Advances in material science and semiconductor technology have enabled a variety of inventions to be implemented in electronic systems and devices used in the medical, telecommunications, and consumer electronics sectors. In this paper, a wireless charging system is described as a wearable body heater that uses a chair as a transmitter (Tx). This system incorporates the widely accepted Qi wireless charging standard. Alignment conditions of a linear three-element coil arrangement and a 3 × 3 coil matrix array are investigated using voltage induced in a coil as a performance indicator. The efficiency obtained is demonstrated to be up to 80% for a voltage of over 6.5 Volts and a power transfer of over 5 Watts. Our results and proposed approach can be useful for many applications. This is because the wireless charging system described herein can help design seating areas for the elderly and disabled, commercial systems, consumer electronics, medical devices, electronic textiles (e-textiles), and other electronic systems and devices.

We report a development of severe haemolysis after complete transcatheter closure of patent arterial duct. Aortography and echocardiography revealed no signs of residual shunt. Haemolysis occurred a day after the implantation. Aortography was performed and the extrusion of coil in aorta was evident. The extruded part of the coil was surgically removed. No signs of haemolysis remained.

Occlusion using coils is now the treatment of choice for closure of the patent arterial duct. The DuctOcclud (pfm AG, Cologne, Germany) device is a relatively new retrievable coil for such trans-catheter closure. This study expands on previously reported experience with this device, summarizes the advantages of the device, and compares trans-pulmonary and trans-aortic delivery in 47 patients. There were 27 females. The mean, and median, ages were 4.6, and 2.85 years, respectively. The youngest patient was aged 9 months, weighing 7 kg. A trans-aortic delivery was used in 41 cases, and a trans-pulmonary approach in 6 cases. Of the 47 procedures, 45 (96%) were successful at the first attempt. The other two patients were treated successfully at the second attempt, giving a 100% rate of success. The technical characteristics of the coil allowed for its repeated maneuvering until an optimal position was obtained prior to release. Closure was confirmed by lack of ductal flow by echo-doppler on follow- up echocardiography. No short- or long-term complications of the procedure were noted in any of the patients. We conclude that the DuctOcclud device is an effective and safe method for closure of the small-tomoderately patent arterial duct. In a large proportion of patients, trans-aortic delivery is the preferred approach.