Flow Diverter Stents: How They are helpful in treating aneurysms

Flow Diverter Stents: How They are helpful in treating aneurysms


In the dynamic world of medical innovation, the treatment of cerebral aneurysms has witnessed a paradigm shift with the advent of flow diverter stents. These remarkable devices have emerged as game-changers, offering a revolutionary approach for treating brain aneurysms. In this blog, we’ll explore the significance of flow diverter stunts and how they have become indispensable tools in the hands of neurovascular specialists , reshaping the landscape of aneurysm treatment.

Understanding Cerebral Aneurysms:

Before delving into the intricacies of flow diverter stents, it’s crucial to understand the gravity of cerebral aneurysms. These are abnormal bulges or weakened areas in the walls of blood vessels within the brain. If left untreated, an aneurysm has the potential to rupture, leading to a life-threatening condition known as subarachnoid hemorrhage. Traditional treatment methods, such as coiling and clipping, have been effective, but the introduction of flow diverter stents has opened up new avenues for intervention.

Understanding Flow Diverters:

Flow diverters are specialized devices designed to redirect blood flow away from an aneurysm—a weakened or bulging blood vessel wall that poses a risk of rupture. Traditionally, aneurysms were treated with methods such as coiling or clipping, but flow diverters offer a less complicated alternative. Composed of a mesh-like material, these devices are inserted into the blood vessel to divert the flow and promote the formation of a stable blood clot, ultimately sealing off the aneurysm.

The Mechanics of Flow Diverter Stents :

At the heart of this innovation lies the intricate design of flow diverter stunts. Composed of a fine mesh-like material, these devices are carefully navigated through the blood vessels to reach the site of the aneurysm. Once in position, the flow diverter acts as a scaffold, redirecting the blood flow away from the weakened vessel wall. This redirection promotes the formation of a stable blood clot in the aneurysm , effectively isolating and sealing off the aneurysm from the surrounding circulation.

Minimally Invasive Precision:

One of the primary advantages of flow diverter stunts is their minimally invasive nature. Conventional endovascular coiling techniques may not effectively treat aneurysms of larger size, as there’s chance of recurrence. Traditional surgical approaches often involve significant incisions and longer recovery times, whereas flow diverters can be deployed through catheters, reducing the impact on the patient. This precision allows for shorter hospital stays, quicker recovery, and a decreased risk of complications associated with more invasive procedures.

Tailoring Treatment to the Individual:

Each patient’s anatomy is unique, and the success of an intervention depends on tailoring the treatment to match these individual variations. Flow diverter stunts exemplify the principles of personalized medicine in action. Neurointerventional radiologists can choose from a variety of flow diverter sizes and shapes, customizing the treatment approach to suit the specific characteristics of each patient’s aneurysm. This personalized strategy enhances the overall safety and efficacy of the intervention.

How Flow Diverter stents Work:

The deployment of a flow diverter stent involves a highly specialized and minimally invasive procedure performed by trained and experienced interventional neuroradiologist. Using advanced imaging techniques such as angiography, the interventional Radiologist guide a catheter through the blood vessels from the groin to the site of the aneurysm. The flow diverter stent is then carefully positioned and released, adapting to the unique anatomy of the patient’s vasculature.

Benefits of Flow Diverter Stents:

  1. Minimally Invasive: Unlike traditional surgical methods, flow diverter stents are inserted through small incisions, reducing the risk of complications and promoting faster recovery.
  2. Highly Effective: Flow diversion has proven to be a highly effective method in isolating aneurysms, with studies showing significant success rates in preventing rupture.
  3. Personalized Treatment: The flexibility of flow diverter stents allows for a personalized approach to treatment, considering the unique characteristics of each patient’s anatomy.
  4. Reduced Recurrence: Flow diverter stents contribute to long-term aneurysm occlusion, minimizing the chances of recurrence and the need for additional interventions.

Navigating the Challenges:

While flow diverter stents offer immense promise, they are not without challenges. The procedure demands a high level of expertise, and complications such as thrombosis or migration of the device can occur. Continuous advancements in imaging technology, physician training, and device refinement are essential to overcoming these challenges and pushing the boundaries of what is achievable in the field.


Flow diverter stents represent a transformative leap in the field of neurovascular intervention, offering hope to individuals with cerebral aneurysms. As technology continues to advance and research progresses, these stents are poised to become even more integral in the treatment landscape of brain aneurysms. With their ability to navigate the intricate pathways of the brain’s blood vessels, flow diverter stents are not just devices; they are the key to a safer and more effective future in aneurysm treatment.


Are there any specific conditions or aneurysm types suitable for flow diverter stent treatment?

Flow diverter stents are particularly effective for wide-necked, side wall aneurysms and fusiform aneurysms, as well as those located in challenging or tortuous vascular pathways. However, the suitability of the treatment is determined on a case-by-case basis by the Neuro interventionist based on the patient’s specific condition.

What are the potential risks or complications associated with flow diverter stent procedures?

While generally considered safe, complications may include thrombosis (blood clot formation) and migration of the stent. These risks are minimized with careful patient selection, proper sizing, and the expertise of the NIR team.

Can flow diverter stents be used for treating multiple aneurysms in one procedure?

Yes, in some cases, a single procedure may be used to treat multiple aneurysms, depending on their location, size, and the patient’s overall health. The decision is made on an individual basis, and the  operating physician will determine the most appropriate course of action.

What is the success rate of flow diverter stent treatments?

Flow diverter stents have shown significant success rates in preventing aneurysm rupture and long-term occlusion. However, individual success may vary based on factors such as the specific characteristics of the aneurysm, expertise of the operator

About the Author:



DR. SURESH GIRAGANI CONSULTANT INTERVENTIONAL RADIOLOGIST at Apollo hospitals Jubilee Hills has more than sixteen years of clinical experience in vascular interventions with a special interest in neurovascular and peripheral vascular disease interventional procedures.




Leave a Reply

Your email address will not be published. Required fields are marked *