 |
Figure
4 5 mL Infu-DiskTM Flow Rate Profile for a 5
Day Delivery Rate (0.042 mL/hr)
|
The
Infu-DiskTM
pump's flow rate rises linearly to it's set flow rate before the
delivery of the first 0.25 mL. After 97% of the pump's
fluid has been delivered the flow rate will diminish as shown in
figures 1 through 4.
|
| Flow
Rate Accuracy |
When
exposed to standard operating conditions the Infu-DiskTM
pump's flow rate, calculated on a incremental basis, will not
vary by more than ±10% after delivery of the first 0.5 mL and
before delivery of the last 0.5 mL of it's contents. The
time interval used to calculate flow rate is the time required
to deliver 0.5 mL. See figures 1 through 4 for flow
profile start-up and ending characteristics.
|
| Influence
of Pressure on Flow Rate |
The
factory set flow rate for an Infu-DiskTM
pump is based on a standard fluid delivery pressure of 11 mm Hg.
Fluid delivery pressure is defined as the pressure measured on
the fluid side of the pump. Variation from this pressure
will cause flow rate to vary from its factory set rate.
Figure 5 shows the percent variation of flow rate at pressures
other than the standard fluid delivery pressure.
|
 |
Figure
5 Influence of Fluid Delivery Pressure on Infu-DiskTM
Factory Set Flow Rate
|
| Note
that a positive offset represents an increase in the set flow
rate and a negative offset represents a decrease. The
corrected flow rates for pumps with factory set flow rates
greater than 0.1 mL/hr that are subjected to delivery pressures
other than 11 mm Hg can be estimated using this equation: |
| Expected
Flow Rate = Factory Set Flow Rate x |
14.9
psia |
|
| 14.7
psia + Fluid Delivery Pressure (psig) |
