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

 

 

 

 

 

 

 

 

Table 14. Gravimetric percentage calculation

 

 

 

 

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

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