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Diagnostic tests

Paolo Fusar-Poli, Grazia Rutigliano, Daniel Stahl, André Schmidt, Valentina Ramella-Cravaro, Shetty Hitesh, Philip McGuire
Importance: Pretest risk estimation is routinely used in clinical medicine to inform further diagnostic testing in individuals with suspected diseases. To our knowledge, the overall characteristics and specific determinants of pretest risk of psychosis onset in individuals undergoing clinical high risk (CHR) assessment are unknown. Objectives: To investigate the characteristics and determinants of pretest risk of psychosis onset in individuals undergoing CHR assessment and to develop and externally validate a pretest risk stratification model...
October 26, 2016: JAMA Psychiatry
Tomas Maria Perez-Porcuna, Hélio Doyle Pereira-da-Silva, Carlos Ascaso, Adriana Malheiro, Samira Bührer, Flor Martinez-Espinosa, Rosa Abellana
INTRODUCTION: For adequate disease control the World Health Organization has proposed the diagnosis and treatment of latent tuberculous infection (LTBI) in groups of risk of developing the disease such as children. There is no gold standard (GS) test for the diagnosis of LTBI. The objective of this study was to estimate the prevalence of LTBI in young children in contact with a household case of tuberculosis (TB-HCC) and determine the accuracy and precision of the Tuberculin Skin Test (TST) and QuantiFERON-TB Gold in-tube (QFT) used in the absence of a GS...
2016: PloS One
Andrew B Rosenkrantz, James S Babb, Samir S Taneja, Justin M Ream
Purpose To test the impact of existing Prostate Imaging Reporting and Data System (PI-RADS) version 2 (V2) decision rules, as well as of proposed adjustments to these decision rules, on detection of Gleason score (GS) 7 or greater (GS ≥7) prostate cancer. Materials and Methods Two radiologists independently provided PI-RADS V2 scores for the dominant lesion on 343 prostate magnetic resonance (MR) examinations. Diagnostic performance for GS ≥7 tumor was assessed by using MR imaging-ultrasonography fusion-targeted biopsy as the reference...
October 26, 2016: Radiology
Adrien Contejean, Virginie Lemiale, Matthieu Resche-Rigon, Djamel Mokart, Frédéric Pène, Achille Kouatchet, Julien Mayaux, François Vincent, Martine Nyunga, Fabrice Bruneel, Antoine Rabbat, Pierre Perez, Anne-Pascale Meert, Dominique Benoit, Rebecca Hamidfar, Michael Darmon, Mercé Jourdain, Anne Renault, Benoît Schlemmer, Elie Azoulay
BACKGROUND: Acute respiratory failure (ARF) is the most frequent complication in patients with hematological malignancies and is associated with high morbidity and mortality. ARF etiologies are numerous, and despite extensive diagnostic workflow, some patients remain with undetermined ARF etiology. METHODS: This is a post-hoc study of a prospective multicenter cohort performed on 1011 critically ill hematological patients. Relationship between ARF etiology and hospital mortality was assessed using a multivariable regression model adjusting for confounders...
December 2016: Annals of Intensive Care
Alessandro Lamorte, Enrico Boero, Paola Crida, Abdul R Conteh, Marco Foletti, Paolo Narcisi
BACKGROUND: Diagnostic tools available in low-income countries are often really basic even if patients can be as sick as those of the richer countries. Point-of-care ultrasound could be a solution for this problem. We studied the impact of ultrasound at the Holy Spirit Hospital, Makeni, Sierra Leone. METHODS: This is a prospective, observational study on outpatients presenting at the HSH. We enrolled continually for 1 month 105 patients asked for ultrasound examination by the caring physician that had to indicate the differential diagnosis hypothesized, the confidence degree about these on a 5-point Likert scale, and the therapy before and after the US...
December 2016: Critical Ultrasound Journal
Gianluca Pontone, Giuseppe Muscogiuri, Daniele Andreini, Andrea I Guaricci, Marco Guglielmo, Saima Mushtaq, Andrea Baggiano, Edoardo Conte, Virginia Beltrama, Andrea Annoni, Alberto Formenti, Elisabetta Mancini, Mark G Rabbat, Mauro Pepi
The increased number of patients with coronary artery disease (CAD) in developed countries is of great clinical relevance and involves a large burden of the healthcare system. The management of these patients is focused on relieving symptoms and improving clinical outcomes. Therefore the ideal test would provide the correct diagnosis and actionable information. To this aim, several non-invasive functional imaging modalities are usually used as gatekeeper to invasive coronary angiography (ICA), but their diagnostic yield remains low with limited accuracy when compared to obstructive CAD at the time of ICA or invasive fractional flow reserve (FFR)...
December 2016: Current Treatment Options in Cardiovascular Medicine
Si Cheng, Jie Sun, Junxing Yang, Jianqiang Lv, Feng Wu, Yanxing Lin, Lishan Liao, Yiyou Ye, Chenfu Cao, Liurong Fang, Qunyi Hua
A fast and ultrasensitive test-strip system combining quantum dots (QDs) with a lateral-flow immunoassay strip (LFIAS) was established for detection of Peste des petits ruminants virus (PPRV) antibody. The highly luminescent water-soluble carboxyl-functionalized QDs were used as the signal output and were conjugated to streptococcal protein G (SPG), which was capable of binding to immunoglobulin G (IgG) from many species through an amide bond to capture the target PPRV IgGs. The PPRV N protein, which was immobilized on the detection zone of the test strip, was expressed by transfecting recombinant Bacmid-PPRV-N with Lipofect into Sf9 insect cells...
October 25, 2016: Analytical and Bioanalytical Chemistry
Erika D Sears, Peter R Swiatek, Hechuan Hou, Kevin C Chung
BACKGROUND: The purpose of this study was to evaluate the impact of insurance type on use of diagnostic testing, treatments, and the efficiency of care for patients with carpal tunnel syndrome. METHODS: The 2009 to 2013 Truven MarketScan Databases were used to identify adult patients with carpal tunnel syndrome. Insurance type was categorized as fee-for-service versus capitated managed care. Multivariable regression models were created to evaluate the relationship between insurance type and costs, number of visits, treatment, and electrodiagnostic study use, and controlling for demographic characteristics and comorbidities...
November 2016: Plastic and Reconstructive Surgery
Da Qin Zhan, Xing Chen, Rong Wang, Jing Zhang, Dan Yu Zhao, Shu Jing Zhang, Zhi Feng Wang, Rui Jun Ma, Bo Hou
BACKGROUND/AIMS: To evaluate the diagnostic significance of appendiceal orifice inflammation (AOI) in ulcerative colitis (UC) patients. MATERIALS AND METHODS: We retrospectively examined data from patients with colitis from May 2010 to January 2014 and assigned them to two groups: UC cases and specific colitis cases. First, we clarified the difference in the AOI+ rate between the two groups. Thereafter, imaging findings of all the patients with colitis were re-examined...
September 2016: Turkish Journal of Gastroenterology: the Official Journal of Turkish Society of Gastroenterology
Wilson Bautista-Molano, Robert B M Landewé, Cesar Serna, Rafael Valle-Oñate, Désirée van der Heijde
OBJECTIVES: To evaluate the patients' characteristics associated with the clinical decision to request SI-MRI and/or HLA-B27 in patients with SpA in daily practice. METHODS: Patients referred to a rheumatology outpatient-clinic in a national referral-centre were selected. Patients with a clinical diagnosis of SpA according to the rheumatologist were included. SI-MRI and HLA-B27 was available for patients in whom the rheumatologists had ordered these tests. Characteristics associated with ordering SI-MRI or HLA-B27 were identified with univariable analyses...
October 26, 2016: Clinical and Experimental Rheumatology
Chuan Zhou, Heang-Ping Chan, Lubomir M Hadjiiski, Aamer Chughtai, Jun Wei, Ella A Kazerooni
PURPOSE: The authors are developing an automated method to identify the best-quality coronary arterial segment from multiple-phase coronary CT angiography (cCTA) acquisitions, which may be used by either interpreting physicians or computer-aided detection systems to optimally and efficiently utilize the diagnostic information available in multiple-phase cCTA for the detection of coronary artery disease. METHODS: After initialization with a manually identified seed point, each coronary artery tree is automatically extracted from multiple cCTA phases using our multiscale coronary artery response enhancement and 3D rolling balloon region growing vessel segmentation and tracking method...
October 2016: Medical Physics
Xiao-Jun Xu, Hong-Sheng Wang, Xiu-Li Ju, Pei-Fang Xiao, Yan Xiao, Hong-Man Xue, Hong-Yu Shi, Yi-Jin Gao, Guo-Cun Jia, Xue-Rong Li, Wei-Hong Zhao, Ning-Ling Wang, Yong-Min Tang
BACKGROUND: Hemophagocytic lymphohistiocytosis (HLH) is a heterogeneous disease with major diagnostic and therapeutic difficulties. A large-scale multicenter study of pediatric HLH is still lacking in China. PROCEDURE: The Histiocytosis Study Group of the Chinese Pediatric Society conducted this retrospective study in 2014. A total of 323 patients diagnosed with HLH between 2011 and 2013 from 12 hospitals were registered. RESULTS: The median age at diagnosis was 2...
October 26, 2016: Pediatric Blood & Cancer
Oscar A Debats, Ansje S Fortuin, Hanneke J M Meijer, Thomas Hambrock, Geert J S Litjens, Jelle O Barentsz, Henkjan J Huisman
OBJECTIVES: The key to MR lymphography is suppression of T2* MR signal in normal lymph nodes, while retaining high signal in metastatic nodes. Our objective is to quantitatively compare the ability of ferumoxtran-10 and ferumoxytol to suppress the MR signal in normal pelvic lymph nodes. METHODS: In 2010, a set of consecutive patients who underwent intravenous MR Lymphography (MRL) were included. Signal suppression in normal lymph nodes in T2*-weighted images due to uptake of USPIO (Ultra-Small Superparamagnetic Particles of Iron Oxide) was quantified...
2016: PeerJ
Randall C Edgell, Ahmed E Sarhan, Jazba Soomro, Collin Einertson, Joanna Kemp, Peyman Shirani, Theodore K Malmstrom, Jeroen Coppens
BACKGROUND: Central nervous system vasculitis (CNSV) is a rare disorder, the pathophysiology of which is not fully understood. It involves a combination of inflammation and thrombosis. CNSV is most commonly associated with headache, gradual changes in mental status, and focal neurological symptoms. Diagnosis requires the effective use of history, laboratory testing, imaging, and biopsy. Catheter angiography can be a powerful tool in the diagnosis when common and low-frequency angiographic manifestations of CNSV are considered...
September 2016: Interventional Neurology
Jae Geun Park, Ki Bae Kim, Joung Ho Han, Soon Man Yoon, Hee Bok Chae, Sei Jin Youn, Seon Mee Park
Background/Aims: EUS can detect bile duct stones (BDS) that are undetectable on multidetector computed tomography (MDCT). BDS associated with acute biliary pancreatitis (ABP) are small and tend to be excreted spontaneously. This study evaluated the usefulness of early EUS in patients with ABP and undetectable BDS on MDCT. Methods: Forty-one patients with ABP and undetectable BDS on MDCT underwent EUS within 24 hours of admission and were diagnosed with BDS, sludge, dilated common bile duct (CBD), or normal CBD...
October 25, 2016: Korean Journal of Gastroenterology, Taehan Sohwagi Hakhoe Chi
Mitra Saadatian-Elahi, Stanley Plotkin, Kingston H G Mills, Scott A Halperin, Peter B McIntyre, Valentina Picot, Jacques Louis, David R Johnson
Despite long-standing vaccination programs, substantial increases in reported cases of pertussis have been described in several countries during the last 5years. Cases among very young infants who are at greatest risk of pertussis-related hospitalizations and mortality are the most alarming. Multiple hypotheses including but not limited to the availability of more sensitive diagnostic tests, greater awareness, and waning vaccine-induced immunity over time have been posited for the current challenges with pertussis...
October 22, 2016: Vaccine
Hao Zhang, Xiao-Nian Zhang, Hui-Li Zhang, Liang Huang, Qian-Qian Chi, Xin Zhang, Xiao-Ping Yun
PURPOSE: To investigate the profiles of cognitive impairment through Montreal Cognitive Assessment (MoCA) and Mini-Mental State Examination (MMSE) in patients with chronic traumatic brain injury (TBI) or stroke and to evaluate the sensitivity of the two scales in patients with TBI. METHODS: In this cohort study, a total of 230 patients were evaluated, including TBI group (n = 103) and stroke group (n = 127). The cognitive functions of two groups were evaluated by designated specialists using MoCA (Beijing version) and MMSE (Chinese version)...
October 1, 2016: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
Jan M Sargeant, Annette M O'Connor
Meta-analysis, the statistical combination of results from multiple studies, can be used to summarize all of the available research on an intervention, etiology, descriptive, or diagnostic test accuracy question. Meta-analysis should be conducted as a component of a systematic review, to increase transparency in the selection of studies and to incorporate an evaluation of the risk of bias in the individual studies included in the meta-analysis. The process of meta-analysis may include a forest plot to graphically display the study results and the calculation of a weighted average summary effect size...
October 2016: Microbiology Spectrum
Loren Fields, Alison Hathaway
Pregnancy of unknown location (PUL) is a descriptive term for when a woman with a positive pregnancy test has a transvaginal ultrasound that cannot determine the site of the pregnancy. While the majority of women with PUL are subsequently diagnosed with a spontaneous abortion or viable intrauterine pregnancy, 7% to 20% of these women have an ectopic pregnancy. The potential for morbidity and mortality related to an ectopic pregnancy means that considerable care is necessary in the evaluation and management of women with PUL...
October 25, 2016: Journal of Midwifery & Women's Health
Erik Iwarsson, Bo Jacobsson, Jessica Dagerhamn, Thomas Davidson, Eduardo Bernabé, Marianne Heibert Arnlind
INTRODUCTION: To review the performance of non-invasive prenatal testing (NIPT) for detection of trisomy 21, 18 and 13 (T21, T18 and T13) in a general pregnant population as well as to update the data on high-risk pregnancies. MATERIAL AND METHODS: Systematic Review and Meta-Analysis. PubMed, Embase and the Cochrane Library were searched. Methodological quality was rated using QUADAS and scientific evidence using GRADE. Summary measures of diagnostic accuracy were calculated using a bivariate random-effects model...
October 25, 2016: Acta Obstetricia et Gynecologica Scandinavica
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