Yoshikazu Tsuruta

Learn More
In Japan, the population of patients on peritoneal dialysis (PD) is <4% of the total number of patients with end-stage renal disease. Few systemic analyses have examined why the number of PD patients has not increased in Japan. We organized a registry to analyze PD patients and retrospectively investigated 561 PD patients (about 5% of all Japanese PD(More)
Early withdrawal within 3 years after starting peritoneal dialysis (PD) and PD-related peritonitis have been major obstacles preventing increases in the population of PD patients. To address these problems, we implemented education programs for medical staff. This study analyzed the recent status and outcomes of PD therapy, focusing on findings such as the(More)
Background. 5-Methyl-1-phenyl-2-(1H)-pyridone (pirfenidone [PD]) has anti-fibrotic and anti-inflammatory effects. Previous reports have indicated that PD can prevent the progression of chronic kidney fibrosis in some animal models. It has not yet been reported, however, whether PD is capable of controlling acute inflammation of the kidney. Methods. The(More)
Background. The aim of the present study was twofold: (1) to confirm gas chromatography/mass spectrometry (GS/MS) as a means of measuring blood and urine concentrations of dimethyl sulfoxide (DMSO) and its metabolite, dimethyl sulfone (DMSO2), and (2) to measure blood concentrations of DMSO and DMSO2 in a hemodialysis (HD) patient receiving DMSO. Methods.(More)
A new circuit geometry SAZZ (snubber assisted zero voltage and zero current transition) is presented. It has the solution to supersede the conventional hard switched DC-DC converter currently in use for an electric vehicle (EV) drive application because of the simplicity and efficiency. Through the discussion of the circuit geometry, the operation principle(More)
In the past, we have proposed a high frequency, high efficiency and high power chopper based on new soft switching topology SAZZ (Snubber Assisted Zero Voltage and Zero Current Transition chopper) for FCEV application. We studied the effectiveness of the SAZZ method by simulation and by experiment. This time we concentrated on digital control of SAZZ(More)
The paper reports on formation of soft switching conditions in SAZZ converter topology. Abbreviation SAZZ represents snubber assisted zero voltage and zero current transition converter. In [2,3,4,5] high efficiency around 98% was reported for 100 kHz and 50 kHz converter with output power of 8 kW and 25 kW respectively. However, extreme changes of duty(More)
  • 1