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Rossini F, Zauner H, Bergmann J, Kronbichler M, Spindler I, Golaszewski S, Trinka E, Staffen W. HMPAO-SPECT Can Discriminate between Patients with Subjective Cognitive Complaints with and without Cognitive Deficits and those with Mild Cognitive Impairment. Curr Alzheimer Res 2020; 16:843-851. [PMID: 31453786 DOI: 10.2174/1567205016666190827115138] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 02/05/2019] [Revised: 08/09/2019] [Accepted: 08/21/2019] [Indexed: 01/09/2023]
Abstract
BACKGROUND Growing evidence suggests that pathological processes leading to Alzheimer's disease occurs gradually and begins to develop decades before the earliest clinical symptoms occur. The use of biomarkers has been proposed to detect evidence of preclinical Alzheimer's pathologic change in asymptomatic subjects. Subjective cognitive complaints (SCC) i.e. self-reported cognitive decline with normal cognition have been reported as an indicator of future cognitive decline, however, this condition is unspecific. OBJECTIVE In the present study we used the regional brain perfusion measured by HMPAO-SPECT as Biomarker of neurodegeneration to compare the regional brain perfusion of patient with subjective cognitive complaints with and without minimal cognitive dysfunction (SCC+ and SCC- respectively) in respect to patients with mild cognitive impairment (MCI). METHODS We retrospectively examined 736 Patients who referred to our Memory Clinic because of suspected cognitive dysfunction. After exclusion of patients with overt dementia, automated, quantitatively assessed relative cerebral blood flow of 10 forebrain regions (thalamus, parietotemporal, medial temporal, posterior temporal, posterior cingulate gyrus, each region left hemispheric and right hemispheric) and neuropsychological assessment of 64 SCC (32 SCC+; 32 SCC-) and 28 MCI subjects were analysed. RESULTS .The most relevant differences between groups in cognitive performance concerned verbal memory. Left hemispheric medial temporal region could significantly discriminate between all three groups, with a progressive decrease n perfusion from SCC towards MCI. Area under the curve of left medial temporal region showed a sensitivity of 0,61 and a specificity of 0,78 for discriminating MCI from SCC. CONCLUSION Automated analysis of HMPAO-SPECT data of MCI and SCC+ patients showed significant perfusion differences in medial temporal region and impaired verbal memory, both of which are known features of Alzheimer's disease. Perfusion patterns and verbal memory performance in SCC+ are more similar to MCI than SCC-. Thus, SPECT analysis could distinguish those subjects whose perfusion pattern resembles that of an MCI from those who do not. In our opinion, this could identify two populations with a different risk of progression to AD, with SCC+ subjects needing further diagnostic examination and repeated follow-up.
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Affiliation(s)
- F Rossini
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria
| | - H Zauner
- Rehabilitation Center of the Pensionsversicherungsanstalt, Großgmain, Austria
| | - J Bergmann
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria.,Neuroscience Institute, Christian Doppler Medical Centre, Salzburg, Austria
| | - M Kronbichler
- Neuroscience Institute, Christian Doppler Medical Centre, Salzburg, Austria.,Centre for Cognitive Neuroscience, Salzburg, Austria
| | - I Spindler
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria
| | - S Golaszewski
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria.,Neuroscience Institute, Christian Doppler Medical Centre, Salzburg, Austria.,Centre for Cognitive Neuroscience, Salzburg, Austria
| | - E Trinka
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria.,Neuroscience Institute, Christian Doppler Medical Centre, Salzburg, Austria.,Centre for Cognitive Neuroscience, Salzburg, Austria
| | - W Staffen
- Department of Neurology, Christian Doppler Medical Centre, Paracelsus Medical University, Salzburg, Austria.,Centre for Cognitive Neuroscience, Salzburg, Austria
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Hösl M, Egger M, Bergmann J, Amberger T, Mueller F, Jahn K. Tempo-spatial gait adaptations in stroke patients when approaching and crossing an elevated surface. Gait Posture 2019; 73:279-285. [PMID: 31394371 DOI: 10.1016/j.gaitpost.2019.07.378] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 05/31/2019] [Accepted: 07/27/2019] [Indexed: 02/02/2023]
Abstract
BACKGROUND In ambulatory stroke survivors, outdoor walking is important for participation, so adapting to heightened levels (e.g. curbs) is essential. This needs precise step regulation and foot positioning and has to be achieved despite impaired balance and motor regulation. RESEARCH QUESTION How do stroke patients approach and cross elevated surfaces? METHODS Gait of 12 hemiparetic stroke patients (62.8 ± 10.3 years; Functional Ambulatory Category 3-5) and 13 controls (60.0 ± 12.4 years) was compared using a sensor carpet and 3D motion capturing to collect tempo-spatial parameters and foot trajectories in two conditions: flat walking vs. approaching to and stepping onto an elevated surface (height 15 cm) in a self-selected manner (6 trials each). Tempo-spatial adaptations were normalized to flat walking while trajectory analysis focused on foot clearance and placement. Complementary assessments included the Dynamic-Gait-Index, the Berg-Balance-Test and the Falls Efficacy Scale. RESULTS Patients showed significantly worse Dynamic-Gait-Indices, less balance and more fear of falling. During the approach phase, patients slowed down, partly accompanied by shorter steps which controls did not. During crossing, no preference for a specific leading leg was detected. Clearance of the leading leg on average was not reduced but patients landed closer to the edge. Still clearance of the paretic leg was less than that of the non-paretic leg and the minimal clearance across all trials suggested an increased tripping risk, most evident for the trailing leg. In particular slower approaching caused difficulties to ensure sufficient leg clearance and to place the foot safely. Independent from that, better balance correlated with safer clearance. SIGNIFICANCE When managing elevated levels, leading with the paretic leg causes more difficulties to safely clear the legs which is considerably dependent upon speed. Therapists should consider that slow walking may not increase safety while faster gait and aspects of postural control potentially facilitate crossing a curb.
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Affiliation(s)
- M Hösl
- Schoen Clinic Vogtareuth, Gait and Motion Analysis Laboratory, Krankenhausstr. 20, 83569 Vogtareuth, Germany; Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany.
| | - M Egger
- Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany
| | - J Bergmann
- Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany; German Center for Vertigo and Balance Disorders, Ludwig-Maximilians-University of Munich, Marchioninistr. 15, 81377 Munich, Germany
| | - T Amberger
- Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany
| | - F Mueller
- Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany
| | - K Jahn
- Schoen Clinic Bad Aibling, Department of Neurology, Kolbermoorerstr. 72, 83043 Bad Aibling, Germany; German Center for Vertigo and Balance Disorders, Ludwig-Maximilians-University of Munich, Marchioninistr. 15, 81377 Munich, Germany
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Arlaud C, Strazzulla A, Lekens B, Gavazzi G, Paccalin M, Roubeaud C, Belfeki N, Abbroug S, Bergmann J, Diamantis S. Évaluation du suivi des recommandations de prise en charge des pneumopathies aiguës communautaires selon l’âge en médecine de ville en France. Med Mal Infect 2019. [DOI: 10.1016/j.medmal.2019.04.135] [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: 10/26/2022]
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Affiliation(s)
- M Roes
- Sociology / Nursing Science, Witten, Nordrhein-Westfalen, Germany
| | - T Stacke
- Public Health, DZNE German Center for Neurodegenerative Diseases, University of Witten/Herdecke, Witten, Germany
| | - J Bergmann
- DZNE German Center for Neurodegenerative Diseases, University of Witten/Herdecke, Witten, Germany
| | - D Purwin
- DZNE German Center for Neurodegenerative Diseases, University of Witten/Herdecke, Witten, Germany
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Leistenschneider E, Reiter MP, Ayet San Andrés S, Kootte B, Holt JD, Navrátil P, Babcock C, Barbieri C, Barquest BR, Bergmann J, Bollig J, Brunner T, Dunling E, Finlay A, Geissel H, Graham L, Greiner F, Hergert H, Hornung C, Jesch C, Klawitter R, Lan Y, Lascar D, Leach KG, Lippert W, McKay JE, Paul SF, Schwenk A, Short D, Simonis J, Somà V, Steinbrügge R, Stroberg SR, Thompson R, Wieser ME, Will C, Yavor M, Andreoiu C, Dickel T, Dillmann I, Gwinner G, Plaß WR, Scheidenberger C, Kwiatkowski AA, Dilling J. Dawning of the N=32 Shell Closure Seen through Precision Mass Measurements of Neutron-Rich Titanium Isotopes. Phys Rev Lett 2018; 120:062503. [PMID: 29481255 DOI: 10.1103/physrevlett.120.062503] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Revised: 12/11/2017] [Indexed: 06/08/2023]
Abstract
A precision mass investigation of the neutron-rich titanium isotopes ^{51-55}Ti was performed at TRIUMF's Ion Trap for Atomic and Nuclear science (TITAN). The range of the measurements covers the N=32 shell closure, and the overall uncertainties of the ^{52-55}Ti mass values were significantly reduced. Our results conclusively establish the existence of the weak shell effect at N=32, narrowing down the abrupt onset of this shell closure. Our data were compared with state-of-the-art ab initio shell model calculations which, despite very successfully describing where the N=32 shell gap is strong, overpredict its strength and extent in titanium and heavier isotones. These measurements also represent the first scientific results of TITAN using the newly commissioned multiple-reflection time-of-flight mass spectrometer, substantiated by independent measurements from TITAN's Penning trap mass spectrometer.
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Affiliation(s)
- E Leistenschneider
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - M P Reiter
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - S Ayet San Andrés
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - B Kootte
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - J D Holt
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - P Navrátil
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - C Babcock
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - C Barbieri
- Department of Physics, University of Surrey, Guildford GU2 7XH, United Kingdom
| | - B R Barquest
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - J Bergmann
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - J Bollig
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Ruprecht-Karls-Universität Heidelberg, D-69117 Heidelberg, Germany
| | - T Brunner
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Physics Department, McGill University, H3A 2T8 Montréal, Québec, Canada
| | - E Dunling
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics, University of York, York YO10 5DD, United Kingdom
| | - A Finlay
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - H Geissel
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - L Graham
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - F Greiner
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - H Hergert
- National Superconducting Cyclotron Laboratory, Michigan State University, East Lansing, Michigan 48824,USA
| | - C Hornung
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - C Jesch
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - R Klawitter
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Max-Planck-Institut für Kernphysik, Heidelberg D-69117, Germany
| | - Y Lan
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
| | - D Lascar
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - K G Leach
- Department of Physics, Colorado School of Mines, Golden, Colorado 80401, USA
| | - W Lippert
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - J E McKay
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - S F Paul
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Ruprecht-Karls-Universität Heidelberg, D-69117 Heidelberg, Germany
| | - A Schwenk
- Max-Planck-Institut für Kernphysik, Heidelberg D-69117, Germany
- Institut für Kerphysik, Technische Universität Darmstadt, 64289 Darmstadt, Germany
- ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany
| | - D Short
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - J Simonis
- Institut für Kernphysik and PRISMA Cluster of Excellence, Johannes Gutenberg-Universität, 55099 Mainz, Germany
| | - V Somà
- IRFU, CEA, Université Paris-Saclay, 91191 Gif-sur-Yvette, France
| | - R Steinbrügge
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
| | - S R Stroberg
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Reed College, Portland, Oregon 97202, USA
| | - R Thompson
- Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - M E Wieser
- Department of Physics and Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
| | - C Will
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
| | - M Yavor
- Institute for Analytical Instrumentation, Russian Academy of Sciences, 190103 St. Petersburg, Russia
| | - C Andreoiu
- Department of Chemistry, Simon Fraser University, Burnaby, British Columbia V5A 1S6, Canada
| | - T Dickel
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - I Dillmann
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - G Gwinner
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada
| | - W R Plaß
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - C Scheidenberger
- II. Physikalisches Institut, Justus-Liebig-Universität, 35392 Gießen, Germany
- GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
| | - A A Kwiatkowski
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of Victoria, Victoria, British Columbia V8P 5C2, Canada
| | - J Dilling
- TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia V6T 2A3, Canada
- Department of Physics and Astronomy, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada
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Bergmann J, Reyes-Garcia L, Ballesteros C, Cuevas Y, Flores MF, Curkovic T. Identification of the Female Sex Pheromone of the Leafroller Proeulia triquetra Obraztsov (Lepidoptera: Tortricidae). Neotrop Entomol 2016; 45:351-356. [PMID: 26868654 DOI: 10.1007/s13744-016-0372-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2015] [Accepted: 01/19/2016] [Indexed: 06/05/2023]
Abstract
Proeulia triquetra Obraztsov (Lepidoptera: Tortricidae) is an occasional pest in fruit orchards in central-southern Chile. In order to develop species-specific lures for detection and monitoring of this species, we identified the female-produced sex pheromone. (Z)-11-Tetradecenyl acetate (Z11-14:OAc), (E)-9-dodecenyl acetate (E9-12:OAc), and (E)-11-Tetradecenyl acetate (E11-14:OAc) were identified as biologically active compounds present in female pheromone glands by solvent extraction of the gland and analysis of the extracts by gas chromatography-electroantennographic detection and gas chromatography-mass spectrometry. In field tests, lures baited with synthetic Z11-14:OAc and E9-12:OAc in a 10:1 ratio were highly attractive to males of the species.
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Affiliation(s)
- J Bergmann
- Instituto de Química, Pontificia Univ Católica de Valparaíso, Valparaíso, Chile.
| | - L Reyes-Garcia
- Instituto de Química, Pontificia Univ Católica de Valparaíso, Valparaíso, Chile
- Depto de Ciencias Básicas, Univ Santo Tomás, Viña del Mar, Chile
| | - C Ballesteros
- Depto de Sanidad Vegetal, Fac de Ciencias Agronómicas, Univ de Chile, Santiago, Chile
| | - Y Cuevas
- Depto de Sanidad Vegetal, Fac de Ciencias Agronómicas, Univ de Chile, Santiago, Chile
| | - M F Flores
- Instituto de Química, Pontificia Univ Católica de Valparaíso, Valparaíso, Chile
| | - T Curkovic
- Depto de Sanidad Vegetal, Fac de Ciencias Agronómicas, Univ de Chile, Santiago, Chile
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Kobalz K, Kobalz M, Möllmer J, Junghans U, Lange M, Bergmann J, Dietrich S, Wecks M, Gläser R, Krautscheid H. Bis(carboxyphenyl)-1,2,4-triazole Based Metal–Organic Frameworks: Impact of Metal Ion Substitution on Adsorption Performance. Inorg Chem 2016; 55:6938-48. [DOI: 10.1021/acs.inorgchem.6b00530] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- K. Kobalz
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - M. Kobalz
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - J. Möllmer
- Institut für Nichtklassische Chemie e.V., Permoserstrasse
15, D-04318 Leipzig, Germany
| | - U. Junghans
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - M. Lange
- Institut für Nichtklassische Chemie e.V., Permoserstrasse
15, D-04318 Leipzig, Germany
| | - J. Bergmann
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - S. Dietrich
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
| | - M. Wecks
- Institut für Nichtklassische Chemie e.V., Permoserstrasse
15, D-04318 Leipzig, Germany
| | - R. Gläser
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
- Institut für Nichtklassische Chemie e.V., Permoserstrasse
15, D-04318 Leipzig, Germany
| | - H. Krautscheid
- Fakultät
für Chemie und Mineralogie, Universität Leipzig, Johannisallee
29, D-04103 Leipzig, Germany
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Dreiseidler T, Bergmann J, Zirk M, Rothamel D, Zöller JE, Kreppel M. Three-dimensional fracture pattern analysis of the Obwegeser and Dal Pont bilateral sagittal split osteotomy. Int J Oral Maxillofac Surg 2016; 45:1452-1458. [PMID: 27364368 DOI: 10.1016/j.ijom.2016.06.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 12/19/2015] [Revised: 03/16/2016] [Accepted: 06/02/2016] [Indexed: 11/17/2022]
Abstract
The Obwegeser and Dal Pont modification of the bilateral sagittal split osteotomy (BSSO) is a well-established procedure in orthognathic surgery. The purpose of this retrospective study was to analyze the actual fracture patterns achieved with BSSO by Obwegeser and Dal Pont modification using postoperative cone beam computed tomography (CBCT) datasets from 100 patients. A total of 200 split osteotomies were assessed, which could be categorized into nine different split patterns. Only one of the observed split fractures (0.5%) followed exactly the fracture line described by Obwegeser and Dal Pont, whereas 40% followed the fracture line according to the Hunsuck and Epker modification and 13.5% were seen as unfavourable splits mainly running over the buccal plate. A significant correlation was found between unfavourable buccal splits and both horizontal osteotomies reaching the buccal surface at the dorsal ramus (P=0.001) and a vertical caudal bone cut end at the corpus with a buccal position (P<0.001). These results show that a complete antero-posterior horizontal osteotomy at the mandibular ramus does not lead to the intended fracture pattern, which rebuts the argument of a greater amount of bony overlap using the Obwegeser and Dal Pont modification.
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Affiliation(s)
- T Dreiseidler
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany.
| | - J Bergmann
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany
| | - M Zirk
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany
| | - D Rothamel
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany
| | - J E Zöller
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany
| | - M Kreppel
- Department of Craniomaxillofacial and Plastic Surgery, University of Cologne, Cologne, Germany
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Kremeike K, Mohr A, Kampschulte R, Bergmann J, Beil S, Neuhaus U, Dierks ML, Driftmann C, Duhr A, Groeneveld S, Kaspar M, Kowollik G, Miest HH, Schene I, Reinhardt D. [Network for Oncological Advisory Service (NOF) - a Pilot Project for (Long-Term) Follow-Up Care of Pediatric Cancer Patients]. Klin Padiatr 2016; 228:325-331. [PMID: 27171924 DOI: 10.1055/s-0042-105651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Background: In Germany some 2 000 children and adolescent are diagnosed with cancer every year. Curing rates are increasing and therewith also the number of survivors is growing. Survivors frequently suffer from long-term effects of the disease and its treatment, but long-term follow-up care shows deficits. Method: The Network for oncological advisory service (NOF) started in 11/2013, researching and building up a network of available support in Lower Saxony. A telephone hotline was installed in 01/2014 in order to advice survivors on their problems. At the same time, an interview study on survivors needs was conducted throughout Germany. Results: In the first 2 years, the NOF gave advice to 79 patients. Whilst enquiries of medical or psychological nature were transferred to the cooperation partner, requests on psychosocial and social legal issues are being deled by the NOF due to lack of appropriate partners. The evaluation of 25 interviews shows key issues in long-term after-care: (1) transition from acute therapy to everyday life, (2) problems due to pediatric cancer and therapy, (3) patients perception of own disposition, (4) social reactions towards survivors, (5) structure of long-term follow-up care, (6) information flow. Conclusion: Many survivors suffer from long-term effects of cancer and treatment. The lack of available contact person and being in limbo between cured and simultaneously affected by the cancer treatment and chronic diseases is perceived as being problematic. This translates to various requirements on a patient-oriented long-term care, mainly in the psychosocial field.
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Affiliation(s)
- K Kremeike
- Netzwerk für die Versorgung schwerkranker Kinder und Jugendlicher e.V., Hannover Medical School, Hannover
| | - A Mohr
- Netzwerk für die Versorgung schwerkranker Kinder und Jugendlicher e.V., Hannover Medical School, Hannover
| | - R Kampschulte
- Netzwerk für die Versorgung schwerkranker Kinder und Jugendlicher e.V., Hannover Medical School, Hannover
| | | | - S Beil
- Netzwerk für die Versorgung schwerkranker Kinder und Jugendlicher e.V., Hannover Medical School, Hannover
| | - U Neuhaus
- Netzwerk für die Versorgung schwerkranker Kinder und Jugendlicher e.V., Hannover Medical School, Hannover
| | - M-L Dierks
- Institute of Epidemiology Social Medicine and Health System Research, Hannover Medical School, Hannover
| | - C Driftmann
- Mühlenkreis Clinics, Initiative Eltern krebskranker Kinder Minden e.V., Minden
| | - A Duhr
- Paediatric Hematology and Oncology, Bremen Central Hospital, Bremen
| | - S Groeneveld
- Clinic of Paediatric and Youth Medicine and Psychosomatics, City Hospital Wolfsburg, Wolfsburg
| | - M Kaspar
- Department of Paediatric Haematology and Oncology, Hospital Oldenburg, Oldenburg
| | - G Kowollik
- Department of Paediatric Haematology and Oncology, Hannover Medical School, Hannover
| | - H-H Miest
- Parents` house Göttingen, Elterninitiative für das krebskranke Kind Göttingen e.V., Göttingen
| | - I Schene
- Department of Paediatric Haematology and Oncology, Municipal Clinic of Braunschweig, Braunschweig
| | - D Reinhardt
- Clinic for Pediatrics III, University Hospital Essen, Essen, Germany
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Wirth J, Garwe F, Bergmann J, Paa W, Csaki A, Stranik O, Fritzsche W. Tuning of spectral and angular distribution of scattering from single gold nanoparticles by subwavelength interference layers. Nano Lett 2014; 14:570-577. [PMID: 24417568 DOI: 10.1021/nl4037438] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Localized surface plasmon resonance (LSPR) as the resonant oscillation of conduction electrons in metal nanostructures upon light irradiation is widely used for sensing as well as nanoscale manipulation. The spectral resonance band position can be controlled mainly by nanoparticle composition, size, and geometry and is slightly influenced by the local refractive index of the near-field environment. Here we introduce another approach for tuning, based on interference modulation of the light scattered by the nanostructure. Thereby, the incoming electric field is wavelength-dependent modulated in strength and direction by interference due to a subwavelength spacer layer between nanoparticle and a gold film. Hence, the wavelength of the scattering maximum is tuned with respect to the original nanoparticle LSPR. The scattering wavelength can be adjusted by a metallic mirror layer located 100-200 nm away from the nanoparticle, in contrast to near-field gap mode techniques that work at distances up to 50 nm in the nanoparticle environment. Thereby we demonstrate, for the first time at the single nanoparticle level, that dependent on the interference spacer layer thickness, different distributions of the scattered signal can be observed, such as bell-shaped or doughnut-shaped point spread functions (PSF). The tuning effect by interference is furthermore applied to anisotropic particles (dimers), which exhibit more than one resonance peak, and to particles which are moved from air into the polymeric spacer layer to study the influence of the distance to the gold film in combination with a change of the surrounding refractive index.
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Affiliation(s)
- J Wirth
- Leibniz Institute of Photonic Technology (IPHT) , 07745 Jena, Germany
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Bergmann J, Genc E, Kohler A, Singer W, Pearson J. Anatomy of early visual cortex predicts visual working memory capacity. J Vis 2013. [DOI: 10.1167/13.9.1349] [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: 11/24/2022] Open
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14
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Bergmann J, Krewer C, Müller F, Koenig A, Riener R. Virtual Reality to control active participation in a subacute stroke patient during robot-assisted gait training. IEEE Int Conf Rehabil Robot 2011; 2011:5975407. [PMID: 22275610 DOI: 10.1109/icorr.2011.5975407] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [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: 05/31/2023]
Abstract
Virtual Reality (VR) provides a promising medium to enrich robot assisted rehabilitation. VR applications present the opportunity to engage patients in therapy and control participation. The aim of this study was to investigate two strategies to control active participation of a stroke patient focusing on the involvement of the paretic leg in task solution. A subacute stroke patient with a severe hemiparesis performed two experiments on the driven gait orthosis Lokomat. Patient activity was quantified by weighted interaction torques measured in both legs (experiment A) and the paretic leg only (experiment B). The patient was able to successfully implement both the bilateral and unilateral control modality. Both control modes increased the motor output of the paretic leg, however the paretic leg control mode resulted in a much more differentiated regulation of the activity in the leg. Both control modes are appropriate approaches to enhance active participation and increase motor output in the paretic leg. Further research should evaluate the therapeutic benefit of patients with hemiparesis using the unilateral control mode depending on the severity of their impairment.
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Affiliation(s)
- J Bergmann
- Schön Klinik Bad Aibling, Bad Aibling, Germany.
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Abstract
The Rietveld method is based on a weighted least-squares fit of a model diffraction pattern to the step-scan data of a complete experimental X-ray or neutron diffraction pattern. It is shown here that the weight most commonly used in Rietveld refinement of powder diffraction data leads to a biased background estimate. To overcome this bias, an alternative method for refinement of Poisson-distributed experimental data is suggested that only involves changes of the input data and the weights of least-squares refinement. Model calculations demonstrate that this novel method allows an improved refinement of the parameters describing the background and the Bragg reflections. The proposed method can be readily implemented in existing Rietveld programs.
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Burkert A, Bergmann J, Triebel W, Natura U. Pulse stretcher with variable pulse length for excimer laser applications. Rev Sci Instrum 2010; 81:033104. [PMID: 20370158 DOI: 10.1063/1.3340879] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Excimer laser systems are often combined with pulse stretchers, e.g., in lithography and Raman spectroscopy to reduce pulse peak intensities. We developed a pulse stretcher which is suited especially for pulse length dependent applications, e.g., in material research. This pulse stretcher is based on imaging and provides identical beam profiles and divergences at different pulse lengths in combination with the possibility of switching between four pulse lengths. Therefore, beam splitters are mounted onto motorized translation stages. These features are important for the characterization and development of improved optical materials for deep-ultraviolet applications. Here, two 193 nm single tube excimer lasers (Lambda Physik: LPX 240i, Cymer: ELS 5600) were evaluated concerning their combinability with an attached pulse stretcher. The wave-front radii of the ELS 5600 are dependent on repetition rate or pulse energy and are changing during warming-up. Without adapted pulse shaping, this can cause destruction of stretcher optics due to moving foci. We found that the LPX 240i could be combined easily with a pulse stretcher using beam shaping with only one cylindrical lens. We could demonstrate that stretched 193 nm laser pulses retard aging of CaF(2) crystals.
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Affiliation(s)
- A Burkert
- Institute of Photonic Technology, 07745 Jena, Germany.
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Jungmann V, Werner R, Bergmann J, Daum J, Wöhrle JC, Dünnebacke J, Silomon M. [Postpartum cerebral venous sinus thrombosis after epidural anaesthesia]. Anaesthesist 2009; 58:268-72. [PMID: 19107452 DOI: 10.1007/s00101-008-1490-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
Cerebral venous sinus thrombosis during pregnancy or puerperium is not a rarity. Nevertheless, it is often misdiagnosed. With the increasing use of regional anaesthesia in obstetrics the differential diagnosis of postdural puncture headache is often difficult. The case of a patient is reported who suffered from both intracranial hypotension and cerebral venous sinus thrombosis in the postpartum period.
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Affiliation(s)
- V Jungmann
- Klinik für Anästhesiologie und Intensivmedizin, Katholisches Klinikum Marienhof/St. Josef gGmbH, Koblenz
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Staffen W, Bergmann J, Schönauer U, Zauner H, Kronbichler M, Golaszewski S, Ladurner G. Cerebral perfusion (HMPAO-SPECT) in patients with depression with cognitive impairment versus those with mild cognitive impairment and dementia of Alzheimer's type: a semiquantitative and automated evaluation. Eur J Nucl Med Mol Imaging 2009; 36:801-10. [PMID: 19137294 DOI: 10.1007/s00259-008-1028-2] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2008] [Accepted: 11/21/2008] [Indexed: 02/07/2023]
Abstract
PURPOSE Comparative evaluation of regional brain perfusion measured by HMPAO-SPECT of patients with mild cognitive impairment (MCI), dementia of Alzheimer's type (DAT) and depression with cognitive impairment (DCI). METHODS A total of 736 patients were investigated because of suspected cognitive dysfunction. After exclusion of patients with other forms of dementia than DAT or relevant accompanying disorders, SPECT data from 149 MCI, 131 DAT and 127 DCI patients, and 123 controls without any cognitive impairment, were analysed. Relative cerebral blood flow of 34 anatomical regions was assessed with automated analysis software (BRASS). RESULTS Calculation of global forebrain perfusion discriminated demented from nondemented patients. Compared to controls DCI patients showed hypoperfusion of the thalamus, lentiform nucleus and medial temporal cortex. MCI patients differed significantly from controls concerning perfusion in both hemispheric temporal and parietal areas, and in the (right hemispheric) posterior part of the cingulate gyrus. MCI and DCI patients differed in the parietal, temporal superior and right hemispheric cingulate gyrus posterior cortices. Global forebrain and regional perfusion was more extensively reduced in DAT patients and discriminated them from controls, and MCI and DCI patients. Frontal perfusion disturbance was only present in DAT patients. CONCLUSION Automated analysis of HMPAO-SPECT data from MCI patients showed significant perfusion deficits in regions also involved in DAT patients, but ROC analysis demonstrated only moderate sensitivity and specificity for differentiating DAT patients from controls and DCI patients. Frontal hypoperfusion seems to correspond with conversion from MCI to DAT. Finally, the results in DCI patients again raise the question of depression as an early symptom of neurodegeneration.
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Affiliation(s)
- W Staffen
- Christian-Doppler-Clinic, Department of Neurology, Paracelsus Medical University, Salzburg, Austria.
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Garwe F, Bauerschäfer U, Csaki A, Steinbrück A, Ritter K, Bochmann A, Bergmann J, Weise A, Akimov D, Maubach G, König K, Hüttmann G, Paa W, Popp J, Fritzsche W. Optically controlled thermal management on the nanometer length scale. Nanotechnology 2008; 19:055207. [PMID: 21817605 DOI: 10.1088/0957-4484/19/05/055207] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The manipulation of polymers and biological molecules or the control of chemical reactions on a nanometer scale by means of laser pulses shows great promise for applications in modern nanotechnology, biotechnology, molecular medicine or chemistry. A controllable, parallel, highly efficient and very local heat conversion of the incident laser light into metal nanoparticles without ablation or fragmentation provides the means for a tool like a 'nanoreactor', a 'nanowelder', a 'nanocrystallizer' or a 'nanodesorber'. In this paper we explain theoretically and show experimentally the interaction of laser radiation with gold nanoparticles on a polymethylmethacrylate (PMMA) layer (one-photon excitation) by means of different laser pulse lengths, wavelengths and pulse repetition rates. To the best of our knowledge this is the first report showing the possibility of highly local (in a 40 nm range) regulated heat insertion into the nanoparticle and its surroundings without ablation of the gold nanoparticles. In an earlier paper we showed that near-infrared femtosecond irradiation can cut labeled DNA sequences in metaphase chromosomes below the diffraction-limited spot size. Now, we use gold as well as silver-enhanced gold nanoparticles on DNA (also within chromosomes) as energy coupling objects for femtosecond laser irradiation with single-and two-photon excitation. We show the results of highly localized destruction effects on DNA that occur only nearby the nanoparticles.
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Affiliation(s)
- F Garwe
- Institute of Photonic Technology (IPHT) Jena, PO Box 100239, D-07745 Jena, Germany
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Bergmann J. Health and Clinical Management - Impact on Clinical Outcome. Yearb Med Inform 2007. [DOI: 10.1055/s-0038-1638517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
SummaryTo summarize current excellent research in the field of health and clinical management.Synopsis of the articles selected for the IMIA Yearbook 2007.Five articles from international peer reviewed journals were selected for the section on health and clinical management of the IMIA Yearbook 2007. They represent outstanding research on computerized provider order entry, computer applications in the field of translational medicine, time efficiency of electronic health records, and deliverance of telemedicine.In the field of health and clinical management, clinical outcome of computer-supported healthcare, cost-benefit analysis, and barriers and facilitators for technology adoption are still current research topics.
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Mahé I, Boulanger C, Sollier CBD, Simoneau G, Bergmann J, Tedgui A, Drouet L. HCAN CHANGES IN HEMOSTATIC PARAMETERS EXPLAIN THE INCREASED INCIDENCE OF DVT IN ELDERLY ? J Thromb Haemost 2007. [DOI: 10.1111/j.1538-7836.2007.tb02270.x] [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: 11/30/2022]
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Bergmann J. Health and clinical management--impact on clinical outcome. Findings from the section on health and clinical management. Yearb Med Inform 2007:30-3. [PMID: 17700901] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023] Open
Abstract
OBJECTIVES To summarize current excellent research in the field of health and clinical management. METHOD Synopsis of the articles selected for the IMIA Yearbook 2007. RESULTS Five articles from international peer reviewed journals were selected for the section on health and clinical management of the IMIA Yearbook 2007. They represent outstanding research on computerized provider order entry, computer applications in the field of translational medicine, time efficiency of electronic health records, and deliverance of telemedicine. CONCLUSIONS In the field of health and clinical management, clinical outcome of computer-supported healthcare, cost-benefit analysis, and barriers and facilitators for technology adoption are still current research topics.
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Affiliation(s)
- J Bergmann
- Technical University of Braunschweig, Institute of Medical Informatics, Braunschweig, Germany.
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Bergmann J. Section 1: Health and Clinical Mangement: Health and Clinical Management – Comparing the Clinical Outcome of Computerized Strategies. Yearb Med Inform 2006. [DOI: 10.1055/s-0038-1638473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Abstract
SummaryTo summarize current excellent research in the field of health and clinical management.Synopsis of the articles selected for the IMIA Yearbook 2006.Current research in the field of health and clinical management analyses impact and patient outcome of both established and recently presented approaches. Usability and effects of extracting data from computerized medical records for preventive care and surveillance issues are a topic as well as strategies for detecting adverse events.The best paper selection in the field of health and clinical management shows examples of excellent research on assessment, strategies and concepts for computerized health information management approaches. The articles emphasize the necessity of carefully considering health information systems regarding their outcome and compatibility with clinical routine. A concerted management of knowledge about evaluated health information management approaches will advance this trend and should lead to a more evidence-based design of the underlying systems.
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Anthoni C, Laukoetter MG, Rijcken E, Vowinkel T, Mennigen R, Müller S, Senninger N, Russell J, Jauch J, Bergmann J, Granger DN, Krieglstein CF. Mechanisms underlying the anti-inflammatory actions of boswellic acid derivatives in experimental colitis. Am J Physiol Gastrointest Liver Physiol 2006; 290:G1131-7. [PMID: 16423918 DOI: 10.1152/ajpgi.00562.2005] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Recent clinical trials of the gum resin of Boswellia serrata have shown promising results in patients with ulcerative colitis. The objective of this study was to determine whether a semisynthetic form of acetyl-11-keto-beta-boswellic acid (sAKBA), the most potent anti-inflammatory component of the resin, also confers protection in experimental murine colitis induced by dextran sodium sulfate (DSS) to compare its effects with those standard medications of ulcerative colitis like steroids and to examine whether leukocyte-endothelial cell adhesion is a major target of action of sAKBA. Clinical measurements of disease activity and histology were used to assess disease progression, and intravital microscopy was employed to monitor the adhesion of leukocytes and platelets in postcapillary venules of the inflamed colon. sAKBA treatment significantly blunted disease activity as assessed both grossly and by histology. Similarly, the recruitment of adherent leukocytes and platelets into inflamed colonic venules was profoundly reduced in mice treated with sAKBA. Because previous studies in the DSS model have shown that P-selectin mediates these blood cell-endothelial cell interactions, the expression of P-selectin in the colonic microcirculation was monitored using the dual-radiolabeled antibody technique. The treatment of established colitis with sAKBA largely prevented the P-selectin upregulation normally associated with DSS colitis. All of the protective responses observed with sAKBA were comparable to that realized in mice treated with a corticosteroid. Our findings demonstrated an anti-inflammatory effect of sAKBA and indicated that P-selectin-mediated recruitment of inflammatory cells is a major site of action for this novel anti-inflammatory agent.
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Affiliation(s)
- C Anthoni
- Department of Molecular and Cellular Physiology, Louisiana State University Health Sciences Center, Shreveport, 71130, USA
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Bergmann J. Health and clinical management - comparing the clinical outcome of computerized strategies. Findings from the Section on Health and Clinical Management. Yearb Med Inform 2006:26-8. [PMID: 17051291] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023] Open
Abstract
OBJECTIVES To summarize current excellent research in the field of health and clinical management. METHODS Synopsis of the articles selected for the IMIA Yearbook 2006. RESULTS Current research in the field of health and clinical management analyses impact and patient outcome of both established and recently presented approaches. Usability and effects of extracting data from computerized medical records for preventive care and surveillance issues are a topic as well as strategies for detecting adverse events. CONCLUSIONS The best paper selection in the field of health and clinical management shows examples of excellent research on assessment, strategies and concepts for computerized health information management approaches. The articles emphasize the necessity of carefully considering health information systems regarding their outcome and compatibility with clinical routine. A concerted management of knowledge about evaluated health information management approaches will advance this trend and should lead to a more evidence-based design of the underlying systems.
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Affiliation(s)
- J Bergmann
- Technical University of Braunschweig, Institute of Medical Informatics, Braunschweig, Germany.
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Delcey V, Bercot B, Kandel T, Viguier M, Sellier P, Raskine L, Fihmann V, Bergmann J. P252 - Abcès cutanés et pneumonie nécrosante bilatérale : rôle de la leucocidine de panton-valentine. Ann Dermatol Venereol 2005. [DOI: 10.1016/s0151-9638(05)79981-6] [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: 11/28/2022]
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Bibl D, Lampl C, Biberhofer I, Kerschner K, Kypta A, Bergmann J, Kaindlstorfer A, Röper C, Yazdi K, Engleder C, Hofmann R, Deibl M, Leisch F, Ransmayr G. Internal carotid artery stent placement without emboli protection: Results and long-term outcome. Neurology 2005; 65:132-4. [PMID: 16009900 DOI: 10.1212/01.wnl.0000167604.56223.70] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [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: 11/15/2022] Open
Abstract
Patients with symptomatic > or = 60% (n = 134), asymptomatic > or = 80% (n = 143), and asymptomatic progressive > or = 60% (n = 25) internal carotid artery stenosis underwent stenting and were followed clinically and by Doppler-assisted duplex imaging for 27.1 +/- 15.6 months. Stroke and death from stroke occurred within 30 days after stenting in 4.7% of the symptomatic and in 3.0% of the asymptomatic patients and in the follow-up period in 2.3% of the symptomatic and in 1.2% of the asymptomatic patients.
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Affiliation(s)
- D Bibl
- Division of Neurology and Psychiatry, Linz General Hospital, Krankenhausstrasse 9, A-4020 Linz, Austria
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Bott OJ, Bergmann J, Hoffmann I, Vering T, Gomez EJ, Hernando ME, Pretschner DP. Analysis and Specification of Telemedical Systems Using Modelling and Simulation: the MOSAIK-M Approach. Stud Health Technol Inform 2005; 116:503-8. [PMID: 16160307] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
BACKGROUND AND MOTIVATION INCA (Intelligent Control Assistant for Diabetes) is a project funded by the EU with the objective to improve diabetes therapy by creating a personal control loop interacting with telemedical remote control. Development of telemedical systems generally is a complex task especially in international projects where engineering and user groups with different social and cultural background have to be included into the system development process. OBJECTIVES To explore if and how sophisticated information system modelling and simulation techniques can improve the development of telemedical systems. METHODS For system analysis and design the MOSAIK-M approach was chosen. MOSAIK-M means "Modelling, simulation, and animation of information and communication systems in medicine". It includes a generic process scheme, a meta model and a tool environment. The generic process scheme guides modelling projects to produce models of high quality in terms of correctness, completeness and validity. The meta model defines the modelling language.In INCA MOSAIK-M is used for analysis of the problem domain, specification of the telemedical system and cost/benefit-analysis. RESULTS The MOSAIK-M approach was used to create two models: an "As Is"-model of the problem domain and a "To Be"-model of the INCA system. The "As Is"-model of conventional insulin pump based diabetes care comprises submodels of diabetes management, ambulatory and clinical care. The "To Be"-model describes a patient's diabetes management using a smart phone that controls an insulin pump based on continuously measured interstitial glucose. It also describes telemedical care of a patient by diabetologists and a call centre. Both models can be simulated enhanced by visualisation capabilities to explore specific cases or scenarios. This feature proved valuable for the evaluation of both models through domain experts. The "To Be" model is used to guide the implementation of the system. Both models are being augmented by cost structures to support cost/benefit-analysis. CONCLUSIONS Even a complex telemedical system like the INCA system can be successfully specified using sophisticated modelling and simulation based approaches like MOSAIK-M. The resulting specification is a result of its own and ensures a lasting effect of the definitions and specifications produced during the project. International cooperation and evaluation of the system design prior to its implementation profit from simulation and visualisation capabilities of MOSAIK-M.
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Affiliation(s)
- O J Bott
- Institute for Medical Informatics, Technical University of Braunschweig, Germany.
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Bienert M, Mehlis B, Kühler M, Bergmann J, Niedrich H. Synthese von Halogenacetyl- und Chlorambucil-Peptiden des Eledoisins, Physalaemins und der Substanz P als potentielle Affinitätsmarker. ACTA ACUST UNITED AC 2004. [DOI: 10.1002/prac.19783200213] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [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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Bergmann J, Bergmann R, Janetzky B, Singh S, Preddie E. PrP Sc-like prion protein conformer in sudden infant death syndrome brain. Acta Neuropathol 2004; 107:66-8. [PMID: 14605831 DOI: 10.1007/s00401-003-0782-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2003] [Revised: 09/12/2003] [Accepted: 09/22/2003] [Indexed: 10/26/2022]
Abstract
Nothing is known about the pathophysiology of sudden infant death syndrome (SIDS). Here we show the presence of misfolded prion protein (PrP(Sc)-like) in extracts of various sections of the brains of two SIDS victims. DNA sequence information for one of these (death at 12 days) revealed two nucleotide variants in the protein coding region of the PrP gene. This may be a key finding in the understanding of SIDS pathology, and may suggest ways for identifying risk factors for SIDS in newborn infants.
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Affiliation(s)
- J Bergmann
- Altegen Inc., Wilmington, Delaware, USA.
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Maywald O, Buchheidt D, Bergmann J, Schoch C, Ludwig WD, Reiter A, Hastka J, Lengfelder E, Hehlmann R. Spontaneous remission in adult acute myeloid leukemia in association with systemic bacterial infection-case report and review of the literature. Ann Hematol 2003; 83:189-94. [PMID: 15064869 DOI: 10.1007/s00277-003-0741-y] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2003] [Accepted: 07/21/2003] [Indexed: 02/01/2023]
Abstract
Spontaneous remission of acute myeloid leukemia in the adult is a rare event. We report on a 31-year-old male patient suffering from acute myeloid leukemia (AML) M5a according to the French-American-British (FAB) classification with biphenotypic features in flow cytometric examination and severe bacterial infection with group G streptococci at the time of diagnosis. Because of sepsis and stable clinical conditions, chemotherapy was delayed and antibiotics were administered intravenously. Within 6 weeks a spontaneous remission of AML occurred. Remission lasted for about 2 months. At the time of relapse, a change in phenotype of the leukemic blasts with a loss of B-lymphoid markers could be demonstrated by flow cytometry. The patient was treated with an induction therapy according to the multicentric German AMLCG 2000 schedule. To our knowledge, this is the first report of a spontaneous remission in an AML FAB M5a associated with coexpression of myeloid- and lymphoid-associated antigens on the leukemic blasts. Possible mechanisms of this phenomenon are discussed with a review of the literature.
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Affiliation(s)
- O Maywald
- III. Medizinische Universitätsklinik, Fakultät für Klinische Medizin Mannheim der Universität Heidelberg, Wiesbadener Strasse 7-11, 68305, Mannheim, Germany.
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Hummel M, Buchheidt D, Reiter S, Bergmann J, Hofheinz R, Hehlmann R. Successful treatment of hyperuricemia with low doses of recombinant urate oxidase in four patients with hematologic malignancy and tumor lysis syndrome. Leukemia 2003; 17:2542-4. [PMID: 14523460 DOI: 10.1038/sj.leu.2403161] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Kienzl E, Jellinger K, Janetzky B, Steindl H, Bergmann J. A broader horizon of Alzheimer pathogenesis: ALZAS--an early serum biomarker? J Neural Transm Suppl 2003:87-95. [PMID: 12456054 DOI: 10.1007/978-3-7091-6139-5_9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/27/2023]
Abstract
Recently, a novel risk gene protein expressed in elderly patients with the diagnosis of Alzheimer disease (AD) was discovered on chromosome 21 within the APP (amyloid precursor protein) region. This 79 amino acid protein, ALZAS (Alzheimer Associated Protein) contains the beta-amyloid peptide 1-42 fragment, the APP transmembrane signal, and a unique 12 amino acid c-terminal which is not present in any known allele of the APP gene. Reverse transcription-PCR revealed that the transcript of ALZAS was expressed in cortical and hippocampal regions of human Alzheimer disease brain as well as in leukocytes derived from AD patients. Most specifically, an endogenous antibody was found in patients with confirmed AD, in patients with depression, and in subjects suggested to have presymptomatic AD, where it was directed against epitopes within the intron encoded amino acid c-terminal sequence.
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Affiliation(s)
- E Kienzl
- Vienna Health Board and L. B. Institute of Clinical Neurobiology, Vienna, Austria
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Caumo W, Schmidt AP, Schneider CN, Bergmann J, Iwamoto CW, Adamatti LC, Bandeira D, Ferreira MBC. Preoperative predictors of moderate to intense acute postoperative pain in patients undergoing abdominal surgery. Acta Anaesthesiol Scand 2002; 46:1265-71. [PMID: 12421200 DOI: 10.1034/j.1399-6576.2002.461015.x] [Citation(s) in RCA: 208] [Impact Index Per Article: 9.5] [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: 11/23/2022]
Abstract
BACKGROUND Pain is a sensory and emotional experience that is influenced by physiologic, sensory, affective, cognitive, socio-cultural, and behavioral factors. Consistent with the perspective to improve the postoperative pain control, the present study has the purpose of assessing the effect of presurgical clinical factors, psychological and demographic characteristics as predictors for reporting moderate to intense acute postoperative pain. METHODS A prospective cohort study was performed with 346 inpatients undergoing abdominal elective surgery (ASA physical status I-III, age range 18-60 years). The measuring instruments were Pain Visual Analog Scale, the State-Trait Anxiety Inventory, and the Montgomery-Asberg Depression Rating Scale. Multivariate conditional regression modeling was used to determine independent predictors for moderate to intense acute postoperative pain. RESULTS Moderate to intense acute postoperative pain was associated with status ASA III (odds ratio (OR) = 1.99), age (OR = 4.72), preoperative moderate to intense pain (OR = 2.96), chronic pain (OR = 1.75), high trait-anxiety and depressive mood moderate to intense (OR = 1.74 and OR = 2.00, respectively). Patients undergoing surgery to treat cancer presented lower risk for reporting moderate to intense pain OR = 0.39, as well as those that received the epidural analgesia and multimodal analgesia with systemic opioid (OR = 0.09 and OR = 0.16, respectively). CONCLUSIONS The identification of predictive factors for intense acute postoperative pain may be useful for designing specific preventive interventions to relieve patient suffering. Especially because few of these variables are accessible for medical intervention, which would improve the clinical outcomes and quality of life of patients at risk of moderate to intense acute postoperative pain.
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Affiliation(s)
- W Caumo
- Hospital de Clínicas de Porto Alegre and Psychology Institute and Pharmacology Department, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul (UFRGS), Brazil.
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Krämer A, Schultheis B, Bergmann J, Willer A, Hegenbart U, Ho AD, Goldschmidt H, Hehlmann R. Alterations of the cyclin D1/pRb/p16(INK4A) pathway in multiple myeloma. Leukemia 2002; 16:1844-51. [PMID: 12200702 DOI: 10.1038/sj.leu.2402609] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2002] [Accepted: 03/28/2002] [Indexed: 01/12/2023]
Abstract
The retinoblastoma protein (pRb), p16(INK4A), D-type cyclins, and their partners cyclin-dependent kinase (CDK) 4 and 6 constitute a G(1) regulatory pathway commonly targeted in tumorigenesis. Several malignancies show a reciprocal correlation between genetic alterations of single members of the pRb pathway. Therefore, we determined the frequency of Rb deletions and cyclin D1 alterations by fluorescence in situ hybridization as well as 5' CpG island hypermethylation of the p16(INK4A)gene using methylation-specific polymerase chain reaction in bone marrow mononuclear cells from 82 individuals with plasma cell disorders. Alterations in at least one of the components of the pathway were found in 75%. Cyclin D1 translocations or amplifications were detected in 14/82 (17.1%), Rb deletions at 13q14 in 23/82 (28%) of the cases, including three (3.6%) homozygous deletions. p16(INK4A) was hypermethylated in 33/57 (57.9%) of the samples. Further analysis revealed a highly significant correlation between cyclin D1 alterations and extramedullar or leukemic myeloma manifestations (P = 0.014; Fisher's test). Whereas Rb deletions seemed to occur alternatively to cyclin D1 alterations, no reciprocal correlation was found between p16(INK4A) hypermethylations and cyclin D1 or Rb locus aberrations. Cyclin D1 locus alterations and Rb deletions were associated with a significantly worse prognosis whereas p16(INK4A) hypermethylation had no impact on survival. We conclude that cyclin D1 and Rb aberrations seem to occur as alternative events in plasma cell malignancies and contribute to clinical course and prognosis. In contrast, although p16(INK4A) hypermethylation is frequent, inactivation of p16(INK4A) seems not to be involved in the pathogenesis of plasma cell disorders.
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MESH Headings
- Chromosome Aberrations
- Chromosome Mapping
- Chromosomes, Human, Pair 11/genetics
- Chromosomes, Human, Pair 13/genetics
- Chromosomes, Human, Pair 14/genetics
- Cyclin D1/genetics
- Cyclin D1/metabolism
- Cyclin-Dependent Kinase Inhibitor p16/genetics
- Cyclin-Dependent Kinase Inhibitor p16/metabolism
- Female
- Gene Deletion
- Humans
- Immunoglobulins
- Leukemia, Plasma Cell/genetics
- Leukemia, Plasma Cell/metabolism
- Leukemia, Plasma Cell/pathology
- Male
- Middle Aged
- Multiple Myeloma/genetics
- Multiple Myeloma/metabolism
- Multiple Myeloma/pathology
- Neoplasm Staging
- Retinoblastoma Protein/genetics
- Retinoblastoma Protein/metabolism
- Survival Rate
- Translocation, Genetic
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Affiliation(s)
- A Krämer
- Medizinische Klinik und Poliklinik V, Universität Heidelberg, Heidelberg, Germany
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39
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Drillich M, Bergmann J, Falkenberg U, Kurth A, Heuwieser W. [Effects of the intensity of a post partum examination on the fertility performance of high yielding dairy cows]. Dtsch Tierarztl Wochenschr 2002; 109:386-90. [PMID: 12395577] [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: 02/27/2023]
Abstract
Two methods for a scheduled post partum examination were compared on a commercial dairy farm. In Group 1, all cows (n = 601) were examined by rectal palpation between day 20 and 26 post partum for signs of endometritis (vaginal discharge, enlarged uterus). In Group 2, all cows (n = 652) were examined by external inspection for vaginal discharge as a sign for endometritis. In both groups all cows with endometritis were treated twice with prostaglandin F2 alpha (25 mg of dinoprost) in a 14-day interval. The proportion of cows with signs of endometritis was 33.3% and 17.2% in Group 1 and Group 2, respectively (p < 0.05). In Group 1, the conception rate (39.0% vs 49.3%) and the proportion of cows pregnant (60.5% vs 72.6%) were lower for cows with endometritis than for cows without endometritis. In Group 2, no significant differences were found in reproductive performance for cows with and without signs of endometritis. No significant differences in reproductive performance were found for cows with endometritis between the two groups. Also, for cows without endometritis no significant differences in reproductive performance were found between the groups. It is concluded that the post partum examination by rectal palpation was more sensitive in finding cows with endometritis. However, with regard to the reproductive performance the more sensitive method was not more effective than the method based on systematic external inspection.
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Affiliation(s)
- M Drillich
- AG Bestandsbetreuung& Qualitätsmanagement, Tierklinik für Fortpflanzung, FU Berlin. www.bestandsbetreuung.de
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Bergmann J, Kleeberg R. Improving the accuracy of size/micro strain estimation by first principles - Monte Carlo ray-traced fundamental parameters profiles. Acta Crystallogr A 2002. [DOI: 10.1107/s0108767302094734] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/03/2023] Open
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Caumo W, Hidalgo MPL, Schmidt AP, Iwamoto CW, Adamatti LC, Bergmann J, Ferreira MBC. Effect of pre-operative anxiolysis on postoperative pain response in patients undergoing total abdominal hysterectomy. Anaesthesia 2002; 57:740-6. [PMID: 12133084 DOI: 10.1046/j.1365-2044.2002.02690.x] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.8] [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: 11/20/2022]
Abstract
In a double blind, placebo-controlled trial, we have assessed the effects of pre-operative anxiolysis on postoperative pain scores in 112 ASA I-II women, aged 18-65 years, scheduled to undergo total abdominal hysterectomy. Subjects were randomly allocated to receive either oral diazepam 10 mg (n=56) or placebo (n=56) pre-operatively. Postoperative anxiety, pain scores, analgesic consumption, and sedation were evaluated at several time points during the first 24 h following surgery. Postoperative pain scores were found to be significantly higher in the diazepam group. Trait and state anxiety showed a significant effect on pain scores, independent of the treatment group. No difference was found between the groups in morphine consumption, but there was a significant reduction in morphine consumption with time.
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Affiliation(s)
- W Caumo
- Anaesthesia Service, Hospital de Clínicas de Port Alegre, Universidade Federal do Rio Grande do Sul, UFRGS, Brazil.
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Lewis DK, Bergmann J, Manjoney R, Paddock R, Kalra BL. Rates of reactions of cyclopropane, cyclobutane, cyclopentene,and cyclohexene in the presence of boron trichloride. ACTA ACUST UNITED AC 2002. [DOI: 10.1021/j150662a051] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Abstract
We identified risk factors for postoperative anxiety and quantified their effect on 712 adults between 18 and 60 years of age (ASA I-III physical status) undergoing elective surgery under general anaesthesia, neural blockade or both. The measuring instruments were a structured questionnaire, a pain visual analogue scale, the McGill Pain Questionnaire, the State-Trait Anxiety Inventory, the Montgomery-Asberg Depression Rating Scale, a Self-Reporting Questionnaire-20, and a Self-Perception of Future Questionnaire. Multivariate conditional regression modelling taking into account the hierarchical relationship between risk factors revealed that postoperative anxiety was associated with ASA status III (OR = 1.48), history of smoking (1.62), moderate to intense postoperative pain (OR = 2.62) and high pain rating index (OR = 2.35), minor psychiatric disorders (OR = 1.87), pre-operative state-anxiety (OR = 2.65), and negative future perception (OR = 2.20). Neural block anaesthesia (OR = 0.72), systemic multimodal analgesia (OR = 0.62) and neuroaxial opioids with or without local anaesthesia (OR = 0.63) were found to be protective factors against postoperative anxiety.
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Affiliation(s)
- W Caumo
- Anaesthesia Service, Hospital de Clínicas de Porto Alegre, Brazil
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Abstract
BACKGROUND Patients who undergo surgery experience acute psychological distress in the preoperative period. The objective of this study was to identify and quantify the effect of risk factors for preoperative anxiety in adults. METHODS A cross-sectional study was performed with 592 inpatients scheduled for elective surgery. Age ranged from 18 to 60 years (ASA physical status I-III). Demographic information was collected using a structured questionnaire. The measuring instruments were a visual analog scale, the State-Trait Anxiety Inventory; the Montgomery-Asberg Depression Rating Scale, the WHO Self-Reporting Questionnaire-20, and the future self-perception questionnaire. Multivariate conditional regression modeling was used to control confounding factors and to determine independent predictors of preoperative anxiety, taking into account the hierarchical relationship between risk factors. RESULTS High preoperative anxiety was associated with history of cancer (odds ratio (OR)=2.26) and smoking (OR=7.47), psychiatric disorders (OR=5.93), negative future perception (OR= 2.30), moderate to intense depressive symptoms (3.22), high trait-anxiety (3.83), moderate to intense pain (2.12), medium surgery (OR=1.52), female gender (OR=2.0), ASA category III (OR=3.41), up to 12 years of education (OR=1.36), and more than 12 years of education (OR=1.68). Previous surgery (OR= 0.61) was associated with lower risk for preoperative state-anxiety. CONCLUSIONS History of cancer and smoking, psychiatric disorders, negative future perception, moderate to intense depressive symptoms, high trait-anxiety, moderate to intense pain, medium surgery, female gender, ASA category III, up to 12 years of education and more than 12 years of education constituted independent risk factors for preoperative state-anxiety. Previous surgery reduced the risk for preoperative anxiety.
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Affiliation(s)
- W Caumo
- Anesthesia Service, Hospital de Clínicas de Porto Alegre, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Brazil
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Abstract
Texture effects caused by preferred orientation can be corrected in Rietveld analysis by an alternative algorithm presented in this contribution. This algorithm is equivalent to models using symmetrized linear combinations of spherical harmonic functions, but it is unique to all Laue classes and to all orders. Positive definiteness of the polar-axis density is achieved by the exponential method. The outlined algorithm was tested during Rietveld refinement of selected polycrystal samples. The algorithm was proven to be numerically robust and satisfactorily described deviations from the ideal intensity ratios of the Bragg reflections caused by the texture of the samples.
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Krämer A, Löffler H, Bergmann J, Hochhaus A, Hehlmann R. Proliferating status of peripheral blood progenitor cells from patients with BCR/ABL-positive chronic myelogenous leukemia. Leukemia 2001; 15:62-8. [PMID: 11243401 DOI: 10.1038/sj.leu.2402005] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.5] [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: 11/09/2022]
Abstract
To investigate the mechanisms behind the leukemic expansion of BCR/ABL-positive chronic myelogenous leukemia (CML), we examined the cell cycle status of hematopoietic progenitor cells from peripheral blood (PB) and bone marrow (BM) of 37 patients with newly diagnosed BCR/ABL-positive CML. We found a high proportion of 12.51 +/- 1.19% of CD34+ peripheral blood progenitor cells (PBPC) in S/G2M phase. Comparison of PB and BM from 19 cases revealed similar proliferation rates (10.74 +/- 1.41% vs 15.97 +/- 1.95%). Furthermore, even primitive CD34+/CD38- PBPC displayed high proliferation rates (17.45 +/- 2.98%) in 10 cases examined. In contrast, PBPC from 11 patients with BCR/ABL-negative myeloproliferative disorders were almost noncycling (S/G2M 1.46 +/- 0.47%). When matched pairs of PB and BM from six patients with BCR/ABL-negative myeloproliferative disorders were examined, only 0.89 +/- 0.41% of the CD34+ PBPC, but 8.29 +/- 3.13% CD34+ cells from BM were in S/G2M phase. Consistently, as compared to 19 patients with newly diagnosed BCR/ABL-positive CML, a significantly lower PB/BM ratio of CD34+ cells in S/G2M phase was found in these six patients with BCR/ABL-negative myeloprolifrative disorders. Administration of the tyrosine kinase inhibitor STI571 to 13 patients with CML in chronic phase, accelerated phase, or blast crisis lead to an inhibition of PBPC proliferation within a few days. Interestingly, CD34+ hematopoietic progenitor cells from BM remained proliferating in five cases examined, indicating that CML PBPC are more easily inhibited by STI571 as compared to CD34+ CML hematopoietic progenitor cells from BM. These data suggest that BCR/ABL leads to an enhanced cell cycle activation of CD34+ cells, which seems to be, at least in part, independent of additional factors provided by the bone marrow microenvironment.
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Affiliation(s)
- A Krämer
- III Medizinische Klinik, Klinikum Mannheim, Universität Heidelberg, Mannheim, Germany
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Denis V, Salord J, Raskine L, Sanson-Le Pors M, Diemer M, Caulin C, Bergmann J. [Survey of the negativation of bacteriologic tests in patients with active pulmonary tuberculosis: how long should the isolation be?]. Ann Med Interne (Paris) 2000; 151:618-23. [PMID: 11173704] [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: 02/18/2023]
Abstract
The risk of contamination by contact with patients with tuberculosis is reduced by isolation of patients until negativation of direct sputum analysis for the research of tuberculosis bacilli. To evaluate the efficacy of this isolation, we compared, in 32 patients with active tuberculosis, the results of direct examination and culture of the sputum and the clinical outcome. Thirty-two successive patients hospitalized in the same internal medicine unit, received antituberculosis drugs and had 3 sputum examinations per week with direct analysis and culture until negativation of the 3 direct examinations. Then, isolation ended. At the time of direct-negativation, 14 of the 32 patients kept positive cultures. In the 18 remaining subjects, the cultures became negative, about seven days before direct-negativation. Patients with negative cultures had more frequently weight increase (83% versus 71%), were more rapidly without fever (11 days versus 19 days), had less cough and had less severe radiologic disease (50% versus 75%) compared to patients with positive cultures but these differences were not statistically significant due to the small sample size. In tuberculosis patients, 3 successive negative direct sputum examinations do not eliminate the risk of tuberculosis transmission, specially to hospitalized or immunocompromised patients. The risk of contamination in these cases, although unknown, may be weak. Terminating isolation should not be based on sputum examination alone, but also on other factors such as the clinical course (resolution of cough and fever, weight), the initial number of bacilli, and the severity of the radiological lesions.
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Affiliation(s)
- V Denis
- Service de Médecine A, Hôpital Lariboisière, Paris
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48
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Abstract
In extracts prepared from various fruits as well as in fruit juices a single tryptophan glycoconjugate was detected by HPLC-MS analysis. Product ion spectra demonstrated the N-glycosidic linkage of a hexose moiety to the indole nitrogen. For structure elucidation, the novel tryptophan glycoside was isolated from pear juice and identified as N(1)-(beta-D-glucopyranosyl-(4)C(1))-L-tryptophan by (1)H, HH-COSY and (13)C NMR spectroscopy. Finally, we disclosed the biosynthetic origin of the novel tryptophan metabolite by demonstrating the enzymatic glycosylation of deuterium-labeled tryptophan, which was applied to pear fruit.
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Affiliation(s)
- S Diem
- Lehrstuhl für Lebensmittelchemie, Universität Würzburg, Am Hubland, 97074 Würzburg, Germany
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Bergmann J, Luft B, Boehmann S, Runnebaum B, Gerhard I. [The efficacy of the complex medication Phyto-Hypophyson L in female, hormone-related sterility. A randomized, placebo-controlled clinical double-blind study]. Forsch Komplementarmed Klass Naturheilkd 2000; 7:190-9. [PMID: 11025394 DOI: 10.1159/000021343] [Citation(s) in RCA: 21] [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] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
OBJECTIVE AND DESIGN In a prospective, randomized, placebo-controlled, double-blind study, the effects of Phyto Hypophyson L (Steierl-Pharma GmbH, Herrsching, Germany), an Agnus castus-containing homeopathic preparation, were investigated in 67 women with fertility disorders. PATIENTS AND METHODS 37 women with oligomenorrhea and 30 women with amenorrhea received 50 drops of Phyto Hypophyson L or placebo 3 times a day over 3 months or 3 cycles. OUTCOME MEASURE AND RESULTS: The outcome measure being spontaneous menstruation, improved concentration of progesterone in the luteal phase, shortening of the cycle, earlier ovulation, and pregnancy was achieved in 38 out of 67 women. It was achieved more often from women with oligomenorrhea in the Phyto Hypophyson L group compared to the placebo group (82 versus 45%, p = 0.021). However, there was no significant effect when viewing the whole group. The baby take-home rate during the therapy and 6 months after the end of the therapy showed a ratio of 6 : 2 (18.7 : 6.4%). This result was not significant. Furthermore, in the oligomenorrhea verum group we observed a significant increase of progesterone during the luteal phase compared to the oligomenorrhea placebo group. Only very few undesirable drug effects were observed. CONCLUSION In women with sterility and oligomenorrhea, a treatment with Phyto Hypophyson L can be recommended over a period of 3-6 months.
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Affiliation(s)
- J Bergmann
- Abteilung für Gynäkologische Endokrinologie und Fertilitätsstörungen, Universitäts-Frauenklinik, Heidelberg
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Brachwitz H, Bergmann J, Thomas Y, Wollny T, Langen P. Synthesis and antiproliferative potency of 9-beta-D-arabinofuranosyl-2-fluoroadenine phospholipid adducts. Bioorg Med Chem 1999; 7:1195-200. [PMID: 10428391 DOI: 10.1016/s0968-0896(99)00027-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [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: 11/15/2022]
Abstract
Three novel alkylphospholipid and four novel O-alkylglycerophospholipid derivatives of fludarabine (F-ara-AMP), known as a drug for the clinical treatment of chronic lymphocytic leukemia, were synthesized. The antiproliferative activity was determined in comparison to the parent nucleoside fludarabine in an immortalized but nontumorigenic human mammary epithelial cell line (H 184 A1N4), in two human breast tumor cell lines (MaTu and MCF7), and in two leukemic cell lines (HL 60 and Daudi). Fludarabine inhibited the growth of the leucemic cell lines very effectively. The breast tumor cell lines responded with much less sensitivity. The antiproliferative potency of the new compounds strongly depended on the chemical structure of the lipid component, and derivatives with a high effectiveness against one or both of the breast tumor cell lines were described.
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Affiliation(s)
- H Brachwitz
- Max-Delbrück-Centrum Berlin-Buch, Berlin, Germany.
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