WarmTouch WT-5900 User manual

Model WT-5900 Patient Warming System
Operator’s Manual

© 2010 Nellcor Puritan Bennett LLC. All rights reserved.
To obtain warranty information contact your local Nellcor representative.

Operator’s Manual iii
Table of Contents
Safety Information ............................................................................................. 5
Overview........................................................................................................ 5
Safety Information........................................................................................ 5
Warnings ................................................................................................. 6
Cautions................................................................................................... 7
Introduction ........................................................................................................ 9
Overview........................................................................................................ 9
Intended Use ................................................................................................. 9
Manual Availability....................................................................................... 9
Background Information.............................................................................. 9
Safety Features............................................................................................ 10
Customized Warming Therapy............................................................. 10
Automatic Temperature Stepdown ..................................................... 10
Automatic Over Temperature Shutdown............................................ 10
Alarms.................................................................................................... 11
HEPA Filter............................................................................................. 12
Wheel Locks........................................................................................... 12
Symbols........................................................................................................ 13
Description of the Warming System.......................................................... 14
Installation ........................................................................................................ 17
Overview...................................................................................................... 17
Cart Installation........................................................................................... 18
IV Pole Installation...................................................................................... 19
Patient Bed Installation .............................................................................. 20
Using the Warming System ............................................................................. 21
Overview...................................................................................................... 21
Power Supply Cord...................................................................................... 21
Main Power ................................................................................................. 21
Temperature Control.................................................................................. 22
Air Filter....................................................................................................... 23
Self-Supporting Air Hose............................................................................ 23
Using WarmTouch™ CareQuilt™ and CareDrape™ Blankets ................. 23
Routine Maintenance ....................................................................................... 25
Overview...................................................................................................... 25
Cleaning the Warming System................................................................... 25
Routine Maintenance ................................................................................. 25

iv Operator’s Manual
Specifications .................................................................................................... 27
Overview...................................................................................................... 27
Warming System Specifications ................................................................. 27
Transport and Shipping in Shipping Container ........................................ 28
Compliance.................................................................................................. 28
Manufacturer’s Declaration ................................................................. 29
Electromagnetic Compatibility (EMC).................................................. 29

Overview
Operator’s Manual 5
1Safety Information
Overview
This manual contains information for using the WarmTouch™ Model WT-5900 patient
warming system. Before operating the warming system, thoroughly read the Operator's
Manual. The latest version of this manual is available on the Internet at:
http://www.nellcor.com/serv/manuals.aspx
Safety Information
This section contains safety information requiring users to exercise appropriate
caution while using the warming system.
The WARNING symbol identifies warnings.
Warnings alert the user to potential serious outcomes, such as death, injury, or
adverse events to the patient or user.
The CAUTION symbol identifies cautions.
Cautions alert the user to exercise care necessary for the safe and effective use
of the warming system.
The NOTE symbol identifies notes.
Notes contain important information that may otherwise be overlooked or
missed.

Safety Information
6 Operator’s Manual
Warnings
WARNING
Possible explosion hazard. Do not use the device in the presence of
flammable anesthetics.
WARNING
Possible electrical shock hazard. To reduce the risk of electrical shock do not
remove the back case. Servicing is only to be done by qualified personnel.
WARNING
Possible electric shock hazard. Grounding reliability can be achieved only
when the warming system is connected to a suitable mains outlet.
WARNING
Possible fire hazard. Prevent the blanket material from coming into contact
with a laser or an electrosurgical active electrode; rapid combustion could
result.
WARNING
Possible burn hazard. Do not apply heat directly to open wounds. All
patients’ wounds should be covered while using the warming system.
WARNING
Possible patient burns. Use caution and consider discontinuing use on
patients during vascular surgery when an artery to an extremity is clamped.
Do not apply the warming system to ischemic limbs.
WARNING
Possible patient burns. Use caution and monitor closely if used on patients
with severe peripheral vascular disease.
WARNING
If a malfunction occurs in the warming system, discontinue use. Notify your
sales/service center of the malfunction. The unit must be serviced by an
authorized service technician.
WARNING
No free-hosing. Keep hose nozzle connected to a WarmTouch™blanket at all
times or thermal injury may occur.

Safety Information
Operator’s Manual 7
WARNING
WarmTouch™CareDrape™and CareQuilt™blankets are for single patient
use only.
WARNING
The warming system should not be operated in the presence of
electromagnetic fields that are greater than 3 volts/meter. This could cause
shutdown of the warming system by the fail-safe function within the
equipment.
WARNING
The warming system is not suitable for use during magnetic resonance
imaging (MRI) scanning. The warming system may affect the MRI image.
WARNING
Continuously monitor the patient's temperature. Reduce the air temperature
or discontinue therapy when normothermia is reached.
WARNING
The patient must be closely monitored for rewarming. Vasodilation and
possible hypotension can occur. Use good judgment when selecting a
temperature. If unsure of proper setting, consult with the attending
physician.
WARNING
The use of accessories and power cables other than those specified may
result in increased emission and/or decreased immunity of the warming
system.
WARNING
Thermal injury may occur if the warming system hose comes into contact
with the patient.
WARNING
Using the warming system on transdermal medication patches may increase
the rate of drug delivery, potentially causing harm to the patient.
Cautions
Caution
Federal (U.S.A.) law restricts the use of the warming system to sale by or on the order
of a physician.

Safety Information
8 Operator’s Manual
Caution
The warming system is fitted with an air filter; however, airborne contamination
should be considered when using the warming system.
Caution
If the warming system is mounted on the intravenous (IV) pole, it should be installed
with the top of the unit’s handle less than 76 cm (30 inches) above the floor to
prevent the IV pole from tipping over.
Caution
If a malfunction occurs in the warming system, discontinue use. Notify your sales/
service center of the malfunction. Service is only to be done by qualified personnel.
Caution
The institution should follow local governing ordinances and recycling instructions
regarding disposal or recycling of filter and device components or end of life of the
product.
Caution
The HEPA filter must be changed every 2,000 hours of operation. Refer to the
Routine Maintenance section in the Service Manual for replacement procedures
requiring a qualified technician.
Caution
Do not spray, pour, or spill any liquid on the warming system, its accessories,
connectors, switches, or openings in the case.
Caution
Ensure the patient is dry or the warming system may be ineffective.

Overview
Operator’s Manual 9
1Introduction
Overview
This chapter provides an introduction to the WarmTouch™ Model WT-5900
patient warming system.
Intended Use
The WarmTouch™ Model WT-5900 patient warming system (warming unit and
blanket) is intended for prevention and treatment of hypothermia. For example,
with the surgical patient, the patient in the preoperative holding area, the
pregnant woman who shivers during epidural anesthesia due to hypothermia,
or any patient who is uncomfortable in the cold critical care environment.
Manual Availability
The most recent revision of this manual is available on the Internet at:
http://www.nellcor.com/serv/manuals.aspx
Background Information
There are numerous ways of warming your patient, from cotton blankets to
water mattresses. Research has shown that low temperatures surrounding the
patient are a major factor contributing to hypothermia.1, 2The warming system
covers the patient with warm air and actively transfers heat across the skin. The
result is to achieve normothermia.
1Morris RH, Wilkey BR. “The Effects of the Ambient Temperature on Patient Temperature
During Surgery Not Involving Body Cavities.” Anesthesiology 32:102-107, 1970.
2Morris RH. “Influence of Ambient Temperature on Patient Temperature During
Intra-abdominal Surgery.” Annals of Surgery 173:230-233, 1971.

Introduction
10 Operator’s Manual
In creating this warm customized pocket of air around the hypothermic patient,
it is important to note that stagnant air, even if it is warm, does not work as an
effective heat transfer medium. Stagnant air acts as an insulator, preventing the
boundary layer of molecules next to the skin surface from transferring heat.
Forced air warming causes warmed air molecules to flow over cooler skin
surface. It is this active flow of warmed molecules that acts as a heat transfer
medium. With the warming system, air is warmed and delivered into a
lightweight blanket (CareQuilt™ or CareDrape™ blanket) that rests over or under
the patient. The CareQuilt™ and CareDrape™blankets have many small
perforations on the underside that allow air to exit the blanket and surround the
patient.
Safety Features
The warming system is designed to give healthcare professionals more control
over the patient’s core body temperature. There are several safety features of
the warming system which make it safe and appropriate for such use.
Customized Warming Therapy
Clinicians select a temperature range setting at the onset of warming therapy to
help ensure the appropriate setting is selected for every patient.
Automatic Temperature Stepdown
The warming system provides a 45-minute temperature stepdown feature.
When in Boost Mode, blower temperature will automatically drop to the high
temperature setting after each 45 minutes of use. The temperature may be reset
to Boost Mode by selecting the boost temperature setting on the control panel
to start another 45-minute cycle.
Automatic Over Temperature Shutdown
The automatic temperature controller and two back-up systems help ensure the
temperature will not reach excessive levels. If necessary, the control system
automatically turns off the heater element when the blower outlet temperature
rises to between 47ºC and 50ºC, illuminates the flashing warning light, and
sounds an audible alarm. The warming system heater will start producing heat

Safety Features
Operator’s Manual 11
when the warming system temperature drops to between approximately 34ºC
and 37ºC. A yellow warning light illuminates whenever the control system
identifies an over-temperature condition.
Alarms
The WarmTouch control circuit manages and monitors operation of the patient
warming system. Should the control circuit encounter a failure condition, it
reports failures using both visual and audible alarms. The visual alarm is a yellow
warning indicator on the control panel that lights at power on, upon power
restoration following power failure, and whenever the control system identifies
an alarm condition. The audible alarm sounds intermittently or continuously,
depending on the alarm condition. Investigate immediately.
The WarmTouch control circuit recognizes two failure conditions.
1. Power On/Power Fail Alarm — This condition causes an intermittent
audible alarm and continuous visual alarm. It appears at power on and after
power failure, indicating the operator must select the desired temperature.
Upon selection of a temperature key, the system cancels the alarm and the
blower operates at the desired temperature.
2. Over-temperature Alarm — This condition causes a continuous audible
alarm and a flashing visual alarm. It appears when reaching the
temperature safety limit, and the control system turns off the heater. Once
the system air temperature returns to a safe operating temperature of
between 34ºC and 37ºC, the heater will turn back on.
If the control system determines the heater again exceeds the safety limit, the
warming system alarms once more. Take the warming system out of service
for repair by a qualified service technician.
If a power failure occurs while the warming system is in the over-temperature
fault condition, and the warming system is still in the over-temperature fault
condition when power is restored, continuous audible and visual alarms will
activate. In this instance, the over-temperature fault cannot be cleared. Take
the warming system out of service for repair by a qualified service technician.
HEPA Filter
Caution
The HEPA filter must be changed every 2,000 hours of operation. Refer to the
Routine Maintenance section in the Service Manual for replacement procedures
requiring a qualified technician.

Introduction
12 Operator’s Manual
The system's High Efficiency Particulate Air Filter is 99.97% efficient at
0.3-micron particle size.
Wheel Locks
The cart is equipped with two wheel locks. The wheel locks prevent the cart
from moving while in use. The wheel locks must be released when moving the
cart. Press the wheel lock arm down to lock the wheel. Lift the wheel lock arm to
release the wheel lock.
Figure 1. Cart Wheel Lock
Symbols
The symbols identified are the symbols used on the warming system and
warming system labeling.
Table1.Symbols on the Warming Unit
Attention symbol, consult accompanying documentation

Symbols
Operator’s Manual 13
Do not direct air from the hose to the patient (free-hosing); use hose only
with warming blankets.
Dangerous voltage
Protection Class I
Protection Type BF
Date of manufacture
Visual and audible alert
Table1.Symbols on the Warming Unit

Introduction
14 Operator’s Manual
Description of the Warming System
The warming system CareQuilt™ and CareDrape™ blankets are intended for
prevention and treatment of hypothermia. For example, use the warming system
with the surgical patient, the patient in the preoperative holding area, the
pregnant woman who shivers during epidural anesthesia due to hypothermia, or
any patient who is uncomfortable in the cold critical care environment.
Table2.Symbols on the Warming Unit Shipping Label
Keep away from sunlight
Keep upright, this side up
Fragile
Keep dry
Relative humidity limitations: 15% to 95%
Temperature limitations: -40°C to +70°C
Serial Number
Reference Code

Description of the Warming System
Operator’s Manual 15
Figure 2. Front View
Figure 3. Control Panel Warning Indicator and Temperature Selection Keys
1 —Hose 4 —Power Cord
2 —Main Power Switch 5 —Hour Meter
3 —Nozzle 6 —Control Panel

Introduction
16 Operator’s Manual
Figure 4. Back View
1 —Over-Temperature Test Port 5 —Filter Cover
2 —Instruction Label 6 —Bed Hook Bracket
3 —Blower Cart Clamp 7 — Nozzle Strap with Clip
4 —Warning Label

Overview
Operator’s Manual 17
1Installation
Overview
This chapter contains information for installing the WarmTouch™ Model WT-5900 patient
warming system.

Installation
18 Operator’s Manual
Cart Installation
The warming system is shipped installed on the warming system cart. Ensure
the three blower cart clamps are tight.
Figure 5. Maximum Mounted Height

IV Pole Installation
Operator’s Manual 19
IV Pole Installation
The warming system should not be installed on the IV pole with the handle
higher than 76 centimeters (30 inches).
Figure 6. Maximum IV Pole Installation Height

Installation
20 Operator’s Manual
Patient Bed Installation
The patient rail connectors will fit on bed rails up to 1.4 inches (3.6 centimeters)
wide.
Figure 7. Bed Rail Installation