ZOLL M Series Defibrillator Rev E BiPhasic - Manual (Page 3)

RECTILINEAR BIPHASIC WAVEFORM
9650-0209-01 Biphasic - 3
Energy Delivery Test
The energy delivery test for the Biphasic Option is performed
at 30 J according to the instructions contained in Section 9 of
the M Series Operators Guide.
When performing the energy delivery test at 30J the recorder
strip should resemble that shown below.
12:46:30 02-SEP-99 PAD SIZE 1.0 HR = 30 30 JOULES TEST OK TEST_CUR = 11A DEFIB_IMPED = 1
Rectilinear Biphasic Waveform
Defibrillator Option Information
The Biphasic Option has been designed to produce a
Rectilinear Biphasic Waveform whose shape remains
essentially constant from patient to patient by the device.
The Rectilinear Biphasic Waveform consists of a 6
millisecond, essentially constant current first phase followed
by a 4 millisecond, truncated exponential second phase. The
first and second phases of the defibrillation waveform are of
opposite polarity and their amplitudes vary based on the user
selected therapeutic energy level. The initial amplitude of this
waveform's second phase is approximately equal to the first
phase's final amplitude. This waveform has an integrated
patient impedance measurement sensing pulse at the
beginning of the waveform. The positive and negative
phases are separated by 100 µsec. The shape of the
waveform’s first phase is controlled by electronics and
software which compensate for different transthoracic
impedances to maintain an essentially constant current
throughout the first phase.
When the highest energy setting is selected and patient
impedance exceeds 85 ohms, the first phase of the
waveform will droop. All other waveform parameters (phase
duration, inter-phase delay and integrated impedance
measurement sensing pulse) remain the same. The following
Rectilinear Biphasic Waveform is produced when the M
Series with Biphasic option is discharged into a 50
Ω load at
the default energy setting of 120 Joules. The vertical axis is
in amperes; the horizontal axis is in milliseconds. (For more
detailed information regarding the parameters of the
Rectilinear Biphasic Waveform when discharged into 25
Ω,
50
Ω, and 100Ω loads at a maximum energy setting of 200
Joules refer to the Specification section of this Operator’s
Insert.
BIPHASIC DEFIBRILLATION PULSE
120 JOULES INTO 50 OHM LOAD
Duration (msec)
Current
(I Patient)