By Lattimer R
ISBN-10: 0203428005
ISBN-13: 9780203428009
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Damage to puborectalis results in incontinence. The anorectal angle may function as a flap valve so that an increase in intra-abdominal pressure results in compression of the anterior rectal wall into the upper anal canal, thus occluding its lumen. 3. Intact rectal and anal sensation. Distension of the rectum with faeces results in a sensation of filling which is an additional factor in continence. The receptors for this reflex are located in the musculature of the pelvic floor and also probably in the rectal wall itself.
364). ANEURYSMS Nick Wilson An aneurysm is a localized dilatation of an artery. Cardiac and venous aneurysms are also described but will not be discussed. The significance of aneurysms lies in their tendency to rupture, thrombose or give rise to emboli. Terminology A true aneurysm involves all layers of the arterial wall and may be fusiform or saccular whilst a false aneurysm is formed by the compression of surrounding structures of an artery by blood escaping from a defect in its wall. Dissection of an aneurysm occurs when blood enters a tear in the diseased intima tracking down the wall splitting the media.
364). ANEURYSMS Nick Wilson An aneurysm is a localized dilatation of an artery. Cardiac and venous aneurysms are also described but will not be discussed. The significance of aneurysms lies in their tendency to rupture, thrombose or give rise to emboli. Terminology A true aneurysm involves all layers of the arterial wall and may be fusiform or saccular whilst a false aneurysm is formed by the compression of surrounding structures of an artery by blood escaping from a defect in its wall. Dissection of an aneurysm occurs when blood enters a tear in the diseased intima tracking down the wall splitting the media.
Key Topics in General Surgery by Lattimer R
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