keyword
MENU ▼
Read by QxMD icon Read
search

Dose reference levels

keyword
https://www.readbyqxmd.com/read/29155991/efficacy-and-safety-of-switching-to-pasireotide-in-acromegaly-patients-controlled-with-pegvisomant-and-first-generation-somatostatin-analogues-pape-study
#1
Ammar Muhammad, Aart J van der Lely, Patric J D Delhanty, Alof H G Dallenga, Iain K Haitsma, Joseph A M J L Janssen, Sebastian J C M M Neggers
Aim: To assess the efficacy and safety of pasireotide long-acting release (PAS-LAR) alone or in combination with pegvisomant by switching acromegaly patients who were well-controlled with somatostatin analogues (LA-SSAs) and pegvisomant to PAS-LAR with or without pegvisomant. Methods: 61 acromegaly patients were enrolled in a prospective open-label study. We included patients with an IGF-I ≤1.2 x Upper Limit of Normal (ULN) during treatment with LA-SSAs and pegvisomant...
November 15, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29153464/international-guideline-for-the-delineation-of-the-clinical-target-volumes-ctv-for-nasopharyngeal-carcinoma
#2
Anne W Lee, Wai Tong Ng, Jian Ji Pan, Sharon S Poh, Yong Chan Ahn, Hussain AlHussain, June Corry, Cai Grau, Vincent Grégoire, Kevin J Harrington, Chao Su Hu, Dora L Kwong, Johannes A Langendijk, Quynh Thu Le, Nancy Y Lee, Jin Ching Lin, Tai Xiang Lu, William M Mendenhall, Brian O'Sullivan, Enis Ozyar, Lester J Peters, David I Rosenthal, Yoke Lim Soong, Yungan Tao, Sue S Yom, Joseph T Wee
PURPOSE: Target delineation in nasopharyngeal carcinoma (NPC) often proves challenging because of the notoriously narrow therapeutic margin. High doses are needed to achieve optimal levels of tumour control, and dosimetric inadequacy remains one of the most important independent factors affecting treatment outcome. METHOD: A review of the available literature addressing the natural behaviour of NPC and correlation between clinical and pathological aspects of the disease was conducted...
November 15, 2017: Radiotherapy and Oncology: Journal of the European Society for Therapeutic Radiology and Oncology
https://www.readbyqxmd.com/read/29152898/tolerance-levels-of-ct-number-to-electron-density-table-for-photon-beam-in-radiotherapy-treatment-planning-system
#3
Minoru Nakao, Shuichi Ozawa, Kiyoshi Yamada, Katsunori Yogo, Fumika Hosono, Masahiro Hayata, Akito Saito, Kentaro Miki, Takeo Nakashima, Yusuke Ochi, Daisuke Kawahara, Yoshiharu Morimoto, Toru Yoshizaki, Hiroshige Nozaki, Kosaku Habara, Yasushi Nagata
The accuracy of computed tomography number to electron density (CT-ED) calibration is a key component for dose calculations in an inhomogeneous medium. In a previous work, it was shown that the tolerance levels of CT-ED calibration became stricter with an increase in tissue thickness and decrease in the effective energy of a photon beam. For the last decade, a low effective energy photon beam (e.g., flattening-filter-free (FFF)) has been used in clinical sites. However, its tolerance level has not been established yet...
November 20, 2017: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/29148978/antidiabetic-and-in-vitro-antioxidant-effects-of-hydromethanol-extract-of-paullinia-pinnata-root-bark-in-alloxan-induced-diabetic-rat
#4
Onoja Samuel Okwudili, Nwachukwu Glory Chimaobi, Ezeja Maxwell Ikechukwu, Omeh Yusuf Ndukaku
Background The study evaluated phytochemical composition, antidiabetic, oral glucose tolerance test and in vitro antioxidant activities of hydromethanol extract of Paullinia pinnata root bark. Methods Cold maceration method was used in extract preparation and scavenging of 2,2-diphenyl-1-picrylhydrazyl radicals was used to evaluate antioxidant properties of the extract. Diabetes was induced with alloxan at the dose of 160 mg/kg. The antidiabetic activity of the extract was tested at doses of 50, 100 and 200 mg/kg, and glibenclamide was used as reference drug...
November 17, 2017: Journal of Complementary & Integrative Medicine
https://www.readbyqxmd.com/read/29145693/early-erythropoiesis-stimulating-agents-in-preterm-or-low-birth-weight-infants
#5
REVIEW
Arne Ohlsson, Sanjay M Aher
BACKGROUND: Preterm infants have low plasma levels of erythropoietin (EPO), providing a rationale for the use of erythropoiesis-stimulating agents (ESAs) to prevent or treat anaemia and to provide neuro protection and protection against necrotising enterocolitis (NEC). Darbepoetin (Darbe) and EPO are currently available ESAs. OBJECTIVES: To assess the effectiveness and safety of ESAs (erythropoietin (EPO) and/or Darbe) initiated early (before eight days after birth) compared with placebo or no intervention in reducing red blood cell (RBC) transfusions, adverse neurological outcomes, and feeding intolerance including necrotising enterocolitis (NEC) in preterm and/or low birth weight infants...
November 16, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/29143400/pharmacokinetics-of-concentrated-naloxone-nasal-spray-for-opioid-overdose-reversal-phase-i-healthy-volunteer-study
#6
Rebecca McDonald, Ulrike Lorch, Jo Woodward, Björn Bosse, Helen Dooner, Gill Mundin, Kevin Smith, John Strang
BACKGROUND AND AIMS: Take-home naloxone can prevent death from heroin/opioid overdose, but pre-provision is difficult because naloxone is usually given by injection. Non-injectable alternatives, including naloxone nasal sprays, are currently being developed. To be effective, the intranasal (i.n.) spray dose must be adequate but not excessive, and early absorption must be comparable to intramuscular (i.m.) injection. We report on the pharmacokinetics (PK) of a specially produced concentrated novel nasal spray...
November 16, 2017: Addiction
https://www.readbyqxmd.com/read/29141489/non-linear-conversion-of-hx4-uptake-for-automatic-segmentation-of-hypoxic-volumes-and-dose-prescription
#7
Ana Ureba, Emely Lindblom, Alexandru Dasu, Johan Uhrdin, Aniek J G Even, Wouter van Elmpt, Philippe Lambin, Peter Wersäll, Iuliana Toma-Dasu
BACKGROUND: Tumour hypoxia is associated with increased radioresistance and poor response to radiotherapy. Pre-treatment assessment of tumour oxygenation could therefore give the possibility to tailor the treatment by calculating the required boost dose needed to overcome the increased radioresistance in hypoxic tumours. This study concerned the derivation of a non-linear conversion function between the uptake of the hypoxia-PET tracer (18)F-HX4 and oxygen partial pressure (pO2). MATERIAL AND METHODS: Building on previous experience with FMISO including experimental data on tracer uptake and pO2, tracer-specific model parameters were derived for converting the normalised HX4-uptake at the optimal imaging time point to pO2...
November 16, 2017: Acta Oncologica
https://www.readbyqxmd.com/read/29137853/antidiabetic-antihyperlipidemic-activities-and-herb-drug-interaction-of-a-polyherbal-formulation-in-streptozotocin
#8
Vishnu P Choudhari, Ketkee P Gore, Anil T Pawar
BACKGROUND: Ojamin (OJ), a polyherbal antidiabetic formulation, is extensively used as a food supplement to control diabetes alone or along with synthetic antidiabetic agents. However, it's phytochemical and pharmacological investigations are lacking. OBJECTIVE: The present study was undertaken to study antidiabetic and antihyperlipidemic potentials of OJ and its interaction with Metformin in streptozotocin (STZ)-induced diabetic rats. MATERIALS AND METHODS: Diabetes was induced in Wistar rats by single intraperitoneal (i...
November 11, 2017: Journal of Ayurveda and Integrative Medicine
https://www.readbyqxmd.com/read/29137803/dietary-fiber-intake-and-risk-of-metabolic-syndrome-a-meta-analysis-of-observational-studies
#9
Baozhu Wei, Yang Liu, Xuan Lin, Ying Fang, Jing Cui, Jing Wan
BACKGROUND & AIMS: Epidemiological studies show inconsistent findings on the association of dietary fiber intake with risk of metabolic syndrome (MetS). Herein, we aim to conduct a meta-analysis of published studies to determine the role of dietary fiber in prevention of MetS. METHODS: A systematical search in PubMed and Embase databases through December 2016, together with reference scrutiny of relevant literature, was performed to identify studies for inclusion...
October 31, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/29136248/determination-of-national-diagnostic-reference-levels-in-computed-tomography-examinations-of-iran-by-a-new-quality-control-based-dose-survey-method
#10
Mehdi Sohrabi, Masoumeh Parsi, Fereidoun Mianji
National diagnostic reference levels (NDRLs) of Iran were determined for the four most common CT examinations including head, sinus, chest and abdomen/pelvis. A new 'quality control (QC)-based dose survey method', as developed by us, was applied to 157 CT scanners in Iran (2014-15) with different slice classes, models and geographic spread across the country. The NDRLs for head, sinus, chest and abdomen/pelvis examinations are 58, 29, 12 and 14 mGy for CTDIVol and 750, 300, 300 and 650 mGy.cm for DLP, respectively...
November 10, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29136235/241am-be-%C3%AE-n-characterization-for-a-new-laboratory-facility-in-brazil
#11
W W Pereira, J J S Estrada, K C S Patrão, C F E Alves, L A G Magalhães, S P Leite
The Laboratório de Ciências Radiológicas is developing an irradiator for neutron survey meters calibration. Part of this work is related to the characterization of the neutron source that will be used in the irradiator. Therefore, a source of 241Am-Be(α,n) was characterized according to the following attributes: neutron energy distribution, anisotropy and emission rate. In order to make these values into high-level metrological references traceable by the Bureau International des Poids et Mesures, these measurements were taken at the Neutron Laboratory part of the Laboratório Nacional de Metrologia das Radiações Ionizantes...
November 9, 2017: Radiation Protection Dosimetry
https://www.readbyqxmd.com/read/29130484/the-bruton-s-tyrosine-kinase-inhibitor-prn473-inhibits-neutrophil-recruitment-via-inhibition-of-mac-1-signaling
#12
Jan M Herter, Andreas Margraf, Stephanie Volmering, Benedito Eduardo Correia, J Michael Bradshaw, Angelina Bisconte, Ronald J Hill, Claire L Langrish, Clifford A Lowell, Alexander Zarbock
BACKGROUND AND PURPOSE: Following inflammatory stimuli neutrophils are recruited to sites of inflammation and exert effector functions that often have deleterious effects on tissue integrity, which can lead to organ failure. Btk is expressed in neutrophils, and constitutes a promising pharmacological target for neutrophil mediated tissue damage. Here we evaluate a selective reversible inhibitor of the Bruton's tyrosine kinase (PRN473) for its ability to dampen neutrophil influx via inhibition of adhesion receptor signaling pathways...
November 11, 2017: British Journal of Pharmacology
https://www.readbyqxmd.com/read/29129738/timing-of-referral-and-characteristics-of-uninsured-medicaid-and-insured-patients-referred-to-the-outpatient-supportive-care-center-at-a-comprehensive-cancer-center
#13
Ahsan Azhar, Sriram Yennurajalingam, Aashraya Ramu, Haibo Zhang, Ali Haider, Janet L Williams, Seyedeh S Dibaj, Diane D Liu, Eduardo Bruera
CONTEXT: Low-income patients face barriers to palliative care access, which might negatively influence symptom management and advanced care planning. OBJECTIVE: Our aim was to compare time of referral and characteristics (level of symptom distress) among uninsured (indigent), low-insured (Medicaid), and insured patients presenting to our Supportive Care Center (SCC). METHODS: We conducted a retrospective review of randomly selected 100 indigent, 100 Medicaid and 300 insured outpatients referred during the same 5-year period...
November 9, 2017: Journal of Pain and Symptom Management
https://www.readbyqxmd.com/read/29129432/occurrence-and-human-exposure-to-brominated-and-organophosphorus-flame-retardants-via-indoor-dust-in-a-brazilian-city
#14
Joyce Cristale, Tiago Gomes Aragão Belé, Silvia Lacorte, Mary Rosa Rodrigues de Marchi
Indoor dust is considered an important human exposure route to flame retardants (FRs), which has arised concern due the toxic properties of some of these substances. In this study, ten organophosphorus flame retardants (OPFRs), eight polybrominated diphenyl ethers (PBDEs) and four new brominated flame retardants (NBFRs) were determined in indoor dust from different places in Araraquara-SP (Brazil). The sampled places included houses, apartments, offices, primary schools and cars. The analysis of the sample extracts was performed by gas chromatography coupled to mass spectrometry and two ionization techniques were used (electron ionization - EI; electron capture negative ionization - ECNI)...
November 9, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29129061/a-highly-sensitive-and-high-throughput-method-for-the-analysis-of-bisphenol-analogues-and-their-halogenated-derivatives-in-breast-milk
#15
Yumin Niu, Bin Wang, Yunfeng Zhao, Jing Zhang, Bing Shao
The structural analogs of bisphenol A (BPA) and their halogenated derivatives (together referred as BPs) have been found in environment, food and even human. Limited research showed that some of them exhibited similar to or even greater toxicities than BPA. Therefore, adverse effects on humans with low-dose in early life exposure were expected for BPs. Breast milk is an excellent matrix could reflect fetus and babies exposure to contaminants. Some of the emerging BPs may present with trace or ultra-trace levels in human...
November 13, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/29128760/vitamin-d-deficiency-in-children-with-recurrent-respiratory-infections-with-or-without-immunoglobulin-deficiency
#16
Nel Dąbrowska-Leonik, Ewa Bernatowska, Małgorzata Pac, Wiktor Filipiuk, Jan Mulawka, Barbara Pietrucha, Edyta Heropolitańska-Pliszka, Katarzyna Bernat-Sitarz, Beata Wolska-Kuśnierz, Bożena Mikołuć
PURPOSE: The objective of this study was to evaluate thevitamin D concentration in patients with recurrent respiratory infections with or without immunoglobulin G, A or M (IgG, IgA, IgM) deficiency, and to find a correlation between the vitamin D concentration and the response to hepatitis B vaccination. MATERIALS AND METHOD: The study involved 730 patients with recurrent respiratory infections. The concentration of 25-hydroxyvitamin D (25(OH)D), immunoglobulins G, A and M, anti-HBs was determined...
November 9, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/29127863/pharmacokinetics-of-dabigatran-etexilate-and-rivaroxaban-in-patients-with-short-bowel-syndrome-requiring-parenteral-nutrition-the-pder-pan-study
#17
Y Whitney Cheung, Stefano Barco, Ron A A Mathôt, Erik-Jan van den Dool, An K Stroobants, Mireille J Serlie, Saskia Middeldorp, Michiel Coppens
BACKGROUND AND AIMS: Patients on parenteral nutrition for short bowel syndrome (SBS) have a high risk of thrombotic complications and are often treated with parenteral anticoagulation. Direct oral anticoagulants are absorbed proximally in the digestive tract and may represent alternative regimens in selected SBS patients. In our pilot study, we provided pharmacokinetics parameters of dabigatran etexilate and rivaroxaban in this setting and compared peak (Cmax), trough (Ctrough) concentrations, and areas-under-the-concentration-time-curve (AUC0-t) to reference values retrieved from phase I-III studies...
November 4, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/29123201/insecticidal-effects-of-dsrna-targeting-the-diap1-gene-in-dipteran-pests
#18
Michelle Powell, Prashant Pyati, Min Cao, Howard Bell, John A Gatehouse, Elaine Fitches
The Drosophila melanogaster (fruit fly) gene Diap1 encodes a protein referred to as DIAP1 (D rosophila Inhibitor of Apoptosis Protein 1) that acts to supress apoptosis in "normal" cells in the fly. In this study we investigate the use of RNA interference (RNAi) to control two dipteran pests, Musca domestica and Delia radicum, by disrupting the control of apoptosis. Larval injections of 125-500 ng of Diap1 dsRNA resulted in dose-dependent mortality which was shown to be attributable to down-regulation of target mRNA...
November 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29121823/effect-of-tumor-necrosis-factor-alpha-dose-and-exposure-time-on-tumor-necrosis-factor-induced-gene-6-activation-by-neonatal-and-adult-mesenchymal-stromal-cells
#19
Shiva Hamidian Jahromi, Yunqing Li, John E Davies
Tumor necrosis factor (TNF)-stimulated gene 6 (TSG-6) is a major anti-inflammatory mediator released by activated mesenchymal stromal cells (MSCs). Neonatal MSCs are considered more metabolically active than cells derived from adult tissues, and potentially less heterogeneous. We hypothesized that a TNF-α activated neonatal MSC population (human umbilical cord perivascular cells-HUCPVCs) would show an enhanced level of TSG-6 activation compared to adult bone marrow MSCs (BMMSCs). Thus, we stimulated HUCPVCs, and both human and mouse BMMSCs with 1, 10, 50, and 100ng/mL of recombinant TNF-α over various exposure times...
November 9, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/29121640/the-influence-of-physical-activity-sedentary-behavior-on-health-related-quality-of-life-among-the-general-population-of-children-and-adolescents-a-systematic-review
#20
Xiu Yun Wu, Li Hui Han, Jian Hua Zhang, Sheng Luo, Jin Wei Hu, Kui Sun
BACKGROUND: The association between physical activity, sedentary behavior and health-related quality of life in children and adolescents has been mostly investigated in those young people with chronic disease conditions. No systematic review to date has synthesized the relationship between physical activity, sedentary behavior and health-related quality of life in the general healthy population of children and adolescents. The purpose of this study was to review systematically the existing literature that evaluated the relations between physical activity, sedentary behavior and health-related quality of life in the general population of children and adolescents...
2017: PloS One
keyword
keyword
45918
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"