3
System features
Filter with Gas Vent
Level 1
®
D-Series Disposable Sets employ a unique "hands-off" Gas Vent which vents
micro-bubbles of gas that are always released from fluids as they are warmed. In many
other warming systems, these micro-bubbles are actually delivered to the patient along
with the warmed fluids.
The Filter with Gas Vent assembly in the I.V. Sets contains a 170-micron screen filter to
trap macro-aggregates found in blood products. This filter has luer-lock connections and
Figure 1. Block diagram of Level 1
®
fluid warmers.
Circulating
water bath
flow
Heat
Exchanger
Heater
Pump
Figure 1 diagrams the H-1000 and its operation.
An onboard pump circulates warm water through
the aluminum heat exchanger in the disposable
set. Note that the circulating water bath and the
infusate flow against each other, or counter-
current, which maximizes heat transfer. This
diagram describes the essence of all Level 1
®
fluid
warmers.