Transitioning Between IDDSI Levels: Clinical Indicators for Upgrade and Downgrade

The IDDSI level prescribed for a person with dysphagia is not fixed. Swallowing function can improve — particularly following stroke, surgery, or acute illness — or decline, as occurs in progressive neurological conditions such as Parkinson’s disease, motor neurone disease (MND), or dementia. Recognising the right clinical moment to recommend a transition between levels, and doing so safely, is a core competency in dysphagia management.

This article addresses when to upgrade (to a less restrictive level), when to downgrade (to a more restrictive level), how to assess readiness, and the documentation and communication steps that should accompany every transition.

The Principle: Least Restrictive Safe Level

The IDDSI 2019 framework and the ASHA adult dysphagia clinical portal both affirm that the goal of texture modification is to achieve the least restrictive diet that is safe for the individual — not the most restrictive diet that theoretically eliminates all aspiration risk.

Over-restriction carries real clinical harms:

• Reduced nutritional intake: Texture-modified food is generally less palatable; patients eat less.
• Dehydration: Thickened liquids are often poorly tolerated; patients drink less.
• Psychosocial harm: Significant restriction reduces quality of life and mealtimes as social events.
• Unnecessary dependency: Patients capable of managing a less restrictive diet lose the opportunity to practice safe swallowing.

Every dysphagia care plan should state a review date — commonly 4 weeks after prescription in an acute setting, or at discharge — so that the question of whether the current level remains appropriate is actively revisited.

Upgrading: Moving to a Less Restrictive Level

Clinical indicators for upgrade

Upgrading to a less restrictive IDDSI level (e.g., from Level 3 liquid to Level 2, or from Level 4 food to Level 5) may be appropriate when:

1. Formal instrumental assessment (VFSS or FEES) shows no penetration or aspiration at the candidate level.
2. Bedside swallowing evaluation by a qualified SLP shows improved indicators:
   • No coughing or choking on trial amounts of the candidate consistency.
   • No wet, gurgly, or hoarse voice quality post-swallow.
   • Adequate laryngeal elevation on palpation.
   • No drooling, oral residue, or prolonged oral transit.
3. Sustained improvement over a clinical observation period (typically at least 48–72 hours of consistent performance at the current level).
4. Patient and carer-reported function — fewer episodes of coughing, no subjective sense of “sticking.”
5. Underlying cause management — for example, post-stroke oedema resolved; post-surgical inflammation subsided; chest infection treated.

Research by Karen Chan and colleagues at the HKU Swallowing Research Laboratory has emphasised that instrumental assessment is the gold standard for identifying aspiration at different consistencies, and that clinical bedside assessment alone may miss silent aspiration — aspiration without coughing — in a significant proportion of patients. Where instrumental assessment is available, it should inform upgrade decisions.

Upgrade pathway

A typical upgrade sequence might be:

• Level 4 (Pureed) → Level 5 (Minced and Moist)
• Level 5 → Level 6 (Soft and Bite-Sized)
• Level 6 → Level 7 Adapted → Level 7 Regular

Or for liquids:

• Level 4 (Extremely Thick) → Level 3 (Moderately Thick)
• Level 3 → Level 2 (Mildly Thick)
• Level 2 → Level 1 (Slightly Thick) → Level 0 (Thin)

It is not always necessary to pass through every intermediate level. The SLP’s assessment determines the appropriate step size.

Downgrading: Moving to a More Restrictive Level

Clinical indicators for downgrade

Downgrading may be indicated when:

1. New aspiration events — overt choking, coughing on current-level food or liquid, observed or suspected aspiration.
2. Aspiration pneumonia — recurrent chest infections in the context of dysphagia are a strong indicator of inadequate protection at the current level.
3. Functional decline — new neurological events (second stroke), disease progression (Parkinson’s progression, dementia advancement), significant deconditioning, or new cognitive impairment reducing swallowing safety.
4. Deteriorating swallowing on reassessment — instrumental assessment confirms increased penetration or aspiration at the current level.
5. Fatigue-related aspiration — some patients manage safely at the beginning of a meal but aspirate toward the end; this may require smaller portions rather than level change, or both.

Emergency downgrade

In some situations, a clinical downgrade must be implemented before a formal SLP assessment is available:

• A patient with an established Level 7 Adapted diet is admitted with a new stroke — temporary downgrade to Level 4 may be warranted pending formal assessment.
• A patient previously on Level 2 liquid develops aspiration pneumonia — Level 3 or Level 4 can be implemented as a precautionary measure.

Nursing staff and ward doctors should have clear interim dysphagia protocols specifying what provisional level to use pending SLP review, and what level of supervision is required. The NICE guideline CG162 framework for nutritional management in hospital supports the principle that interim measures must be documented and followed up.

The Role of Compensatory Strategies in Transitions

Sometimes a patient is safe at a candidate level only when using a compensatory technique — such as chin-tuck during swallowing, effortful swallow, or Mendelsohn manoeuvre. In this case, the upgrade may be approved with the technique as a mandated condition, documented explicitly in the care plan.

Compensatory strategies add complexity:

• They require patient cooperation and cognitive capacity.
• They must be consistently applied, including by caregivers, across settings.
• They may be unreliable when the patient is fatigued, distracted, or in unfamiliar environments.

The SLP should consider whether the patient reliably uses the technique during unsupervised mealtimes before approving an upgrade conditional on its use.

Assessment Tools for Transition Decisions

Several standardised assessments inform level transition decisions:

The EAT-10 is particularly useful for tracking change over time — serial scores at 4-weekly intervals provide objective documentation of improvement or decline that complements clinical assessment.

Documentation Standards

Every IDDSI level transition should be documented with:

1. Date of transition.
2. Previous level and new level (food and liquid separately).
3. Clinical rationale — specific observations or test results that triggered the change.
4. Assessment performed — tool(s) used; whether instrumental assessment informed the decision.
5. Assessing clinician — name, professional role, registration number.
6. Conditions or compensatory strategies attached to the new level prescription.
7. Communication of change — catering order updated, nursing care plan updated, patient and family informed.
8. Next review date.

Documentation failures — particularly incomplete communication of level changes to the kitchen — are a common contributor to adverse events. A transition that is clinically decided but not transmitted to catering for 24–48 hours may result in the patient continuing to receive the old level with no one aware of the mismatch.

Communicating Transitions to Patients and Families

Level transitions should be communicated to the patient and family as meaningful clinical events, not administrative details:

• Explain what has changed and why — in plain language.
• Explain what foods/liquids are now included that were previously excluded.
• Explain any remaining conditions — e.g., “You can now have mildly thick liquids, but we still need to avoid thin water for the next month.”
• Provide written information — a brief patient summary card with the new level and permitted/excluded items.
• Invite questions — families often have specific food questions relevant to cultural or personal dietary preferences.

For comprehensive caregiver guidance on safe swallowing at home, refer to our article on safe swallow strategies.

Key Takeaways

• IDDSI levels should be reviewed regularly — they are not permanent prescriptions.
• Upgrade criteria: improved formal assessment + sustained clinical performance + managed underlying cause.
• Downgrade criteria: new aspiration events, functional decline, instrumental assessment showing deterioration.
• Document every transition with date, rationale, assessor, and communication record.
• Communicate level changes to catering immediately — documentation lag is a high-risk failure point.

References

1. Cichero JAY et al. (2017). Development of International Terminology and Definitions for Texture-Modified Foods and Thickened Fluids Used in Dysphagia Management. Dysphagia. PMID 26315994
2. IDDSI (2019). Complete IDDSI Framework. https://www.iddsi.org/framework
3. American Speech-Language-Hearing Association. Adult Dysphagia. https://www.asha.org/practice-portal/clinical-topics/adult-dysphagia/
4. NICE (2013, updated 2017). Intravenous fluid therapy in adults in hospital (CG162). https://www.nice.org.uk/guidance/cg162