Dysphagia Management and Water Intake

Properties of Water that Make it Difficult to Swallow

Water is a thin liquid that flows quickly and is more difficult to control in the oral and pharyngeal cavities, increasing the risk of aspiration in patients with dysphagia 3, 4
Thin liquids like water require more precise coordination of swallowing mechanisms to prevent entry into the airway 1, 2
Water does not provide the sensory feedback that other foods with greater consistency offer, making it harder to detect its presence in the pharynx 3

Observing patients drinking small amounts of water (3 oz) is used as a validated method to detect dysphagia and aspiration 3, 4
Clinical signs of aspiration after drinking water include coughing, wet voice, throat clearing, or hoarse voice 3
Silent aspiration (without reflex cough) is especially common with thin liquids like water, increasing the risk of respiratory complications 5, 6

The standard therapeutic approach starts with thickened liquids and gradually progresses to thinner consistencies 2, 7
Consistency modifications follow a specific order according to the International Dysphagia Diet Standardisation Initiative (IDDSI), starting with safer consistencies and advancing to more difficult ones 1, 2
Unthickened water is generally introduced at the end of the rehabilitation process, when the patient has demonstrated control over other consistencies 1, 7

Studies have shown that thickened liquids (nectar or honey consistency) reduce aspiration visualized in videofluoroscopy compared to thin liquids 1, 8
However, the exclusive use of thickened liquids can lead to dehydration and decreased quality of life 1, 2

Patients with reduced level of consciousness are at high risk of aspiration and should not receive oral liquids until their condition improves 3, 4
Patients with severe degenerative neurological dysfunction and immobility are at higher risk of developing aspiration pneumonia after water intake 5, 6

Perform instrumental assessments (preferably FEES or VFSS) to determine the specific risk of aspiration with different consistencies 5, 2
Use tests such as the maximum swallowing volume or average volume per swallow to evaluate the ability to handle liquids 5, 6
Implement compensatory strategies such as postural changes (chin down) or swallowing maneuvers to improve safety when swallowing liquids 1, 2