In urology, the<unk>  is the creation of a passageway for urine or enema fluid that, by its (surgical) construction, has a valve mechanism to allow continence. Procedures which make use of the<unk> :<unk>  procedure *Malone antegrade continence enema *Monti procedure
Mitrofanoff principle
Goldwater rule
Wallace rule of nines
Arndt–Schulz rule
Westgard rules
Bell–Magendie law
Haber's rule
Köllner's rule