Acute negative intracranial hypotension may cause bradycardia, epidural hematomas, and hemodynamic collapse. Subgaleal drains should not be connected to suction systems, and care should be taken when these drains are connected to vacuum bulbs in high-risk cases such as after cranial irradiation, large resections, and mesh cranioplasties.

The division of labor among nations is that some specialize in winning and others in losing. Our part of the world, known today as Latin America, was precocious: it has specialized in losing ever since those remote times when Renaissance Europeans ventured across the ocean and buried their teeth in the throats of the Indian civilizations. Centuries passed, and Latin America perfected its role. We are no longer in the era of marvels when fact surpassed fable and imagination was shamed by the trophies of conquest-the lodes of gold, the mountains of silver. But our region still works as a menial. It continues to exist at the service of others' needs, as a source and reserve of oil and iron, of copper and meat, of fruit and coffee, the raw materials and foods destined for rich countries which profit more from consuming them than Latin America does from producing them. The taxes collected by the buyers. are much higher than the prices received by the sellers; and after all, as Alliance for Progress coordinator Covey T. Olive/;" said in July 1968, to speak of fair prices is a "medieval" concept, for we are in the era of free trade.

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