磁性微球的磁响应性及狗肾动脉栓塞实验研究

研究了磁性明胶微球(MG-ms)的磁响应性及狗肾动脉栓塞效果。磁响应性实验表明,介质流速越慢,磁场强度越大,磁性微球中磁铁粒子含量越高,越容易定位磁性微球。狗肾动脉灌注10～30um磁性微球,血管造影和病理切片结果表明:磁性微球在外磁场作用下可以进一步栓塞至肾小球、肾脏的微细动脉,而且栓塞均匀、完全,而不加磁场时栓塞不完全。这些结果提示磁性明胶微球可以作为治疗肾癌的栓塞剂,将有利于增强化疗效果、减少毒副反应。     

Percutaneous embolization of bony pelvic neoplasms with tissue adhesive

Eight patients with tumors of the bony pelvis underwent embolization with isobutyl-2-cyanoacrylate (IBCA). Five patients had primary bone tumors, of which 2 were malignant and 3 were benign; 3 patients had metastases to the bony pelvis from the thyroid gland, kidney, and femur, respectively. Embolization was performed to minimize blood loss during resection of a giant-cell tumor in one patient and insertion of a hip prosthesis in another who had metastatic renal carcinoma. It was also done prior to scheduled surgery in one of the patients with aneurysmal bone cyst, but healing was sufficient to cancel the operation; in the other patient, embolization was the only therapy. Palliative embolization was performed in 4 patients with malignant tumors after other means failed to control pain or slow progression. IBCA appears to be an efficient means of occluding the vessels feeding selected primary bone tumors and metastases.