Trumpet And Start-Up Curves - CareFusion Alaris SE User Manual

General Information
In this instrument, as with all infusion systems, the
action of the pumping mechanism and variations
in individual administration sets cause short-term
fluctuations in rate accuracy. The following
graphs show typical performance of the system
for both Pressure and Resistance modes in two
ways:
• Accuracy during various time periods over
which fluid delivery is measured (trumpet
curves).
• Delay in onset of fluid flow when infusion
commences (start-up curves).
Product operation is not affected by the selection
of Resistance or High Resistance at
mL/h, and mL/h; therefore, High Resistance
1.0 25
graphs are not included.
Trumpet curves are named for their characteristic
shape. They display discrete accuracy data
averaged over particular time periods or
observation windows, not continuous data versus
operating time. Over long observation windows,
short-term fluctuations have little effect on
accuracy, as represented by the flat part of the
curve. As the observation window is reduced,
short-term fluctuations have greater effect, as
represented by the mouth of the trumpet.
Knowledge of system accuracy over various
observation windows might be of interest when
certain drugs are being administered. Because
the clinical impact of short-term fluctuations on
rate accuracy depends on the half-life of the drug
being infused and on the degree of intravascular
integration, the clinical effect cannot be
determined from the trumpet curves alone.
Knowledge of the start-up characteristics should
also be considered.
100

Trumpet and Start-Up Curves

mL/h,
0.1
The start-up curves represent continuous flow
rate versus operating time for two hours from the
start of the infusion. They exhibit the delay in
onset of delivery due to mechanical compliance
and provide a visual representation of uniformity.
Trumpet curves are derived from the second hour
of this data.
Tests were conducted in accordance with
, "Particular requirements for
IEC 60601–2–24
safety of infusion pumps and controllers" and
"Medical electrical equipment -
AAMI ID26–1998
Part 2: Particular requirements for the safety of
infusion pumps and controllers," using a
Model 72003 Administration Set (includes Flow
Regulator).
User Manual—Alaris SE Pump, Rev2.X
Trumpet and Start-Up Curves
Models 7100/7130, 7200/7230