DOUGLASS' POUCH CYST 117 



the standing position, with a rope adjusted above both 

 hocks to prevent the veterinarian from being kicked 

 when the trocar is thrust into the cyst. 



After having copiously anointed the anus and rec- 

 tum with a lubricant, such as vaseline or lard, the 

 trocar and canula guarded in the hand is passed into 

 the rectum. The point of the trocar is set at a place 

 about one inch higher than the normal floor of the 

 rectum, directing it towards the cow's sternum, and 

 plunging it into the cyst with one thrust to the depth 

 of two or three inches. 



The trocar is drawn out of the canula as soon as 

 the cow has ceased struggling. The cyst contents 

 spurt through the canula immediately and into the 

 rectum as long as the veterinarian protects the mouth 

 of the canula with his hand. Wheii he withdraws his 

 hand the rectal folds either envelop the mouth of the 

 canula and shut off the flow, or under the influence 

 ot the rectal tenesmus the canula is pushed too far 

 into the cyst. To obviate this we slip the rubber tub- 

 ing over the end of the canula after withdrawing the 

 trocar, leaving one end hanging out of the rectum. 



When the fluid begins to run out more slowly pres- 

 sure exerted on the cyst, with one hand in the rectum 

 and the other in the vagina, is applied with success 

 in entirely emptying the cyst. The canula is then with- 

 drawn with a quick jerk. 



No further attention need be given the case. Relief 

 is instantaneous and lasting. The animal begins to 

 eat and is entirely normal at once, unless the case 

 had been neglected; when it may be necessary to ad- 

 minister a laxative to overcome constipation which 

 has developed. 



In our experience one thorough draining is all that 

 is necessary; the cyst does not. become distended with 

 fluid a second time. 



