Understanding Dysphagia
Dysphagia refers to difficulty or discomfort when swallowing food or liquids. Swallowing involves more than 50 muscles and multiple neurological systems — when any part of this process fails, dysphagia can result.
Over 600,000 people in Hong Kong are affected by dysphagia, with the elderly population most at risk.
Dysphagia in Hong Kong: The Numbers
Hong Kong’s rapidly ageing population means the social burden of dysphagia is growing. Key prevalence data by condition:
| Condition / Group | Dysphagia Prevalence | Notes |
|---|---|---|
| Stroke (acute phase) | ~50% | Highest risk in the first week; some improvement possible within months |
| Dementia (moderate to late stage) | 45–93% | Rate rises with disease progression; nearly universal in late stage |
| Parkinson’s Disease | ~80% | Often underestimated by patients and families; impaired swallowing reflex |
| Care home residents (overall) | 30–40% | Approximately 1 in 3–4 residents requires dietary modification |
| Post head and neck cancer treatment | 75–100% | Depends on treatment site and scope; post-radiotherapy effects can persist for years |
| Motor Neuron Disease | Up to 100% | All patients eventually affected as disease progresses |
Aspiration Pneumonia: A Leading Cause of Death Among Care Home Residents
Aspiration pneumonia — caused when food or liquid enters the airway — is one of the most serious consequences of dysphagia. In Hong Kong care homes, pneumonia is among the most common causes of hospitalisation and death, and a significant proportion are linked to unmanaged or undetected dysphagia.
Common Causes
Neurological Conditions
| Condition | Relationship to Dysphagia |
|---|---|
| Stroke | Most common cause — damage to brain areas controlling swallowing |
| Parkinson’s Disease | Muscle coordination disorder affecting oral and pharyngeal control |
| Dementia | Delayed swallowing reflex, difficulty remembering chewing/swallowing steps |
| Motor Neuron Disease | Progressive degeneration of swallowing muscles |
| Multiple Sclerosis | Nerve conduction impairment |
Head and Neck Conditions
- Head and neck cancers (pharyngeal, laryngeal, oesophageal) and post-radiotherapy effects
- Swollen tonsils, adenoids, or throat tissue
- Cervical osteophytes compressing the oesophagus
Age-Related Changes
- Sarcopenia (natural muscle loss) reducing chewing and swallowing strength
- Reduced saliva production (dry mouth)
- Missing teeth or ill-fitting dentures
- Slower swallowing reflex
Warning Signs
Seek medical evaluation promptly if you observe:
During eating:
- Coughing or choking while eating or drinking — for example, coughing immediately after drinking water, or frequently clearing the throat during meals
- Food or liquid coming out of the nose
- Food pooling on one side of the mouth (common in stroke patients with facial weakness)
- Sensation of food “sticking” in the chest or throat after swallowing
- Multiple swallowing attempts needed per mouthful, or needing extra liquid to “wash down” food
- Meals taking noticeably longer than before (over 30 minutes), or deliberately avoiding certain food textures
After eating:
- “Wet” or gurgling voice quality — a sign of liquid pooling in the throat
- Recurrent fever or pneumonia — especially if every respiratory illness progresses to pneumonia, which warrants high suspicion of dysphagia
- Unexplained weight loss or dehydration
Silent Aspiration — The Danger That’s Hardest to Spot
Approximately 40% of aspiration events occur without coughing or obvious symptoms. Food or liquid silently enters the airway without triggering a cough reflex. This is called “silent aspiration” and is particularly common in patients with dementia and Parkinson’s Disease. Because there are no visible warning signs, it is frequently missed by patients and carers alike — only discovered when aspiration pneumonia develops.
Key principle: Recurrent pneumonia = immediately suspect dysphagia. Refer for speech therapy assessment.
High-Risk Foods in the Hong Kong Context
Hong Kong’s rich food culture includes many everyday foods that carry high risk for people with dysphagia:
| Food Category | Common Examples | Risk Reason |
|---|---|---|
| Dim sum | Har gow, siu mai, cheung fun (with skin), char siu bao | Chewy textures require thorough chewing; filled items have soft exterior with solid filling |
| Noodle dishes | Wonton noodle soup, thick noodles, udon, rice noodles | Long strands can slide in whole; noodle soups are high-risk “mixed consistency” (liquid + solid) |
| Vegetables | Water spinach (ong choy), celery, string beans | Coarse fibres are difficult to break into uniform pieces |
| Sticky foods | Glutinous rice, tang yuan, mochi, nian gao | Highly adhesive — can stick to the throat and resist moving into the oesophagus |
| Round or small foods | Green peas, peanuts, whole grapes, longan | Risk of sliding in whole and obstructing the airway |
| Mixed-texture foods | Watermelon (liquid + fibre), fish soups (with fish pieces), pork bone broth | Liquid and solid components simultaneously, difficult to coordinate swallowing |
| Hard and dry foods | Crackers, nuts, fried pork skin, prawn crackers | Extremely difficult to crush; dry crumbs easily inhaled |
| Inconsistently textured foods | Hot tofu pudding (doufu fa), some steamed eggs (if too thin) | Unstable texture or thinning when heated |
Common caregiver misconception: “Congee is easy to swallow, so it’s safe.”
Not necessarily. Traditional Cantonese congee (such as pork and century egg congee, or mixed congee with rice grains and toppings) contains solid pieces of rice, meat, and other ingredients — making it a “mixed consistency” food with significant risk for dysphagia patients. A fully smooth IDDSI Level 4 puréed congee base is required, not ordinary plain congee or congee with visible toppings.
When to See a Doctor or Speech Therapist
The following should prompt an immediate or urgent referral:
- Repeated coughing or choking during meals (especially when drinking)
- Unexplained weight loss or signs of dehydration
- Recent episode of pneumonia, particularly if recurrent
- Diagnosis of stroke, Parkinson’s Disease, dementia, or other high-risk conditions
- Patient reports feeling uncomfortable eating, eating more slowly, or deliberately eating less
Emergency situations (seek immediate help):
- Food or foreign object obstructing the airway, causing difficulty breathing
- Severe choking episode followed by persistent rapid breathing or high fever
Referral and Assessment in Hong Kong
Public Sector (Free)
Speech Therapy (Public Hospitals)
- Referral: via GP or A&E doctor
- Services: clinical swallowing assessment, FEES (endoscopy), VFSS (videofluoroscopy)
- Available at all 8 hospital clusters in Hong Kong
Community: Geriatric Day Hospitals
- Swallowing assessment and follow-up treatment
- Referral via social worker or GP
Find a speech therapist:
- Hong Kong Speech and Hearing Association (HKSHA): hksha.org
- Hong Kong Association of Speech-Language Pathologists (HKSAT): hksat.org
Private Sector (Self-pay)
| Service | Estimated Cost |
|---|---|
| Private speech therapy session | HKD $800 – $2,000 |
| Clinical swallowing assessment | HKD $1,500 – $3,000 |
| FEES endoscopic assessment | HKD $3,000 – $6,000 |
Dietary Adjustments: The IDDSI Framework
Dysphagia patients require food and liquid texture modification based on their individual assessment. Hong Kong and the Greater Bay Area use the IDDSI framework, with 8 levels (Level 0–7).
Key principles:
- Avoid “dual-texture” foods (e.g. soup with solid pieces, congee with visible rice grains)
- Liquids are often harder to control than solids (higher aspiration risk)
- IDDSI level must be determined by a speech therapist — do not self-assess
Care Tips for Families and Care Staff
Meal Environment
- Ensure the person is sitting upright (at least 90°) — never feed while lying down
- Minimise distractions (turn off TV, reduce noise)
- Do not rush — allow the person to eat at their own pace
- Maintain upright posture for at least 30 minutes after eating
Feeding Technique
- Offer small amounts at a time (one teaspoon is ideal)
- Confirm each mouthful is fully swallowed before offering more
- Watch for “wet voice” quality after swallowing
Oral Hygiene
- Perform oral care before and after each meal
- Removing oral bacteria significantly reduces aspiration pneumonia risk
Frequently Asked Questions
Q: Can my family member continue eating regular food if they have dysphagia?
A: It depends on severity. Mild dysphagia may only require avoiding specific high-risk foods. Severe cases may require complete dietary modification to IDDSI Level 4 or below. Always seek assessment from a speech therapist — do not self-judge.
Q: Is care food (soft diet) the same as congee or purée?
A: Not necessarily. Modern care food can be visually appealing with intact shapes, just with modified texture. The goal is safe eating while maintaining the person’s dignity and enjoyment of food.
Q: Are thickening agents safe for long-term use?
A: Clinical thickening agents are safe when used correctly. The main concern with long-term use is adequate fluid intake — thickened liquids are typically consumed in smaller amounts, so monitor for adequate hydration.
Q: Can dysphagia improve?
A: It depends on the cause. Stroke-related dysphagia can improve with active speech therapy, especially with early intervention. Dysphagia from degenerative conditions (dementia, Parkinson’s) is less likely to reverse — the goal is maintaining function and safety.
Information on this page is for educational purposes only and does not constitute medical advice. Please consult a qualified healthcare professional for any health concerns.