How To Properly Use The Defibrillation Electrode Pads ?

      Cardiac arrest occurs from time to time on various occasions, and when cardiac arrest occurs, more than 80% of patients develop ventricular fibrillation.

   Ventricular fibrillation is the abbreviation of ventricular fibrillation, refers to the rapid and weak contraction of ventricular muscle or uncoordinated rapid fibrillation, the result is no cardiac output, pulse and blood pressure disappear, heart and brain and other organs and surrounding tissues blood perfusion stop. Ventricular fibrillation if more than 4-6 minutes, brain tissue is permanent damage; More than 10 minutes and you're brain dead.

    The single most effective treatment for ventricular fibrillation is electroshock defibrillation, a high-energy electrical pulse released by the defibrillator that immediately terminates the abnormal electrical activity of the heart, restoring sinus rhythm and bringing the patient back to life.


     The AED plate has two positive and negative electrodes. During discharge, the current enters the patient from the positive electrode and returns to the AED from the negative electrode, forming a circuit., most of which have two pairs of sizes, the large one for adults and the small one for children. There are two kinds of electrode plate placement in external cardioversion. One  is called the  anteroposterior position, in which one electrode plate is placed  on the SUB scap ular ares of the back and the other on the left margin of the STERNUM at the inter costerl  level 3 to 4 times. It is thought that this way more electrical current is passed through the heart, so less electricity is needed and potential complications are reduced. This method is appropriate for selective electrical cardioversion. The other is a electrode plate placed on the right margin of the sternum 2-3 intercostal (bottom of the heart), the other is placed in the left axillary front of the 5th intercostal (apex of the heart). This method is quick and convenient, suitable for emergency shock defibrillation.

 When pasting the electrode plate, the positive electrode is pasted under the right clavicle of the patient, and the negative electrode is pasted outside and below the left nipple of the patient.The lower left position: the electrode slice of the lateral left breast was in the midaxillary line, and the upper edge of the electrode slice was about 7cm away from the axilla.

What are the precautions:

1. The energy of AED can reach 200 joules in an instant. In the process of rescuing patients, please keep away from the patients immediately after pressing the power button, and warn anyone around you not to touch or approach the patients. 

2. The patient should not use the AED in water. If there is sweat on the chest, the patient needs to quickly dry the chest, because water will reduce the efficacy of the AED.

3. If the patient does not have any vital signs (no breathing and heartbeat) after using the AED, the patient needs to be sent to the hospital immediately.

Post time: Sep-29-2022