[Polysomnography and other sleep studies].

Additional tests are needed for an accurate diagnosis of most sleep disorders in children. Of these additional tests, especially when study of sleep breathing disorders in children is required, complete overnight polysomnography is currently considered the gold standard for the diagnosis of sleep disorders. There are, however, other simplified tests, although less informative and reliable, which may be acceptable diagnostic alternatives, such as respiratory polygraphy and pulse oximetry recording. This article will explain the main indications, methodology and advantages and disadvantages of the various sleep tests.