The patient should be encouraged to wait at least 15 minutes in order that peristalsis can reach the full length of the rectum .
Many will find this impossible and this treatment should therefore be applied only when the facilities to evacuate are nearby .
The patient should be encouraged to wait at least 15 minutes in order that peristalsis can reach the full length of the rectum , but many will find this impossible and this treatment should therefore be applied only when the facilities to evacuate are nearby .