Changes

===Other Tests===

===Other Tests===

Reduction of

Reduction of respiratory distress after the administration of a bronchodilator confirms the presence of bronchospasm^{1, allen}. To test this,  intravenous atropine can be administered at 0.02mg/kg. Horses with RAO (or SPAOD) should respond within 15 minutes¹. The dose of atropine should not be repeated as there is a risk of intestinal stasis.

respiratory distress after the administration of a bronchodilator

confirms the presence of bronchospasm. This ‘test’ is

best performed using intravenous atropine.

 

ivis Reduction of respiratory distress after administration of a bronchodilator confirms the presence of bronchospasm, the major cause of airway obstruction in heaves. Intravenous atropine  (0.02 mg/kg) should relieve respiratory distress within 15 minutes in a horse with RAO or SPAOD. A single atropine dose is safe but, the dose should not be repeated or there is a risk of intestinal stasis. In rare cases, horses with chronic interstitial pulmonary disease will present with classical signs of RAO but these animals will not respond to a bronchodilator.

===Pathology===

===Pathology===