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Hung T.-Y.,Zhongxing Branch of Taipei City Hospital | Lee Y.-K.,Tzu Chi University | Huang M.-Y.,Mackay Memorial Hospital | Hsu C.-Y.,National Taiwan University | Su Y.-C.,Tzu Chi University
Scandinavian Journal of Trauma, Resuscitation and Emergency Medicine | Year: 2016

Backgroushan in the general population, and these risks may extend longer than expected. © 2016 Hung et al. Source


Hsu C.-Y.,Zhongxing Branch of Taipei City Hospital | Hsieh P.-L.,Keelung Hospital | Hsieh P.-L.,National Taiwan University | Hsiao S.-F.,National Taiwan University Hospital | And 2 more authors.
BioMed Research International | Year: 2015

Objectives. Cardiac autonomic imbalance accompanies the progression of chronic heart failure (CHF). It is unclear whether exercise training could modulate autonomic control in CHF. This study aimed to review systematically the effects of exercise training on heart rate recovery (HRR) and heart rate variability (HRV) in patients with CHF. Methods. Literatures were systematically searched in electronic databases and relevant references. Only published randomized controlled trials (RCTs) focusing on exercise training for CHF were eligible for inclusion. Outcome measurements included HRR and HRV parameters. Results. Eight RCTs were eligible for inclusion and provided data on 280 participants (186 men). The participants were 52-70 years of age with New York Heart Association functional class II-III of CHF. Each study examined either aerobic or resistance exercise. Two trials addressed outcome of HRR and six HRV among these studies. Two RCTs showed that moderate aerobic exercise could improve HRR at 2 minutes after exercise training in CHF. Five of six RCTs demonstrated positive effects of exercise training on HRV which revealed the increments in high frequency (HF) and decrements in LF (low frequency)/HF ratio after training. Conclusion. Participation in an exercise training program has positive effects on cardiac autonomic balance in patients with CHF. © 2015 Chung-Yin Hsu et al. Source


Chiu H.-W.,National Taipei University of Technology | Chuang J.-M.,National Taipei University of Technology | Lu C.-C.,National Taipei University of Technology | Lin W.-T.,National Taiwan University | And 2 more authors.
IEEE Transactions on Biomedical Circuits and Systems | Year: 2013

In this work, a method of an inductive coupling impedance measurement (ICIM) is proposed for measuring the nerve impedance of a dorsal root ganglion (DRG) under PRF stimulation. ICIM provides a contactless interface for measuring the reflected impedance by an impedance analyzer with a low excitation voltage of 7 mV. The paper develops a calibration procedure involving a 50-Ω reference resistor to calibrate the reflected resistance for measuring resistance of the nerve in the test. A de-embedding technique to build the equivalent transformer circuit model for the ICIM circuit is also presented. A batteryless PRF stimulator with ICIM circuit demonstrated good accuracy for the acute measurement of DRG impedance both in situ and in vivo. Besides, an in vivo animal experiment was conducted to show that the effectiveness of pulsed radiofrequency (PRF) stimulation in relieving pain gradually declined as the impedance of the stimulated nerve increased. The experiment also revealed that the excitation voltage for measuring impedance below 25 mV can prevent the excitation of a nonlinear response of DRG. © 2007-2012 IEEE. Source


Chiu H.-W.,National Taipei University of Technology | Lu C.-C.,National Taipei University of Technology | Chuang J.-M.,National Taipei University of Technology | Lin W.-T.,National Taiwan University | And 3 more authors.
IEEE Transactions on Biomedical Circuits and Systems | Year: 2013

This paper presents the design flow of two high-efficiency class-E amplifiers for the implantable electrical stimulation system. The implantable stimulator is a high-Q class-E driver that delivers a sine-wave pulsed radiofrequency (PRF) stimulation, which was verified to have a superior efficacy in pain relief to a square wave. The proposed duty-cycle-controlled class-E PRF driver designed with a high-Q factor has two operational modes that are able to achieve 100% DC-AC conversion, and involves only one switched series inductor and an unchanged parallel capacitor. The measured output amplitude under low-voltage (LV) mode using a 22% duty cycle was 0.98 V with 91% efficiency, and under high-voltage (HV) mode using a 47% duty cycle was 2.95 V with 92% efficiency. These modes were inductively controlled by a duty-cycle detector, which can detect the duty-cycle modulated signal generated from the external complementary low-Q class-E power amplifier (PA). The design methodology of the low-Q inductive interface for a non-50% duty cycle is presented. The experimental results exhibits that the 1.5-V PA that consumes DC power of 14.21 mW was able to deliver a 2.9-V sine wave to a 500ω load. The optimal 60% drain efficiency of the system from the PA to the load was obtained at a 10-mm coupling distance. © 2007-2012 IEEE. Source


Huang C.-W.,Zhongxing Branch of Taipei City Hospital | Lee M.-A.,Zhongxing Branch of Taipei City Hospital | Lu R.-H.,Zhongxing Branch of Taipei City Hospital | Peng H.-C.,Zhongxing Branch of Taipei City Hospital | Chao H.-S.,Taipei Veterans General Hospital
Journal of Medical Microbiology | Year: 2011

Pulmonary aspergilloma and pulmonary actinomycosis are rare pulmonary infectious diseases. Clinical manifestations of pulmonary aspergilloma and pulmonary actinomycosis include chronic cough, fever, chest pain, haemoptysis and other pathologies, but some patients may be asymptomatic. We report a case of a healthy 33-year-old woman without any underlying diseases, who was admitted to Zhongxing Branch of Taipei City Hospital, Taiwan, for intermittent haemoptysis and right upper chest pain, which had persisted for several months. A chest radiograph revealed a focal consolidation in the right upper lobe (RUL) of the lung, which grew in size over time. A sputum study and bronchoscopy revealed no positive findings, although malignancy could not be ruled out. Thus, the patient received a wedge resection of the RUL lesion. Subsequent, pathological examination demonstrated the presence of pulmonary aspergilloma and pulmonary actinomycosis. The patient's symptoms resolved after resection of the RUL lesion. © 2011 SGM. Source

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