Implementing IDDSI in Hospital and Care Settings: A Practical Roadmap

The International Dysphagia Diet Standardisation Initiative (IDDSI) framework has become the global standard for communicating texture-modified food and thickened liquid prescriptions in dysphagia management. Adopted formally by hospitals, care home networks, and national health systems across the UK, Australia, New Zealand, Canada, Hong Kong, and beyond, IDDSI replaces inconsistent historical terminology (National Dysphagia Diet levels, UK descriptors, Australian levels) with a single, evidence-based, eight-point classification system.

Institutional implementation is more complex than simply distributing a chart. It requires coordinated change across clinical, kitchen, procurement, education, and governance systems. This article provides a step-by-step roadmap for healthcare institutions undertaking IDDSI adoption or consolidation.

Phase 1: Governance and Leadership Alignment

Establish a multidisciplinary IDDSI steering group

Effective implementation requires buy-in and participation from:

• Speech-language pathology (SLP): Clinical owner of dysphagia assessment and level prescription.
• Dietetics: Nutritional adequacy monitoring; thickener product selection; menu compliance.
• Catering / food service management: Preparation protocols, testing, batch records, procurement.
• Nursing: Administration of modified-texture meals; fluid balance documentation; cough/aspiration observation.
• Pharmacy: Review of medication administration in thickened liquid vehicles.
• Quality and patient safety: Audit frameworks; incident reporting for consistency failures.
• Senior clinical and operational leadership: Accountability, resource authorisation, culture change.

The steering group should meet monthly during implementation (typically 6–18 months for a hospital), then quarterly for ongoing governance.

Define scope and timeline

Determine:

• Which wards, units, or facilities are in-scope for the first wave.
• Whether a phased rollout (high-dependency dysphagia wards first) or simultaneous institution-wide implementation is preferred.
• Training completion deadlines.
• Go-live date for official changeover from legacy terminology.

Phase 2: Policy and Protocol Development

Patient identification and assessment pathway

Develop or update a dysphagia screening and management pathway specifying:

1. Which staff are authorised to perform initial dysphagia screening (typically nursing, using a validated tool such as the EAT-10).
2. Referral criteria to SLP for formal assessment.
3. SLP assessment documentation standards — IDDSI level, rationale, associated instructions (e.g., liquid thickening level, compensatory manoeuvres, supervision requirements).
4. Communication of IDDSI prescription to catering, nursing, and patient/family.
5. Review and reassessment triggers.

The ASHA adult dysphagia clinical portal provides SLP scope-of-practice guidance applicable to international contexts. NICE guideline CG162 and related NICE nutrition guidelines provide the regulatory framework for nutritional monitoring in UK hospitals and care settings, and have influenced equivalent standards in Hong Kong.

Catering protocol

Develop a kitchen texture modification protocol covering:

• IDDSI level descriptions and verification tests for each level used in the facility.
• Thickener product specifications, doses per litre, and stand times.
• Batch record sheet format.
• Equipment specifications (Luer slip syringe, stainless steel fork, timer).
• Non-conformity procedure (failed batch: discard, re-prepare, retest, document).
• Service temperature standards.

Medication administration

Many patients with dysphagia cannot swallow tablets. The pharmacy protocol should specify:

• Which medications are available in liquid form.
• Which solid medications can be crushed and administered in thickened liquid or pureed food.
• Which must never be crushed (modified-release, enteric-coated).
• Compatibility of medication with IDDSI thickener types (xanthan vs starch; acidic vs neutral pH).

Phase 3: Staff Education and Competency

Training scope

All staff who interact with the preparation, administration, or monitoring of modified-texture food and thickened liquids require IDDSI training. This includes:

• Kitchen and catering staff (all levels).
• Ward nurses and healthcare assistants.
• SLPs and dietitians (update training on IDDSI specifics if coming from a legacy framework).
• Housekeeping staff who distribute meal trays (they must identify mislabelled trays).
• Agency and bank staff — a critical risk point.

Competency components

Minimum competency for kitchen staff:

• State the eight IDDSI levels and their descriptors.
• Demonstrate the IDDSI flow test correctly (syringe technique, timing, interpretation).
• Demonstrate the fork pressure test for Levels 4–6.
• Prepare a batch of thickened liquid to a specified level and verify it.
• Complete a batch record form.

Minimum competency for nursing staff:

• Identify the IDDSI level on a patient’s care plan.
• Verify that the tray delivered matches the prescription.
• Perform a basic visual check of liquid consistency.
• Observe for and document swallowing safety signals during and after meals (coughing, wet voice, distress).
• Know when to escalate to SLP.

Karen Chan and colleagues at the HKU Swallowing Research Laboratory have published extensively on the importance of multidisciplinary training in maintaining dysphagia care standards, noting that institutional competency in texture verification is a critical patient safety variable.

Documentation

Maintain a competency register with staff name, role, training date, trainer name, and sign-off. Refresher training should occur at a minimum annually, and whenever there is a change in products, procedures, or framework guidance.

Phase 4: Kitchen System Changes

Menu audit

Review the existing menu against IDDSI levels:

• Classify every dish at its natural texture level.
• Identify which dishes can be modified to achieve Level 4, 5, or 6 with minimal additional preparation.
• Identify dishes that are not suitable at any modified level (e.g., stringy vegetables, crunchy garnishes) and plan substitutions.
• Ensure the modified-texture menu achieves nutritional equivalence to the standard menu — this is a common failure point, where texture modification inadvertently reduces caloric density.

Equipment

Ensure the kitchen has:

• Commercial blenders with at least 1–2 HP motors (for smooth Level 4 pureed food).
• Food processors with fine grating/mincing attachments (for Level 5).
• Portion moulds for Level 4 plating (preserving visual appeal and preventing mealtime distress).
• Stock of 10 mL Luer slip syringes, stainless steel forks, and timers for QC.

Labelling

Every modified-texture tray must carry a patient-specific label stating:

• Patient name and ward.
• IDDSI food level.
• IDDSI liquid level and thickener specification.
• Any additional instructions (e.g., supervision required, no mixed textures, medications to be given separately).

The label must travel with the tray and be checked by the distributing staff against the patient care plan.

Phase 5: Audit and Continuous Improvement

Incident reporting

Establish a reporting pathway for:

• Incorrect consistency delivered to a patient.
• Aspiration events during or after meals.
• Patient refusal of texture-modified diet (nutrition risk signal).
• Batch test failures (near-miss quality events).

Internal audit programme

Quarterly audit should assess:

• Batch record completion rate (target: 100%).
• Staff competency certification status.
• Menu nutritional equivalence review.
• Patient IDDSI level documentation completeness.
• Time from SLP assessment to catering order update.

National and regional benchmarking

Where available, institutions should participate in regional dysphagia care networks to benchmark their IDDSI implementation quality. In Hong Kong, the Hospital Authority and the Hong Kong Institute of Speech Therapists provide relevant guidance. Internationally, IDDSI.org maintains resources and case studies from successful implementations globally.

Challenges and Mitigation

Key Takeaways

• IDDSI implementation requires governance across clinical, catering, pharmacy, and quality teams.
• A multidisciplinary steering group should drive the programme with clear milestones.
• Staff competency — especially for agency workers — is the most common implementation failure point.
• Menu audit for nutritional equivalence is mandatory; texture modification must not reduce calorie intake.
• Continuous audit against batch test completion, incident reports, and competency rates drives improvement.

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