ZOLL Thermogard XP IVTM Physician Manual - Manual (Page 12)

ZOLL IVTM™ System Physicians' Manual
600248-001 Rev 3 11
/hr). When the patient reaches the target temperature, the IVTM System will revert to
the MAX treatment option i.e. it will attempt to make the patient’s temperature the
same as the selected target temperature.
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NOTE: Controlled Rate
Controlled rate operates in both warming and cooling modes.
FEVER (FVR)
In this treatment option, the IVTM System will starting cooling the patient once the
patient temperature is above the target temperature. It does this by keeping the bath
at its coldest permissible temperature and then operating the saline pump whenever
the patient’s temperature moves above the target temperature. Maximum cooling
power is always applied as with Max Power.
WARNING! “Lo” patient temperature alarm limit with “FEVER”
The IVTM System will NOT heat the patient when the “FEVER” treatment option
has been selected. The “Lo” patient temperature alarm limit ensures that an
alarm occurs should the patient stop regulating his/her own body temperature.
Such patients will cool to room temperature. This can occur when the patient
dies or becomes comatose.
INVESTIGATE ALL PATIENT TEMPERATURE ALARMS.
Warming (Warm)
In this treatment option, the IVTM System will start warming the patient once the
patient temperature is below the target temperature. It does this by keeping the bath
at its warmest permissible temperature and then operating the saline pump whenever
the patient’s temperature moves below the target temperature. Maximum warming
power is always applied as with Max Power.
WARNING! “Hi” patient temperature alarm limit with
“Warming”
The IVTM System will NOT cool the patient when the “Warming” treatment option
has been selected. The “Hi” patient temperature alarm limit ensures that an
alarm occurs should the patient become febrile.
INVESTIGATE ALL PATIENT TEMPERATURE ALARMS.
The Patient Environment
The patient is in equilibrium with his/her environment. The average human generates
between 75 and 100 watts of energy. Much of this is spent in simply keeping the
body hotter than the environment–heat is lost through convection/conduction to the
air and materials that touch the body (sweat facilitates this loss), heat is lost through
respiration, and heat is lost via infrared radiation.
The rate of heat loss, under normal conditions, is primarily affected by the ratio of the
surface area of the patient’s body to his/her weight. Think of the body as a stack of
cubes: some on the surface that can lose heat to the environment and others inside
that have no direct contact. Only the outside surfaces of the cubes that are the