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Clinical Densitometry

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https://www.readbyqxmd.com/read/28712984/quantitative-computed-tomography-current-status-and-new-developments
#1
Klaus Engelke
This review focuses on new developments and current controversies in the field of quantitative computed tomography. Recent positions of the International Society for Clinical Densitometry acknowledged the clinical value of quantitative computed tomography of the spine and the hip using clinical whole-body computed tomography (CT) scanners. Opportunistic screening summarizes a number of new approaches describing the dual use of clinical CT scans. For example, CT scans may have been taken for tumor diagnosis but may also be used for the prediction of high or low fracture risks as an additional benefit for the patient...
July 13, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28711461/prevalence-of-comorbidities-in-rheumatoid-arthritis-and-evaluation-of-their-monitoring-in-clinical-practice-the-spanish-cohort-of-the-comora-study
#2
Alejandro Balsa, Leticia Lojo-Oliveira, Mercedes Alperi-López, María García-Manrique, Carmen Ordóñez-Cañizares, Lorena Pérez, Virginia Ruiz-Esquide, Alfonso Corrales, Javier Narváez, José Rey-Rey, Carlos Rodríguez-Lozano, Soledad Ojeda, Santiago Muñoz-Fernández, Joan M Nolla, José García-Torrón, Fernando Gamero, Rosario García-Vicuña, Blanca Hernández-Cruz, José Campos, José Rosas, José Francisco García-Llorente, Antonio Gómez-Centeno, Rafael Cáliz, Raimon Sanmartí, Alberto Bermúdez, Lydia Abasolo-Alcázar, Antonio Fernández-Nebro, Luis Rodríguez-Rodríguez, Carlos Marras, Miguel Ángel González-Gay, Ihsane Hmamouchi, Emilio Martín-Mola
OBJECTIVES: To describe the prevalence of comorbidities in patients with RA in Spain and discuss their management and implications using data from the Spanish cohort of the multinational study on COMOrbidities in Rheumatoid Arthritis (COMORA). METHODS: This is a national sub-analysis of the COMORA study. We studied the demographics and disease characteristics of 200 adults patients diagnosed with RA (1987 ACR), and routine practices for screening and preventing the following selected comorbidities: cardiovascular, infections, cancer, gastrointestinal, pulmonary, osteoporosis and depression...
July 12, 2017: Reumatología Clinica
https://www.readbyqxmd.com/read/28708200/periacetabular-bone-densitometry-after-total-hip-arthroplasty-with-highly-porous-titanium-cups-a-2-year-follow-up-prospective-study
#3
Leo Massari, Alessandro Bistolfi, Pier Paolo Grillo, Alda Borré, Gaetano Gigliofiorito, Carlotta Pari, Andrea Francescotto, Piermario Tosco, Davide Deledda, Laura Ravera, Araldo Causero
INTRODUCTION: Trabecular Titanium is an advanced cellular solid structure, composed of regular multiplanar hexagonal interconnected cells that mimic the morphology of the trabecular bone. This biomaterial demonstrated improved mechanical properties and enhanced osteoinduction and osteoconduction in several in vitro and in vivo studies. The aim of this study was to assess Trabecular Titanium osseointegration by measuring periacetabular changes in bone mineral density (BMD) with dual-emission X-ray absorptiometry (DEXA)...
July 1, 2017: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
https://www.readbyqxmd.com/read/28702661/clinically-approved-pegylated-nanoparticles-are-covered-by-a-protein-corona-that-boosts-the-uptake-by-cancer-cells
#4
M Papi, D Caputo, V Palmieri, R Coppola, S Palchetti, F Bugli, C Martini, L Digiacomo, D Pozzi, G Caracciolo
Today, liposomes are an advanced technology of drug carriers with a dozen drugs in clinical practice and many more in clinical trials. A bottleneck associated with the clinical translation of liposomes has long been 'opsonization', i.e. the adsorption of plasma proteins at the liposome surface resulting in their rapid clearance from circulation. For decades, the most popular way to avoid opsonization has been grafting polyethylene glycol (PEG) onto the liposome surface. Recent studies have clarified that grafting PEG onto the liposome surface reduces, but does not completely prevent protein binding...
July 12, 2017: Nanoscale
https://www.readbyqxmd.com/read/28662973/assessment-of-bone-mineral-density-at-the-distal-femur-and-the-proximal-tibia-by-dual-energy-x-ray-absorptiometry-in-individualswith-spinal-cord-injury-precision-of-protocol-and-relation-to-injury-duration
#5
Stacey Lobos, Anne Cooke, Gillian Simonett, Chester Ho, Steven K Boyd, W Brent Edwards
Spinal cord injury (SCI) is characterized by marked bone loss at the knee, and there is a need for established dual-energy X-ray absorptiometry (DXA) protocols to examine bone mineral density (BMD) at this location to track therapeutic progress and to monitor fracture risk. The purpose of this study was to quantify the precision and reliability of a DXA protocol for BMD assessment at the distal femur and the proximal tibia in individuals with SCI. The protocol was subsequently used to investigate the relationship between BMD and duration of SCI...
June 26, 2017: Journal of Clinical Densitometry
https://www.readbyqxmd.com/read/28650253/diagnosis-and-treatment-of-osteoporosis-before-and-after-fracture-a-side-by-side-analysis-of-commercially-insured-and-medicare-advantage-osteoporosis-patients
#6
Jessica Weaver, Shiva Sajjan, E Michael Lewiecki, Steven T Harris
BACKGROUND: Although treatment for osteoporosis is recommended by U.S. clinical guidelines, a lack of diagnosis and treatment is common among patients with osteoporotic fractures. OBJECTIVE: To determine the rates of osteoporosis diagnosis and treatment before and after various types of fractures. METHODS: This was a retrospective claims analysis using data from the Humana Medicare Advantage claims (Medicare group) and Optum Insight Clinformatics Data Mart commercial claims (Commercial group)...
July 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28643464/adiponectin-isoform-patterns-in-ethnic-specific-adipoq-mutation-carriers-the-iras-family-study
#7
Keri L Tabb, Chuan Gao, Pamela J Hicks, Gregory A Hawkins, Jerome I Rotter, Yii-Der Ida Chen, Xiuqing Guo, Jill M Norris, Carlos Lorenzo, Barry I Freedman, Donald W Bowden, Nicholette D Palmer
OBJECTIVE: Adiponectin is found in human serum in three groups of multimers (high molecular weight [HMW], medium molecular weight [MMW], and low molecular weight [LMW]). Two ethnic-specific variants in ADIPOQ, G45R (Hispanic-Americans) and R55C (African-Americans), were previously reported. Although carriers of both variants had mean adiponectin levels ≤ 20% of those of noncarriers, they were not clinically different from noncarriers. To compare carriers of both variants and noncarriers, relative quantification of adiponectin isoforms to total adiponectin was performed on serum samples...
June 23, 2017: Obesity
https://www.readbyqxmd.com/read/28634907/incidence-and-predictors-of-repeat-bone-mineral-densitometry-a-longitudinal-cohort-study
#8
Emily C White VanGompel, Peter Franks, John A Robbins, Joshua J Fenton
BACKGROUND: Existing guidelines for repeat screening and treatment monitoring intervals regarding the use of dual-energy x-ray absorptiometry (DXA) scans are conflicting or lacking. The Choosing Wisely campaign recommends against repeating DXA scans within 2 years of initial screening. It is unclear how frequently physicians order repeat scans and what clinical factors contribute to their use. OBJECTIVE: To estimate cumulative incidence and predictors of repeat DXA for screening or treatment monitoring in a regional health system...
June 20, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/28630785/assessment-of-corneal-densitometry-in-rheumatoid-arthritis-patients
#9
Mustafa Alpaslan Anayol, Başak Bostancı, Mehmet Ali Şekeroğlu, Mert Şimşek, Süleyman Günaydın, Pelin Yılmazbaş
OBJECTIVES: To evaluate corneal densitometry and anterior segment parameters of rheumatoid arthritis (RA) patients and compare these results with those of age-matched healthy control subjects. MATERIALS AND METHODS: Anterior segment parameters and corneal densitometry of patients with RA and healthy control subjects were assessed by Scheimpflug corneal topography. For densitometry analysis, the 12-mm diameter area of the cornea was subdivided into four concentric radial zones and anterior, central, and posterior layers based on corneal depth...
June 2017: Turkish Journal of Ophthalmology
https://www.readbyqxmd.com/read/28629885/-prevalence-of-osteoporosis-estimation-of-probability-of-fracture-and-bone-metabolism-study-in-patients-with-newly-diagnosed-prostate-cancer-in-the-health-area-of-lugo
#10
Jonatan Miguel-Carrera, Carlos García-Porrua, Francisco Javier de Toro Santos, Jose Antonio Picallo-Sánchez
OBJECTIVE: To study the prevalence of osteoporosis and fracture probability in patients diagnosed with prostate cancer. DESIGN: Observational descriptive transversal study. SITE: Study performed from Primary Care of Lugo in collaboration with Rheumatology and Urology Services of our referral hospital. PARTICIPANTS: Patients diagnosed with prostate cancer without bone metastatic disease from January to December 2012. MAIN MEASUREMENTS: Epidemiologic, clinical, laboratory and densitometric variables involved in osteoporosis were collected...
June 16, 2017: Atencion Primaria
https://www.readbyqxmd.com/read/28625918/body-composition-by-dxa
#11
John A Shepherd, Bennett K Ng, Markus J Sommer, Steven B Heymsfield
Body composition measurements from DXA have been available since DXA technology was developed 30years ago, but are historically underutilized. Recently, there have been rapid developments in body composition assessment including the analysis and publication of representative data for the US, official usage guidance from the International Society for Clinical Densitometry, and development of regional body composition measures with clinical utility. DXA body composition is much more than whole body percent fat...
June 16, 2017: Bone
https://www.readbyqxmd.com/read/28616759/is-dual-semitendinosus-allograft-stronger-than-turndown-for-achilles-tendon-reconstruction-an-in-vitro-analysis
#12
Michael C Aynardi, Lara C Atwater, Roshan Melvani, Brent G Parks, Adrian G Paez, Stuart D Miller
BACKGROUND: Large Achilles tendon defects pose a treatment challenge. The standard treatment with a turndown flap requires a large extensile incision, puts the sural nerve at risk, and demands slow, careful rehabilitation. Dual allograft semitendinosus reconstruction is a new clinical alternative that has the theoretical advantages of a smaller incision, less dissection, and a stronger construct that may allow for faster rehabilitation. QUESTIONS/PURPOSES: In a cadaver biomechanical model, we compared the dual allograft semitendinosus reconstruction with the myofascial turndown in terms of (1) mechanical strength and resistance to deformation and (2) failure mechanisms in reconstruction of large segmental Achilles defects...
June 14, 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28612553/-obesity-and-bone-mineral-density-in-menopausal-women
#13
Kang An, Ken Qin, She-Yu Li, Han-Wei Yang, Qin-Qin Wu, Yan Huang, Chuan Yu, Zhen-Mei An, Shuang-Qing Li
OBJECTIVES: To determine the association between obesity and bone mineral density in menopausal women. METHODS: We recruited menopausal women aged 50 years and older who undertook health examinations in West China Hospital of Sichuan University in this study. Bone mineral density of the participants was measured by MetriScan Bone Densitometry. The participants were categorized into three groups according to the T value: normal density, osteopenia and osteoporosis...
January 2017: Sichuan da Xue Xue Bao. Yi Xue Ban, Journal of Sichuan University. Medical Science Edition
https://www.readbyqxmd.com/read/28611211/metabolic-and-neuroprotective-effects-of-dapagliflozin-and-liraglutide-in-diabetic-mice
#14
Paul Millar, Nupur Pathak, Vadivel Parthsarathy, Anthony J Bjourson, Maurice O'Kane, Varun Pathak, R Charlotte Moffett, Peter R Flatt, Victor A Gault
This study assessed the metabolic and neuroprotective actions of the sodium glucose co-transporter-2 inhibitor dapagliflozin in combination with the GLP-1 agonist liraglutide in dietary-induced diabetic mice. Mice administered low-dose streptozotocin (STZ) on a high fat diet received dapagliflozin, liraglutide, dapagliflozin-plus-liraglutide (DAPA-Lira) or vehicle once-daily over 28 days. Energy intake, body weight, glucose and insulin concentrations were measured at regular intervals. Glucose tolerance, insulin sensitivity, hormone and biochemical analysis, dual-energy x-ray absorptiometry densitometry, novel object recognition, islet and brain histology were examined...
June 13, 2017: Journal of Endocrinology
https://www.readbyqxmd.com/read/28599895/variations-in-resting-energy-expenditure-impact-on-gestational-weight%C3%A2-gain
#15
E K Berggren, P O'Tierney-Ginn, S Lewis, L Presley, S Hauguel De-Mouzon, P M Catalano
BACKGROUND: There are significant variations in gestational weight gain, with many women gaining in excess of the Institute of Medicine guidelines. Unfortunately, efforts to improve appropriate gestational weight gain have had only limited success. To date, interventions have focused primarily on decreasing energy intake and/or increasing physical activity. Maternal resting energy expenditure, which comprises ∼60% of total energy expenditure compared with the ∼20% that comes from physical activity, may be an important consideration in understanding variations in gestational weight gain...
June 17, 2017: American Journal of Obstetrics and Gynecology
https://www.readbyqxmd.com/read/28587786/the-history-of-bone-densitometry
#16
Paul D Miller
Bone densitometry (dual energy x-ray absorptiometry-DXA) is a vital medical tool needed for the diagnosis of osteoporosis in non-fractured patients; predicting future fracture risk; and monitoring bone mineral density (BMD) in untreated or treated patients. The history of the pivotal international society involved in the science and clinical interpretation of DXA, the International Society for Clinical Densitometry (ISCD) is defined in this manuscript. Since DXA and Osteoporosis management are intimately linked, the ISCD has over the years developed strong bonds with both the National Osteoporosis Foundation (NOF) and the International Osteoporosis Foundation (IOF)...
June 3, 2017: Bone
https://www.readbyqxmd.com/read/28564701/the-impact-of-lens-opacity-on-sd-oct-retinal-nerve-fiber-layer-and-bruch-s-membrane-opening-measurements-using-the-anatomical-positioning-system-aps
#17
Matthias M Mauschitz, Felix Roth, Frank G Holz, Monique M B Breteler, Robert P Finger
Purpose: To evaluate the impact of lens opacity on retinal nerve fiber layer thickness (RNFLT) and Bruch's membrane opening (BMO) measurements. Methods: Fifty-nine randomly selected patients without any other relevant ocular pathology undergoing elective routine cataract surgery in two specialized eye clinics were enrolled. RNFLT, BMO area, and BMO minimum rim width (BMO-MRW) were assessed with the Heidelberg Engineering Spectralis OCT using the anatomical positioning system (APS) prior to and 1 day after cataract surgery using a ring scan at different eccentricities of the disc (3...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28552661/30years-of-dxa-technology-innovations
#18
Claus-C Glüer
As the successor of Dual Photon Absorptiometry (DPA), Dual X-ray Absorptiometry (DXA) has seen 30years of continuous technological innovations. Implementation of measures for standardization and quality assurance made DXA a reliable and clinically useful approach. Its use in clinical multicenter drug studies in osteoporosis lead to general acceptance as the standard technique of bone densitometry. The limitations of DXA are well established. As a measure of areal bone mineral density (aBMD) it depends on bone size and is biased by overlaying soft tissue and calcified structures...
May 24, 2017: Bone
https://www.readbyqxmd.com/read/28548312/vitamin-d-dependent-rickets-type-1b-25-hydroxylase-deficiency-a-rare-condition-or-a-misdiagnosed-condition
#19
Arnaud Molin, Arnaud Wiedemann, Nick Demers, Martin Kaufmann, Jérémy Do Cao, Laurent Mainard, Brigitte Dousset, Pierre Journeau, Geneviève Abeguile, Nadia Coudray, Hervé Mittre, Nicolas Richard, Georges Weryha, Arthur Sorlin, Glenville Jones, Marie-Laure Kottler, Francois Feillet
Vitamin D requires a two-step activation by hydroxylation: The first step is catalyzed by hepatic 25-hydroxylase (CYP2R1, 11p15.2) and the second one is catalyzed by renal 1α-hydroxylase (CYP27B1, 12q13.1), which produces the active hormonal form of 1,25-(OH)2 D. Mutations of CYP2R1 have been associated with vitamin D-dependent rickets type 1B (VDDR1B), a very rare condition that has only been reported to affect 4 families to date. We describe 7 patients from 2 unrelated families who presented with homozygous loss-of-function mutations of CYP2R1...
May 26, 2017: Journal of Bone and Mineral Research: the Official Journal of the American Society for Bone and Mineral Research
https://www.readbyqxmd.com/read/28539676/results-from-polish-spondyloarthritis-initiative-registry-polspi-methodology-and-data-from-the-first-year-of-observation
#20
Zofia Guła, Tacjana Barczyńska, Marek Brzosko, Jerzy Gąsowski, Sławomir Jeka, Katarzyna Jodłowska-Cicio, Beata Kwaśny-Krochin, Piotr Leszczyński, Łukasz Lubiński, Katarzyna Łosińska, Katarzyna Pawlak-Buś, Hanna Przepiera-Będzak, Włodzimierz Samborski, Małgorzata Schlabs, Maciej Siedlar, Dorota Sikorska, Jerzy Świerkot, Małgorzata Węgierska, Piotr Wiland, Mariusz Korkosz
OBJECTIVES: Report on one-year results from the Polish Spondyloarthritis Initiative registry (PolSPI), containing the cross-sectional analysis of clinical and imaging data as well as database methodology. MATERIAL AND METHODS: The PolSPI registry includes patients with axial (axSpA) and peripheral (perSpA) spondyloarthritis according to ASAS classification criteria, and/or patients with ankylosing spondylitis according to modified New York criteria, psoriatic arthritis according to CASPAR criteria, arthropathy in inflammatory bowel disease, reactive arthritis, juvenile spondyloarthritis or undifferentiated spondyloarthritis...
2017: Reumatologia
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