. Modern surgery, general and operative. Fig. 219.—Radial pulse-tracings in aneurysm of right brachial artery: i, Left radial pulse; 2,right radial pulse (after Mahomed). feeling of beating and the discovery of the lump are the first intimations thatanything is wrong. An oval or globular, soft, elastic, and pulsatile protrusiondevelops in the line of an artery. It is usually quite evident to the touch thatthe sac contains fluid, but sometimes in old aneurysms the sac feels firm or. Fig. 220.—X-ray of aneurysm of thoracic aorta. even hard, because of the deposit of fibrin upon its inner surface
. Modern surgery, general and operative. Fig. 219.—Radial pulse-tracings in aneurysm of right brachial artery: i, Left radial pulse; 2,right radial pulse (after Mahomed). feeling of beating and the discovery of the lump are the first intimations thatanything is wrong. An oval or globular, soft, elastic, and pulsatile protrusiondevelops in the line of an artery. It is usually quite evident to the touch thatthe sac contains fluid, but sometimes in old aneurysms the sac feels firm or. Fig. 220.—X-ray of aneurysm of thoracic aorta. even hard, because of the deposit of fibrin upon its inner surface. In a par-tially consolidated aneurysm pulsation may be slight or even protrusion instantly ceases to pulsate and almost disappears on makingfirm pressure on the artery above. On relaxing the pressure the pulsatileenlargement at once reappears. Direct pressure upon the tumor may cause 478 Diseases and Injuries of the Heart and Vessels it to almost disappear. Pressure upon the artery below causes the tumorto enlarge. The pulsation is expansile—that is, the sac expands in all direc-tions during every cardiac contraction—and if an index-finger be laid on eachside of the tumor so that the points nearly touch, each pulsation not only Uftsthe fingers, but it also separates them. It is important to remember that alarge intrathoracic aneurysm which is in contact with the chest may not exhibitexpansile pulsation, but simply transmit pulsation from the blood-
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