A system of surgery . ig. 153.—A, Transverse Section of first part of Subclavianwhen collapsed ; b, the same under a Pressure of240 min. of Hg; c, Transverse Section of collapsedsuperficial Femoral Artery ; d, the same Artery underthe Pressure of 240 mm. Hg. (Ballance and Edmunds.) LIGATURE OF AN ARTERY. 531 result may follow too rapid absorp-tion of the ligature. While ad-mitting the justice of these objec-tions, they do not appear to out-weigh the important advantage ofsafety against haemorrhage, and thebalance of evidence is, therefore,decidedly in favour of applying liga-tures to arteries
A system of surgery . ig. 153.—A, Transverse Section of first part of Subclavianwhen collapsed ; b, the same under a Pressure of240 min. of Hg; c, Transverse Section of collapsedsuperficial Femoral Artery ; d, the same Artery underthe Pressure of 240 mm. Hg. (Ballance and Edmunds.) LIGATURE OF AN ARTERY. 531 result may follow too rapid absorp-tion of the ligature. While ad-mitting the justice of these objec-tions, they do not appear to out-weigh the important advantage ofsafety against haemorrhage, and thebalance of evidence is, therefore,decidedly in favour of applying liga-tures to arteries in continuity with-out division of their inner this method should beused in all cases, it is of especialvalue and importance where theligature has to be applied near alarge branch or to a diseased form of ligature, no doubt,requires greater care than the othermethod; but this is no argumentagainst its employment. The liga-ture should be one of the less ab-sorbable forms—silk or tendon—. _*—- , V-^SS- Fig. 154.—Transverse Section of superficialFemoral Artery (x 100), showing thethickness of the ihree coats. (Ballanceand Edmunds.) 1, Outer; 2, middle; and 3. inner coat. Theouter coat is much thicker than in otherlarge arteries. -? ? -??: ?- ?? . J - ?:?-?:--- f. 155.—Transverse Section of theCommon Carotid Artery (x 190),showing the thickness of the threecoats. (Ballance and Edmunds.)1, Outer; 2, middle and a, inner coat. and, of course, it should be carefullyprepared to render it aseptic, andevery pains taken to secure primaryaseptic healing of the wound. It must be remembered that thearterial walls are much thinnerduring life when exposed to thenormal blood pressure than they arewhen empty and collapsed afterdeath. The wavy outline of theelastic membrane of Henle is en-tirely due to this shrinking of theempty vessel, and is lost when theartery is distended by the and Edmunds found thatthe thickness of the common carotidarter
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