Transplantation of Devitalized Arterial Segments, i i i 



tation of a formalized segment in the abdominal aorta of a dog-. 

 The animal had normal pulsation in the femoral arteries and was 

 otherwise doing well with the exception of a subcutaneous infec- 

 tion of the abdominal wound. On May 18, we gave the animal 

 anesthesia in order to dress the wound, and it died in a few hours 

 apparently from the influence of ether. 



The specimen of the aorta presents a very interesting condition. 

 The distal part of the segment is free from thrombus, the anasto- 

 mosis is perfect, in the proximal portion there is a large thin parietal 

 thrombus covering the suture line, and also a small gangrenous 

 part of the segment. 



Our research is not yet concluded, but the results obtained 

 present some points of theoretical importance. 



For ten days the circulating blood was passing through a dead 

 canal over one inch long, and it remained fluid. It seems, then, 

 that blood need not necessarily run through a vessel lined with an 

 unimpaired endothelium in order to remain fluid. 



The implantation of devitalized segments is technically a great 

 deal more difficult than that of living ones. If the implanted seg- 

 ment is of the same size as the rest of the artery then the anasto- 

 mosis is easy to perform but as soon as the clamps are removed 

 both the afferent and the efferent parts of the artery become wider 

 than the implanted segment and the result is thrombosis. In order 

 that the size of the segment should correspond after implantation 

 to the rest of the artery, we have to use a segment wider than the 

 rest of the artery and this increases the technical difficulty. 



67 (323) 



A study of nitrogen metabolism in a case presenting short 

 paroxysms of fever of unknown origin. 



By THEODORE 0. JANEWAY and HERMAN 0. MOSENTHAL 



[From the Laboratory of Biological Chemistry of Columbia Univer- 

 sity, at the College of Physicians and Surgeons.'] 



The patient upon whom these studies were made presented an 

 unusual paroxysmal syndrome probably toxemic in origin, charac- 

 terized by attacks of prostration, pain — chiefly abdominal — fever, 

 tachycardia and polynuclear leucocytosis, with some nausea and 



