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Heart Defibrillators & AED Machines

Defibrillators, also know as AED Machine (Automated External Defibrillators), are medical devices designed to stop heart fibrillation or irregular heartbeats. Essentially, they de-fibrillate the heart. This treatment intervention emits a high energy electrical pulse of 50 to 360 joules. The energy pulse stimulates the heart back to normal operation. This heart resuscitation treatment restores an uneven, too fast or too slow heart pattern to its normal, healthy heartbeat. An irregular heartbeat or arrhythmia places the patient at risk of cardiac arrest. Cardiac arrest interrupts the flow of oxygen and blood throughout the body. The lack of oxygen and blood produces organ failure and death. Cardiac defibrillators jump-start the heart to transition back to a regular heartbeat and proper function. Click for more information on How to Select the Best Defibrillator

 

 

Types of Defibrillators

 

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What are Arrhythmias?

Arrhythmias are erratic heartbeats. There are two types of arrhythmias that are particularly dangerous. The first is ventricular fibrillation (VF). This is when the heart experiences very rapid beating or an abnormal rhythm. This condition causes the heart to quiver uselessly instead of pumping blood throughout your body. The reduced blood supply results in organ failure. The other is ventricular tachycardia (VT). VT is when the heart speeds up more than 100 beats per minute with at least 3 irregular heartbeats in a row. This condition does not allow the heart to fill with blood before it contracts; thereby, reducing the blood supply. Either condition may lead to cardiac arrest.

Cardiac Arrhythmias

 

What Are the Components of a Defibrillator?

These cardiac stimulators basically consist of a power source, an inductor, a capacitor, a rectifier, a trans-former and electrodes. These components draw energy from the power source, store it, modulate it, and deliver the energy pulse to provide pulmonary resuscitation. The electrodes are placed on the chest of the patient, transferring the charge to their chest cavity.

An automated defibrillator machine has the addition of a monitoring device, algorithm and a series of prompts for the user. These supplemental components determine the current condition of the arrhythmia and the amount of energy required to resuscitate. An automated defibrillator may be operated by almost anyone. One study found that 11 to 12 year olds could follow the prompts and successfully administer life-saving defibrillation.

Key AED Optional Features

Rechargeable Batteries

An AED with a rechargeable battery makes sense for machines that are going to be used often. Non-rechargeable batteries have a service life of around four years, upon which, the batteries must be replaced. Rechargeable batteries need to be replaced every 2 years and have a rechargeable time of 2 to 15 hours. Users that employ rechargeable batteries should have extra batteries available for when recharging is taking place to keep their AED device always ready for an emergency service.

Automatic Function

Semi-automatic AED machines notify the user when to press a button to administer the electrical pulse. Fully-automatic AED devices, instead, do not require the user to press a button to administer the jolt. The automatic AED electronically senses the heartbeat pattern of the patient and auto adjusts the energy pulse to meet the needs of the patient. This pulse is fired automatically without the need of the user to activate the pulse manually. The automatic versions warn the user to not touch the patient and counts-down to the pulse to ensure the safety of the user.

ECG Display

AED’s that have an ECG display allow the user to visualize the ECG waveform on an LCD screen. The user can then interpret for themselves the condition of the patient, allowing them to override the AED’s assessment and deliver a manual pulse to the patient. This function is usually reserved for professional devices.

 

Defibrillator Procedure - How Do Defibrillators Work?

Defibrillators work through a biphasic truncated waveform (BTE) or electrical shock that depolarizes the heart muscles. Depolarizing allows the heart’s normal electrical impulse to re-engage itself. This brief electric impulse interrupts the heart fibrillation and allows the heart muscles to return to their normal sequence and operational pattern.

 

What Are the Types of Defibrillators For Sale

Defibrillator Types

 

There are three types of defibrillators. First are public access defibrillators that are simple and easy to use. They are commonly referred to as Automated External Defibrillators (AED). AED's do not require a prescription and have been found usable by children down to 11 to 12 years old. That's right, an 11-year old can use an AED device to save someone experiencing cardiac arrhythmia. Second are personal devices that are either internally implanted in the patient or worn externally by the patient. These devices are called Implantable Cardioverter Defibrillators (ICD) or Wearable Cardioverter Defibrillators (WCD). Lastly, there are professional devices more commonly used by hospitals, clinics, or first responders called Advanced Life Support (ALS).

AED Defibrillator (Home Defibrillator)

This heart stimulator is portable and automatically detects arrhythmia and then calculates the amount of electrical charge needed to stimulate the heart to regain normal operation. An automated external defibrillator works by attaching the adhesive electrodes to the patient’s chest. The AED then senses the heartrate and determines if defibrillation treatment is necessary. If necessary, it automatically calculates the amount of electrical charge required and prompts the user to initiate the pulse to the patient. Most AED for sale use audio prompts to guide the user step-by-step through the heart resuscitation process. The use of defibrillator AED machines is for anyone who can follow simple prompts.

ICD

This type of defibrillator implants in the patient’s chest or abdomen. It is with the patient 24/7 as a heart monitor and emergency defibrillator. When the device detects a fibrillation, it automatically initiates a treatment pulse to restore normal heart rhythm. Modern ICD’s act as both a defibrillator and pacemaker.

WCD

Wearable cardioverter defibrillators are similar to ICD’s but are external and non-invasive. Instead, the patient simply wears this personal defibrillator.

ALS

ALS devices constitute the next step after an external defibrillator fails to treat an arrhythmia attack. When connected to the patient, it monitors their heart rhythm and allows medical personnel to manually induce an electrical charge. The device analyzes the patient and recommends an electrical dosage to sufficiently stimulate the patient’s heart. These devices are used only by professionals in hospitals, clinics or ambulances.

 

How to Choose the Best Defibrillator

Health practitioners usually select the ICD’s, WCD’s or ALS’s for the patient. However, AED selection usually takes place by someone in the company, business, facility or home. Choosing the best AED for home use is the same as for a business or facility in terms of selection criteria. Below is a selection continuum to graphically see where the different features for AED defibrillators lie followed by a list of purchase considerations and to help you buy defibrillators on sale.

 

Selecting the Best Defibrillator - Continuum of Product Features

Chosing the Bes Defibrillator

Key Selection Criteria

  • Self-test, self-diagnostics
  • Voice prompts
  • Text prompts
  • LED prompts
  • Automated functions
  • Battery life
  • Battery recharging
  • CPR coaching
  • CPR feedback
  • ECG data
  • Pediatric adaptability
  • Interchangeable electrode pads
  • Auto-escalating electrical shock therapy
  • Cost
  • FDA-approved defibrillator device
  • Warranty length and coverage

 

Defibrillator Comparison Chart

Comparing Defibrillators

 

Top Ranking Defibrillator Manufacturers

Defibrillator Manufacturers

Below is a alphabetical list of the top six manufacturers of cardiac treatment devices.

  • Cardiac Science
  • Defibtech
  • HeartSine
  • Philips Healthcare
  • Physio-Control
  • Zoll

 

Medical Studies

 

AED

WCD

ALS Studies

 

 

 

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