INTRA-TRACHEAL IRRIGATION. 75 



15. INTRA-TRACHEAL IRRIGATION. 



Objects. The washing of irritant or septic substances 

 from, and the disinfection of, the trachea and bronchi. 



Instruments. Same as for tracheotomy, and a gravity 

 irrigating apparatus fitted with 3 m. of rubber tubing about 

 I cm. in diameter, 5 liters of .6 percent, soda chloride solu- 

 tion at a temperature of 37 to 39'' C. 



Technic. Operate on the standing animal. Perform 

 tracheotomy. Elevate the gravity apparatus containing the 

 irrigating fluid i to 2 m. above the patient, have the 

 animal's head slightly elevated, insert the free end of the 

 rubber hose in the trachea tube and let the fluid flow into 

 the trachea in a moderate stream until it is filled and the 

 animal makes expulsive efforts, when the inflow is stopped 

 and the animal permitted to lower his head and expel the 

 fluid, then raise the head again and repeat until the fluid is 

 expelled clear. Repeat the operation according to require- 

 ment. In cases of suppurative bronchitis, peroxide of 

 hydrogen may be added to the solution, 



16. INTRAVENOUS INJECTION. 

 Fig. 3. 



Instruments. Scissors, hypodermic syringe. 



Technic. The operation is performed on the standing 

 animal on either jugular vein at about the juncture of the 

 upper and middle thirds of the neck ; to most operators the 

 right jugular is the more convenient. /At the place desig- 

 nated the subscapulo-hyoideus musble lies between the 

 jugular vein and the carotid artery. After clipping the hair, 

 the skin should be carefully disinfected. The vein lies in 

 the jugular groove between the mastoido-humeralis and the 

 sterno-maxillaris muscles covered only by the skin and skin 

 muscle. Stand by the shoulder of the horse and compress 

 the jugular with the thumb as shown in Figure 3 or with the 



