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Lario R, Soley R, White S, Butler J, Del Fiol G, Eilbeck K, Huff S, Kawamoto K. The Business Process Management for Healthcare (BPM+ Health) Consortium: motivation, methodology, and deliverables for enabling clinical knowledge interoperability (CKI). J Am Med Inform Assoc 2024; 31:797-808. [PMID: 38237123 PMCID: PMC10990521 DOI: 10.1093/jamia/ocad242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 11/09/2023] [Accepted: 12/01/2023] [Indexed: 04/05/2024] Open
Abstract
OBJECTIVES To enhance the Business Process Management (BPM)+ Healthcare language portfolio by incorporating knowledge types not previously covered and to improve the overall effectiveness and expressiveness of the suite to improve Clinical Knowledge Interoperability. METHODS We used the BPM+ Health and Object Management Group (OMG) standards development methodology to develop new languages, following a gap analysis between existing BPM+ Health languages and clinical practice guideline knowledge types. Proposal requests were developed based on these requirements, and submission teams were formed to respond to them. The resulting proposals were submitted to OMG for ratification. RESULTS The BPM+ Health family of languages, which initially consisted of the Business Process Model and Notation, Decision Model and Notation, and Case Model and Notation, was expanded by adding 5 new language standards through the OMG. These include Pedigree and Provenance Model and Notation for expressing epistemic knowledge, Knowledge Package Model and Notation for supporting packaging knowledge, Shared Data Model and Notation for expressing ontic knowledge, Party Model and Notation for representing entities and organizations, and Specification Common Elements, a language providing a standard abstract and reusable library that underpins the 4 new languages. DISCUSSION AND CONCLUSION In this effort, we adopted a strategy of separation of concerns to promote a portfolio of domain-agnostic, independent, but integrated domain-specific languages for authoring medical knowledge. This strategy is a practical and effective approach to expressing complex medical knowledge. These new domain-specific languages offer various knowledge-type options for clinical knowledge authors to choose from without potentially adding unnecessary overhead or complexity.
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Affiliation(s)
- Robert Lario
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT 84112-5775, United States
| | - Richard Soley
- Object Management Group, Milford, MA 01757, United States
| | - Stephen White
- BPM Advantage Consulting, Inc, Irvine, CA 92620, United States
| | - John Butler
- Auxiliumtg, LLC, Mount Airy, MD 21771, United States
| | - Guilherme Del Fiol
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT 84112-5775, United States
| | - Karen Eilbeck
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT 84112-5775, United States
| | - Stanley Huff
- Graphite Health, Inc, Albuquerque, NM, 87109, United States
| | - Kensaku Kawamoto
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT 84112-5775, United States
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Lario R, Kawamoto K, Sottara D, Eilbeck K, Huff S, Del Fiol G, Soley R, Middleton B. A method for structuring complex clinical knowledge and its representational formalisms to support composite knowledge interoperability in healthcare. J Biomed Inform 2023; 137:104251. [PMID: 36400330 DOI: 10.1016/j.jbi.2022.104251] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2022] [Revised: 10/08/2022] [Accepted: 11/11/2022] [Indexed: 11/17/2022]
Abstract
INTRODUCTION The use and interoperability of clinical knowledge starts with the quality of the formalism utilized to express medical expertise. However, a crucial challenge is that existing formalisms are often suboptimal, lacking the fidelity to represent complex knowledge thoroughly and concisely. Often this leads to difficulties when seeking to unambiguously capture, share, and implement the knowledge for care improvement in clinical information systems used by providers and patients. OBJECTIVES To provide a systematic method to address some of the complexities of knowledge composition and interoperability related to standards-based representational formalisms of medical knowledge. METHODS Several cross-industry (Healthcare, Linguistics, System Engineering, Standards Development, and Knowledge Engineering) frameworks were synthesized into a proposed reference knowledge framework. The framework utilizes IEEE 42010, the MetaObject Facility, the Semantic Triangle, an Ontology Framework, and the Domain and Comprehensibility Appropriateness criteria. The steps taken were: 1) identify foundational cross-industry frameworks, 2) select architecture description method, 3) define life cycle viewpoints, 4) define representation and knowledge viewpoints, 5) define relationships between neighboring viewpoints, and 6) establish characteristic definitions of the relationships between components. System engineering principles applied included separation of concerns, cohesion, and loose coupling. RESULTS A "Multilayer Metamodel for Representation and Knowledge" (M*R/K) reference framework was defined. It provides a standard vocabulary for organizing and articulating medical knowledge curation perspectives, concepts, and relationships across the artifacts created during the life cycle of language creation, authoring medical knowledge, and knowledge implementation in clinical information systems such as electronic health records (EHR). CONCLUSION M*R/K provides a systematic means to address some of the complexities of knowledge composition and interoperability related to medical knowledge representations used in diverse standards. The framework may be used to guide the development, assessment, and coordinated use of knowledge representation formalisms. M*R/K could promote the alignment and aggregated use of distinct domain-specific languages in composite knowledge artifacts such as clinical practice guidelines (CPGs).
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Affiliation(s)
- Robert Lario
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, United States
| | - Kensaku Kawamoto
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, United States
| | | | - Karen Eilbeck
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, United States
| | - Stanley Huff
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, United States; Graphite Health, Salt Lake City, UT, United States
| | - Guilherme Del Fiol
- Department of Biomedical Informatics, University of Utah, Salt Lake City, UT, United States
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Melovitz-Vasan C, White A, Huff S, Vasan N. Hypogenetic right lung with partial anomalous pulmonary venous return and accessory diaphragm: a case of "scimitar lung". Folia Morphol (Warsz) 2022; 82:980-987. [PMID: 36472398 DOI: 10.5603/fm.a2022.0098] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 12/12/2022]
Abstract
Partial anomalous pulmonary venous return (PAPVR) is a rare congenital cardiovascular condition in which some of the pulmonary veins drain into the systemic circulation. We report on the cadaveric dissection of a 71-year-old Caucasian male donor who died of chronic obstructive pulmonary disease with hypertension. We noted a faint incisional scar on the thorax extending from the parasternal region at the 4th intercostal level to the midaxillary line. Since the straight-line incision followed the ribs and the scar was quite faint, surgery probably occurred when the donor was young. We also observed numerous surgical interventions of the heart, lungs, and vasculature to correct various defects. The morphology of the heart was normal, but was shifted more to the right side. An atrial septal defect (ASD) was closed with sutures. The right superior pulmonary vein that drained into the superior vena cava (SVC) was ligated close to the SVC and the right inferior, left superior, and inferior pulmonary veins all drained directly into the left atrium. We noticed a dilated coronary sinus entering the right atrium adjacent to the ASD; the ostium of the coronary sinus noticeably lacked the normal valve-like structure. We initially thought the right lung was a "horseshoe" lung, but realised that it was a "hypogenetic" lung with PAPVR and an accessory diaphragm. Compared to the left, the right secondary bronchi were much narrower and branched uncharacteristically, as seen in hypogenetic lung syndrome. The inferior lobe was highly disorganised, severely hypoplastic, and exhibited uncharacteristic morphology. The superior bronchopulmonary segment was markedly hypoplastic. The posterior and medial basal segments were not only hypoplastic and slender, but also extended like a tail to the left pulmonary cavity behind the heart/pericardium and in front of the oesophagus and aorta. The right lung, though hypoplastic, demonstrated patent bronchi and the lobes were inflatable. Based on the hypogenetic lung and PAPVR, we conclude that the donor exhibited 'scimitar' lung.
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Affiliation(s)
- C Melovitz-Vasan
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, United States.
| | - A White
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, United States
| | - S Huff
- Rowan University, Glassboro, New Jersey, United States
| | - N Vasan
- Department of Biomedical Sciences, Cooper Medical School of Rowan University, Camden, New Jersey, United States
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Haug PJ, Narus SP, Bledsoe J, Huff S. Promoting national and international standards to build interoperable clinical applications. AMIA Annu Symp Proc 2018; 2018:555-563. [PMID: 30815096 PMCID: PMC6371249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
During the last decade, software supporting healthcare delivery has proliferated. This software can be divided into electronic medical record (EHR) systems and applications that treat EHRs as platforms. These collect, manage, and interpret medical data, thereby adding value to associated EHRs. To reduce the burden of developing for multiple EHR platforms, a group of standards has evolved that allow software written for one vendor's EHR to be introduced into settings supported by other vendors. The Health Services Platform Consortium (HSPC) is a collaborative effort to advocate for standards that will make healthcare applications truly interoperable. In this document, we discuss the approach adopted by the consortium and the standards central to this approach. We discriminate between interoperability standards that support the plug-and-play transfer of applications from one vendor's EHR to another and knowledge portability standards that allow knowledge artifacts used in one software environment to be introduced effectively in others.
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Affiliation(s)
- Peter J Haug
- Intermountain Healthcare, Salt Lake City, Utah
- University of Utah, Salt Lake City, Utah
| | - Scott P Narus
- Intermountain Healthcare, Salt Lake City, Utah
- University of Utah, Salt Lake City, Utah
| | - Joseph Bledsoe
- Intermountain Healthcare, Salt Lake City, Utah
- University of Utah, Salt Lake City, Utah
| | - Stanley Huff
- Intermountain Healthcare, Salt Lake City, Utah
- University of Utah, Salt Lake City, Utah
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Slight SP, Berner ES, Galanter W, Huff S, Lambert BL, Lannon C, Lehmann CU, McCourt BJ, McNamara M, Menachemi N, Payne TH, Spooner SA, Schiff GD, Wang TY, Akincigil A, Crystal S, Fortmann SP, Vandermeer ML, Bates DW. Metadata Correction: Meaningful Use of Electronic Health Records: Experiences From the Field and Future Opportunities. JMIR Med Inform 2015; 3:e32. [PMID: 26407141 PMCID: PMC5823614 DOI: 10.2196/medinform.5160] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2015] [Indexed: 11/29/2022] Open
Affiliation(s)
- Sarah Patricia Slight
- Division of Pharmacy, School of Medicine Pharmacy and Health, Durham University, Durham, United Kingdom
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Slight SP, Berner ES, Galanter W, Huff S, Lambert BL, Lannon C, Lehmann CU, McCourt BJ, McNamara M, Menachemi N, Payne TH, Spooner SA, Schiff GD, Wang TY, Akincigil A, Crystal S, Fortmann SP, Bates DW. Meaningful Use of Electronic Health Records: Experiences From the Field and Future Opportunities. JMIR Med Inform 2015; 3:e30. [PMID: 26385598 PMCID: PMC4704893 DOI: 10.2196/medinform.4457] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 06/02/2015] [Accepted: 07/24/2015] [Indexed: 11/20/2022] Open
Abstract
Background With the aim of improving health care processes through health information technology (HIT), the US government has promulgated requirements for “meaningful use” (MU) of electronic health records (EHRs) as a condition for providers receiving financial incentives for the adoption and use of these systems. Considerable uncertainty remains about the impact of these requirements on the effective application of EHR systems. Objective The Agency for Healthcare Research and Quality (AHRQ)-sponsored Centers for Education and Research in Therapeutics (CERTs) critically examined the impact of the MU policy relating to the use of medications and jointly developed recommendations to help inform future HIT policy. Methods We gathered perspectives from a wide range of stakeholders (N=35) who had experience with MU requirements, including academicians, practitioners, and policy makers from different health care organizations including and beyond the CERTs. Specific issues and recommendations were discussed and agreed on as a group. Results Stakeholders’ knowledge and experiences from implementing MU requirements fell into 6 domains: (1) accuracy of medication lists and medication reconciliation, (2) problem list accuracy and the shift in HIT priorities, (3) accuracy of allergy lists and allergy-related standards development, (4) support of safer and effective prescribing for children, (5) considerations for rural communities, and (6) general issues with achieving MU. Standards are needed to better facilitate the exchange of data elements between health care settings. Several organizations felt that their preoccupation with fulfilling MU requirements stifled innovation. Greater emphasis should be placed on local HIT configurations that better address population health care needs. Conclusions Although MU has stimulated adoption of EHRs, its effects on quality and safety remain uncertain. Stakeholders felt that MU requirements should be more flexible and recognize that integrated models may achieve information-sharing goals in alternate ways. Future certification rules and requirements should enhance EHR functionalities critical for safer prescribing of medications in children.
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Affiliation(s)
- Sarah Patricia Slight
- Division of Pharmacy, School of Medicine Pharmacy and Health, Durham University, Durham, United Kingdom
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Kawakami TG, Buckley P, Huff S, McKain D, Fielding H. A comparative study in vitro of a simian virus isolated from spontaneous woolly monkey fibrosarcoma and of a known feline fibrosarcoma virus. Bibl Haematol 2015; 39:236-43. [PMID: 4360156 DOI: 10.1159/000427847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Vu AL, Dee MM, Gualandi RJ, Huff S, Zale J, Gwinn KD, Ownley BH. First Report of Leaf Spot Caused by Bipolaris spicifera on Switchgrass in the United States. Plant Dis 2011; 95:1191. [PMID: 30732027 DOI: 10.1094/pdis-10-10-0774] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Light-to-dark brown leaf spots and general chlorosis were observed on 'Alamo' switchgrass (Panicum virgatum L.) grown in ornamental plantings on the campus of the University of Tennessee in Knoxville in December 2007. Disease distribution was patchy, infecting ~10% of plants. Patches had mild to severely infected plants with stunting in areas of severe infection. Symptomatic leaf tissue was surface sterilized, air dried on sterile filter paper, and plated on 2% water agar amended with 10 mg/liter of rifampicin (Sigma-Aldrich, St. Louis, MO) and 10 μl/liter of 2.4 EC Danitol miticide (Valent Chemical, Walnut Creek, CA). Plates were incubated at 26°C in darkness for 5 days. A sporulating, dematiaceous mitosporic fungus was observed and transferred to potato dextrose agar (PDA). Conidiophores were single, light brown, multiseptate, mostly straight, polytretic, geniculate, and sympodial. Conidia were 17.5 × 12 (22) to 30 × 14 (12.5) μm, oval, light brown, and distoseptate, with one to three septa and a flattened hilum on the basal cell. Conidia germinated from both poles. The causal agent was identified as Bipolaris spicifera (Bainier) Subram. Morphological features were as described for B. spicifera (2). Pathogenicity studies were conducted with 5-week-old 'Alamo' switchgrass plants grown from surface-sterilized seed in 9 × 9-cm pots containing 50% ProMix Potting and Seeding Mix (Premier Tech Horticulture, Rivière-du-Loup, Québec, Canada) and 50% Turface ProLeague (Profile Products, Buffalo Grove, IL) (vol/vol). Ten replicate pots with ~20 plants each were sprayed with a spore suspension of 4.5 × 106 spores/ml of sterile water prepared from 6-day-old cultures grown on PDA. Plants were subjected to high humidity for 45 h then incubated at 25/20°C with a 12-h photoperiod in a growth chamber. Leaf spot symptoms similar to the original disease appeared on plants in each of the 10 replicate pots 6 days postinoculation. Lesions were excised from leaves, surface sterilized, plated on water agar, and the resulting cultures were again identified as B. spicifera. The internal transcribed spacer (ITS) region of ribosomal DNA from the original isolate used for inoculation and the reisolated culture recovered from plants in the pathogenicity studies were amplified with PCR using primers ITS4 and ITS5 (3). PCR amplicons of ~560 bp were obtained from both isolates and sequenced. Amplicon sequences were identical and the sequence was submitted to GenBank (Accession No. HQ015445). The DNA sequence had 100% homology to the ITS sequence of B. spicifera strain NRRL 47508 (GenBank Accession No. GU183125.1) that had been isolated from sorghum seed. To our knowledge, leaf spot caused by B. spicifera has not been described on switchgrass (1). B. spicifera can be seedborne and has been reported on turfgrass seed exported from the United States to Korea (2). As switchgrass is transitioned from a prairie grass to a biofuels crop planted in large acreages, disease incidences and severities will likely increase, necessitating rapid disease identification and cost effective management strategies. References: (1) D. F. Farr and A. Y. Rossman. Fungal Databases. Systematic Mycology and Microbiology Laboratory, ARS, USDA. Retrieved from http://nt.ars-grin.gov/fungaldatabases/ , 4 August 2010. (2) H.-M. Koo et al. Plant Pathol. J. 19:133, 2003. (3) T. J. White et al. Page 315 in: PCR Protocols: A Guide to Methods and Applications. M. A. Innis et al., eds, Academic Press, San Diego, 1990.
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Affiliation(s)
- A L Vu
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville 37996
| | - M M Dee
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville 37996
| | - R J Gualandi
- Department of Plant Sciences, The University of Tennessee, Knoxville 37996
| | - S Huff
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville 37996
| | - J Zale
- Department of Plant Sciences, The University of Tennessee, Knoxville 37996
| | - K D Gwinn
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville 37996
| | - B H Ownley
- Department of Entomology and Plant Pathology, The University of Tennessee, Knoxville 37996
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Baumann T, Huff S, Schäfer AO, Langer M. Einfluss der b-Wert-Auswahl auf den ADC bei Patienntinnen mit Ovarialkarzinomrezidiv. ROFO-FORTSCHR RONTG 2010. [DOI: 10.1055/s-0030-1252764] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Ghaemmaghami C, Huff S, Plautz CM, Braithwaite S, Woods WA. Longitudinal Educational Tracks in an Emergency Medicine Residency Curriculum. Acad Emerg Med 2007. [DOI: 10.1197/j.aem.2007.03.1318] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Affiliation(s)
- Richard Lenz
- Institute of Medical Informatics, Philipps-University Marburg, Bunsenstr. 3, Marburg 35037, Germany.
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Grotta JC, Chiu D, Lu M, Patel S, Levine SR, Tilley BC, Brott TG, Haley EC, Lyden PD, Kothari R, Frankel M, Lewandowski CA, Libman R, Kwiatkowski T, Broderick JP, Marler JR, Corrigan J, Huff S, Mitsias P, Talati S, Tanne D. Agreement and variability in the interpretation of early CT changes in stroke patients qualifying for intravenous rtPA therapy. Stroke 1999; 30:1528-33. [PMID: 10436095 DOI: 10.1161/01.str.30.8.1528] [Citation(s) in RCA: 184] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND AND PURPOSE Ischemic changes identified on CT scans performed in the first few hours after stroke onset, which are thought to possibly represent early cytotoxic edema and development of irreversible injury, may have important implications for subsequent treatment. However, insecurity and conflicting data exist over the ability of clinicians to correctly recognize and interpret these changes. We performed a detailed review of selected baseline CT scans from the NINDS rt-PA Stroke Trial to test agreement among experienced stroke specialists and other physicians on the presence of early CT ischemic changes. METHODS Seventy baseline CT scans from the NINDS Stroke Trial were read and classified for the presence or absence of various early findings of ischemia by 16 individuals, including NINDS trial investigators, other neurologists, other emergency medicine physicians, and radiology or stroke fellows. CT scans included normal scans and scans from patients who later developed symptomatic intracranial hemorrhage, as well as scans on which the NINDS rt-PA Stroke Trial neuroradiologist identified clear-cut early CT changes. For each CT finding, kappa-statistics were used to assess the proportion of agreement beyond chance. RESULTS kappa-Values (95% confidence interval [CI]) ranged from 0.20 (-0.20, 0.61) (fair agreement) to 0.41 (0.37, 0.45) (moderate agreement) among the 16 viewers, and the kappa-value was only 0.39 (0.29, 0.49) (fair) in answer to the question "do early CT changes involve more than one third of the MCA [middle cerebral artery] territory?" There was substantial variability within each specialty group and between groups. kappa-Values were only fair to moderate even among physicians experienced in selecting and treating acute stroke patients with rtPA. Observed agreement ranged from 68% to 85%. Physicians agreed on the finding of early CT changes involving >33% of the MCA territory 77% of the time, although the kappa-value of 0.39 suggested only moderate agreement beyond chance. CONCLUSIONS There is considerable lack of agreement, even among experienced clinicians, in recognizing and quantifying early CT changes. Improved methods of recognizing and quantifying early ischemic brain damage are needed.
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Affiliation(s)
- J C Grotta
- Department of Neurology, University of Texas-Houston Medical School, Houston, Texas, USA.
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Abstract
The first type III module of fibronectin (Fn) contains a cryptic site that binds Fn and its N-terminal 29 kDa fragment and is thought to be important for fibril formation (Morla, A., Zhang, Z., and Ruoslahti, E. (1994) Nature 367, 193-196; Hocking, D. C., Sottile, J. , and McKeown-Longo, P. J. (1994) J. Biol. Chem. 269, 19183-19191). A synthetic 31-mer peptide (NAPQ ... TIPG) derived from the middle of domain III1 was also shown to bind Fn, but the site of its interaction was not determined (Morla, A., and Ruoslahti, E. (1992) J. Cell Biol. 118, 421-429). By affinity chromatography on peptide-agarose, we tested a set of fragments representing the entire light chain of plasma Fn. Only 40-kDa Hep-2 (III12-15) failed to bind. The concentration of urea required for peak elution of Fn and the other fragments decreased in the order Fn > 42-kDa GBF (I6II1-2I7-9) > 19-kDa Fib-2 (I10-12) > 110-kDa CBF(III2-10) > 29-kDa Fib-1 (I1-I5). Neither Fn nor any of the fragments bound immobilized intact III1, confirming the cryptic nature of this activity. In an effort to detect interactions between other Fn domains, all fragments were coupled to Sepharose, and each fragment was tested on each affinity matrix before and after denaturation. The only interaction detected was that of fluid phase III1 with immobilized denatured 110-kDa CBF and 40-kDa Hep-2, both of which contain type III domains. Analysis of subfragments revealed this activity to be dominated by domains III7 and III15. Fn itself did not bind to the denatured fragments. Thus, domain III1 contains two cryptic "self-association sites," one that is buried in the core of the fold but recognizes many Fn fragments when presented as a peptide and another that is concealed in Fn but exposed in the native isolated domain and recognizes cryptic sites in two other type III domains. These interactions between type III domains could play an important role in assembly of Fn multimers in the extracellular matrix.
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Affiliation(s)
- K C Ingham
- American Red Cross Holland Laboratory, Rockville, Maryland 20855, USA
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Corley MC, Huff S, Sayles L, Short L. Patient and nurse criteria for heart transplant candidacy. Medsurg Nurs 1995; 4:211-5. [PMID: 7780475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The criteria nurses and patients believe should be used to allocate hearts for transplantation were explored and compared in a descriptive study. Although the majority of both groups agreed that patients with AIDS or who are HIV positive should not receive a transplant, the two groups agreed very little on the other criteria. This research has implications for clinical care and ethical decision making.
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Huff S, Matsuka YV, McGavin MJ, Ingham KC. Interaction of N-terminal fragments of fibronectin with synthetic and recombinant D motifs from its binding protein on Staphylococcus aureus studied using fluorescence anisotropy. J Biol Chem 1994; 269:15563-70. [PMID: 8195201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
The N-terminal 29-kDa fragment of fibronectin (Fn29K) contains five type I "finger" modules. It binds to heparin, fibrin, and bacteria and is involved in fibronectin (Fn) matrix assembly. Binding to Staphylococcus aureus involves a cell wall-associated protein that contains approximately three repeats of a 38-residue D motif (Signäs, C., Raucci, G., Jönsson, K., Lindgren, P.-E., Anantharamaiah, G.M., Höök, M., and Lindberg, M. (1989) Proc. Natl. Acad. Sci. U.S.A. 86, 699-703). Synthetic peptides representing D1, D2, and D3, when labeled with fluorescein isothiocyanate (FITC), exhibited increases in fluorescence anisotropy upon addition of Fn29K but not other Fn fragments. The response could be reversed by titration with unlabeled peptides to yield inhibition constants that agreed with the dissociation constants obtained by fitting the initial response. Values of Kd ranged between 2 and 12 microM, with D3 having the highest affinity. Specificity of D3 for Fn29K was further illustrated by the fact that its C-terminal half (D3b, Lys801 to Lys821), when immobilized, selectively adsorbed Fn29K from a thermolysin digest of fibronectin. The binding site in Fn was further localized within Fn29K by analyzing smaller proteolytic or recombinant subfragments. Those containing fingers, F3-5 and F4-5, were purified on D3b-Sepharose and bound FITC-D3b with Kd values of 4-6 microM. Subfragments containing pairs of fingers 1-2, 2-3, or single fingers 1, 4, or 5 were inactive. Whole D1-3, expressed in Escherichia coli and labeled with fluorescein, bound 1.9 mol/mol of Fn29K with Kd = 1.5 nM. F4-5 and F2-3 bound with respective Kd values of 0.35 and 4.4 microM. These and other results indicate that binding of the individual D region peptides is mediated through their C-terminal halves, primarily to fingers 4 and 5 of fibronectin. The possible basis of the much higher affinity of D1-3 is discussed.
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Affiliation(s)
- S Huff
- Holland Laboratory, American Red Cross, Rockville, Maryland 20855
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Haug P, Koehler S, Lau LM, Wang P, Rocha R, Huff S. A natural language understanding system combining syntactic and semantic techniques. Proc Annu Symp Comput Appl Med Care 1994:247-51. [PMID: 7949928 PMCID: PMC2247803] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
A large proportion of the medical record currently available in computerized medical information systems is in the form of free text reports. While the accessibility of this source of data is improved through inclusion in the computerized record, it remains unavailable for automated decision support, medical research, and management of medical delivery systems. Natural language understanding systems (NLUS) designed to encode free text reports represent one approach to making this information available for these uses. Below we describe an experimental NLUS designed to parse the reports of chest radiographs and store the clinical data extracted in a medical data base.
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Affiliation(s)
- P Haug
- Department of Medical Informatics, LDS Hospital, Primary Children's Medical Center, Salt Lake City, Utah
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Abstract
A method of randomising specific regions of coding sequences has been devised which utilises the Lac phenotype to identify mutants. Intact genes can be mutagenised, making it unnecessary to reclone the mutations before examining mutant phenotypes. The method has been applied to three residues around the N-terminus of the first alpha helix of the Klebsiella pneumoniae nitrogenase flavodoxin, which are predicted to form part of the phosphate-binding subsite. Surprisingly, most substitutions at Gly12, a highly conserved residue in the chain reversal preceding the alpha helix, appeared to be fairly stable in vivo and were found to retain some function. Substitutions at Lys13, a surface residue which contributes to a patch of positive charge characteristic of the nitrogenase flavodoxins, had no major effect on stability or function. However, most substitutions at Thr14, which is predicted to hydrogen bond to the phosphate of the prosthetic group FMN, were much more destabilising and grossly reduced function. The exceptions were Ala, Cys, Ser and Val, which suggests that the bulk of the residue at this position is critical.
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Affiliation(s)
- M Drummond
- AFRC IPSR Nitrogen Fixation Laboratory, University of Sussex, Brighton, England
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Thorneley RN, Abell C, Ashby GA, Drummond MH, Eady RR, Huff S, Macdonald CJ, Shneier A. Posttranslational modification of Klebsiella pneumoniae flavodoxin by covalent attachment of coenzyme A, shown by 31P NMR and electrospray mass spectrometry, prevents electron transfer from the nifJ protein to nitrogenase. A possible new regulatory mechanism for biological nitrogen fixation. Biochemistry 1992; 31:1216-24. [PMID: 1734967 DOI: 10.1021/bi00119a035] [Citation(s) in RCA: 28] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
A strain of Escherichia coli (71-18) that produces ca. 15% of its soluble cytoplasmic protein as a flavodoxin, the Klebsiella pneumoniae nifF gene product, has been constructed. The flavodoxin was purified using FPLC and resolved into two forms, designated KpFldI and KpFldII, which were shown to have identical N-terminal amino acid sequences (30 residues) in agreement with that predicted by the K. pneumoniae nifF DNA sequence. 31P NMR, electrospray mass spectrometry, UV-visible spectra, and thiol group estimations showed that the single cysteine residue (position 68) of KpFldI is posttranslationally modified in KpFldII by the covalent, mixed disulfide, attachment of coenzyme A. KpFldII was inactive as an electron carrier between the K. pneumoniae nifJ product (a pyruvate-flavodoxin oxidoreductase) and K. pneumoniae nifH product (the Fe-protein of nitrogenase). This novel posttranslational modification of a flavodoxin is discussed in terms of the regulation of nitrogenase activity in vivo in response to the level of dissolved O2 and the carbon status of diazotrophic cultures.
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Affiliation(s)
- R N Thorneley
- AFRC Institute of Plant Science Research, University of Sussex, Brighton, U.K
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Fu LS, Huff S, Bouhaddou O, Bray B, Warner H. Estimating frequency of disease findings from combined hospital databases: a UMLS project. Proc Annu Symp Comput Appl Med Care 1991:373-7. [PMID: 1807625 PMCID: PMC2247557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Merging data from the Salt Lake VA hospital database and the LDS hospital HELP system into a UMLS sponsored unified patient database has demonstrated that distribution of variables within a disease is hospital independent. Although disease prevalence is clearly not the same among hospitals, analysis of data within a disease group across hospitals can be done using such a merged database. This unified patient database would allow study of unusual diseases not possible using data from a single institution.
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Affiliation(s)
- L S Fu
- Department of Medical Informatics, University of Utah, School of Medicine, Salt Lake City
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Wise M, Huff S. Home i.v. therapy. A hospital-based program. NITA 1985; 8:309-11. [PMID: 3852087] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Huff S. Getting what you want from disposables. Same Day Surg 1979; 3:146-7. [PMID: 10245265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Huff S. Disposables: know what you want. Hosp Infect Control 1979; 6:109-10. [PMID: 10243550] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
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Lindahl RL, Douglass CW, Huff S. A survey of the attitudes of dentists toward expanding auxiliaries' duties. Health Serv Rep 1973; 88:423-6. [PMID: 4707687 PMCID: PMC1616081] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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Lindahl RL, Huff S. North Carolina dentists comment on expanded duties. J N C Dent Soc 1972; 55:17-22. [PMID: 4501789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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