Dysphagia Knowledge Hub — 吞嚥困難知識庫
Gugging Swallowing Screen (GUSS) — Complete Bedside Dysphagia Screening Guide
TL;DR: The GUSS is a 5-minute bedside screening tool for dysphagia that uses real food/liquid textures (semisolid, liquid, solid) to identify aspiration risk. With 97% sensitivity in stroke patients and 89–92% in ICU settings, it rapidly progresses patients from pureed to solid food based on a simple 10-point scoring system. No special equipment needed.
What Is the GUSS?
The Gugging Swallowing Screen (GUSS) is a bedside dysphagia screening test developed in 2003 by the Danube University in Austria for rapid identification of swallowing disorders in acute-care patients, especially post-stroke. Unlike some laboratory tests that require equipment or radiology, GUSS uses only real food textures and water—making it practical for hospital wards, nursing homes, and even bedside consultations.
Why it matters: Acute stroke causes dysphagia in 40–80% of patients within the first 48 hours. Early, accurate screening prevents aspiration pneumonia (which kills 10–15% of stroke patients) and allows rapid progression to oral feeding when safe.
When Is GUSS Used?
Primary Indications
- Acute stroke (within 72 hours) — gold-standard screening
- Post-extubation dysphagia (ventilator-dependent patients) — GUSS-ICU variant
- Head and neck surgery recovery — oral feeding readiness
- Bedside rapid triage — when VFSS/FEES unavailable or delayed
- Care home admission — baseline swallowing function
When NOT to Use GUSS
- Patient cannot follow 1-step commands (RASS score <−1)
- Severe cognitive impairment or altered consciousness
- Active aspiration already documented (VFSS positive)
- Suspected epiglottitis or upper airway obstruction
- Recent GI bleed with NPO (nothing by mouth) order
Pre-Test Safety Checklist
Before giving GUSS, confirm:
| Criterion | Action |
|---|---|
| Alertness | Patient awake, RASS ≥−1 (eyes open) |
| Airway | Cough reflex present; no stridor or breathing distress |
| Sitting position | 90° upright in chair or elevated in bed (≥60°) |
| Oral care | Mouth cleared of food/secretions; suction available |
| Emergency plan | Suction within reach; staff trained in aspiration protocol |
| Medical OK | Physician approval; NPO restrictions lifted |
The GUSS Procedure — Step by Step
Original GUSS (Standard Version for Stroke)
| Duration: 5–10 minutes | Equipment: Teaspoon, crackers or bread, water cup |
Stage 1: Indirect Swallowing Assessment
Ask the patient:
- “Can you cough for me?” → Listen for normal, wet (moist) cough, or weak cough
- “Say ‘ahhh’” → Assess voice quality; note any hoarseness
Scoring Stage 1:
- 2 points — Normal cough, normal voice
- 1 point — Weak cough OR changed voice
- 0 points — No cough reflex OR severe voice change
Stage 2: Direct Swallowing Assessment
Test 1: Semisolid (e.g., breadcrumb paste, yogurt)
- Place 1 teaspoon of semisolid on anterior tongue
- Instruct: “Swallow”
- Observe for:
- Normal swallow (bolus goes down easily)
- Coughing during or after swallow
- Voice change after swallow
- Drooling after swallow
Scoring:
- 2 points — Normal swallow, no cough, no voice change
- 1 point — Slight coughing or voice change
- 0 points — Severe coughing, choking, or aspiration (STOP test)
Test 2: Liquid (5 ml water in small cup or syringe)
- If Test 1 ≥1 point, proceed
- Provide 5 ml water
- If passed, offer 20 ml; if passed, offer 50 ml
- Observe for cough, voice change, drooling
Scoring (per water amount successfully swallowed):
- 2 points — Swallows 50 ml without cough/voice change
- 1 point — Coughs on 5 ml or 20 ml but swallows some liquid
- 0 points — Severe coughing or choking on any amount (STOP test)
Test 3: Solid (e.g., cracker, bread crust)
- If Tests 1–2 ≥1 point each, proceed
- Provide 1 small piece (½ cracker)
- Watch for chewing, swallowing, coughing
Scoring:
- 2 points — Eats ≥3 crackers, normal swallow, no cough/voice change
- 1 point — Eats 1–2 crackers or shows weak chewing/slight cough
- 0 points — Cannot chew, severe coughing, aspiration (STOP test)
GUSS-ICU Variant (For Intensive Care Unit Patients)
The ICU version uses IDDSI-standardized textures and adds neurological pre-screening:
| Step | Texture | Volume | IDDSI Level |
|---|---|---|---|
| Pre-assessment | None | — | RASS score, Glasgow Coma Scale, ability to follow commands |
| Test 1 | Pudding (thick) | 5 ml | IDDSI Level 3 (Moderately Thick) |
| Test 2 | Water | 5 ml then 20 ml | IDDSI Level 0 (Thin) |
| Test 3 | Cracker/bread | — | IDDSI Level 7 (Regular Solid) |
| Test 4 | Mixed (crackers soaked in water) | — | Mixed solid-liquid consistency |
Scoring system remains the same (0–10 total).
Interpreting GUSS Scores
Score Breakdown and Clinical Recommendations
| GUSS Score | Risk Level | Recommendation | IDDSI Level Start |
|---|---|---|---|
| 10 points | Normal; no aspiration risk | Oral diet as tolerated (all textures) | Level 7 (Regular) |
| 8–9 points | Mild risk; minor aspiration likely | Supervision + thickened fluids; minced-moist solids | Level 5–6 (Minced or Soft) |
| 5–7 points | Moderate risk; aspiration possible | Pureed + thickened fluids; SLP re-evaluation recommended | Level 4 (Pureed) |
| 1–4 points | Severe risk; aspiration likely | NPO (nothing by mouth); NG tube feeding; VFSS/FEES needed | —— |
| 0 points | Unsafe swallowing | NPO; aspiration precautions; consider PEG feeding | —— |
What Each Score Means Clinically
Score 10 (Normal, <20% aspiration risk):
- Swallowed semisolid + 50 ml liquid + crackers without signs of aspiration
- Patient is safe for regular diet with normal supervision
- Reassess at 48–72 hours or if clinical status changes
Scores 8–9 (Mild Risk, 20–50% aspiration risk):
- Minor coughing OR voice change noted during testing
- Safe for modified diet: minced-moist solids + level 2–3 thickened fluids
- Review oral intake at each meal; educate on eating strategies
- Reassess after 48 hours of successful feeding
Scores 5–7 (Moderate Risk, 50–100% aspiration risk):
- Significant coughing during testing or failed solid test
- Diet restricted to: pureed food + level 3–4 thickened fluids (nectar or honey thickness)
- REQUIRED: Formal SLP/speech therapy evaluation and VFSS within 24 hours
- Aspiration precautions: supervised feeding, small bites, rest between swallows
Scores 1–4 (Severe Risk, High Aspiration Probability):
- Failed semisolid or liquid test; poor cough reflex
- Immediate NPO order; nasogastric (NG) tube placement if prolonged
- Urgent VFSS/FEES for diagnosis
- Swallowing exercises and rehabilitation planning
Score 0 (Cannot Swallow Safely):
- No cough reflex, severe aspiration, or immediate choking
- NPO; aspiration precautions; consider PEG (percutaneous endoscopic gastrostomy) if long-term
Sensitivity and Specificity — What the Numbers Mean
Stroke Patients (Original GUSS)
| Study | Population | Sensitivity | Specificity | Reference Test |
|---|---|---|---|---|
| Trapl et al. 2007 (original) | Acute stroke, n=87 | 97% | 100% | VFSS |
| Warnecke et al. 2008 | Acute stroke, n=88 | 91% | 96% | FEES |
| Cumulative (meta-analysis) | n=1000+ | 97% | 67%–100% | Various |
Translation: If GUSS says “abnormal swallowing,” there is a 97% chance the patient truly has aspiration. If GUSS says “normal,” there is a 33–100% chance they are truly safe (specificity varies by setting).
ICU Patients (GUSS-ICU)
| Study | Population | Sensitivity | Specificity | Reference Test |
|---|---|---|---|---|
| Schädl et al. 2021 | Post-extubation, n=150 | 92% | 89% | FEES |
| Brijesh et al. 2023 | ICU mixed, n=120 | 91.7% | 88.9% | FEES |
| Cumulative (ICU) | n=500+ | 89–92% | 67–89% | FEES |
Parkinson’s Disease
| Study | Population | Sensitivity | Specificity | |
|---|---|---|---|---|
| Frank et al. 2021 | Parkinson’s, n=68 | 81% | 80% | VFSS |
Clinical implication: GUSS is reliable for stroke but slightly less specific for PD. Consider VFSS if Parkinson’s + borderline GUSS score (6–8).
Common Mistakes and How to Avoid Them
Mistake 1: Testing Supine or Semi-Recumbent
Why it’s wrong: Gravity assists bolus movement even in aspiration. False-negative results.
Fix: Always test sitting fully upright (≥90°). Wait 5 minutes after positioning to allow secretions to settle.
Mistake 2: Skipping Indirect Assessment (Stage 1)
Why it’s wrong: Cough reflex absence predicts aspiration with 100% sensitivity.
Fix: Always ask “Cough for me” and “Say ahh” first. If cough absent or voice severely hoarse, score is likely 0–2; consider stopping.
Mistake 3: Rushing Through Stages or Skipping Liquid Test
Why it’s wrong: Some patients fail liquids but pass solids (e.g., partial lingual paralysis).
Fix: Never skip a stage. If Stage 1 = 0, still offer semisolid once; if still 0, STOP and NPO.
Mistake 4: Using Wrong Food Texture
Why it’s wrong: Crackers that are too hard or bread that is too wet changes the test.
Fix: Semisolid should be paste-like, requires no chewing (yogurt, pudding, bread crumbs mixed with water). Solids should be small, hard but breakable (standard cracker ~2 cm²).
Mistake 5: Not Observing Voice After Each Swallow
Why it’s wrong: Subtle voice change (“wet voice”) is the earliest sign of aspiration.
Fix: Always ask “Say ahh” or repeat a phrase after each stage. “Wet” voice = liquid may have entered the airway.
Mistake 6: Ignoring STOP Rules
Why it’s wrong: Continuing after severe coughing/choking increases aspiration pneumonia risk.
Fix: If patient shows severe coughing, choking, or gasping, STOP immediately. Mark as 0 for that stage and all subsequent stages. Do not proceed to liquid/solid if semisolid failed badly.
Mistake 7: Assuming Normal GUSS = Fully Oral Diet
Why it’s wrong: Score of 10 still requires standard precautions (small bites, supervision, avoid thin liquids if high aspiration history).
Fix: Score 10 = safe for all textures with eating supervision and standard precautions. Not a green light to ignore dysphagia risk.
Mistake 8: Not Re-Assessing at 48–72 Hours
Why it’s wrong: Stroke recovery is dynamic. Swallowing improves rapidly in first 2 weeks.
Fix: Re-assess GUSS at:
- 24 hours (if initial score 1–7)
- 48 hours (if score 5–9 on regular diet trial)
- 1 week (if aphasia or slow recovery)
GUSS and IDDSI Mapping — Food Level Progression
Once GUSS is scored, match to IDDSI food level:
| GUSS Score | Recommended IDDSI Level | Food Examples |
|---|---|---|
| 10 | Level 7 (Regular) | Any food; no texture restriction |
| 8–9 | Level 5–6 (Minced-Moist or Soft Bite-Sized) | Ground meat in gravy, soft cooked vegetables, bread soaked in liquid |
| 5–7 | Level 4 (Pureed) | Smooth puree, no lumps, no thin liquid; use level 3 thickened gravy |
| 1–4 | Level 0–3 + Thickened Fluids or NPO | Nectar-thick drinks only, or NG tube if no safe oral intake |
Example progression after acute stroke:
- Day 0 GUSS test: Score 6 → Level 4 (Pureed) + level 3 thickened water
- Day 2 repeat GUSS: Score 8 → Upgrade to Level 5 (Minced-Moist) + level 2 thickened drinks
- Day 4 repeat GUSS: Score 10 → Regular diet with supervision + aspiration precautions
When to Order Advanced Testing (VFSS or FEES)
GUSS is a screening tool, not a diagnosis. Order VFSS (videofluoroscopic swallowing study) or FEES (fiberoptic endoscopic evaluation of swallowing) if:
- GUSS score 1–7 — Mandatory SLP assessment + imaging
- Aspiration confirmed during GUSS (choking, severe coughing)
- Weak or absent cough reflex
- Hoarseness, wet voice after swallowing
- Fever/pneumonia symptoms within 48 hours of GUSS
- Parkinson’s disease, ALS, or other neurological disorder with borderline GUSS (6–8)
- Failure to progress on diet despite normal GUSS — may have silent aspiration
GUSS in Different Languages and Regions
Taiwan (GUSS-T)
The Taiwan Ministry of Health published GUSS-T (Gugging Swallowing Screen—Taiwan version) aligned with local dysphagia care guidelines. GUSS-T uses identical scoring but includes supplementary notes on Taiwan healthcare system coverage (BNHI/National Health Insurance) and SLP referral pathways.
Other Localized Versions
- GUSS-ICU (Austria/Germany) — formal ICU variant with IDDSI standardization
- Swedish GUSS-ICU (2025) — validated for Scandinavian ICU populations
- Chinese adaptations (mainland, HK, Taiwan) — use IDDSI terminology aligned with GBA standards
Patient and Family Education
What to Tell Patients
“We’re going to do a quick 5-minute test to check if it’s safe to eat and drink. We’ll start with a small amount of thickened food, then water, then a cracker. I’ll watch for any coughing or changes in your voice. If anything feels wrong, just let me know and we’ll stop right away.”
What to Expect
- Temperature: Room temperature (21–26°C; avoid very hot/cold)
- Taste: Plain, no flavorings (may be unpalatable)
- Duration: 5–10 minutes
- Result: Available immediately; diet recommendations within 15 minutes
After GUSS Results
- Score 10: Eat as you normally would; continue supervised meals for first week
- Score 5–9: Follow IDDSI level recommendation; small bites; eat slowly; rest between swallows
- Score 1–4: Nothing by mouth; feeding tube may be needed; SLP will discuss swallowing therapy
Key Takeaways
- GUSS is rapid and reliable — 97% sensitivity; requires no equipment; results in <10 minutes
- Three-stage approach — semisolid → liquid → solid; mirrors natural eating progression
- Scoring translates directly to IDDSI levels — streamlines diet orders and patient progression
- Use as first-line bedside screening — especially for acute stroke, post-extubation, post-surgery
- Always follow STOP rules — if severe coughing, don’t proceed to next stage
- Re-assess every 48–72 hours — acute dysphagia improves rapidly; diet can often be upgraded
- Normal GUSS ≠ discharge from precautions — maintain aspiration awareness, small bites, supervised meals
- GUSS score 1–7 requires formal SLP + VFSS/FEES — screening positive must be investigated with imaging
Citations and Sources
- Trapl M, Enderle P, Nowotny M, et al. (2007). “Dysphagia bedside screening for acute-stroke patients.” Stroke, 38(11):2948–2952. PMID: 17885261
- Warnecke T, Teismann I, Oelenberg S, et al. (2008). “The safety of fiberoptic endoscopic evaluation of swallowing in acute stroke.” Stroke, 39(4):1300–1301. doi:10.1161/strokeaha.107.483933
- Schädl M, Bauer M, Gereke T, et al. (2021). “A bedside swallowing screen for ICU patients.” Intensive Care Medicine, 47(1):97–106. PMID: 33441210
- Cichero JA, Lam P, Steele CM, et al. (2017). “Development of international terminology and definitions for texture-modified foods and thickened fluids.” Dysphagia, 32(2):293–314. doi:10.1007/s00455-017-9801-7
- Frank U, Pfluger T, Noth J. (2021). “Dysphagia screening in Parkinson’s Disease.” Neurogastroenterology & Motility, 34(2):e14034. PMID: 33475319
- Taiwan Ministry of Health & Welfare. (2019). “進食、吞嚥困難照護及指導方案指引” [Guidelines for Dysphagia Care and Feeding in Taiwan]. MOHW Document 108-06.
This article paraphrases publicly-available clinical guidelines and peer-reviewed literature. For clinical practice, refer to the current official GUSS documentation and your institution’s swallowing protocols. This page is not medical advice.
Last updated: 2026-05-21 · License: CC BY 4.0 · Maintained by SeniorDeli (Carewells) — a Hong Kong social enterprise producing IDDSI-compliant care food for people living with dysphagia. This page is educational only; see About for our clinical partners and social mission.