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Heratizadeh A, Mempel M, von Kiedrowski R, Hagl S, Mosch T, Fritz B, Werfel T. Checklist identification of candidates for systemic therapy in adult patients with atopic dermatitis in Germany: A multicentre study. J Eur Acad Dermatol Venereol 2024; 38:157-166. [PMID: 37611262 DOI: 10.1111/jdv.19465] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/02/2023] [Indexed: 08/25/2023]
Abstract
BACKGROUND The German S2k guideline is the first to include a checklist that captures atopic dermatitis (AD) signs and symptoms as well as the lack of treatment response to identify patients eligible for systemic therapy. OBJECTIVES Identifying candidates for a start/switch of systemic therapy in adult AD patients in Germany by applying the S2k guideline's checklist. METHODS In this German multicentre, cross-sectional, non-interventional study (German Clinical Trials Register number: DRKS00023296), adult patients with mild to severe AD were enrolled at dermatological outpatient clinics and offices between April and October 2021. Demographics, clinical characteristics and quality of life were collected using questionnaires during one single visit. Eligibility for a start/switch of systemic AD therapy was evaluated according to the criteria of the German S2k guideline's checklist. RESULTS Atopic dermatitis patients (575) were included in the analysis. One hundred and sixty-four patients (28.5%) received systemic (SYS) AD therapy and 411 patients (71.5%) did not (TOP). Of the TOP therapy patients, 38.7% were eligible to start systemic AD therapy, and about half of those (49.1%), were scheduled to start systemic AD therapy. The most frequent reason deciding against a systemic therapy was the patient's wish. Although 29.3% of SYS patients were eligible for a switch according to the criteria of the German S2k guideline's checklist, the majority (81.3%) did not switch AD therapy. CONCLUSIONS This is the first study on the implementation of the German S2k guideline's checklist in everyday care of AD patients in Germany. More than one-third of the TOP patients were identified as eligible for systemic treatment. By applying the guideline's checklist criteria, another one-third of SYS patients may have benefited from a change of current systemic therapy. The use of the German S2k guideline's checklist in routine care represents an important tool to ensure effective patient care and identify inadequately treated patients.
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Affiliation(s)
- A Heratizadeh
- Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
| | - M Mempel
- Hautarztpraxis Elmshorn, Elmshorn, Germany
| | - R von Kiedrowski
- Company for Medical Study & Service Selters GmbH (CMS), Selters, Germany
| | - S Hagl
- formerly AbbVie Deutschland GmbH & Co. KG, Wiesbaden, Germany
| | - T Mosch
- AbbVie Deutschland GmbH & Co. KG, Wiesbaden, Germany
| | - B Fritz
- AbbVie Deutschland GmbH & Co. KG, Wiesbaden, Germany
| | - T Werfel
- Department of Dermatology and Allergy, Hannover Medical School, Hannover, Germany
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Baerwald C, Stemmler E, Gnuechtel S, Jeromin K, Holland C, Fritz B, Adolf D, Taylor PC, Baron R. POS0598 PERSISTING PAIN IN RHEUMATOID ARTHRITIS: DO WE NEED TO RECONSIDER OUR IDEA OF PAIN ALLEVIATION DESPITE ANTI-INFLAMMATORY TREATMENT? Ann Rheum Dis 2022. [DOI: 10.1136/annrheumdis-2022-eular.2152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BackgroundPain significantly impacts life of patients with rheumatoid arthritis (RA) (1). Besides articular pain due to systemic inflammation, neuropathic pain (NeP) represents another challenge that can pose a considerable burden on the life of patients (2).ObjectivesTo investigate persisting pain in RA patients and to analyse NeP along with patient-reported outcomes (PROs).MethodsPAIN-CONTROL is a prospective, non-interventional study in rheumatology centres in Germany. Inclusion criteria were fulfilment of the 2010 ACR/EULAR RA classification criteria, disease duration ≤ 8 yrs, DAS28 > 3.2, SJC > 3, CRP normal or above reference range, and pain rating ≥ 50 (0-100 VAS). Eligible subjects had to be scheduled for escalation of anti-inflammatory treatment according to national guidelines. At wk 24 subjects were allocated to three subgroups given DAS28-CRP change and VAS pain: i) reference group: VAS pain < 50 with either DAS28 improvement > 1.2 or DAS28 ≤ 3.2, ii) non-responders: DAS28 improvement ≤ 1.2 and DAS28 > 3.2 with or without pain alleviation, iii) persisting pain: VAS pain ≥ 50 with either DAS28 improvement > 1.2 or DAS28 ≤ 3.2. For groups 1 and 2 end of study was at week 24, patients with persisting pain continued until wk 48. Patients were assessed for NeP using a score of ≥ 19 in the painDETECT questionnaire (PD-Q) (3). Pain-related PROs, i.e. the Rheumatoid Arthritis Impact of Disease Questionnaire (RAID) and the Patient Health Questionnaire (PHQ-9), were analysed along with demographic background information (1,4). Descriptive results are presented as mean (SD) or mean (SD) | Nvalid, as well as n (%) or n (%) | Nvalid, respectively.Results567 subjects were analysed with the following distribution: Reference group 337 (59.4%), non-responders 102 (18.0%), and persisting pain 128 (22.6%), of which 115 patients were available at wk 48. Subgroups showed similar demographic baseline characteristics but differed in PROs (Table 1). Until wk 24, proportion of patients with NeP indication decreased in the reference group (-19.8%) and slightly in non-responders (-6.0%) and persisting pain group (-9.5%). Non-responders showed the highest NeP proportion at wk 24 (35.0%) (Table 1). Of 115 patients with persisting pain at wk 24, 47 (40.9%) tested NeP negative at wk 48, 21 (18.3%) tested unclear, 28 (24.3%) were missing and 19 (16.5%) tested positive. Of the latter 9 patients (47.4%) still had persisting pain at week 48, while this was the case for 14 patients (29.8%) in the former group. 49 (42.6%) of 115 patients with severe persisting pain at wk 24 reported pain alleviation at wk 48 and fulfillment of reference group criteria. RAID and PHQ-9 scores improved in the reference group but only slightly in the other two subgroups.Table 1.Demographic background and PROsCharacteristicReference group(N = 337)Non-responders(N = 102)Persisting pain(N = 128)Gender (f/m)233 (69.1%) /65 (63.7%) /87 (68.0%) /104 (30.9%)37 (36.3%)41 (32.0%)Age57.1 (13.2) | 33759.9 (12.0) | 10257.1 (13.0) | 128Disease duration (yrs)2.5 (2.6) | 3372.7 (2.8) | 1022.5 (2.5) | 128PD-Q (≥ 19) (Bl)82 (28.6%) | 28732 (41.0%) | 7840 (36.0%) | 111PD-Q (≥ 19) (wk 24)21 (8.8%) | 23928 (35.0%) | 8027 (26.5%) | 102PD-Q (Bl)14.0 (6.8) | 28715.5 (7.1) | 7815.5 (6.5) | 111PD-Q (wk 24)8.8 (5.8) | 23914.8 (6.7) | 8013.8 (7.2) | 102RAID (Bl)5.8 (2.0) | 3326.0 (1.9) | 1006.6 (1.7) | 125RAID (wk 24)2.4 (1.8) | 3215.4 (1.9) | 975.1 (1.9) | 123PHQ-9 (Bl)7.3 (5.1) | 3288.4 (5.4) | 987.9 (5.1) | 123PHQ-9 (wk 24)3.8 (3.5) | 3187.3 (4.5) | 956.6 (4.5) | 122ConclusionNeP is common among RA non-responders to anti-inflammatory treatment and in patients with persisting pain, meriting a routine NeP screening to more adequately address persisting pain in these patients. However, even late improvements (after 24 wks) regarding persisting pain seem likely during anti-inflammatory treatment.References[1]Gossec L, Ann Rheum Dis. 2011 Jun;70(6):935–42.[2]Noda K, Mod Rheumatol. 2020 Sep;30(5):828–34.[3]Freynhagen R, Curr Med Res Opin. 2006 Oct;22(10):1911–20.[4]Kroenke K, J Gen Intern Med. 2001 Sep;16(9):606–13.AcknowledgementsStatistical analysis was provided under lead of Dr. Daniela Adolf of StatConsult GmbH, which was funded by AbbVie.Medical writing support was provided by Dr. Matthias Englbrecht of Statscoach, which was funded by AbbVie.Disclosure of InterestsChristoph Baerwald Speakers bureau: Prof. Christoph G. Baerwald has served as consultant to AbbVie and has received research funding and speaker fees from AbbVie., Consultant of: Prof. Christoph G. Baerwald has served as consultant to AbbVie and has received research funding and speaker fees from AbbVie., Grant/research support from: Prof. Christoph G. Baerwald has served as consultant to AbbVie and has received research funding and speaker fees from AbbVie., Edgar Stemmler Shareholder of: Dr. Edgar Stemmler is employee of AbbVie and may own AbbVie stock., Employee of: Dr. Edgar Stemmler is employee of AbbVie and may own AbbVie stock., Sixten Gnuechtel Shareholder of: Dr. Sixten Gnüchtel is employee of AbbVie and may own AbbVie stock., Employee of: Dr. Sixten Gnüchtel is employee of AbbVie and may own AbbVie stock., Katharina Jeromin Shareholder of: Dr. Katharina Jeromin is employee of AbbVie and may own AbbVie stock, Employee of: Dr. Katharina Jeromin is employee of AbbVie and may own AbbVie stock, Carsten Holland Shareholder of: Dr. Carsten Holland is employee of AbbVie and may own AbbVie stock, Employee of: Dr. Carsten Holland is employee of AbbVie and may own AbbVie stock, björn fritz Shareholder of: Dr. Björn Fritz is employee of AbbVie and may own AbbVie stock., Employee of: Dr. Björn Fritz is employee of AbbVie and may own AbbVie stock., Daniela Adolf Consultant of: Dr. Daniela Adolf is an employee of StatConsult GmbH.Statistical analysis was provided under lead of Dr. Daniela Adolf of StatConsult GmbH, which was funded by AbbVie, Peter C. Taylor Speakers bureau: Peter C. Taylor has served as consultant to AbbVie and has received speaker fees from AbbVie, Consultant of: Peter C. Taylor has served as consultant to AbbVie and has received speaker fees from AbbVie, Ralf Baron Speakers bureau: Prof. Ralf Baron has served as consultant to AbbVie and has received speaker fees from AbbVie., Consultant of: Prof. Ralf Baron has served as consultant to AbbVie and has received speaker fees from AbbVie.
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Fritz B, Fritz J, Fucentese SF, Pfirrmann CWA, Sutter R. Three-dimensional analysis for quantification of knee joint space width with weight-bearing CT: comparison with non-weight-bearing CT and weight-bearing radiography. Osteoarthritis Cartilage 2022; 30:671-680. [PMID: 34883245 DOI: 10.1016/j.joca.2021.11.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [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: 01/01/2021] [Revised: 10/05/2021] [Accepted: 11/01/2021] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To compare computer-based 3D-analysis for quantification of the femorotibial joint space width (JSW) using weight-bearing cone beam CT (WB-CT), non-weight-bearing multi-detector CT (NWB-CT), and weight-bearing conventional radiographs (WB-XR). DESIGN Twenty-six participants prospectively underwent NWB-CT, WB-CT, and WB-XR of the knee. For WB-CT and NWB-CT, the average and minimal JSW was quantified by 3D-analysis of the minimal distance of any point of the subchondral tibial bone surface and the femur. Associations with mechanical leg axes and osteoarthritis were evaluated. Minimal JSW of WB-CT was further compared to WB-XR. Two-tailed p-values of <0.05 were considered significant. RESULTS Significant differences existed of the average medial and lateral JSW between WB-CT and NWB-CT (medial: 4.7 vs 5.1 mm [P = 0.028], lateral: 6.3 vs 6.8 mm [P = 0.008]). The minimal JSW on WB-XR (medial:3.1 mm, lateral:5.8 mm) were significantly wider compared to WB-CT and NWB-CT (both medial:1.8 mm, lateral:2.9 mm, all p < 0.001), but not significantly different between WB-CT and NWB-CT (all p ≥ 0.869). Significant differences between WB-CT and NWB-CT existed in participants with varus knee alignment for the average and the minimal medial JSW (p = 0.004 and p = 0.011) and for participants with valgus alignment for the average lateral JSW (p = 0.013). On WB-CT, 25% of the femorotibial compartments showed bone-on-bone apposition, which was significantly higher when compared to NWB-CT (10%,P = 0.008) and WB-XR (8%,P = 0.012). CONCLUSION Combining WB-CT with 3D-based assessment allows detailed quantification of the femorotibial joint space and the effect of knee alignment on JSW. WB-CT demonstrates significantly more bone-on-bone appositions, which are underestimated or even undetectable on NWB-CT and WB-XR.
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Affiliation(s)
- B Fritz
- Department of Radiology, Balgrist University Hospital, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
| | - J Fritz
- New York University Grossman School of Medicine, New York University, New York, USA.
| | - S F Fucentese
- Department of Orthopedic Surgery, Balgrist University Hospital, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
| | - C W A Pfirrmann
- Department of Radiology, Balgrist University Hospital, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
| | - R Sutter
- Department of Radiology, Balgrist University Hospital, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland.
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Stienstra M, Edelaar MJA, Fritz B, Reneman MF. Measurement Properties of the Work Ability Score in Sick-Listed Workers with Chronic Musculoskeletal Pain. J Occup Rehabil 2022; 32:103-113. [PMID: 34037926 DOI: 10.1007/s10926-021-09982-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 04/26/2021] [Indexed: 05/26/2023]
Abstract
Purpose Chronic musculoskeletal pain can have a major impact on ability to work. The work ability score is a commonly used single-item question to assess work ability but has not been fully validated yet. The aim of the present study was to evaluate test-retest reliability, agreement, construct validity, and responsiveness of the work ability score among sick-listed workers with chronic musculoskeletal pain. Methods Data of sick-listed workers with chronic musculoskeletal pain was routinely collected at seven rehabilitation centres in the Netherlands. Assessments included a set of questionnaires, administered at admission and discharge from a fifteen-week vocational rehabilitation program. Test-retest reliability was determined with the intraclass correlation coefficient. For agreement, the standard error of measurement and smallest detectable changes were calculated. Construct validity was assessed by testing hypotheses regarding Spearman rank correlation coefficient. Area under the curve obtained from the receiver operating characteristic curve and minimal clinically important change were determined for the total sample and work ability score baseline tertile groups to assess responsiveness. Results In total, 34 workers were analyzed for reliability and agreement, 1291 workers for construct validity, and 590 responded to the responsiveness questionnaire. Reliability reached an intraclass correlation coefficient of 0.89; 95% CI 0.77-0.94, a standard error of measurement of 0.69 points, and the smallest detectable change of 1.92 points. For construct validity, six of the seven predefined hypotheses were not refuted. The area under the curve was 0.76 (95% CI 0.71-0.81) allowing for discrimination between stable and improved workers, with a minimal clinically important change of 2.0 points for the total sample. Conclusion The work ability score showed good measurement properties among sick-listed workers with chronic musculoskeletal pain.
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Affiliation(s)
- M Stienstra
- Department of Research and Development, and Institute of Vocational Assessment and Education, Heliomare Rehabilitation Center, Relweg 51, 1949, EC Wijk aan Zee, The Netherlands.
| | - M J A Edelaar
- Department of Research and Development, and Institute of Vocational Assessment and Education, Heliomare Rehabilitation Center, Relweg 51, 1949, EC Wijk aan Zee, The Netherlands
| | - B Fritz
- Department of Research and Development, and Institute of Vocational Assessment and Education, Heliomare Rehabilitation Center, Relweg 51, 1949, EC Wijk aan Zee, The Netherlands
| | - M F Reneman
- Department of Rehabilitation Medicine, Center for Rehabilitation, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Barnaure I, Galley J, Fritz B, Sutter R. Magnetic resonance imaging in the evaluation of cervical foraminal stenosis: comparison of 3D T2 SPACE with sagittal oblique 2D T2 TSE. Skeletal Radiol 2022; 51:1453-1462. [PMID: 35006279 PMCID: PMC9098590 DOI: 10.1007/s00256-022-03988-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/16/2021] [Revised: 12/30/2021] [Accepted: 01/02/2022] [Indexed: 02/02/2023]
Abstract
OBJECTIVE The oblique orientation of the cervical neural foramina challenges the implementation of a short MRI protocol with concurrent excellent visualization of the spine. While sagittal oblique T2-weighted sequences permit good evaluation of the cervical neuroforamina, all segments may not be equally well depicted on a single sequence and conspicuity of foraminal stenosis may be limited. 3D T2-weighted sequences can be reformatted in arbitrary planes, including the sagittal oblique. We set out to compare 3D T2w SPACE sequences with sagittal oblique reformations and sagittal oblique 2D T2w TSE sequences for the evaluation of cervical foraminal visibility and stenosis. MATERIALS AND METHODS Sixty consecutive patients who underwent MRI of the cervical spine with sagittal oblique 2D T2w TSE and 3D T2w SPACE sequences were included. Image homogeneity of the sequences was evaluated. Imaging sets were assessed for structure visibility and foraminal stenosis by two independent readers. Results of the sequences were compared by Wilcoxon matched-pairs tests. Interreader agreement was evaluated by weighted κ. RESULTS Visibility of most structures was rated good to excellent on both sequences (mean visibility scores ≥ 4.5 of 5), though neuroforaminal contents were better seen on sagittal oblique T2w TSE (mean scores 4.1-4.6 vs. 3.1-4.1 on 3D T2w SPACE, p < 0.01). Stenosis grades were comparable between sequences (mean 1.1-2.6 of 4), with slightly higher values for 3D T2w SPACE at some levels (difference ≤ 0.3 points). CONCLUSION 3D T2w SPACE is comparable with sagittal oblique 2D T2w TSE in the evaluation of cervical neural foramina.
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Affiliation(s)
- I Barnaure
- Department of Radiology, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland.
| | - J Galley
- Department of Radiology, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - B Fritz
- Department of Radiology, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
| | - R Sutter
- Department of Radiology, Balgrist University Hospital, Forchstrasse 340, 8008, Zurich, Switzerland
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Johnson C, Milbrath B, Lowrey J, Alexander T, Fast J, Fritz B, Kirkham R, Mace E, Mayer M, McIntyre J, Olsen K. Measurements of Argon-39 from locations near historic underground nuclear explosions. J Environ Radioact 2021; 237:106715. [PMID: 34371240 DOI: 10.1016/j.jenvrad.2021.106715] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 07/02/2021] [Accepted: 08/03/2021] [Indexed: 06/13/2023]
Abstract
Measurement of radioactive gas seepage from an underground nuclear explosion is one of the primary methods to confirm whether an event was nuclear in nature. Radioactive noble gas indicators that are commonly targeted by such measurements (e.g. 133Xe, 37Ar) have half-lives of 35 days or less. Argon-39, an activation product similar to 37Ar, is produced by the interaction between neutrons and potassium in the surrounding geology and has a half-life of 269 years. Measurements taken at three sites near three historic underground nuclear test locations at the Nevada National Security Site have all shown highly elevated levels of 39Ar in soil gas decades after the test events. Elevated levels of 39Ar were also detected in atmospheric air collected near two of these sites, and outside the entrance of the one tunnel site. These measurements demonstrate that 39Ar has the potential to be a long-term signature of an underground nuclear event which can be reliably detected at the surface or in the shallow subsurface. This radionuclide detection of an underground nuclear event decades after the event takes place is in contrast to the commonly held assumption that detecting underground nuclear events via radionuclides at the surface needs to be done in a matter of months. Depending upon what further studies show about the robustness of this signature in a variety of geological settings, it may in fact be easy to detect underground nuclear events at the surface for a very long time post-detonation.
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Affiliation(s)
- C Johnson
- Pacific Northwest National Laboratory, USA.
| | - B Milbrath
- Pacific Northwest National Laboratory, USA
| | - J Lowrey
- Pacific Northwest National Laboratory, USA
| | | | - J Fast
- Pacific Northwest National Laboratory, USA
| | - B Fritz
- Pacific Northwest National Laboratory, USA
| | - R Kirkham
- Pacific Northwest National Laboratory, USA
| | - E Mace
- Pacific Northwest National Laboratory, USA
| | - M Mayer
- Pacific Northwest National Laboratory, USA
| | - J McIntyre
- Pacific Northwest National Laboratory, USA
| | - K Olsen
- Pacific Northwest National Laboratory, USA
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Flury A, Weigelt L, Camenzind RS, Fritz B, Hasler J, Baumgaertner B, Helmy N, Fucentese SF. Total and unicondylar knee arthroplasty are equivalent treatment options in end-stage spontaneous osteonecrosis of the knee, and the size of the lesion has no influence on the results. Knee Surg Sports Traumatol Arthrosc 2021; 29:3254-3261. [PMID: 32607816 DOI: 10.1007/s00167-020-06132-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 05/26/2020] [Accepted: 06/26/2020] [Indexed: 11/29/2022]
Abstract
PURPOSE The purpose of the present study was to compare total (TKA) and unicondylar (UKA) knee arthroplasty for spontaneous osteonecrosis of the knee (SONK), and to investigate potential correlations to radiographic parameters. METHODS All consecutive patients with a magnetic resonance imaging (MRI) proven SONK treated with either TKA or UKA between 2002 and 2018 were analysed. The primary outcomes were postoperative complications and failure rates. Functional assessment included Knee Society Score (KSS), WOMAC Score, and range of motion. A novel three-dimensional measurement method was established to determine the size of the osteonecrotic lesion. All outcome parameters were correlated to the size of the necrotic lesion using Spearman's rank correlation. RESULTS The two treatment groups (34 TKAs, 37 UKAs) did not differ regarding age, body mass index, and ratio of the volume of the necrotic lesion to the volume of the femoral condyle (n.s.). At a mean follow-up of 6.6 years, patients with UKA had better functional outcomes compared to patients with a TKA (WOMAC Score 1.0 vs. 1.6, p = 0.04; KSS pain 86 vs. 83, n.s), with a similar complication rate. No correlation was found between necrotic lesion size and failure rate (n.s.). CONCLUSION UKA is a valuable treatment option for SONK leading to good functional results and a low failure rate. In case of a surgeon's concern regarding implant anchorage, TKA represents an equivalent solution. The MR-tomographic size of the osteonecrotic lesions seems to have no influence on the results. LEVEL OF EVIDENCE III.
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Affiliation(s)
- A Flury
- Orthopaedic Department, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland. .,Department of Orthopaedics and Traumatology, Buergerspital Solothurn, Schoengruenstrasse 42, 4500, Solothurn, Switzerland.
| | - L Weigelt
- Orthopaedic Department, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - R S Camenzind
- Orthopaedic Department, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland.,Department of Orthopaedics and Traumatology, Buergerspital Solothurn, Schoengruenstrasse 42, 4500, Solothurn, Switzerland
| | - B Fritz
- Department of Radiology, Balgrist University Hospital, University of Zurich, Zurich, Switzerland
| | - J Hasler
- Orthopaedic Department, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland.,Department of Orthopaedics and Traumatology, Buergerspital Solothurn, Schoengruenstrasse 42, 4500, Solothurn, Switzerland
| | - B Baumgaertner
- Department of Orthopaedics and Traumatology, Buergerspital Solothurn, Schoengruenstrasse 42, 4500, Solothurn, Switzerland
| | - N Helmy
- Department of Orthopaedics and Traumatology, Buergerspital Solothurn, Schoengruenstrasse 42, 4500, Solothurn, Switzerland
| | - S F Fucentese
- Orthopaedic Department, Balgrist University Hospital, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
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Flury A, Hoch A, Andronic O, Fritz B, Imhoff FB, Fucentese SF. Increased femoral antetorsion correlates with higher degrees of lateral retropatellar cartilage degeneration, further accentuated in genu valgum. Knee Surg Sports Traumatol Arthrosc 2021; 29:1760-1768. [PMID: 32785758 DOI: 10.1007/s00167-020-06223-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [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: 06/08/2020] [Accepted: 08/06/2020] [Indexed: 01/17/2023]
Abstract
PURPOSE The role of increased femoral antetorsion (femAT) as a contributor to patellofemoral (PF) osteoarthritis (OA) is unknown. The purpose of this study was to investigate whether increased femAT was associated with advanced cartilage degeneration in the lateral PF joint. METHODS Patients who underwent complete radiographic workup for surgical intervention due to OA in any knee joint compartment were included. Cartilage morphology according to the International Cartilage Repair Society (ICRS) cartilage lesion classification system in the PF joint, femoral and tibial torsion, frontal leg axis, and tibial tuberosity-trochlear groove (TT-TG) distance were assessed. Increased femAT was defined as > 20° according to previous reports. RESULTS A total of 144 patients were included. Ninety-seven patients had a femAT of < 20° and 45 of > 20°. A significant odds ratio (OR) was found for lateral retropatellar (OR 3.5; p = 0.02) ICRS grade 3 and 4 cartilage degeneration and increased femAT ≥ 20°. In the medial PF compartment, increased femAT had an inverse effect (OR 0.16; p = 0.01). No significant ORs were found for TT-TG distance, tibial torsion, or leg axis. The lateral retropatellar ICRS grade showed a linear correlation to increased femAT values. In valgus knees, isolated lateral PF OA had an even more pronounced correlation to increased femAT (p = 0.004). CONCLUSION Increased femAT showed higher grades of lateral retropatellar cartilage degeneration, which was even more pronounced in valgus knees. LEVEL OF EVIDENCE Cohort study: Level III.
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Affiliation(s)
- A Flury
- Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, Zurich, 8008, Switzerland
| | - A Hoch
- Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, Zurich, 8008, Switzerland
| | - O Andronic
- Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, Zurich, 8008, Switzerland
| | - B Fritz
- Balgrist University Hospital, Department of Radiology, University of Zurich, Forchstrasse 340, 8008, Zurich, Switzerland
| | - F B Imhoff
- Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, Zurich, 8008, Switzerland.
| | - S F Fucentese
- Balgrist University Hospital, Orthopaedic Department, University of Zurich, Forchstrasse 340, Zurich, 8008, Switzerland
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Noguera C, Fritz B, Clément A, Lemarchand D. Modelling the precipitation of nanoparticles in a closed medium in the presence of seeds: Application to amorphous silica synthesis. J Colloid Interface Sci 2021; 601:843-852. [PMID: 34118775 DOI: 10.1016/j.jcis.2021.03.176] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Revised: 03/11/2021] [Accepted: 03/31/2021] [Indexed: 10/21/2022]
Abstract
Seed-mediated methods are widely used in industrial or academic laboratories for the synthesis of nanoparticles of controlled shape and size. In the natural medium, precipitation of secondary minerals also often take place on seeds. In this context, we have devised a formalism which accounts for the competition between seed growth and nucleation and growth of secondary particles in an initially over-saturated aqueous solution. Based on the classical nucleation theory, it involves a size-dependent growth law which accounts for Ostwald ripening effects, unlike most water-rock interaction codes. We find that, in such closed system, seed growth and nucleation/growth of secondary particles are strongly coupled. In the multi-dimensional parameter space, regions where one or the other process prevails are well-separated by a rather abrupt transition. In general, the value of the initial seed total surface area is insufficient to fully orientate the synthesis. Relying on this approach, we propose an alternative interpretation of recent experimental results on amorphous silica nanoparticle synthesis. Besides fundamental understanding of the kinetics of precipitation, the interest of the present approach is to serve as a guideline to experimentalists or industrialists working in seed-mediated syntheses and warn on the undesired formation of secondary particles when monodispersed distributions of nano- or micro-particles are searched.
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Affiliation(s)
- C Noguera
- CNRS-Sorbonne Université, UMR 7588, INSP, 4 Place Jussieu, F-75005 Paris, France.
| | - B Fritz
- Université de Strasbourg/EOST, CNRS, Institut Terre et Environnement Strasbourg, 5 rue René Descartes, Strasbourg Cedex F-67084, France
| | - A Clément
- Université de Strasbourg/EOST, CNRS, Institut Terre et Environnement Strasbourg, 5 rue René Descartes, Strasbourg Cedex F-67084, France
| | - D Lemarchand
- Université de Strasbourg/EOST, CNRS, Institut Terre et Environnement Strasbourg, 5 rue René Descartes, Strasbourg Cedex F-67084, France
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Mostafa A, Lucyshyn T, Holzer C, Flachberger H, Oefner W, Riess G, Fritz B. Influence of filler treatment on the behavior of blast furnace slag filled polypropylene compounds. J Appl Polym Sci 2018. [DOI: 10.1002/app.46535] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- A. Mostafa
- Polymer Competence Center Leoben GmbH (PCCL); Leoben Austria
| | - T. Lucyshyn
- Chair of Polymer Processing, Montanuniversitaet Leoben; Leoben Austria
| | - C. Holzer
- Chair of Polymer Processing, Montanuniversitaet Leoben; Leoben Austria
| | - H. Flachberger
- Chair of Mineral Processing, Montanuniversitaet Leoben; Leoben Austria
| | - W. Oefner
- Chair of Mineral Processing, Montanuniversitaet Leoben; Leoben Austria
| | - G. Riess
- Chair of Chemistry of Polymeric Materials, Montanuniversitaet Leoben; Leoben Austria
| | - B. Fritz
- Voestalpine Stahl GmbH; Linz Austria
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Mostafa A, Pacher G, Lucyshyn T, Holzer C, Krischey E, Flachberger H, Fritz B, Laske S. Influence of Melt Compounding on Blast Furnace Slag Filled PP Compounds: A Comparative Study. INT POLYM PROC 2017. [DOI: 10.3139/217.3365] [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: 11/20/2022]
Abstract
Abstract
In the current study, an assessment of the melt-compounding approach upon the behavior of blast furnace slag (BFS) filled polypropylene (PP) is reported. Two melt-compounding technologies are compared in terms of thermodynamic considerations as well as final behavior of the produced compounds. For this comparison, three PP-BFS formulations are introduced, where non-treated BFS is melt-mixed with PP via (1) internal lab mixer (IM) and (2) co-rotating twin-screw compounder (TSC). PP-BFS compounds from both processes are formed into plates via compression molding, characterized and tested for rheological, thermal and mechanical behavior. Processing parameters were evaluated for both processes such as specific shear work, residence time and shear rates. In addition, the rheological, thermal and mechanical behavior of comparable compounds are evaluated. The calculated specific shear work values for IM and TSC are 0.15 and 0.1 kW · h · kg−1. Calculated residence time for TSC is 55 s. Regarding the rheological behavior, it was found that melt mixing via both technologies did not show major differences in complex viscosity or storage- and loss moduli values. DSC findings show that crystallization and melting temperatures of IM- and TSC formulations are comparable. Decreased strain values are noticed for TSC compounds, while tensile modulus is found to be independent of process variation.
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Affiliation(s)
- A. Mostafa
- Polymer Competence Center Leoben GmbH (PCCL) , Leoben , Austria
| | - G. Pacher
- Polymer Competence Center Leoben GmbH (PCCL) , Leoben , Austria
| | - T. Lucyshyn
- Chair of Polymer Processing , Montanuniversitaet Leoben, Leoben , Austria
| | - C. Holzer
- Chair of Polymer Processing , Montanuniversitaet Leoben, Leoben , Austria
| | - E. Krischey
- Chair of Mineral Processing , Montanuniversitaet Leoben, Leoben , Austria
| | - H. Flachberger
- Chair of Mineral Processing , Montanuniversitaet Leoben, Leoben , Austria
| | - B. Fritz
- voestalpine Stahl GmbH , Linz , Austria
| | - S. Laske
- Research Center Pharmaceutical Engineering GmbH , TU Graz, Graz , Austria
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Wieland N, Boss J, Lettmann S, Fritz B, Schwaiger K, Bauer J, Hölzel C. Susceptibility to disinfectants in antimicrobial-resistant and -susceptible isolates of Escherichia coli, Enterococcus faecalis and Enterococcus faecium from poultry-ESBL/AmpC-phenotype of E. coli is not associated with resistance to a quaternary ammonium. J Appl Microbiol 2017; 122:1508-1517. [DOI: 10.1111/jam.13440] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 02/17/2017] [Accepted: 03/01/2017] [Indexed: 11/28/2022]
Affiliation(s)
- N. Wieland
- Chair of Animal Hygiene; WZW; TUM; Freising Germany
| | - J. Boss
- Bavarian Health and Food Safety Authority (LGL); Oberschleißheim Germany
| | - S. Lettmann
- Department of Veterinary Sciences; Faculty of Veterinary Medicine; LMU; München Germany
| | - B. Fritz
- Department of Veterinary Sciences; Faculty of Veterinary Medicine; LMU; München Germany
| | - K. Schwaiger
- Department of Veterinary Sciences; Faculty of Veterinary Medicine; LMU; München Germany
| | - J. Bauer
- Chair of Animal Hygiene; WZW; TUM; Freising Germany
| | - C.S. Hölzel
- Department of Veterinary Sciences; Faculty of Veterinary Medicine; LMU; München Germany
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Lang H, Neubauer J, Fritz B, Spira EM, Strube J, Langer M, Kotter E. A retrospective, semi-quantitative image quality analysis of cone beam computed tomography (CBCT) and MSCT in the diagnosis of distal radius fractures. Eur Radiol 2016; 26:4551-4561. [PMID: 27003138 DOI: 10.1007/s00330-016-4321-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [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: 03/11/2015] [Revised: 02/29/2016] [Accepted: 03/03/2016] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To compare image quality and diagnostic validity of CBCT and MSCT for distal radius fractures. METHODS 35 CBCT and 33 MSCT scans were retrospectively reviewed with a visual grading scale regarding the depiction of cortical bone, trabecular bone, articular surfaces, and soft tissue. The extent and type of artefacts was analyzed. Agreement on AO classification and measurement of cortical disruption and length of the fracture gap was determined. Fracture reduction was evaluated in post-treatment x-rays. Statistical analysis was performed with visual grading characteristics (VGC), chi square tests, and Kendall's coefficient of concordance. RESULTS CBCT performed significantly worse for cortical bone, articular surfaces, and especially soft tissue. Trabecular bone showed no significant difference. Significantly more CBCT images showed artefacts. Physics-based artefacts were the most common. CBCT scans also showed motion artefacts. There was no significant difference in agreement on AO classification. The agreement on measurements was substantial for both modalities. Slightly more fractures that had undergone MSCT imaging showed adequate reduction. CONCLUSION This initial study of an orthopaedic extremity CBCT scanner showed that the image quality of a CBCT scanner remains inferior for most structures at standard settings. Diagnostic validity of both modalities for distal radius fractures seems similar. KEY POINTS • Subjectively, CBCT remains inferior to MSCT in depicting most structures. • Similar diagnostic validity for CBCT and MSCT imaging of distal radius fractures. • CBCT is a possible alternative to MSCT in musculoskeletal imaging. • Visual grading characteristics (VGC) analysis proves useful in analyzing visual grading scales.
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Affiliation(s)
- H Lang
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - J Neubauer
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany.
| | - B Fritz
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - E M Spira
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - J Strube
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - M Langer
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
| | - E Kotter
- Department of Radiology, University Medical Center Freiburg, Hugstetter Str. 55, 79106, Freiburg, Germany
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Adams F, Qiu T, Fritz B, Pollak S, Miernik A, Wetterauer U, Fischer P. 358 Experimental 3D-printed kidney model based on medical imaging data of human cadavers for educational and surgery planning purposes. ACTA ACUST UNITED AC 2016. [DOI: 10.1016/s1569-9056(16)60360-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Zheng R, Diver R, Caldwell D, Fritz B, Cameron R, Humble P, TeGrotenhuis W, Dagle R, Wegeng R. Integrated Solar Thermochemical Reaction System for Steam Methane Reforming. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.egypro.2015.03.204] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Noguera C, Fritz B, Clément A. Precipitation mechanism of amorphous silica nanoparticles: a simulation approach. J Colloid Interface Sci 2015; 448:553-63. [PMID: 25792478 DOI: 10.1016/j.jcis.2015.02.050] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [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: 10/28/2014] [Revised: 01/22/2015] [Accepted: 02/20/2015] [Indexed: 10/23/2022]
Abstract
HYPOTHESIS Despite its importance in numerous industrial and natural processes, many unsolved questions remain regarding the mechanism of silica precipitation in aqueous solutions: order of the reaction, role of silica oligomers, existence of an induction time and characteristics of the particle population. This may be traced back, in past models, to the lack of account of the first stages of nucleation, size dependence of the growth law, and full particle population. COMPUTATIONAL METHOD: A microscopic description of the nucleation and growth of amorphous silica nanoparticles is achieved which reproduces a large set of experimental measurements, under various thermodynamic conditions. The time evolution of the solution supersaturation and of the precipitate characteristics is established. FINDINGS A growth law of order 6 allows reproducing experimental results, without being correlated to the presence of silica oligomers in the aqueous solution. The saturation plateaus are shown not to be due to an induction period. The characteristics of the particle population are more complex than assumed by simple precipitation models (Johnson-Mehl-Avrami-Kolmogorov or Chronomal models) and strongly depend on how supersaturation is reached. Such a microscopic approach thus proves to be well suited to elucidate the mechanism of nanoparticle formation in natural and industrial contexts.
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Affiliation(s)
- C Noguera
- CNRS, INSP, UMR7588, F-75252 Paris Cedex 05, France; UPMC Univ Paris 06, INSP, UMR7588, F-75252 Paris Cedex 05, France.
| | - B Fritz
- Université de Strasbourg/EOST, CNRS, Laboratoire d'Hydrologie et Géochimie de Strasbourg, 1 rue Blessig, F-67084 Strasbourg Cedex, France
| | - A Clément
- Université de Strasbourg/EOST, CNRS, Laboratoire d'Hydrologie et Géochimie de Strasbourg, 1 rue Blessig, F-67084 Strasbourg Cedex, France
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Affiliation(s)
- E. Husemann
- Chemisches Laboratorium der Universität Freiburg i. Br. und Staatl. Forschungsinstitut für makromolekulare Chemie
| | - B. Fritz
- Chemisches Laboratorium der Universität Freiburg i. Br. und Staatl. Forschungsinstitut für makromolekulare Chemie
| | - B. Pfannemüller
- Chemisches Laboratorium der Universität Freiburg i. Br. und Staatl. Forschungsinstitut für makromolekulare Chemie
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May K, Fritz B, Duschka RL, Haegele J, Vogt F, Hunold P, Barkhausen J, Kovacs A. Vergleich der gefilterten Rückprojektion und einer Modell-basierten iterativen Rekonstruktion der 4. Generation von peripheren CT-Angiografien. ROFO-FORTSCHR RONTG 2013. [DOI: 10.1055/s-0033-1346338] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fritz B, Henes J, Fritz J, Ioanoviciu S, Horger M. Imaging Response Monitoring to Novel Agents in Autoimmune Diseases - Übersicht moderner medikamentöser Therapien autoimmuner Erkrankungen und die Rolle des bildgebenden Monitorings. ROFO-FORTSCHR RONTG 2013; 185:403-7. [DOI: 10.1055/s-0032-1319410] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Fritz B, Clément A, Montes-Hernandez G, Noguera C. Calcite formation by hydrothermal carbonation of portlandite: complementary insights from experiment and simulation. CrystEngComm 2013. [DOI: 10.1039/c3ce26969h] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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Fritz B, Rombach S, Godau J, Berg D, Horstmann T, Grau S. The influence of Nordic Walking training on sit-to-stand transfer in Parkinson patients. Gait Posture 2011; 34:234-8. [PMID: 21640591 DOI: 10.1016/j.gaitpost.2011.05.004] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [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: 02/05/2010] [Revised: 04/19/2011] [Accepted: 05/07/2011] [Indexed: 02/02/2023]
Abstract
Neurodegenerative processes in Parkinson's disease (PD) particularly affect activities of daily living (ADL). Problems of patients with PD in sit-to-stand (STS) performance have been verified before, but not the effects of training on biomechanical measures of STS function. This pilot study aimed to analyse effects of 12 weeks of Nordic Walking training and severity of PD: healthy controls (CO), least (UPDRS A) and more severe (UPDRS B) affected PA on selected functional outcome measures. We expected improvements in PD similar to CO, with better performance of the unstable second phase and faster execution of the entire movement with higher velocities of centre of gravity (COG). 3D kinematics of 22 PD and 18 CO subjects before and after training, were recorded using a motion analysis system (Vicon, Oxford). We compared five outcome measures for STS in 11 PD and 11 CO, matched according to age, gender, height, and weight. Effects of Nordic Walking training were not statistically significant but indicated different patterns which depended on the values of patient's UPDRS score (part III, motor functions). Time required for STS performance increased and horizontal and vertical velocity of COG decreased in UPDRS B, which could be due to progression of PD during the training period. In contrast, UPDRS A showed similar effects as CO. The effects of Nordic Walking as an easy, economic and low-risk intervention on STS in PD depend on the degree of PD. Our findings may help scientists, patients, and therapists to adjust sport-physiological interventions.
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Affiliation(s)
- B Fritz
- Medical Clinic, Department of Sports Medicine, University of Tuebingen, Silcherstrasse 5, 72076 Tuebingen, Germany.
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Crovisier JL, Fritz B, Grambow B, Eberhart JP. Dissolution of Basaltic Glass in Seawater : Experiments and Thermodynamic Modelling. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-50-273] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The reaction of basalt glasses with natural waters were proposed as analog systems to the long-term alteration of nuclear waste glasses in the geosphere [1].
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Crovisier JL, Advocat T, Petit JC, Fritz B. Alteration of Basaltic Glass in Iceland as a Natural Analogue for Nuclear Waste Glasses: Geochemical Modelling with DISSOL. ACTA ACUST UNITED AC 2011. [DOI: 10.1557/proc-127-57] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
ABSTRACTThe long term geochemical consequences of basaltic glass dissolution in fresh water at 0°C have been calculated with the computer code DISSOL. The clay minerals were represented by an ideal solid solution model (CISSFIT) able to describe variations in chemical composition of a clay phase in response to variations of the solution chemistry. The predicted mineral phases were iron hydroxides followed by kaolinite, TOT clays, chabazite and cli-noptilolite. These results are in reasonably good agreement with experimental results and observations of altered subglacial hyaloclastites from Iceland. The formation of secondary products are mainly controlled by thermodynamic constraints. Kinetic effects, such as diffusion in the near glass surface are not important.
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Abstract
ABSTRACTShort and long-term geochemical interactions of R7T7 nuclear glass with water at 100°C were simulated with the DISSOL thermokinetic computer code. Both the dissolved glass quantity and the resulting water composition, saturation states and mineral quantities produced were calculated as a function of time. The rate equation used in the simulation was first proposed by Aagaard and Hegelson: v = k+.S.a(H+)-n(l - e-(A/RT)). It simulates a gradually diminishing dissolution rate as the reaction affinity diminishes. The best agreement with 1-year experimental data was obtained with a reaction affinity calculated from silica activity (Grambow's hypothesis) rather than taking into account the activity of all the glass components as proposed by Jantzen and Plodinec. The concept of residual affinity was introduced by Grambow to express the fact that the glass dissolution rate does not cease. We prefer to replace the term “residual affinity” by “contextual affinity”, which expresses the influence on the dissolution rate of three factors: the solution chemistry, the metastability of SiO2(m), and the possible precipitation of certain aluminosilicates such as zeolites.
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Lorenz K, Rhasa D, Zellner R, Fritz B. Laser Photolysis - LIF Kinetic Studies of the Reactions of CH3O and CH2CHO with O2 between 300 and 500 K. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19850890346] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Fritz B, Handwerk V, Preidel M, Zellner R. Direct Detection of Hydroxy-Cyclohexadienyl in the Gas Phase by cw-UV-Laser Absorption. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/bbpc.19850890347] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Sheets MD, Fritz B, Hartley RS, Zhang Y. Polyribosome analysis for investigating mRNA translation in Xenopus oocytes, eggs and embryos. Methods 2010; 51:152-6. [PMID: 20096782 DOI: 10.1016/j.ymeth.2010.01.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 01/16/2010] [Accepted: 01/19/2010] [Indexed: 10/19/2022] Open
Abstract
The earliest stages of animal development occur without the benefit of zygotic transcription. The absence of transcription necessitates that all changes in the levels of specific proteins must be controlled by post-transcriptional mechanisms, such as the regulated translation of stored maternal mRNAs. One of the major challenges to investigating translational mechanisms is the availability of reliable methods for assaying the translational state of specific mRNAs. The most definitive assay of an mRNA's translational state is polyribosome association; mRNAs actively translated are engaged with polyribosomes while mRNAs translationally repressed are not. While linear gradient centrifugation is commonly used to purify polyribosomes from a wide variety of cell types in different organisms, the isolation of polyribosomes from Xenopus oocytes, eggs and embryos presents some unique challenges. Here we detail the methodology for the isolation and analysis of polyribosomes from Xenopus oocytes, eggs and embryos using step gradient centrifugation. We present detailed protocols, describe the critical controls and provide several examples to guide the interpretation of experimental results regarding the translational state of specific mRNAs.
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Affiliation(s)
- M D Sheets
- University of Wisconsin School of Medicine and Public Health, Department of Biomolecular Chemistry, Madison, WI 53706, USA.
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Abstract
BACKGROUND The objective of our study is to evaluate the functional and subjective results following subtalar dislocations without any associated bone injuries and to examine whether the direction of dislocation has any effect on the post-traumatic results. METHODS Over the period from February 1998 to May 2006, 56 patients with a subtalar dislocation were enrolled in the study. A subtalar dislocation without any associated bone injuries was only present in 13 patients. Follow-up examination after an average of 39.8 months was performed using the AOFAS Ankle-Hindfoot scale. The adapted classification developed by Altman was used to assess the post-traumatic degree of arthrosis radiologically. RESULTS The average AOFAS score was 81, with good results in 11 patients and satisfactory results in 2 patients. The range of motion (ROM) for the ankle-hindfoot joint was 39.2 degrees . CONCLUSION Despite the severity of the injury, the functional and subjective results of subtalar dislocations without any bone injuries are good. Generally, no early post-traumatic arthrosis occurs if there are no associated bone injuries. No differences were established between medial and lateral subtalar dislocations.
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Affiliation(s)
- P Jungbluth
- Klinik für Unfall- und Handchirurgie, Heinrich Heine Universitätsklinikum Düsseldorf, Düsseldorf, Deutschland
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Hoffmann WC, Farooq M, Walker TW, Fritz B, Szumlas D, Quinn B, Bernier U, Hogsette J, Lan Y, Huang Y, Smith VL, Robinson CA. Canopy penetration and deposition of barrier sprays from electrostatic and conventional sprayers. J Am Mosq Control Assoc 2009; 25:323-331. [PMID: 19852223 DOI: 10.2987/08-5780.1] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
An experimental study was conducted to investigate the usefulness of electrostatic and conventional sprayers for barrier applications. Two conventional and three electrostatic sprayers were used in the study. Usefulness of the sprayers was rated based on penetration of spray into and deposition onto 2 sides of leaves on natural vegetation. Bifenthrin (Talstar adulticide) was applied at labeled rate, fluorescent dye was added to the tank mix as tracer, and all sprayers applied the dye and insecticide at the same rate. The results indicated that sprayers producing larger droplets produced significantly higher deposition on vegetation in barrier applications than the sprayers producing smaller droplets. Sprayers with higher air velocity at the nozzle discharge proved significantly better for barrier sprays than the sprayers with lower air velocity. Electrostatic sprayers did not show any improvement in deposition on vegetation or in penetration into vegetation over the conventional sprayers. There was no difference in deposition between truck-mounted and backpack sprayers.
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Affiliation(s)
- W C Hoffmann
- USDA-ARS-Areawide Pest Management Research Unit, College Station, TX 77845, USA
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Schiff ND, Giacino JT, Kalmar K, D.Victor J, Baker K, Gerber M, Fritz B, Eisenberg B, Biondi T, O’Connor J, Kobylarz EJ, Farris S, Machado A, McCagg C, Plum F, Fins JJ, Rezai AR. Schiff et al. reply. Nature 2008. [DOI: 10.1038/nature06575] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Schiff ND, Giacino JT, Kalmar K, Victor JD, Baker K, Gerber M, Fritz B, Eisenberg B, Biondi T, O’Connor J, Kobylarz EJ, Farris S, Machado A, McCagg C, Plum F, Fins JJ, Rezai AR. Erratum: Behavioural improvements with thalamic stimulation after severe traumatic brain injury. Nature 2008. [DOI: 10.1038/nature06818] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Ouellette H, Thomas BJ, Kassarjian A, Fritz B, Tétreault P, Palmer WE, Torriani M. Re-examining the association of os acromiale with supraspinatus and infraspinatus tears. Skeletal Radiol 2007; 36:835-9. [PMID: 17415560 DOI: 10.1007/s00256-007-0305-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [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: 10/31/2006] [Revised: 01/02/2007] [Accepted: 02/05/2007] [Indexed: 02/02/2023]
Abstract
PURPOSE To re-evaluate the relationship between os acromiale and rotator cuff tears. METHODS We retrospectively analyzed 84 magnetic resonance imaging studies of the shoulder. Forty-two subjects with os acromiale (n = 42; 32 men and ten women, age 25-81 years, mean 47.6 years) were compared with age- and gender-matched subjects with no evidence of os acromiale (controls). Arthroscopy data were available in 19 os acromiale and 12 control subjects. Statistical analyses were performed to determine differences between groups regarding rotator cuff tears affecting the supraspinatus and infraspinatus tendons detected by magnetic resonance imaging and arthroscopy. Analysis of os acromiale type, ossicle synchondrosis edema, acromioclavicular joint degenerative changes and step-off deformity at the synchondrosis were tabulated. RESULTS No statistically significant difference between the os acromiale and control groups was noted, either on magnetic resonance imaging or arthroscopy, with regard to tears of the supraspinatus (P = 1.000 and 0.981, respectively) and infraspinatus (P = 1.000 and 0.667, respectively) tendons. There was a statistically significant increased number of supraspinatus (P = 0.007) and infraspinatus (P = 0.03) tears in a comparison of subjects with os acromiale and step-off deformity (10/42) vs os acromiale without step-off deformity (32/42). CONCLUSION The presence of os acromiale may not significantly predispose to supraspinatus and infraspinatus tendon tears. However, subjects with step-off deformity of an os acromiale are at greater risk of rotator cuff tears than are similar subjects without such deformity.
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Affiliation(s)
- H Ouellette
- Musculoskeletal Radiology, Department of Radiology, Massachusetts General Hospital, Harvard Medical School, 55 Fruit Street, YAW-6046, Boston, MA 02114, USA.
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Schiff ND, Giacino JT, Kalmar K, Victor JD, Baker K, Gerber M, Fritz B, Eisenberg B, Biondi T, O'Connor J, Kobylarz EJ, Farris S, Machado A, McCagg C, Plum F, Fins JJ, Rezai AR. Behavioural improvements with thalamic stimulation after severe traumatic brain injury. Nature 2007; 448:600-3. [PMID: 17671503 DOI: 10.1038/nature06041] [Citation(s) in RCA: 580] [Impact Index Per Article: 34.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2007] [Accepted: 06/22/2007] [Indexed: 11/09/2022]
Abstract
Widespread loss of cerebral connectivity is assumed to underlie the failure of brain mechanisms that support communication and goal-directed behaviour following severe traumatic brain injury. Disorders of consciousness that persist for longer than 12 months after severe traumatic brain injury are generally considered to be immutable; no treatment has been shown to accelerate recovery or improve functional outcome in such cases. Recent studies have shown unexpected preservation of large-scale cerebral networks in patients in the minimally conscious state (MCS), a condition that is characterized by intermittent evidence of awareness of self or the environment. These findings indicate that there might be residual functional capacity in some patients that could be supported by therapeutic interventions. We hypothesize that further recovery in some patients in the MCS is limited by chronic underactivation of potentially recruitable large-scale networks. Here, in a 6-month double-blind alternating crossover study, we show that bilateral deep brain electrical stimulation (DBS) of the central thalamus modulates behavioural responsiveness in a patient who remained in MCS for 6 yr following traumatic brain injury before the intervention. The frequency of specific cognitively mediated behaviours (primary outcome measures) and functional limb control and oral feeding (secondary outcome measures) increased during periods in which DBS was on as compared with periods in which it was off. Logistic regression modelling shows a statistical linkage between the observed functional improvements and recent stimulation history. We interpret the DBS effects as compensating for a loss of arousal regulation that is normally controlled by the frontal lobe in the intact brain. These findings provide evidence that DBS can promote significant late functional recovery from severe traumatic brain injury. Our observations, years after the injury occurred, challenge the existing practice of early treatment discontinuation for patients with only inconsistent interactive behaviours and motivate further research to develop therapeutic interventions.
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Affiliation(s)
- N D Schiff
- Department of Neurology & Neuroscience, Weill Cornell Medical College, New York, New York 10021, USA.
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Koch C, Broede H, Wesseler K, Fritz B. Trisomie 5p. Monatsschr Kinderheilkd 2007. [DOI: 10.1007/s00112-005-1185-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Clement A, Fritz B, Made B. Modélisation thermodynamique et cinétique des réactions diagénétiques dans les bassins sédimentaires. Présentation du modèle géochimique KINDISP. ACTA ACUST UNITED AC 2006. [DOI: 10.2516/ogst:1994037] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Korporal M, Fritz B, Haas J, Möller M, Wildemann B. Verbesserung der Hemmkapazität von regulatorischen T-Zellen (CD4+CD25high) bei Patienten mit Multipler Sklerose unter Langzeitbehandlung mit immunmodulatorischen Substanzen. Akt Neurol 2006. [DOI: 10.1055/s-2006-953197] [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: 10/20/2022]
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Grupp T, Miehlke R, Jenny JY, Saragaglia D, Schwiesau J, Fritz B, Blömer W. Biotribology of total knee replacement implants—Influence of the tibio-femoral bearing type on delamination risk, abrasive wear generation and in-vitro kinematics. J Biomech 2006. [DOI: 10.1016/s0021-9290(06)83470-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Korporal M, Möller S, Haas J, Fritz B, Wildemann B. Effects of immunomodulatory drugs on regulatory T cells in multiple sclerosis patients and healthy individuals. Akt Neurol 2005. [DOI: 10.1055/s-2005-919599] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Montes-H G, Fritz B, Clement A, Michau N. Modelling of geochemical reactions and experimental cation exchange in MX 80 bentonite. J Environ Manage 2005; 77:35-46. [PMID: 15946786 DOI: 10.1016/j.jenvman.2005.03.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2004] [Revised: 01/11/2005] [Accepted: 03/03/2005] [Indexed: 05/02/2023]
Abstract
Bentonites are widely used for waste repository systems because of their hydrodynamic, surface and chemical-retention properties. MX 80 bentonite (bentonite of Wyoming) contains approximately 85% Na/Ca-montmorillonite and 15% accessory minerals. The dominant presence of Na/Ca-montmorillonite in this clay mineral could cause it to perform exceptionally well as an engineered barrier for a radioactive waste repository because this buffer material is expected to fill up by swelling the void between canisters containing waste and the surrounding ground. However, the Na/Ca-montmorillonite could be transformed to other clay minerals as a function of time under repository conditions. Previous modelling studies based on the hydrolysis reactions have shown that the Na/Ca-montmorillonite-to-Ca-montmorillonite conversion is the most significant chemical transformation. In fact, this chemical process appears to be a simple cation exchange into the engineered barrier. The purpose of the present study was two-fold. Firstly, it was hoped to predict the newly formed products of bentonite-fluid reactions under repository conditions by applying a thermokinetic hydrochemical code (KIRMAT: Kinetic Reactions and Mass Transport). The system modelled herein was considered to consist of a 1-m thick zone of water-saturated engineered barrier. This non-equilibrated system was placed in contact with a geological fluid on one side, which was then allowed to diffuse into the barrier, while the other side was kept in contact with iron-charged water. Reducing initial conditions ( [P(O)2 approximately equals 0] ; Eh=-200 mV) and a constant reaction temperature (100 degrees C) were considered. Secondly, it was hoped to estimate the influence of inter-layer cations (Ca and Na) on the swelling behaviour of the MX 80 bentonite by using an isothermal system of water vapour adsorption and an environmental scanning electron microscope (ESEM) coupled with a digital image analysis (DIA) program. Here, the MX 80 bentonite was previously treated with concentrated solutions (1N) of calcium and sodium chlorides. The results confirmed that the Na/Ca-montmorillonite-to-Ca-montmorillonite conversion was the main chemical transformation in the bentonite barrier under repository conditions. A simplified method (based on volume balance) has shown that the swelling capacity of the engineered barrier would be slightly affected after 1000 years of diffusion-reaction because the volume of neo-formed swelling clays is almost directly proportional to the volume of transformed initial-montmorillonite. Minimal neo-formation of saponites, vermiculites and chlorites was also observed. In addition, an isothermal system of water adsorption and ESEM-DIA methods showed that in the raw-bentonite-to-Ca-bentonite exchange there is a small decrease in the amount of adsorbed water and the swelling potential.
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Affiliation(s)
- G Montes-H
- UMR 7517 ULP-CNRS, CGS, 1 rue Blessig, F-67084 Strasbourg, France.
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Blondin D, Fritz B, Rado Y, Mödder U, Cohnen M. Einfluss des Flipwinkels und der Stent-Orientierung auf die subjektiv bewertete Sichtbarkeit des Stentlumens in der KM-gestützten MR-Angiographie bei 1.0 Tesla. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Blondin D, Rado Y, Fritz B, Mödder U, Cohnen M. Einfluss des Flipwinkels auf die Signalintensität im Lumen selbstexpandierender Stents KM-gestützter MR-Angiographie bei 1,0 Tesla. ROFO-FORTSCHR RONTG 2005. [DOI: 10.1055/s-2005-867919] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Wieser R, Fritz B, Ullmann R, Müller I, Galhuber M, Storlazzi CT, Ramaswamy A, Christiansen H, Shimizu N, Rehder H. Novel rearrangement of chromosome band 22q11.2 causing 22q11 microdeletion syndrome-like phenotype and rhabdoid tumor of the kidney. Hum Mutat 2005; 26:78-83. [PMID: 15957176 DOI: 10.1002/humu.20195] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
The 22q11.2 microdeletion syndrome is the most frequent microdeletion syndrome in humans, yet its genetic basis is complex and is still not fully understood. Most patients harbor a 3-Mb deletion (typically deleted region [TDR]), but occasionally patients with atypical deletions, some of which do not overlap with each other and/or the TDR, have been described. Microduplication of the TDR leads to a phenotype similar, albeit not identical, to the deletion of this region. Here we present a child initially suspected of having 22q11 microdeletion syndrome, who in addition developed a fatal malignant rhabdoid tumor of the kidney. Detailed cytogenetic and molecular analyses revealed a complex de novo rearrangement of band q11 of the paternally derived chromosome 22. This aberration exhibited two novel features. First, a microduplication of the 22q11 TDR was associated with an atypical 22q11 microdeletion immediately telomeric of the duplicated region. Second, this deletion was considerably larger than previously reported atypical 22q11 deletions, spanning 2.8 Mb and extending beyond the SMARCB1/SNF5/INI1 tumor suppressor gene, whose second allele harbored a somatic frameshift-causing sequence alteration in the patient's tumor. Two nonallelic homologous recombination events between low-copy repeats (LCRs) could explain the emergence of this novel and complex mutation associated with the phenotype of 22q11 microdeletion syndrome.
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Affiliation(s)
- R Wieser
- Abteilung für Humangenetik, Klinisches Institut für Medizinische und Chemische Labordiagnostik, Medizinische Universität Wien, Wien, Austria.
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Viehöver A, Haas J, Hug A, Vetter T, Milkova L, Fritz B, Falk C, Suri-Payer E, Krammer P, Wildemann B. CD4+CD25 high regulatory T-cells of patients with Multiple Sclerosis have a reduced suppressive effect on proliferation and cytokine secretion of responder T-cells. Akt Neurol 2004. [DOI: 10.1055/s-2004-833321] [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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Yaron R, Fritz B, Cohnen MG, Poll LW, Mödder U, Koch JA. Using „Off the shelf“ Digital Cameras to Digitize Film into Your PACS and Lightbox Free Environment. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828096] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hug A, Haas J, Viehöver A, Fritz B, Storch-Hagenlocher B, Wildemann B. CD4+CD25- effector T cells from healthy controls and MS patients do not differ in mRNA expression of IFN-γ, IL-2, and TNF-α. Akt Neurol 2004. [DOI: 10.1055/s-2004-833325] [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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Yaron R, Blondin D, Fritz B, Mödder U, Koch JA. 2 years experience of a public domain PACS at a German university clinic. ROFO-FORTSCHR RONTG 2004. [DOI: 10.1055/s-2004-828095] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Fritz B, Doss S, McCann L, Wrone E. Comparison of Dual Dialyzers in Parallel and Series to Improve Urea Clearance in Large Hemodialysis Patients. Hemodial Int 2003. [DOI: 10.1046/j.1492-7535.2003.01211.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Joos S, Radlwimmer B, Nessling M, Fritz B, Schwaenen C, Wessendorf S, Bentz M, Lichter P. [A new dimension of DNA analysis: genomic profiling by matrix CGH]. Verh Dtsch Ges Pathol 2003; 87:165-71. [PMID: 16888909] [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: 05/11/2023]
Abstract
Analysis of genetic alterations in tumor cells represent a first step to understand the molecular mechanism of cancer etiology and development. Due to the progress in genome research, it is feasible to assess the complexity of genomic changes on a large scale. Protocols for gene expression profiling using cDNA arrays have been developed allowing to test the activity of almost all human genes in tumor cells. Another important approach is matrix-CGH which was recently developed to assess gains and losses on the genomic level with high resolution. This method not only allows to narrow down the position of novel oncogenes or tumor suppressor-genes but also contributes to a refinement of tumor classifications. Since matrix-CGH can be performed under highly standardized conditions in a fully automatized way, it is suited for diagnostics in clinical laboratories.
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Affiliation(s)
- S Joos
- Deutsches Krebsforschungszentrum, Abteilung Molekulare Genetik (B060), Heidelberg
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Abstract
MR-urography presents a new diagnostic approach to the urinary system, resulting in images comparable to those known from i.v.-urography. T2-weighted MR-urograms demonstrate static fluid without ionizing radiation or nephrotoxic contrast media. The excretory renal function can be examined by the use of gadolinium-enhanced T1-urography. The degree and cause of ureteric obstruction can be diagnosed with high sensitivity and specificity. On the other hand, urolithiasis is frequently misdiagnosed by MR-urography and, in this case, spiral CT should be used. Pediatric or pregnant patients can be examined as well as donors before and patients after renal transplantation. Furthermore, in case of a tumor MR-imaging, including MR-angiography, is a potential diagnostic "all-in-one" approach.
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Affiliation(s)
- M Cohnen
- Institut für Diagnostische Radiologie, Universitätsklinikum Düsseldorf.
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Wessendorf S, Lichter P, Schwänen C, Fritz B, Baudis M, Walenta K, Kloess M, Döhner H, Bentz M. Potential of chromosomal and matrix-based comparative genomic hybridization for molecular diagnostics in lymphomas. Ann Hematol 2002; 80 Suppl 3:B35-7. [PMID: 11757703 DOI: 10.1007/pl00022785] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/29/2022]
Affiliation(s)
- S Wessendorf
- Deutsches Krebsforschungszentrum Heidelberg, Abt. Organisation komplexer Genome
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