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Chapter 5: Alarm processing
5.4
Monitoring function suppression
Alarm override /
confirmation
5.5
Alarm system
Pressure monitoring
Air infusion
5-4
The following alarm conditions are assigned high priority in the "New"
alarm scheme:
– Lower return pressure:
Potentially, the system may become disconnected, resulting in
ongoing blood loss via the access.
– Failure to detect the pump clips on the Ci-Ca pumps (no occlusion):
Potentially, the patient may suffer air infusion or blood loss via the
Ci-Ca tubing system.
In addition, the following conditions have an elevated risk and require
intensive observation and monitoring:
– Override condition following blood leak.
Warning
When the monitoring function is suppressed, the operator is responsible
for the patient's safety.
Suppresses the pressure alarms (alarm limits widened to the end of the
scale) for the time the blood pump starts running plus 10 seconds.
Overrides a blood leak alarm for around 2 minutes (for MPS, the blood
leak detector can also be deactivated in the Treatment menu).
It is not possible to override the air alarm.
To avoid unnecessary false alarms, the monitoring window can be
temporarily extended, disabled, or its levels adjusted to the current
pressure following changes to relevant parameters, pressure alarms, or
issuing pump stop / start commands. These conditions are time-limited.
Monitoring at the display range thresholds remains unaffected.
To ensure that the stringent limit values for detecting air infusion are
always maintained, you may need to restrict the maximum blood flow
for low-weight patients (see chapter 12.11 on page 12-14).
Note
Air infusion alarm limits are dependent on blood flow and patient weight.
Full sensitivity at max. blood flow is achieved with patient weights
upwards of 45 kg.
If return pressure is negative (e.g., when deploying central venous
catheters) then the risk of an air infusion is present, even downstream
of the air detector.
Fresenius Medical Care multiFiltrate IFU-EN-UK 15A-2015
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