Modified Barium Swallow Study (MBSS / VFSS, with Speech)

Indications

• Suspected oropharyngeal dysphagia
• Aspiration / penetration assessment
• Post-stroke or neurodegenerative swallow evaluation
• Head/neck cancer post-treatment swallow function
• Determination of safe diet consistencies and compensatory strategies

Patient prep

• No strict NPO required; coordinate with speech-language pathologist (SLP)
• Patient seated upright in lateral position (often in specialized chair)
• Prepare graded barium consistencies (thin liquid, nectar/mildly thick, honey/moderately thick, pudding/extremely thick, and a barium-coated solid)

Contrast

Technique

• Performed jointly by radiologist and SLP
• Patient upright; primary lateral projection to assess all swallow phases and airway
• Record continuous video/rapid sequence (often reduced pulse rate, e.g., 15 pulses/sec, to limit dose)
• Administer graded consistencies and volumes; observe oral, pharyngeal, and upper esophageal phases
• Document penetration/aspiration (Penetration-Aspiration Scale) and residue
• Trial compensatory maneuvers (chin tuck, head turn, effortful swallow, double swallow) and consistency modifications
• AP view to assess symmetry of pharyngeal clearance and vocal cord/airway

Series / Sequences

Key points

• Goal is physiologic assessment of swallow safety and efficiency and to guide diet/therapy — not anatomic detail of the esophagus
• Minimize radiation: reduce pulse rate and total fluoro time; recorded loops allow review without continuous fluoro
• Identify aspiration (material below the vocal cords) vs penetration (into laryngeal vestibule above cords)
• SLP directs consistencies and compensatory strategies; radiologist documents anatomy and ensures study safety
• Stop or modify if gross aspiration with poor protective cough

References