ZOLL Thermogard XP IVTM Physician Manual - Manual (Page 33)

ZOLL IVTM™ System Physicians' Manual
600248-001 Rev 3 32
4. Similarly, check the tubing that returns to the pump from the patient. Examine
the saline bag to ensure that it has not been accidentally compromised (for
example, the spike may have damaged the bag wall).
5. Lastly, trace the tubing from the saline bag back to the pump.
Cool Line Catheter – Two Functions
The Cool Line is both a heat exchange catheter and a central venous line. The loss
of heat exchange function, for any reason, does not necessarily invalidate the use of
the catheter as a central line.
Should the catheter’s balloons fail or the heat exchange functionality not be required,
the Cool Line should still function as a viable central line. Simply cap the inflow and
outflow lumens together to ensure the sterility of the catheter and use the infusion
lumens as you would any central line.
Seven Day Dwell Time – Cool Line Catheter Only
The Cool Line catheters, and the associated Start-Up Kit, are cyclically pressure-
tested to ensure that they can withstand the forces of the pump over extended
periods of time. ZOLL labels its catheters for no more than seven days use. It is
recommended that an over-the-wire exchange be conducted after this time if heat
exchange support is still required.
If heat exchange functionality is no longer required, the catheter may remain in situ if
its central line functions are still required. In such cases ZOLL recommends that you
disconnect the IVTM System and, using aseptic technique, cap the inflow and outflow
lumens of the catheter together. The catheter may then be used as you would any
central line.
“Dead Head” Pressure
The IVTM System relies upon fluid being pumped to and from the patient. This is
done under pulsatile pressure. Each time the rotor pump sweeps the tubing there is a
peak in the pressure in the tube and more fluid flows through the system. Usually the
inflow lumen has an operating pressure that is almost the same as that in the tubing
at the pump and the pressure then drops along the length of the IVTM catheter so
that the return pressure is low.
Should the return tubing be occluded, the entire length of the catheter will see
pressures that are effectively the same as those at the pump. Our engineers call this
the “dead head” pressure. This pressure is not sufficient to rupture the balloon or the
catheter. However, cyclically stressing the catheter with this pressure for prolonged
periods of time is not recommended.
Water and Propylene Glycol
The fluid in the bath is a propylene glycol and water mixture. Should the bath level
drop, this will usually be simply due to water evaporation from the bath (at room
temperature glycol will not noticeably evaporate). In such cases, add distilled water to
the bath to return it to its original fill level (the heat exchange coils must be covered).
The safe handling of the glycol is a simple matter. Spills can be safely wiped up with
paper towel and disposed of in the ordinary trash. As with any chemical spill, wearing
gloves is preferable. It is not flammable under normal conditions and not volatile.
ZOLL can supply Material Safety Data Sheets on the material used (for details,
contact our Customer Service department).