User Manual

INTRODUCTION
PatientNet Operator’s Manual, v1.04, 10001001-00X, Draft 17
All information contained herein is subject to the rights and restrictions on the title page.
Clinical Calculations
Heart Rate Accuracy
Ambulatory Patients
The heart rate accuracy of the Central Station for ambulatory patients meets the per-
formance required for adult patients as specified in the Standard for Cardiac Monitors,
Heart Rate Meters and Alarms ANSI/AAMI EC-13 1992 (3.2.7).
The heart rate is based on a tracked six-beat average. The following intervals are used
for heart rate calculations:
the interval preceding every detected beat during the learn
the interval between two recognized morphologies after the learn
After each qualified beat, an instantaneous heart rate is derived from the preceding
interval. The new heart rate is calculated as shown below.
New heart rate = (current rate - current rate/6) + (instantaneous rate/6)
Bedside Monitored Patients
The heart rate accuracy for bedside monitored patients is determined by the
specifications of the bedside monitor.
NPB 7200 Series Ventilator Patients
There is no heart rate data for ventilator patients, but a pulse rate based on SpO
2
may
be sent to the Central Station from the ventilator.
PVC Count
The PVC count is the number of PVCs (arrhythmia V-Calls) in the last 60 seconds.
If no PVCs occur for 12 seconds, the PVC count becomes zero even if there are PVCs
within the last 60 seconds. However, if a PVC occurs in a subsequent 12 second
period, then the total PVC count for the last 60 seconds is displayed.
If the PVC is part of a recognized ventricular arrhythmia (bigeminy, trigeminy, cou-
plet, etc.), the called PVC count can lag behind the actual PVCs by up to 10 seconds.
When arrhythmia processing is off, the PVC count is removed.