aspiration of the Stomach of horses 



413 



of the opposition the prolonged sojourn of a speculum al- 

 ways provokes. 



The tube, previously well oiled, is held in the left hand 

 about fourteen inches from its end and passed into the lower 

 commissure of the left nostril. As the end approaches the 

 anterior, extremity of the inferior turbinated bone it is de- 

 pressed with the index finger of the right hand to direct its 

 course into the inferior meatus. Should it deflect upward 

 into the middle meatus it will pass over the .posterior nares 

 instead of into the pharynx, and will be blocked completely 



Fig. 207 — A, Tube Passed in the Middle Nasal Meatus is Seen Blocked by 



the Ethmoid Bone. B, Tube Passed into Inferior Meatus Deflects 



Downward into the Pharynx and Backward toward the 



CEsophageal Infundibulum. 



agaipst further progress. The precaution to pass the tube 

 into the inferior meatus is the first important step of the 

 procedure. As it passes through the nasal chamber all force 

 is avoided and injury from a sudden jerk of the head is pre- 

 vented by holding the head firm. When the tube has reached 

 the middle of the pharynx, indicated by the sixteen-inch 

 mark on its surface, the fingers of the right hand are placed 

 against the throat while the left grasps the tube four inches 

 from the nostril. In this position an act of deglutition is 

 patiently waited for. It may come almost as soon as the 

 end of the tube enters the pharynx, or some moments may 



