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Table 3 Frequency of Aberrant Vital Signs Recorded by High Risk Bedside Monitors

From: Use of a novel electronic maternal surveillance system to generate automated alerts on the labor and delivery unit

Number of Recorded Valuesa Maternal Early Warning Criteria Authors’ “Flashing Red” Criteria Authors’ Automated Paging Criteria
Criteria Eventsb Percent of Recorded Values Events/24 Hours Criteria Events Percent of Recorded Values Events/24 Hours Physician Paging Criteria Pages to OB Pages to OB/ 24 Hours
47,016 Systolic
BP < 90
1170 2.49% 12.86 Systolic BP < 85 581 1.24% 6.38 Systolic
BP < 85
87 0.956
47,016 Systolic
BP > 160
910 1.94% 10.00 Systolic
BP > = 160
1021 1.03% 11.22 Systolic
BP > = 160
260 2.85
97,558 Diastolic
BP > 100
1317 2.80% 14.47 Diastolic
BP > = 110
483 1.24% 5.31 Diastolic
BP > = 110
37 0.407
143,799 SpO2
<  95%
4996 5.12% 54.90        
143,799 Heart Rate < 50 602 0.42% 6.62        
47,016 Heart Rate > 120 4676 3.25% 51.38 Heart Rate > = 130 2168 4.61% 23.82 Heart Rate > = 130 190 2.09
  Total Events Per 24 Hours 150.2 Total Events Per 24 Hours 46.7 Total Pages Per 24 Hours 6.30
  1. aThe data in this table are based on the vital signs recorded by the bedside monitors in 34 high risk patient rooms over a 91 day period from April 1, 2017 to July 1, 2017
  2. bThese vital signs frequencies in this table are taken directly from the bedside monitor without nurse verification, and therefore likely contain some artefactual readings
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