Botulinum toxin A injection using ultrasound combined with balloon guidance for the treatment of cricopharyngeal dysphagia: analysis of 21 cases.

Ultrasound with balloon-guided BTX-A injection is probably a relatively safe, easy, and effective technique for the treatment of CPA caused by stroke, with better visualization of the injection procedure. A well-designed controlled trial with a larger sample size is needed for more convincing conclusions.