Read by QxMD icon Read

Medical heuristics

Marcel Mlynczak, Ewa Migacz, Maciej Migacz, Wojciech Kukwa
OBJECTIVE: Sleep-disordered breathing is both a clinical and a social problem. This implies the need for convenient solutions to simplify screening and diagnosis. The aim of the study was to investigate the sensitivity and specificity of a novel wireless system in detecting breathing and snoring episodes during sleep. METHODS: A wireless acoustic sensor was elaborated and implemented. Segmentation (based on spectral thresholding and heuristics) and classification of all breathing episodes during recording were implemented through a mobile application...
November 29, 2016: IEEE Journal of Biomedical and Health Informatics
Loïc Le Folgoc, Hervé Delingette, Antonio Criminisi, Nicholas Ayache
We extend Bayesian models of non-rigid image registration to allow not only for the automatic determination of registration parameters (such as the trade-off between image similarity and regularization functionals), but also for a data-driven, multiscale, spatially adaptive parametrization of deformations. Adaptive parametrizations have been used with success to promote both the regularity and accuracy of registration schemes, but so far on non-probabilistic grounds - either as part of multiscale heuristics, or on the basis of sparse optimization...
November 9, 2016: Medical Image Analysis
Michael W Kenyhercz, Alexandra R Klales, Christopher W Rainwater, Sara M Fredette
Recently, Hefner and Ousley (2014) introduced the optimized summed scored attributes (OSSA) method that maximizes between-group differences in U.S. black and white populations by dichotomizing six cranial morphoscopic trait scores. This study tests OSSA using an independent skeletal sample (Hamann-Todd, n = 208) and positively identified forensic cases (Mercyhurst University, n = 28, and New York City Office of Chief Medical Examiner, n = 38). An evaluation of trait frequencies suggests shifting the heuristically selected sectioning point separating U...
November 11, 2016: Journal of Forensic Sciences
Robin Root, Arnau van Wyngaard, Alan Whiteside
We draw on a study of a church run community home-based care organization in Swaziland to explore how individuals living with HIV perceived caregivers' impact on wellbeing. Our primary concern was to examine how religion, as a heuristic practice of Christian-based caregiving, was felt to be consequential in a direly underserved region. Part of a larger medical anthropological project, we conducted semi-structured interviews with 79 CHBC clients, of whom half (53%) said they would have died, some from suicide, without its services...
November 15, 2016: Medical Anthropology
Moritz E Wigand, Fabian U Lang, Thomas Becker, Thomas G Schulze, Werner Strik, Markus Jäger
BACKGROUND: Despite several previous attempts at subtyping schizophrenia, a typology that reflects neurobiological knowledge and reliably predicts course and outcome is lacking. We applied the system-specific concept of the Bern Psychopathology Scale (BPS) to generate a course typology based on three domains: language, affectivity, and motor behaviour. SAMPLING AND METHODS: A cohort of 100 patients with schizophrenia or schizoaffective disorders according to DSM-IV criteria underwent psychopathological assessment, and all their available medical records were retrospectively analysed on the basis of the BPS...
November 9, 2016: Psychopathology
Guillaume Broc, Kamel Gana, Quentin Denost, Bruno Quintard
Surgeons are experiencing difficulties implementing recommendations not only owing to incomplete, confusing or conflicting information but also to the increasing involvement of patients in decisions relating to their health. This study sought to establish which common factors including heuristic factors guide surgeons' decision-making in colon and rectal cancers. We conducted a systematic literature review of surgeons' decision-making factors related to colon and rectal cancer treatment. Eleven of 349 identified publications were eligible for data analyses...
August 16, 2016: Psychology, Health & Medicine
Ignacio Atal, Jean-David Zeitoun, Aurélie Névéol, Philippe Ravaud, Raphaël Porcher, Ludovic Trinquart
BACKGROUND: Clinical trial registries may allow for producing a global mapping of health research. However, health conditions are not described with standardized taxonomies in registries. Previous work analyzed clinical trial registries to improve the retrieval of relevant clinical trials for patients. However, no previous work has classified clinical trials across diseases using a standardized taxonomy allowing a comparison between global health research and global burden across diseases...
2016: BMC Bioinformatics
Yanshan Wang, Stephen Wu, Dingcheng Li, Saeed Mehrabi, Hongfang Liu
In the era of digitalization, information retrieval (IR), which retrieves and ranks documents from large collections according to users' search queries, has been popularly applied in the biomedical domain. Building patient cohorts using electronic health records (EHRs) and searching literature for topics of interest are some IR use cases. Meanwhile, natural language processing (NLP), such as tokenization or Part-Of-Speech (POS) tagging, has been developed for processing clinical documents or biomedical literature...
September 1, 2016: Journal of Biomedical Informatics
Dominik A Ettlin, Isabelle Sommer, Ben Brönnimann, Sergio Maffioletti, Jörg Scheidt, Mei-Yin Hou, Nenad Lukic, Beat Steiger
BACKGROUND: Medical symptoms independent of body location burden individuals to varying degrees and may require care by more than one expert. Various paper and computer-based tools exist that aim to comprehensively capture data for optimal clinical management and research. METHODS: A web-based interdisciplinary symptom evaluation (WISE) was newly designed, constructed, and technically implemented. For worldwide applicability and to avoid copyright infringements, open source software tools and free validated questionnaires available in multiple languages were used...
December 2016: Journal of Headache and Pain
Steffen Moritz, Gerit Pfuhl, Thies Lüdtke, Mahesh Menon, Ryan P Balzan, Christina Andreou
OBJECTIVES: We outline a two-stage heuristic account for the pathogenesis of the positive symptoms of psychosis. METHODS: A narrative review on the empirical evidence of the liberal acceptance (LA) account of positive symptoms is presented. HYPOTHESIS: At the heart of our theory is the idea that psychosis is characterized by a lowered decision threshold, which results in the premature acceptance of hypotheses that a nonpsychotic individual would reject...
July 7, 2016: Journal of Behavior Therapy and Experimental Psychiatry
Reza Khajouei, Misagh Zahiri Esfahani, Yunes Jahani
OBJECTIVE: There are several user-based and expert-based usability evaluation methods that may perform differently according to the context in which they are used. The objective of this study was to compare 2 expert-based methods, heuristic evaluation (HE) and cognitive walkthrough (CW), for evaluating usability of health care information systems. MATERIALS AND METHODS: Five evaluators independently evaluated a medical office management system using HE and CW. We compared the 2 methods in terms of the number of identified usability problems, their severity, and the coverage of each method...
August 7, 2016: Journal of the American Medical Informatics Association: JAMIA
Andrew M Redd, Adi V Gundlapalli, Guy Divita, Marjorie E Carter, Le-Thuy Tran, Matthew H Samore
RATIONALE: Templates in text notes pose challenges for automated information extraction algorithms. We propose a method that identifies novel templates in plain text medical notes. The identification can then be used to either include or exclude templates when processing notes for information extraction. METHODS: The two-module method is based on the framework of information foraging and addresses the hypothesis that documents containing templates and templates within those documents can be identified by common features...
August 3, 2016: Journal of Biomedical Informatics
Álvaro Mendes, Liliana Abreu, Maria Rui Vilar-Correia, Júlio Borlido-Santos
This paper explores the health information-seeking practices of healthy young adults and how they assess and rank sources of information through a qualitative study. The findings show that participants (a) are strongly committed to searching for information about health and lifestyle, especially via the Internet; (b) healthcare professionals were perceived as the most reliable source of health information and advice; (c) online health information, although frequently accessed and experienced as empowering, is seen as a potentially unreliable source...
August 2, 2016: Health Communication
Boaz Gedaliahu Samolsky Dekel, Alberto Gori, Alessio Vasarri, Maria Cristina Sorella, Gianfranco Di Nino, Rita Maria Melotti
Biased pain evaluation due to automated heuristics driven by symptom uncertainty may undermine pain treatment; medical evidence moderators are thought to play a role in such circumstances. We explored, in this cross-sectional survey, the effect of such moderators (e.g., nurse awareness of patients' pain experience and treatment) on the agreement between n = 862 inpatients' self-reported pain and n = 115 nurses' pain ratings using a numerical rating scale. We assessed the mean of absolute difference, agreement (κ-statistics), and correlation (Spearman rank) of inpatients and nurses' pain ratings and analyzed congruence categories' (CCs: underestimation, congruence, and overestimation) proportions and dependence upon pain categories for each medical evidence moderator (χ (2) analysis)...
2016: Pain Research & Management: the Journal of the Canadian Pain Society
R Mathew, N Davies, J Manthorpe, S Iliffe
OBJECTIVE: Decision-making, when providing care and treatment for a person with dementia at the end of life, can be complex and challenging. There is a lack of guidance available to support practitioners and family carers, and even those experienced in end of life dementia care report a lack of confidence in decision-making. It is thought that the use of heuristics (rules of thumb) may aid decision-making. The aim of this study is to identify whether heuristics are used in end of life dementia care, and if so, to identify the context in which they are being used...
2016: BMJ Open
Yue Wen, Jennie Si, Xiang Gao, Stephanie Huang, He Huang
This brief presents a novel application of adaptive dynamic programming (ADP) for optimal adaptive control of powered lower limb prostheses, a type of wearable robots to assist the motor function of the limb amputees. Current control of these robotic devices typically relies on finite state impedance control (FS-IC), which lacks adaptability to the user's physical condition. As a result, joint impedance settings are often customized manually and heuristically in clinics, which greatly hinder the wide use of these advanced medical devices...
July 11, 2016: IEEE Transactions on Neural Networks and Learning Systems
Tokunbo Ajayi, Jerome Okudo
Insufficient clinical data from patients is a major cause of errors in medical diagnostics. In an attempt to make a diagnosis, initial clinical information provided to the physician may be overly relied on as the only information required in making diagnosis leading to anchoring. Failure to rely on differential diagnoses in spite of new signs and symptoms or rethinking of initial hypothesis may lead to fixation on a certain diagnosis, which may lead to significant morbidity and mortality. In the event that there is an anchoring heuristic, like in our patient, it is important to consider differential diagnoses; however, it is not wrong to rely on some form of anchor...
2016: Case Reports in Medicine
Mattias Georgsson, Nancy Staggers
Patient-centeredness is an important concept in diabetes treatment. We modified Nielsen's expert heuristic evaluation method addressing common gaps: a patient perspective and variability in findings. Two expert, dual-domain evaluators referred to validated patient profiles (mild, moderate, severe diabetes) when conducting uniform evaluation processes on a diabetes mHealth system. Evaluators found 103 usability problems and 224 heuristic violations. For 69% of the problems, the profiles had an effect on severity ratings...
2016: Studies in Health Technology and Informatics
Rebecca Schnall, Suzanne Bakken, William Brown Iii, Alex Carballo-Dieguez, Sarah Iribarren
Mobile health (mHealth) applications (apps) have the potential to support self-management and improve health outcomes in persons living with HIV (PLWH). In this paper, we report on the final step in a three-stage user-centered design process for the development of a mHealth app for PLWH. We conducted a usability evaluation with 10 targeted end-users and a heuristic evaluation with 5 persons with informatics expertise to assess the usability of a prototype mHealth app for PLWH to manage their health. At the end of our usability evaluation, we finalized a Design Document that included the user interface design and functional specifications of the mHealth app...
2016: Studies in Health Technology and Informatics
Ian A Meinertzhagen
The brain is a network of neurons, one that generates behaviour, and knowing the former is crucial to understanding the latter. Identifying the exact network of synaptic connections, or connectome, of the fly's central nervous system is now a major objective in Drosophila neurobiology, one that has been initiated in several laboratories, especially the Janelia Research Campus of the Howard Hughes Medical Institute. Progress is most advanced in the optic neuropiles of the visual system. The effort to derive a connectome from these and other neuropile regions is proceeding by various methods of electron microscopy, especially focused-ion beam milling scanning electron microscopy, and relies upon - but is to be carefully distinguished from - published light microscopic methods that reveal the projections of genetically labelled cell types...
June 2016: Journal of Neurogenetics
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"