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Zhe Li, Jian-Guo Zhang, Yan Ye, Xiaoping Li
BACKGROUND: Accurate implantation of a depth electrode into the brain is of the greatest importance in deep brain stimulation (DBS), and various stereotactic systems have been developed for electrode implantation. However, an updated analysis of depth electrode implantation in the modern era of DBS is lacking. OBJECTIVE: This study aims at providing an updated review on targeting accuracy of DBS electrode implantation by analyzing contemporary DBS electrode implantation operations from the perspective of precision engineering...
October 27, 2016: Stereotactic and Functional Neurosurgery
Michael D Besmer, Frederik Hammes
Short-term fluctuations in bacterial concentrations in drinking water systems, occurring on time scales of hours-to-weeks, are essentially unexplored due to a lack of microbial monitoring tools that allow high frequency measurements. Here, we applied fully automated online flow cytometry to measure the total cell concentrations (TCC) in both raw water (karstic groundwater) and treated water (flocculation - ultrafiltration (UF) - ozonation - granular active carbon (GAC) filtration) during a period of 70 days at high temporal resolution (n > 4000 for both water types)...
October 18, 2016: Water Research
Dária Neves, Meritxell Sabidó, Camila Bôtto-Menezes, Nina Schwartz Benzaken, Lucília Jardim, Cynthia Ferreira, André Leturiondo, Camila Gurgel Dos Santos, Adele Schwartz Benzaken
Screening for Chlamydia trachomatis is not routinely offered to young asymptomatic women in Brazil. This study evaluated the performance, usefulness, and operational suitability of the Digene Hybrid Capture II (HCII) CT-ID DNA-test as an opportunistic screening tool to detect C. trachomatis in the public health system in Manaus, Amazonas State. Women aged 14-25 years who attended primary health care services were interviewed and one cervical specimen was collected during cytological screening. The HCII CT test was evaluated for its ability to detect the presence of C...
October 20, 2016: Cadernos de Saúde Pública
Thaís Flôr da Rocha, Juliana Gibbon Neves, Karin Viegas
Objective: to identify the severity of patients admitted to an emergency trauma. Method: A cross-sectional and retrospective study with 115 trauma patients classified as orange (Manchester System), from June 2013 to July 2014. The data were presented as mean and standard deviation, in addition to the Pearson Chi-square test, One-Way ANOVA and Tukey tests. Results: from the sample, 81.7% were male with mean age of 39.46±19.71 years. Higher incidence of major trauma (48...
September 2016: Revista Brasileira de Enfermagem
Aurelie Thomas, Amy Miller, Johnny Roughan, Aneesa Malik, Katherine Haylor, Charlotte Sandersen, Paul Flecknell, Matthew Leach
Concerns over interactions between analgesics and experimental outcomes are a major reason for withholding opioids from rats undergoing surgical procedures. Only a fraction of morphine injected intravenously reaches receptors responsible for analgesia in the central nervous system. Intrathecal administration of morphine may represent a way to provide rats with analgesia while minimizing the amount of morphine injected. This study aimed to assess whether morphine injected intrathecally via direct lumbar puncture provides sufficient analgesia to rats exposed to acute surgical pain (caudal laparotomy)...
2016: PloS One
Michael Pieroni, Clara Lagomarsini, Danilo De Rossi, Federico Carpi
Electrically tunable lenses are conceived as deformable adaptive optical components able to change focus without motor-controlled translations of stiff lenses. In order to achieve large tuning ranges, large deformations are needed. This requires new technologies for the actuation of highly stretchable lenses. This paper presents a configuration to obtain compact tunable lenses entirely made of soft solid matter (elastomers). This was achieved by combining the advantages of dielectric elastomer actuation (DEA) with a design inspired by the accommodation of reptiles and birds...
October 26, 2016: Bioinspiration & Biomimetics
Cannada Andrew Lewis, Justus Aaron Calvin, Edward F Valeev
We describe the Clustered Low Rank (CLR) framework for block-sparse and block-low-rank tensor representation and computation. The CLR framework exploits the tensor structure revealed by basis clustering; computational savings arise from low-rank compression of tensor blocks and performing block arithmetic in the low-rank form whenever beneficial. The precision is rigorously controlled by 2 parameters, avoiding ad-hoc heuristics, such as domains: one controls the CLR block rank truncation and the other controls screening of small contributions in arithmetic operations on CLR tensors to propagate sparsity through expressions...
October 26, 2016: Journal of Chemical Theory and Computation
Philip W Chiu, Anthony Y Teoh, Vivien W Wong, Hon Chi Yip, Shannon M Chan, Simon K Wong, Enders K Ng
Minimally invasive esophagectomy (MIE) is technically challenging. Da Vinci Robotic system could improve surgical dissection with additional degree of freedom from robotic arms. This study aimed to assess the feasibility and safety of performing MIE using Da Vinci Robotic system among patients with esophageal cancers. From 2009 to 2013, consecutive patients with esophageal cancers who received robotic-assisted MIE were recruited. We excluded tumors with suspected invasion to adjacent organs. Preoperative staging included EUS, CT thorax and abdomen and bronchoscopy...
October 25, 2016: Journal of Robotic Surgery
Ryszard Świetlik, Marzena Trojanowska, Bożena Karbowska, Włodzimierz Zembrzuski
Speciation of volatile metals Cd, Pb, and Tl in fly ashes (FAs) produced from burning of hard coal in stocker-fired boilers (SFBs) was studied. Two grain fractions of fly ash collected in a multicyclone and battery cyclone of the systems of dust separation from three SFB units operating in various urban heating plants were analyzed. The characteristic feature of speciation of the three metals was a large share of labile fractions: Cd (av. 46.1 %), Pb (av. 39.8 %), and Tl (av. 21.6 %). The fraction which most clearly reflected the different chemical properties of the investigated metals was the oxidizable fraction: F(4)-Cd-0 %, F(4)-Pb-av...
November 2016: Environmental Monitoring and Assessment
Alejandro Gonzalez-Martinez, Alejandro Rodriguez-Sanchez, M C M van Loosdrecht, Jesus Gonzalez-Lopez, Riku Vahala
The nitrogen cycle has been expanded with the recent discovery of Nitrospira strains that can conduct complete ammonium oxidation (commamox). Their importance in the nitrogen cycle within engineered ecosystems has not yet been analyzed. In this research, the community structure of the Bacteria domain of six full-scale activated sludge systems and three autotrophic nitrogen removal systems in the Netherlands and China has been investigated through tag-454-pyrosequencing. The phylogenetic analyses conducted in the present study showed that just a few of the Nitrospira sequences found in the bioreactors were comammox...
October 26, 2016: Environmental Science and Pollution Research International
Gyotane Umefune, Hirofumi Kogure, Tsuyoshi Hamada, Hiroyuki Isayama, Kazunaga Ishigaki, Kaoru Takagi, Dai Akiyama, Takeo Watanabe, Naminatsu Takahara, Suguru Mizuno, Saburo Matsubara, Natsuyo Yamamoto, Yousuke Nakai, Minoru Tada, Kazuhiko Koike
BACKGROUND: Procalcitonin is being increasingly used to diagnose and grade acute systemic bacterial infection at an early stage of disease onset. The aim of this prospective study was to evaluate the usefulness of procalcitonin for severity grading of acute cholangitis on patient admission. METHODS: Patients with acute cholangitis were prospectively enrolled. The severity of acute cholangitis was graded on the basis of the 2013 Tokyo guidelines (Japanese Society of Hepato-Biliary-Pancreatic Surgery, 2013)...
October 25, 2016: Journal of Gastroenterology
Masaki Takao, Takashi Nishii, Takashi Sakai, Nobuhiko Sugano
PURPOSE: Rotational acetabular osteotomy (RAO) is used to treat developmental hip dysplasia (DDH). It requires detailed anatomical knowledge of the pelvic anatomy and three-dimensional cognitive skills. We addressed whether a computer navigation system combined with a preoperative computed tomography-based plan enabled surgeons to perform RAO safely and reliably through a mini-incision regardless of their level of experience with performing osteotomies. METHODS: We enrolled 24 patients (25 hips) with DDH (radiographic grade 0 or 1 osteoarthritic changes: Tönnis classification)...
October 25, 2016: International Journal of Computer Assisted Radiology and Surgery
Slavica Pavlov-Dolijanovic, Nebojsa Petrovic, Nada Vujasinovic Stupar, Nemanja Damjanov, Goran Radunovic, Dragan Babic, Dragana Sobic-Saranovic, Vera Artiko
We assess the usefulness of (99m)Tc-pertechnetate hand perfusion scintigraphy in patients with Raynaud's phenomenon (RP). The study population consisted of 18 patients with primary RP, 25 patients with secondary RP within systemic sclerosis (SSc), and ten healthy individuals. Gamma camera dynamic first-pass study during the first 60 s and a static scintigraphy after 5 min were recorded following a bolus injection of (99m)Tc-pertechnetate via a cubital vein. Regions of interest were drawn on the summed images around the fingers and the palmar region...
October 25, 2016: Rheumatology International
J Schmolders, S Koob, P Schepers, P H Pennekamp, S Gravius, D C Wirtz, R Placzek, A C Strauss
PURPOSE AND OBJECTIVE: Bone resection regarding adequate surgical margins is the treatment of choice for malignant bone tumors. In the case of metastasis-related complications, so-called skeletal-related events, it is highly important to achieve pain relief and a stable joint situation to re-mobilize the patients immediately following surgery. To bridge the often large osseous defect zones after tumor resection, both cemented and uncemented modular endoprosthetic systems are widely used...
October 25, 2016: Archives of Orthopaedic and Trauma Surgery
Roger M Pallares, Michel Bosman, Nguyen T K Thanh, Xiaodi Su
A hybrid system made of gold nanorods (AuNRs) and double-stranded DNA (dsDNA) is used to build a versatile multi-logic gate platform, capable of performing six different logic operations. The sequence-specific binding of transcription factors to the DNA drives the optical response of the design.
October 26, 2016: Nanoscale
Caroline A Yao, Jordan Swanson, Dayana Chanson, Trisa B Taro, Barrie Gura, Jane C Figueiredo, Heather Wipfli, Kristin Hatcher, Richard Vanderburg, William P Magee
BACKGROUND: Despite health system advances, residents of low- and middle-income countries continue to experience substantial barriers in accessing health care, particularly for specialized care such as plastic and reconstructive surgery. METHODS: A cross-sectional household survey of patients seeking surgical care for cleft lip and/or cleft palate was completed at five Operation Smile International mission sites throughout Vietnam (Hanoi, Nghe An, Hue, Ho Chi Minh City, An Giang, and Bac Lieu) in November of 2014...
November 2016: Plastic and Reconstructive Surgery
Noa Geffen, Michael Mimouni, Mark Sherwood, Ehud I Assia
PURPOSE: To evaluate the efficacy and safety of CO2 Laser-assisted Sclerectomy Surgery (CLASS) in primary and pseudoexfoliative open-angle glaucoma. MATERIALS AND METHODS: Single-arm, open-label study included data from 9 medical centers located in 7 countries. Subjects underwent nonpenetrating CLASS procedure with a CO2 laser system (IOPtiMate). Intraocular pressure (IOP) and number of medications were measured at baseline, 1, 2, 4, and 6 weeks, and 3, 6, 12, 24, and 36 months...
October 25, 2016: Journal of Glaucoma
Kimberly Howard-Quijano, Ali Salem, Charles Barkulis, Einat Mazor, Jennifer C Scovotti, Jonathan K Ho, Richard J Shemin, Tristan Grogan, David Elashoff, Aman Mahajan
BACKGROUND: Echocardiography-based speckle-tracking strain imaging is an emerging modality to assess left ventricular function. The aim of this study was to investigate the change in left ventricular systolic function after cardiac surgery with 3-dimensional (3D) speckle-tracking strain imaging and to determine whether preoperative 3D strain is an independent predictor of acute and long-term clinical outcomes after aortic valve, mitral valve, and coronary artery bypass grafting operations...
October 24, 2016: Anesthesia and Analgesia
Asmaa N Mohammad, Khairy H Morsy, Moustafa A Ali
BACKGROUND/AIMS: To find the most accurate, suitable, and applicable scoring system for the prediction of outcome in cirrhotic patients with bleeding varices. MATERIALS AND METHODS: A prospective study was conducted comprising 120 cirrhotic patients with acute variceal bleeding who were admitted to Tropical Medicine and Gastroenterology Department in Sohag University Hospital, over a 1-year period (1/2015 to 1/2016). The clinical, laboratory, and endoscopic parameters were studied...
September 2016: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
Martha Gabriela Martinez, Jillian Clare Kohler
BACKGROUND: Brazil created Health Councils to bring together civil society groups, heath professionals, and government officials in the discussion of health policies and health system resource allocation. However, several studies have concluded that Health Councils are not very influential on healthcare policy. This study probes this issue further by providing a descriptive account of some of the challenges civil society face within Brazil's Health Councils. METHODS: Forty semi-structured interviews with Health Council Members at the municipal, state and national levels were conducted in June and July of 2013 and May of 2014...
October 26, 2016: Globalization and Health
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