Modern surgery, general and operative . re instances congeni-tal, but they are most often seen in the aged, and usually are first observedbetween the ages of twenty and forty. They are more common in womenthan in men, owing, it is believed, to the influence of pregnancy. Varix of the spermatic cord is known as varicocele. It is apt to appearabout the time of puberty, and most adult men have at least a slight varico-cele. Varix is more likely to appear in the left spermatic vein than in thevein of the right side, because the left spermatic vein has no valves (see page1400). Varicose tumors of t
Modern surgery, general and operative . re instances congeni-tal, but they are most often seen in the aged, and usually are first observedbetween the ages of twenty and forty. They are more common in womenthan in men, owing, it is believed, to the influence of pregnancy. Varix of the spermatic cord is known as varicocele. It is apt to appearabout the time of puberty, and most adult men have at least a slight varico-cele. Varix is more likely to appear in the left spermatic vein than in thevein of the right side, because the left spermatic vein has no valves (see page1400). Varicose tumors of the rectum constitute hemorrhoids or piles. Pilesare caused by obstruction to the upward flow in the hemorrhoidal veins,either by obstructive liver disease, enlargement of the uterus or prostate, orthe presence in the rectum of fecal masses in a person habitually constipated(see page 1177). A vein under pressure may dilate more at one spot than at another, thedistention being greatest back of a valve or near the mouth of a tributar>^. Varicose veins. 412 Diseases and Injuries of the Heart and Vessels The valves become incompetent and the dilatation becomes still has pointed out that varix of the lower extremity is apt to beginwhere the deep vessels join the superficial veins. At this point Treves saysthree forces meet: the blood column above, the valve below, and the force of theblood-current. At the spot where the pressure is greatest the vein wall dilates,and from this dilatation the blood-current is deflected and causes another dila-tation higher up and on the opposite side of the vessel. The blood is againdeflected and causes another dilatation, and so on. The vein wall maybecome fibrous, but usually it is thin and sometimes it ruptures. The veinsnot only dilate, but they also become longer, and hence do not remain straight,but twist and assume a characteristic form. It seems probable that thefirst step in the process is a growth of new venous tissue (A.
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Keywords: ., bookcentury1900, bookdecade1910, bookpublishe, booksubjectsurgery
