Choosing an instrumental exam
FEES vs. modified barium swallow (MBS): which is right for your resident?
FEES and MBS (also called VFSS) are both instrumental swallowing assessments, and they answer slightly different questions. Here is how they compare in a skilled nursing setting.
| FEES (mobile, bedside) | MBS / VFSS (radiology) | |
|---|---|---|
| Where it happens | In the resident’s room | Hospital or outpatient radiology suite, or a mobile x-ray unit |
| Transport | None | Usually required, often with a staff escort |
| Radiation | None | Yes (low-dose fluoroscopy) |
| Food used | Real food and liquid, including the resident’s meal | Barium-coated food and liquid |
| Best views | Pharynx and larynx anatomy, secretions, residue, aspiration before and after the swallow | Oral phase, the moment of swallow, and esophageal transit |
| Fatigue and meal-length testing | Yes. The study can run through a full meal. | Limited by radiation time |
| Repeatable | Easily, to track progress | Limited by radiation and logistics |
| Trach, vent, bedbound, or bariatric | Well suited | Often difficult |
| Results | At bedside, with the report within 48 business hours | Varies by facility |
Bottom line: FEES complements MBS rather than replacing it. For most skilled nursing residents who need an instrumental exam, bedside FEES gets your team accurate answers faster and without a trip out of the building. When we think an MBS would add information, we’ll tell you.
FEES vs. MBS questions
Is FEES or MBS better for nursing home residents?
Neither is better for every resident. Both are accepted instrumental swallow assessments. FEES is often preferred in nursing homes because it is done at the bedside without transport or radiation and uses real food. MBS is preferred when the oral phase or esophageal transit has to be seen.
Can FEES detect silent aspiration?
Yes. FEES directly shows penetration and aspiration before and after the swallow, including events with no cough response. It also shows secretions and residue that can raise aspiration risk.
Ready to bring FEES to your building?
Ask about adding your building, or book an in-service for your rehab team.