ZOLL Thermogard XP IVTM System Operation Manual - Manual (Page 16)

Introduction
4
Patient temperature feedback is used to control the system. The patient’s
temperature is measured by an indwelling YSI 400 thermistor temperature
sensor. In response to the patient’s measured temperature, the System employs
both cooling and heating. Cooling occurs when the patient’s temperature is
above the set point target temperature. Heating occurs when the patient’s
temperature is below the set point target temperature. The amount of heating or
cooling power is proportional to the difference in temperature between the set
point target temperature and the patient’s measured temperature.
A basic diagram of the System is illustrated in the following figure.
1. Saline bag.
2. Peristaltic pump
3. Air trap
4. Heat exchange coil
5. Coldwell
6. Coolant pump
7. Chiller & Heater
8. Catheter
9. Patient
10. Pin wheel flow indicator
Figure 2-1. Simplified Flow Diagram.
System Components
Controls and Display
The operator’s display panel contains four buttons and one knob used to access
functions and adjust settings with the aid of the menus and messages displayed
on the screen. The controls and display are illustrated in figure 2-2 and explained
in the following text.
Display
The display is a backlit color LCD panel that can be easily read in all ambient
lighting conditions. It is used to display status, menus, messages, alarms, and
patient temperature trend graphs.
The display head is attached to the mast by an adjustable swivel/tilt mounting
clamp. The user can adjust the tilt and rotation of the display head and lock it into
position by using this clamp.
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