Obstetric Hooks 



585 



When a hook is used for the development of traction, when- 

 ever force is applied, the instrument must be constantly guarded 

 by the operator's hand lest it sHp or tear out and lacerate the 

 uterus. This applies with special force to the sharp hook. 



In the application of hooks, the operator should always aim to 

 select a point where the instrument will be secure against tear- 

 ing out, and in order to do this he needs have well in mind the 

 anatomical structure of the fetus and the resistance of various 

 parts. 



Fig. 93. Obstetric Forceps. 



a, Roeder's obstetric forceps for d, Moeller's bitch forceps. 



swine. 



b, Pig forceps. Walcb's. 



c, Obstetric forceps for swine and 



goats. Witt's. 



e, Ellinger's pig forceps. 



f, deBruin's forceps for sheep. 



g, deBruin's bitch forceps. 

 (Hauptner). 



Anteriorly the hooks may be inserted with comparative safety 

 in the orbits. The point of the hook should be sunk deeply into 

 the orbit and should force its way through the bony walls of that 

 cavity into the sinuses of the face. For this purpose the hook 

 should be about 3 inches in length. In correcting a slight devi- 

 ation of the head, it may be allowable at times to insert the hook 

 into the lower jaw between its two branches, but this constitutes 

 a very insecure hold, which will give way under very moderate 

 traction and consequently does not permit of great force. When 

 it is wished to apply severe traction to the lower jaw, the cord 

 should be used as already described. 



