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https://www.readbyqxmd.com/read/28943809/an-audio-jack-based-electrochemical-impedance-spectroscopy-sensor-for-point-of-care-diagnostics
#1
Haowei Jiang, Alex Sun, A G Venkatesh, Drew A Hall
Portable and easy-to-use point-of-care (POC) diagnostic devices hold high promise for dramatically improving public health and wellness. In this paper, we present a mobile health (mHealth) immunoassay platform based on audio jack embedded devices, such as smartphones and laptops, that uses electrochemical impedance spectroscopy (EIS) to detect binding of target biomolecules. Compared to other biomolecular detection tools, this platform is intended to be used as a plug-and-play peripheral that reuses existing hardware in the mobile device and does not require an external battery, thereby improving upon its convenience and portability...
February 1, 2017: IEEE Sensors Journal
https://www.readbyqxmd.com/read/28942775/missed-diagnosis-of-cardiovascular-disease-in-outpatient-general-medicine-insights-from-malpractice-claims-data
#2
Gene R Quinn, Darrell Ranum, Ellen Song, Margarita Linets, Carol Keohane, Heather Riah, Penny Greenberg
BACKGROUND: Diagnostic errors are an underrecognized source of patient harm, and cardiovascular disease can be challenging to diagnose in the ambulatory setting. Although malpractice data can inform diagnostic error reduction efforts, no studies have examined outpatient cardiovascular malpractice cases in depth. A study was conducted to examine the characteristics of outpatient cardiovascular malpractice cases brought against general medicine practitioners. METHODS: Some 3,407 closed malpractice claims were analyzed in outpatient general medicine from CRICO Strategies' Comparative Benchmarking System database-the largest detailed database of paid and unpaid malpractice in the world-and multivariate models were created to determine the factors that predicted case outcomes...
October 2017: Joint Commission Journal on Quality and Patient Safety
https://www.readbyqxmd.com/read/28941871/accuracy-of-dermatoscopy-for-the-diagnosis-of-nonpigmented-cancers-of-the-skin
#3
Christoph Sinz, Philipp Tschandl, Cliff Rosendahl, Bengu Nisa Akay, Giuseppe Argenziano, Andreas Blum, Ralph P Braun, Horacio Cabo, Jean-Yves Gourhant, Juergen Kreusch, Aimilios Lallas, Jan Lapins, Ashfaq A Marghoob, Scott W Menzies, John Paoli, Harold S Rabinovitz, Christoph Rinner, Alon Scope, H Peter Soyer, Luc Thomas, Iris Zalaudek, Harald Kittler
BACKGROUND: Nonpigmented skin cancer is common, and diagnosis with the unaided eye is error prone. OBJECTIVE: To investigate whether dermatoscopy improves the diagnostic accuracy for nonpigmented (amelanotic) cutaneous neoplasms. METHODS: We collected a sample of 2072 benign and malignant neoplastic lesions and inflammatory conditions and presented close-up images taken with and without dermatoscopy to 95 examiners with different levels of experience...
September 20, 2017: Journal of the American Academy of Dermatology
https://www.readbyqxmd.com/read/28941192/taming-the-zebra-unravelling-the-barriers-to-diagnosing-aortic-dissection
#4
Joe-Anthony Rotella, Michael Yeoh
Aortic dissection is a lethal cardiovascular emergency that continues to pose a diagnostic dilemma to the emergency physician. The condition is rare, can present atypically and is associated with a cumulative mortality for every hour that passes. While it is a recognised differential of acute chest pain, its prevalence in comparison to other causes often leads to the diagnosis being overlooked. The ED is a busy environment with high patient turnover and varying degrees of complexity and acuity. This increases susceptibility to cognitive bias and error-producing conditions that can lead to delayed or missed diagnosis...
September 23, 2017: Emergency Medicine Australasia: EMA
https://www.readbyqxmd.com/read/28938132/development-and-validation-of-carbofuran-and-3-hydroxycarbofuran-analysis-by-high-pressure-liquid-chromatography-with-diode-array-detector-hplc-dad-for-forensic-veterinary-medicine
#5
Vagner Gonçalves, Nicolle Queiroz Hazarbassanov, Adriana de Siqueira, Jorge Camilo Florio, Claudia Helena Pastor Ciscato, Paulo Cesar Maiorka, Andre Fukushima, Helenice de Souza Spinosa
Agricultural pesticides used with the criminal intent to intoxicate domestic and wild animals are a serious concern in Veterinary Medicine. In order to identify the pesticide carbofuran and its metabolite 3- hydroxycarbofuran in animals suspected of exogenous intoxication a high pressure liquid chromatography with diode array detector (HPLC-DAD) method was developed and validated in stomach contents, liver, vitreous humor and blood. The method was evaluated using biological samples from seven different animal species...
September 14, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28937268/real-time-intra-procedural-18f-fdg-pet-ct-guided-biopsy-using-automated-robotic-biopsy-arm-ara-in-the-evaluation-of-thoracic-lesions-with-prior-inconclusive-biopsy-results
#6
Renjith Kalathoorakathu Radhakrishnan, Bhagwant Rai Mittal, Arun Kumar Reddy Gorla, Rajender Kumar Basher, Ashwani Sood, Amanjit Bal, Naveen Kalra, Niranjan Khandelwal, Navneet Singh, Digambar Behera
OBJECTIVE: The aim of this study was to assess the feasibility and appraise the diagnostic utility of real time 18F-FDG PET/CT guided biopsy under automated robotic biopsy arm (ARA) guidance for the evaluation of thoracic lesions with prior inconclusive biopsy results. METHODS: PET/CT guided biopsy of thoracic lesions was performed in patients who had at least one previous inconclusive biopsy. A total of 25 patients (Male: Female- 18 males, 7 females; Age: Range- 13-75; mean- 53...
September 20, 2017: British Journal of Radiology
https://www.readbyqxmd.com/read/28936618/defining-and-measuring-diagnostic-uncertainty-in-medicine-a-systematic-review
#7
Viraj Bhise, Suja S Rajan, Dean F Sittig, Robert O Morgan, Pooja Chaudhary, Hardeep Singh
BACKGROUND: Physicians routinely encounter diagnostic uncertainty in practice. Despite its impact on health care utilization, costs and error, measurement of diagnostic uncertainty is poorly understood. We conducted a systematic review to describe how diagnostic uncertainty is defined and measured in medical practice. METHODS: We searched OVID Medline and PsycINFO databases from inception until May 2017 using a combination of keywords and Medical Subject Headings (MeSH)...
September 21, 2017: Journal of General Internal Medicine
https://www.readbyqxmd.com/read/28935832/an-electronic-trigger-based-on-care-escalation-to-identify-preventable-adverse-events-in-hospitalised-patients
#8
Viraj Bhise, Dean F Sittig, Viralkumar Vaghani, Li Wei, Jessica Baldwin, Hardeep Singh
BACKGROUND: Methods to identify preventable adverse events typically have low yield and efficiency. We refined the methods of Institute of Healthcare Improvement's Global Trigger Tool (GTT) application and leveraged electronic health record (EHR) data to improve detection of preventable adverse events, including diagnostic errors. METHODS: We queried the EHR data repository of a large health system to identify an 'index hospitalization' associated with care escalation (defined as transfer to the intensive care unit (ICU) or initiation of rapid response team (RRT) within 15 days of admission) between March 2010 and August 2015...
September 21, 2017: BMJ Quality & Safety
https://www.readbyqxmd.com/read/28934255/quantitative-optical-coherence-tomography-angiography-of-macular-vascular-structure-and-foveal-avascular-zone-in-glaucoma
#9
Jaewan Choi, Junki Kwon, Joong Won Shin, Jiyun Lee, Saem Lee, Michael S Kook
OBJECTIVE: The study aimed to evaluate the quantitative characteristics of the macular vessel density (VD) and foveal avascular zone (FAZ) in glaucoma using optical coherence tomography angiography (OCT-A). DESIGN: Cross-sectional, age- and sex-matched case-control study. METHODS: Fifty-two eyes of 52 patients with primary open angle glaucoma and 52 eyes from 52 healthy participants were recruited retrospectively. OCT-A was performed on a 3 x 3-mm macular region centered on the fovea...
2017: PloS One
https://www.readbyqxmd.com/read/28926500/occipital-lobe-and-posterior-cingulate-perfusion-in-the-prediction-of-dementia-with-lewy-body-pathology-in-a-clinical-sample
#10
Angus M J Prosser, Livia Tossici-Bolt, Christopher M Kipps
OBJECTIVE: The aim of this study was to investigate the diagnostic value of occipital lobe and posterior cingulate perfusion in predicting dopamine transporter imaging outcome using a quantitative measure of analysis. PATIENTS AND METHODS: In total, 99 patients with cognitive complaints who had undergone both technetium-99m-hexamethylpropyleneamine oxime single-photon emission computed tomography (Tc-HMPAO SPECT) and I ioflupane (I-FP-CIT also called DaTSCAN) imaging in a dementia diagnostic center were analyzed...
September 18, 2017: Nuclear Medicine Communications
https://www.readbyqxmd.com/read/28925823/deep-learning-mr-imaging-based-attenuation-correction-for-pet-mr-imaging
#11
Fang Liu, Hyungseok Jang, Richard Kijowski, Tyler Bradshaw, Alan B McMillan
Purpose To develop and evaluate the feasibility of deep learning approaches for magnetic resonance (MR) imaging-based attenuation correction (AC) (termed deep MRAC) in brain positron emission tomography (PET)/MR imaging. Materials and Methods A PET/MR imaging AC pipeline was built by using a deep learning approach to generate pseudo computed tomographic (CT) scans from MR images. A deep convolutional auto-encoder network was trained to identify air, bone, and soft tissue in volumetric head MR images coregistered to CT data for training...
September 19, 2017: Radiology
https://www.readbyqxmd.com/read/28924570/implementation-and-ct-sampling-characterization-of-a-third-generation-spect-ct-system-for-dedicated-breast-imaging
#12
Jainil P Shah, Steve D Mann, Randolph L McKinley, Martin P Tornai
Stand-alone cone beam computed tomography (CT) and single-photon emission computed tomography (SPECT) systems capable of complex acquisition trajectories have previously been developed for breast imaging. Fully three-dimensional (3-D) motions of SPECT systems provide views into the chest wall and throughout the entire volume. The polar tilting capability of the CBCT system has shown improvement in sampling close to the chest wall, while eliminating cone beam artifacts. Here, a single hybrid SPECT-CT system, with each individual modality capable of independently traversing complex trajectories around a common pendant breast volume, was developed...
July 2017: Journal of Medical Imaging
https://www.readbyqxmd.com/read/28923433/the-association-between-symptoms-of-autism-and-neuropsychological-performance-in-females-with-anorexia-nervosa
#13
Heather Westwood, William Mandy, Kate Tchanturia
The aim of this study was to investigate the relationship between symptoms of autism spectrum disorder (ASD) and performance on measures of set-shifting and central coherence in a sample of females with anorexia nervosa (AN). Ninety-nine females aged 12-47, recruited from inpatient and day patient eating disorder services, were assessed with the Autism Diagnostic Observation Schedule, 2nd edition (ADOS-2), as well as the Wechsler Abbreviated Scale of Intelligence, 2nd edition (WASI-II); Wisconsin Card Sorting Test (WCST); Rey-Osterrieth Complex Figure Test (ROCFT) and self-report questionnaires assessing eating disorder pathology, depression, cognitive rigidity and attention to detail...
September 6, 2017: Psychiatry Research
https://www.readbyqxmd.com/read/28921588/integrating-prior-information-into-microwave-tomography-part-2-impact-of-errors-in-prior-information-on-microwave-tomography-image-quality
#14
Douglas Kurrant, Anastasia Baran, Joe LoVetri, Elise Fear
PURPOSE: The authors have developed a method to combine a patient-specific map of tissue structure and average dielectric properties with microwave tomography. The patient-specific map is acquired with radar-based techniques and serves as prior information for microwave tomography. The impact that the degree of structural detail included in this prior information has on image quality was reported in a previous investigation. The aim of the present study is to extend this previous work by identifying and quantifying the impact that errors in the prior information have on image quality, including the reconstruction of internal structures and lesions embedded in fibroglandular tissue...
September 17, 2017: Medical Physics
https://www.readbyqxmd.com/read/28919806/how-stable-are-quantitative-sensory-testing-measurements-over-time-report-on-10-week-reliability-and-agreement-of-results-in-healthy-volunteers
#15
Helen Nothnagel, Christian Puta, Thomas Lehmann, Philipp Baumbach, Martha B Menard, Brunhild Gabriel, Holger H W Gabriel, Thomas Weiss, Frauke Musial
BACKGROUND: Quantitative sensory testing (QST) is a diagnostic tool for the assessment of the somatosensory system. To establish QST as an outcome measure for clinical trials, the question of how similar the measurements are over time is crucial. Therefore, long-term reliability and limits of agreement of the standardized QST protocol of the German Research Network on Neuropathic Pain were tested. METHODS: QST on the lower back and hand dorsum (dominant hand) were assessed twice in 22 healthy volunteers (10 males and 12 females; mean age: 46...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28916249/diagnostic-errors-impact-of-an-educational-intervention-on-pediatric-primary-care
#16
Julianne Nemes Walsh, Margaret Knight, A James Lee
INTRODUCTION: The purpose of our study was to determine the impact of an educational program on a provider's knowledge related to diagnostic errors and diagnostic reasoning strategies. METHODS: A quasi-experimental interventional study with a multimedia approach, case study discussion, and trigger-generated medical record review at two time points was conducted. Measurement tools included a test developed by the National Patient Safety Foundation, Reducing Diagnostic Errors: Strategies for Solutions Quiz, additional diagnostic reasoning questions, and a trigger-generated process to analyze medical records...
September 12, 2017: Journal of Pediatric Health Care
https://www.readbyqxmd.com/read/28915255/scrambled-eggs-a-highly-sensitive-molecular-diagnostic-workflow-for-fasciola-species-specific-detection-from-faecal-samples
#17
Nichola Eliza Davies Calvani, Peter Andrew Windsor, Russell David Bush, Jan Šlapeta
BACKGROUND: Fasciolosis, due to Fasciola hepatica and Fasciola gigantica, is a re-emerging zoonotic parasitic disease of worldwide importance. Human and animal infections are commonly diagnosed by the traditional sedimentation and faecal egg-counting technique. However, this technique is time-consuming and prone to sensitivity errors when a large number of samples must be processed or if the operator lacks sufficient experience. Additionally, diagnosis can only be made once the 12-week pre-patent period has passed...
September 15, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28912133/use-of-crispr-modified-human-stem-cell-organoids-to-study-the-origin-of-mutational-signatures-in-cancer
#18
Jarno Drost, Ruben van Boxtel, Francis Blokzijl, Tomohiro Mizutani, Nobuo Sasaki, Valentina Sasselli, Joep de Ligt, Sam Behjati, Judith E Grolleman, Tom van Wezel, Serena Nik-Zainal, Roland P Kuiper, Edwin Cuppen, Hans Clevers
Mutational processes underlie cancer initiation and progression. Signatures of these processes in cancer genomes may explain cancer etiology, and hold diagnostic and prognostic value. Here, we develop a strategy that can be used to explore the origin of cancer-associated mutational signatures. We used CRISPR/Cas9 technology to delete key DNA repair genes in human colon organoids, followed by delayed sub-cloning and whole-genome sequencing. We found that mutation accumulation in organoids deficient in the mismatch repair gene MLH1 is driven by replication errors and accurately models the mutation profiles observed in mismatch repair-deficient colorectal cancers...
September 14, 2017: Science
https://www.readbyqxmd.com/read/28910160/a-novel-approach-to-the-differentiation-of-intrabulbar-tumors-in-color-doppler-imaging
#19
Monika Modrzejewska, Marta P Wiącek
AIM OF THE STUDY: The similarity of many benign intrabulbar lesions to a malignant tumor requires detailed differential diagnostics. However, none of the known methods can be used as the only one to determine the type of lesions. The aim of this study was to determine color Doppler imaging (CDI) markers characteristic of choroidal melanoma and metastatic intrabulbar tumors, increasing the diagnostic value and giving a new insight into the use of this method. MATERIALS AND METHODS: CDI was performed in 44 patients with malignant tumors and in 49 patients with benign tumors...
September 14, 2017: Current Eye Research
https://www.readbyqxmd.com/read/28906245/potential-audiological-and-mri-markers-of-tinnitus
#20
Kamakshi V Gopal, Binu P Thomas, Rajesh Nandy, Deng Mao, Hanzhang Lu
BACKGROUND: Subjective tinnitus, or ringing sensation in the ear, is a common disorder with no accepted objective diagnostic markers. PURPOSE: The purpose of this study was to identify possible objective markers of tinnitus by combining audiological and imaging-based techniques. RESEARCH DESIGN: Case-control studies. STUDY SAMPLE: Twenty adults drawn from our audiology clinic served as participants. The tinnitus group consisted of ten participants with chronic bilateral constant tinnitus, and the control group consisted of ten participants with no history of tinnitus...
September 2017: Journal of the American Academy of Audiology
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