Anorectal manometric study with balloon method was performed in healthy adults and patients with anal diseases, and their resting pressure and rhythmical activity were studied.
The results obtained are the following.
1) In healthy adults, the resting pressures were lowered with their years, and its tendency was remarkable in 5 to 6 decade of ages.
Their rhythmical activities were 14.1 cycles/min. and 11.3 cycles/min. in distal and proximal canals respectively, and "ultra slow wave " was observed in 6.5 % of the control subjects.
2) The resting pressure in patients with first or second-degree haemorrhoids or with fissures was significantly higher than that of control subjects, but it was lower in patients with third-degree haemorrhoids.
" Ultra slow wave " was seen in 50 % of haemorrhoids and 80 % of fissure patients respectively. 3) High anal pressure and "ultra slow wave" were not observed after the operation when the postoperative courses were uneventful.
4) Thus, it is concluded that manometric study in patients with anal disease is useful for consideration of their causes and surgical treatments and also applicable for the assessment of their postoperative course.
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