Kazuya Matsumoto

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We analyzed the effects of age and sex on habitual sleep/wake rhythm and Morningness-Eveningness scores of 2,252 subjects (6-89 years) randomly selected in Shimonoseki, Japan. Subjects were divided into 21 age groups with a matching number of men and women in each age group. The most common sleep parameter patterns by age showed a v- or inverted v-pattern(More)
To understand the sleep-wake behaviours from the fifth pre-partum week to the 15th post-partum week by the number of actigraphic activities and sleep logs were evaluated in 10 women. It was found that total sleep time shortened, sleep efficiency decreased, and wake after sleep onset (WASO) increased in the weeks immediately after delivery. Compared with(More)
BACKGROUND Transurethral resection of bladder tumor (TURBT) technique has been considered the routine method for removing most bladder tumors for decades. In contrast, endoscopic submucosal dissection (ESD) is the gold-standard treatment for gastrointestinal superficial tumors. We investigated the effectiveness and applicability of a new technique for en(More)
Sleep patterns during saturation dives equivalent to a 30-m depth (pressurized condition) and habitation in a confined environment at 1 atm absolute pressure (non-pressurized condition) were studied to determine the effects of environmental pressure. Eight inexperienced divers experienced the pressurized condition of the saturation dives, and nine healthy(More)
Pancreatic cancer is the fifth leading cause of cancer death and has the lowest survival rate of any solid cancer. Endoscopic ultrasound-guided fine-needle aspiration biopsy (EUS-FNA) is currently capable of providing a cytopathological diagnosis of pancreatic malignancies with a higher diagnostic power, with a sensitivity and specificity of 85%-89% and(More)
BACKGROUND AND STUDY AIMS Specimens collected by fine needle are microscopic and contain blood; therefore, the presence of a target specimen within a sample is often difficult to confirm. Although rapid on-site evaluation (ROSE) during endoscopic ultrasound-guided fine needle aspiration biopsy (EUS-FNA) is beneficial, many health care facilities are unable(More)
BACKGROUND AND AIM Pancreatic juice cytology (PJC) is considered optimal for differentially diagnosing pancreatic masses, but the accuracy of PJC ranges from 46.7% to 93.0%. The aim of this study was to evaluate the clinical impact of measuring the KL-6 concentration of pancreatic juice for diagnosing pancreatic masses. METHODS PJC and the KL-6(More)
A 23-year-old woman with hemifacial microsomia type IIB was treated by simultaneous mandibular and maxillary distraction. During the course of the distraction, cephalometric analysis showed that the maxilla was not moving downward and that the upper edge of the mandibular condyle was moving upward into the space between the condyle and the glenoid fossa.(More)
This study assessed the effect of a nitrogen-oxygen (N2-02) saturation diving environment on nocturnal sleep and the differences in sleep on diving depth. We measured and recorded the standard polysomnograph and heart rate for a total of 459 nights on 27 divers who performed the N2-O2 saturation simulation dive an 20- and 30-m equivalent depths as well as(More)
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