We have been using Onyx, a non-adhesive liquid polymer, to treat cerebral AVMs endovascularly since 1999. During this time we have treated 45 consecutive, unselected patients. From the outset this product brought about a change in our approach to treating this type of lesion because of the different injection behaviour observed for this material compared with the adhesive Histoacryl that had been employed until then. The object of this article is to assess the results achieved by our team using this new embolic agent, following angiographic and clinical follow-up of cases for a minimum of six months and a maximum of five years (mean: two years). We propose new categories of cerebral AVM based on the expected behaviour of Onyx within the nidus. Our appraisal indicates that we have improved our angiographic results, achieving complete occlusion of the malformation in 22% of cases and over 80-% closure in 69% of cases. The morbimortality rate for the procedure was 18%.

Palliative embolization of renal cell carcinomas is a safe therapeutic method to treat advanced renal cell carcinomas allowing control of symptoms such as hematuria and flank pain in more than 90 % of our cases. Preoperative embolization yields a patient survival time comparable to that of patients at earlier tumor stages and is dependent on the metastases.

Brain arteriovenous malformations (BAVM) are congenital vascular lesions consisting of direct arterial to venous connection without a capillary network. They occur in 0.1% of the population, most commonly in the supratentorial region. Aneurysm, intracranial hemorrhage and stroke are the major complications. We present 2 cases two cases of high grade incidental BAVM. A thorough evaluation of the lesion and the risks of surgical intervention determine the appropriate management.

From a case study in a research project dedicated to the problems of Archeology of identity in an area of historic border with the city of Buenos Aires, current the San Vicente Partido, we explores the practices of donation and conservation of objects. It has been conducted the survey in the Sanvicentine Cultural Museum, located in the city of San Vicente, head of eponymous partido, of all those considered to be antiques, either by its historical or archaeological value, as well as others who are placed there as an ornaments. This survey was also complemented by documentation of diverse nature and carrying out an anthropological interview to one of the neighbors who, with a small group, takes care of the museum and its attendance sporadically. The information exposed allows us to understand some of the main characteristics of the aforementioned practices, not only in this type of museums, but also in the setting-up of private collections such as the one that gave rise to this particular museum. Finally, we discuss the implications that these objects had and still have in the construction of identities in this type of social contexts.

Hyperkalemia is a common and potential life-threatening electrolyte disorder in patients presenting to the emergency setting. It is known that renal insufficiency may abate the toxic effects of hyperkalemia on electrocardiographic abnormality formation. Herein, I have reported a case of severe hyperkalemia associated with renal insufficiency in a woman patient that presented to the emergency department with weakness and hypotension. Initial electrocardiogram showed accelerated AV junctional rhythm. Incipient treatment for hyperkalemia was begun and afterwards hemodialysis was performed for patient. Then, electrocardiogram was repeated that primary changes were removed and vital sign was stable. Eventually, it is better that hemodialysis starts from commencement for patients with life-threatening severe hyperkalemia associated with acute or chronic renal failure.