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Okruszek Ł, Jarkiewicz M, Piejka A, Chrustowicz M, Krawczyk M, Schudy A, Harvey PD, Penn DL, Ludwig K, Green MF, Pinkham AE. Loneliness is associated with mentalizing and emotion recognition abilities in schizophrenia, but only in a cluster of patients with social cognitive deficits. J Int Neuropsychol Soc 2024; 30:27-34. [PMID: 37154103 DOI: 10.1017/s1355617723000206] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
OBJECTIVE Loneliness is a concern for patients with schizophrenia. However, the correlates of loneliness in patients with schizophrenia are unclear; thus, the aim of the study is to investigate neuro- and social cognitive mechanisms associated with loneliness in individuals with schizophrenia. METHOD Data from clinical, neurocognitive, and social cognitive assessments were pooled from two cross-national samples (Poland/USA) to examine potential predictors of loneliness in 147 patients with schizophrenia and 103 healthy controls overall. Furthermore, the relationship between social cognition and loneliness was explored in clusters of patients with schizophrenia differing in social cognitive capacity. RESULTS Patients reported higher levels of loneliness than healthy controls. Loneliness was linked to increased negative and affective symptoms in patients. A negative association between loneliness and mentalizing and emotion recognition abilities was found in the patients with social-cognitive impairments, but not in those who performed at normative levels. CONCLUSIONS We have elucidated a novel mechanism which may explain previous inconsistent findings regarding the correlates of loneliness in individuals with schizophrenia.
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Affiliation(s)
- Ł Okruszek
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - M Jarkiewicz
- Third Department of Psychiatry, Institute of Psychiatry and Neurology, Warsaw, Poland
| | - A Piejka
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - M Chrustowicz
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - M Krawczyk
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Warsaw, Poland
| | - A Schudy
- Faculty of Psychology, University of Warsaw, Warsaw, Poland
| | - P D Harvey
- University of Miami Miller School of Medicine, Miami VA Healthcare System, Miami, FL, USA
| | - D L Penn
- Department of Psychology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
- School of Psychology, Australian Catholic University, Melbourne, Victoria, Australia
| | - K Ludwig
- Department of Psychology, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
| | - M F Green
- Desert Pacific Mental Illness Research, Education, and Clinical Center, VA Greater Los Angeles, Los Angeles, CA, USA
- Department of Psychiatry and Biobehavioral Sciences, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - A E Pinkham
- Department of Psychology, University of Texas at Dallas, Richardson, TX, USA
- Department of Psychiatry, UT Southwestern Medical Center, Dallas, TX, USA
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Okruszek Ł, Piejka A, Chrustowicz M, Krawczyk M, Jarkiewicz M, Schudy A, Ludwig K, Pinkham A. Social cognitive bias increases loneliness both directly and by decreasing social connection in patients with schizophrenia. Schizophr Res 2023; 256:72-78. [PMID: 37163867 DOI: 10.1016/j.schres.2023.04.016] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 04/04/2023] [Accepted: 04/30/2023] [Indexed: 05/12/2023]
Abstract
While considerable emphasis has been put on investigating the mechanisms that drive reduced social connection in patients with schizophrenia (SCZ), recent studies have increasingly focused on the issue of loneliness in SCZ. As both social cognitive bias and self-reported empathy predict loneliness in non-clinical populations, the current study aims to examine the relationship between loneliness, reduced social connection and social cognitive biases, and self-reported empathy in SCZ. Ninety-three adult SCZ and sixty-six matched healthy individuals completed a battery of questionnaires measuring loneliness and social connection (Revised-UCLA Loneliness Scale, Lubben-Social Network Scale, Social Disconnectedness Scale), cognitive biases (Ambiguous Intentions Hostility Questionnaire, Davos Assessment of Cognitive Biases Scale, Cognitive Biases Questionnaire for psychosis) and self-reported empathy (Interpersonal Reactivity Index). Significant predictors of loneliness in SCZ were entered into two latent variables ("Social Threat Bias", "Social Connection"), and structural equation modeling was used to explore the direct and indirect relationships between Social Threat Bias, symptoms. and loneliness in SCZ. Patients reported higher levels of loneliness, cognitive biases and personal distress compared to controls. Furthermore, SCZ reported less social connection and perspective taking compared to controls. Structural equation modeling revealed that Social Threat Bias was linked to increased loneliness in SCZ both directly and indirectly via decreased social connection. Negative symptoms were directly linked with loneliness, while the association between affective symptoms and loneliness was mediated via Social Threat Bias. The results of the current study suggest that social threat bias should be considered while planning the interventions aimed to reduce loneliness in schizophrenia.
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Affiliation(s)
- Ł Okruszek
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Poland.
| | - A Piejka
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Poland
| | - M Chrustowicz
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Poland
| | - M Krawczyk
- Social Neuroscience Lab, Institute of Psychology, Polish Academy of Sciences, Poland
| | - M Jarkiewicz
- Third Department of Psychiatry, Institute of Psychiatry and Neurology, Poland
| | - A Schudy
- Faculty of Psychology, University of Warsaw, Poland
| | - K Ludwig
- Department of Psychology, University of North Carolina at Chapel Hill, United States of America
| | - A Pinkham
- Department of Psychology, University of Texas at Dallas, United States of America; Department of Psychiatry, UT Southwestern Medical Center, United States of America
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Mathieu F, Ludwig K, Thomas W. Rückkehr einer vergessenen Erkrankung? Monatsschr Kinderheilkd 2023. [DOI: 10.1007/s00112-023-01711-z] [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: 02/24/2023]
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Staiger RD, Rössler F, Kim MJ, Brown C, Trenti L, Sasaki T, Uluk D, Campana JP, Giacca M, Schiltz B, Bahadoer RR, Lee KY, Kupper BEC, Hu KY, Corcione F, Paredes SR, Spampati S, Ukegjini K, Jedrzejczak B, Langer D, Stakelum A, Park JW, Phang PT, Biondo S, Ito M, Aigner F, Vaccaro CA, Panis Y, Kartheuser A, Peeters KCMJ, Tan KK, Aguiar S, Ludwig K, Bracale U, Young CJ, Dziki A, Ryska M, Winter DC, Jenkins JT, Kennedy RH, Clavien PA, Puhan MA, Turina M. Benchmarks in colorectal surgery: multinational study to define quality thresholds in high and low anterior resection. Br J Surg 2022; 109:1274-1281. [PMID: 36074702 DOI: 10.1093/bjs/znac300] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/15/2022] [Accepted: 07/31/2022] [Indexed: 12/31/2022]
Abstract
BACKGROUND Benchmark comparisons in surgery allow identification of gaps in the quality of care provided. The aim of this study was to determine quality thresholds for high (HAR) and low (LAR) anterior resections in colorectal cancer surgery by applying the concept of benchmarking. METHODS This 5-year multinational retrospective study included patients who underwent anterior resection for cancer in 19 high-volume centres on five continents. Benchmarks were defined for 11 relevant postoperative variables at discharge, 3 months, and 6 months (for LAR). Benchmarks were calculated for two separate cohorts: patients without (ideal) and those with (non-ideal) outcome-relevant co-morbidities. Benchmark cut-offs were defined as the 75th percentile of each centre's median value. RESULTS A total of 3903 patients who underwent HAR and 3726 who had LAR for cancer were analysed. After 3 months' follow-up, the mortality benchmark in HAR for ideal and non-ideal patients was 0.0 versus 3.0 per cent, and in LAR it was 0.0 versus 2.2 per cent. Benchmark results for anastomotic leakage were 5.0 versus 6.9 per cent for HAR, and 13.6 versus 11.8 per cent for LAR. The overall morbidity benchmark in HAR was a Comprehensive Complication Index (CCI®) score of 8.6 versus 14.7, and that for LAR was CCI® score 11.9 versus 18.3. CONCLUSION Regular comparison of individual-surgeon or -unit outcome data against benchmark thresholds may identify gaps in care quality that can improve patient outcome.
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Affiliation(s)
- Roxane D Staiger
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Fabian Rössler
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Min Jung Kim
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - Carl Brown
- Department of Surgery, University of British Columbia, St Paul's Hospital, Vancouver, British Columbia, Canada
| | - Loris Trenti
- Bellvitge University Hospital, Department of General and Digestive Surgery, and IDIBELL, University of Barcelona, Barcelona, Spain
| | - Takeshi Sasaki
- Department of Colorectal Surgery and Surgical Technology, National Cancer Centre Hospital East, Kashiwa, Chiba, Japan
| | - Deniz Uluk
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Juan P Campana
- Section of Colorectal Surgery, Hospital Italiano de Buenos Aires and Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB), Buenos Aires, Argentina
| | - Massimo Giacca
- Department of Colorectal Surgery, Beaujon Hospital and University of Paris, Clichy, France
| | - Boris Schiltz
- Department of Colorectal Surgery, Cliniques Universitaires St-Luc - UCL, Brussels, Belgium
| | - Renu R Bahadoer
- Department of Surgery, Leiden University Medical Centre, Leiden, the Netherlands
| | - Kai-Yin Lee
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, University Surgical Cluster, National University Health System, Singapore
| | | | - Katherine Y Hu
- Division of Colorectal Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Francesco Corcione
- Department of General Surgery and Specialty, University Federico II of Naples, Naples, Italy
| | - Steven R Paredes
- Department of Colorectal Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Sebastiano Spampati
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Kristjan Ukegjini
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
| | | | - Daniel Langer
- Surgery Department, Charles University and Central Military Hospital, Prague, Czech Republic
| | - Aine Stakelum
- Centre for Colorectal Disease, St Vincent's University Hospital, Dublin, Ireland
| | - Ji Won Park
- Department of Surgery, Seoul National University College of Medicine, Seoul, Korea
| | - P Terry Phang
- Department of Surgery, University of British Columbia, St Paul's Hospital, Vancouver, British Columbia, Canada
| | - Sebastiano Biondo
- Bellvitge University Hospital, Department of General and Digestive Surgery, and IDIBELL, University of Barcelona, Barcelona, Spain
| | - Masaaki Ito
- Department of Colorectal Surgery and Surgical Technology, National Cancer Centre Hospital East, Kashiwa, Chiba, Japan
| | - Felix Aigner
- Department of Surgery, Campus Charité Mitte and Campus Virchow-Klinikum, Charité-Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Berlin, Germany
| | - Carlos A Vaccaro
- Section of Colorectal Surgery, Hospital Italiano de Buenos Aires and Instituto de Medicina Traslacional e Ingeniería Biomédica (IMTIB), Buenos Aires, Argentina
| | - Yves Panis
- Department of Colorectal Surgery, Beaujon Hospital and University of Paris, Clichy, France
| | - Alex Kartheuser
- Department of Colorectal Surgery, Cliniques Universitaires St-Luc - UCL, Brussels, Belgium
| | - K C M J Peeters
- Department of Surgery, Leiden University Medical Centre, Leiden, the Netherlands
| | - Ker-Kan Tan
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, University Surgical Cluster, National University Health System, Singapore
| | | | - Kirk Ludwig
- Division of Colorectal Surgery, Department of Surgery, Medical College of Wisconsin, Milwaukee, WI, USA
| | - Umberto Bracale
- Department of General Surgery and Specialty, University Federico II of Naples, Naples, Italy
| | - Christopher J Young
- Department of Colorectal Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Adam Dziki
- Centre for Bowel Diseases, Brzeziny, Poland.,Department of General and Colorectal Surgery, Medical University, Lodz, Poland
| | - Miroslav Ryska
- Surgery Department, Charles University and Central Military Hospital, Prague, Czech Republic
| | - Des C Winter
- Centre for Colorectal Disease, St Vincent's University Hospital, Dublin, Ireland
| | - John T Jenkins
- Department of Colorectal Surgery, St Mark's Hospital, London, UK
| | - Robin H Kennedy
- Department of Colorectal Surgery, St Mark's Hospital, London, UK
| | - Pierre-Alain Clavien
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
| | - Milo A Puhan
- Department of Epidemiology, Epidemiology, Biostatistics and Prevention Institute, University of Zurich, Zurich, Switzerland
| | - Matthias Turina
- Department of Colorectal Surgery, University Hospital Zurich, Zurich, Switzerland
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Chakrabarti S, Benrud R, Chau J, Hall W, Shreenivas A, Erickson B, Peterson C, Ridolfi T, Miller J, Banerjee A, Thomas J, Sharif S, Fei N, Ludwig K, Olshan P, Palsuledesai C, Malhotra M, Jurdi A, Aleshin A, Kasi P. P-39 Utility of circulating tumor DNA (ctDNA) to assess tumor response in patients with locally advanced rectal cancer undergoing neoadjuvant therapy. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.04.130] [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: 11/29/2022] Open
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Ludwig K, Seiltgens C, Ibba A, Saran N, Ouellet JA, Glorieux F, Rauch F. Craniocervical abnormalities in osteogenesis imperfecta type V. Osteoporos Int 2022; 33:177-183. [PMID: 34350492 DOI: 10.1007/s00198-021-06088-x] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2021] [Accepted: 07/30/2021] [Indexed: 11/28/2022]
Abstract
UNLABELLED Craniocervical abnormalities in osteogenesis imperfecta (OI) such as basilar invagination or cervical kyphosis can cause severe neurological morbidity. These abnormalities may be more frequent in OI type V compared with other OI subtypes of similar disease severity, underlining the importance of screening in this group. INTRODUCTION Craniocervical abnormalities in osteogenesis imperfecta (OI) can cause severe neurological morbidity. Although radiological cranial base abnormalities in OI have been well described in the literature, there are limited data on these abnormalities in OI type V and their association with clinical sequelae. METHODS A retrospective case series on patients with craniocervical abnormalities in OI type V at our institution. RESULTS Craniocervical abnormalities were present in 7 of 37 patients with OI type V (19%). For 5 patients (age at last follow-up: 5 to 26 years; 2 females), sufficient information was available for inclusion in the case series. All had genetically confirmed OI type V. Age range at diagnosis of the craniocervical abnormality was 1 day to 18 years. Basilar invagination was present in 3 patients; 2 had cervical kyphosis. Dysplasia of upper cervical vertebrae or base of skull was seen in 3 patients. The severity of the craniocervical abnormality did not clearly correlate with the severity of the OI phenotype. Three patients required surgical intervention (ages 7, 11, and 26 years) due to compression of the spinal cord or brainstem. Craniocervical abnormalities were detected incidentally or on screening in 3 patients, and only 2 had significant positive findings on neurological examination. CONCLUSION A variety of craniocervical abnormalities are seen in OI type V including dysplasia of the cervical vertebrae. These cases highlight the importance of screening patients with OI type V with lateral skull and cervical spine x-rays throughout childhood and after skeletal maturity.
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Affiliation(s)
- K Ludwig
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
| | - C Seiltgens
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
| | - A Ibba
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
| | - N Saran
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatric Surgery, McGill University, Montreal, QC, Canada
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
| | - J A Ouellet
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatric Surgery, McGill University, Montreal, QC, Canada
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
| | - F Glorieux
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada
- Department of Pediatrics, McGill University, Montreal, QC, Canada
- Department of Surgery, Division of Orthopaedic Surgery, McGill University, Montreal, QC, Canada
| | - F Rauch
- Shriners Hospitals for Children, 1003 Boulevard Decarie, Montreal, QC, H4A 0A9, Canada.
- Department of Pediatrics, McGill University, Montreal, QC, Canada.
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Ludwig K, Biancotti R, Alessandrini L, Fassina A. Snot What you Think: mucus or myxoid matrix with epithelioid cells and bubbly cytoplasm? Cytopathology 2021; 33:149-152. [PMID: 34318538 PMCID: PMC9293141 DOI: 10.1111/cyt.13036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 06/23/2021] [Accepted: 07/14/2021] [Indexed: 11/24/2022]
Affiliation(s)
- K Ludwig
- Padua University Hospital, Department of Medicine Pathology & Cytopathology Unit, Padova, Italy
| | - R Biancotti
- University of Padova, Pathology, Padova, Italy
| | - L Alessandrini
- Padua University Hospital, Department of Medicine, Padova, Italy
| | - A Fassina
- University of Padova, Pathology, Padova, Italy
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Beltrán Ponce SE, Erickson BA, Hall WA, Bedi M, Martens MJ, Siker M, Thomas J, George B, Ludwig K, Peterson C, Ridolfi T, Longo JM. Long term clinical outcomes and associated predictors of progression free survival in anal canal cancer. J Gastrointest Oncol 2021; 13:185-196. [DOI: 10.21037/jgo-21-482] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Accepted: 12/22/2021] [Indexed: 11/06/2022] Open
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de Pouvourville G, Andrade L, Touboul C, Ludwig K, Oppe M, Goni J. Valorisation des états de santé du questionnaire de qualité de vie Euroqol-5D-5L. Rev Epidemiol Sante Publique 2020. [DOI: 10.1016/j.respe.2020.03.020] [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] Open
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D'Arcy R, Aschikhin A, Bohlen S, Boyle G, Brümmer T, Chappell J, Diederichs S, Foster B, Garland MJ, Goldberg L, Gonzalez P, Karstensen S, Knetsch A, Kuang P, Libov V, Ludwig K, Martinez de la Ossa A, Marutzky F, Meisel M, Mehrling TJ, Niknejadi P, Põder K, Pourmoussavi P, Quast M, Röckemann JH, Schaper L, Schmidt B, Schröder S, Schwinkendorf JP, Sheeran B, Tauscher G, Wesch S, Wing M, Winkler P, Zeng M, Osterhoff J. FLASHForward: plasma wakefield accelerator science for high-average-power applications. Philos Trans A Math Phys Eng Sci 2019; 377:20180392. [PMID: 31230573 PMCID: PMC6602913 DOI: 10.1098/rsta.2018.0392] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/30/2019] [Indexed: 06/09/2023]
Abstract
The FLASHForward experimental facility is a high-performance test-bed for precision plasma wakefield research, aiming to accelerate high-quality electron beams to GeV-levels in a few centimetres of ionized gas. The plasma is created by ionizing gas in a gas cell either by a high-voltage discharge or a high-intensity laser pulse. The electrons to be accelerated will either be injected internally from the plasma background or externally from the FLASH superconducting RF front end. In both cases, the wakefield will be driven by electron beams provided by the FLASH gun and linac modules operating with a 10 Hz macro-pulse structure, generating 1.25 GeV, 1 nC electron bunches at up to 3 MHz micro-pulse repetition rates. At full capacity, this FLASH bunch-train structure corresponds to 30 kW of average power, orders of magnitude higher than drivers available to other state-of-the-art LWFA and PWFA experiments. This high-power functionality means FLASHForward is the only plasma wakefield facility in the world with the immediate capability to develop, explore and benchmark high-average-power plasma wakefield research essential for next-generation facilities. The operational parameters and technical highlights of the experiment are discussed, as well as the scientific goals and high-average-power outlook. This article is part of the Theo Murphy meeting issue 'Directions in particle beam-driven plasma wakefield acceleration'.
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Affiliation(s)
- R. D'Arcy
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - A. Aschikhin
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - S. Bohlen
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - G. Boyle
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - T. Brümmer
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - J. Chappell
- University College London, Gower Street, London WC1E 6BT, UK
| | - S. Diederichs
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - B. Foster
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
- University of Oxford, Wellington Square, Oxford OX1 2JD, UK
| | - M. J. Garland
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - L. Goldberg
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - P. Gonzalez
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - S. Karstensen
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - A. Knetsch
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - P. Kuang
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - V. Libov
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - K. Ludwig
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - A. Martinez de la Ossa
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - F. Marutzky
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - M. Meisel
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - T. J. Mehrling
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Lawrence Berkeley National Laboratory, University of California, Berkeley, CA 94720, USA
| | - P. Niknejadi
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - K. Põder
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - P. Pourmoussavi
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - M. Quast
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J. -H. Röckemann
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - L. Schaper
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - B. Schmidt
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - S. Schröder
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - J. -P. Schwinkendorf
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - B. Sheeran
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - G. Tauscher
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - S. Wesch
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - M. Wing
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- University College London, Gower Street, London WC1E 6BT, UK
| | - P. Winkler
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
- Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany
| | - M. Zeng
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
| | - J. Osterhoff
- Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany
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De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Ž, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, De Backer G, Jankowski P, Kotseva K, Mirrakhimov E, Reiner Z, Rydén L, Tokgözoğlu L, Wood D, De Bacquer D, Kotseva K, De Backer G, Abreu A, Aguiar C, Badariene J, Bruthans J, Castro Conde A, Cifkova R, Crowley J, Davletov K, Bacquer DD, De Smedt D, De Sutter J, Deckers J, Dilic M, Dolzhenko M, Druais H, Dzerve V, Erglis A, Fras Z, Gaita D, Gotcheva N, Grobbee D, Gyberg V, Hasan Ali H, Heuschmann P, Hoes A, Jankowski P, Lalic N, Lehto S, Lovic D, Maggioni A, Mancas S, Marques-Vidal P, Mellbin L, Miličić D, Mirrakhimov E, Oganov R, Pogosova N, Reiner Ž, Rydén L, Stagmo M, Störk S, Sundvall J, Tokgözoğlu L, Tsioufis K, Vulic D, Wood D, Wood D, Kotseva K, Jennings C, Adamska A, Adamska S, Rydén L, Mellbin L, Tuomilehto J, Schnell O, Druais H, Fiorucci E, Glemot M, Larras F, Missiamenou V, Maggioni A, Taylor C, Ferreira T, Lemaitre K, Bacquer DD, De Backer G, Raman L, Sundvall J, DeSmedt D, De Sutter J, Willems A, De Pauw M, Vervaet P, Bollen J, Dekimpe E, Mommen N, Van Genechten G, Dendale P, Bouvier C, Chenu P, Huyberechts D, Persu A, Dilic M, Begic A, Durak Nalbantic A, Dzubur A, Hadzibegic N, Iglica A, Kapidjic S, Osmanagic Bico A, Resic N, Sabanovic Bajramovic N, Zvizdic F, Vulic D, Kovacevic-Preradovic T, Popovic-Pejicic S, Djekic D, Gnjatic T, Knezevic T, Kovacevic-Preradovic T, Kos L, Popovic-Pejicic S, Stanetic B, Topic G, Gotcheva N, Georgiev B, Terziev A, Vladimirov G, Angelov A, Kanazirev B, Nikolaeva S, Tonkova D, Vetkova M, Milicic D, Reiner Ž, Bosnic A, Dubravcic M, Glavina M, Mance M, Pavasovic S, Samardzic J, Batinic T, Crljenko K, Delic-Brkljacic D, Dula K, Golubic K, Klobucar I, Kordic K, Kos N, Nedic M, Olujic D, Sedinic V, Blazevic T, Pasalic A, Percic M, Sikic J, Bruthans J, Cífková R, Hašplová K, Šulc P, Wohlfahrt P, Mayer O, Cvíčela M, Filipovský J, Gelžinský J, Hronová M, Hasan-Ali H, Bakery S, Mosad E, Hamed H, Ibrahim A, Elsharef M, Kholef E, Shehata A, Youssef M, Elhefny E, Farid H, Moustafa T, Sobieh M, Kabil H, Abdelmordy A, Lehto S, Kiljander E, Kiljander P, Koukkunen H, Mustonen J, Cremer C, Frantz S, Haupt A, Hofmann U, Ludwig K, Melnyk H, Noutsias M, Karmann W, Prondzinsky R, Herdeg C, Hövelborn T, Daaboul A, Geisler T, Keller T, Sauerbrunn D, Walz-Ayed M, Ertl G, Leyh R, Störk S, Heuschmann P, Ehlert T, Klocke B, Krapp J, Ludwig T, Käs J, Starke C, Ungethüm K, Wagner M, Wiedmann S, Tsioufis K, Tolis P, Vogiatzi G, Sanidas E, Tsakalis K, Kanakakis J, Koutsoukis A, Vasileiadis K, Zarifis J, Karvounis C, Crowley J, Gibson I, Houlihan A, Kelly C, O'Donnell M, Bennati M, Cosmi F, Mariottoni B, Morganti M, Cherubini A, Di Lenarda A, Radini D, Ramani F, Francese M, Gulizia M, Pericone D, Davletov K, Aigerim K, Zholdin B, Amirov B, Assembekov B, Chernokurova E, Ibragimova F, Kodasbayev A, Markova A, Mirrakhimov E, Asanbaev A, Toktomamatov U, Tursunbaev M, Zakirov U, Abilova S, Arapova R, Bektasheva E, Esenbekova J, Neronova K, Asanbaev A, Baigaziev K, Toktomamatov U, Zakirov U, Baitova G, Zheenbekov T, Erglis A, Andrejeva T, Bajare I, Kucika G, Labuce A, Putane L, Stabulniece M, Dzerve V, Klavins E, Sime I, Badariene J, Gedvilaite L, Pečiuraite D, Sileikienė V, Skiauteryte E, Solovjova S, Sidabraite R, Briedis K, Ceponiene I, Jurenas M, Kersulis J, Martinkute G, Vaitiekiene A, Vasiljevaite K, Veisaite R, Plisienė J, Šiurkaitė V, Vaičiulis Ž, Jankowski P, Czarnecka D, Kozieł P, Podolec P, Nessler J, Gomuła P, Mirek-Bryniarska E, Bogacki P, Wiśniewski A, Pająk A, Wolfshaut-Wolak R, Bućko J, Kamiński K, Łapińska M, Paniczko M, Raczkowski A, Sawicka E, Stachurska Z, Szpakowicz M, Musiał W, Dobrzycki S, Bychowski J, Kosior D, Krzykwa A, Setny M, Kosior D, Rak A, Gąsior Z, Haberka M, Gąsior Z, Haberka M, Szostak-Janiak K, Finik M, Liszka J, Botelho A, Cachulo M, Sousa J, Pais A, Aguiar C, Durazzo A, Matos D, Gouveia R, Rodrigues G, Strong C, Guerreiro R, Aguiar J, Abreu A, Cruz M, Daniel P, Morais L, Moreira R, Rosa S, Rodrigues I, Selas M, Gaita D, Mancas S, Apostu A, Cosor O, Gaita L, Giurgiu L, Hudrea C, Maximov D, Moldovan B, Mosteoru S, Pleava R, Ionescu M, Parepa I, Pogosova N, Arutyunov A, Ausheva A, Isakova S, Karpova A, Salbieva A, Sokolova O, Vasilevsky A, Pozdnyakov Y, Antropova O, Borisova L, Osipova I, Lovic D, Aleksic M, Crnokrak B, Djokic J, Hinic S, Vukasin T, Zdravkovic M, Lalic N, Jotic A, Lalic K, Lukic L, Milicic T, Macesic M, Stanarcic Gajovic J, Stoiljkovic M, Djordjevic D, Kostic S, Tasic I, Vukovic A, Fras Z, Jug B, Juhant A, Krt A, Kugonjič U, Chipayo Gonzales D, Gómez Barrado J, Kounka Z, Marcos Gómez G, Mogollón Jiménez M, Ortiz Cortés C, Perez Espejo P, Porras Ramos Y, Colman R, Delgado J, Otero E, Pérez A, Fernández-Olmo M, Torres-LLergo J, Vasco C, Barreñada E, Botas J, Campuzano R, González Y, Rodrigo M, de Pablo C, Velasco E, Hernández S, Lozano C, González P, Castro A, Dalmau R, Hernández D, Irazusta F, Vélez A, Vindel C, Gómez-Doblas J, García Ruíz V, Gómez L, Gómez García M, Jiménez-Navarro M, Molina Ramos A, Marzal D, Martínez G, Lavado R, Vidal A, Rydén L, Boström-Nilsson V, Kjellström B, Shahim B, Smetana S, Hansen O, Stensgaard-Nake E, Deckers J, Klijn A, Mangus T, Peters R, Scholte op Reimer W, Snaterse M, Aydoğdu S, Ç Erol, Otürk S, Tulunay Kaya C, Ahmetoğlu Y, Ergene O, Akdeniz B, Çırgamış D, Akkoyun H Kültürsay S, Kayıkçıoğlu M, Çatakoğlu A, Çengel A, Koçak A, Ağırbaşlı M, Açıksarı G, Çekin M, Tokgözoğlu L, Kaya E, Koçyiğit D, Öngen Z, Özmen E, Sansoy V, Kaya A, Oktay V, Temizhan A, Ünal S, İ Yakut, Kalkan A, Bozkurt E, Kasapkara H, Dolzhenko M, Faradzh C, Hrubyak L, Konoplianyk L, Kozhuharyova N, Lobach L, Nesukai V, Nudchenko O, Simagina T, Yakovenko L, Azarenko V, Potabashny V, Bazylevych A, Bazylevych M, Kaminska K, Panchenko L, Shershnyova O, Ovrakh T, Serik S, Kolesnik T, Kosova H, Wood D, Adamska A, Adamska S, Jennings C, Kotseva K, Hoye P Atkin A, Fellowes D, Lindsay S, Atkinson C, Kranilla C, Vinod M, Beerachee Y, Bennett C, Broome M, Bwalya A, Caygill L, Dinning L, Gillespie A, Goodfellow R, Guy J, Idress T, Mills C, Morgan C, Oustance N, Singh N, Yare M, Jagoda J, Bowyer H, Christenssen V, Groves A, Jan A, Riaz A, Gill M, Sewell T, Gorog D, Baker M, De Sousa P, Mazenenga T, Porter J, Haines F, Peachey T, Taaffe J, Wells K, Ripley D, Forward H, McKie H, Pick S, Thomas H, Batin P, Exley D, Rank T, Wright J, Kardos A, Sutherland SB, Wren L, Leeson P, Barker D, Moreby B, Sawyer J, Stirrup J, Brunton M, Brodison A, Craig J, Peters S, Kaprielian R, Bucaj A, Mahay K, Oblak M, Gale C, Pye M, McGill Y, Redfearn H, Fearnley M. Management of dyslipidaemia in patients with coronary heart disease: Results from the ESC-EORP EUROASPIRE V survey in 27 countries. Atherosclerosis 2019; 285:135-146. [DOI: 10.1016/j.atherosclerosis.2019.03.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 20.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/22/2019] [Accepted: 03/19/2019] [Indexed: 12/16/2022]
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Hardt J, Buhr HJ, Klinger C, Benz S, Ludwig K, Kalff J, Post S. [Quality indicators for colon cancer surgery : Evidence-based development of a set of indicators for the outcome quality]. Chirurg 2019; 89:17-25. [PMID: 29189878 DOI: 10.1007/s00104-017-0559-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND Quality assessment in surgery is gaining in importance. Although sporadic recommendations for quality indicators (QI) in oncological colon surgery can be found in the literature, these are usually not systematically derived from a solid evidence base. Moreover, reference ranges for QI are unknown. OBJECTIVE The aim of this initiative was the development of evidence-based QI for oncological colon resections by an expert panel invited by the German Society of General and Visceral Surgery (DGAV). Reference ranges from the literature and reference values from the Study, Documentation, and Quality Center (StuDoQ)|Colon Cancer Register were compared in order to deduce recommendations which are tailored to the German healthcare system. RESULTS Based on the most recent scientific evidence and agreed by expert consensus, five QI for oncological colon surgery were defined and evaluated according to the QUALIFY tool. Mortality, MTL30 (mortality, transfer to another acute care hospital, or length of stay ≥30 days), anastomotic leakage requiring reintervention, surgical site infections necessitating reopening of the wound and ≥12 lymph nodes in the specimen qualified as QI owing to their relevance, scientific nature, and practicability. Based on the results of the systematic literature search and the statistical analysis of the StuDoQ|Colon Cancer Register, preliminary reference values are proposed for each QI. CONCLUSION The presented set of QI seems appropriate for quality assessment of oncological colon surgery in the context of the German healthcare system. The validity of the QI and the reference values must be reviewed within the framework of their implementation. The StuDoQ|Colon Cancer Register provides a suitable infrastructure for collecting clinical data for quality assessment and risk adjustment.
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Affiliation(s)
- J Hardt
- Chirurgische Klinik, Universitätsmedizin Mannheim (UMM), Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Deutschland
| | - H-J Buhr
- Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV), Berlin, Deutschland
| | - C Klinger
- Deutsche Gesellschaft für Allgemein- und Viszeralchirurgie (DGAV), Berlin, Deutschland
| | - S Benz
- Chirurgische Klinik, Klinikum Sindelfingen-Böblingen, Böblingen, Deutschland
| | - K Ludwig
- Chirurgische Klinik, Klinikum Südstadt Rostock, Rostock, Deutschland
| | - J Kalff
- Chirurgische Klinik, Universitätsklinikum Bonn (UKB), Bonn, Deutschland
| | - S Post
- Chirurgische Klinik, Universitätsmedizin Mannheim (UMM), Theodor-Kutzer-Ufer 1-3, 68167, Mannheim, Deutschland.
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Kelm S, Longo J, Bedi M, Siker M, Thomas J, George B, Ludwig K, Peterson C, Ridolfi T, Erickson B. The Impact of Hemoglobin on Outcomes in Anal Canal Cancer Treated with Definitive Chemoradiation. Int J Radiat Oncol Biol Phys 2018. [DOI: 10.1016/j.ijrobp.2018.07.211] [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: 10/28/2022]
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Celeghin R, Lazzarini E, Bauce B, Cason M, Rigato I, Ludwig K, Corrado D, Thiene G, Basso C, Pilichou K. P321Genetic testing in arrhythmogenic cardiomyopathy: growing complexity embedded in doubts. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- R Celeghin
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - E Lazzarini
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - B Bauce
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - M Cason
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - I Rigato
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - K Ludwig
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - D Corrado
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - G Thiene
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - C Basso
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
| | - K Pilichou
- University of Padova, Department of Cardiac Thoracic and Vascular Sciences, Padua, Italy
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Affiliation(s)
- Kirk Ludwig
- Department of Philosophy, Indiana University, Bloomington, IN, USA
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Abstract
The removal of contaminants prior to the bonding of ceramics is critical for the clinical success of a long-term durable resin bond. This study tested the null hypotheses that there are no contaminants on the zirconia ceramic surface left after try-in simulation, and there are no influences of contamination and cleaning methods on zirconia ceramic bonding durability with 10-methacryloyloxy-decyl dihydrogenphosphate-containing composite resins. After saliva immersion and the use of a silicone disclosing agent, airborne-particle-abraded ceramic specimens were cleaned with acetone, 36% phosphoric acid, additional airborne-particle abrasion, or only water spray. Chemical analyses of specimen surfaces were performed by x-ray photoelectron spectroscopy. The influences of contamination and cleaning methods on ceramic bond durability were examined by tensile testing after 3 or 150 days’ water storage with 37,500 thermal cycles. Contamination, existing after try-in simulation as confirmed by chemical analysis, significantly reduced zirconia ceramic-resin bonds. Airborne-particle abrasion may be the most effective cleaning method.
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Affiliation(s)
- B Yang
- Department of Prosthodontics, Propaedeutics and Dental Materials, Christian-Albrechts University at Kiel, Arnold-Heller-Str. 16, 24105 Kiel, Germany
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Ludwig K, Li J, Venigalla P, Zhang J, Tang X, Tyagi N, Fontenla S, Lee N, Saleh Z. SU-F-J-104: Weekly MRI for Dose Assessment of Organs at Risk During Treatment of HN Cancer of the Oropharynx. Med Phys 2016. [DOI: 10.1118/1.4956012] [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: 11/07/2022] Open
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Ludwig K. Silikose – Sarkoidose – oder etwas anderes? Interaktive Fallvorstellung mit TED. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581206] [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: 10/22/2022]
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Ludwig K. Muskuloskelettale Interventionen. ROFO-FORTSCHR RONTG 2016. [DOI: 10.1055/s-0036-1581487] [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: 10/22/2022]
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Bowsher K, Civillico EF, Coburn J, Collinger J, Contreras-Vidal JL, Denison T, Donoghue J, French J, Getzoff N, Hochberg LR, Hoffmann M, Judy J, Kleitman N, Knaack G, Krauthamer V, Ludwig K, Moynahan M, Pancrazio JJ, Peckham PH, Pena C, Pinto V, Ryan T, Saha D, Scharen H, Shermer S, Skodacek K, Takmakov P, Tyler D, Vasudevan S, Wachrathit K, Weber D, Welle CG, Ye M. Brain–computer interface devices for patients with paralysis and amputation: a meeting report. J Neural Eng 2016; 13:023001. [DOI: 10.1088/1741-2560/13/2/023001] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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El-Atwani O, Norris SA, Ludwig K, Gonderman S, Allain JP. Ion beam nanopatterning of III-V semiconductors: consistency of experimental and simulation trends within a chemistry-driven theory. Sci Rep 2015; 5:18207. [PMID: 26670948 PMCID: PMC4680892 DOI: 10.1038/srep18207] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2015] [Accepted: 10/15/2015] [Indexed: 11/09/2022] Open
Abstract
Several proposed mechanisms and theoretical models exist concerning nanostructure evolution on III-V semiconductors (particularly GaSb) via ion beam irradiation. However, making quantitative contact between experiment on the one hand and model-parameter dependent predictions from different theories on the other is usually difficult. In this study, we take a different approach and provide an experimental investigation with a range of targets (GaSb, GaAs, GaP) and ion species (Ne, Ar, Kr, Xe) to determine new parametric trends regarding nanostructure evolution. Concurrently, atomistic simulations using binary collision approximation over the same ion/target combinations were performed to determine parametric trends on several quantities related to existing model. A comparison of experimental and numerical trends reveals that the two are broadly consistent under the assumption that instabilities are driven by chemical instability based on phase separation. Furthermore, the atomistic simulations and a survey of material thermodynamic properties suggest that a plausible microscopic mechanism for this process is an ion-enhanced mobility associated with energy deposition by collision cascades.
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Affiliation(s)
- O El-Atwani
- School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907.,School of Materials Engineering, Purdue University, West Lafayette, IN 47907.,Birck Nanotechnology Center, West Lafayette, IN 47907
| | - S A Norris
- Department of Mathematics, Southern Methodist University, Dallas, TX 75275
| | - K Ludwig
- Physics Department and Division of Materials Science and Engineering, Boston University, Boston, Massachusetts, 02215, USA
| | - S Gonderman
- School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907
| | - J P Allain
- School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907.,Department of Nuclear, Plasma and Radiological Engineering, University of Illinois at Urbana-Champaign, Urbana, IL, 61801
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Ludwig K, Scharlau U, Schneider Koriath S. [Management of more frequent complications of laparoscopic surgery. Minimally invasive or always open surgery?]. Chirurg 2015; 86:1105-13. [PMID: 26495447 DOI: 10.1007/s00104-015-0101-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
BACKGROUND Two decades after the far-reaching establishment of elective laparoscopic surgery, the questions arise whether and when the benefits of this technology can be sufficiently and safely implemented even in cases of complications. MATERIAL AND METHODS The currently available literature was analyzed in the context of recommendations for the management of complications in laparoscopic surgery. RESULTS Intraoperative and postoperative complications of minimally invasive surgery necessitating treatment are extremely rare and can be expected in only 0.1–5 % of interventions, depending on the complexity of the intervention. In addition to adhesion-related and anatomical limitations, they are responsible for the necessity to convert to open surgery in approximately 40–60 % of the cases. DISCUSSION Due to the relative rarity and great variety of potential complications, there is no scientific evidence at the study level that can give reliable recommendations for a management strategy in every situation. It still has to be decided on an individual basis and depending on the particular clinical situation if a successful laparoscopic management can be sufficiently and safely carried out. It has been found that a number of complications can be well controlled by minimally invasive procedures; however, in addition to a high level of personal experience in laparoscopy, optimal technical, institutional and instrumental conditions must be available. If these factors are not present in total, a conventional open approach should still be given preference.
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Ludwig K, Alaggio R, Dall'Igna P, Lazzari E, d'Amore ESG, Chou PM. Omental mesenteric myxoid hamartoma, a subtype of inflammatory myofibroblastic tumor? Considerations based on the histopathological evaluation of four cases. Virchows Arch 2015; 467:741-747. [PMID: 26386568 DOI: 10.1007/s00428-015-1842-4] [Citation(s) in RCA: 3] [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: 06/16/2015] [Revised: 07/26/2015] [Accepted: 08/20/2015] [Indexed: 12/11/2022]
Abstract
Omental mesenteric myxoid hamartoma (OMH) is a distinctive myxoid lesion of infancy, characterized by a benign clinical behavior. In the current World Health Organization (WHO) classification of soft tissue tumors, it is considered as part of the morphologic spectrum of inflammatory myofibroblastic tumors (IMT), but this relationship with IMT is still subject to debate. Four lesions with histologic features of OMH occurring in newborns and toddlers are described and compared with classic, ALK-positive IMT. All OMH showed a peculiar dot-like immunostaining for ALK, which, in one of the cases, was cytogenetically found to be associated with an inversion of the ALK gene. While OMHs were positive for smooth muscle actin (SMA), desmin, WT1, podoplanin, and cytokeratins (CAM5.2 and AE1-3), IMT were consistently positive only for SMA (10 cases). ALK-1 displayed cytoplasmic staining in IMT and characteristic paranuclear dot-like staining in OMH.
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Affiliation(s)
- K Ludwig
- Department of Medicine (DIMED), Surgical Pathology & Cytopathology Unit, University-Hospital of Padua, Via A. Gabelli 61, 35121, Padua, Italy
| | - R Alaggio
- Department of Medicine (DIMED), Surgical Pathology & Cytopathology Unit, University-Hospital of Padua, Via A. Gabelli 61, 35121, Padua, Italy.
| | - P Dall'Igna
- Department of Woman and Children's Health, Pediatric Surgery Unit, University-Hospital of Padua, Via Giustiniani 3, 35121, Padua, Italy
| | - E Lazzari
- Pathology Department, "San Bortolo" Hospital, Vicenza, Viale Rodolfi 37, 36100, Vicenza, Italy
| | - E S G d'Amore
- Pathology Department, "San Bortolo" Hospital, Vicenza, Viale Rodolfi 37, 36100, Vicenza, Italy
| | - P M Chou
- Department of Pathology, Northwestern University, 303 East Chicago Avenue, Chicago, IL, 60611, USA
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Förster S, Reimer T, Rimbach S, Louwen F, Volk T, Bürkle H, Benecke C, Carus T, Türler A, Wullstein C, Ludwig K. [CAMIC Recommendations for Surgical Laparoscopy in Non-Obstetric Indications during Pregnancy]. Zentralbl Chir 2015. [PMID: 26205984 DOI: 10.1055/s-0035-1545904] [Citation(s) in RCA: 2] [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: 10/23/2022]
Abstract
In the operative surgical primary care, the laparoscopic surgical technique has firmly established itself in recent years. Meanwhile, in the normal population over 90 % of all cholecystectomies and over 80 % of all appendectomies are performed in a minimally invasive manner. The proven benefits of the laparoscopic surgical technique, compared with conventional open surgery, are a comparatively rapid early postoperative recovery with early resumption of the general physical and occupational activity. As these benefits are equally applicable for necessary interventions during pregnancy, in recent years laparoscopy has become the preferred treatment for non-obstetric indications in the gravid patient. Overall, it can be assumed that such interventions have to be performed in approximately 2 % of all pregnant patients. Numerous studies have proven here that the use of laparoscopic techniques, in particular for the expectant mother, is safe and not associated with an increased risk. On the other hand, the current pregnancy makes necessary an adapted approach to the solution of surgical problems to ensure the protection of the unborn child. On the basis of currently available data situation, recommendations are formulated which can be used as a decision-making support for a variety of clinical situations.
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Affiliation(s)
- S Förster
- Klinik für Allgemein-, Viszeral-, Thorax- und Gefäßchirurgie, Klinikum Südstadt, Rostock, Deutschland
| | - T Reimer
- Universitätsfrauenklinik und Poliklinik am Klinikum Südstadt, Rostock
| | - S Rimbach
- Landeskrankenhaus Feldkirch, Gynäkologie und Geburtshilfe, Feldkirch, Österreich
| | - F Louwen
- Klinik für Frauenheilkunde und Geburtsmedizin, Universitätsklinikum Frankfurt am Main
| | - T Volk
- Klinik für Anästhesiologie, Intensivmedizin und Schmerztherapie, Universitätsklinikum des Saarlandes, Homburg, Saar
| | - H Bürkle
- Klinik für Anästhesiologie und Intensivmedizin, Universitätsklinikum Freiburg
| | - C Benecke
- Klinik für Chirurgie, Universitätsklinikum Schleswig-Holstein, Campus Lübeck
| | - T Carus
- Klinik für Allgemin-, Viszeral- und Unfallchirurgie, Klinikum Bremen Ost
| | - A Türler
- Klinik für Allgemein- und Viszeralchirurgie, Johanniter-Klinikum Bonn
| | - C Wullstein
- Klinik für Allgemein-, Viszeral- und Minimalinvasive Chirurgie, Helios Klinikum Krefeld
| | - K Ludwig
- Klinik für Allgemein-, Viszeral-, Thorax- und Gefäßchirurgie, Klinikum Südstadt, Rostock, Deutschland
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Stehr RC, Kim N, LoGiudice JA, Ludwig K. Fox Den Disease: An Interesting Case Following Delayed Diagnosis. Wounds 2015; 27:170-173. [PMID: 26061492] [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: 06/04/2023]
Abstract
Pyoderma fistulans sinifica, also known as fox den disease, is a rare and poorly understood inflammatory disorder of the skin and subcutaneous tissues. This disorder is often mistaken for other inflammatory skin disorders and treated inappropriately. The authors describe the case of a 53-year-old male who presented to the colorectal surgery service with a longstanding diagnosis of perirectal Crohn's disease. Despite aggressive immunosuppression and numerous surgical procedures, the patient continued to have unrelenting purulent drainage from the skin of his buttocks. Following wide excision of the affected skin and subcutaneous tissues by the colorectal surgeon, the plastic surgery team reconstructed the 30 cm x 55 cm wound using a combination of local flaps and skin grafts. The initial pathology report of the excised specimen confirmed the presence of nonspecific abscesses and inflammation. Upon special request by the plastic surgery team, the sample was resectioned with the specific intent of establishing a diagnosis of fox den disease. The additional slides met the criteria for an unequivocal diagnosis of fox den disease. Immunosuppression was discontinued and the patient healed his wounds without complication. Fox den disease is often overlooked because of the obscurity of the disease and the special histological sectioning needed to establish a diagnosis. In this case, the patient was unnecessarily treated with immunosuppressive drugs for more than 3 decades because of a misdiagnosis. With increased awareness of fox den disease, perhaps its pathophysiology can be better elucidated as more patients are appropriately diagnosed and treated.
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Ludwig K. II Interstitielle Lungenerkrankung – Hätten Sie an eine Berufskrankheit gedacht? – Fallvorstellung mit TED. ROFO-FORTSCHR RONTG 2015. [DOI: 10.1055/s-0035-1550774] [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: 10/23/2022]
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Jüch M, Wertzel H, Riemann T, Ludwig K, Achenbach HJ. [Fractured Rib, Diaphragmatic Rupture and Chest Wall Hernia after Heavy Sneezing]. Zentralbl Chir 2014; 140:337-8. [PMID: 25401369 DOI: 10.1055/s-0034-1383100] [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] [Indexed: 10/24/2022]
Affiliation(s)
- M Jüch
- Klinik für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin und thorakale Onkologie, Lungenklinik Lostau gGmbH, Deutschland
| | - H Wertzel
- Klinik für Thoraxchirurgie, Lungenklinik Lostau gGmbH, Deutschland
| | - T Riemann
- Klinik für Thoraxchirurgie, Lungenklinik Lostau gGmbH, Deutschland
| | - K Ludwig
- Klinik für Radiologie, Lungenklinik Lostau gGmbH, Deutschland
| | - H J Achenbach
- Klinik für Pneumologie, Allergologie, Schlaf- und Beatmungsmedizin und thorakale Onkologie, Lungenklinik Lostau gGmbH, Deutschland
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Ludwig K, Lev M, Gilaie-Dotan S, Voss S, Sterzer P, Polat U, Hesselmann G. The influence of perceptual learning on visual context illusions. J Vis 2014. [DOI: 10.1167/14.10.1162] [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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Olson ME, Appelbee A, Measures L, Cole RA, Lindsay DS, Dubey JP, Thomas NJ, Miller M, Conrad P, Gardner I, Kreuder C, Mazet J, Jessup D, Dodd E, Harris M, Ames J, Worcester K, Paradies D, Grigg M, Fayer R, Lewis EJ, Trout JM, Xiao L, Howard DW, Palmer R, Ludwig K, Tyler SS. Zoonotic protozoa in the marine environment: a threat to aquatic mammals and public health. Vet Parasitol 2014; 125:131-5. [PMID: 24937884 DOI: 10.1016/j.vetpar.2004.05.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
This collection of abstracts provides an account of four presentations at the 19th International Conference of the World Association for the Advancement of Veterinary Parasitology (WAAVP)(held in New Orleans, LA, USA from 10–14 August 2003) in a symposium session on zoonotic protozoan parasites found in the marine environment and chaired by Ronald Fayer and David Lindsay.The focus was on three genera of parasites of veterinary and public health concern—Toxoplasma,Giardia, and Cryptosporidium with emphasis on their epidemiology in the marine environment.
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Stroh C, Groh C, Weiner R, Ludwig K, Wolff S, Kabelitz M, Manger T. Are there gender-specific aspects of gastric banding? Data analysis from the quality assurance study of the surgical treatment of obesity in Germany. Obes Surg 2014; 23:1783-9. [PMID: 23612866 DOI: 10.1007/s11695-013-0964-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Since 1 January 2005, the situation of bariatric surgery has been examined in Germany. All data are registered prospectively in cooperation with the Institute of Quality Assurance in Surgery at the Otto-von-Guericke University Magdeburg. METHODS Data collection on the results of gastric banding procedures was started in 2005, and the data are registered in an online database. Follow-up data were collected once a year. Participation in the quality assurance study is voluntary. RESULTS Since 2005, 3,453 gastric banding procedures have been performed at 88 hospitals. The mean age of patients was 40.7 years, and the mean body mass index (BMI) was 45.2 kg/m2. BMI and comorbidities are significantly higher in male patients. Regarding gender-specific aspects, there are no significant differences in the perioperative complication rates. The amelioration rate of comorbidities in male patients is lower than in female patients. CONCLUSION Gastric banding in Germany is generally performed in patients with a BMI below 45 kg/m2. The perioperative complication rate is low. Data from the nationwide survey of the German Bariatric Surgery Registry show significant differences in preoperative comorbidities and their amelioration between male and female patients. There is a need for further evaluation of gender-specific aspects of gastric banding procedures to optimize patient selection, reduce specific postoperative complications, and achieve long-term effects on weight loss and remission of comorbidities.
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Affiliation(s)
- Christine Stroh
- Department of General-, Abdominal- and Pediatric Surgery, SRH Hospital Gera, Straße des Friedens 122, 07548, Gera, Germany,
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Grimm A, Teschner U, Porzelius C, Zielske J, Ludwig K, Witte O, Brunkhorst F, Axer H. P50: Muscle ultrasound for early assessment of critical illness neuromyopathy in severe sepsis. Clin Neurophysiol 2014. [DOI: 10.1016/s1388-2457(14)50211-8] [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: 11/15/2022]
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Bednarz B, Ludwig K, Fain S. SU-E-QI-09: In Vivo Monitoring of Fluorinated Inhalational Anesthetics Using 19F MRI: A Pilot Study. Med Phys 2014. [DOI: 10.1118/1.4888989] [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: 11/07/2022] Open
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Gribovskaja-Rupp I, Babygirija R, Takahashi T, Ludwig K. Autonomic nerve regulation of colonic peristalsis in Guinea pigs. J Neurogastroenterol Motil 2014; 20:185-96. [PMID: 24847719 PMCID: PMC4015210 DOI: 10.5056/jnm.2014.20.2.185] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Revised: 12/28/2013] [Accepted: 12/29/2013] [Indexed: 12/16/2022] Open
Abstract
Background/Aims Colonic peristalsis is mainly regulated via intrinsic neurons in guinea pigs. However, autonomic regulation of colonic motility is poorly understood. We explored a guinea pig model for the study of extrinsic nerve effects on the distal colon. Methods Guinea pigs were sacrificed, their distal colons isolated, preserving pelvic nerves (PN) and inferior mesenteric ganglia (IMG), and placed in a tissue bath. Fecal pellet propagation was conducted during PN and IMG stimulation at 10 Hz, 0.5 ms and 5 V. Distal colon was connected to a closed circuit system, and colonic motor responses were measured during PN and IMG stimulation. Results PN stimulation increased pellet velocity to 24.6 ± 0.7 mm/sec (n = 20), while IMG stimulation decreased it to 2.0 ± 0.2 mm/sec (n = 12), compared to controls (13.0 ± 0.7 mm/sec, P < 0.01). In closed circuit experiments, PN stimulation increased the intraluminal pressure, which was abolished by atropine (10−6 M) and hexamethonium (10−4 M). PN stimulation reduced the incidence of non-coordinated contractions induced by NG-nitro-L-arginine methyl ester (L-NAME; 10−4 M). IMG stimulation attenuated intraluminal pressure increase, which was partially reversed by alpha-2 adrenoceptor antagonist (yohimbine; 10−6 M). Conclusions PN and IMG input determine speed of pellet progression and peristaltic reflex of the guinea pig distal colon. The stimulatory effects of PN involve nicotinic, muscarinic and nitrergic pathways. The inhibitory effects of IMG stimulation involve alpha-2 adrenoceptors.
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Affiliation(s)
- Irena Gribovskaja-Rupp
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Reji Babygirija
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Toku Takahashi
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
| | - Kirk Ludwig
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA
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Stroh C, Weiner R, Benedix F, Horbach T, Birk D, Luderer D, Ludwig K, Meyer G, Wilhelm B, Wolff S, Knoll C, Manger T. [Bariatric and metabolic surgery in Germany 2012 - results of the quality assurance study on surgery for obesity (data of the German Bariatric Surgery Registry)]. Zentralbl Chir 2014; 139:e1-5. [PMID: 24777601 DOI: 10.1055/s-0033-1360227] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- C Stroh
- Klinik für Allgemein-, Viszeral- und Kinderchirurgie, SRH Wald-Klinikum Gera gGmbH, Deutschland
| | - R Weiner
- Chirurgie, KH Sachsenhausen, Frankfurt am Main, Deutschland
| | - F Benedix
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg, Deutschland
| | - T Horbach
- Chirurgie, Krankenhaus Schwabach, Deutschland
| | - D Birk
- Chirurgie, Klinikum Zweibrücken, Deutschland
| | - D Luderer
- Allgemein-, Viszeral- und Kinderchirurgie, SRH Wald-Klinikum Gera, Deutschland
| | - K Ludwig
- Klinikum Rostock, Südstadt, Deutschland
| | - G Meyer
- Chirurgie, Wolfahrtklinik, München, Deutschland
| | - B Wilhelm
- Chirurgie, Klinikum Nordhausen, Deutschland
| | - S Wolff
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg, Deutschland
| | - C Knoll
- StatConsult Magdeburg, Deutschland
| | - T Manger
- Klinik für Allgemein-, Viszeral- und Kinderchirurgie, SRH Wald-Klinikum Gera gGmbH, Deutschland
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Ludwig K. Sarkoidose-Silikose-Tuberkulose: Wann denkt man an welche Erkrankung? ROFO-FORTSCHR RONTG 2014. [DOI: 10.1055/s-0034-1372699] [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: 10/25/2022]
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Weilnhammer VA, Ludwig K, Sterzer P, Hesselmann G. Revisiting the Lissajous figure as a tool to study bistable perception. Vision Res 2014; 98:107-12. [PMID: 24718018 DOI: 10.1016/j.visres.2014.03.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [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: 11/30/2013] [Revised: 03/25/2014] [Accepted: 03/28/2014] [Indexed: 10/25/2022]
Abstract
During bistable vision perception spontaneously "switches" between two mutually exclusive percepts despite constant sensory input. The endogenous nature of these perceptual transitions has motivated extensive research aimed at the underlying mechanisms, since spontaneous perceptual transitions of bistable stimuli should in principle allow for a dissociation of processes related to sensory stimulation from those related to conscious perception. However, transitions from one conscious percept to another are often not instantaneous, and participants usually report a considerable amount of mixed or unclear percepts. This feature of bistable vision makes it difficult to isolate transition-related visual processes. Here, we revisited an ambiguous depth-from-motion stimulus which was first introduced to experimental psychology more than 80 years ago. This rotating Lissajous figure might prove useful in complementing other bistable stimuli, since its perceptual transitions only occur at critical stimulus configurations and are virtually instantaneous, thus facilitating the construction of a perceptually equivalent replay condition. We found that three parameters of the Lissajous figure - complexity, line width, and rotational speed - differentially modulated its perceptual dominance durations and transition probabilities, thus providing experimenters with a versatile tool to study the perceptual dynamics of bistable vision.
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Affiliation(s)
- V A Weilnhammer
- Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité Universitätsmedizin, 10117 Berlin, Germany
| | - K Ludwig
- Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité Universitätsmedizin, 10117 Berlin, Germany; Department of Psychology, Humboldt-Universität zu Berlin, 10099 Berlin, Germany
| | - P Sterzer
- Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité Universitätsmedizin, 10117 Berlin, Germany
| | - G Hesselmann
- Visual Perception Laboratory, Department of Psychiatry and Psychotherapy, Campus Charité Mitte, Charité Universitätsmedizin, 10117 Berlin, Germany.
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Stroh C, Wilhelm B, Weiner R, Ludwig K, Benedix F, Knoll C, Lippert H, Manger T, Adipositas K. [Current Situation of Antibiotic Prophylaxis in Obesity and Metabolic Surgery - Data Analysis from the Study for Quality Assurance in Operative Treatment of Obesity in Germany]. Zentralbl Chir 2013; 141:45-52. [PMID: 24338802 DOI: 10.1055/s-0033-1350792] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
BACKGROUND Since January 2005, the situation of metabolic and obesity surgery in Germany has been constantly evaluated by the German Bariatric Surgery Registry (GBSR). Data registration is performed using an internet online database with prospective data collection. All registered data were analysed in cooperation with the Institute of Quality Assurance at the Otto-von-Guericke University Magdeburg. METHODS Data collection includes primary and revision/redo-procedures. A main focus of the current study is the analysis of data regarding the perioperative management, in particular, administration of antibiotics. RESULTS Since 2005 a significant increase of primary bariatric procedures has been reported. For evaluation of the antibiotic regimen 12 296 primary operations including 684 balloons (BIB), 2950 gastric bandings (GB), 5115 Roux-en-Y-gastric bypasses (RYGBP), 120 Scopinaro's biliopancreatic diversions (BPD), 164 duodenal switches (DS), 3125 sleeve gastrectomies (SG) and 138 other procedures were analysed. In total 77.3 % of the patients with primary procedures received perioperative antibiotics. Patients without concomitant comorbidities received antibiotics significantly less often compared to those with comorbidities. Wound infection rates were comparable for patients who underwent either gastric banding or sleeve gastrectomy. CONCLUSION Surgery has been accepted step by step as a treatment for morbid obesity and its comorbidities in Germany during the last few years. There is only little experience in the literature regarding antibiotic therapy as well as prophylaxis in bariatric surgery. Based on the results of the current study we recommend rather the selective than the routine use of antibiotics depending on different parameters, e.g., operative time, preoperative BMI and concomitant comorbidities.
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Affiliation(s)
- C Stroh
- Klinik für Allgemein-, Viszeral- und Kinderchirurgie, SRH Wald-Klinikum Gera gGmbH, Deutschland
| | - B Wilhelm
- Abteilung für Allgemeinchirurgie, Hufeland Klinikum Mühlhausen, Deutschland
| | - R Weiner
- Chirurgie, KH Sachsenhausen, Frankfurt am Main, Deutschland
| | - K Ludwig
- Klinik für Chirurgie, Klinikum Südstadt, Rostock, Deutschland
| | - F Benedix
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
| | - C Knoll
- Statconsult Magdeburg, Deutschland
| | - H Lippert
- Klinik für Allgemein-, Viszeral- und Gefäßchirurgie, Universitätsklinikum Magdeburg A. ö. R., Deutschland
| | - T Manger
- Klinik für Allgemein-, Viszeral- und Kinderchirurgie, SRH Wald-Klinikum Gera gGmbH, Deutschland
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Parker KA, Ludwig K, King TM, Brunton DH, Scofield RP, Jamieson IG. Differences in vocalisations, morphology and mtDNA support species status for New Zealand saddlebackPhilesturnusspp. New Zealand Journal of Zoology 2013. [DOI: 10.1080/03014223.2013.846922] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ludwig K, Sterzer P, Kathmann N, Franz V, Hesselmann G. Learning to detect but not to grasp suppressed visual stimuli. Neuropsychologia 2013; 51:2930-8. [DOI: 10.1016/j.neuropsychologia.2013.09.035] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Revised: 07/26/2013] [Accepted: 09/18/2013] [Indexed: 11/25/2022]
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Kwak JM, Babygirija R, Gribovskaja-Rupp I, Takahashi T, Yamato S, Ludwig K. Regional difference in colonic motility response to electrical field stimulation in Guinea pig. J Neurogastroenterol Motil 2013; 19:192-203. [PMID: 23667750 PMCID: PMC3644655 DOI: 10.5056/jnm.2013.19.2.192] [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] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Revised: 02/21/2013] [Accepted: 03/03/2013] [Indexed: 12/16/2022] Open
Abstract
Background/Aims In isolated guinea-pig colon, we investigated regional differences in peristalsis evoked by intrinsic electrical nerve stimulation. Methods Four colonic segments from mid and distal colon of Hartley guinea pigs, were mounted horizontally in an organ bath. Measurement of pellet propulsion time, intraluminal pressure, electrical field stimulation (EFS; 0.5 ms, 60 V, 10 Hz), and response of pharmacological antagonists, were performed to isolated segments of colon to determine the mechanisms underlying peristaltic reflexes evoked by focal electrical nerve stimuli. Results In fecal pellet propulsion study, the velocity of pellet propulsion was significantly faster in the distal colon and decreased gradually to the proximal part of the mid colon. Intraluminal pressure recording studies showed that luminal infusion initiated normal peristaltic contractions (PCs) in 82% trials of the distal colon, compared to that of mid colon. In response to EFS, the incidence of PCs was significantly increased in the distal colon in contrast, the incidence of non-peristaltic contractions (NPCs) was significantly higher in the middle-mid colon, distal-mid colon and distal colon, compared to that of proximal-mid colon. Addition of L-NAME into the bath increased the frequency of NPCs. EFS failed to cause any PCs or NPCs contractions in the presence of hexamethonium, atropine or tetrodotoxin. Conclusions This study has revealed that electrical nerve stimulation of distal colon is the most likely region to elicit a peristaltic wave, compared with the mid or proximal colon. Our findings suggest that EFS-evoked PCs can be modulated by endogenous nitric oxide.
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Affiliation(s)
- Jung Myun Kwak
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, USA. ; Department of Surgery, College of Medicine, Korea University, Seoul, Korea
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Stroh C, Ludwig K, Lippert H, Manger T. Letter to the editor and comments on the article "gastric histopathologies in patients undergoing laparoscopic sleeve gastrectomies" by Salam Al Sabah et al. Obes Surg 2013; 23:577-9. [PMID: 23355294 DOI: 10.1007/s11695-013-0869-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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Kuni B, Schmitt H, Chloridis D, Ludwig K. Clinical and MRI results after microfracture of osteochondral lesions of the talus. Arch Orthop Trauma Surg 2012; 132:1765-71. [PMID: 22899211 DOI: 10.1007/s00402-012-1595-3] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/03/2011] [Indexed: 12/22/2022]
Abstract
PURPOSE Arthroscopic microfracture (AM) of osteochondral lesions of the talus is used to induce intrinsic refilling of the defect and reduce pain. The aim of this retrospective study was to investigate the clinical state after AM and the MRI outcome. METHODS A total of 22 patients [10 women, 12 men, 31 years old (mean, 13-68 range)] treated for osteochondral lesions of the talus by AM were examined 2 years (median) postoperatively and pre- and postoperative MRI results compared. Swelling/effusion, articular constriction, joint pain, and range of motion restriction were documented. Clinical state was evaluated using the AOFAS hindfoot score. MRI was used to assess the size of the defect, presence of bone marrow edema, cysts and effusion, thickness of repair tissue, and integrity of the cartilage. RESULTS In all but six cases, the defect was located at the medial shoulder of the talus. The postoperative AOFAS score at follow-up was 87.5 points (median 36-100 points range). Seven patients were free of pain, 11 had "mild, occasional" pain, 1 "moderate daily", and 3 "severe, almost always present" pain (AOFAS). The defect volume was significantly reduced from 377 mm(3) preoperatively (median, interquartile distance: 417 mm(3)) to 249 mm(3) postoperatively (median, IQD: 336 mm(3), p = 0.019, Wilcoxon). In 7 cases, the defect was completely filled, in 11 partially and in 4 only slightly. CONCLUSION After AM of osteochondral lesions of the talus, 18 of 22 patients had no or mild, occasional pain at 2 years follow-up. On MRI, the lesion volume had been reduced and filling with repair tissue was found.
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Affiliation(s)
- B Kuni
- Department of Orthopedics, Trauma Surgery and Spinal Cord Injury, Clinic for Orthopedics and Trauma Surgery, Heidelberg University Hospital, Schlierbacher Landstr. 200a, 69118 Heidelberg, Germany.
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Stroh C, Köckerling F, Weiner R, Horbach T, Ludwig K, Dressler M, Lange V, Loermann P, Wolff S, Schmidt U, Lippert H, Manger T. Are there gender-specific aspects of sleeve gastrectomy-data analysis from the quality assurance study of surgical treatment of obesity in Germany. Obes Surg 2012; 22:1214-9. [PMID: 22664912 DOI: 10.1007/s11695-012-0681-5] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Since 1 January 2005, the situation of bariatric surgery has been examined in Germany. All data are registered prospectively in cooperation with the Institute of Quality Assurance in Surgery at the Otto-von-Guericke University Magdeburg. Data are registered in an internet online database. Data collection on the results of sleeve gastrectomy was started in 2006. Follow-up data were collected once a year. Participation in the quality assurance study is voluntary. Since 2005, 3,125 sleeve gastrectomies have been performed in 80 hospitals. The number of procedures has increased from 1 in 2005 to 1,564 in 2010. Initially, the leakage rate was 7 % in 2007. The leakage rate dropped to 1.7 in 2010. The mean age of patients was 43.5 years and mean body mass index (BMI) was 52.03 kg/m(2). BMI and comorbidities are significantly higher in male than in female patients. The leakage rate in female patients was, at 1.60 %, significantly lower than in male patients, at 3.28 %. Sleeve gastrectomy is becoming more and more popular in Germany. But the postoperative complication rate is still high. Data from the nationwide survey of bariatric surgery in Germany show significant differences in preoperative comorbidities and complication rates between male and female patients. There is a need for further evaluation of gender-specific aspects to optimize patient selection and reduce specific postoperative complications.
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Schober HC, Kreutzer HJ, Terpe R, Paschke D, Andresen R, Ludwig K, Kundt G. Radiograph-based study of gender-specific vertebral area gain in healthy children and adolescents as a function of age, height, and weight. J Clin Densitom 2012; 15:443-453. [PMID: 22521540 DOI: 10.1016/j.jocd.2012.01.009] [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] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2011] [Revised: 01/13/2012] [Accepted: 01/23/2012] [Indexed: 10/28/2022]
Abstract
This study reports gender-specific vertebral area gain data from children and adolescents. Vertebral area was measured on lateral and anteroposterior thoracic and lumbar spine radiographs from 100 female and 100 male subjects aged 7-28 yr. T9, T11, T12, L1, and L2 X-ray area calculation was based on calculation of the area of the geometric figure of a trapezoid whose 2 nonparallel sides were equal in length, taking account of the waisted shape of the vertebrae. Both the boys and girls of our study population showed statistically significant dependence (p<0.001) of vertebral area gain on chronologic age, height, and weight right through the end of puberty, and especially so up to age 15 yr. However, height and weight were clearly better predictors of lateral and anteroposterior vertebral area gain than was chronologic age. Once vertebral growth is complete by age 18 yr or so, the lateral vertebral areas of the male subjects-regardless of body weight and height-are, on average, 25% larger, and the anteroposterior areas up to 30% larger than those of their female counterparts. After adjusting for chronologic age, height, and weight however we did not find significant differences, between gender, in vertebral area of male and female subjects, neither among children younger than 11 yr nor adolescents ages of 12-14 yr and young adults older than 18 yr.
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Affiliation(s)
- H C Schober
- Department of Internal Medicine, Klinikum Südstadt, Rostock, Germany.
| | - H J Kreutzer
- Institute of Pathology, University of Rostock, Rostock, Germany
| | - R Terpe
- Department of Radiology, University of Rostock, Rostock, Germany
| | - D Paschke
- Department of Internal Medicine, Klinikum Südstadt, Rostock, Germany
| | - R Andresen
- Department of Radiology, Westklinikum, Heide, Germany
| | - K Ludwig
- Department of Surgery, Klinikum Südstadt, Rostock, Germany
| | - G Kundt
- Medical Informatics and Biometry, University of Rostock, Rostock, Germany
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Babygirija R, Cerjak D, Yoshimoto S, Gribovskaja-Rupp I, Bülbül M, Ludwig K, Takahashi T. Affiliative behavior attenuates stress responses of GI tract via up-regulating hypothalamic oxytocin expression. Auton Neurosci 2012; 169:28-33. [DOI: 10.1016/j.autneu.2012.03.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Revised: 02/23/2012] [Accepted: 03/01/2012] [Indexed: 01/05/2023]
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Stroh C, Weiner R, Horbach T, Ludwig K, Dressler M, Lippert H, Wolff S, Büsing M, Schmidt U, Manger T. [New data on quality assurance in bariatric surgery in Germany]. Zentralbl Chir 2012; 138:180-8. [PMID: 22753146 DOI: 10.1055/s-0031-1283889] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
BACKGROUND Since January 1st 2005, the situation of bariatric surgery has been examined in Germany. All data are registered prospectively in cooperation with the Institute of Quality Assurance in Surgery at the Otto-von-Guericke University of Magdeburg. METHODS The voluntary data registration occurs in an internet online data bank. All primary bariatric procedures as well as re- and redo-procedures are documented. Follow-up data were collected once a year. Participation in the quality assurance study is obligatory for certificated centres. RESULTS Since 2005 13,879 bariatric procedures have been performed at 83 hospitals. The number of primary procedures has increased from 596 in 2005 to 11,835 in 2010. Revisional surgery has been performed in 1,438 patients since 2005. Sleeve gastrectomy (SG) is the major procedure with 1,564 operations in 2010. The mean BMI was 48.8 kg/m². The incidence of comorbidities was 84.8%. CONCLUSION Bariatric surgery has become more accepted in Germany. Beside the Roux-en-Y gastric bypass, sleeve gastrectomy is the most frequently performed operation. BMI and incidence of comorbidities are still high in comparison with literature values. Due to the lack of evidence, more randomised studies are necessary to standardise operative techniques and evaluate patient selection criteria. Quality assurance studies support a detailed analysis of these parameters.
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Affiliation(s)
- C Stroh
- SRH Wald-Klinikum Gera gGmbH, Klinik für Allgemein-, Viszeral- und Kinderchirurgie, Gera, Germany.
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Babygirija R, Yoshimoto S, Gribovskaja-Rupp I, Bülbül M, Ludwig K, Takahashi T. Social interaction attenuates stress responses following chronic stress in maternally separated rats. Brain Res 2012; 1469:54-62. [PMID: 22750582 DOI: 10.1016/j.brainres.2012.06.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2012] [Revised: 06/06/2012] [Accepted: 06/08/2012] [Indexed: 12/14/2022]
Abstract
Early life stress has been implicated as a risk factor for functional gastrointestinal (GI) disorders. Hypothalamic oxytocin (OXT) is well known to regulate social interactions and affiliative behaviors. We have shown that maternal separation (MS) induces GI dysmotility and impair hypothalamic OXT expression in response to chronic homotypic stress (CHS). We studied whether social interaction can improve GI dysmotility and OXT expression in MS rats. Male neonatal SD rats were exposed to MS for 180 min from postnatal day (PND)-2 to PND-14. After weaning, 3MS rats were housed together (pure MS). In another group, 1MS rat was housed with 2 control rats (mixed MS). Anxiety-like behaviors were evaluated in elevated plus maze (EPM). Solid gastric emptying (GE) and colonic transit (CT) were measured following CHS loading. Expression of corticotropin releasing factor (CRF) and OXT in the paraventricular nucleus (PVN) were evaluated by real time RT-PCR and immunohistochemistry. Pure MS rats demonstrated increased anxiety-like behaviors, which were significantly reduced in mixed MS rats. Delayed GE (31.5±2.8%, n=6) and accelerated CT [Geometric center (GC) =8.9±0.8, n=6] observed in pure MS rats were restored in mixed MS rats (GE=67.8±3.8%, GC=6.7±1.2, n=6, P<0.05) following CHS. OXT mRNA expression was upregulated, while CRF mRNA expression was downregulated in mixed MS rats, compared to pure MS rats. The number of OXT-immunoreactive cells was significantly increased following CHS at the PVN in mixed MS rats. Our study may contribute to the treatment strategies for GI motility disorders associated with early life stress.
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Affiliation(s)
- Reji Babygirija
- Department of Surgery, Medical College of Wisconsin and Zablocki VA Medical Center, Milwaukee, WI, United States
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Yoshimoto S, Babygirija R, Dobner A, Ludwig K, Takahashi T. Anti-stress effects of transcutaneous electrical nerve stimulation (TENS) on colonic motility in rats. Dig Dis Sci 2012; 57:1213-21. [PMID: 22258717 DOI: 10.1007/s10620-012-2040-8] [Citation(s) in RCA: 24] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2011] [Accepted: 01/04/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Disorders of colonic motility may contribute to symptoms in patients with irritable bowel syndrome (IBS), and stress is widely believed to play a major role in developing IBS. Stress increases corticotropin releasing factor (CRF) of the hypothalamus, resulting in acceleration of colonic transit in rodents. In contrast, hypothalamic oxytocin (OXT) has an anti-stress effect via inhibiting CRF expression and hypothalamic-pituitary-adrenal axis activity. Although transcutaneous electrical nerve stimulation (TENS) and acupuncture have been shown to have anti-stress effects, the mechanism of the beneficial effects remains unknown. AIMS We tested the hypothesis that TENS upregulates hypothalamic OXT expression resulting in reduced CRF expression and restoration of colonic dysmotility in response to chronic stress. METHODS Male SD rats received different types of stressors for seven consecutive days (chronic heterotypic stress). TENS was applied to the bilateral hind limbs every other day before stress loading. Another group of rats did not receive TENS treatment. RESULTS TENS significantly attenuated accelerated colonic transit induced by chronic heterotypic stress, which was antagonized by a central injection of an OXT antagonist. Immunohistochemical study showed that TENS increased OXT expression and decreased CRF expression at the paraventricular nucleus (PVN) following chronic heterotypic stress. CONCLUSIONS It is suggested that TENS upregulates hypothalamic OXT expression which acts as an anti-stressor agent and mediates restored colonic dysmotility following chronic stress. TENS may be useful to treat gastrointestinal symptoms associated with stress.
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Affiliation(s)
- Sazu Yoshimoto
- Department of Surgery, Zablocki VA Medical Center, Medical College of Wisconsin, 5000 West National Avenue, Milwaukee, WI 53295, USA
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Gribovskaja-Rupp I, Takahashi T, Ridolfi T, Kosinski L, Ludwig K. Upregulation of mucosal 5-HT3 receptors is involved in restoration of colonic transit after pelvic nerve transection. Neurogastroenterol Motil 2012; 24:472-8, e218. [PMID: 22304456 DOI: 10.1111/j.1365-2982.2012.01890.x] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
BACKGROUND Colonic dysfunction occurs after pelvic autonomic nerve damage. The enteric nervous system can compensate. We investigated the role of mucosal serotonin receptors, 5-HT(3) and 5-HT(4) , in the colonic motility restoration over 2 weeks after parasympathetic pelvic nerve transection in a rat model. METHODS Male Sprague-Dawley rats underwent pelvic nerve transection or sham operation. Colonic transit was expressed as the geometric center of (51) Cr distribution. Mucosal 5-HT(3) and 5-HT(4) receptor expression was evaluated by Western blot. Intraluminal pressure increase was measured after 5-HT(3) (ondansetron) or 5-HT(4) receptor antagonist (GR125487) administration in vitro in sham and denervated distal colons. KEY RESULTS At 2 weeks, colonic transit in the denervated group was 30% slower compared to the sham group (P < 0.01). At 1 and 2 weeks, 5-HT(3) receptor expression was increased two-fold in the denervated group, compared to shams (P < 0.05). A three-fold smaller dose of ondansetron was required in denervated tissues to inhibit intraluminal pressure rise than in sham colons (P < 0.01). There was no difference in the expression of 5-HT(4) receptor or the response to GR125487 in denervated vs sham colons. CONCLUSIONS & INFERENCES Colonic motility was restored to approximately 70% normal over 1 week without further improvement at 2 weeks. Enteric nervous system compensated by upregulating mucosal 5-HT(3,) but not 5-HT(4,) receptors.
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Affiliation(s)
- I Gribovskaja-Rupp
- Department of Surgery, Medical College of Wisconsin, Clement J Zablocki VA Medical Center, Milwaukee, WI, USA
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