Weinmann MEDUCORE Standard2 Instructions For Use Manual page 188

15 Technical data
15.14.2 Accuracy of the delivered energies
188 EN MEDUCORE Standard
The mean ratio of delivered electric charge between the second
(negative) and the first (positive) phase is 0.38.
For safety reasons, voltages of no higher than 2000 V are used.
The resulting currents as a function of patient impedance are
shown in the following graph by way of example.
15-2 Currents as a function of patient impedance
The shock impulse is created current-controlled (I = const.) and
with a fixed duration (t = const.). Patient impedance is the only
variable. The shock impulse energy is the result of the current,
impulse duration and patient impedance. Since the current and
impulse duration are specified, the shock impulse can be
individually adapted for each patient.
The current control of the shock impulse ensures that patients with
lower impedance receive the same current as patients with higher
impedance since it is not the energy but the current which is
decisive for defibrillation. Furthermore, current control prevents
patients with a lower impedance from being shocked with an
overly high current.
Due to current control and the dependence of the energy
administered on patient impedance, it is possible that the energy
which is delivered deviates from the selected energy (see table
below).
2