S E C T I O N 5
•
P r i n c i p l e o f O p e r a t i o n
12
HOTLINE
®
3 Blood and Fluid Warmer | Operator’s Manual
SECTION 5
Principle of Operation
HOTLINE
3 Warmer delivers blood and intravenous fluid at
normothermic temperatures under routine, gravity flow rates.
Conventional fluid warming systems suffer from cool-down between the
warmer and the patient connection. HOTLINE
3 Warmer overcomes this
problem by providing active warming of the patient line all the way to the
patient connection.
Active warming is achieved by surrounding the sterile intravenous line
with a layer of precisely controlled warm recirculating solution (
a
)
, thereby
protecting the patient line against exposure to cold and eliminating patient
line cool-down.
Infusate Delivery Temperatures
The following table shows the typical infusate delivery temperatures
at the patient end of an
L-370
HOTLINE
3
Fluid Warming Set
.
Note: The setpoint temperature of the recirculating solution is
38.0
C.
a
a
0
500 1000 1500 2000 2500 3000 3500 4000 4500 5000
Flow Rate (ml / hr)
20° C Saline
10° C Saline
T
emperature ° C
40.0
36.0
32.0
28.0
24.0
20.0
22.0
42.0
38.0
34.0
30.0
26.0
Ambient Temperature Range: 20° C ± 2° C
Source data on file
