POLL EVIL OPERATION 35 



patient's safety demands that tracheotomy be performed in 

 almost all cases before any operation is begun upon the 

 septum nasi or turbinated bones. After tracheotomy, 

 anaesthesia may be maintained by means of an ordinary 

 funnel with its tube bent at right angles and inserted into 

 the trachea tube while the chloroform is dropped on a towel 

 spread over the "funnel mouth. After completing any 

 required operation upon the septum, turbinated bones or 

 other parts, hemorrhage may be controlled by packing one 

 or both nasal fossae with single strips of gauze of sufficient 

 size and carefully securing them by sutures to the sides of 

 the trephine wound or otherwise. 



7. POLL EVIL OPERATION 

 Fig. 11 



Instruments. Clipping shears, razor, sharp scalpels, one 

 dozen compression artery forceps, probe-pointed bistoury, 

 probe, Luer's bone forceps, bone gouge, curette, suture and 

 dressing material. 



Technic. Clip the foretop and mane and shave the fore- 

 head and the top of the neck, back to a distance of 8 or lo 

 cm. or as much farther as may be required to pass beyond 

 and behind the supposed extension of disease, and disinfect 

 the area. Confine the animalin lateral decubitis preferably 

 upon the operating table, place under complete anaesthesia 

 and remove the halter or other headgear. 



With sharp scalpel make a longitudinal incision on the 

 median line of the head and neck beginning at a point pre- 

 sumably posterior to the diseased area and carry it over 

 the poll down onto the forehead for a distance of 4 or 5 cm. 

 below the foretop. Continue this incision through the skm, 

 the subcutem, the adipose tissue, AT, Fig. 11, and either 

 through or passing around alongside the neck hgament, 



