when subjects increased intra-abdominal pressure rectal pressure was significantly higher in patients with non-prolapsing haemorrhoids than in normal subjects ( 157 ( 10 ) versus 105 ( 15 ) cmh2o ; p less than 0.05 ) , but not in patients with prolapsing haemorrhoids ( 126 ( 14 ) cmh2o ) .
C0034888
prolapsing haemorrhoids
C0033377
prolapsing