Abstract
Respiratory kymographic investigations in 87 acute abdominal cases and 30 normal controls are described. The value of recording the diaphragmatic and costal movements in both ordinary and deep respiration is pointed out. A plateau-shaped diaphragmatic wave with reduced amplitude forms a means of estimating the severity of an abdominal process, of its localization, and of differentiating between abdominal and thoracic conditions.

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