Domus 4 Alternating Pressure Mattress, 10 Minute Cycle, 450 lb

The Domus 4 is a powered alternating pressure and micro low air loss mattress replacement from Wellell, distributed in Canada by Permobil. It measures 35.5 by 79 by 8 in and is rated 450 lbs.

What does it do and how does it work?

• The pump alternates the cells on a 10-minute cycle, shifting pressure as the bladders inflate and deflate.
• A constant low pressure (static) mode holds the surface steady, and max inflate firms it for care tasks.
• Seat inflation supports the person in a Fowler position.
• The cell-on-cell bladder at the sacrum keeps a lower air layer to avoid bottoming out.
• Visual and audible alarms warn of a fault; settings lock after five minutes.
• A CPR release valve lets a caregiver deflate the surface quickly.

Who is it for?

• Permobil describes it for clients at medium to high risk of pressure injuries, with low air loss for microclimate control.
• A nurse, doctor or therapist should decide whether it matches the person's assessment.
• It supports a care plan; it does not replace repositioning.

Will it fit the bed?

• 35.5 in wide, 79 in long and 8 in high (90 by 201 by 20 cm).
• A gap filler extends the surface to 84 in for longer decks.
• 450 lbs is the mattress rating; the bed frame and rails carry their own limits, and the lowest applies.
• This standard model has no foam transfer edges. Add-on bolsters with R5 covers and 6 in firm transfer edges convert it to a 48 in Domus Edge; the separate Domus 4 Edge is that raised-edge build.
• Check the rail gaps. Health Canada recommends under 120 mm (4 3/4 in) within and under the rail, and under 60 mm (2 3/8 in) at the rail ends. See bed rails.
• A used mattress cannot be returned. Measure first and read the return policy.

What happens in a power cut?

• Alternation and low air loss stop without power; the cell-on-cell layer may keep some passive support.
• The CPR valve empties the surface quickly when needed.
• Learn the alarm and outage response first, and follow the care team's written plan.

How is it cleaned?

• The quilted top cover zips off in one step for cleaning or replacement.
• Follow the facility's cover and cell protocol; inspect seams and tubing at each linen change.
• Confirm the cover package that arrives; the Canadian and North American descriptions differ.

How does it compare?

• Domus 4 Edge: the same therapy with raised foam transfer edges.
• Med-Aire 14027: a simpler powered replacement, rated 350 lbs.
• Serene Air: another powered low air loss surface with different widths.

Funding may help: see who may help pay.