Alternating Pressure Mattress in Kenya
An alternating pressure mattress and a ripple mattress are the same device under two names. Clinical and procurement documents say alternating pressure mattress or APAM, medical literature says anti-decubitus mattress, and Kenyan retail says ripple mattress. The device lowers the interface pressure between the patient's skin and the support surface by inflating and deflating alternating sets of air cells, stopping capillaries from closing under sustained load. Devices under 9cm inflated height are classed as alternating pressure pads rather than full mattress systems. Clinical guidance on pressure ulcer prevention and risk assessment is published by NICE (CG179).
An alternating pressure mattress and a ripple mattress are the same product. The clinical name is alternating pressure air mattress, sometimes written as APAM or anti-decubitus mattress. In Kenya it is usually sold as a ripple mattress, and hospitals may also call it a pressure relief mattress, pressure care mattress or simply an air mattress. All of these describe a mattress with air cells that a pump inflates and deflates in alternating sets, so pressure on the skin shifts continuously. A complete set costs from about KSh 5,000 to KSh 13,000 in Kenya, and ours is KSh 6,000 with pump and warranty.
The names all mean the same thing
| Term you may hear | Where it is used |
|---|---|
| Ripple mattress | Common retail name in Kenya, UK and East Africa |
| Alternating pressure mattress | Clinical and procurement documents |
| Anti-decubitus mattress | Medical literature, from decubitus ulcer meaning pressure sore |
| Air mattress / air bed | Informal, though this also means a camping mattress, so confirm which is meant |
| Pressure relief mattress | General term covering both alternating and static pressure-redistributing surfaces |
| APAM | Abbreviation in tender and procurement documents |
| Bedsore mattress | Plain-language name used by families |
If a nurse or doctor has written down a term you do not recognise, it is almost certainly one of these. Send it to us on WhatsApp and we will confirm.
Alternating pressure versus static pressure redistribution
There are two families of pressure care surface, and the distinction matters. An alternating pressure mattress uses a pump to actively cycle air between two sets of cells, so the loaded areas of skin change every few minutes. A static or constant low pressure surface, such as a high specification foam or gel overlay, spreads weight over a wider area but never removes load from any point. Active alternating surfaces are the stronger intervention for patients at high risk or with existing ulcers. Static surfaces are quieter, need no power, and suit lower risk patients or settings with unreliable electricity.
What the pressure ulcer stages mean
Clinicians grade pressure damage in four stages. Stage 1 is intact skin with redness that does not blanch when pressed. Stage 2 is partial thickness loss, an open blister or shallow wound. Stage 3 extends through the full thickness of skin into fat. Stage 4 reaches muscle, tendon or bone. An alternating pressure mattress is a prevention and support tool across all stages, but it is not a treatment on its own from stage 2 upward. If you are seeing broken skin, the mattress is one part of a plan that needs a clinician, wound dressing and attention to nutrition.
Specifications to check when buying in Kenya
- Cycle time. Typically 6 to 12 minutes for a full alternation. Very long cycles reduce the benefit.
- Cell height. Around 6cm for bubble type, 10cm and above for tubular column type.
- Weight capacity. Confirm it covers the patient with margin, not exactly.
- Cover. Waterproof, vapour-permeable, latex-free, wipeable, low friction.
- Pump. Adjustable pressure, cleanable filter, quiet operation, low power draw.
- Static mode. Some pumps offer a constant-pressure setting for transfers and dressing changes. Useful, not essential.
- CPR or rapid deflate. Required in clinical settings so the surface can be flattened fast in an emergency.
Power and reliability in Kenyan conditions
The pump must run continuously, so power reliability matters. Draw is low, usually comparable to a phone charger, so a small inverter or UPS can keep it cycling through an outage. If your area has frequent long outages, plan for that at purchase rather than discovering it at 2AM. During an outage the cells hold air for a period and the mattress still works as a static surface, so reposition the patient manually until power returns.
Order a ripple mattress with pump
Complete set at KSh 6,000, down from KSh 8,500. Same-day delivery in Nairobi, pay on delivery after you inspect it. Countrywide courier after a phone confirmation.
Pressure ulcer stages, and which surface each calls for
| Stage | What you see | Surface usually indicated |
|---|---|---|
| At risk | Intact skin, limited mobility, cannot reposition unaided | Bubble cell alternating pressure overlay |
| Stage 1 | Redness that does not turn pale when pressed. Skin intact | Bubble cell overlay, plus stricter repositioning |
| Stage 2 | Partial skin loss. Shallow open wound or blister | Tubular column system. Clinical wound care required |
| Stage 3 and 4 | Full thickness loss, exposed fat, muscle or bone | Tubular column or low air loss. Specialist management |
Once skin is broken this is a clinical problem, not a purchasing one. A mattress supports treatment. It does not treat the wound.
Static mode versus alternating mode
Better pumps offer two modes and the distinction matters more than most buyers realise.
- Alternating mode. Two sets of cells inflate and deflate on a cycle, typically every few minutes. Load leaves each area of skin repeatedly. This is the mode that prevents and treats pressure damage.
- Static mode. All cells hold a constant lower pressure. Used during transfers, dressing changes, physiotherapy, meals, or for a patient who finds the cycling motion distressing. It gives pressure redistribution but no cyclic relief, so it is a temporary setting, not a resting state.
A single-mode pump alternates and nothing else. That is most of the price difference between an entry-level Kenyan set and a KSh 27,900 multi-mode system.
How to specify one in a Kenyan tender
Procurement documents rarely say ripple mattress. The terms that appear are alternating pressure air mattress, APAM, or anti-decubitus mattress. A usable specification states:
- Cell type and inflated cell height in cm
- Minimum rated patient weight in kg
- Pump modes required, alternating only or alternating plus static
- Cycle time in minutes
- Cover: fluid-resistant, wipe-clean, latex-free
- CPR or rapid-deflate function where the unit is for acute care
- Warranty period and local service route
Ripple Mattresses Kenya supplies to facilities and quotes against written specifications. Bulk and tender enquiries are covered on the hospitals and care homes page.
Common questions
Is an alternating pressure mattress the same as a ripple mattress?
Yes. Alternating pressure mattress is the clinical name, ripple mattress is the common retail name in Kenya. Same device.
What does anti-decubitus mean?
Decubitus ulcer is the medical term for a pressure sore, so anti-decubitus mattress simply means a mattress designed to prevent pressure sores.
Is an air mattress the same thing?
Not necessarily. A camping air bed is also called an air mattress. A medical air mattress has a pump that alternates pressure between cells. Confirm which is meant before buying.
Do I need alternating pressure or is a foam overlay enough?
For a patient at high risk, fully immobile, or with existing sores, alternating pressure is the stronger option. For lower risk patients on short term bed rest, a good foam overlay may be sufficient.
What does one cost in Kenya?
About KSh 5,000 to KSh 13,000 depending on cell type and build. Ours is KSh 6,000 complete with pump, tubes and a 6-month warranty.