Defibrillation – a process that eliminates the ventricular fibrillation of the heart. Fibrillation or ventricular flicker is a pathological state when there are no effective contractions of the heart.
This condition does not stop in a moment, this is only possible with the help of electric defibrillation.
Now devices for intensive care and resuscitation have a lot of opportunities. They use bi-phase pulse shape. This means that the current passes twice through the heart in a short passage of time. But the power of the pulse is reduced, and the myocardium less injured. This equipment ensures the safety of the patient and staff.
If the defibrillators were heavy stationary equipment, now is a lightweight, portable product that can run from mains, battery and even batteries.
Defibrillator-monitor REMA-21 provides EIT at carrying out resuscitation and the treatment of persistent and sudden heart rhythm disorders. The equipment is ideally suited to emergency medical care and in the hospital and in the ambulance. Biphase pulse shape is a modern solution which involves a two-fold current is passed through the heart for a short time. Due to this pulse is less powerful and causes less harm to the myocardium.
What are the characteristics of a defibrillator make it the best?
Since Paul the Probe in 1956 proposed the idea to use electric shocks to restore heart rhythm, defibrillators have undergone many changes. Already more than half a century happen research and observations that help to understand which method of electrical treatment is most effective and least traumatic for the tissues of the body.
In particular, the study of the impact of phases defibrillation pulse of bipolar shape on the membrane of cardiomyocyte, Russian scientists have identified a definite pattern. If you start from the threshold of excitation of the membrane of the cardiomyocyte, on the model of Luo-Rudy, the most effective pulses: quasi-sinusoidal stepped, classical quasi-sinusoidal and trapezoidal with sloping front and cut.
The study helped to put forward the scientific position is that the quasi-sinusoidal biphasic pulse shape is the “gold standard” defibrillation of the ventricles of the heart.
The prevalence of AEDs in developed countries
In the United States and European countries special programmes are implemented, involving the equipment of automatic defibrillators not only health care. It is supposed to install them in places where there is always a large number of people, in particular, railway stations, schools, concert halls, airports, hotels. Defibrillator with automatic mode of operation is able to track the rhythm of the heart muscle and, if necessary, proposes to perform the defibrillation. In order to use this device, do not need knowledge of cardiology or professional experience.
Experts from the UK believe that the installation of such equipment can save thousands of lives in the next 10 years. Airports of the United States introduced mandatory rule that every plane should be a defibrillator. If no, the plane has no right to land at the airport of America.
Application in Ukraine
Why critical speed of providing defibrillation?
When the heart ceases to pump blood, every cell of the body undergoes oxygen starvation. Particularly affected in this respect the brain. If the cell is not getting oxygen, it dies. Therefore, hypoxia is able to make a healthy person disabled of varying severity.
Only 30% of people survive after the heart stops. And only 3.5% of people continue a normal life without severe health problems. It is critical to provide assistance in the first few minutes of fibrillation of the heart. Each additional minute reduces the chance of survival by 10%. Therefore, the quality of equipment, without exaggeration, vitally important aspect of the work of the physician.