Fecoflowmetry: a new parameter assessing rectal function.

Fecoflowmetry is a new technique by which the fecal flow rate is studied through recorded curves representing the changes which occur in the rate against time. Fecal flow rate is the product of rectal detrusor action against outlet resistance. The technique was performed on 36 normal volunteers and 8 chronically constipated patients. A one liter water enema was given to the individual. On feeling the desire to defecate, he or she was placed on the commode of a fecoflowmeter and was asked to defecate. Defecation flow curves were obtained. Evaluation of the curve comprises reporting on the defecated volume, flow time, maximum and mean flow rates and the shape of the curve. The technique was developed to stimulate natural defecation. It provides quantitative and qualitative data concerning the act of defecation. It assesses all objective parameters in one test. The procedure is simple, non-invasive and constitutes a useful screening tool in defecation and rectal disorders.