Employment of technical equipment and devices increased intensely in anaesthesiology and intensive care medicine respectively during the last decades. Regarding mechanical ventilation, which is of outstanding clinical value up to date, lots of modes, parameters and features have been developed and technically implemented in modern respirators [1]. Although the ARDS network encouraged scientific...

INTRODUCTION Traditional Chinese medicine offers several theories to explain the mechanism of acupuncture. One of these theories proposes that acupuncture points and meridians have unique electrical properties and their electrical skin impedance is lower than surrounding areas. The aim of this study was to evaluate the differences in electrical skin impedance between PC4 and the pericardium mer...

OBJECTIVES The purpose of our study was to estimate skin structure and conductivity distribution in a cross section of local tissue using non-invasive measurement of impedance data. The present study was designed to evaluate the efficiency of skin depth information through computer simulations. The multilayer tissue model was composed of epidermis, dermis tissues, and subcutaneous. METHODS In...

OBJECTIVES A system is being developed for measurement of biologic active points (BAPs) in humans using a modified dry electrode. The BAPs measuring system analyzed the electrical characteristics and searched for the position of BAPs using modified dry electrodes. SUBJECTS Skin electrical resistance at BAPs and non-BAPs was examined with a modified electrode system for healthy male subjects (...

—We analyze the structure of the general solution of the two-dimensional electrical impedance equation in analytic form using Taylor series in formal powers, for the case when the conductivity is a separable-variables function only once derivable, using a quaternionic reformulation that leads us to a special kind of Vekua equation. Finally, we broach its applications in the eld of electrical im...

Cross-sectional imaging of an electrical conductivity distribution inside the human body has been an active research goal in impedance imaging. By injecting current into an electrically conducting object through surface electrodes, we induce current density and voltage distributions. Based on the fact that these are determined by the conductivity distribution as well as the geometry of the obje...

Imaging the electrical properties of human tissue may aid in cancer diagnoses or monitoring organ function. Traditionally, the electrical properties are revealed with electrical impedance tomography, where currents are injected into human tissue and voltages are measured on the surface. This paper focuses on a method of measuring the electrical properties using a magnetic resonance (MR) scanner...

Purpose Several ex vivo studies have reported that the electrical impedance of malignancies is lower than healthy tissues and benign formations [Malich et al, Eur Radiol 10:1555-61 (2000)]. Therefore, in vivo conductivity imaging may have potential applications in tumor diagnosis. Magnetic resonance electrical impedance tomography (MREIT) is an emerging, non-invasive conductivity imaging modali...

The performance of a prototype impedance imaging (Electrical Impedance Tomography, EIT) system using cortical or scalp electrodes has been assessed in a model of global cerebral ischaemia in the anaesthetised rat. In preliminary calibration experiments using a circular array of electrodes around a tank of saline, the centre of a polythene rod could be localised with a mean error of 4% of the ta...