Defibrillators
Defibrillator allows
the application of electrical stimulus to the heart to convert a ventrical
fibrillation to a sinus rhythm and it is called defibrillation .
• 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 for external application, and 20 to 50
J using internal electrodes.
• The level of stored energy output can be
continuously controled 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 recorders defibrillator when
used in an emergency the instructions are printed on the side of the lid.Any questions be sent to drmmkapue@gmail.com
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