PRINCIPLES OF VETERINARY SURGERY 



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tated by its use. The application of setons to the shoulder, 

 the lancing of a cold abscess of the mastoido-humeralis and 

 even castration, can often be performed with no other 

 form of restraint. In most of the operations its application 

 should precede all other methods of restraint. Before the 

 single side line is applied preparatory to an operation in the 

 standing position, or while the casting harness is being ar- 

 ranged, the twitch should already have been adjusted to 

 the nose in every case. 



The twitch is particularly effectual in preventing re- 

 sistance of trivial manipulations, such as paring a hoof, clip- 



FiG. 28. 

 Hoodwink. 



ping the hair, washing a wound, arranging the casting 

 harness, etc. ; but it is also effectual against the infliction of 

 severe pain, especially if not of long duration. 



The twitch should be no less than three feet long, and 

 the loop no more than four to five inches in diameter, so 

 that one or two twists will be sufficient to tighten it, and 

 it should be used with discretion, so as not to inflict un- 

 necessary pain. 



THE HOODWINK. — The hoodwink is made use of 

 by veterinarians for the purpose of protecting the head 

 from injury in operations in the recumbent position, and 

 as a bhnd-fold for operations in the standing posture. In 



