Most people go through a series of other tests and often get other diagnoses, most commonly refractory (unresponsive) asthma, before they have a laryngoscopy and receive a definite diagnosis of VCD.
This was similar to indirect laryngoscopy (1 out of 11 firms ).
Some of the common causes of difficult direct laryngoscopy are: Improper positioning.
flexible laryngoscopy A test to examine your upper airways and voice box.
If these actions are not enough to determine the cause of the cough, a bronchoscopy or laryngoscopy may be ordered.