Nellcor WT-5300A User manual
Model WT-5300A Patient Warming System
Operator’s Manual
© 2010 Nellcor Puritan Bennett LLC. All rights reserved.
To obtain warranty information contact your local Nellcor representative.
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
Operator’s Manual iii
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
iv Operator’s Manual
1 Safety Information
Overview
This manual contains information for using the WarmTouch™ Model WT-5300A 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
Overview
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.
Operator’s Manual 5
Safety Information
Warnings
WARNING
Possible explosion hazard. Do not use this 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
patient’s 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.
6 Operator’s Manual
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.
Safety Information
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.
Operator’s Manual 7
Safety Information
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 that the patient is dry or the warming system may be ineffective.
8 Operator’s Manual
1 Introduction
Overview
This chapter provides an introduction to the WarmTouch™ Model WT-5300A
patient warming system.
Intended Use
The WarmTouch™ Model WT-5300A 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.
Overview
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.
covers the patient with warm air and actively transfers heat across the skin. The
result is to achieve normothermia.
1
Morris RH, Wilkey BR. “The Effects of the Ambient Temperature on Patient Temperature
During Surgery Not Involving Body Cavities.” Anesthesiology 32:102
2
Morris RH. “Influence of Ambient Temperature on Patient Temperature During
Intra
-abdominal Surgery.” Annals of Surgery 173:230-233, 1971.
1, 2
The warming system
-107, 1970.
Operator’s Manual 9
Introduction
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 warning light, and sounds an
audible alarm. The warming system heater will start producing heat when the
10 Operator’s Manual
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. In either case, investigate
immediately.
The WarmTouch control circuit recognizes two failure conditions.
Safety Features
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
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.
and visual alarms will
Operator’s Manual 11
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