Given an abstract of a paper, generate a title for this paper such that conveys the key focus of the paper.

Abstract: The incidence of air under the diaphragm in CAPD patients is very low, and causes directly attributable to standard CAPD techniques are even lower. Bowel perforation generally causes a larger volume of air collection under the diaphragm.
Is air under the diaphragm a significant finding in CAPD patients?