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Scientific Proceedings (67). 



the transposed ureter and therefore some impairment of ureteric 

 function was absolutely unavoidable. But making allowance for 

 this reduced prostaltic power by the least possible total ureteral 

 traumatization and by purposely confining the necessary handling 

 to the negligible caudad third, an effort has been made to balance 

 such impaired power by a physiologic load. To this end twenty 

 dogs have been operated upon by transplanting one ureter in 

 seven and both ureters in thirteen dogs. The results were as 

 follows: 



1. Direct uretero-sigmoidal entrance was found more obstruc- 

 tive than the oblique entrance. 



2. When ureteral dilatation occurred it appeared first in the 

 cephalad third of the ureter. This was associated in the animals 

 having greater caudad obstruction with dilatation of the second 

 or second and caudad thirds of the ureter and renal pelvis. 



3. Each of the seven dogs with singly transplanted ureters 

 showed hydronephrosis in some degree. The ureter in each case 

 had been made to enter the sigmoid directly or obliquely for not 

 over 0.5 cm. 



4. Of the thirteen with doubly transplanted ureters, three 

 showed cephalad ureteral dilatation only. These were dogs in 

 which the ureters traversed the sigmoidal wall for 1.5 cm. The 

 thirteenth dog with an intramural ureteral segment of 2 cm. on 

 one side and a direct entrance on the opposing side after seventeen 

 days of life, showed a normal kidney and ureter on the oblique and 

 a pyonephrosis on the direct side. 



2. Enteric Dilatation. 



A . Small Intestine. 



Fourteen animals have been incompletely obstructed about 

 the iliocecal region to determine a possible dynamic change in the 

 cephalad end of the small intestine. The conclusions have been 

 these: 



1. A fixed diameter of the caudad ileum of approximately 

 I cm. (incomplete obstruction) is followed in 5.8 days by a dilata- 

 tion of a duodenum of mean volume of 12.2 c.c. to a mean volume 

 of 19.2 c.c. 



