26
|
D'Haese JG, Renz BW, Ilmer M, Werner J. [Surgery for isolated local recurrence and metachronous oligometastasis in pancreatic cancer]. Chirurg 2020; 91:628-635. [PMID: 32424598 DOI: 10.1007/s00104-020-01190-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
BACKGROUND Most patients with pancreatic cancer suffer a relapse, which occurs either locally or systemically in the sense of liver and the lung metastases. Surgery for pancreatic cancer has become more radical due to the increased use of multimodal treatment concepts; however, the role of surgery in cases of recurrence remains controversial. OBJECTIVE This review summarizes the surgical treatment options for isolated local recurrence and metachronous oligometastatic pancreatic cancer. MATERIAL AND METHODS A selective literature search was carried out and the current evidence for surgical treatment is summarized. RESULTS There are currently no randomized studies on surgery for metastatic pancreatic cancer. Currently available data, however, show that after surgery long-term survival of up to 32-47 months after metastasectomy can be achieved, especially in patients with local recurrence or isolated pulmonary metastases with low morbidity and mortality. Individualized treatment concepts including surgical resection after initial systemic therapy seem promising even for liver metastases. The greatest survival benefits are consistently shown for all localizations in patients with a long as possible disease-free interval after the first operation. CONCLUSION The treatment of isolated local recurrence or metachronous oligometastatic pancreatic cancer is an interdisciplinary challenge that should be performed in specialized pancreatic treatment centers only. Surgical resection embedded in a multimodal treatment concept can be meaningful in selected cases.
Collapse
|
27
|
Isayev O, Zhu Y, Gasimov E, Werner J, Bazhin AV. Effect of Chemotherapeutic Agents on the Expression of Retinoid Receptors and Markers of Cancer Stem Cells and Epithelial-Mesenchymal Transition. BIOCHEMISTRY (MOSCOW) 2019; 84:1424-1432. [PMID: 31760928 DOI: 10.1134/s0006297919110166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
A large body of evidence suggests that cancer stem cells (CSCs) and epithelial-mesenchymal transition (EMT), as well as expression and function of retinoid receptors, are pivotal features of tumor initiation, progression, and chemoresistance. This is also true for pancreatic ductal adenocarcinoma (PDAC), which represents a clinical challenge due to poor prognosis and increasing incidence. Understanding the above features of cancer cells could open new avenues for PDAC treatment strategies. The aim of this study was to investigate the relation between CSCs, EMT, and retinoid receptors in PDAC after treatment with the chemotherapeutic agents - gemcitabine and 5-fluorouracil. First, we demonstrated the difference in the expression levels of CSC and EMT markers and retinoid receptors in the untreated Mia PaCa-2 and Panc1 cells that also differed in the frequency of spontaneous apoptosis and distribution between the cell cycle phases. Chemotherapy reduced the number of cancer cells in the S phase. Gemcitabine and 5-fluorouracil modulated expression of CSC markers, E-cadherin, and RXRβ in Panc1 but not in Mia PaCa-2 cells. We suggest that these effects could be attributed to the difference in the basal levels of expression of the investigated genes. The obtained data could be interesting in the context of future preclinical research.
Collapse
|
28
|
Visconti A, Pascale M, Centonze G, Anklam E, Betbeder AM, Brereton P, Burns G, Cagnina A, Chiappetta G, Creppy EE, Di Stefano R, Eklund E, Hald B, Herve I, Kakouri E, Larcher R, Majerus P, Medina B, Melotti F, Möller T, Moruno EG, Nuotio K, Pavanello F, Pietri A, Tricard C, van den Top HJ, Versini G, Werner J, Wilson P. Determination of Ochratoxin A in Wine and Beer by Immunoaffinity Column Cleanup and Liquid Chromatographic Analysis with Fluorometric Detection: Collaborative Study. J AOAC Int 2019. [DOI: 10.1093/jaoac/84.6.1818] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
Abstract
The accuracy, repeatability, and reproducibility characteristics of a liquid chromatographic method for the determination of ochratoxin A (OTA) in white wine, red wine, and beer were established in a collaborative study involving 18 laboratories in 10 countries. Blind duplicates of blank, spiked, and naturally contaminated materials at levels ranging from ≤0.01 to 3.00 ng/mL were analyzed. Wine and beer samples were diluted with a solution containing polyethylene glycol and sodium hydrogen carbonate, and the diluted samples were filtered and cleaned up on an immunoaffinity column. OTA was eluted with methanol and quantified by reversed-phase liquid chromatography with fluorometric detection. Average recoveries from white wine, red wine, and beer ranged from 88.2 to 105.4% (at spiking levels ranging from 0.1 to 2.0 ng/mL), from 84.3 to 93.1% (at spiking levels ranging from 0.2 to 3.0 ng/mL), and from 87.0 to 95.0% (at spiking levels ranging from 0.2 to 1.5 ng/mL), respectively. Relative standard deviations for within-laboratory repeatability (RSDr) ranged from 6.6 to 10.8% for white wine, from 6.5 to 10.8% for red wine, and from 4.7 to 16.5% for beer. Relative standard deviations for between-laboratories reproducibility (RSDR) ranged from 13.1 to 15.9% for white wine, from 11.9 to 13.6% for red wine, and from 15.2 to 26.1% for beer. HORRAT values were ≤0.4 for the 3 matrixes.
Collapse
|
29
|
Lobenhofer E, Werner J, Giffin M, Engwall M, Davies R, Homann O, Lafleur M, Moffat G. P1.12-18 Nonclinical Safety Assessment of AMG 757, a DLL3 Bispecific T Cell Engager, in the Cynomolgus Monkey. J Thorac Oncol 2019. [DOI: 10.1016/j.jtho.2019.08.1131] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
30
|
Lohmann P, Stavrinou P, Lipke K, Bauer EK, Ceccon G, Werner J, Fink GR, Shah NJ, Langen K, Galldiks N. P14.32 Spatial discrepancies between FET PET and conventional MRI in patients with newly diagnosed glioblastoma. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
In patients with glioblastoma, the tissue showing contrast enhancement (CE) in MRI is usually the target for resection or radiotherapy. However, the solid tumor mass typically extends beyond the area of CE. Amino acid PET can detect tumor parts that show no CE. We systematically investigated tumor volumes delineated by amino acid PET and MRI in newly diagnosed, untreated glioblastoma patients.
MATERIAL AND METHODS
Preoperatively, 50 patients with subsequently neuropathologically confirmed glioblastoma underwent O-(2-[18F]-fluoroethyl)-L-tyrosine (FET) PET, fluid-attenuated inversion recovery (FLAIR), and CE MRI. Areas of CE were manually delineated. FET PET tumor volumes were segmented using a tumor-to-brain ratio ≥ 1.6. The percentage of overlapping volumes (OV), as well as Dice and Jaccard spatial similarity coefficients (DSC; JSC), were calculated. FLAIR images were evaluated visually.
RESULTS
In 86% of patients (n = 43), the FET PET tumor volume was significantly larger than the volume of CE (21.5 ± 14.3 mL vs. 9.4 ± 11.3 mL; P < 0.001). Forty patients (80%) showed both an increased uptake of FET and CE. In these 40 patients, the spatial similarity between FET and CE was low (mean DSC, 0.39 ± 0.21; mean JSC, 0.26 ± 0.16). Ten patients (20%) showed no CE, and one of these patients showed no FET uptake. In 10% of patients (n = 5), increased FET uptake was present outside of areas of FLAIR hyperintensity.
CONCLUSION
Our results show that the metabolically active tumor volume delineated by FET PET is significantly larger than tumor volume delineated by CE. The data strongly suggest that the information derived from FET PET should be integrated into the management of newly diagnosed glioblastoma patients.
FUNDING
This work was supported by the Wilhelm-Sander Stiftung, Germany
Collapse
|
31
|
Werner J, Stoffels G, Lichtenstein T, Borggrefe J, Lohmann P, Ceccon G, Fink GR, Langen K, Kabbasch C, Galldiks N. P14.17 Differentiation of treatment-related changes from tumor progression: A direct comparison between dynamic FET PET and ADC values obtained from DWI MRI. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
BACKGROUND
Following brain cancer treatment, the capacity of anatomical MRI to differentiate neoplastic tissue from treatment-related changes (e.g., pseudoprogression) is limited. This study compared apparent diffusion coefficients (ADC) obtained by diffusion-weighted MRI (DWI) with static and dynamic parameters of O-(2-[18F]fluoroethyl)-L-tyrosine (FET) PET for the differentiation of treatment-related changes from tumor progression.
MATERIAL AND METHODS
Forty-eight pretreated high-grade glioma patients with anatomical MRI findings suspicious for progression (median time elapsed since last treatment, 16 weeks) were investigated using DWI and dynamic FET PET. Maximum and mean tumor-to-brain ratios (TBRmax, TBRmean) as well as dynamic parameters (time-to-peak and slope values) of FET uptake were calculated. For mean ADC calculation, regions-of-interest analyses were performed on ADC maps calculated from DWI co-registered with the contrast-enhanced MR image. Diagnoses were confirmed neuropathologically (21%) or clinicoradiologically. Diagnostic performance was evaluated using receiver-operating-characteristic analyses or Fisher’s exact test for a combinational approach.
RESULTS
Ten of 48 patients had treatment-related changes (21%). The diagnostic performance of FET PET was significantly higher (threshold for both TBRmax and TBRmean, 1.95; accuracy, 83%; AUC, 0.89±0.05; P<0.001) than that of ADC values (threshold ADC, 1.09x10-3 mm2/s; accuracy, 69%; AUC, 0.73±0.09; P=0.13). The addition of static FET PET parameters to ADC values increased the latter’s accuracy to 89%. The highest accuracy was achieved by combining static and dynamic FET PET parameters (93%).
CONCLUSION
Data suggest that static and dynamic FET PET provide valuable information concerning the differentiation of early treatment-related changes from tumor progression and outperform ADC measurement for this highly relevant clinical question.
Collapse
|
32
|
Rosen J, Stoffels G, Lohmann P, Bauer EK, Werner J, Rapp M, Felsberg J, Fink GR, Langen K, Galldiks N. P14.18 Prognostic value of serial dynamic O-(2-[18F]-fluoroethyl)-L-tyrosine PET in patients with non-resectable malignant glioma undergoing chemoradiation. Neuro Oncol 2019. [DOI: 10.1093/neuonc/noz126.253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
BACKGROUND
A complete resection of high-grade gliomas (HGG) is associated with improved survival, which, however, cannot be achieved in a considerable number of patients. We here evaluated the prognostic value of serial O-(2-[18F]-fluoroethyl)-L-tyrosine (FET) PET in patients with newly diagnosed, non-resectable astrocytic HGG undergoing chemoradiation with temozolomide.
MATERIAL AND METHODS
Serial dynamic FET PET scans were performed in 18 newly diagnosed patients with molecularly defined, non-resectable HGG at baseline and after chemoradiation (8±3 weeks). Both static (tumor/brain ratios, FET tumor volumes) and dynamic FET PET parameters (time-to-peak, slope), as well as MRI changes according to RANO criteria at first follow-up after chemoradiation (8±3 weeks), were obtained. The predictive ability of FET PET parameters and RANO criteria was evaluated with regard to the progression-free survival (PFS). Using ROC analyses, threshold values for FET PET parameters were obtained. Subsequently, univariate and multivariate survival analyses were performed to assess their predictive power for PFS.
RESULTS
ROC analysis revealed that the mean tumor/brain ratio (AUC, 0.84), FET tumor volume (AUC, 0.89), and slope (AUC, 0.72) at baseline were predictive for a prolonged PFS (9.3 vs. 5.7 months, P=0.05; 10.3 vs. 5.9 months; P=0.03; 13.5 vs. 6.2 months, P=0.02, respectively). Furthermore, FET tumor volume and slope remained significant in the multivariate survival analysis (both P<0.05). In contrast, relative changes of static or dynamic FET PET parameters at follow-up and MRI changes according to RANO criteria were not significant in this albeit small series of patients.
CONCLUSION
Results suggest that before initiation of chemoradiation FET PET parameters at baseline can be used to predict PFS in patients with non-resectable HGG.
Collapse
|
33
|
Hooper J, Schwarzkopf R, Fernandez E, Buckland A, Werner J, Einhorn T, Walker PS. Feasibility of single-use 3D-printed instruments for total knee arthroplasty. Bone Joint J 2019; 101-B:115-120. [DOI: 10.1302/0301-620x.101b7.bjj-2018-1506.r1] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Aims This aim of this study was to assess the feasibility of designing and introducing generic 3D-printed instrumentation for routine use in total knee arthroplasty. Materials and Methods Instruments were designed to take advantage of 3D-printing technology, particularly ensuring that all parts were pre-assembled, to theoretically reduce the time and skill required during surgery. Concerning functionality, ranges of resection angle and distance were restricted within a safe zone, while accommodating either mechanical or anatomical alignment goals. To identify the most suitable biocompatible materials, typical instrument shapes and mating parts, such as dovetails and screws, were designed and produced. Results Before and after steam sterilization, dimensional analysis showed that acrylonitrile butadiene styrene could not withstand the temperatures without dimensional changes. Oscillating saw tests with slotted cutting blocks produced debris, fractures, or further dimensional changes in the shape of Nylon-12 and polymethylmethacrylate (MED610), but polyetherimide ULTEM 1010 was least affected. Conclusion The study showed that 3D-printed instrumentation was technically feasible and had some advantages. However, other factors, such as whether all procedural steps can be accomplished with a set of 3D-printed instruments, the logistics of delivery, and the economic aspects, require further study. Cite this article: Bone Joint J 2019;101-B(7 Supple C):115–120
Collapse
|
34
|
Weinert J, Werner J, Williams C. Implementation of a chew-sensor based technology as a tool for equine grazing research. J Equine Vet Sci 2019. [DOI: 10.1016/j.jevs.2019.03.124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
|
35
|
Umair M, Werner J, Holly B, Weiss C. 03:27 PM Abstract No. 154 Venous thromboembolic (VTE) readmission outcomes for cancer vs non-cancer patients with IVC filter. J Vasc Interv Radiol 2019. [DOI: 10.1016/j.jvir.2018.12.205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
|
36
|
Luzbetak M, Süßenguth N, Werner J, Mayer B. The phytochemicals Curcumin and Vitamin C act as immunosensitizer. Eur J Cancer 2019. [DOI: 10.1016/j.ejca.2019.01.063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
37
|
Werner J, Umstatter C, Kennedy E, Grant J, Leso L, Geoghegan A, Shalloo L, Schick M, O'Brien B. Identification of possible cow grazing behaviour indicators for restricted grass availability in a pasture-based spring calving dairy system. Livest Sci 2019. [DOI: 10.1016/j.livsci.2018.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
38
|
Mayerle J, Anz D, D'Haese JG, Werner J. [Endoscopic and surgical treatment of chronic pancreatitis]. Internist (Berl) 2019; 60:235-246. [PMID: 30635667 DOI: 10.1007/s00108-018-0546-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
With an increasing number of hospital admissions, an average of 16-to 20 days in hospital per year, 34% of patients constantly taking pain medication, 57% in need of enzyme supplementation, and 29% with diabetes mellitus, chronic pancreatitis is a debilitating disease of high socio-economic relevance. In total, 33% of all patients suffering from chronic pancreatitis can no longer practice their original profession. The number of unemployed chronic pancreatitis patients due to prolonged stays in hospital or continued alcohol abuse is known to be as high as 40%. Continued alcohol abuse with a hazard ratio (HR) of 1.6, smoking with a HR of 1.4, and the presence of liver cirrhosis with a HR of 2.5 negatively affects the prognosis of chronic pancreatitis. In a patient cohort burdened with high co-morbidity, endoscopic therapy can provide short-term relief of symptoms. Endotherapy is the first line of management in chronic pancreatitis with symptomatic pancreatobiliary ductal obstruction. Further studies are required in certain key areas such as the use of fully covered self-expanding metallic stents for pancreatic ductal and biliary strictures. Long-term success rates can mainly be achieved by surgical procedures, which can be performed with acceptable morbidity in pancreatic centers. The current review focuses on the advantages and disadvantages of endoscopic and surgical treatment of chronic pancreatitis.
Collapse
|
39
|
Westphalen CB, Preinfalk A, Kruger S, Haas M, Renz BW, Riener MO, Weber A, Kirchner T, Werner J, Heinemann V, von Bergwelt-Baildon M, Baba HA, Siveke JT, Ormanns S, Boeck S. Neurotrophic tropomyosin receptor kinase (NTRK) and nerve growth factor (NGF) are not expressed in Caucasian patients with biliary tract cancers: pooled data from three independent cohorts. Clin Transl Oncol 2019; 21:1108-1111. [DOI: 10.1007/s12094-018-02030-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Accepted: 12/21/2018] [Indexed: 12/17/2022]
|
40
|
Filli L, Werner J, Beyer G, Reuter K, Petersen JA, Weller M, Zörner B, Linnebank M. Predicting responsiveness to fampridine in gait-impaired patients with multiple sclerosis. Eur J Neurol 2018; 26:281-289. [DOI: 10.1111/ene.13805] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Accepted: 08/28/2018] [Indexed: 11/29/2022]
|
41
|
Stegmann S, Werner J, Kuhl S, Röhn G, Goldbrunner R, Timmer M. P04.77 Death receptor 6 (DR6) is overexpressed in astrocytomas. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.311] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
42
|
Lohmann P, Stavrinou P, Lipke K, Bauer EK, Ceccon G, Werner J, Fink GR, Shah NJ, Langen K, Galldiks N. P01.014 Spatial correlation of FET uptake and MRI contrast enhancement in newly diagnosed glioblastoma patients prior to treatment. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.056] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
43
|
Werner J, Kuhl S, Krischek B, Goldbrunner R, Timmer M. P01.124 The expression of CD40 correlates negatively with overall survival of gliomas. Neuro Oncol 2018. [DOI: 10.1093/neuonc/noy139.166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
44
|
Altazin S, Stepanova L, Werner J, Niesen B, Ballif C, Ruhstaller B. Design of perovskite/crystalline-silicon monolithic tandem solar cells. OPTICS EXPRESS 2018; 26:A579-A590. [PMID: 29801275 DOI: 10.1364/oe.26.00a579] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 04/20/2018] [Indexed: 06/08/2023]
Abstract
We present an optical model implemented in the commercial software SETFOS 4.6 for simulating perovskite/silicon monolithic tandem solar cells that exploit light scattering structures. In a first step we validate the model with experimental data of tandem solar cells that either use front- or rear-side textures and extract the internal quantum efficiency of the methyl-ammonium lead iodide (MALI) perovskite sub-cell. In a next step, the software is used to investigate the potential of different device architectures featuring a monolithic integration between the perovskite and silicon sub-cells and exploiting rear- as well as front-side textures for improved light harvesting. We find that, considering the available contact materials, the p-i-n solar cell architecture is the most promising with respect to achievable photocurrent for both flat and textured wafers. Finally, cesium-formamidinium-based perovskite materials with several bandgaps were synthetized, optically characterized and their potential in a tandem device was quantified by simulations. For the simulated layer stack and among the tested materials with bandgaps of 1.7 and 1.6 eV, the one with 1.6 eV bandgap was found to be the most promising, with a potential of reaching a power conversion efficiency of 31%. In order to achieve higher efficiencies using higher band-gap materials, parasitic absorptance in the blue spectral range should be further reduced.
Collapse
|
45
|
Violari E, Werner J, Liddell R, Buethe J, Tregnago A, Netto G, Frangakis C, Georgiades C. 3:10 PM Abstract No. 343 Determination of the cryoablation margin: in vivo swine experimentation in renal & hepatic tissue with histopathological assessment: comparison between an abbreviated single 15-minute freeze protocol to the conventional 10-8-10 minute freeze-thaw-freeze protocol. J Vasc Interv Radiol 2018. [DOI: 10.1016/j.jvir.2018.01.381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
|
46
|
Werner J, Graener R. Data Acquisition and Processing in Medicine: Contribution of the Microprocessor. Methods Inf Med 2018. [DOI: 10.1055/s-0038-1635266] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Microprocessor systems facilitate to an increasing extent economical laboratory and process automation in the field of medicine.The general aspects of hardware architecture and the software problems of the microprocessor are briefly demonstrated. Boundary lines to hardware logic on the one hand and to minicomputers on the other hand and the significance and position of the microprocessor in the biomedical EDP spectrum are discussed. As a reasonable concept for biosignal processing and laboratory automation we propose the »distributed microprocessor system« making use of parallel »basic systems«, which may operate independently or may be controlled by a supervisory processor. By way of a concrete example from our laboratory, some of the problems of realization of microprocessor systems are demonstrated.
Collapse
|
47
|
Kleespies A, Mikhailov M, Khalil PN, Pratschke S, Khandoga A, Stangl M, Illner WD, Angele MK, Jauch KW, Guba M, Werner J, Rentsch M. Correction to: Moon phases and Moon signs do not influence morbidity, mortality and long-term survival, after living donor kidney transplantation. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:478. [PMID: 28978311 PMCID: PMC5628488 DOI: 10.1186/s12906-017-1981-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Accepted: 09/20/2017] [Indexed: 11/10/2022]
|
48
|
Zhang X, Chiou D, Werner J, Chheng D, Baird J, Mello M. 434EMF Health Care Experience Assessment of the Rhode Island Cambodian Community: A Sub-Study Comparison With Local and National Demographics. Ann Emerg Med 2017. [DOI: 10.1016/j.annemergmed.2017.07.313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
49
|
Min CH, Goth F, Lutz P, Bentmann H, Kang BY, Cho BK, Werner J, Chen KS, Assaad F, Reinert F. Matching DMFT calculations with photoemission spectra of heavy fermion insulators: universal properties of the near-gap spectra of SmB 6. Sci Rep 2017; 7:11980. [PMID: 28931836 PMCID: PMC5607333 DOI: 10.1038/s41598-017-12080-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2017] [Accepted: 09/04/2017] [Indexed: 11/11/2022] Open
Abstract
Paramagnetic heavy fermion insulators consist of fully occupied quasiparticle bands inherent to Fermi liquid theory. The gap emergence below a characteristic temperature is the ultimate sign of coherence for a many-body system, which in addition can induce a non-trivial band topology. Here, we demonstrate a simple and efficient method to compare a model study and an experimental result for heavy fermion insulators. The temperature dependence of the gap formation in both local moment and mixed valence regimes is captured within the dynamical mean field (DMFT) approximation to the periodic Anderson model (PAM). Using the topological coherence temperature as the scaling factor and choosing the input parameter set within the mixed valence regime, we can unambiguously link the theoretical energy scales to the experimental ones. As a particularly important result, we find improved consistency between the scaled DMFT density of states and the photoemission near-gap spectra of samarium hexaboride (SmB6).
Collapse
|
50
|
Kleespies A, Mikhailov M, Khalil PN, Pratschke S, Khandoga A, Stangl M, Illner WD, Angele MK, Jauch KW, Guba M, Werner J, Rentsch M. Moon phases and moon signs do not influence morbidity, mortality and long-term survival, after living donor kidney transplantation. BMC COMPLEMENTARY AND ALTERNATIVE MEDICINE 2017; 17:440. [PMID: 28870250 PMCID: PMC5584333 DOI: 10.1186/s12906-017-1944-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/15/2017] [Accepted: 08/21/2017] [Indexed: 11/21/2022]
Abstract
Background Approximately 11% of the German population are convinced that certain moon phases and moon signs may impact their health and the onset and clinical course of diseases. Before elective surgery, a considerable number of patients look to optimize the timing of the procedure based on the lunar cycle. Especially patients awaiting living donor kidney transplantation (LDKT) commonly look for an adjustment of the date of transplantation according to the moon calendar. This study therefore investigated the perioperative and long-term outcome of LDKT dependent on moon phases and zodiac signs. Methods Patient data were prospectively collected in a continuously updated kidney transplant database. Two hundred and seventy-eight consecutive patients who underwent LDKT between 1994 and December 2009 were selected for the study and retrospectively assigned to the four moon phases (new-moon, waxing-moon, full-moon, and waning-moon) and the corresponding zodiac sign (moon sign Libra), based on the date of transplantation. Preexisting comorbidities, perioperative mortality, surgical outcome, and long-term survival data were analyzed. Results Of all LDKT procedures, 11.9, 39.9, 11.5, and 36.5% were performed during the new, waxing, full, and waning moon, respectively, and 6.2% during the moon sign Libra, which is believed to interfere with renal surgery. Survival rates at 1, 5, and 10 years after transplantation were 98.9, 92, and 88.7% (patient survival) and 97.4, 91.6, and 80.6% (graft survival) without any differences between all groups of lunar phases and moon signs. Overall perioperative complications and early graft loss occurred in 21.2 and 1.4%, without statistical difference (p > 0.05) between groups. Conclusion Moon phases and the moon sign Libra had no impact on early and long-term outcome measures following LDKT in our study. Thus, concerns of patients awaiting LDKT regarding the ideal time of surgery can be allayed, and surgery may be scheduled independently of the lunar phases.
Collapse
|