Mallinckrodt NPB-190 Instrukcja Operatora Pobierz pdf (Strona 43)

Start-Up and Use

SatSeconds Alarm Management

With traditional alarm management, upper and lower alarm

limits are set for monitoring oxygen saturation. During

monitoring, as soon as an alarm limit is violated by as little as

one percentage point, an audible alarm immediately sounds.

When the %SpO

2 level fluctuates near an alarm limit, the alarm

sounds each time the limit is violated. Such frequent alarms can

be distracting.

The N-395 utilizes Nellcor SatSeconds alarm management

technique. With the SatSeconds technique, upper and lower

alarm limits are set in the same way as traditional alarm

management. The clinician also sets a SatSeconds limit that

allows monitoring of %SpO

2 below the selected low alarm limit

for a period of time before an audible alarm sounds.

The SatSeconds limit controls the time that the %SpO

2 level

may fall below the alarm limit before an audible alarm sounds.

The method of calculation is as follows:

The number of percentage points that the %SpO

2 falls outside

the alarm limit is multiplied by the number of seconds that the

%SpO

2 level remains outside that limit. This can be stated as an

equation:

Points x Seconds = SatSeconds

Where:

Points = SpO

2 percentage points below of the limit

Seconds = number of seconds SpO

2 remains at

that point below of the limit

For example, Figure 11 demonstrates the alarm response time

assuming a SatSeconds limit set at 50, and a lower alarm limit

set at 90 percent.

In this example, the %SpO

2 level drops to 88 (2 points) and

remains there for a period of 2 seconds (2 points x 2 seconds =

4). The %SpO

2 then drops to 86 for 3 seconds and then to 84

for 6 seconds. The resulting SatSeconds are:

1 2 ... 38 39 40 41 42 43 44 45 46 47 48 ... 109 110

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