Ano-rectal Suppuration, Study Guides, Projects, Research of Medical Sciences

Download Ano-rectal Suppuration and more Study Guides, Projects, Research Medical Sciences in PDF only on Docsity! Ano-rectal Suppuration * Definition: Infection in the ano-rectal spaces. * Aetiology: A) Predisposing factors: 1. Infected anal gland is the commonest cause (90%). 2.Lack of personal hygiene. 3.Infected hair follicle, sebaceous cyst, perianal haematoma, or fissure. 4. Injection treatment of piles. 5. Spread of a pelvic infection eg. Appendicitis , salpingitis ...etc 6.On top of anal fistula — recurrent ano-retal suppurations. 7.Rarely inflammatory bowel disease, T.B. & anorectal carcinoma. Terminal radicles of sup. Anal column of lorgagni Upper 1/2 endodermal in origin. | _——Anal sinus _—— Anal valve of Ball Anal ervnt Pectinate line —Anal aland & duct Transtional zone ___Internal rectal venous (or pectin) plexus —White line il White line of Hilton = —_=™}_, <——White line of Hilton Lowermost part -—€xternal rectal venous plexus lined bv skin = Longitudinal section in the Anal canal showina its mucous memhrane (M M ) Inf rectal vein Ano-rectal Suppuration B) Organism: staph. aureus, B. Coli, B. proteus, strept ... etc. C) Route of infection: 1. Usually infection spread from the lumen of the anal canal or the rectum. 2. Spread may occur from near by infected organ. * Pathology: The infection starts in the ana/ crypts > anal gland — intersphincteric plane where an abscess is formed — this abscess spread in various directions producing: Longitudinal m. Pelvirectal space abscess internal sphincter m. Intersphincteric space abscess: Levator ani m. External sphincter m. Ischiorectal fossa Perianal space abscess abscess * Ano-Rectal Abscess * Pelvi-Rectal Drainage Ischio-Rectal Perianal