Gastrointestinal physiology has had several topics that have perennial interest, including this update on a method for defining the integrity and functional status of the vagus nerve(s). The current report on PP is welcome for several reasons, including the opportunity to consider aspects of vagus nerve function as a topic for the clinical laboratory. The functional integrity of vagus nerves, the immediate focus of investigation, is a question that may arise in postoperative patients who are experiencing digestive tract difficulty; the putative explanation that "damaged vagus nerves" are responsible should be carefully considered, however, as this study indicates.
Donahue PE. A Safe and Noninvasive Test for Vagal Integrity Revisited—Invited Critique. Arch Surg. 2002;137(8):959. doi:10.1001/archsurg.137.8.959