The haemodynamic assessment of the patients is a daily activity in paediatric intensive care unit. It completes and is guided by the clinical examination. The will to develop the least invasive possible coverage of the patients is a constant concern. The haemodynamic monitoring, all the more if it is invasive, ceaselessly has to put in balance the profit and the risk of beginning this technique at a fragile patient. In the last three decades, numerous non-invasive haemodynamic tools were developed. The ideal one must be reliable, reproducible, with a time of fast, easily useful answer, with a total harmlessness, cheap and allowing a monitoring continues. Among all the existing tools (oesophageal Doppler ultrasound method, transthoracic echocardiography, NICO, thoracic impedancemetry, plethysmography, sublingual capnography), no one allies all these qualities. We can consider that the transthoracic echocardiography gets closer to most of these objectives. We shall blame it for its cost and for the fact that it is an intermittent monitoring but both in the diagnosis and in the survey, it has no equal among the non-invasive tools of haemodynamic assessment from part the quality and the quantity of the obtained information. The learning of the basic functions (contractility evaluation, cardiac output, cardiac and the vascular filling) useful for the start of a treatment is relatively well-to-do. We shall miss the absence of training in this tool in France in its paediatric and neonatal specificity within the university or interuniversity framework.
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