著者

Yusuke Endo Naoki Unno Naoto Yamamoto Masaki Sano Kazuto Katahashi Takafumi Kayama Yuta Yamanaka Hajime Tsuyuki Hiroya Takeuchi Kazunori Inuzuka

出版者

The Editorial Committee of Annals of Vascular Diseases

雑誌

Annals of Vascular Diseases (ISSN:1881641X)

巻号頁・発行日

vol.16, no.3, pp.200-204, 2023-09-25 (Released:2023-09-25)

参考文献数

20

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Objectives: We aimed to investigate the clinical features of upper extremity deep vein thrombosis (UEDVT).Methods: We retrospectively reviewed the background, thrombus site, treatment, and outcome of 76 UEDVT patients.Results: Of the 76 UEDVT patients, 44 (57.9%) were men, and 51 (67.1%) were complicated by malignancy, 44 (57.9%) had an indwelling central vein (CV) catheter, 8 (10.5%) had concomitant pulmonary embolization (PE), and 33 (43.3%) were symptomatic. Regarding the thrombus site, the right internal jugular vein was the most common, with 30 cases (35.3%). As regards the treatment method, 53 patients (69.7%) received oral anticoagulants. In 2015, when direct oral anticoagulants (DOACs) was covered by insurance, there were 44 UEDVT cases, of which 34 (77.3%) received DOACs. Outcomes at a mean observation period of 37.5±41.5 months included 40 deaths (52.6%) with a mean survival of 16.3±21.3 months. The most common cause of death was malignancy, with 33 cases (82.5%).Conclusion: In the background of UEDVT, the combination of indwelling CV catheter placement and malignancy was frequently observed. While the risk of recurrence or PE complications is low, the prognosis of UEDVT complicated by malignancy is extremely poor.

著者

Wataru Nakai Naoki Okada Masaki Sano Takeshi Nakatsuka

出版者

JAPAN SOCIETY OF TROPICAL ECOLOGY

雑誌

Tropics (ISSN:0917415X)

巻号頁・発行日

vol.27, no.2, pp.49-58, 2018 (Released:2018-09-01)

参考文献数

26

被引用文献数

9

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Radial variation of δ18O before and after cellulose extraction was assessed in Acacia auriculiformis, Eucalyptus camaldulensis, and Celtis timorensis growing in northeastern Thailand to examine the necessity of extracting α-cellulose to detect annual rings from trees without visible rings. Optimum sampling resolution to detect peaks in the radial variation of δ18O values was also examined. Cored samples were sectioned into 0.2mm thickness in the radial direction. Each circular section sliced from a wood core sample were divided along wood grain into two semicircular sections, both of which were located at the same radial and longitudinal positions, and were side-by-side tangentially. One half was used for bulk analysis and the other for extraction. Peak positions were assigned from the seasonal variation of δ18O. The δ18O values cyclically changed in both bulk wood and α-cellulose. The correlation coefficient between bulk wood and α-cellulose δ18O was high in every species, and the offset was almost constant across the radial position. The mean cycle length of one sample was longer than those of the other two samples, although annual increment based on dendrometer monitoring was smaller than those of the other two samples. That is, the seasonal variation in δ18O values recorded in the xylem was not completely detected because of low amplitude or insufficient radial resolution. Therefore, we concluded that α-cellulose extraction is unnecessary for annual ring detection. It is necessary to determine an appropriate sampling resolution based on growth rate for effective peak detection.