CHPSO patient safety alert supplement—Air mattress settings change after being unplugged November 18, 2010
This supplement to the original alert serves as a reminder to
clinicians that they should always check and recalibrate air
mattress settings to the patient’s settings when reconnecting.
Mattresses, when unplugged, may revert to a default
setting.Additionally, though not mentioned in the first alert, on
occasion caregivers may use a mattress control unit for a new
patient without remembering to change the settings that were used
for the prior patient.
While the initial alert was from a hospital using Sizewise
mattresses, many if not all manufacturers’ mattresses function in
a similar manner and we expect that the same risks of improper
use are present.
Sizewise has provided the following information to assist its
If loss of power occurs, an alert will sound, and a back-up
battery will store patient settings for up to 5 minutes.
If the master power switch is turned off, patient settings
are not held in memory and default settings will resume when the
power switch is turned back on. The specific default settings are
25mmHg for the standard product and 30 mmHg for the bariatric
product, and a sampling rate of seven (7) times per second to
maintain the default setting.
Sizewise product control units manufactured starting in early
2010 now retain the most recent settings indefinitely, regardless
of a power loss or if the main power switch is turned off.
The International Electrical Code is continually upgraded and
improved upon, particularly in the area of hospital safety.
Sizewise prides itself on being ahead of both required and
voluntary changes to this code. The circuitry in the Pulsate
Blower in question is one of the products that is being upgraded
in real time this year, ahead of the IEC’s time line for
implementation. Fully 75 percent of our product in the field has
been upgraded. If you have units that need to be upgraded we are
able to do that quickly and easily. We will proactively make sure
your local reps help in that regard.
There are several ways to note the new upgrade. It is important
to understand that this upgrade is more of a fail-safe and that
existing units are by no means inoperable, or even sub-standard.
Here’s how to verify an upgraded unit:
The previous product version has BOTH a side panel hard
on-off switch and a single power push button on the front
interface panel. The newest product does NOT have the front panel
push-button interface for power.
The newest blower units will have an ETL label on the back of
the outside of blower case. Older units will not have this label
To further verify, the ETL label on the new units will have
The newest IEC code of IEC–60101–1–2.
A new amperage rating of 6.3 amps.
If you have any questions at all about the functioning of your
Sizewise mattress and which control unit you have, please contact
your local representative or call the Sizewise 24 hour support
line at 800-814-9389.