中間気管支幹に発生した気管支平滑筋腫の1切除例

Leiomyoma of the trachea and bronchus is a rare tumor. Only 45 cases have been reported in the Japanese literature. We report here a case of leiomyoma of the intermediate bronchus which was successfully operated on. A 45-year-old man suffered from a repeated episode of pneumonia in the right lower lobe. Bronchoscopy revealed a polypoid mass on the intermediate bronchus. The diagnosis of leiomyoma was made by bronchoscopic biopsy. Sleeve resection of the intermediate bronchus including the tumor and end-to-end anastomosis was performed. His postoperative course was uneventful and bronchoscopic findings showed clear healing of the anastomotic site. The resected specimen contained a tumor with smooth surface having protrusion into the bronchial lumen with 6 x 5 x 4 mm in size. The final pathological diagnosis was leiomyoma of the intermediate bronchus with no evidence of malignancy

Does Selective Posterior Tibial Slope Technique in Cruciate-Retaining Total Knee Arthroplasty Result in the Elimination of Posterior Cruciate Ligament Management?

In cruciate-retaining total knee arthroplasty (CR-TKA), intraoperative posterior cruciate ligament (PCL) management is necessary because retention of optimum PCL tension with high reproducibility is difficult. If PCL management is not performed appropriately, problems such as postoperative pain, poor range of motion, and a feeling of instability may occur. The posterior tibial slope (PTS) has a major influence on the tension of the PCL in CR-TKA. Changes in femoral posterior condylar offset also influences PCL tension in CR-TKA. We designed a surgical procedure in which the PTS is adjusted in association with the posterior condylar offset during surgery. The postoperative clinical results of the primary total knee arthroplasty 159 knee performed by this procedure were favorable. In addition, none of the knees required management of PCL. In our procedure, PCL management, which is the main problem in CR-TKA, is not necessary, and this may be the main advantage of the new procedure

Imidazolium-Based Anion Exchange Membranes for Alkaline Anion Fuel Cells: Interplay between Morphology and Anion Transport Behavior

We studied anion transport behaviors in grafted anion exchange membranes (AEMs) composed of 2-methyl-N-vinylimidazole (Im) and styrene (St) having various Im/St ratios (6/4, 4/6, and 3/7) grafted onto poly(ethylene-co-tetrafluoroethylene) films (named AEM64, AEM46, and AEM37). The transport properties were evaluated based on the transport efficiency defined as ratios of anion diffusion coefficients in AEMs to dilution solutions (D/D0) and were correlated to the morphology of AEMs analyzed by the small angle scattering method. We found a master curve of D/D0 with hydration for AEM64, regardless of the grafting degree and anion species; however, D/D0 for AEM46 and AEM37 was similar with AEM64 at low hydration conditions, but clearly deviated down from it at high hydration conditions. Such difference could be elucidated by the membrane morphology. For AEM64, the conducting phase was homogeneous comprised dispersed ions, and the conductivity correlated well with the increasing hydration. In contrast, when the styrene content increased (i.e., AEM46 and AEM37), the conducting phase changed to heterogeneous with water puddles separated from dispersed ions, and the anion transport was suppressed. Results in this work gave a mechanistic insight in the anion transport properties in proximity of the AEM morphology at various hydration conditions

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identifier:oai:t2r2.star.titech.ac.jp:5012832