a fixed Dynamic viscosity for Air, Water and Barium Sulphate,
only 3 measurements are done in calculation of Flow Index in
Mean Intrarectal pressure during defecation as measured using
computerized anorectal manometry.
A.C. Length .
2 and 3 are measured in cm. from the lateral defecographic views
on a standard abdominal film.
flow index of 1cc/s. was taken as well as a cut off point between
obstructed defecation (flow < 1cc/s.) and unobstructed flow
in the absence of anatomical obstruction or excessively hard
stools during defecation.