Inhaltsbereich

Education and Training

1996    Ph.D. "Entwicklung und präklinische Testung eines Sytems zur Reaktivierung gelähmter Beinmuskulatur über FES-Vielkanalimplantate (Beinschrittmacher)"

 

Positions and Employment

1992-1996: University Assistant, Department of Biomedical Engineering and Physics, University of Vienna, Medical School, Vienna, Austria

since 1996: Assistant Professor, Department of Biomedical Engineering and Physics, University of Vienna, Medical School, Vienna, Austria

since 1993: IT Administrator: IT development and maintenance, Novell Server administration, User management, Networking

 

 Actual Functions 

 

	President of the International Functional Electrical Stimulation Society (IFESS)
	Member of the Editorial Board of Neuromodulation
	Guest Editor of Special FES Issues of Artificial Organs

 

Organizer (in team with W. Mayr and M. Pichler) of the triennal "Vienna Int. Workshop on FES"

Co-Chair of the
"10th Vienna International Workshop on Functional Electrical Stimulation and 15th IFESS Annual Conference, 2010"

 

Projects

FFG project: "Modulares Biosignal-Messsystem (Proj. Nr. 822803)

Bürgermeisterprojekt "Vermeidung von Sternuminstabilität nach herzchirurgischen Eingriffen – Bestimmung der Effektivität von Stützsystemen durch Messung der Druckverteilung an der Thoraxwand"

 

Teaching

Medical University of Vienna: Various Topics out of the fields Good Scientific Practice and Biomedical Engineering

University of Applied Sciences Technikum Wien: Biomedical Engineering, FES, Programing, Scientific Paper Writing, Electronic Laboratory

 

Expertise

Hardware & Software Development

• Design of Amplifier and Stimulation Circuitry (Simulation, PCB development, Testing)
• Software for PC (Drivers, GUI) with MS Visual Studio (C#) , Borland Delph
• Development of Microprocessor Firmware especially for the Microchip PIC series with MPLAB in Assembler and C
• Web Applications with MS Visual Studio ASP, Typo3, Drupal, Joomla
• Database applications for PC and Web, MS SQL Server, MySQL
• Interfacing PC and µP based devices RS232, Bluetooth, Zigbee, WiFi, USB, CAN

 

 

Fields of research

Functional electrical stimulation (mobilization of paraplegics, phrenic pacing, EMG-controlled stimulation, denervated muscles, application of FES in microgravity)

Biofeedback (development of sensors and circuitry, methodologies)

Various research and development topics in collaboration with clinical partners.

 

Selected Publications

[1]  M. Gorlitzer, S. Folkmann, J. Meinhart, P. Poslussny, M. Thalmann, G. Weiss, M. Bijak, und M. Grabenwoeger, “A newly designed thorax support vest prevents sternum instability after median sternotomy,” European Journal of Cardio-Thoracic Surgery: Official Journal of the European Association for Cardio-Thoracic Surgery,  vol. 36, Aug. 2009, S. 335-339; discussion 339.

[2]  J. Hausmann, G. Vekszler, M. Bijak, T. Benesch, V. Vécsei, und C. Gäbler, “Biomechanical comparison of modified Kessler and running suture repair in 3 different animal tendons and in human flexor tendons,” The Journal of Hand Surgery,  vol. 34, Jan. 2009, S. 93-101.

[3]  W. Mayr und M. Bijak, “Contributions from the 9th Vienna International Workshop on Functional Electrical Stimulation,” Artificial Organs,  vol. 32, Aug. 2008, S. 575-576.

[4]  Z. Ashley, H. Sutherland, H. Lanmüller, M.F. Russold, E. Unger, M. Bijak, W. Mayr, S. Boncompagni, F. Protasi, S. Salmons, und J.C. Jarvis, “Atrophy, but not necrosis, in rabbit skeletal muscle denervated for periods up to one year,” American Journal of Physiology. Cell Physiology,  vol. 292, Jan. 2007, S. C440-451.

[5]  S. Sauermann, D. Rafolt, M. Bijak, E. Unger, H. Lanmueller, G. Weigel, W. Girsch, und W. Mayr, “Objective assessment of the fusion frequency in functional electrical stimulation using the fast Fourier transform,” Biomedizinische Technik. Biomedical Engineering,  vol. 52, 2007, S. 267-273.

[6]  M. Bijak, M. Rakos, C. Hofer, W. Mayr, M. Strohhofer, D. Raschka, und H. Kern, “Stimulation parameter optimization for FES supported standing up and walking in SCI patients,” Artificial Organs,  vol. 29, März. 2005, S. 220-223.

[7]  D. Rafolt, E. Gallasch, M. Fend, M. Bijak, H. Lanmüller, und W. Mayr, “Functional electrical stimulation-induced surface muscle stiffness captured by computer-controlled tonometry,” Artificial Organs,  vol. 26, März. 2002, S. 244-247.

[8]  M. Bijak, W. Mayr, M. Rakos, C. Hofer, H. Lanmüller, D. Rafolt, M. Reichel, S. Sauermann, C. Schmutterer, E. Unger, M. Russold, und H. Kern, “The Vienna functional electrical stimulation system for restoration of walking functions in spastic paraplegia,” Artificial Organs,  vol. 26, März. 2002, S. 224-227.

[9]  M. Bijak, W. Mayr, M. Rakos, C. Hofer, H. Lanmüller, D. Rafolt, M. Reichel, S. Sauermann, C. Schmutterer, E. Unger, M. Russold, und H. Kern, “The Vienna functional electrical stimulation system for restoration of walking functions in spastic paraplegia,” Artificial Organs,  vol. 26, März. 2002, S. 224-227.

[10]  M. Bijak, W. Mayr, W. Girsch, H. Lanmüller, E. Unger, H. Stöhr, H. Thoma, und H. Plenk, “Functional and biological test of a 20 channel implantable stimulator in sheep in view of functional electrical stimulation walking for spinal cord injured persons,” Artificial Organs,  vol. 25, Juni. 2001, S. 467-474.

[11]  M. Bijak, W. Mayr, D. Rafolt, A. Tanew, und E. Unger, “Pruritometer 2: portable recording system for the quantification of scratching as objective criterion for the pruritus,” Biomedizinische Technik. Biomedical Engineering,  vol. 46, Mai. 2001, S. 137-141.

[12]  W. Mayr, M. Bijak, D. Rafolt, S. Sauermann, E. Unger, und H. Lanmüller, “Basic design and construction of the Vienna FES implants: existing solutions and prospects for new generations of implants,” Medical Engineering & Physics,  vol. 23, Jan. 2001, S. 53-60.

[13]  M. Bijak, W. Girsch, D. Rafolt, W. Mayr, und H. Lanmüller, “[EMG monitoring in functional electrostimulation],” Biomedizinische Technik. Biomedical Engineering,  vol. 45, Apr. 2000, S. 93-97.

[14]  H. Lanmüller, W. Girsch, S. Sauermann, I. Schwendenwein, E. Unger, M. Bijak, D. Rafolt, und W. Mayr, “Long-term electromyogram recording from the posterior cricoarytenoid muscle as a potential biological trigger for phrenic pacing: results of an animal study,” Artificial Organs,  vol. 23, Sep. 1999, S. 860-868.

[15]  W. Mayr, M. Bijak, W. Girsch, C. Hofer, H. Lanmüller, D. Rafolt, M. Rakos, S. Sauermann, C. Schmutterer, G. Schnetz, E. Unger, und G. Freilinger, “MYOSTIM-FES to prevent muscle atrophy in microgravity and bed rest: preliminary report,” Artificial Organs,  vol. 23, Mai. 1999, S. 428-431.

[16]  H. Lanmüller, S. Sauermann, E. Unger, G. Schnetz, W. Mayr, M. Bijak, D. Rafolt, und W. Girsch, “Battery-powered implantable nerve stimulator for chronic activation of two skeletal muscles using multichannel techniques,” Artificial Organs,  vol. 23, Mai. 1999, S. 399-402.

[17]  M. Bijak, C. Hofer, H. Lanmüller, W. Mayr, S. Sauermann, E. Unger, und H. Kern, “Personal computer supported eight channel surface stimulator for paraplegic walking: first results,” Artificial Organs,  vol. 23, Mai. 1999, S. 424-427.

[18]  H. Lanmüller, S. Sauermann, E. Unger, G. Schnetz, W. Mayr, M. Bijak, und W. Girsch, “Multifunctional implantable nerve stimulator for cardiac assistance by skeletal muscle,” Artificial Organs,  vol. 23, Apr. 1999, S. 352-359.

[19]  H. Lanmüller, S. Sauermann, M. Bijak, und E. Unger, “[Modular PC-based data acquisition and processing system for biological signals],” Biomedizinische Technik. Biomedical Engineering,  vol. 44, März. 1999, S. 52-57.

[20]  S. Sauermann, M. Bijak, C. Schmutterer, E. Unger, H. Lanmüller, W. Mayr, und H. Thoma, “Computer aided adjustment of the phrenic pacemaker: automatic functions, documentation, and quality control,” Artificial Organs,  vol. 21, März. 1997, S. 216-218.

[21]  H. Lanmüller, M. Bijak, W. Mayr, D. Rafolt, S. Sauermann, und H. Thoma, “Useful applications and limits of battery powered implants in functional electrical stimulations,” Artificial Organs,  vol. 21, März. 1997, S. 210-212.

[22]  H. Stein, M. Bijak, E. Heerd, W. Mayr, C. Müller, D. Rafolt, G. Schnetz, und E. Unger, “[Pruritometer 1: Portable measuring system for quantifying scratching as an objective measure of cholestatic pruritus],” Biomedizinische Technik. Biomedical Engineering,  vol. 41, Sep. 1996, S. 248-252.

[23]  W. Girsch, R. Koller, J. Holle, M. Bijak, H. Lanmüller, W. Mayr, und H. Thoma, “Vienna phrenic pacemaker--experience with diaphragm pacing in children,” European Journal of Pediatric Surgery: Official Journal of Austrian Association of Pediatric Surgery ... [et Al] = Zeitschrift Für Kinderchirurgie,  vol. 6, Juni. 1996, S. 140-143.

[24]  G. Creasey, J. Elefteriades, A. DiMarco, P. Talonen, M. Bijak, W. Girsch, und C. Kantor, “Electrical stimulation to restore respiration,” Journal of Rehabilitation Research and Development,  vol. 33, Apr. 1996, S. 123-132.

[25]  W. Girsch, M. Bijak, G. Heger, R. Koller, H. Lanmüller, W. Mayr, H. Thoma, und U. Losert, “Monitoring of FES-induced muscle activity by continuous EMG-recording,” The International Journal of Artificial Organs,  vol. 18, Juni. 1995, S. 340-344.

[26]  W. Mayr, M. Bijak, W. Girsch, J. Holle, H. Lanmüller, H. Thoma, und M. Zrunek, “Multichannel stimulation of phrenic nerves by epineural electrodes. Clinical experience and future developments,” ASAIO Journal (American Society for Artificial Internal Organs: 1992),  vol. 39, Sep. 1993, S. M729-735.