Intended use
METRAX GmbH
DefiMonitor XD 21324 / GB / K05
11 / 116
2
Intended use
This device is intended for use by appropriately trained medical personnel and doctors, both in
emergency medical services and in everyday clinical applications, in compliance with
applicable national legislation.
The device is frequently used in brief applications in the course of emergency medical
treatment (typically up to 2 hours).
It can be powered either by a rechargeable internal power source (battery) or from the mains.
The device is used for transthoracic defibrillation. The main application is defibrillation in
asynchronous manual mode, while a further possible application is the cardioversion of atrial
fibrillation in synchronous manual mode after sedation of the patient. In manual mode, the user
decides whether it is necessary to administer a shock, while in AED mode, the device
automatically recommends defibrillation.
In automatic mode, the energy levels for the first, second and third shocks are predetermined
by the set current values 20A, 25A and 30A and the capacitor voltage which depends on the
patient impedance, while in manual mode, the energy levels 5J, 10J 20J, 30 J, 50J, 100J,
200J, 300J, 360 J can be selected in order to allow the doctor to define the defibrillation
charge according to the weight of the patient. This means that in manual mode, defibrillation
can also be carried out on children if suitable pads are used.
The device can also be used to record and display electrocardiograms. When the electrodes
are used as intended, the derivation from the defibrillation electrodes is in the Einthoven II
derivation. If an ECG cable and standard ECG electrodes are used instead of the defibrillation
pads, dual channel monitoring is possible. A random (appropriate) selection of 2 signals from
the Einthoven I, II, III or Goldberger aVR, aVL, aVF
–
analogue derivations can be displayed.
This requires correct positioning of the electrodes as described in the operating instructions.
A further configuration of the device is to equip it with an SPO
2
module and an SPO
2
sensor to
allow the oxygen saturation graph to be displayed in addition to the ECG function.
A printer allows documentation of the current ECG graphs before and where necessary, after
defibrillation for comparison and evaluation in emergency medical treatment. The quality of the
ECG printout corresponds to that shown on the display, as this was the only basis for deciding
on the appropriate treatment in the specific emergency situation. Graphic evaluation of the
ECG printout is possible by displaying a 1 mV calibration.
In a further configuration of the device, a pacer module with adjustable modes Fix (analogous
to the S00 Mode), Demand (inhibiting, corresponds to SSI Mode) or Overdrive can be added in
manual mode, allowing transthoracic stimulation via self-adhesive electrodes.
The transthoracic pacer can only be used Ii the event of bradycardia after sedating the patient.
A further area of application is transthoracic stimulation when the heart first begins to beat
bradycardially after defibrillation, in order to allow the necessary oxygen saturation of the
bloodstream to develop.
The device is designed for use anywhere, inside buildings and in the open and special
mounting fixtures are available allowing it to be carried in emergency rescue vehicles, rescue
helicopters or planes. It is designed to be able to accompany the patient from the site of an
accident or emergency to the hospital without changing the electrodes.
