Clicking noise in pneumomediastinum is known as
High-Yield Explanation
In pneumomediastinum,physical examination reveals subcutaneous emphysema in the suprasternal notch and Hamman's sign,which is a crunching or clicking noise synchronous with the heabeat and is best heard in the left lateral decubitus position.Kussmaul's sign is defined by either a rise or a lack of fall of the JVP with inspiration and is classically associated with constrictive pericarditis,restrictive cardiomyopathy,massive pulmonary embolism,right ventricular infarction,and advanced left ventricular systolic hea failure.Trail sign is the prominence of Sternocleidomastoid muscle on the side of tracheal detion. Ref:Harrison's medicine-18th edition,page no:2182,1823