Search over 40,000 articles from the original, classic Encyclopedia Britannica, 11th Edition.
|
VARICOSE See also:VEINS (See also:Lat. varix, a dilated vein) , a See also:condition of the See also:veins which mostly occurs in those parts of the See also:blood-stream which are farthest from the See also:heart and occupy a de-pendent position . Thus they are found in the legs and thighs; in the lowest See also:part of the bowel (piles; see See also:HAEMORRHOIDS), and in the spermatic See also:cord (varicocele) . Any condition which hinders the return of blood from the veins is See also:apt to cause their permanent See also:dilatation; thus is explained the occurrence of varicose B B' veins in the See also:leg from the wearing of a tight garter, and of piles as the result of the pressure of an ovarian See also:tumour or of a pregnant uterus, or of disease of the See also:liver . Sometimes the trouble is begun by a See also:direct injury to the vein, which, by setting up an inflammation, weakens the coats of the vein, which then yield under the pressure of the blood-stream . In the See also:case of varicocele, the dilatation of the veins is probably of developmental origin; many other causes are given, but not one of them appears satisfactory . Examination of a varicose vein shows that it is increased in length as well as in capacity . In some parts of its course the vein has its coats much thickened, but at those places where there is most dilatation the walls are very thin . Veins thus affected give rise to pains and achings, and they are, moreover, liable to attacks of inflammation which end in clotting of the blood (thrombosis) . This is a dangerous condition, as a sudden or violent See also:movement is apt to cause the detachment of a piece of the See also:clot, which, carried up to the See also:brain or the See also:lung, may cause sudden See also:death . Less serious results of varicose veins are swelling of the parts below (oedema), ulceration and See also:abscess . As regards treatment, the wearing of a well-fitting elastic See also:stocking will prove beneficial in the case of a moderate dilatation of the veins of the leg; the individual must avoid See also:long See also:standing and fatigue . It is well also to have the See also:foot of the See also:bed raised three or four inches, so that during the See also:night the veins may be kept as empty as possible . If the case is more serious, the thinned veins threatening to give way, it will be advisable, provided the dilatations are fairly well localized, and the See also:general condition of the patient permits, to See also:excise the diseased parts, tying the cut ends of the veins, and closing the See also:surface wounds with See also:fine sutures . Should a varicose vein be plugged with clot, it will be advisable to tie it high up where the coats are healthy, and to remove the See also:lower part by See also:dissection . This will render the See also:person safe from the very serious See also:risk of a piece of the clot being carried to the heart, and will also permanently rid him of his trouble . It may be said generally that any operative treatment for varicose veins in the lower extremity is best associated with the application of a ligature upon the large surface vein just before it enters the See also:common femoral vein below the See also:fold of the See also:groin . This operation removes the risk of the downward pressure of blood in the veins whose dilatation has rendered the valves useless . In the case of a varicose vein being opened by See also:accident or disease, it is quite possible for the individual to bleed to death . The first-aid treatment for the serious See also:haemorrhage should consist in laying the patient on the See also:floor, raising the See also:limb upon the seat of a See also:chair, and fixing a See also:pad over the open See also:vessel by a handkerchief or bandage . Varicose veins of the spermatic cord (varicocele) of the See also:left See also:side are met with in adolescents . The dilatation is, in all See also:probability, of developmental origin, making its See also:appearance at See also:puberty . It is, as a See also:rule, of no serious moment, and, unless See also:present in an extreme degree, had best be treated merely by a suspension bandage . If, however, it is causing real See also:physical See also:distress, it may be treated by excision of an See also:inch or two of the bunch of dilated veins . The presence of varicocele is apt to cause inconvenience or even discomfort to men living in See also:India or the tropics, but the Englishman who intends spending his See also:life in temperate climes will do well to ignore a varicocele . It will become less and less noticeable as See also:time goes on . (E . |
|
|
[back] CALCULUS OF VARIATIONS |
[next] VARIOLITES (Lat. variola, smallpox) |
There are no comments yet for this article.
Do not copy, download, transfer, or otherwise replicate the site content in whole or in part.
Links to articles and home page are encouraged.