210 BOVINE OBSTETBICS 



method. Binz also mentions it in his obstetrical work, 1830, 

 page 136. In cases where cartilaginous-like degeneration or 

 extensive cicatricial tissue close the cervix uteri, an unfavor- 

 able prognosis must be given. I am of the opinion that the 

 good results of many operators are partly due to the fact, that 

 in those cases where operative interference was practiced, just 

 as good results would have been obtained by a bloodless 

 mechanical dilatation. The operation is performed as follows : 

 The vagina is prepared by rinsing it with a 2 per cent, creolin 

 solution ; the hind legs of the cow are tied to prevent kicking 

 the operator. It is preferable to operate the cow standing. 

 Some prefer the recumbent position, as the os uteri is pushed 

 further back and the operation is actually performed in the 

 vagina ; nevertheless, the standing posture is best. 



The bloody operation is executed by introducing a probe- 

 pointed bistoury with the cutting edge upward as far as 

 possible into the cervical canal. By pulling it backward and 

 forward, the upper wall is incised. This is accompanied by a 

 crackling sound. • The incision penetrates the circular layer 

 and is sufficiently deep when all resistance is overcome. Be- 

 sides the upper incision, two lateral ones obliquely upward are 

 made. 



It is not necessary to make more than three incisions. 

 The parts are next explored to see whether the incisions 

 extend sufficiently; when necessary, they are made longer. 

 Should, as a result of violent pains, the os uteri protrude at the 

 vulva, the sliding bistoury may be used. A very good instru- 

 ment is also the adjustable herniotome. The hemorrhage 

 during and after the operation is trifling. 



Further dilatation is effected by boring movements of the 

 hand and fingers. Now patience becomes a virtue, and me- 

 chanical dilatation is left to the water-bag. It is faulty to draw 

 head and fore legs into the pelvic canal and exert traction im- 

 mediately after the operation, as it may result in ruptures by 

 which the abdominal cavity is opened. It is much better to 

 wait for some time after the operation to apply but limited 

 traction. 



