Synopsis:In order to develop a compact cryogen-free 4.7-T (200 MHz) NMR magnet, we investigated methods of obtaining a homogeneous magnetic field distribution inside REBCO bulks. In this study we successfully fabricated large single-domain annular GdBCO bulk superconductors 60 mm in diameter and up to 60 mm thick. We also fabricated a large EuBCO bulk 60 mm in diameter, and evaluated the performance of these annular bulks in terms of the NMR magnet. It was found that enhancing J c -B, increasing bulk thickness and employing an Eu element showing low magnetic permeability were effective in increasing the homogeneity of the magnetic field distribution. Furthermore, it was confirmed that a homogeneous area of magnetic distribution was obtained even at a higher field magnetization of 7 T (300 MHz) at 40 K for stacked GdBCO bulk superconductors 60 mm in diameter and 60 mm thick. Finally, several issues relating to further increasing the trapped magnetic field were discussed.

However, there have been reports that stent-graft limbs with an expanded polytetrafluoroethylene (ePTFE) graft surrounded by a helical stent structure perform better than those with polyester surrounded by a Z-stent with unsupported gaps when deployed in the EIA. 6,7 L imb occlusion is the third most common etiology for reintervention after endovascular aneurysm repair (EVAR), with a reported incidence between 2.6% and 7.4%, 1,2 and the risk sharply increases when the stent-graft limb is deployed in the external iliac artery (EIA). Stent-graft limb deployment in the common iliac artery (CIA) reports an incidence of limb occlusion between 1.0%

In almost every type of artificial valve, structural failure has been described. We are reporting on a case of a sudden leaflet escape of an Edwards TEKNA mitral valve prosthesis 12 years after implantation. The patient had a sudden onset of dyspnea and severe pulmonary edema with subsequent cardiogenic shock. An emergency mitral replacement was successfully performed. A multi-detector computed tomography scanning and three-dimensional imaging showed two fragments that had embolized in the terminal aorta and the left common iliac artery. The patient presented visual field abnormality, and postoperative head computed tomography showed watershed cerebral infarction. The escaped leaflet that fractured transversely was removed, following the patient's recovery, during cardiac surgery.

We report a case of venous stasis ulcer that recurred after the administration of bevacizumab (Bmab), with some literature review. The patient was a 60-year-old woman who underwent endovenous thermal ablation of the right great saphenous vein indicated for refractory stasis dermatitis due to varicose veins of the right lower extremity. She also underwent sclerotherapy of varicose veins of the lower leg in another hospital four years earlier. After the surgery, the patient wore elastic stockings, and the venous insufficiency of the right lower leg was maintained at stage C5 of the CEAP classification. She later received chemotherapy for lung metastasis of colon cancer using a protocol containing Bmab. One month after the onset of the chemotherapy, a recurrence of an ulcer in the right lower limb was observed.The patient was then referred to our hospital for better management. Bmab was discontinued and a surgical treatment for varicose vein dysfunctions of the lower extremities by endovenous thermal ablation of the remaining great saphenous vein and subfascial endoscopic perforator surgery of the incompetent perforating veins was performed. The ulcer healed six months after the surgery, and no recurrence was observed.

Objectives: Ablation is a treatment modality involving the destruction of diseased tissue through direct contact or direct energy absorption. This comparative experimental study aimed to understand the differences between 2 types of ablation, continuous and intermittent ablation. Methods: Using albumen and agar as media, we compared medium denaturation and temperature, respectively, between the continuous wave (continuous ablation) and pulse (intermit-