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https://www.readbyqxmd.com/read/28532015/effect-of-sintering-temperature-rise-from-870-to-920%C3%A2-c-on-physicomechanical-and-biological-quality-of-nano-hydroxyapatite-an-explorative-multi-phase-experimental-in-vitro-vivo-study
#1
Ahad Khoshzaban, Vahid Rakhshan, Farhood Najafi, Leila Aghajanpour, Seyed Jafar Hashemian, Saeed Heidari Keshel, Ikuya Watanabe, Alireza Valanezhad, Tahereh Sadat Jafarzadeh Kashi
Hydroxyapatite (HA) is a proper scaffold for bone repair, however, it is not of excellent mechanical properties. Most previous studies on the effect of temperature increases were in vitro and had assessed merely improvements of HA's physicomechanical quality. This in vitro/vivo study investigated the effect of temperature increases from 870 to 920°C on physicomechanical and biological quality of Nano-HA. Forty experimentally produced HA disks sintered at 870 to 920°C were prepared (n=20×2). Disks were subjected to Vickers microindentation test (1 disk from each group divided into 4 quarters), Fourier transform infrared spectroscopy (1 disk), X-ray diffraction (XRD) [1 disk together with non-sintered HA], field emission scanning electron microscopy (FSEM, 1 disk from each group together with non-sintered HA), cell seeding and SEM assessment (2 disks), MTT assay over 4 different time periods (16 quadrants of 4 disks from each group), 6 one-thirds of 2 disks from each group for immunocytochemical (ICC) assay, and 8 disks from each group [as well as non-sintered HA] for the animal study (implantation in 4 sockets in 8 rabbits [32 specimens], histomorphometry, and computerized tomography) over two time periods...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531940/contusional-cerebellar-hemorrhage-related-to-placement-in-the-protrusion-position-after-atlantoaxial-fusion
#2
Yoshinari Miyaoka, Mikinobu Takeuchi, Norimitsu Wakao, Masahiro Aoyama, Kazuhiro Hongo, Masakazu Takayasu
BACKGROUND: Various complications after C1 lateral mass and C2 pedicle screw fusion surgery (C1LM-C2PSFS) have been reported. However, to our knowledge, this is the first report of contusional cerebellar hemorrhage caused by placement in the protrusion (chin-out) position after C1LM-2PSFS. CASE DESCRIPTION: An 81-year-old woman complaining of gait disturbance and clumsiness of both hands was diagnosed with cervical myelopathy with atlantoaxial subluxation. After we performed C1LM-C2PSFS, her neurologic deficits gradually improved, and there was no radiologic evidence of construct failure...
May 2017: World Neurosurgery
https://www.readbyqxmd.com/read/28531866/bilateral-peritonsillar-abscess-a-case-report-and-pertinent-literature-review
#3
Ibrahim AlAwadh, Turki Aldrees, Saleh AlQaryan, Sami Alharethy, Hassan AlShehri
INTRODUCTION: The peritonsillar space is defined as the area between the palatine tonsillar capsule medially and the superior pharyngeal constrictor muscle laterally. Unilateral peritonsillar abscess (PTA) is more common than the bilateral condition. To the best of our knowledge, only 13 cases of bilateral PTA have been reported worldwide; this is the first case reported from Saudi Arabia. PRESENTATION OF CASE: We present a case involving a 16-year-old boy who presented to the emergency department with a5-day history of sore throat, dysphagia, trismus, drooling, and a muffled "hot-potato" voice, but with no symptoms of airway compromise...
May 15, 2017: International Journal of Surgery Case Reports
https://www.readbyqxmd.com/read/28531828/ct-and-mri-based-door-needle-times-for-acute-stroke-patients-a-quasi-randomized-clinical-trial
#4
Christine Krarup Hansen, Anders Christensen, Helen Rodgers, Inger Havsteen, Christina Kruuse, Janus Nybing, Mari-Anne Kaasbøl, Hanne Christensen
Door-Needle-times (DNT) of 20min are feasible when Computer Tomography (CT) is used for first-line brain-imaging to assess stroke-patients' eligibility for intravenous-tissue-Plasminogen-Activator (iv-tPA), but the more time-consuming Magnetic Resonance Imaging (MRI)-based-evaluation is superior in detecting acute ischaemia.
May 10, 2017: Clinical Neurology and Neurosurgery
https://www.readbyqxmd.com/read/28531568/macronutrient-and-alcohol-intake-is-associated-with-intermuscular-adipose-tissue-in-a-randomly-selected-group-of-younger-and-older-men-and-women
#5
Kajsa Sjöholm, Lena Gripeteg, Ingrid Larsson
BACKGROUND: Alcohol and macronutrient intake have been found to be related to general and central body fat distribution. Intermuscular adipose tissue (IMAT) is a small ectopic fat depot located within the muscle bundles. IMAT is important for muscle function, mobility and energy homeostasis and also associated with cardiovascular- and diabetes-related risk factors. AIM: To test the hypothesis that macronutrient and alcohol intake is associated with IMAT. METHODS: 50 men and 50 women, randomly selected from the general population formed height- and weight-representative age groups of 50 younger (27-31 years) and 50 older (57-61 years) subjects...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531567/impact-of-body-composition-parameters-on-clinical-outcomes-in-patients-with-metastatic-castrate-resistant-prostate-cancer-treated-with-docetaxel
#6
Samantha J Cushen, Derek G Power, Kevin P Murphy, Ray McDermott, Brendan T Griffin, Marvin Lim, Louise Daly, Peter MacEneaney, Kathleen O' Sullivan, Carla M Prado, Aoife M Ryan
BACKGROUND: Body composition may influence clinical outcomes of certain chemotherapeutic agents. We examined the prognostic significance of skeletal muscle mass and adipose tissue on docetaxel toxicity and overall survival in patients with metastatic castrate resistant prostate cancer (mCRPC). METHODS: A retrospective review of patients medical records with mCRPC, treated with docetaxel was conducted. Body composition parameters (skeletal muscle mass, muscle attenuation [MA], visceral and subcutaneous adipose tissue) were measured at L3 by computed tomography (CT) and defined using previously established cut points...
June 2016: Clinical Nutrition ESPEN
https://www.readbyqxmd.com/read/28531347/stacked-gold-nanodisks-for-bimodal-photoacoustic-and-optical-coherence-imaging
#7
Jung-Sub Wi, Jisoo Park, Heesung Kang, Donggeun Jung, Sang-Won Lee, Tae Geol Lee
Herein, we report on biological imaging nanoprobes: physically-synthesized gold nanodisks that have inherent optical advantages-a wide range of resonant wavelengths, tunable ratio of light absorption-to-scattering, and responsiveness to random incident light-due to their two-dimensional circular nanostructure. Based on our proposed physical synthesis where gold is vacuum-deposited onto a pre-patterned polymer template and released from the substrate in the form of a nanodisk, monodisperse two-dimensional gold nanodisks were prepared with independent control of their diameter and thickness...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28531331/diagnostic-challenges-in-meningioma
#8
Martha Nowosielski, Nobert Galldiks, Sarah Iglseder, Philipp Kickingereder, Andreas von Deimling, Martin Bendszus, Wolfgang Wick, Felix Sahm
Advances in molecular profiling and the application of advanced imaging techniques are currently refreshing diagnostic considerations in meningioma patients. Not only technical refinements but also sophisticated histopathological and molecular studies have the potential to overcome some of the challenges during meningioma management. Exact tumor delineation, assessment of tumor growth and pathophysiological parameters were recently addressed by "advanced" magnetic resonance imaging and positron emission tomography...
May 20, 2017: Neuro-oncology
https://www.readbyqxmd.com/read/28531321/cortical-bone-size-deficit-in-adult-patients-with-type-1-diabetes-mellitus
#9
Charlotte Verroken, Wout Pieters, Loïc Beddeleem, Stefan Goemaere, Hans-Georg Zmierczak, Samyah Shadid, Jean-Marc Kaufman, Bruno Lapauw
CONTEXT: The increased fracture risk associated with type 1 diabetes mellitus (T1DM) remains unexplained by traditional risk factors such as low areal bone mineral density (aBMD). Nonetheless, few data exist on other determinants of bone strength in T1DM, including volumetric BMD (vBMD) and bone geometry. OBJECTIVE: We compared areal and volumetric bone parameters and cortical bone geometry in adult T1DM patients and gender- and age-matched controls. DESIGN: Cross-sectional study including 64 adult T1DM patients (38 men, 41...
May 22, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28531270/utilization-of-quantitative-susceptibility-mapping-for-direct-targeting-of-the-subthalamic-nucleus-during-deep-brain-stimulation-surgery
#10
Jonathan Rasouli, Ritesh Ramdhani, Fedor E Panov, Alexey Dimov, Yan Zhang, Catherine Cho, Yi Wang, Brian Harris Kopell
BACKGROUND: Deep brain stimulation of the subthalamic nucleus (STN) has demonstrated efficacy in improving motor disability in Parkinson's disease. The recently developed quantitative susceptibility mapping (QSM) technique, which can accurately map iron deposits in deep brain nuclei, promises precise targeting of the STN. OBJECTIVE: To demonstrate the use of QSM to target STN effectively by correlating with classical physiological-based targeting measures in a prospective study...
May 21, 2017: Operative Neurosurgery (Hagerstown, Md.)
https://www.readbyqxmd.com/read/28530843/cone-beam-computed-tomography-evaluation-on-the-condylar-displacement-following-sagittal-split-ramus-osteotomy-in-asymmetric-setback-patients-comparison-between-conventional-approach-and-surgery-first-approach
#11
Min-Hee Oh, Hyeon-Shik Hwang, Kyung-Min Lee, Jin-Hyoung Cho
OBJECTIVE: To compare the condylar displacement following sagittal split ramus osteotomy (SSRO) in asymmetric setback patients between the conventional approach and surgery-first approach and to determine whether the condylar displacement is affected by asymmetric setback in SSRO patients. MATERIALS AND METHODS: This was a retrospective study. The subjects consisted of patients with facial asymmetry who underwent SSRO and had cone-beam computed tomography taken before and 1 month after surgery...
May 22, 2017: Angle Orthodontist
https://www.readbyqxmd.com/read/28530783/a-rare-case-of-obscure-gastrointestinal-bleeding-small-bowel-varices-flowing-into-the-inferior-epigastric-vein
#12
Akira Hoshiai, Junya Tsurukiri, Yasuhiro Sumi
Ectopic varices include all varices except esophageal or gastric varices and comprise large portosystemic venous collaterals that occur anywhere in the abdomen. Ectopic varices are relatively rare; however, approximately 5% are related to gastrointestinal bleeding. Ectopic varices usually occur in the rectum, duodenum, or colon, and portal hypertension is the most common cause. Hemodynamic profiles of ectopic varices remain unknown, and extensive bleeding from these structures occurs because diagnosis and treatment are difficult...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28530770/diagnostic-value-of-appendicular-doppler-ultrasonography-in-acute-appendicitis
#13
Hüseyin Uzunosmanoğlu, Yunsur Çevik, Şeref Kerem Çorbacıoğlu, Emine Akıncı, Hakan Buluş, Kadir Ağladıoğlu
BACKGROUND: Acute appendicitis is one of the most common causes of acute abdominal pain prompting emergency department (ED) visits. It is critical for the physicians to promptly and accurately diagnose acute appendicitis. The present study aimed to evaluate the diagnostic efficacy of Doppler ultrasonography (USG) in patients with acute appendicitis and compare this new method with other commonly used radio-diagnostic tools. METHODS: All patients who were diagnosed with acute appendicitis at the Kecioren Training and Research Hospital ED and later underwent appendectomy between October 2012 and April 2013 were included in the study...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28530216/-chilaiditi-syndrome-a-case-report
#14
Sławomir Krzemiński
The abnormality being the result of a certain transposition of the large intestine winding in between diaphragm and the liver, owes it's name to a so called Chilaiditi symptom. This symptom is rarely recognized for at most 0,025-0,28% of the whole population statistics - wise. The Chilaiditi symptom can be examined without any serious (abdominal) pain indication, when conducting the gastrointestinal examination with the implication of the different disorders. When carrying out the diagnostic examination, it is strongly recommended to take notice of patients suffering from the pain in abdominal area, especially in case of the patients with the developed air - structure under the right side copula of the diaphragm...
April 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28530215/takotsubo-cardiomyopathy-after-intravenous-epinephrine-administration-following-cardiac-arrest-provoked-by-pneumoperitoneum-a-case-report
#15
Waldemar Elikowski, Malgorzata Małek-Elikowska, Jacek Karoń, Maria Mrozińska, Alina Baszko, Karolina Horbacka
In stress-induced takotsubo cardiomyopathy (TC) high levels of catecholamines, including epinephrine, may be detected in blood. On the other hand, administration of exogenous epinephrine may occasionally result in TC. A CASE REPORT: The authors describe a case of a 58-year-old, otherwise healthy female, with TC which occurred after intravenous injection of 1 mg of epinephrine against cardiac arrest provoked by pneumoperitoneum performed before planned laparoscopic cholecystectomy. She was admitted 3 days earlier due to biliary colic following a dietary mistake...
April 21, 2017: Polski Merkuriusz Lekarski: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/28530209/reproducible-3d-printed-head-tanks-for-electrical-impedance-tomography-with-realistic-shape-and-conductivity-distribution
#16
James Avery, Kirill Aristovich, Barney Low, David Holder
OBJECTIVE: Electrical impedance tomography (EIT) has many promising applications in brain injury monitoring. To evaluate both instrumentation and reconstruction algorithms, experiments are first performed in head tanks. Existing methods, whilst accurate, produce a discontinuous conductivity, and are often made by hand, making it hard for other researchers to replicate. APPROACH: We have developed a method for constructing head tanks directly in a 3D printer. Conductivity was controlled through perforations in the skull surface, which allow for saline to pass through...
May 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28530208/eit-imaging-of-admittivities-with-a-d-bar-method-and-spatial-prior-experimental-results-for-absolute-and-difference-imaging
#17
S J Hamilton
Electrical impedance tomography (EIT) is an emerging imaging modality that uses harmless electrical measurements taken on electrodes at a body's surface to recover information about the internal electrical conductivity and or permittivity. The image reconstruction task of EIT is a highly nonlinear inverse problem that is sensitive to noise and modeling errors making the image reconstruction task challenging. D-bar methods solve the nonlinear problem directly, bypassing the need for detailed and time-intensive forward models, to provide absolute (static) as well as time-difference EIT images...
May 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28530206/16th-international-conference-on-electrical-bio-impedance-and-17th-international-conference-on-biomedical-applications-of-electrical-impedance-tomography-eit
#18
Richard Bayford, Stig Ollmar
No abstract text is available yet for this article.
May 22, 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28530205/phantom-experiments-using-soft-prior-regularization-eit-for-breast-cancer-imaging
#19
Ethan K Murphy, Aditya Mahara, Xiaotian Wu, Ryan J Halter
OBJECTIVE: A soft-prior regularization (SR) electrical impedance tomography (EIT) technique for breast cancer imaging is described, which shows an ability to accurately reconstruct tumor/inclusion conductivity values within a dense breast model investigated using a cylindrical and a breast-shaped tank. APPROACH: The SR-EIT method relies on knowing the spatial location of a suspicious lesion initially detected from a second imaging modality. Standard approaches (using Laplace smoothing and total variation regularization) without prior structural information are unable to accurately reconstruct or detect the tumors...
June 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28530203/eit-based-pulsatile-impedance-monitoring-during-spontaneous-breathing-in-cystic-fibrosis
#20
Sabine Krueger-Ziolek, Benjamin Schullcke, Bo Gong, Ullrich Müller-Lisse, Knut Moeller
OBJECTIVE: Evaluating the lung function in patients with obstructive lung disease by electrical impedance tomography (EIT) usually requires breathing maneuvers containing deep inspirations and forced expirations. Since these maneuvers strongly depend on the patient's co-operation and health status, normal tidal breathing was investigated in an attempt to develop continuous maneuver-free measurements. APPROACH: Ventilation related and pulsatile impedance changes were systematically analyzed during normal tidal breathing in 12 cystic fibrosis (CF) patients and 12 lung-healthy controls (HL)...
June 2017: Physiological Measurement
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