68o Veterinary Obstetrics 



evacuation of the uterine cavity, but this does not seem to be 

 entirely reliable. According to Fleming it has certain dangers, 

 especially that of metritis as a result of the shock. 



e. Dislodgementof Corpus Luteum. Hess, page 227, claims that 

 the safest and best way to induce artificial abortion in the cow is by 

 dislodging the corpus luteum by compression and then applying 

 massage to the gravid uterus from before backward. In his 

 hands this plan of inducing expulsive contractions of the uterus 

 has proven highly efficient. 



3. Overcoming Dvstokia duk to Pelvic Constriction. 



When gestation has passed unheeded until the time for 

 parturition has arrived, and the veterinary obstetri.st faces a 

 case of dystokia due to pelvic constriction, various plans for the 

 removal of the fetus present themselves. 



a. Forced Extraction. First to be considered as affecting 

 the lives of both mother and fetus is that of forced extrac- 

 tion through the narrowed canal. If in the judgment of the 

 veterinarian it is practicable to force the fetus through the 

 canal without serious injury to the mother, this should be done. 

 If forced extraction is decided upon, the operator should proper- 

 ly secure the presenting parts, thoroughly lubricate the passages 

 by means of a warm lysol solution, or otherwise, and proceed 

 with the extraction under the general rules on page 5S6. 



If the fetus has already become advanced in the pelvic canal 

 and is firmly impacted, it is difficult to do otherwise than to 

 attempt the completion of delivery by means of traction. The 

 fact that it has been forced along the passage for a considerable 

 distance should be considered evidence that it may be com- 

 pletely extracted without very great danger. 



b. Embryotomy may be po.ssible in the larger animals, but 

 is not available in the smaller ones. We have already described, 

 on page 641, the technic for carrying out embryotomy operations. 



e. Caesarian Section. Finally, when other means for saving 

 the life of the mother or fetus or both are excluded or 

 rendered very doubtful by the conditions which are present, 

 hysterotomy should be employed, under the general plan which 

 has been suggested on page 663. 



This constitutes the most promising method for overcoming 



