Table 3 Reliability and feasibility
Per sensor | |
|---|---|
Initialization time | 27 min |
Total time until first displayed value | 37.5 min [36/42] |
Expected monitoring time after initialization | 72 h |
Actual monitoring time after initialization | 37.9 h [23/71.3] |
Real-time data display | 32.5 h [16/62.4] |
Percentage of real-time data display/expected monitoring time after initialization | 45.1 % |
Percentage of real-time data display/actual monitoring time after initialization | 84.8 % [67.9/93.8] |
Data gaps after initialization | 5 h [1.9/8.3] |
Percentage of data gaps/actual monitoring time after initialization | 15.2 % [6.2/32.1] |
Number of performed calibrations | 9.5 [6/13] |
Reasons for the 11,568 min (192.8 h) of data gaps | Percentage of data gaps 11,568 min (192.8 h) | Percentage of monitoring time 80,223 min (1337.1 h) |
|---|---|---|
1 Poor sensor signal (%) | 23.3 | 3.4 |
2 Sensor failure (%) | 15.0 | 2.2 |
3 Processor line error (%) | 10.9 | 1.6 |
4 Disconnection (%) | 15.6 | 2.3 |
5 Pending after reconnection (%) | 3.4 | 0.5 |
6 Calibration required (%) | 27.8 | 4.0 |
7 Others (%) | 4.0 | 0.6 |
Device-related reasons (1–3) (%) | 49.2 | 7.2 |
Not device related (4–7) (%) | 50.8 | 7.4 |
Reasons for 21 prematurely sensor removals | Number of sensors | Percentage of all sensors (%) | Percentage of removed sensors (%) |
|---|---|---|---|
Sensors 72 h completed | 10 | 32.3 | – |
Sensors removed prematurely | 21 | 67.7 | 100 |
1 Accidentally | 7 | 22.6 | 33.3 |
2 Poor sensor signal during measurement | 7 | 22.6 | 33.3 |
3 Poor sensor signal immediately after initialization | 1 | 3.2 | 4.8 |
4 MRI | 1 | 3.2 | 4.8 |
5 Discharge | 1 | 3.2 | 4.8 |
6 Death | 2 | 6.5 | 9.5 |
7 Others | 2 | 6.5 | 9.5 |
Device-related reasons (1–3) | 15 | 48.4 | 71.4 |
Not device related (4–7) | 6 | 19.4 | 28.6 |