The supraglottic swallow is a compensatory swallowing technique used in speech-language therapy to reduce aspiration by voluntarily closing the airway before and during the swallow. It is one of the most widely taught behavioural manoeuvres for patients with reduced or delayed laryngeal closure.
During a normal swallow, the vocal folds adduct reflexively to protect the trachea. In patients with neurological impairment, head and neck cancer, or other conditions affecting laryngeal function, this closure may be delayed, incomplete, or absent, leaving the airway vulnerable to food and liquid entry.
The supraglottic swallow works by having the patient voluntarily hold their breath before and during the swallow. Breath-holding triggers adduction of the true vocal folds, providing airway closure even when reflex closure is impaired. A cough immediately after swallowing clears any residue that may have settled on the closed folds.
The supraglottic swallow has substantial support in the dysphagia literature:
The supraglottic swallow is appropriate for patients who:
Common clinical populations include patients with head and neck cancer (particularly post-laryngeal or base-of-tongue surgery), stroke survivors with laryngeal involvement, and those with Parkinson’s disease at earlier stages.
Preparation: Practice the technique with saliva or a trace amount of safe liquid (as guided by your SLT) before using it at meals.
Tip for patients: Think of it as “breathe in, hold, swallow, cough, swallow, breathe.” Some clinicians use the mnemonic B-H-S-C-S-B to help patients remember the sequence.
In Hong Kong public hospitals, the supraglottic swallow is commonly taught by SLTs in the acute rehabilitation wards of regional hospitals under the Hospital Authority. It is frequently indicated post-laryngeal or pharyngeal surgery at Queen Mary Hospital and Prince of Wales Hospital oncology units. Cantonese-language patient instruction cards are available in most HA SLT departments; families should request these during the rehabilitation phase.
For patients unfamiliar with the concept of breath-holding on command, a brief demonstration using a small mirror to show the absence of fogging during the hold can be helpful. Cultural preference for warm liquids (e.g., soup, tea) rather than water means that thin liquid practice should always be conducted under SLT supervision.
Progress is best tracked with repeat instrumental assessment (VFSS or FEES) after four to six weeks of consistent practice. Clinical indicators of improved technique include elimination of wet vocal quality post-swallow, absence of coughing during meals, and patient-reported increased confidence at mealtimes.
Document technique compliance at each session and adjust instruction complexity as the patient’s learning progresses.
The supraglottic swallow is a well-established, low-cost behavioural intervention for aspiration due to reduced laryngeal closure. It requires patient cooperation and cognitive capacity, but for suitable candidates it offers meaningful reduction in aspiration risk. Prescribe it as part of a broader dysphagia management plan, always confirming efficacy with instrumental assessment where resources allow.