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Biomedizinische Technik. Biomedical Engineering

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https://read.qxmd.com/read/30657739/does-airborne-ultrasound-lead-to-activation-of-the-auditory-cortex
#1
Robert Kühler, Markus Weichenberger, Martin Bauer, Johannes Hensel, Rüdiger Brühl, Albrecht Ihlenfeld, Bernd Ittermann, Tilmann Sander, Simone Kühn, Christian Koch
As airborne ultrasound can be found in many technical applications and everyday situations, the question as to whether sounds at these frequencies can be heard by human beings or whether they present a risk to their hearing system is of great practical relevance. To objectively study these issues, the monaural hearing threshold in the frequency range from 14 to 24 kHz was determined for 26 test subjects between 19 and 33 years of age using pure tone audiometry. The hearing threshold values increased strongly with increasing frequency up to around 21 kHz, followed by a range with a smaller slope toward 24 kHz...
January 18, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30540556/comparative-biomechanical-evaluation-of-two-technologically-different-microprocessor-controlled-prosthetic-knee-joints-in-safety-relevant-daily-life-situations
#2
Malte Bellmann, Thomas Maximilian Köhler, Thomas Schmalz
Safety-relevant gait situations (walking on stairs and slopes, walking backwards, walking with small steps, simulated perturbations of swing phase extension) were investigated in a motion analysis laboratory with six unilateral transfemoral amputees using two different microprocessor-controlled prosthetic knee joints (Rheo Knee XC, C-Leg). A randomized crossover design was chosen. The study results imply that the performance and safety potential of a microprocessor-controlled knee joint can be associated with the individual control algorithms and the technological concepts that are implemented to generate motion resistances for controlling flexion and extension movements...
December 12, 2018: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753151/session-1-young-scientist-forum
#3
S Janßen, S Gach, S Neuss-Stein, S Rütten, S Kant, I Lauria, S Olschok, U Reisgen, H Fischer
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753150/session-14-poster
#4
H Rebl, J Renner, W Kram, H Hansmann, O Hakenberg, B Nebe
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753149/session-5-biomaterials-inorganic
#5
V Sokolova, Z Shi, S Huang, Y Du, M Kopp, A Frede, T Knuschke, J Buer, D Yang, A M Westendorf, M Epple
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753148/session-10-biofilms-implant-related-infections
#6
C Mikolai, A Ingendoh-Tsakmakidis, A Winkel, N Kommerein, C S Falk, A Rossi, H Walles, M Stiesch
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753147/session-3-biomaterials-natural-polymers
#7
P Welzel, B Newland, C Werner
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753146/session-8-biomaterials-hydrogels
#8
H Stratesteffen, M Köpf, F Kreimendahl, A Blaeser, S Jockenhoevel, H Fischer
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753145/session-13-cell-material-interaction-metals
#9
D Scharnweber, M Franz, B Mingler, K Maciej, L Sajti, C Wolf-Brandstetter
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753144/session-6-tissue-transitions
#10
R Brünler, T Ahlfeld, A Lode, D Aibibu, M Gelinsky, C Cherif
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753143/session-11-biomaterials-metals
#11
C Siemers, F Haase, F Brunke
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753142/session-4-cell-material-interaction
#12
M Klapper, F Karagöz, S H Parekh, R Dorresteijn, K Müllen
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753141/session-9-biomaterials-elektrospinning
#13
T Weigel, T Schmitz, M Jannasch, S Schürlein, R Al Hijailan, S Suliman, H Walles, J Hansmann
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753140/session-2-biofilms-implant-associated-infections
#14
S Kohse, K Wulf, V Pauker, D Arbeiter, N Fiedler, D Bajer, M Stiehm, T Eickner, K Riedel, K P Schmitz, N Grabow
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753139/session-7-translation
#15
S Ghanaati, S Al-Maawi, A Teiler, J Lorenz, D L Salewski, P Thönissen, C J Kirkpatrick, R Sader
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/30753138/session-12-biomaterials
#16
M Wöltje, K Ostermann, D Aibibu, G Rödel, C Cherif
No abstract text is available yet for this article.
February 1, 2019: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/29369809/pupillographic-campimetry-an-objective-method-to-measure-the-visual-field
#17
Krunoslav Stingl, Tobias Peters, Torsten Strasser, Carina Kelbsch, Paul Richter, Helmut Wilhelm, Barbara Wilhelm
Pupillographic campimetry allows measuring the visual field objectively by analyzing the pupil response to perimetric stimuli. One of the drawbacks of this technique, similar to static perimetry, is the need of reliable fixation of the subject. By using stimulus sizes comparable to static perimetry and applying gaze tracking, we enable a retinotopic visual field examination regardless of fixation problems and with an increased stability and improved spatial resolution. Here, we present the results of applying the method in eight normal sighted subjects as well as in three patients suffering from diseases usually diagnosed by perimetry...
November 27, 2018: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/29252187/bone-plate-screw-constructs-for-osteosynthesis-recommendations-for-standardized-mechanical-torsion-and-bending-tests
#18
Hendrik Schorler, Robert Wendlandt, Christian Jürgens, Arndt-Peter Schulz, Christian Kaddick, Felix Capanni
This paper follows up on a recent systematic review of test methods and parameters for biomechanical testing of bone plates and it is the first study that contains recommendations for standardized mechanical testing of bone plate-screw constructs for osteosynthesis. Following the testing philosophy of ASTM F382 and ISO 9585, we have developed standardized quasi-static and dynamic testing methods for straight linear and anatomically shaped plates, including locked type and conventional systems. The test specification comprises torsion and bending tests along the implant axis and therefore modifies and extends the methods proposed by ASTM F382...
November 27, 2018: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/29087950/sensitivity-enhancement-of-a-folded-beam-mems-capacitive-accelerometer-based-microphone-for-fully-implantable-hearing-application
#19
Apoorva Dwivedi, Gargi Khanna
The present work attempts to enhance the sensitivity of a folded beam microelectromechanical systems (MEMS) capacitive accelerometer by optimising the device geometry. The accelerometer is intended to serve as a microphone in the fully implantable hearing application which can be surgically implanted in the middle ear bone structure. For the efficient design of the accelerometer as a fully implantable biomedical device, the design parameters such as size, weight and resonant frequency have been considered. The geometrical parameters are varied to obtain the optimum sensitivity considering the design constraints and the stability of the structure...
November 27, 2018: Biomedizinische Technik. Biomedical Engineering
https://read.qxmd.com/read/29040061/validation-of-a-novel-biomechanical-test-bench-for-the-knee-joint-with-six-degrees-of-freedom
#20
Christian H Heinrichs, Dominik Knierzinger, Hannes Stofferin, Werner Schmoelz
A novel biomechanical test bench has been developed for in-vitro evaluation of the knee joint. The test bench allows the kinematics of the knee joint to be studied in all six degrees of freedom. Flexion-extension knee movements are induced by quadriceps and hamstring muscle forces simulated by five pneumatic cylinders. The kinematics of the knee and the actively applied muscle forces are measured simultaneously. The aim of this study was to validate the sensitivity and reproducibility of this novel test bench...
November 27, 2018: Biomedizinische Technik. Biomedical Engineering
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