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https://www.readbyqxmd.com/read/28437932/electrifying-catheters-with-light
#1
Martin Pekař, Jeannet van Rens, Martin B van der Mark
Smart minimally invasive devices face a connectivity challenge. An example is found in intracardiac echocardiography where the signal transmission and supply of power at the distal end require many thin and fragile wires in order to keep the catheter slim and flexible. We have built a fully functional bench-top prototype to demonstrate that electrical wires may be replaced by optical fibers. The prototype is immediately scalable to catheter dimensions. The absence of conductors will provide intrinsic galvanic isolation as well as radio frequency (RF) and magnetic resonance imaging (MRI) compatibility...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28437852/a-diagnostic-microdosing-approach-to-investigate-platinum-sensitivity-in-non-small-cell-lung-cancer
#2
Si-Si Wang, Maike Zimmermann, Hongyong Zhang, Tzu-Yin Lin, Michael Malfatti, Kurt Haack, Kenneth W Turteltaub, George D Cimino, Ralph de Vere White, Chong-Xian Pan, Paul T Henderson
The platinum-based drugs cisplatin, carboplatin and oxaliplatin are often used for chemotherapy, but drug resistance is common. The prediction of resistance to these drugs via genomics is a challenging problem since hundreds of genes are involved. A possible alternative is to use mass spectrometry to determine the propensity for cells to form drug-DNA adducts-the pharmacodynamic drug-target complex for this class of drugs. The feasibility of predictive diagnostic microdosing was assessed in non-small cell lung cancer (NSCLC) cell culture and a pilot clinical trial...
April 24, 2017: International Journal of Cancer. Journal International du Cancer
https://www.readbyqxmd.com/read/28437721/optimizing-follow-up-and-study-retention-in-the-21st-century-advances-from-the-front-line-in-alcohol-and-tobacco-research
#3
Lia J Smith, Patrick J McNamara, Andrea C King
AIMS: Longitudinal studies are integral in addiction research but retention of participants over time can be challenging. While statistical algorithms for missing data have advanced, they remain less desirable than collecting actual data with high retention rates. An update to methodological primers with consideration of evolving technology and privacy concerns is needed for 21st century researchers. METHODS: Comprehensive follow-up methodological strategies were conducted in four concurrent laboratory- and intervention-based studies across N=697 drinker and smokers enrolled in studies at the Clinical Addictions Research Laboratory at the University of Chicago...
April 15, 2017: Drug and Alcohol Dependence
https://www.readbyqxmd.com/read/28437634/convolutional-neural-network-regression-for-short-axis-left-ventricle-segmentation-in-cardiac-cine-mr-sequences
#4
Li Kuo Tan, Yih Miin Liew, Einly Lim, Robert A McLaughlin
Automated left ventricular (LV) segmentation is crucial for efficient quantification of cardiac function and morphology to aid subsequent management of cardiac pathologies. In this paper, we parameterize the complete (all short axis slices and phases) LV segmentation task in terms of the radial distances between the LV centerpoint and the endo- and epicardial contours in polar space. We then utilize convolutional neural network regression to infer these parameters. Utilizing parameter regression, as opposed to conventional pixel classification, allows the network to inherently reflect domain-specific physical constraints...
April 12, 2017: Medical Image Analysis
https://www.readbyqxmd.com/read/28437628/advanced-biomaterials-and-microengineering-technologies-to-recapitulate-the-stepwise-process-of-cancer-metastasis
#5
REVIEW
Nitish Peela, Danh Truong, Harpinder Saini, Hunghao Chu, Samaneh Mashaghi, Stephanie L Ham, Sunil Singh, Hossein Tavana, Bobak Mosadegh, Mehdi Nikkhah
Cancer is one of the leading causes of death globally according to the World Health Organization. Although improved treatments and early diagnoses have reduced cancer related mortalities, metastatic disease remains a major clinical challenge. The local tumor microenvironment plays a significant role in cancer metastasis, where tumor cells respond and adapt to a plethora of biochemical and biophysical signals from stromal cells and extracellular matrix (ECM) proteins. Due to these complexities, there is a critical need to understand molecular mechanisms underlying cancer metastasis to facilitate the discovery of more effective therapies...
April 21, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437627/tumor-acidity-activatable-tat-targeted-nanomedicine-for-enlarged-fluorescence-magnetic-resonance-imaging-guided-photodynamic-therapy
#6
Meng Gao, Feng Fan, Dongdong Li, Yue Yu, Kuirong Mao, Tianmeng Sun, Haisheng Qian, Wei Tao, Xianzhu Yang
Nanoparticles simultaneously integrated the photosensitizers and diagnostic agents represent an emerging approach for imaging-guided photodynamic therapy (PDT). However, the diagnostic sensitivity and therapeutic efficacy of nanoparticles as well as the heterogeneity of tumors pose tremendous challenges for clinical imaging-guided PDT treatment. Herein, a polymeric nanoparticle with tumor acidity (pHe)-activatable TAT targeting ligand that encapsulates the photosensitizer chlorin e6 (Ce6) and chelates contrast agent Gd(3+) is successfully developed for fluorescence/magnetic resonance (MR) dual-model imaging-guided precision PDT...
April 18, 2017: Biomaterials
https://www.readbyqxmd.com/read/28437579/mosaic-trisomy-1q-a-recurring-chromosome-anomaly-that-is-a-diagnostic-challenge-and-is-associated-with-a-fryns-like-phenotype
#7
Kathleen M Bone, Judy E Chernos, Renee Perrier, A Micheil Innes, Francois P Bernier, Ross McLeod, Mary Ann Thomas
OBJECTIVE: Trisomy of the long arm of chromosome 1 is a very rare cytogenetic anomaly that is difficult to diagnose due to tissue-limited mosaicism. This study aimed to further characterize the prenatal and postnatal findings associated with this anomaly, including the first reported chromosomal microarray finding. METHOD: This is a retrospective study of 6 cases of mos 46,X,der(Y)t(Y;1)(q12;q21)/46,XY diagnosed both pre- and postnatally. Detailed clinical features and pregnancy outcome were documented...
April 24, 2017: Prenatal Diagnosis
https://www.readbyqxmd.com/read/28437370/ethics-guide-recommendations-for-organ-donation-focused-physicians-endorsed-by-the-canadian-medical-association
#8
Sam D Shemie, Christy Simpson, Jeff Blackmer, Shavaun MacDonald, Sonny Dhanani, Sylvia Torrance, Paul Byrne
Donation physicians are specialists with expertise in organ and tissue donation and have been recognized internationally as a key contributor to improving organ and tissue donation services. Subsequent to a 2011 Canadian Critical Care Society-Canadian Blood Services consultation, the donation physician role has been gradually implemented in Canada. These professionals are generally intensive care unit physicians with an enhanced focus and expertise in organ/tissue donation. They must manage the dual obligation of caring for dying patients and their families while providing and/or improving organ donation services...
May 2017: Transplantation
https://www.readbyqxmd.com/read/28437369/ethical-challenges-and-the-donation-physician-specialist-a-scoping-review
#9
Shavaun I MacDonald, Sam D Shemie
Deceased donation medicine involves unique ethical challenges. Physicians who are focused on deceased donation medicine as part of their practice can expect to encounter these challenges. The goal of this review is to identify and describe these challenges, highlight existing guidelines and policy regarding the management of these challenges and to describe how the donation physician role might promote ethical practice in deceased donation medicine. Themes of discussion include: communication with families, interprofessional conflict, donation physician personal characteristics, donation clinical processes, health resource allocation, research and education, and remuneration...
May 2017: Transplantation
https://www.readbyqxmd.com/read/28437349/a-new-navigational-tool-for-pedicle-screw-placement-in-patients-with-severe-scoliosis-a-pilot-study-to-prove-feasibility-accuracy-and-identify-operative-challenges
#10
Michael Putzier, Patrick Strube, Riccardo Cecchinato, Claudio Lamartina, Eike K Hoff
STUDY DESIGN: Pilot study. OBJECTIVE: To develop and validate the feasibility and accuracy of a newly designed navigational spinal instrument guiding tool for patient-matched thoracic and lumbar pedicle screw placement in patients with severe scoliosis, and to identify intraoperative challenges that may be relevant. SUMMARY OF BACKGROUND DATA: Pedicle screw placement is challenging in severely rotated scoliotic spine with small diameters and asymmetrical shape of the pedicles and vertebrae...
May 2017: Clinical Spine Surgery
https://www.readbyqxmd.com/read/28437147/comparison-of-two-types-of-meditation-on-patients-psychosocial-responses-during-radiation-therapy-for-head-and-neck-cancer
#11
Gisela Boxleitner, Shelley Jolie, Dana Shaffer, Nicholas Pasacreta, Mei Bai, Ruth McCorkle
OBJECTIVES: Radiation treatment for head and neck cancer introduces adaptive demands and subjects patients to significant and unique psychosocial challenges. There is growing evidence that meditation is useful in lessening anxiety and depression in cancer patients. This study compared the effects of two types of meditation training on the psychological responses of patients with head and neck cancer during radiation therapy. DESIGN: Randomized clinical trial. SETTING: Smilow Cancer Hospital at Yale New Haven...
February 17, 2017: Journal of Alternative and Complementary Medicine: Research on Paradigm, Practice, and Policy
https://www.readbyqxmd.com/read/28437003/high-intensity-focused-ultrasound-for-the-treatment-of-adenomyosis-selection-criteria-efficacy-safety-and-fertility
#12
Lian Zhang, Fangwen Rao, Raymond Setzen
Adenomyosis is a disorder of uterus in which endometrial glands and stroma are present within the uterine musculature. The main clinical manifestations are dysmenorrhea and menorrhagia. Adenomyosis has a great impact on both the quality of life and fertility of women. The treatment of adenomyosis remains an immense challenge MATERIAL AND METHODS: Relevant articles were searched through MEDLINE, Pubmed between 2000 and March 2017. The search terms of adenomyosis, magnetic resonance imaging (MRI) features of adenomyosis, high intensity focused ultrasound (HIFU), Ultrasound-guided HIFU and MRgFUS were used...
April 24, 2017: Acta Obstetricia et Gynecologica Scandinavica
https://www.readbyqxmd.com/read/28436946/essential-role-for-bim-in-mediating-the-apoptotic-and-antitumor-activities-of-immunotoxins
#13
A Antignani, D Segal, N Simon, R J Kreitman, D Huang, D J FitzGerald
Protein synthesis is crucial for regulating cell homeostasis and, when unrestricted, it can lead to tumorigenesis. Immunotoxins derived from Pseudomonas exotoxin are antibody-toxin fusion proteins that inhibit protein synthesis of mammalian cells via ADP-ribosylation of the eukaryotic elongation factor-2. Here we investigate the role of the Bcl-2 family proteins in the response of cancer cells to immunotoxin challenge. Besides the well-known reduction of the prosurvival Bcl-2 family member, Mcl-1, following inhibition of protein synthesis, we show for the first time that immunotoxins also reduce the levels of selected proapoptotic BH-3-only proteins...
April 24, 2017: Oncogene
https://www.readbyqxmd.com/read/28436854/manifold-embedding-and-semantic-segmentation-for-intraoperative-guidance-with-hyperspectral-brain-imaging
#14
Daniele Ravi, Himar Fabelo, Gustavo Marrero Callico, GuangZhong Yang
Recent advances in hyperspectral imaging have made it a promising solution for intra-operative tissue characterization, with the advantages of being non-contact, non-ionizing and non-invasive. Working with hyperspectral images in vivo, however, is not straightforward as the high dimensionality of the data makes real-time processing challenging. In this paper, a novel dimensionality reduction scheme and a new processing pipeline are introduced to obtain a detailed tumour classification map for intra-operative margin definition during brain surgery...
April 24, 2017: IEEE Transactions on Medical Imaging
https://www.readbyqxmd.com/read/28436715/controlled-invasive-mechanical-ventilation-strategies-in-obese-patients-undergoing-surgery
#15
Lígia de Albuquerque Maia, Pedro Leme Silva, Paolo Pelosi, Patricia Rieken Macedo Rocco
The obesity prevalence is increasing in surgical population. As the number of obese surgical patients increases, so does the demand for mechanical ventilation. Nevertheless, ventilatory strategies in this population are challenging, since obesity results in pathophysiological changes in respiratory function. Areas covered: We reviewed the impact of obesity on respiratory system and the effects of controlled invasive mechanical ventilation strategies in obese patients undergoing surgery. To date, there is no consensus regarding the optimal invasive mechanical ventilation strategy for obese surgical patients, and no evidence that possible intraoperative beneficial effects on oxygenation and mechanics translate into better postoperative pulmonary function or improved outcomes...
April 24, 2017: Expert Review of Respiratory Medicine
https://www.readbyqxmd.com/read/28436602/accuracy-of-circulating-histones-in-predicting-persistent-organ-failure-and-mortality-in-patients-with-acute-pancreatitis
#16
T Liu, W Huang, P Szatmary, S T Abrams, Y Alhamdi, Z Lin, W Greenhalf, G Wang, R Sutton, C H Toh
BACKGROUND: Early prediction of acute pancreatitis severity remains a challenge. Circulating levels of histones are raised early in mouse models and correlate with disease severity. It was hypothesized that circulating histones predict persistent organ failure in patients with acute pancreatitis. METHODS: Consecutive patients with acute pancreatitis fulfilling inclusion criteria admitted to Royal Liverpool University Hospital were enrolled prospectively between June 2010 and March 2014...
April 24, 2017: British Journal of Surgery
https://www.readbyqxmd.com/read/28436328/potential-of-stem-cells-as-regenerative-medicine-from-preface-to-advancements
#17
Muhammad Shahid Javaid, Usman Ali Ashfaq, Muhammad Shareef Masoud
Regenerative medicine is an emerging field to find solutions to some of the most challenging medical problems of humans. Regenerative medicine has the potential to revolutionize the whole health care system, in dealing with conditions such as heart disease, emphysema, liver fibrosis, kidney disease, diabetes, and neurological disorders. Among the many challenges to bringing regenerative medicine to the clinic is the selection of the best cell types and reliable ways to expand the number of cells. Stem cells emerged as the best cell type for regeneration of different organs...
2017: Critical Reviews in Eukaryotic Gene Expression
https://www.readbyqxmd.com/read/28436314/metabolomic-approaches-in-the-discovery-of-potential-urinary-biomarkers-of-drug-induced-liver-injury-dili
#18
Ana Margarida Araújo, Márcia Carvalho, Félix Carvalho, Maria de Lourdes Bastos, Paula Guedes de Pinho
Drug-induced liver injury (DILI) is a major safety issue during drug development, as well as the most common cause for the withdrawal of drugs from the pharmaceutical market. The identification of DILI biomarkers is a labor-intensive area. Conventional biomarkers are not specific and often only appear at significant levels when liver damage is substantial. Therefore, new biomarkers for early identification of hepatotoxicity during the drug discovery process are needed, thus resulting in lower development costs and safer drugs...
April 24, 2017: Critical Reviews in Toxicology
https://www.readbyqxmd.com/read/28436244/a-systematic-review-and-meta-synthesis-of-the-qualitative-literature-exploring-the-experiences-and-quality-of-life-of-survivors-of-a-cardiac-arrest
#19
Gunilla Haydon, Pamela van der Riet, Kerry Inder
BACKGROUND: Survival following cardiac arrest and subsequent cardiopulmonary resuscitation (CPR) is increasing worldwide, mainly due to greater awareness of the symptoms of cardiac events and an increased attention to CPR training. Although patient outcomes remain unpredictable and quantitative studies suggest that the overall quality of life (QOL) is acceptable, it is valuable to synthesise qualitative studies exploring these phenomena in depth, providing a deeper knowledge of survivors' experiences and QOL...
April 1, 2017: European Journal of Cardiovascular Nursing
https://www.readbyqxmd.com/read/28436214/a-comparison-of-the-cost-of-primary-closure-or-rectus-abdominis-myocutaneous-flap-closure-of-the-perineum-after-abdominoperineal-excision
#20
John Woodfield, Michael Hulme-Moir, Jasen Ly
AIM: Perineal wound complications following abdominoperineal resection continue to be a major challenge.. The aim of this study was to compare the clinical outcomes and cost of primary closure (PC) and rectus abdominis myocutaneous flap reconstruction (RAM). METHOD: Retrospective case review of consecutive patients by one surgeon over 11 years. Patient demographics, risk factors, operative details and complications were identified. Inpatient and outpatient costs were calculated...
April 24, 2017: Colorectal Disease: the Official Journal of the Association of Coloproctology of Great Britain and Ireland
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