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The percutaneous placement of ventriculo-atrial (V-A) shunts for treatment of hydrocephalus has been previously reported by several authors as a simplified procedure. However, this technique did not avoid the use of a distal connector between the outlet catheter and the atrial one, which may lead to a disconnection. A technique of percutaneous V-A shunt insertion using a split sheath is described and illustrated with a series of 22 patients. The use of a split sheath eliminates any distal connector thus avoiding the risk of shunt disconnection and reducing the operating time. The average operating time was 31 min. This rapid procedure allowed us to operate on two of our patients under local anaesthesia. The correct placement of the atrial catheter tip was performed under fluoroscopic control and always confirmed by postoperative radiographs. Two incidents of carotid artery puncture were controlled by simple local compression without further consequences. The mean follow-up time is one year. All the patients' clinical conditions improved. We are encouraged to use this V-A technique more frequently as a method of choice in the treatment of adult hydrocephalus or when the peritoneal cavity is inaccessible in children. The use of a split sheath is successful in reducing the operating time and avoiding the use of a distal connector.

General and local health situation analyses have increasingly become a political issue with implications for the population under study and for decision makers, as it involves the spheres of power, and entails economic, social and cultural responsibilities.As an essential function of public health, health situation analysis has assessment parameters that make it possible to direct its development and measure its implications. This is where the first challenge lies. However, the most important ones go beyond the technical criteria established in the year 2000 by the Pan American Health Organization.The local dynamics where health situation analyses are inscribed, are increasingly more influenced by globalization processes, which in turn demand that international policies be articulated in our country, as is the case with the Sustainable Development Goals. Moreover, the demographic and epidemiological transition requires accounting for heterogeneous profiles including mental, occupational and environmental health.In addition, complexity increases in a context like ours, with deep inequalities that should be addressed within the framework of the Social Security System, which imply challenges in terms of knowledge, technical aspects, articulation, context, coherence, and policies.

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