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Grade 3 and 4 tears are acute, life-threatening emergencies and should be referred to a surgical facility. Before transportation it is essential that appropriate emergency care is provided and measures are taken to prevent faecal contamination. Epidural anaesthesia should be performed using either xylazine alone or xylazine in combination with lidocaine or mepivicaine. The rectum should be packed with an antiseptic tampon positioned cranially to the tear and extending to the anus. A length of stocking filled with betadine-soaked cotton has been recommended for this. Following this a purse-string suture should be placed in the rectum to prevent expulsion of the tampon. Broad-spectrum antibiotics, flunixin meglumine and appropriate tetanus prophylaxis should also be administered.  
 
Grade 3 and 4 tears are acute, life-threatening emergencies and should be referred to a surgical facility. Before transportation it is essential that appropriate emergency care is provided and measures are taken to prevent faecal contamination. Epidural anaesthesia should be performed using either xylazine alone or xylazine in combination with lidocaine or mepivicaine. The rectum should be packed with an antiseptic tampon positioned cranially to the tear and extending to the anus. A length of stocking filled with betadine-soaked cotton has been recommended for this. Following this a purse-string suture should be placed in the rectum to prevent expulsion of the tampon. Broad-spectrum antibiotics, flunixin meglumine and appropriate tetanus prophylaxis should also be administered.  
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At the referral facility, [[Colic Diagnosis - Abdominocentesis|abdominocentesis]] is performed to check for peritonitis. A number of surgical techniques have been described for the repair of Grade 3 and Grade 4 tears. These include suturing the tear closed via a rectal or ventral midline approach, or the use of a faecal diversion technique such as temporary colostomy to eliminate the passage of faeces throught the rectum. Surgical repair of rectal tears is associated with a high failure rate and consideration to the finance and the animal's welfare should be given before surgery is carried out.  
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At the referral facility, [[abdominocentesis]] is performed to check for peritonitis. A number of surgical techniques have been described for the repair of Grade 3 and Grade 4 tears. These include suturing the tear closed via a rectal or ventral midline approach, or the use of a faecal diversion technique such as temporary colostomy to eliminate the passage of faeces throught the rectum. Surgical repair of rectal tears is associated with a high failure rate and consideration to the finance and the animal's welfare should be given before surgery is carried out.  
    
==Prognosis==
 
==Prognosis==
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