The dispersive determination of $pi{Y}Sigma$ coupling constants ($Y = Lambda, Sigma$) and the implications for low-energy $bar{K}N$ analysis are discussed. (Presented by G. Violini at the 7th Int. Symp. on Meson-Nucleon Physics and the Structure of the Nucleon, MENU 97, Vancouver, B.C., July 28th - August 1st, 1977).