DPS System Technical Training Guide

Choice of the proper pressure limit Alarm of occlusion : infusion stops

Pressure Pressure limit / occlusion threshold

Time to detect an occlusion Time occlusion

Choice of the proper pressure limit Alarm of occlusion : infusion stops

Pressure Lowering the occlusion pressure fastens the time to alarm

Pressure limit / occlusion threshold

Time to detect an occlusion Time occlusion

Choice of the proper pressure limit Occlusion alarm: infusion stops

Pressure Lowering the occlusion pressure too low will create false alarms

Pressure limit / occlusion threshold

Time to detect an occlusion Time False alarm !

occlusion

Dynamic Pressure System A unique safety feature The DPS system initiates a warning whenever there is a constant pressure increase Independent from the occlusion pressure of the pump

Pressure

Occlusion alarm: infusion stops Occlusion pre-alarm: infusion cont.

DPS warning : infusion continues



Time occlusion

Dynamic Pressure System A unique safety feature The DPS system initiates a warning whenever there is a constant pressure increase Independent from the occlusion pressure of the pump Reaction also on sudden pressure drop

Pressure

DPS warning : infusion continues

Time Disconnection or similar

DPS Function – Volumat Agilia

DPS in Volumat: Pressure increase in 1 - 5 peristatic cycles  Volume in tube segment in front of peristaltic fingers – 3.5 cm of tube (3.41 mm I.D:) = 0.2415 ml  1 peristaltic cycle – 50ml/h = 207 cycles / hour =

3.5 cycles / min = 1 cycle per 17 sec.

– 10ml/h = 41 cycles / hour

0.67 cycles / min = 1 cycle per 80 sec.

– 0,1 ml/h = 0.4 cycles / hour

= =

1 cycle per 150 min = 1 cycle per 9000 sec.

DPS Function – Volumat Agilia

Time needed for 1 peristaltic cycle = minimum time to trigger DPS warning

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DPS Settings Volumat Agilia Partner Agilia

Pump

DPS settings

 DPS Drop: --- ; 100 to 400 mmHg in steps of 50mmHg  DPS Incr.: 50 to 600 mmHg in steps of 50mmHg

 DPS Storage (Pump) / DPS Mémorisation (Partner): Last DPS status is used next time  DPS activation: Only in Partner, switch DPS on or off © Copyright Fresenius Kabi AG

DPS Function – Volumat Agilia

 How to set the threshold value – In general as low as possible – 50mmHg will have a small chance of false warnings when patient is very active – Too high values may lead to a situation similar to DPS off. – Pressure increase must be achievable within 1 cycle (0.24ml)

 Time for DPS warning is rate dependent

DPS – Volumat Agilia

Factors Influencing the Reaction Time  A certain volume has to be delivered to trigger the DPS warning – Volume depends on Tube softness, lengths of set / location of occlusion, priming of the set (tiny air bubbles) – Time to deliver the volume depends on flow rate

Fast Time to Alarm  Set DPS function ON  Prime the line carefully and remove all tiny air bubbles  Use stiff tubing material for extension lines – PE > high quality PVC > low quality PVC

 Try to avoid flow rates below 3 ml/h

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DPS Function

Injectomat Agilia

 With a 50 ml syringe 800 motor steps are equal to 1ml volume – 1200 motor steps = 1,5 ml – 100 motor steps = 0,125ml

 15 mm of movement – Motor steps per mm movement are always the same – Volume depends heavily on size (& brand) – 10ml syringe approx 3.0ml – 20ml syringe approx. 4,4 ml

– 50ml syringe approx 10 ml

DPS Function

Injectomat Agilia  Use a syringe size adapted to the flow rate – Smaller syringes create a faster DPS reaction with low flow rates

 Pressure stabilization for 2 mm of movement. During the stabilization phase, the DPS function is not active. – 10ml syringe approx 0.4ml / 50ml syringe approx 1.6 ml

 The device will then measure an average pressure over a cycle of 1200 motor steps and also simultaneously pressure over a cycle of last 100 motor steps. – 1200 motor steps = 1.5 ml / 100 motor steps = 0.125ml [50ml syringe] 1200 steps

100

 The device will then compares the 100 step average pressure value with the

1200 step average pressure. If the 100 step value overpasses the authorized increase threshold, the device will issue the DPS warning.

DPS Function

Injectomat Agilia  Use a syringe size adapted to the flow rate – Smaller syringes create a faster DPS reaction with low flow rates 1200 steps

100

 Minimum DPS warning times for different syringe sizes

Minimum DPS warning times for different syringe sizes

© Copyright Fresenius Kabi AG

DPS Settings Injectomat Agilia Partner Agilia

Pump

DPS settings

 DPS Drop: 0 ; 100 to 500 mmHg in steps of 50mmHg  DPS Incr.: 100 to 200 mmHg in steps of 50mmHg

 DPS Storage: Last DPS status is used next time  DPS state/ status: Switch DPS on or off

© Copyright Fresenius Kabi AG

DPS Function – Injectomat Agilia

 How to set the threshold value – In general as low as possible – Pressure increase must be achievable within 100 motor steps (0.125ml) for50,l syringe

 Time for DPS warning is rate dependent  1200 motor steps = 1.5 ml (with 50 ml syringe) must be delivered to start the DPS function 1200 steps

100

30ml syr. = 0,75ml 20 ml syr. = 0,60 ml 10ml syr. = 0,45ml

Fast Time to Alarm – Injectomat Agilia  Set DPS function ON  Prime the line with the pump – to remove mechanical clearance

 Use the proper syringe size – Smaller syringe more motor steps = higher short time accuracy – Motor steps are the measurement for the DPS trigger

 Use stiff tubing material – PE > high quality PVC > low quality PVC

 Try to avoid flow rates below 1 ml/h

© Copyright Fresenius Kabi AG

Competitiors Time to Alarm © Copyright Fresenius Kabi AG