How to choose an electric hospital bed: a buyer's specification guide

Buying hospital beds is one of those purchases where the specification sheet is easy to read and hard to interpret. Two beds can list the same seven parameters and behave completely differently on a ward. This guide goes through the decisions in the order they actually matter, using the engineering data from beds we build ourselves.

Start with the ward, not the catalogue

The single most common procurement mistake is choosing a bed and then working out where it goes. It produces two symptoms: ICU-grade beds sitting in rehabilitation wards where nobody uses the tilt, and basic beds in high-dependency rooms where staff needed height adjustment and did not get it.

Work the other way. For each ward, write down four things:

1. What happens to patients here? Are they ventilated? Recovering from surgery? Long-stay and mobile? Is cardiac arrest a realistic event?
2. Who moves the patient, and how often? Transfers and repositioning are what drive height adjustment and rail requirements.
3. What is the heaviest patient you realistically admit?
4. What is the maintenance reality? Is there a biomedical engineering team, a reliable mains supply, a spare-parts budget?

Those four answers determine most of the specification before you look at a single product page.

Decision 1: function count

"Functions" counts the powered adjustment axes. The industry convention is consistent enough to rely on:

There is no four-function convention in common use; a bed advertised as "four-function" usually means three powered axes plus a manual one, and is worth questioning.

The jump that buys the most clinical value per unit of cost is two to three functions — that is, adding electric height adjustment. Height adjustment is the function that prevents nursing back injuries, and injured staff cost more than beds. The jump from three to five is a genuine clinical capability (postural drainage, anti-shock positioning, surgical prep) but only pays for itself where those positions are actually used.

For reference, in our own range the KL-BC105 is a two-function bed, the KL-BC104 is three-function, and the KL-BC101 is a five-function ICU platform.

Decision 2: height range

Height adjustment is specified as a range, and both ends matter for different reasons.

The low end is a patient-safety figure. A bed that descends to around 480 mm lets an average adult sit on the edge with feet flat on the floor — which is what makes an unassisted transfer safe and what reduces the injury severity if a patient rolls out. A bed whose minimum is 600 mm is a normal-height bed, not a low bed, and will not deliver that.

The high end is a staff-safety figure. Around 760 mm brings the patient surface to a working height where a nurse can wash, dress a wound or change bedding without bending. Note that the working height is the bed surface plus the mattress, so a 100 mm mattress effectively adds 100 mm to both ends of the range.

A 480–760 mm range, as on the KL-BC101 and KL-BC104, covers both requirements. If a tender specifies a narrower range, check which end has been sacrificed.

Decision 3: safe working load

Safe working load (SWL) is the total the bed is rated to carry: patient, mattress, bedding, and anything resting on the bed. It is not a patient weight limit, although it is very often read as one.

Two figures dominate the market: 200 kg and 240 kg. The arithmetic is worth doing explicitly. A 150 kg patient plus a 15 kg mattress plus bedding, plus a member of staff kneeling on the bed during CPR, is already close to 200 kg. On any ward that might admit bariatric patients, specify 240 kg and treat it as headroom rather than as a target.

There is more on this in our separate article on what safe working load actually means.

Decision 4: tilt

Trendelenburg (head down) and reverse Trendelenburg (head up) are whole-bed tilts, distinct from backrest elevation. Typical hospital beds offer around 13°, which is enough for postural drainage, anti-shock positioning and surgical preparation but is not the steep tilt of an operating table.

Tilt is the clearest example of a function that is either clinically required or pure cost. In ICU, HDU, emergency and surgical recovery, specify it. In general medical, rehabilitation and long-term care wards it will almost never be used, and the money is better spent on height adjustment or a better mattress.

Decision 5: CPR release, nurse lock and angle indicator

Three features that cost little individually and are worth checking are genuinely present rather than implied:

• CPR instant release drops the backrest flat in a single action. In a cardiac arrest this saves seconds that matter. Ask how it is actuated — a lever that a nurse can hit with one hand while already starting compressions is not the same as a sequence on a handset.
• Nurse lock disables the patient-side controls. On confused, sedated or paediatric patients this is a safety feature, not a convenience. Check which axes the lock covers and whether it can be locked selectively.
• Angle indicator — a mechanical readout, typically 0–90°, showing backrest angle. It matters more than it looks: ventilator-associated pneumonia prevention protocols specify a backrest angle (commonly 30–45°), and "looks about right" is not a measurement.

Decision 6: side rails

Side rails are the most-handled part of a hospital bed and the most frequently damaged. The material choice is a real decision:

• Aluminium alloy and stainless steel rails are the durable option, and hold up to heavy use and aggressive disinfection. See the KL-HL001 rail range.
• ABS rails are lighter, quieter to operate, warmer to the touch and cheaper to replace when broken. See KL-HL002.

Neither is simply better. The question is which failure mode you would rather have: a metal rail that survives the trolley impact and transmits the damage to the frame, or an ABS rail that cracks and is replaced for a small fraction of the bed's cost. For wards with high trolley traffic, ABS plus a stock of spares is often the cheaper ten-year decision.

Also check the split: full-length rails versus two- or four-section rails. Sectioned rails allow a patient to exit the bed midway without dropping a full rail, which matters in rehabilitation.

Decision 7: castors

Castors are where cheap beds are cheapest, and where the cost surfaces later. Specify:

• Diameter — larger castors roll over thresholds and lift edges that stop small ones.
• Braking — central braking (one pedal locks all four) is far safer than four individual brakes, because a bed with three brakes applied is a bed that moves during a transfer.
• A directional lock on at least one castor, which is what makes a bed steerable down a corridor instead of crabbing.
• Tread material compatible with your floors, and non-marking if you have vinyl.

Our KL-CA011 castor range is catalogued separately precisely because castors are a consumable, not a permanent part of the bed.

Decision 8: the mattress is part of the bed

A bed and a mattress are one system and should be bought as one. Two specific traps:

• A flat mattress on an articulating bed bridges the joints when the backrest rises, which both reduces the effective angle and creates shear against the patient's skin. A segmented three-section mattress follows the bed surface.
• Size mismatch. The bed surface figure — commonly 1930 × 900 mm — is the dimension the mattress must match. A mattress 40 mm short leaves a gap at the head or foot that is an entrapment risk.

Where pressure-injury prevention is a clinical requirement, an alternating-pressure air mattress belongs in the specification from the start rather than as a later purchase.

A worked example

A 120-bed district hospital with a 12-bed ICU, a 10-bed surgical recovery unit and the remainder general medical and surgical:

• ICU and recovery (22 beds) — five-function electric, 240 kg SWL, CPR instant release, nurse lock, angle indicator, tilt both ways, central-brake castors, alternating-pressure air mattresses.
• General wards (98 beds) — three-function electric, 200 kg SWL for most, a small number at 240 kg for bariatric admissions, ABS rails with spares, segmented foam mattresses.
• Spares — castors, ABS rails and headboards for roughly 5% of the fleet, purchased with the beds.

The common error would be buying 120 five-function beds "for flexibility". That spends a large amount of money on tilt mechanisms that 98 wards will never actuate, and typically forces a compromise on mattresses — which is the component the patient is actually lying on.

Before you issue the order

Ask your supplier for four things, in writing, and be wary if any of them is hard to get:

1. A signed datasheet for the exact configuration, with tolerances stated.
2. The CE certificate and ISO 13485 certificate, current and dated.
3. Packing dimensions, gross weight and units per container, because on a high-volume, low-value product the loading figure moves landed cost more than the unit price.
4. A spare-parts price list for castors, rails, headboards, handsets and actuators.

If you want a second opinion on a specification you have been sent, send it to our engineers — we will tell you what it means, including where a competitor's bed is the better fit.