What is the Difference Between Monophasic and Biphasic Defibrillators?

Monophasic and Biphasic electric shock therapy are two approaches for administering electric shock to the heart during Sudden Cardiac Arrest (SCA).

Monophasic and Biphasic Defibrillators are often mentioned when discussing cardiac defibrillation devices, so in this article, we'll address their differences and highlight any similarities. 

An AED (Automated External Defibrillator) can play a vital role in helping those recovering from sudden cardiac arrest (SCA). 

AEDs work by providing an electric shock to restore normal heart rhythm. Best of all, AEDs are designed for anyone to use, even children! 

They are smart devices designed to assess a person's heart rhythm and determine if an electric shock should be delivered if necessary. 

Defibrillators owe much of their success to the electric waveform used to deliver a shock. There are two primary options for defibrillators: monophasic and biphasic. 

Biphasic defibrillators have become more widely adopted due to their added advantages in lifesaving. Most modern defibrillators feature biphasic technology. 

What is Monophasic Defibrillation? 

Monophasic defibrillation provides a single, direct electric shock to restore normal rhythm to your heart. 

Although effective, exercise requires increased energy expenditure, which can place additional strain on both heart and body. 

What is Biphasic Defibrillation? 

Biphasic defibrillation is an advanced technique that involves sending an electric current in two phases. 

The first phase directs shock energy from one electrode to another, while the second phase directs current back towards its starting electrode. 

This method enables the current to travel through the heart twice, increasing efficiency while simultaneously using less energy. 

At Buy AED India, our top priority is safety and effectiveness; that is why all our AEDs utilize biphasic defibrillation technology. 

Biphasic AEDs not only produce equal or superior results compared to monophasic devices, but they can also ease strain on patients by offering lower peak energy levels. 

Medical professionals and first responders frequently turn to them.  

Buy AED India provides modern, reliable, and safe defibrillators designed to save lives efficiently and effectively. 

Key Differences Between Monophasic and Biphasic Defibrillators 

Let’s compare the two side by side to make things clear. 

1. Energy Delivery 

• Monophasic: Delivers energy in one direction. 

• Biphasic: Delivers energy in two directions, making it more efficient. 
  

2. Effectiveness 

• Monophasic: Less effective, with lower success rates. 

• Biphasic: More effective, especially for the first shock. 
  

3. Energy Requirement 

• Monophasic: Requires higher energy, increasing the risk of heart damage. 

• Biphasic: Works with lower energy levels, reducing harm. 
  

4. Size and Portability 

• Monophasic: Bulkier and harder to transport. 

• Biphasic: Compact and portable, perfect for emergencies. 
  

5. Cost 

• Monophasic: Cheaper initially, but may have higher long-term costs. 

• Biphasic: Higher initial cost but offers better outcomes. 
  

6. Strength of the Current 

At Buy AED India, biphasic defibrillators deliver effective shocks with lower energy (120-200 joules), reducing the risk of heart damage compared to monophasic models that use 200-360 joules.

This makes biphasic defibrillators a safer and more efficient choice for treating SCA. 

7. Battery Life 

Biphasic defibrillators from Buy AED India have longer battery life since they use less energy per shock, conserving power.  

Monophasic models, with higher energy requirements, drain batteries faster.

For reliable, cost-effective options, explore Buy AED India biphasic AEDs with long-lasting or rechargeable batteries. 

Monophasic and Biphasic Defibrillators: What is the Difference? 

Monophasic and biphasic defibrillators are two types of devices that differ in how they deliver the electric shock to the heart. 

• Monophasic Defibrillators: These deliver the electric shock in a single direction through the heart. 

• Biphasic Defibrillators: These deliver the shock in two phases, first in one direction and then in the opposite direction. 

This difference in energy flow might seem small, but it has a significant impact on effectiveness and patient safety. 

How Monophasic Defibrillators Work?

Monophasic defibrillators are the older type. They send the electric current in one straight path between two electrodes placed on the patient’s chest. 

Benefits of Monophasic Defibrillators 

• Simplicity: They have a straightforward design and are easy to use. 

• Low Initial Cost: Monophasic defibrillators are less expensive to purchase. 
  

Drawbacks of Monophasic Defibrillators 

• Higher Energy Levels Needed: These devices need more energy to achieve the same result, which can cause damage to the heart. 

• Less Effective: Their success rate is lower compared to biphasic defibrillators. 

• Bulkier Design: Monophasic defibrillators are usually larger and less portable. 

How Biphasic Defibrillators Work?  

Biphasic defibrillators are the more modern option. They deliver the electric current in two phases, first in one direction and then in the opposite direction.   

This dual-phase energy delivery is more efficient. 

Benefits of Biphasic Defibrillators 

• Lower Energy Levels: They require less energy, reducing the risk of heart damage. 

• Higher Success Rates: Biphasic defibrillators are more effective at restoring a normal heart rhythm, especially on the first attempt. 

• Compact and Portable: These devices are smaller and easier to carry, making them ideal for ambulances and public spaces. 
  

Drawbacks of Biphasic Defibrillators 

• Higher Initial Cost: They are more expensive than monophasic defibrillators. 

Why are Biphasic Defibrillators Preferred today?

Biphasic defibrillators have become the standard in hospitals, ambulances, and public spaces.  

Why?  

Because they’re safer, more effective, and easier to use. Here’s why they are preferred: 

• They cause less damage to the heart due to lower energy levels. 

• They have higher success rates in restoring normal heart rhythms. 

• They’re lightweight and portable, making them easier to use in emergencies. 
  

Are Monophasic Defibrillators Still in Use? 

Yes, monophasic defibrillators are still used in some settings, mainly because they’re cheaper.  

However, their usage has declined as more facilities are upgraded to biphasic technology. 

How to Choose the Right Defibrillator?

If you’re considering a defibrillator for a hospital, clinic, or even home use, here are some factors to think about: 

1. Effectiveness: Biphasic defibrillators are the gold standard. 

2. Budget: While monophasic devices are cheaper, biphasic devices are worth the investment. 

3. Portability: For emergencies in public spaces, a compact biphasic defibrillator is ideal. 

4. Ease of Use: Many biphasic devices come with automated features that guide users through the process. 

Future of Defibrillator Technology 

The future of defibrillators looks bright, with advancements making them even more user-friendly and effective. Here are some trends to watch: 

• AI-Powered Devices: More accurate rhythm analysis and better decision-making. 

• Wearable Defibrillators: Devices integrated into clothing for at-risk patients. 

• Improved Training Features: Built-in video tutorials and step-by-step guides. 

Conclusion 

Monophasic and biphasic defibrillators serve the same purpose: saving lives.  

However, biphasic defibrillators are the clear winner when it comes to effectiveness, safety, and portability.  

They’re the go-to choice in most modern settings, from hospitals to public spaces.  

If you’re looking to invest in a defibrillator, understanding these differences will help you make the right decision. 

FAQs 

1. Are monophasic defibrillators still in use? 

Yes, they’re still used in some settings, but are less common due to the advantages of biphasic technology. 

2. Is a biphasic defibrillator safer for patients? 

Absolutely! Biphasic defibrillators use lower energy levels, reducing the risk of damage to the heart. 

3. Why are biphasic defibrillators more expensive? 

They are more advanced and efficient, offering better outcomes and modern features, which justify their higher cost. 

4. Can I use a monophasic defibrillator at home? 

It’s possible, but biphasic defibrillators are recommended for their safety and ease of use. 

5. What’s the biggest benefit of biphasic defibrillators? 

Their efficiency! They restore normal heart rhythms with lower energy and higher success rates.