264 PBINOIPLES OF VETEBINABY SUEGERY 



Aneurism. 



What is an aneurism ? 



It is a pulsating tumor containing blood, -which, com- 

 municates with the interior of an artery. 



Classify aneurisms. 



Idiopathic, traumatic. 



How do you divide iodiopathic aneu/risms ? 

 Cirsoid, tubular, sacculated, dissecting. 



W hat is cirsoid aneurism 9 



This is really no aneurism at all, but a neof ormation, a 

 blood tumor. The vessel is tortuous. The shape of the blood, 

 tumor is irregular, compressible, pulsating and bluish, involv- 

 ing, as a rule, a number of arteries held together by connec- 

 tive tissue. 



What is a tubular aneu/rism f 



It is an elongated dilatation of an artery involving all 

 three coats of the artery. 



What is a sacculated aneu/rism ? 



Consists of a pouch-like dilatation, springing from the- 

 side of an artery. 



How do you subdivide a sacculated aneu/rism, ? 

 Into a true and false aneurism. 



What do you understand by a true and false aneu/rism ? 



In the true sacculated aneurism, all three coats of the 

 artery are distended and form the sac. In the false aneurism: 

 the wall of the pouch is practically made up of the adventitia 

 only, which has undergone connective tissue proliferation. 



