TY  - JOUR
A1  - Sponagel, Stefan
A1  - Unger, J.
T1  - Organisation und Strukturierung technischer Messungen
JF  - Werkstattstechnik. 88 (1998), H. 5
Y1  - 1998
SN  - 1436-5006
SP  - 223
EP  - 226
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
A1  - Spaltofski, R.
T1  - Hochmolekulare Zusätze verbessern die Leichtlaufeigenschaft und die Tragfähigkeit von Schmierfilmen / Sponagel, S.  ; Spaltofski, R.
JF  - Mineralöltechnik. 32 (1987), H. 3
Y1  - 1987
SN  - 0341-1893
SP  - 28 S.
ER  - 
TY  - JOUR
A1  - Sponagel, Stefan
T1  - Der Mensch als Läufer
JF  - Orthopädie und Sport : [Bericht zum Stolberger Orthopädietag, 13. Juni 1998]
Y1  - 1999
SN  - 978-3-89124-540-8
N1  - Inhaltsverzeichnis unter http://www.m-m-sports.com/mm_objects/previews/978-3-89124-540-8p.pdf
SP  - 15
EP  - 21
PB  - Meyer & Meyer
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Frank, T.
A1  - Buchwald, D.
A1  - Pennekamp, W.
A1  - Reber, D.
A1  - Sponagel, Stefan
A1  - Laszkovics, A.
A1  - Weber, Hans-Joachim
T1  - Röntgenologische Untersuchung der Strömungseigenschaften funktioneller Komponenten der Herz-Lungen-Maschine
JF  - Kardiotechnik. 18 (2009), H. 2
Y1  - 2009
SN  - 0941-2670
N1  - gedruckt in der Bibliothek unter der Signatur 63 Z 629
SP  - 31
EP  - 35
ER  - 
TY  - JOUR
A1  - Baroud, G.
A1  - Wu, J.Z.
A1  - Bohner, M
A1  - Sponagel, Stefan
A1  - Steffen, T.
T1  - How to determine the permeability for cement infiltration into osteoporotic cancellous bone
JF  - Medical Engineering & Physics. 25 (2003), H. 4
N2  - Cement augmentation is an emerging surgical procedure in which bone cement is used to infiltrate and reinforce osteoporotic vertebrae. Although this infiltration procedure has been widely applied, it is performed empirically and little is known about the flow characteristics of cement during the injection process. We present a theoretical and experimental approach to investigate the intertrabecular bone permeability during the infiltration procedure. The cement permeability was considered to be dependent on time, bone porosity, and cement viscosity in our analysis. In order to determine the time-dependent permeability, ten cancellous bone cores were harvested from osteoporotic vertebrae, infiltrated with acrylic cement at a constant flow rate, and the pressure drop across the cores during the infiltration was measured. The viscosity dependence of the permeability was determined based on published experimental data. The theoretical model for the permeability as a function of bone porosity and time was then fit to the testing data. Our findings suggest that the intertrabecular bone permeability depends strongly on time. For instance, the initial permeability (60.89 mm4/N.s) reduced to approximately 63% of its original value within 18 seconds. This study is the first to analyze cement flow through osteoporotic bone. The theoretical and experimental models provided in this paper are generic. Thus, they can be used to systematically study and optimize the infiltration process for clinical practice.
KW  - Osteoporose
KW  - Permeabilität
KW  - Viskose Strömung
KW  - Viskosität
KW  - Vertebroplastie
KW  - Cement infiltration
KW  - Vertebroplasty
KW  - Osteoporosis
KW  - Permeability
KW  - Experiment
KW  - Analysis
KW  - Viscous flow
Y1  - 2003
SN  - 1350-4533
SP  - 283
EP  - 288
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, M.
A1  - Hormes, M.
A1  - Steinseifer, U.
A1  - Arora, D.
A1  - Coronado, O.
A1  - Pasquali, M.
T1  - A Review of Computational Fluid Dynamics Analysis of Blood Pumps
JF  - European Journal of Applied Mathematics. 20 (2009), H. 4
Y1  - 2009
SP  - 363
EP  - 397
PB  - Cambridge Univ. Press
CY  - Cambridge
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Finocchiaro, Thomas
A1  - Heinke, Stefanie
A1  - Leßmann, Marc
T1  - Methods of design, simulation, and control for the development of new VAD/TAH concepts = Methoden zur Konstruktion, Simulation und Regelung für die Entwicklung von neuen VAD/TAH-Konzepten / Finocchiaro, Thomas ; Heinke, Stefanie ; Behbahani, Mehdi ; Leßma
JF  - Biomedizinische Technik / Biomedical Engineering. 54 (2009), H. 5
Y1  - 2009
SN  - 0013-5585
N1  - Printausgabe in der Bereichsbibliothek Jülich vorhanden : 63 Z 471
SP  - 269
EP  - 281
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Spillner, Jan
A1  - Kopp, Rüdiger
A1  - Finocchiaro, Thomas
T1  - Assistierte Zirkulation : ein Überblick aus klinischer Sicht = Assisted circulation: an overview from a clinical perspective / Spillner, Jan ; Kopp, Rüdiger ; Finocchiaro, Thomas ; Behbahani, Mehdi ; Rossaint, Rolf ; Steinseifer, Ulrich ; Behr, Marek ; Au
JF  - Biomedizinische Technik / Biomedical Engineering. 54 (2009), H. 5
Y1  - 2009
SN  - 0013-5585
N1  - Printausgabe in der Bereichsbibliothek Jülich vorhanden : 63 Z 471
SP  - 255
EP  - 267
PB  - De Gruyter
CY  - Berlin
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, Marek
A1  - Nicolai, Mike
A1  - Probst, Markus
T1  - Towards Shape Optimization for Ventricular Assist Devices Using Parallel Stabilized FEM
JF  - NIC Symposium 2008 : symposium, 20 - 21 February 2008, Forschungszentrum Jülich ; proceedings / organized by John von Neumann Institute for Computing. Ed. by Gernot Münster; Dietrich Wolf; Manfred Kremer (ed.)
Y1  - 2008
SN  - 978-3-9810843-5-1
N1  - NIC series ; 39
SP  - 325
EP  - 332
PB  - Forschungszentrum
CY  - Jülich
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Nicolai, M.
A1  - Probst, M.
A1  - Behr, M.
T1  - Simulation of Blood Flow in a Ventricular Assist Device
JF  - inSIDE. 5 (2007), H. 1
Y1  - 2007
SP  - 28
EP  - 31
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, M.
A1  - Bischof, F.
A1  - Wolf, G. E.
T1  - Kranken Herzen helfen - Ingenieure und Informatiker entwickeln gemeinsam eine Miniaturblutpumpe / Behbahani, M. ; Behr, M. ; Bischof, F. ; Wolf, G. E.
JF  - RWTH-Themen (2007)
Y1  - 2007
SN  - 0179-079X
SP  - 44
EP  - 46
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Nicolai, M.
T1  - Interaktive Exploration von Blutströmungsprozessen in Herzpumpen
JF  - VRCA-Jahresbericht 2005/2006
Y1  - 2006
N1  - Virtual Reality Center <Aachen >
SP  - 88
EP  - 90
PB  - Virtual Reality Center
CY  - Aachen
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Behr, M.
A1  - Arora, D.
A1  - Coronado, O.
A1  - Pasquali, M.
T1  - CFD Analysis of MicroMed Debakey Pump and Hemolysis Prediction / Behbahani, M. ; Behr, M. ; Arora, D. ; Coronado, O. ; Pasquali, M.
JF  - Artificial Organs. 30 (2006), H. 11
Y1  - 2006
SN  - 1525-1594
N1  - Abstracts 14th Congress of the International Society for Rotary Blood Pumps, Leuven, Belgium, August 31–September 2, 2006 ; S7-4
SP  - A45
EP  - A46
ER  - 
TY  - JOUR
A1  - Steinseifer, Ulrich
A1  - Kashefi, Ali
A1  - Hormes, Marcus
A1  - Schoberer, Mark
A1  - Orlikowsky, Thorsten
A1  - Behbahani, Mehdi
A1  - Behr, Marek
A1  - Schmitz-Rode, Thomas
T1  - Miniaturization of ECMO Systems : Engineering Challenges and Methods
JF  - Artificial Organs. 33 (2009), H. 5
Y1  - 2009
SN  - 1525-1594
N1  - Fifth International Conference on Pediatric Mechanical Circulatory Support Systems and Pediatric Cardiopulmonary Perfusion Abstracts <May 28, 2009>
SP  - A55
EP  - A55
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Probst, M.
A1  - Mai, A.
A1  - Tran, L.
A1  - Vonderstein, K.
A1  - Keschenau, P.
A1  - Linde, T.
A1  - Steinseifer, U.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - The influence of high shear on thrombosis and hemolysis in artificial organs
JF  - Artificial Organs
Y1  - 2010
SN  - 0391-3988
N1  - Special Issue: SI ; Meeting abstract
VL  - 33
IS  - 7
SP  - 426
EP  - 426
ER  - 
TY  - JOUR
A1  - Jansen, Sebastian
A1  - Behbahani, Mehdi
A1  - Laumen, Marco
A1  - Kaufmann, Tim
A1  - Hormes, Marcus
A1  - Schmitz-Rode, Thomas
A1  - Behr, Marek
A1  - Steinseifer, Ulrich
T1  - 3D Stereo-PIV Validation for CFD-Simulation of Steady Flow through the Human Aorta using Rapid-Prototyping techniques
Y1  - 2010
N1  - abstract ; IV International Symposium on Modelling of Physiological Flows, Sardinia, Italy, June 02-05, 2010 ; MPF2010
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Mai, A.
A1  - Bergmann, B.
A1  - Waluga, C.
A1  - Behr, M.
A1  - Tran, L.
A1  - Vonderstein, K.
A1  - Mottaghy, K.
T1  - Modeling and Numerical Simulation of Blood Damage
Y1  - 2010
N1  - Posterpresentation ; Umbrella Symposium "Modelling and Simulation in Medicine, Engineering and Sciences", Forschungszentrum Jülich, January 18-20, 2010
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Waluga, C.
A1  - Arlt, S.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - Computational Analysis of Platelet Aggregation in a Taylor-Couette System
JF  - The International Journal of Artificial Organs. 31 (2008), H. 7
Y1  - 2008
SN  - 0391-3988
N1  - Posterpresentation ; European Society of Artificial Organs (ESAO), Geneva, Switzerland
SP  - 643
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Mai, A.
A1  - Waluga, C.
A1  - Bergmann, B.
A1  - Tran, L.
A1  - Vonderstein, K.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - Numerical Modeling of Flow-Related Thrombus Formation under Physiological and Non-Physiological Flow Conditions
JF  - Acta Physiologica
Y1  - 2010
SN  - 1748-1716
N1  - Joint Congress of the Scandinavian and German Physiological Societies, Copenhagen, Denmark, March 27-30, 2010
VL  - 198
IS  - Supplement 677
SP  - 185
ER  - 
TY  - JOUR
A1  - Behbahani, Mehdi
A1  - Tran, L.
A1  - Jockenhövel, S.
A1  - Behr, M.
A1  - Mottaghy, K.
T1  - Numerical prediction of thrombocyte reactions for application to a vascular flow model
JF  - British Journal of Surgery
Y1  - 2011
SN  - 1365-2168
N1  - 46th Congress of the European Society for Surgical Research, Aachen, Germany, 25-28 May 2011 ; ESSR Abstracts 2011 ; Oral Sessions OP10-5
VL  - 98
IS  - S5
SP  - S17
PB  - Oxford University Press
CY  - Oxford
ER  -