Patient Preparation For Cardiac Output; Monitoring - Dräger Infinity Acute Care System M540 Instructions For Use Manual

Patient preparation for cardiac output monitoring
The following tips provide optimal cardiac output
monitoring results but must never replace hospital-
approved practices or manufacturer's recommen-
dations.
– Follow the recommendations of the manufac-
turer. Dräger recommends that you place pre-
filled syringes or the closed injectate delivery
system into an ice bath.
– Check the ice bath regularly and add ice to
maintain a temperature between 0 °C (32 °F)
and 5 °C (41 °F). The accuracy of measure-
ments done with the thermodilution method in-
creases as the temperature of the injectate ap-
proaches 0 °C (32 °F).
NOTE
For the most accurate results when using an in-
jectate at room temperature, use a 10 cc injectate
volume unless clinically contraindicated, to get
the best results.
– Verify the injectate volume.
– Verify the proper selection of catheter type and
size or computation constant if Other is chosen
for the catheter type.
Instructions for use Infinity Acute Care System – Infinity M540 SW VG4.n
– Use an in-line injectate system. Systems that
measure the injectate temperature in the ice
bath can introduce errors. These errors happen
because the injectate temperature changes be-
tween its removal from the ice bath and the in-
jection.
– If you fill your syringes manually, fill them with
the same volume each time. The recommended
amount is 10 cc for adults and 5 cc for pediatric
patients. Do not touch the body of the syringe to
avoid warming the injectate.
– Inject the entire volume in one swift, continuous
motion.
– Perform the injection at the end of expiration.
Taking successive cardiac output measure-
ments at different points in the respiratory cycle
provides different measurements, especially for
patients on mechanical ventilators.
– Discard results that are widely different from the
general trend, and results associated with irreg-
ularly shaped waveforms.
Cardiac output
223