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Negative Pressure Pulmonary Edema Associated with Anterior Cervical Spine Surgery
Hideki Shigematsu,Masana Yoneda,Yasuhito Tanaka 대한척추외과학회 2014 Asian Spine Journal Vol.8 No.6
We report a very rare case of negative pressure pulmonary edema (NPPE) that occurred immediately after anterior cervical discectomy and fusion (ACDF). The patient was a 25-year-old man who sustained a facet fracture–dislocation of C5 during a traffic accident. After ACDF, he developed NPPE and needed mechanical ventilation. Fortunately, he recovered fully within 24 hours. NPPE is a rare postoperative complication that may occur after cervical spine surgery. The aims of this report are to present information regarding the diagnosis and emergent treatment of NPPE, and to review the previous literature regarding this serious complication.
Hideki Kumagai,Koji Yokoyama,Tomoyuki Imagawa,Shun Inoue,Janyerkye Tulyeu,Mamoru Tanaka,Takanori Yamagata 대한소아소화기영양학회 2016 Pediatric gastroenterology, hepatology & nutrition Vol.19 No.3
Fecal microbiota transplantation (FMT) is a treatment designed to correct gut dysbiosis by administration of feces from a healthy volunteer. It is still unclear whether FMT for children with ulcerative colitis (UC) is effective or hazardous. Here we describe a young patient to have received FMT for UC. A three-year-old girl was admitted to our hospital with severe active UC, and treated with aminosalicylates and various immunosuppressive drugs. As remission was not achieved, we decided to try FMT before colectomy. We administered donor fecal material a total of six times by retention enema (×2) and via a nasoduodenal tube (×4) within 10 days. The patient developed abdominal pain and pyrexia after each FMT session. Analyses revealed the transferred donor fecal microbiota had not been retained by the patient, who ultimately underwent colectomy. The severity of the UC and/or timing of FMT may have partly accounted for the poor outcome.
Effect of Prostaglandin $E_1$ on Cutaneous Microcirculation of Flap or Replantation
Nakanishi, Hideki,Hashimoto, Ichiro,Tanaka, Shinji The Korean Society for Microsurgery 1997 Archives of reconstructive microsurgery Vol.6 No.1
Recently prostaglandin $E_1(PGE_1)$ has been shown to ensure flap survival by producing vasodilation of the peripheral vessels and platelet disaggreation. However, direct observation and detailed quantitative studies of the effects of $PGE_1$ on the cutaneous microcirculation have not been reported. In the present study, we investigated cutaneous microcirculatory changes in the rabbit ear chamber(REC) with an intravital microscope following intravenous administration of $PGE_1$. The results obtained in this study indicate that $PGE_1$ administered intravenously at a rate of 200ng/kg/min might act directly on the vessels and cause dilatation of metarterioles and capillaries without affecting vasomotion and systemic blood pressure. Clinically in order to evaluate the effect of an intravenous administration of $PGE_1$ on the cutaneous microcirculation, cutaneous blood flow, skin temperature and transcutaneous $Po_2$ in the pedicle or free flap of operated patients were evaluated by the combination of several measurements following the administration of $PGE_1$. The present study suggests that improvement of cutaneous microcirculation by $PGE_1$ may enhance the survival rate of flap or replantation. Both vessel arterial ischemia and venous congestion are main factors of tissue necrosis in the flap surgery. Vasodilatory or antithrombotic agents have been used in salvage of flap necrosis. However, the therapeutic effects of those drugs are still not well elucidated. Recently prostaglandin $E_1(PGE_1)$ has been shown to ensure flap survival by producing vasodilatation of the peripheral vessels and platelet disaggregation[1-3]. Emerson and sykes[4] have obtained significant improvement in the flap survival in the rat using $PGI_2$. Suzuki et al.[5] have reported prolonged flap survival length by using $PGE_1$ in the rabbit and concluded that $PGE_1$ improved the microcircuration in the flap. However, direct observation and detailed quantitative studies of the effects of $PGE_1$ on the cutaneous microcirculation have not been reported. In the present study, we investigated microcirculatory changes in the rabbit ear chamber[6,7] with an intravital microscope following intravenous administration of $PGE_1$.
Synthesis of TiCx Powder via the Underwater Explosion of an Explosive
Shigeru Tanaka,Ivan Bataev,Hideki Hamashima,Akihiko Tsurui,Kazuyuki Hokamoto 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.6
In this study, a novel approach to the explosive synthesis of titanium carbide (TiC) is discussed. Nonstoichiometric TiCxpowder was produced via the underwater explosion of a Ti powder encapsulated within a spherical explosive charge. Theexplosion process, bubble formation, and synthesis process were visualized using high-speed camera imaging. It was concludedthat synthesis occurred within the detonation gas during the first expansion/contraction cycle of the bubble, whichwas accompanied by a strong emission of light. The recovered powders were studied using scanning electron microscopyand X-ray diffraction. Submicron particles were generated during the explosion. An increase in the carbon content of thestarting powder resulted in an increase in the carbon content of the final product. No oxide byproducts were observed withinthe recovered powders.
Kumagai, Hideki,Yokoyama, Koji,Imagawa, Tomoyuki,Inoue, Shun,Tulyeu, Janyerkye,Tanaka, Mamoru,Yamagata, Takanori The Korean Society of Pediatric Gastroenterology 2016 Pediatric gastroenterology, hepatology & nutrition Vol.19 No.3
Fecal microbiota transplantation (FMT) is a treatment designed to correct gut dysbiosis by administration of feces from a healthy volunteer. It is still unclear whether FMT for children with ulcerative colitis (UC) is effective or hazardous. Here we describe a young patient to have received FMT for UC. A three-year-old girl was admitted to our hospital with severe active UC, and treated with aminosalicylates and various immunosuppressive drugs. As remission was not achieved, we decided to try FMT before colectomy. We administered donor fecal material a total of six times by retention enema (${\times}2$) and via a nasoduodenal tube (${\times}4$) within 10 days. The patient developed abdominal pain and pyrexia after each FMT session. Analyses revealed the transferred donor fecal microbiota had not been retained by the patient, who ultimately underwent colectomy. The severity of the UC and/or timing of FMT may have partly accounted for the poor outcome.