What Is GUSS?

The Gugging Swallowing Screen (GUSS) is a validated bedside dysphagia assessment tool developed by Michaela Trapl and colleagues at the Gugging Neurology Centre in Austria, primarily for use in acute post-stroke settings. It operates on a 20-point scale and is structured to systematically progress from indirect observation to direct swallow trials — stopping at the first sign of aspiration risk.

GUSS is distinguished from patient self-report tools such as EAT-10 in that it requires trained clinical administration and involves direct observation of swallowing. It is, however, specifically designed to be administered at the bedside by nursing staff with appropriate training, without waiting for an SLT. This makes it particularly valuable in acute care environments where early identification of aspiration risk is essential and SLT access may be delayed.

The tool was validated against videofluoroscopic swallowing studies (VFSS) in stroke patients and has demonstrated high sensitivity for aspiration detection in this population.

When to Use GUSS vs. Other Assessment Tools

GUSS occupies a defined position in the dysphagia assessment hierarchy. Understanding this position avoids both under- and over-reliance on the tool.

Use GUSS when:

• A patient is admitted to an acute ward following stroke or other neurological event and swallowing safety is uncertain
• Nursing-led triage is required before SLT is available (particularly out-of-hours)
• A rapid, structured assessment is needed to guide immediate dietary management decisions
• Serial monitoring of a recovering patient’s swallowing function in the sub-acute phase is required

Use instrumental assessment (FEES or VFSS) instead of or in addition to GUSS when:

• GUSS indicates moderate or severe dysphagia and the nature of the swallowing impairment needs to be characterised physiologically
• Silent aspiration is suspected (particularly in patients with reduced sensation or cognitive impairment)
• Therapeutic swallowing manoeuvres are being trialled and their safety needs to be confirmed visually
• Tracheostomy is present — GUSS is not validated for this population

For a structured comparison of GUSS with EAT-10, MASA, and MNA-SF, see the dysphagia assessment tools comparison page.

Part 1: Indirect Swallowing Test (Maximum 5 Points)

The indirect test assesses swallowing readiness without introducing any food or liquid. It must be passed (score = 5) before progressing to Part 2. If the patient fails any item, do not proceed to direct trials.

The five items assessed are:

1. Vigilance — Is the patient alert and able to sustain attention for at least 15 minutes? (Prerequisite; not scored separately but required to proceed)
2. Voluntary cough or throat clearing — Ask the patient to cough or clear their throat. Score 1 point if successful.
3. Swallowing of saliva — Observe for a swallow attempt. Score 1 point if a successful swallow occurs.
4. Drooling — Score 1 point if drooling is absent.
5. Voice change after saliva swallow — Ask the patient to say “ah” after the swallow. Score 1 point if the voice is normal (not wet/gurgly).

Maximum Part 1 score: 5. A score of 5 is required to proceed to Part 2.

Part 2: Direct Swallowing Tests (Maximum 15 Points)

Part 2 consists of three sequential subtests administered in order. Do not advance to the next subtest if the patient fails the current one. Each subtest is scored out of 5 points.

Subtest 1 — Semi-solid (e.g., ½ teaspoon of pudding-consistency food) Administer ½ teaspoon, then 1 teaspoon, then 3 teaspoons if no signs of aspiration. Score 1 point each for: swallowing occurs without difficulty (1 pt), no drooling (1 pt), no voice change after swallow (1 pt), no coughing (1 pt), no additional attempts at swallowing required (1 pt).

Subtest 2 — Liquid (3–5–10–20–50 mL water, sequential) Only proceed if Subtest 1 scored 5. Administer thin water in progressively larger volumes. Scoring criteria are identical to Subtest 1 (5 points maximum). Stop immediately if coughing, wet voice, or oxygen desaturation ≥2% occurs.

Subtest 3 — Solid (piece of dry bread) Only proceed if Subtests 1 and 2 both scored 5. The patient must chew and swallow a piece of dry bread. Scoring criteria are identical (5 points maximum).

Maximum Part 2 score: 15.

Total GUSS score range: 0–20.

GUSS Scoring and IDDSI Interpretation

These dietary recommendations should be treated as interim guidance pending formal SLT assessment. The IDDSI levels above represent appropriate starting points, not definitive prescriptions. A score of 10–14 in particular encompasses a clinically heterogeneous group and warrants individualised SLT evaluation before finalising texture levels. For an overview of IDDSI levels, see the IDDSI guide.

Digital GUSS: Structured Scoring via the SeniorDeli App

Documenting GUSS assessments on paper introduces transcription errors and makes longitudinal tracking across multiple assessors difficult. The SeniorDeli app provides a structured digital GUSS recording form with:

• Step-by-step guided administration prompts for each subtest
• Automatic score calculation and IDDSI recommendation generation
• Timestamped records linked to the resident or patient profile
• Exportable reports for SLT review and medical record inclusion

The digital GUSS module is available free within the app and is calibrated to Hong Kong care and hospital settings.

Access the SeniorDeli app at seniordeli.com/app

Limitations and When GUSS Is Not Sufficient

GUSS is a screening tool, not a diagnostic instrument. Clinical staff and SLTs should be aware of its boundaries:

Cognitive impairment: GUSS requires the patient to follow verbal instructions and cooperate with the assessment protocol. In moderate-to-severe dementia or patients with severe aphasia, reliable administration may not be possible. Alternative observation-based approaches or caregiver-report tools such as EAT-10 may be more appropriate for initial triage in these populations.

Silent aspiration: GUSS relies on observable signs — coughing, wet voice, drooling. Patients who aspirate silently (without triggering a protective cough reflex) may pass GUSS despite unsafe swallowing. Silent aspiration is more common in stroke patients, the elderly, and those with reduced laryngeal sensation. When silent aspiration is suspected, instrumental assessment (FEES or VFSS) is mandatory.

Tracheostomy: GUSS has not been validated in tracheostomised patients. Modified Evans Blue Dye Test (MEBDT) or fibreoptic endoscopic evaluation is preferred in this population.

Non-stroke populations: GUSS was developed and validated primarily in acute stroke. While it is used in other neurological conditions, the predictive validity for aspiration risk in Parkinson’s disease, dementia, or head and neck cancer populations is less well established.

For further reading on dysphagia assessment, see the post-stroke swallowing assessment guide and the speech therapy referral pathway for Hong Kong settings.

Content reviewed by the softmeal.org clinical editorial team. This page is intended for qualified healthcare professionals and trained clinical staff. GUSS should only be administered following appropriate training. It does not replace formal assessment by a qualified speech-language pathologist.