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Many factors which are insignificant in low fluid administration are restrictors
of higher flow infusion. If you encounter flow restriction with any Level 1
®
Fluid
Warmer, CHECK EACH OF THESE POSSIBLE CAUSES.
OLD BLOOD
Stored blood begins to develop particulate within 5 to 7 days. This may
partially block fluid pathways, impeding flow.
FULLY SPIKED BAG
Bag port membranes may only be split, not completely pierced.
BAG PORT FILTER (if used)
40 micron to 80 micron filters used between the blood bag and the bag spike
of the Disposable set may restrict flow because:
1. Cold, viscous blood does not flow well through small pore filters.
2. As they are directly connected to the source of particulate with no pre-
filtering, they clog quickly.
3. They may trap air which can block filter media surface area.
CLAMPS PARTLY ENGAGED
Check to be sure all clamps are fully open.
TUBE SET
Leaving clamps engaged for extended periods of time when the Disposable
Set is not in use (such as pre-set-up) will cause the tubing to take a SET in
the clamped position.
TUBE KINK
Be sure no tube kinks are present anywhere in the set, especially in the Y-set
when a pressure cuff is employed and the IV Pole is used in a lowered
position.
TRAPPED AIR IN FILTER
As noted in the Priming instructions, remove the Filter from the holder and tap
against the Cabinet to dislodge air bubbles and allow them to vent out.
CLOGGED FILTER
If good quality blood is used, this filter should never cause flow restriction. In
the event of a clogged filter, this component may be changed. If frequent
clogging is encountered, discuss the QUALITY of the blood being used with
your Blood Bank
EXTENSION LINES
Use only extension lines with a bore of .130" (3.3 mm) or larger, equipped
with large bore fittings, such as Level 1
®
Part No’s. X-36 or Y-30.
STOPCOCK OR Y ADAPTER
Any fittings attached to the male luer-lock at the end of the Patient Line
should have large bores. If their bores are smaller than the male luer-lock
bore, they are restrictors.
NEEDLE or CATHETER
If possible, use a minimum 18 Gauge needle or 16 French catheter. Smaller
sizes will reduce flow.
Trouble Shooting Slow Flow Rates
