| 1. |
- Freire, Sergio Miranda, et al.
(författare)
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Performance of XML Databases for Epidemiological Queries in Archetype-Based EHRs
- 2012
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Ingår i: Proceedings Scandinavian Conference on Health Informatics 2012. - Linköping : Linköping University Electronic Press. - 9789175197586 ; , s. 51-57
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Konferensbidrag (refereegranskat)abstract
- There are very few published studies regarding the performance of persistence mechanisms for systems that use the openEHR multi level modelling approach. This paper addresses the performance and size of XML databases that store openEHR compliant documents. Database size and response times to epidemiological queries are described. An anonymized relational epidemiology database and associated epidemiological queries were used to generate openEHR XML documents that were stored and queried in four opensource XML databases. The XML databases were considerably slower and required much more space than the relational database. For population-wide epidemiological queries the response times scaled in order of magnitude at the same rate as the number of records (total database size) but were orders of magnitude slower than the original relational database. For individual focused clinical queries where patient ID was specified the response times were acceptable. This study suggests that the tested XML database configurations without further optimizations are not suitable as persistence mechanisms for openEHR-based systems in production if population-wide ad hoc querying is needed.
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| 2. |
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| 3. |
- Kokkinakis, Dimitrios, 1965
(författare)
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Initial Experiments of Medication Event Extraction Using Frame Semantics
- 2012
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Ingår i: Scandinavian Conference on Health Informatics (SHI). - 1650-3740. - 9789175197586 ; Linköping Electronic Conference Proceedings, s. 41-47
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Konferensbidrag (refereegranskat)abstract
- Semantic annotation of text corpora for mining complex relations and events has gained a considerable growing attention in the medical domain. The goal of this paper is to present a snapshot of ongoing work that aims to develop and apply an appropriate infrastructure for automatic event labelling and extraction in the Swedish medical domain. Annotated text samples, appropriate lexical resources (e.g. term lists and the Swedish Frame-Net++) and hybrid techniques are currently developed in order to alleviate some of the difficulties of the task. As a case study this paper presents a pilot approach based on the application of the theory of frame semantics to automatically identify and extract detailed medication information from medical texts. Medication information is often written in narrative form (e.g. in clinical records) and is therefore difficult to be acquired and used in computerized systems (e.g. decision support). Currently our approach uses a combination of generic entity and terminology taggers, specifically designed medical frames and various frame-related patterns. Future work intends to improve and enhance current results by using more annotated samples, more medically-relevant frames and combination of supervised learning techniques with the regular expression patterns.
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| 4. |
- Krasniqi, Hanife, et al.
(författare)
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Web-based Knowledge Portals in Swedish Healthcare : Overview and Challenges
- 2012
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Ingår i: Scandinavian Conference on Health Informatics 2012. - : Linköping University Electronic Press. - 9789175197586 ; , s. 9-12
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Konferensbidrag (refereegranskat)abstract
- Healthcare organizations are increasingly becoming dependent on knowledge management activities to improve the quality of care, to maintain a high level of efficiency and innovation as well as to flexibly adapt to raid change. Utilizing knowledge management support systems - e.g. Internet based knowledge portals - to manage medical information and healthcare knowledge aimed to support the full spectrum of knowledge needs has become an important issue for all healthcare professionals. This paper reports on the main findings from analyzing the characteristics and challenges of 15 Swedish knowledge portals containing healthcare information. The analysis is based on inspection of the portals and interviews with their owners. The main challenges found concern fragmentation of knowledge, structuring of knowledge content, usability, interaction and resources for maintaining knowledge content. Future successful development and use of knowledge portals to disseminate healthcare knowledge depend on addressing these challenges, which requires portal owners to have a long-term strategy as well as a systematic way of working.
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