Related Experiment Video
Updated: Aug 7, 2026

Anogenital Distance and Perineal Measurements of the Pelvic Organ Prolapse (POP) Quantification System
Published on: September 20, 2018
Anorectal pressure in patients with symptomatic hemorrhoids
This study was carried out on 30 patients with symptomatic internal hemorrhoids and 20 normal controls. The anal sphincter pressure was studied before and after surgery. A significantly high anal pressure was found in all patients with symptomatic internal hemorrhoids, when compared with normal controls, and there was no relation between this increase and the degree of hemorrhoids. One week following surgery, this high pressure was reduced significantly and was not affected by the type of operation. Thus, this increase in resting anal pressure is due to an overactivity of the internal hemorrhoids, which is secondary to the presence of the hemorrhoidal mass.
This study was carried out on 30 patients with symptomatic internal hemorrhoids and 20 normal controls. The anal sphincter pressure was studied before and after surgery. A significantly high anal pressure was found in all patients with symptomatic internal hemorrhoids, when compared with normal controls, and there was no relation between this increase and the degree of hemorrhoids. One week following surgery, this high pressure was reduced significantly and was not affected by the type of operation. Thus, this increase in resting anal pressure is due to an overactivity of the internal hemorrhoids, which is secondary to the presence of the hemorrhoidal mass.
More Related Videos
Related Concept Videos
Drugs for Treatment of Diarrhea-Predominant IBS
Two specific drugs used in the treatment are alosetron (Lotronex) and eluxadoline (Viberzi). Alosetron, a 5-HT3 antagonist, works by slowing the movement of stools in the gut, reducing bowel...
Drugs for Treatment of Constipation-Predominant IBS
Assessment of the Rectum and Anus
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
Inflammatory Bowel Disease V: Surgical Management
Here are some common surgical interventions for IBD:
Intestinal Obstruction II: Pathophysiology
Diverticular Disease of the Colon

