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A well defined step compression was applied over an area of the skin and maintained for a fixed time. The resistive force of the tissue, which was continuously recorded, decreased with time as a function of the translocation of fluid volume to the surrounding areas. The rate of decrease was proportional to the fluid mobility. Measurements on ten normal(More)
Movement-induced potentials of streaming potential type were studied in various electrode configurations. The geometric design of the electrode was important for the reduction of noise generated by the movements of gel. Potential and impedance variations were measured for electrode movements in electrolytes. The impedance variations were small and the(More)
  • S. Ödman
  • Medical and Biological Engineering and Computing
  • 1981
Potential and impedance variations were studied with varying mechanical stress upon the skin. The size of the potential variations in the skin and the mechanical stress possess a nonlinear relationship which varies between individuals. The impedance variations did not bring about the potential variations. The time sequences for impedance and potential(More)
  • S. Ödman
  • Medical and Biological Engineering and Computing
  • 1982
The spread and magnitude of deformation-induced potentials causing motion artefacts were studied in the skin area around and beneath surface electrodes. When stretching a rectangular skin zone between two plates fixed to the skin the largest potentials were induced in the zone. The magnitude of the potentials decreased outside the zone with the distance(More)
IN A SERIES of articles and Letters to the Editor SINGH and VATSALA (1979), SINGH (1981) and SINGH and PERIASAMY (1984) reported that red blood cells exposed to low levels of He/Ne laser light showed changes in shape. Crenation and an increased degree of aggregation were also reported. Increased fragility of the cells resulting in a haemolysis was noticed(More)
  • S. Ödman
  • Medical and Biological Engineering and Computing
  • 1989
Changes in skin potentials are known to occur upon stretching and compressing the skin. In this work the relationship between compressional force and changes was studied for forces up to 13·7 N. For a given force, a flatter compressing surface gave lower potential changes than a more curved surface. When temperature increased both changes in potential and(More)
A new instrument for the assessment of oedema based on the impression method is described. The measurement parameters are defined and the errors corresponding to the electrical and mechanical stability of the instrument are measured. The overall accuracy is calculated theoretically for the translocated volume. The accuracy and reproducibility are evaluated(More)
WHEN CORRECTING positions of teeth a force must be applied that is strong enough both to move the teeth and stimulate bone tissue resorption or apposition. However, if the force presses the teeth too hard towards the alveolar bone, the tissue will be compressed excessively and degeneration of the tissue will take place. Therefore, it is important to adjust(More)
CLARK (1956) constructed an electrode suitable for measurement in tissue and blood. The Clark electrode was developed further during the 1960s by KESSLER and LUBBERS (1966) and KESSLER and GRUNEWALD (1969). They were interested in the oxygen pressure distribution within the tissue (LUBBERS, 1977) and therefore built an electrode with eight small separate(More)
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