https://www.readbyqxmd.com/read/29733796/comparison-of-ureteroscopic-pneumatic-lithotripsy-and-extracorporeal-shock-wave-lithotripsy-for-the-management-of-proximal-ureteral-stones-a-single-center-experience
#9
Nadeem Iqbal, Yashfeen Malik, Utbah Nadeem, Maham Khalid, Amna Pirzada, Mehr Majeed, Hajra Arshad Malik, Saeed Akhter
OBJECTIVE: To evaluate and compare the effectiveness of ureteroscopic (URS) pneumatic lithotripsy versus extracorporeal shock wave lithotripsy (ESWL) in the management of the proximal ureteral stones in terms of stone- free rates, complications and costs involved. MATERIAL AND METHODS: We included 200 patients in Group 1 who underwent ESWL and 200 patients in Group 2 who underwent URS intervention. We used Modulith SL X lithotripter 3rd generation Storz medical for ESWL group while Swiss pneumatic lithoclast was used to break the stone in the URS group...
May 2018: Turkish Journal of Urology
https://www.readbyqxmd.com/read/29716611/evaluation-of-self-educational-training-methods-to-learn-laparoscopic-skills-a-randomized-controlled-trial
#10
Steffen Axt, Pirmin Storz, Carolin Ehrenberg, Claudius Falch, Marc Immenroth, Andreas Kirschniak, Sven Muller
BACKGROUND: Evaluation of two different self-educational methods (video assisted learning versus video assisted learning plus a nodal point operation primer) on learning laparoscopic suturing and intracorporal knotting. METHODS: Randomized controlled trial at the laparoscopic surgical training center, University of Tubingen with 45 surgical novices first year medical students being pretested for dexterity. After self-educational training for 90 min with either method (Group A: video assisted learning, Group B: video assisted learning plus a nodal point operation primer) participants had to perform five laparoscopic intracorporal knots...
May 2, 2018: BMC Medical Education
https://www.readbyqxmd.com/read/29713886/comparison-of-narrow-band-imaging-and-the-storz-professional-image-enhancement-system-for-detection-of-laryngeal-and-hypopharyngeal-pathologies
#11
L Staníková, R Walderová, D Jančatová, M Formánek, K Zeleník, Pavel Komínek
OBJECTIVE: The aim of this study was to compare narrow band imaging (NBI) endoscopy and Storz Professional Image Enhancement System (SPIES) in observing epithelial and/or subepithelial microvascular irregularities and pathologies. METHODS: A total of 73 patients with laryngeal or hypopharyngeal lesions were investigated using high-definition NBI endoscopy preoperatively in local anesthesia and using SPIES system intraoperatively in general anesthesia from August 2016 to October 2017...
April 30, 2018: European Archives of Oto-rhino-laryngology
https://www.readbyqxmd.com/read/29693949/analysis-of-preoperative-airway-examination-with-the-cmos-video-rhino-laryngoscope
#12
Masanori Tsukamoto, Takashi Hitosugi, Takeshi Yokoyama
BACKGROUND: Endoscopy is one of the most useful clinical techniques in difficult airway management Comparing with the fibroptic endoscope, this compact device is easy to operate and can provide the clear image. In this study, we investigated its usefulness in the preoperative examination of endoscopy. METHODS: Patients undergoing oral maxillofacial surgery were enrolled in this study. We performed preoperative airway examination by electronic endoscope (The CMOS video rhino-laryngoscope, KARL STORZ Endoscopy Japan, Tokyo)...
May 2017: Masui. the Japanese Journal of Anesthesiology
https://www.readbyqxmd.com/read/29662543/optical-improvements-in-the-diagnosis-of-bladder-cancer-implications-for-clinical-practice
#13
REVIEW
Tina Schubert, Steffen Rausch, Omar Fahmy, Georgios Gakis, Arnulf Stenzl
Background: For over 100 years white-light cystoscopy has remained the gold-standard technique for the detection of bladder cancer (BCa). Some limitations in the detection of flat lesions (CIS), the differentiation between inflammation and malignancy, the inaccurate determination of the tumor margin status as well as the tumor depth, have led to a variety of technological improvements. The aim of this review is to evaluate the impact of these improvements in the diagnosis of BCa and their effectiveness in clinical practice...
November 2017: Therapeutic Advances in Urology
https://www.readbyqxmd.com/read/29658780/inter-and-intra-observer-variability-of-an-anatomical-landmark-based-manual-segmentation-method-by-mri-for-the-assessment-of-skeletal-muscle-fat-content-and-area-in-subjects-from-the-general-population
#14
Lena Sophie Kiefer, Jana Fabian, Roberto Lorbeer, Jürgen Machann, Corinna Storz, Mareen Sarah Kraus, Elke Wintermeyer, Christopher Schlett, Frank Roemer, Konstantin Nikolaou, Annette Peters, Fabian Bamberg
OBJECTIVES: Changes in skeletal muscle composition, such as fat content and mass, may exert unique metabolic and musculoskeletal risks; however, the reproducibility of their assessment is unknown. We determined the variability of the assessment of skeletal muscle fat content and area by MRI in a population-based sample. METHODS: A random sample from a prospective, community-based cohort study (KORA-FF4) was included. Skeletal muscle fat content was quantified as proton-density fat fraction (PDFF) and area as cross-sectional area (CSA) in multi-echo Dixon sequences (TR 8...
May 3, 2018: British Journal of Radiology
https://www.readbyqxmd.com/read/29628581/ease-of-intubation-with-c-mac-videolaryngoscope-use-of-60%C3%A2-angled-styletted-endotracheal-tube-versus-intubation-over-bougie
#15
Pulak Tosh, Sunil Rajan, Lakshmi Kumar
Background: Although videolaryngoscopes improve glottic visualization, their actual usefulness in intubation is not yet established. Aims: The primary objective was to compare the ease of oral intubation with the use of 60° angled styletted endotracheal tube versus that performed over bougie inserted under videolaryngoscopic guidance. The secondary objectives were assessment of incidence of airway loss, hemodynamic changes, and time and number of attempts at intubation...
January 2018: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/29628570/effect-of-c-mac-video-laryngoscope-aided-intubations-using-d-blade-on-incidence-and-severity-of-postoperative-sore-throat
#16
Pulak Tosh, Dilesh Kadapamannil, Sunil Rajan, Naina Narayani, Lakshmi Kumar
Background: Video laryngoscope-aided intubations require less force to align oral, pharyngeal, and laryngeal planes to visualize the glottis opening during intubation. Aim: The primary objective of the study was to assess the incidence and severity of postoperative sore throat (POST) in patients who were intubated with C-MAC video laryngoscope using D-blade versus traditional Macintosh laryngoscope. Settings and Design: This prospective, randomized, open label study was conducted in a tertiary care institution...
January 2018: Anesthesia, Essays and Researches
https://www.readbyqxmd.com/read/29616907/a-practical-guide-for-physicians-and-health-care-workers-to-reduce-their-carbon-footprint-in-daily-clinical-work
#17
Maximilian Andreas Storz
With Earth Overshoot Day having recently passed, there is no space for complacency regarding taking care of our planet. On August 2, 2017, humanity used nature's resource budget for the entire year. For decades, we have lived far beyond our means by overexploiting natural resources and spewing pollution, such as microplastics and industrial chemicals, into our environment. On the other hand, public awareness of human-induced climate change has also increased since the 1980s. The frequent media coverage about extreme weather conditions and natural disasters, such as Hurricane Irma in 2017, serves as an important reminder that anthropogenic climate change is happening now...
March 12, 2018: Permanente Journal
https://www.readbyqxmd.com/read/29608560/molecular-basis-of-hemoglobin-adaptation-in-the-high-flying-bar-headed-goose
#18
Chandrasekhar Natarajan, Agnieszka Jendroszek, Amit Kumar, Roy E Weber, Jeremy R H Tame, Angela Fago, Jay F Storz
During the adaptive evolution of a particular trait, some selectively fixed mutations may be directly causative and others may be purely compensatory. The relative contribution of these two classes of mutation to adaptive phenotypic evolution depends on the form and prevalence of mutational pleiotropy. To investigate the nature of adaptive substitutions and their pleiotropic effects, we used a protein engineering approach to characterize the molecular basis of hemoglobin (Hb) adaptation in the high-flying bar-headed goose (Anser indicus), a hypoxia-tolerant species renowned for its trans-Himalayan migratory flights...
April 2018: PLoS Genetics
https://www.readbyqxmd.com/read/29589051/-chemotherapy-induced-nausea-and-vomiting-current-recommendations-for-prophylaxis
#19
REVIEW
E Storz, J E Gschwend, M Retz
The chemotherapy-induced nausea and vomiting (CINV) is one of the most frequent side effects in cytostatic therapy and a profound challenge during the therapy of cancer patients. Therefore, standardized guideline-orientated prophylaxis is essential and a fundamental contribution for the success of treatment. This review summarizes the current recommendations for CINV of the Multinational Association of Supportive Care in Cancer (MASCC) and European Society of Medical Oncology (ESMO), the American Society for Clinical Oncology (ASCO), the National Comprehensive Cancer Network (NCCN) and the S3-guideline Supportive Therapie of the Leitlinienprogramm Onkologie and shall facilitate its use in the daily routine...
May 2018: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29581920/first-clinical-applications-of-a-high-definition-three-dimensional-exoscope-in-pediatric-neurosurgery
#20
Thomas Beez, Christopher Munoz-Bendix, Kerim Beseoglu, Hans-Jakob Steiger, Sebastian A Ahmadi
The ideal visualization tools in microneurosurgery should provide magnification, illumination, wide fields of view, ergonomics, and unobstructed access to the surgical field. The operative microscope was the predominant innovation in modern neurosurgery. Recently, a high-definition three-dimensional (3D) exoscope was developed. We describe the first applications in pediatric neurosurgery. The VITOM 3D exoscope (Karl Storz GmbH, Tuttlingen, Germany) was used in pediatric microneurosurgical operations, along with an OPMI PENTERO operative microscope (Carl Zeiss AG, Jena, Germany)...
January 24, 2018: Curēus
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