. Diseases of the rectum and anus: designed for students and practitioners of medicine. ept at the extremities, wherethey diverge slightly. The length of the fixed anal rectum is variable with astate of activity or passivity, and in a state of activity thereare variations in its length of at least one inch ( centi-meters) between a contracted uplifted pelvic floor and that ofa depressed floor with anal eversion. (Martin.) The canal is surrounded by the hemorrhoidal plexus. Themost painful affections of the ano-rectal region occur usuallyin the anal canal, and the accompanying pain is due t
. Diseases of the rectum and anus: designed for students and practitioners of medicine. ept at the extremities, wherethey diverge slightly. The length of the fixed anal rectum is variable with astate of activity or passivity, and in a state of activity thereare variations in its length of at least one inch ( centi-meters) between a contracted uplifted pelvic floor and that ofa depressed floor with anal eversion. (Martin.) The canal is surrounded by the hemorrhoidal plexus. Themost painful affections of the ano-rectal region occur usuallyin the anal canal, and the accompanying pain is due to thecontraction of the surrounding muscles and to the generousdistribution of nerves in these parts. This portion of the rec-tum never contains feces except during defecation. Peritoneal Coat.—At its commencement the rectum is gen-erally surrounded by peritoneum, which binds it to the sacrum(Fig. 4); lower down it covers the anterior surface only, andis then reflected on to the bladder, forming the recto-vesicalpouch (Plate II), or to the uterus (Douglass cul-de-sac). The PLMTE n. RBctum InJBctEd with Paraffin, showing Positian af Sigmoid and Relation of thsPBritaneum to the Sacrum, Rsctum, and Bladder [Stick in Bladder]. ANATOMY AND PHYSIOLOGY H uterus and vagina are interposed between it and the bladderin the female. The peritoneum may extend down to within aninch ( centimeters) of the prostate; the distance is liableto variations, depending on the age of the subject and the dis-tension of neighboring organs. In the newborn it may extendto within half an inch ( centimeters) of the anus. The dis-tance increases after the fifth year; in old age with enlargedprostate the peritoneum is found higher up. The distance fromthe anus to the lower portion of the peritoneal fold has beena subject of much controversy both at home and abroad. The
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectanusdis, bookyear1910
