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What is Amyl nitrate inhalation test is used to detect? and explain in detail?
Ans. is 'b' i.e., Achalasia cardiaAmyl nitrite inhalation is used to distinguish patients of achalasia from those with pseudoachalasia.Pseudoachalasia of the esophagus, is caused by tumor infiltration of the distal esophagus, and closely simulates the esophageal motor and morphologic abnormalities of achalasia.Amyl nitrite inhalation causes relaxation of lower esophageal sphincter in achalasia. In contrast, amyl nitrite does not relax the LES segment in pseudoachalasia.