Intrarectal pressures are measured manometrically in K.Pascal
where 100 mmHg = 13.3 Kpa.
Length and Diameter are measured from the lateral defecographic
views in Meters.
Viscosity of Bowel Gas, liquid stools and soft well formed stools
were approximated to that of :
Air = 0.00001905 Kg m -1 s -1.,
Water= 0.000723 Kg m -1 s -1
Barium Sulphate Paste = 0.0013092 Kg m -1 s -1., respectively