Clinical applications
Where fluid immersion simulation is used
This section is for reading, not for buying. It explains the situations in which a fluid immersion surface is used, what the categories of support surface actually are, and what the manufacturer says about each application — in the manufacturer’s own hedged terms, because those are the only terms anyone can stand behind.
Nothing here is medical advice, and none of it substitutes for the person who has examined the patient. A support surface is one part of a care plan that also contains repositioning, wound care, nutrition, moisture management and assessment. Joerns says as much itself: its clinical indications are guidelines and should be taken only as recommendations for consideration during individual patient assessment by the clinician.
If you have arrived here frightened — because of a stage that was named, or a wound that is not closing — read the staging guide first. It answers the question plainly and does not sell into it.
Where this surface is used
Pressure Injury Stages
The NPIAP pressure injury stages in plain language, what hospitals do to prevent them, and how low air loss, air-fluidized and fluid immersion surfaces differ.
Read moreFlaps & Grafts
What happens after a myocutaneous flap or skin graft, whether a stage 4 pressure ulcer can heal without surgery, and where a therapy surface fits.
Read moreSpinal Cord Injury
Skin protection after spinal cord injury: why the bed and the wheelchair are two separate decisions, what Joerns indicates, and how funding works.
Read morePalliative & Comfort Care
When the goal becomes comfort: what a therapy surface can and cannot do in palliative care, why to ask hospice first, and what families are left holding.
Read more- Written for
- Families, caregivers and clinicians reading up
- Source
- Joerns product documentation and CMS policy, cited as such
- Not included
- Prognosis, healing times, outcome figures — none exist in the sources
- Decisions
- Belong to the care team, not to an equipment supplier
How surface decisions are usually made
- 1
Assessment
Risk assessment and skin inspection by a licensed practitioner, and staging of any existing injury. This is what everything downstream is built on.
- 2
A treatment program, not a product
Repositioning, wound care, moisture and incontinence management, nutritional assessment and intervention, and an appropriate support surface. The surface is one element of several.
- 3
Escalation by category
Non-powered surfaces first in most protocols, then powered surfaces where criteria are met, then the air-fluidized bed for the narrowest set of situations.
- 4
Reassessment
Whether an ulcer is improving decides whether the plan changes. For some covered surfaces, that reassessment is a formal requirement with a monthly clock on it.
The four guides in this section
Pressure injury stages and surfaces is the main one. It explains the staging definitions in plain language, sets out what each category of support surface does, and draws the comparison people search for most: how a fluid immersion surface differs from a low air loss or alternating pressure mattress, and why that difference matters for coverage as well as for mechanism.
Flaps, grafts and burn recovery covers the post-operative situation, where the concern is protecting a repair rather than only offloading a wound. Spinal cord injury covers a population Joerns names specifically, with the condition Joerns attaches to it. And palliative and comfort care covers the situation where the goal is not healing but comfort, and where the questions a family asks are different ones.
- Pressure injury stages and surfaces — staging, categories, and the mechanism comparison
- Flaps, grafts and burn recovery — surfaces after a myocutaneous flap or skin graft
- Spinal cord injury — including the stabilization and physician-clearance condition
- Palliative and comfort care — comfort-focused decisions and what changes
What fluid immersion simulation is, as Joerns describes it
Joerns describes Dolphin® Fluid Immersion Simulation® as technology that automatically simulates a fluid environment, maintaining near normal blood flow, minimizing soft tissue distortion, and optimizing tissue oxygenation. The system measures the patient’s specific anthropometric characteristics as they engage the surface, producing what Joerns calls an individualized immersion profile that creates a near neutrally buoyant state, and the AutoVector® control module monitors the surface more than 100 times per second for movement or changes.
On indications, Joerns states that the technology is highly effective for the prevention and healing of pressure injuries through Stage 4, as well as for treating patients with post-operative flaps and grafts, and that it may also be used for patients whose medical condition precludes turning and repositioning or where those interventions may be contraindicated, and for patients with spinal cord injury once the acute injury has been stabilized and these patients have been cleared by a physician. Joerns adds that the system delivers many of the best elements of air-fluidized therapy, such as three-dimensional volumetric engagement and the elimination of gradient shear forces, and that it has been demonstrated to reduce the risk of pressure ulcer formation as part of protocols for the prevention and treatment of pressure ulcers.
Read that last phrase carefully, because it is the honest shape of the claim: as part of protocols for. A surface participates in a plan. It does not replace turning schedules, wound care, nutrition or clinical judgement, and anyone who tells you a mattress heals a wound is selling you something.
What we do not publish here, and why
No healing times. No outcome percentages. No patient stories, before-and-after photographs or clinician testimonials. Not because they would not be persuasive, but because none exist in any source we can show you, and inventing them for a page read by someone managing a stage 4 injury would be the worst thing this site could do.
No prognosis either. Whether a particular wound will heal, how long it will take, and what it means that it has not closed yet are questions for the people treating the patient, who have examined them and know the rest of their history. We can tell you what a surface does mechanically and what a manufacturer claims for it. We cannot tell you what will happen, and a supplier who offers to is guessing.
Where coverage enters a clinical conversation
It enters earlier than most families expect, because the categories used by clinicians and the categories used by payers are not the same categories. Low air loss and alternating pressure surfaces are coded Medicare Group 2 items. The air-fluidized bed is the single Group 3 code, E0194. Fluid immersion simulation has no HCPCS code of its own, and a Dolphin FIS is not an air-fluidized bed.
That matters clinically as well as financially: it means that the surface a care team names and the surface a benefit will pay for can be two different things, and that conversation is better had early. The insurance section sets out the criteria in full, and if a covered Group 2 surface would meet the need, that is the answer we will point you toward.
Questions worth taking to the care team
- What stage is the injury, and where is it?
- What does the current treatment program include, and for how long has it been running?
- What surface is the patient on now, and is it the right category?
- Would a covered Group 2 surface be appropriate here first?
- What would have to change for a different surface to be recommended?
- How often should skin be inspected, and by whom?
- What is the repositioning plan, and does the surface change it?
- Who reassesses, and when?
Questions people ask us
Does a therapy surface heal a pressure injury?
Does using this surface mean the patient no longer needs turning?
How is this different from a low air loss mattress?
Can you tell me whether this will work for my relative?
Is this equipment used in hospitals?
Questions about a specific situation?
Take the clinical ones to the care team treating the patient. Bring us the practical ones — what the surface is, what it costs to rent or to buy, and whether it fits the bed — and we will answer those plainly.