As an aid to the diagnosis of pathologic changes within the peritoneum, the use of pneumoperitoneum seems to have established itself on a fairly firm basis. With increased experience and opportunity for observation, the scope of this method is constantly enlarging. In this report I shall call attention to the assistance offered by the use of pneumoperitoneum in some of the various forms of abdominal hernia: (1) in visualizing the contents of the hernia sac, showing the reducibility, the presence of adhesions, the position of the ring, etc., and (2) in demonstrating the patency of the processus vaginalis peritonaei in persons in whom a hernia cannot be diagnosed clinically, although a so-called "potential" hernia exists.
In all the various forms of hernia it would at least be a source of satisfaction to know beforehand what tissues the sac contains, whether or not its contents are adherent, and the approximate size
FARR RE. PNEUMOPERITONEUM AS AN AID IN DIAGNOSIS OF HERNIA. JAMA. 1924;82(22):1774–1775. doi:10.1001/jama.1924.02650480030012
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