A new technique for diagnostic peritoneal lavage.

Because of the unique anatomic relationships present in the umbilical ring, peritoneal lavage puncture is recommended at this site, Lacking in subcutaneous fat, adherent to peritoneum, the umbilical ring appears well suited for lavage puncture. As a locus of entry, it eliminates the necessity to incise down to the peritoneum and obviates the usage of epinephrine. Entry into the peritoneal cavity is enhanced by the intimate relationship between skin and peritoneum. Finally, the strength of the inferior portion of the ring, resulting from the fibrosis and scarring of the urachus and both umbilical arteries, vitiates the potential of postpuncture umbilical hernia.