User's Manual Part 10

166 Specifications Welch Allyn Propaq LT Vital Signs Monitor
Resp
Table 14. Specification: Impedance Pneumography (Resp)
Characteristic Specification
Connector (shared with ECG) Hypertronics 9
-pin, female D01 latching connector
Input protection Electrosurgery and defibrillator protected and Resp fully functional when used with
any of the ECG cables specified in Welch Allyn Products and Accessories
(810-0409-XX)
Electrosurgery interference
suppression
Yes, but not quantifiable.
Selectable Leads Ld-1 (RA-LA), or Ld-2 (RA-LL) from either 3-lead cable or 5-lead cable, when using
an ECG cable specified for this monitor in Products and Accessories (810-0409-XX).
Base impedance range (in addition
to 1K resistors in ECG cable)
Approximately 200 ohms to 1200 ohms is normal monitoring range.
Approximately 1200 –1500 ohms range produces equipment alert “Resp Fault.
Noisy signal. Check electrodes”.
Above approximately 1500 ohms produces equipment alert “Resp Fault. Lead Fail”.
Thresholds depend on ECG cable type and length.
Impedance dynamic range 20 ohms
Baseline recovery (trace restore) Automatic
Resp size (sensitivity) selections 0.5X, 1X, 2X, 4X, 8X, 16X
Signal bandwidth after detection
(Monitor display and at Acuity)
0.05 to 4.0 Hz at 3dB point
Sample rate 22.73 Hz
Cardiovascular artifact (CVA)
rejection
Presence of CVA is detected automatically. Breaths are picked in the presence of
CVA unless the breath rate is within 5% of the heart rate or a submultiple of the
heart rate.
Resp channel noise ≤ 50 milliohms peak-to-peak typical
Breath detection threshold 0.14 ohms or 2x CVA, whichever is greater, set automatically
Resp rate (RR) range 2 to 150 breaths/min (adult/pediatric mode)
3 to 150 breaths/min (neonate mode)
RR alarm limits 2 to 148 breaths/min (lower, adult/pediatric)
4 to 150 breaths/min (upper, adult/pediatric)
3 to 148 breaths/min (lower, neonate)
5 to 150 breaths/min (upper, neonate)
Resp rate resolution 1 breath/min
Resp rate alarm resolution 1 breath/min
Breath rate accuracy ± 2 breaths/min or 2%, whichever is greater
Motion artifact rejection Not rejected
Obstructive apnea Not detected
RR display update interval at
monitor
1 second
Excitation signal characteristics 65.16 kHz, pseudosine wave, 65 µA RMS ± 5%
Display sweep speed 6.25 mm/sec