Between electromyography (EMG)-guided and non-EMG-guided “point-touch” techniques, which is better in the laryngeal botulinum toxin (BTX) injection treatment of adductor spasmodic dysphonia (AdSD)?
Background: AdSD is the most common form of spasmodic dysphonia. The preferred treatment modality is the injection of BTX type A into the intrinsic adductor muscle compartment of the larynx. No particular injection technique has been shown to be superior to another, however.
Study design: Retrospective chart review.