Changes in skin blood flow during apneic spells were determined in 18 preterm infants using a diode laser Doppler flow meter without light conducting fibres. Heart rate, nasal air flow, impedance pneumography, skin and incubator temperature and laser Doppler skin blood flow were recorded simultaneously in each infant. During 212 apneic spells with a duration of 11.6 +/- 7.5 s (mean +/- S.D.) (r...

The practical utilization of soft nanocomposites as a strain mapping sensor in tactile sensors and artificial skins requires robustness for various contact conditions as well as low-cost fabrication process for large three dimensional surfaces. In this work, we propose a multi-point and multi-directional strain mapping sensor based on multiwall carbon nanotube (MWCNT)-silicone elastomer nanocom...

Abstract—An efficient numerical solution is presented for computing per-unit-length impedance of metallic rectangular transmission lines backed by semi-infinite lossy substrate. We formulate the problem into the set of integral equations, the kernel of which is analytically expressed in terms of special functions in the quasi-static regime. The method of moments is applied to find the current d...

The interface between skin and electrodes plays a major role in the accuracy efficiency of biopotential measurements. For reliable biosignal recording, stable low-impedance contact is required target tissue. Conventional wet (Ag/AgCl) are composed metal with skin-adhesive hydrogel. However, for long-term measurement, direct pre-gel electrode causes discomfort irritation, especially infants peop...

This paper presents an electronic system for measuring the impedance of the electrocardiograph signal from its origin (heart) to the electrodes placed on the patient’s skin. The main advantages of this system are that the reading is taken at the frequency of the electrocardiographic signal and that it is a totally noninvasive method, as no external current is applied to the patient besides the ...

Within the framework of the development of a wearable communications system for a sportsman, a textile antenna has been realised. The required antenna needed to be low profile, washable, insensitive to the proximity of the human skin and relatively insensitive to deformation. To overcome the human operator coupling effects on the antenna input impedance, i.e. a shift in resonance frequency and ...

Tissue-engineered skin equivalents mimic key aspects of the human skin, and can thus be employed as wound coverage for large skin defects or as in vitro test systems as an alternative to animal models. However, current skin equivalents lack a functional vasculature limiting clinical and research applications. This study demonstrates the generation of a vascularized skin equivalent with a perfus...