Toyohiro Hirai
Kyoto University
371 Papers
1.1K Citations
Toyohiro Hirai is an academic researcher from Kyoto University. The author has contributed to research in topics: Medicine & COPD. The author has an hindex of 39, co-authored 257 publications. Previous affiliations of Toyohiro Hirai include Nagasaki University & Japanese Ministry of Health, Labour and Welfare.
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Papers
Seasonal variation in nocturnal home blood pressure fall: the Nagahama study.
Yasuharu Tabara,Takeshi Matsumoto,Kimihiko Murase,Shunsuke Nagashima,Toyohiro Hirai,Shinji Kosugi,Takeo Nakayama,Tomoko Wakamura,Kazuo Chin,Fumihiko Matsuda +9 more
TL;DR: The seasonality of circadian BP variation, as well as the factors associated with this seasonality, in a large-scale general population is clarified in a cross-sectional study based on multiday BP values measured in the evening, during sleep, and in the morning.
Stronger associations of centrilobular than paraseptal emphysema with longitudinal changes in diffusing capacity and mortality in COPD.
Yusuke Shiraishi,Naoya Tanabe,Kaoruko Shimizu,Akira Oguma,Hiroshi Shima,Ryo Sakamoto,Hajime Yamazaki,Tsuyoshi Oguma,Atsuyasu Sato,Masaru Suzuki,Hironi Makita,Shigeo Muro,Masaharu Nishimura,Susumu Sato,Satoshi Konno,Toyohiro Hirai +15 more
TL;DR: In this article , the diffusing capacity and transfer coefficient of the lung for carbon monoxide (Dlco and KCO) and FEV1 were evaluated at least annually over a 5-year period.
Variation in information needs of patients with interstitial lung disease and their family caregivers according to long-term oxygen therapy: a descriptive study
Ryuhei Sato,Tomohiro Handa,Kiminobu Tanizawa,Toyohiro Hirai +3 more
TL;DR: The information needs of patients and their family caregivers were not the same and that the aspect of information needs differed by long-term oxygen therapy status, and healthcare providers should consider the position of the recipient of information.
Lung volume measurement using chest CT in COVID-19 patients: a cohort study in Japan
Shiro Otake,Yusuke Shiraishi,Shotaro Chubachi,Naoya Tanabe,Tomoki Maetani,Takanori Asakura,H. Namkoong,Takashi Shimada,Shuhei Azekawa,Kensuke Nakagawara,Hiromu Tanaka,Takahiro Fukushima,Mayuko Watase,Hideki Terai,Mamoru Sasaki,Soichiro Ueda,Yukari Kato,Norihiro Harada,Shoji Suzuki,Shuichi Yoshida,Hiroki Tateno,Yoshitake Yamada,Masahiro Jinzaki,Toyohiro Hirai,Yukinori Okada,Ryuji Koike,Makoto Ishii,Naoki Hasegawa,Akinori Kimura,Seiya Imoto,Satoru Miyano,Seishi Ogawa,Takanori Kanai,Koichi Fukunaga +33 more
TL;DR: Lower CT lung volume was associated with critical outcomes, posthospitalisation complications and slower improvement of clinical conditions in COVID-19 patients.
Body mass index in male patients with COPD: correlation with low attenuation areas on CT
Emiko Ogawa,Yasutaka Nakano,Tadashi Ohara,Shigeo Muro,Toyohiro Hirai,Susumu Sato,Hiroaki Sakai,Mitsuhiro Tsukino,Daisuke Kinose,Michiyoshi Nishioka,Akio Niimi,Kazuo Chin,Peter D. Paré,Michiaki Mishima +13 more
TL;DR: A low BMI is associated with the presence of emphysema, but not with airway wall thickening, in male smokers who have COPD, which support the concept of different COPD phenotypes and suggest that there may be different systemic manifestations of these phenotypes.