著者

尾家 重治 河合 伸也

出版者

一般社団法人日本医療機器学会

雑誌

医療機器学 (ISSN:18824978)

巻号頁・発行日

vol.92, no.1, pp.14-18, 2022 (Released:2022-04-05)

参考文献数

16

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The fabric structures of re-usable (cotton, polyurethane, polyester 95% with polyurethane 5%, polyester 95% with spandex 5%) face masks compared to disposable non-woven masks were observed under scanning electron microscopy. We found re-usable face masks in general have homogeneous pore sizes of approximately 0.1 - 0.5 mm. In comparison, non-woven masks have two fiber layers separated by one densely non-woven labyrinthine layer with disordered three dimensional microfibers. We found most (7 out of 8) non-woven masks shared this similar dense second layer composition. Our observation for masks under the electron microscopy provides structural evidence underlying infection-preventing superiority of non-woven over re-usable (cotton, polyurethane, polyester 95% with polyurethane 5%, polyester 95% with spandex 5%) face masks. Furthermore, we found that non-woven masks do not always have the disordered dense middle layer, which suggests that some products of non-woven masks may not provide equal protection for infection.

著者

尾家 重治 河合 伸也

出版者

一般社団法人 日本環境感染学会

雑誌

日本環境感染学会誌 (ISSN:1882532X)

巻号頁・発行日

vol.36, no.3, pp.157-160, 2021-05-25 (Released:2021-11-25)

参考文献数

4

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“除菌”,“アルコール”,“99.9%”などの表示から殺微生物効果を連想させる市販製品(環境用または環境・手指用)の殺細菌効果について,Enterococcus faecalisを用いて調べた.28製品中13製品(46.4%)が5分間の接触で殺細菌効果を示さなかった.これら28製品のうちのエタノールを含有する14製品(実測値で7.9~65.7 vol%のエタノールを含有)では,14製品中1製品(7.1%)が殺細菌効果を示さなかった.また,塩素系薬剤を含有する10製品(実測値で0.06~144 ppmの遊離残留塩素を含有)では,すべての製品(100%)が殺細菌効果を示さなかった.殺微生物効果を連想させる市販製品の半数近くが殺細菌効果を示さなかった.

著者

安部 幸雄 土井 一輝 酒井 和裕 深堀 勝之 藤井 裕之 河村 洋行 河合 伸也

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.43, no.3, pp.1020-1022, 1994-09-25 (Released:2010-02-25)

参考文献数

9

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Peripheral nerve trunks are not rigidly fixed to surrounding tissues along their course. They slide longitudinally in their beds over several millimeters with movements of the extremity. This concept of peripheral nerve excurisions helps to explain the pathophysiological events occurring in entrapment neuropathy, chronic nerve irritation and nerve compression. Although this is an important physiological phenomenon, this has not been examined precisely.We examined excursion of the normal sciatic nerves of 10 adult rabbits. The following were investigated:1) Percentage elongation of the sciatic nerve under nomal lower limb motion.2) Excursion between epineurium and gliding floor.3) Excursion between the funiculus.4) Morphological changes of the sciatic nerves under nomal lower limb motion.5) Microanatomical features of the peripheral nerves adapting movements of the extremity.The results were as follows:1) Total percentage elongation of the sciatic nerve was 5.8% in 0° flexion of the knee and 90° flexion of the hip joint. But near the knee joint, the maximum percentage was 9.2%.2) Excursion was found between the epineurium and gliding floor, and between the funiculus.3) It was proven that in the funiculus the nerve fibres have an undulating spiral pattern, which is, after its discoverer, called Fontana's bands. When the nerve was stretched in the course of movement, the undulation straightened out until it disappeared. Microanatomical view represents the wave-like alignment of the nerve fibres.By these features, peripheral nerves can accommodate limb motion.

著者

城戸 研二 河合 伸也 小田 裕胤 田口 敏彦 山縣 茂樹 秋野 龍明 村松 慶一

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.37, no.2, pp.675-677, 1988-10-25 (Released:2010-02-25)

参考文献数

4

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In thirty-six cases with lumlar diseases, CT studies of the shape of the lateral recess (L5) were performed. A series of CT scans at L5 lateral recess showed the narrowest level of it and the L5 neve root condition in it. Three types of the shape were classified, which were triangular type, trefoil type and flat trefoil type. Especially the flat trefoil type was associated with LCS. We concluded that the narrowest level of the lateral recess of LCS was the entrance of the nerve root, which was trapped there by the configuration of the recess with the degenerative soft tissue, on the other hand, the lateral recess of OA was not narrowest at the entrance level, but narrowest at the pedicle level. The difference in the shape contributed to the pathogenesis of symptoms of the LCS.

著者

木戸 健司 河合 伸也 小田 裕胤 石田 洋一郎 深堀 勝之 峯 孝友 日浦 泰博

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.38, no.1, pp.386-388, 1989-10-25 (Released:2010-02-25)

参考文献数

2

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The purpose of this paper is to report morphological features of the cells in the human posterior longitudinal ligament, including its attachment to the vertebral bodies, and of the cultured cells derived from PLL. We used the transmission electron microscopy to observe the cells. Far from its vertebral attachment, the main constituent cells in PLL are fibroblasts. The closer to the vertebral bodies fibroblasts become degenerative, and chondrocytes are observed in the irregular collagen fibers. The closer still more, calcium deposits on the collagen fibers, and osteocytes become the dominant cells. Compared with these three types of cells fibroblast, chondrocyte, and osteocyte in PLL, the cultured cells resemble fibroblasts.

著者

河合 伸也

出版者

医学書院

巻号頁・発行日

pp.1111-1113, 2002-09-25

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I.はじめに 運動器(筋骨格系)の重要性がようやく脚光を浴びる時代になりました.20世紀は『がんの10年』や『脳の10年』でしたが,21世紀は『運動器の10年』から始まります.運動器の障害・外傷は個人的・社会的損失が大きいだけでなく,運動器が高いQOLを保持する役割を担っているという観点から運動器が見直されています.この観点において運動器に関連する専門職(殊に,整形外科医)の役割は大きいものがあります.

著者

今釜 哲男 服部 奨 小山 正信 河合 伸也 東 良輝 繁冨 頼雄 小田 裕胤 井之川 義典 多原 哲治

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.27, no.4, pp.559-563, 1978-12-25 (Released:2010-02-25)

参考文献数

16

被引用文献数

1

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Vascular tests for thoracic outlet syndrome are considered to be one of the important diagnostic aid in order to determine the localization and the severity of neurovascular lesion at the thoracic outlet region. However, the mechanism and significance of vascular tests are still unclear.This is to report our clinical and autopsial study to try to clarify the exact meanings of each vascular test.Materials are 72 cases in 48 patients with thoracic outlet syndrome (46 cases in 39 patients recieved first rib resection) and 21 cases of exploration in autopsy.Positive Adson's test, although the incidence is quite low, may suggest severe lesion at the scalen triangle. Eden's test indicate lesions at the costo-clavicular space. In this positive the clavicle moves most to the posteromedial direction among the various positions. Abduction-external rotation test and Wright's test show neurovascular compression mainly at the costo-clavicular region and partly at the scalen triangle. These positions make the neurovascular bundle tracted foward the lateral. Compression at the subcoracoideal region is not the main cause in Wright's test.

著者

佐貫 浩一 松岡 彰 中村 克巳 中川 裕二 新庄 信英 国司 善彦 河合 伸也

出版者

West-Japanese Society of Orthopedics & Traumatology

雑誌

整形外科と災害外科 (ISSN:00371033)

巻号頁・発行日

vol.39, no.2, pp.517-518, 1990-10-25 (Released:2010-02-25)

参考文献数

5

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Pyarthrosis of the knee was treated in 11 patients by arthroscopic lavage and debridement. There were 4 men and 7 women patients whose ages raged from 8 months to 80 years. Staphylococcus aureus was cultured in 5 knees. Four patients were caused by the injection of steroids. There were no recurrences. Arthroscopy can aid in establishing the diagnosis and implementing the appropriate treatment when a septic knee is suspected.

著者

井上 博子 伊原 公一郎 後藤 能成 河合 伸也

出版者

中国・四国整形外科学会

雑誌

中国・四国整形外科学会雑誌 (ISSN:09152695)

巻号頁・発行日

vol.13, no.1, pp.69-73, 2001-04-20 (Released:2009-03-31)

参考文献数

10

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19 patients with intramuscular hemangioma (IMH) in the extremity have been treated at our institution over the last 15 years. The average age was 20 years (range, 1 to 70 years).Involved sites were the lower extremity in 12 patients, and the upper extremity in 7. The mean follow-up period was 5.1 years (range, 0.5 to 15 years). Longstanding pain and swelling were common symptoms. Plain X-ray showed phlebolith in 10 patients. Magnetic resonance imaging, 13 patients, delineated the extent of the lesions, and revealed characteristic structures within the tumors. These two imaging modalities were informative for diagnosis and surgical treatment planning. Angiography and compued tomography were less valuable, although they also showed the lesions to some extent. Diagnosis of IMH was obtained preoperatively in 8 patients, however, the remaining 11 patients needed open biopsy. Extirpation of the tumors was performed in 17 patients, one of whom also received radiotherapy. Of the remaining two patients, one receieved only radiotherapy. The other, tumor was left untreated, because it was too extensive to be excised without significant morbidity. These two patients, had no major disability at the latest follow-up. Local recurrence occurred in 2 of the 17 surgically-treated patients. Complete extripation is needed for local control of the disease, but feasibility of the surgery depends on the tumor's location and size. Low dose radiotherapy may be a useful alternative, when the lesion is extensive, and the symptoms warrants.