DEFIBRILLATOR
Emergency equipment needed in the OT for restoring normal heartbeat
This equipment allows an electric shock to be applied to the heart to correct ventricular or atrial fibrillation.
- It may be mains or battery operated and can apply the shock through the chest wall or via electrodes placed directly in contact with the walls of the heart.
- When switched on, the defibrillator charges a condenser to a maximum energy of 320 J external application, and 100 J using internal electrodes.
- The level of stored energy output can be continuously controlled between 5 and 320 J and this energy is released in a pulse lasting about 3 milliseconds.
- In the case of atrial fibrillation the defibrillator is coupled with an electrocardiograph so that the defibrillation discharge is delivered in synchronization, normally 40 milliseconds delay after the peak of the R wave of the patient’s ECG.
- Although different makes of defibrillator vary slightly in the method of operation, basically the same technique is used.
- The cardiac recorder defibrillator when used in an emergency the instruction are printed on the side of the box.
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