Acute negative-pressure hydrocephalus: Management algorithm and value of early endoscopic ventriculostomy. / Hidrocefalia aguda a presión negativa: propuesta de manejo y valor de la ventriculostomía temprana.

INTRODUCTION: Acute negative-pressure hydrocephalus is an uncommon, underrecognized patology with a high morbidity and mortality. We propose an algorithm to facilitate the management of these patients, promoting the early diagnosis and the use of endoscopic third ventriculostomy as initial therapeutic option. MATERIAL AND METHODS: We performed an observational retrospective study in which patients diagnosed with acute negative-pressure hydrocephalus were included. Patient age and symptoms, primary etiology of hydrocephalus, previous shunt, infection and surgical procedures, time from clinical deterioration to endoscopic procedure, definitive treatment and patient outcomes were recorded. Our management algortihm is exposed and justified. RESULTS: We identified 5patients with diagnosis of acute negative-pressure hydrcephalus. In 4 of them the management algorithm was applied and early diagnosis and endoscopic ventriculostomy were performed. We observed complete succes of the endoscopic procedure in 2 patients (50%); the other 2required permanent shunt, nevertheless resolution of the low-pressure state was achieved. One patient died after systemic infection (20%), 80% of the patients experienced good outcome. CONCLUSIONS: The early identification of a negative-pressure hydrocephalic state is essential to reduce complications. Application of a specific management algortihm and early endoscopic third ventriculostomy could be advantageous to achieve better outcomes.