Data Acquisition and Analysis
The Defi-X is no longer automatically set to a specific frequency response. There are two diagnostic frequency options: 0.05-150 Hz diagnostic frequency filter and 0.05-40 Hz filtered diagnostic frequency filter
See chapter 7 for switching between these two options.
Waveform Details
The following tables show the waveforms provided by the Defi® Xpress when connected to resistive loads of 25, 50, and 100 ohms and set to its maximum output.
The waveforms are identified by the Defr-X peak current values (Ip) for two-phase operation:
Duration of the first output phase (tphase1) and duration of the second output phase (tphase2).
The indicated values are within 10%.
Waveform: Truncated exponential curve Biphasic
Output Energy Accuracy
±10% or 1J(whichever is greater) at 50 ohms
±15% or 1J(whichever is greater) at 25-100 ohms
Charge Time
< 06 seconds @ 200 J (with a Ni- MH 12 volt ).
< 12 seconds @ 360 J (with a Ni- MH 12 volt after 15 discharges). < 15 seconds @ 360 J (without battery 90% AC mains voltage)
Indication of the state of charge: acoustic and graphic.
Output
Adult paddle, pediatric adapter and multipurpose hands-free adapter available.
Synchronizer: delivers power within 60 msec.
Disarm: Front panel switch.
Heart Rate Sp02 Alarm
Auditory: 5-pulse 800 tone with a PW of 150 msec, a PRI of 225 msec, and a repetition interval of 10 seconds.
Visual: The heart rate alarm flashes the displayed heart rate at 2 Hz.
This indicator is located at the top of the display and is 0.4" high and 0.28 to 0.840" wide, depending on the number of digits in the heart rate. It is amber, black, white, or the color of the display text.
Lead Fault Alarm
Audible: trio tone with 3 pulses, 500 Hz, with a PW of 200 msec and a PRI of 310 msec.
When the HR alarm is triggered or the pacemaker is on, the lead error tone is repeated at a 20-second repetition interval.
Visual: When a lead error occurs, the message "LEAD FAULT" is displayed along with a dashed line across the width of the trace.
The text is 0.18" high and is the color of the display text.
The dashed line is 5" long and corresponds to the width of the display. The signal is not modulated
Physiological Alarms (Sp02) (Options)
Acoustic: See heart rate alarm
Visual: Physiological alarms make the displayed parameter flash at 2 Hz.
The color is amber, white, or the same as the colored text on the display.
Mute Duration: 90 seconds.
Heart Rate Sp02 Alarm
Auditory: 5-pulse 800 tone with a PW of 150 msec, a PRI of 225 msec, and a repetition interval of 10 seconds.
Visual: The heart rate alarm flashes the displayed heart rate at 2 Hz.
This indicator is located at the top of the display and is 0.4" high and 0.28 to 0.840" wide,
depending on the number of digits in the heart rate. It is amber, black, white, or the color of the display text.
Input
3-wire 5-core patient cable
Size: 8 inch
Type: color (TFT)
Screen resolution: 800 x 600 pixels.
Passing speed: 12.5mm/s25mm/s50mm/s
Line selection: I II Ill AVR AVL AVF V.
Frequency response: (user selectable).
0. 7 to 20 Hz Operating mode
0.3 to 40 Hz Monitoring mode
0.05 to 150 Hz Analysis mode
0.5 to 30 Hz AED mode
Common mode rejection: > =60dB
Heart rate monitoring: 20 to 300 8PM.
Heart rate alarms: user selectable.
Size: 0.125 0.25 0.5 1 2 4 cm/mv and auto ranging. ECG output: 1 V/mv.
Heart rate response to irregular rhythm:
(AAMI EC13-1992 Section 4.1.2.1.e.)
Frequency Response
Automatically adjusted to the frequency response of the monitor.
Battery
High capacity type: Ni- MH 12V volt - MEDITECH
Up to 4 hours ECG monitoring or 90 full energy
charges or 3 hours combined ECG Sp02 and monitoring Proper battery maintenance is required to maintain
maximum available capacity.
Low battery indicator:
Flashing low battery icon on display and flashing
LED on front panel.
Recharge speed: 80% in 7.5 hours. 100% in 9 hours.
General
Weight: 4.95 kg (basic equipment).
Size: 13 x 12.5 x 5.3 inches (33 x 31.8 x 13.5 cm).
Operating Power
Ni- MH 12 volt - MEDITECH
SAED Rhythm detection performance
The algorithm DEFI XPRESS SAED exceeds
the requirements of ANSI /AAMI.
Recorder
Type: high resolution thermal array.
Annotation: time date ECG lead ECG gain heart rate defibrillation and treatment summary ACLS events. Paper width: 50 mm.
Paper speed: 25 mm/sec 50 mm/sec 12 leads 50 mm/sec Delay: 6 sec.