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11.If the accuracy error percentage is greater
than ± 6%, repeat the test with a new
reservoir. If the pump fails a second time,
call Deltec’s Customer Service Department.
EXAMPLE:
Predelivery Weight: 61.1 g
Postdelivery Weight: - 41.6 g
Weight of Amount Delivered: 19.5 g
= 19.5 ml
Volume of Amount Delivered: 19.5 ml
Intended Delivery Volume: - 20.0 ml
Inaccuracy Volume: – 0.5 ml
Inaccuracy Volume: – 0.5 ml
Intended Delivery Volume: ÷ 20.0 ml
Accuracy Error: -0.025 ml
Accuracy Error: -0.025
x 100.00
Accuracy Error Percentage: –2.5%
Volumetric Accuracy Testing (Option 2)
Description:
A predetermined amount of water is delivered
into a collection device such as a burette or
graduated cylinder. The amount of water
delivered is compared to the amount that the
pump should have delivered.
Nominal system accuracy is given in the
technical specifications section for the pump.
That is, under the test conditions described
below, the accuracy of the pump and reservoir
will be nominal with a 90% confidence level.
The nominal test conditions are as follows:
degassed water at 25 ± 5°C without back
pressure.
Equipment needed:
• 50- or 100-ml Medication Cassette reservoir
• 50- or 60-ml syringe
• CADD
®
extension set with anti-siphon valve
• A fluid collection device such as a burette or
a class A 25 ml capacity graduated cylinder
• 40 ml of room temperature water
Procedure:
1. Fill the 50- or 60-ml syringe with 40 ml of
water. Transfer the water into a
Medication Cassette reservoir.
2. Remove any air from the Medication
Cassette reservoir by aspirating the air with
the syringe. Attach the CADD
®
extension
set with anti-siphon valve. Prime the tubing
so it is filled with fluid to the end of the
extension set luer lock connector.
3. Attach the end of the extension set to the
fluid collection device.
4. Attach the Medication Cassette reservoir to
the pump. Program the reservoir volume to
20 ml. This is the intended delivery volume.
Open all clamps.
5. Program a continuous rate of 0.0 ml/hr and
a Demand Dose of 1.0 ml (but do not
deliver a Demand Dose). Start the pump
and deliver a clinician bolus of
20 ml.
6. When delivery is complete, record the
volume of fluid delivered. This is the actual
delivery.
7. Find the difference between the volume of
the amount delivered and the intended
Table 14. Gravimetric percentage calculation
Pre- Post Weight of Intended Inaccuracy Accuracy Accuracy
Delivery Delivery Amount Delivery Volume Error Error Percentage
Weight Weight Delivered Volume
61.1 g 41.6 g 19.5 g = 19.5 ml 20 ml -0.5 ml -0.5 ml ÷ 20.0 ml = -0.025 x 100 = -2.5%
-0.025