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Bariatric and Specialty Dolphin FIS Configurations

This group covers everything in the Dolphin FIS line that is not a 35-inch bed surface: the 42-inch wide mattress, the 48-inch bariatric mattress, the seated and transport pads, and the pediatric and crib systems. They share a technology and almost nothing else. The weight ratings in this group run from 250 lb on the wheelchair cushion to 1,000 lb on the 48-inch bariatric mattress, and mixing those figures up is the single most consequential mistake anyone makes on this part of the site. Dolphin, Dolphin FIS, Fluid Immersion Simulation and AutoVector are registered trademarks of Joerns Healthcare LLC. We are an authorized Joerns dealer.

One correction before anything else, because it comes up constantly. The 42-inch surface is the wide one, not the high-capacity one. Joerns groups the 35-inch and 42-inch widths in the same specification block at 500 lb, and publishes 1,000 lb against the 48-inch configuration only. If someone has quoted you a capacity for a 42-inch Dolphin between those two numbers, ask which Joerns document it comes from. We checked the manufacturer’s spec sheet, its user-service manual and its product page, plus three independent retailer listings, and none of them supports a figure in between.

Scale drawing

Width and rated capacity are not the same thing

Dolphin FIS surface widths at 82 inches long, with the rated weight capacity of each A scale drawing. 35 inches wide, 42 inches wide, 48 inches wide — all 82 inches long, drawn to one scale so the widths compare directly. Below the footprints a bar for each width shows its rated weight capacity: 35 inch, 500 pounds; 42 inch, 500 pounds; 48 inch, 1,000 pounds. The 35 inch and 42 inch bars are the same height as each other; the 48 inch bar is 2 times as tall. 82″ long 35″ 42″ 48″ RATED WEIGHT CAPACITY 500 lb 500 lb 1,000 lb

The same three figures, in words: every surface above is 82″ long, and only the width changes.

35″ × 82″
rated 500 lb — Standard Dolphin FIS, Low-Profile System
42″ × 82″
rated 500 lb — Wide 42-Inch
48″ × 82″
rated 1,000 lb — Extra-Wide 48-Inch

Wider across is not the same as higher rated. The 42-inch surface is 7 inches wider than the 35-inch and carries exactly the same 500 lb rating. The rating steps up once, at 48 inches, to 1,000 lb. Anyone quoting you a figure between the two is quoting something no Joerns document contains.

Joerns states these as mattress capacities only. The bed frame underneath has its own rated load, and the combined weight must not exceed it — which is one of the things we check with you before anything ships.

Which one fits the need?

More room across for a person within 500 lb Wide 42-Inch 42" × 82" × 10", rated 500 lb — the same rating as the 35-inch, with seven inches more width for turning and for two caregivers to work.
A person over 500 lb Extra-Wide 48-Inch 48" × 82" × 10", rated 1,000 lb. The only Dolphin configuration at that capacity, and it needs a bariatric frame rated for the person underneath it.
A wound in someone who sits out for several hours a day Seating & Transport Pads The 17" × 17" × 4" wheelchair cushion, rated 250 lb, covers the seated hours a bed surface cannot. Fit it to the chair’s seat pan, with the seating clinic’s specification if there is one.
Therapy that continues through a transfer or a procedure Seating & Transport Pads The 36" × 76" × 5" stretcher pad is rated 700 lb, and Joerns states the 12 hour battery life allows for active therapy even during patient transport.
A child, from a neonate to an adolescent Pediatric & Crib Joerns states the pediatric system accommodates patients from 5 lb to 300 lb. What a particular child needs is the pediatric team’s decision, and we supply to their specification.
A hospital or home crib that needs a therapy surface Pediatric & Crib Two published crib sizes, US at 29.5" × 57" × 5" and International at 28" × 50" × 4". Measure the inside of the crib base before ordering; a crib surface has to fill the crib.

What fluid immersion simulation does differently

Alternating pressure and low air loss are the surfaces most people have already been offered, and they are the categories a payer recognises. The mechanism here is a different one.

Schematic

Two different mechanisms, drawn side by side

Alternating pressure

Discrete cells, inflating and deflating in cycle

Schematic of an alternating pressure surface A simplified side view. A row of separate air cells stands on a flat platform. Some cells are tall and inflated, the ones between them are short and deflated, and small arrows show each about to swap. An abstract body outline rests on top of the inflated cells, touching the surface only at those raised points, and the drawing is labelled to say the cycle repeats so the loaded points keep changing. the cycle repeats load moves between contact points

Fluid immersion simulation

One continuous envelope, sensor-driven

Schematic of a fluid immersion simulation surface A simplified side view drawn to match the panel beside it. Instead of separate cells there is one continuous surface whose upper edge curves down into a smooth basin, and the same abstract body outline sits down inside that basin rather than on top of it. Evenly spaced arrows along the whole length of the contact stand for support spread continuously rather than concentrated on raised points, and a dashed two-headed arrow runs between the surface and a control module box, standing for the sensing loop. AutoVector® control module no cells, no cycle

Alternating pressure. An air pump inflates and deflates separate cells in sequence, so the areas carrying the load keep changing on a repeating cycle. At any one moment the body is resting on the cells that happen to be inflated. This is the mechanism behind the Medicare Group 2 powered surfaces, alongside low air loss.

Fluid immersion simulation. There is no cycle and no sequence of cells. Joerns describes the system as automatically measuring a patient’s anthropometric characteristics as they engage the surface and producing an individualized immersion profile that creates a near neutrally buoyant state, with the AutoVector® control module monitoring the support surface more than 100 times per second.

Both panels are schematics. Neither is to scale, and neither is a cutaway or a drawing of any real product. A Dolphin FIS is also not an air-fluidized bed — that is a different device again, one that circulates warm air through silicone-coated ceramic beads.

Width is not capacity

These are two separate specifications and people needing one often ask for the other. Width is about room — room for a broad set of shoulders, a large abdomen that shifts when someone rolls, contractures that hold a limb out from the body, or two caregivers working on the mattress at the same time. Capacity is about load. A person can be well within 500 lb and still have nowhere to turn on a 35-inch surface, and a person over 500 lb needs the rating regardless of how they are shaped.

So the 42-inch surface answers a room problem at the standard rating, and the 48-inch answers a load problem. Joerns states the system is designed as a therapeutic mattress system for patients weighing up to 1,000 pounds and is customizable to fit bed frames, including bariatric bed frames, up to 48 inches wide. Above 500 lb, the 48-inch is the only configuration in this line, and it comes with a frame requirement rather than a preference.

Whatever the surface, the capacity figure is the mattress figure. Joerns footnotes every one of them: total weight must not exceed the bed frame manufacturer’s specified load capacity. Bariatric frames publish a patient limit and a total limit including mattress and accessories; the patient limit is the one to hold the person’s charted weight against, and it is frequently lower than the surface’s rating.

  • Wide 42-inch mattress: 42" × 82" × 10", rated 500 lb — the same as the 35-inch
  • Extra-wide bariatric: 48" × 82" × 10", rated 1,000 lb — the only configuration at that figure
  • Wheelchair cushion: 17" × 17" × 4", maximum safe working load 250 lb, 5 lb
  • Stretcher pad: 36" × 76" × 5", maximum safe working load 700 lb, 14 lb
  • Pediatric therapy mattress: accommodates 5 lb to 300 lb
  • Crib, US: 29.5" × 57" × 5". Crib, International: 28" × 50" × 4". Joerns states 250 lb for the crib.

Bariatric orders are frame orders

The surface is the light part. Joerns lists the therapy mattress at 22 lb and the AutoVector control unit at 10 lb, which is why people are surprised when a five-figure therapy system arrives in two manageable pieces. What is not light is the bariatric frame underneath, and that is where a bariatric order is won or lost. A 48-inch surface needs a 48-inch deck rated for the person; a 42-inch surface needs a 42-inch deck. Neither is adjustable by arranging it carefully.

Fit on a wide bed matters for the same reason it matters on a narrow one, and the warning is the manufacturer’s rather than ours. Joerns states that the risk of entrapment can arise when equipment is placed on bed frames that leave gaps of even a few inches between the therapy mattress and the head panel, foot panel and bed or side rails, and that the equipment is not to be used when such gaps are present. Three inches of gap at the hip on each side of a 42-inch surface sitting on a 48-inch deck is exactly that situation.

Then there is the room. A wide bed needs floor space on both long sides if two caregivers and a lift will work there, a route in that frame sections can turn through, and a floor that will take the loaded bed where you intend to put it. We ask about door widths, stair turns and landing corners on these orders because the questions are cheap before delivery and expensive afterwards.

The hours out of bed: seated and transport surfaces

A therapy surface in the bed protects the lying hours. A person who then sits for four hours a day on an ordinary foam cushion has four unprotected hours, and seated loading concentrates weight over a much smaller area than lying does. That is the gap the Dolphin wheelchair cushion and stretcher pad exist to close, and they are two genuinely different products with two very different ratings.

The wheelchair cushion is 17 by 17 by 4 inches, weighs 5 lb, and Joerns gives its maximum safe working load as 250 lb — the lowest figure in the range by a wide margin, and a firm limit rather than a guideline. The stretcher pad is 36 by 76 by 5 inches, weighs 14 lb, and Joerns gives its maximum as 700 lb. Joerns notes on this line that the 12 hour battery life allows for active therapy even during patient transport, which is the clearest statement of what a transport surface is for.

What a wheelchair user should sit on is an occupational therapy or seating clinic decision, made against the chair, the posture, the transfers and the skin history. A 17-inch cushion is one seat size among many, and a therapy cushion in a badly fitting chair does not fix the chair. If a seating clinic is involved, their specification governs and we supply to it.

Pediatric and crib systems

Joerns states that the pediatric system accommodates patients from 5 lb to 300 lb, with 5 lb given as the system minimum. That range covers neonates through to adolescents and young adults still in pediatric services, which is a wider clinical span than any other product in the line. The crib therapy mattress comes in two published sizes: US at 29.5 by 57 by 5 inches, International at 28 by 50 by 4 inches. Seven inches apart in length, and not interchangeable.

Crib fit deserves its own sentence. Crib internal dimensions vary by manufacturer and by market, and a crib surface that does not fill the crib is a safety problem before it is a therapy problem. Measure the inside of the crib base, width and length, and send us both figures before ordering. Joerns’ entrapment warning applies with more force in a crib than anywhere else on this site.

We are deliberately cautious in pediatric copy. A great deal of pediatric pressure damage is device-related — tracheostomy flanges, splints, casts, gastrostomy buttons — rather than caused by the surface underneath, in which case a therapy mattress does not address the cause. What a child needs is the pediatric team’s decision: the wound or ostomy nurse, the physician, the complex care coordinator. Bring us their specification and we will match it.

How these are paid for, and what we will not claim

Everything in this group is bought or rented privately. We do not bill Medicare and we do not submit claims on your behalf. Fluid immersion simulation has no HCPCS code of its own, and a Dolphin FIS is not an air-fluidized bed: E0194 is defined by warm filtered air forced through silicone-coated ceramic beads, and CMS includes heavy-duty and bariatric air-fluidized devices under that same single code — which is precisely why people looking at a bariatric therapy surface sometimes assume it applies here. Joerns’ own claim is 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. That is a comparison to a technology, not a coding equivalence.

Where a covered route exists, it is usually one tier down. Group 2 powered surfaces — E0277, E0371, E0372 and E0373 — are covered where a beneficiary meets at least one of three conditions: multiple stage 2 ulcers on the trunk or pelvis that have failed to improve over the past month on a comprehensive ulcer treatment program; large or multiple stage 3 or stage 4 ulcers on the trunk or pelvis; or a myocutaneous flap or skin graft for a pressure ulcer on the trunk or pelvis within the past 60 days with a Group 2 or Group 3 surface in place immediately before a discharge in the past 30 days. A Standard Written Order must reach the supplier before a claim is submitted. If your clinician can document any of that, ask them about a Group 2 surface before you talk to us.

On the private side, a mattress is a dual-purpose item, so it is not on a pre-approved HSA or FSA eligibility list on its own. A Letter of Medical Necessity from a licensed clinician — naming the condition, the item, why it is needed for that condition and a duration — is the mechanism that changes that, and your plan administrator applies the IRS rules and decides. We provide an itemised receipt suited to substantiation. We do not draft the letter, pre-fill one, or tell you a claim will be paid. Veterans’ health networks purchase and lease through their own contracting channels rather than Medicare DME rules; we sell and lease into that route and will explain the process we actually run rather than naming a schedule we cannot show you.

Discharge coming up

Coming home from hospital in the next day or two?

Send us a note with the discharge date and the surface the care team has recommended. What can arrive in time depends on stock, the freight lane and the hour you call, so the earlier the better.

Other equipment Standard Systems

Questions people ask us

Is the 42-inch Dolphin FIS the bariatric model?
It is the wide model. Joerns groups the 35-inch and 42-inch widths in the same specification block at 500 lb and publishes 1,000 lb for the 48-inch configuration only. So the 42-inch gives seven inches more room across at the standard rating. If the person is above 500 lb, the 48-inch extra-wide surface is the one to ask about.
What is the highest weight any Dolphin surface takes?
Joerns states the therapy mattress maximum safe working load as 1,000 lb, or 454.5 kg, and publishes that figure against the 48-inch bariatric configuration. Joerns’ product page describes the range across the line as 500 to 1,000 lb depending on configuration. Every capacity is the mattress figure only; total weight must not exceed the bed frame manufacturer’s specified load capacity.
What are the ratings on the seated and transport pads?
Joerns gives the wheelchair cushion maximum safe working load as 250 lb, or 113.6 kg, and the stretcher pad maximum as 700 lb, or 318.1 kg. Those are two different products with two different figures, and neither is the mattress figure. The cushion is 17 by 17 by 4 inches; the pad is 36 by 76 by 5 inches.
How small a patient can the pediatric system take?
Joerns states that the system accommodates patients from 5 lb to 300 lb, with 5 lb, or 2.3 kg, given as the pediatric system minimum. Whether it is appropriate for a particular child is a question for the pediatric team; Joerns’ manual also carries specific setup guidance for very light patients, which belongs with the nurse or therapist commissioning the surface.
Which crib size do I need?
Measure the inside of the crib base rather than guessing. Joerns publishes a US crib mattress at 29.5 by 57 by 5 inches and an International crib mattress at 28 by 50 by 4 inches. They differ by an inch and a half in width, seven inches in length and an inch in depth, and a crib surface that leaves gaps at the panels or rails should not be used.
Do bariatric configurations need a special bed?
Yes. A 48-inch surface needs a 48-inch deck rated for the person, and Joerns describes the system as customizable to fit bed frames, including bariatric bed frames, up to 48 inches wide. Bariatric frames publish a patient limit and a total limit including mattress and accessories; compare the person’s charted weight against the patient limit, which is often the lower figure.
Can I use a Dolphin mattress and a Dolphin cushion together?
People do, because they cover different hours of the day. Whether both are warranted is a question for the wound care nurse, and the answer differs for a sacral wound in someone who lies flat and an ischial wound in someone who sits all afternoon. If budget forces a choice, ask the care team which hours matter most for this wound rather than buying both by default.
Will insurance pay for any of these?
We cannot tell you it will, and we do not bill Medicare or submit claims. Fluid immersion simulation has no HCPCS code, Dolphin FIS is not an air-fluidized bed, and wheelchair seating falls under a different Medicare benefit from bed surfaces. Ask your clinician whether a covered Group 2 powered surface is appropriate first. For private payment, a Letter of Medical Necessity is the usual route and your plan administrator decides.

Rent or buy bariatric & specialty

Phone with the date it has to be in the room and who it is for, or send the details online and we will confirm the model, the price both ways and the freight lane.

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