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Angioplasty

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Angioplasty is a minimally invasive endovascular procedure used to widen blood vessels. These vessels may be narrowed or obstructed by a buildup of material. This condition is often caused by atherosclerosis, which is the buildup of cholesterol-laden plaques.

Balloon-catherter
Balloon-catherter

Doctors use this technique to restore proper blood flow to vital organs. It is also known as balloon angioplasty or percutaneous transluminal angioplasty. This procedure is a common way to treat various vascular diseases without large surgical incisions.

The process begins by gaining access to the vascular system. Doctors typically enter through an access vessel like the femoral or radial artery. They use a method called the Seldinger technique to insert an introducer sheath.

Balloon-Tipped Catheter
Balloon-Tipped Catheter

A guide-wire is then passed through the narrowed section, known as a stenosis. A balloon catheter is moved over this wire into the desired position. To see the progress, doctors use fluoroscopy, which is real-time X-ray guidance. They also use a radiopaque contrast dye to make the vessels visible on screens.

Ha1
Ha1

Once positioned, the balloon is inflated using a mixture of water and contrast dye. This inflation can reach 75 to 500 times normal blood pressure. This pressure forces the vessel and its muscular wall to expand.

Angioplasty - Balloon Inflated with Stent
Angioplasty - Balloon Inflated with Stent

In many cases, doctors will also insert a stent during the procedure. A stent is a small mesh tube that helps keep the vessel open. After the stent is placed, the balloon is deflated and withdrawn. There are different types of interventions depending on the patient's needs. For example, percutaneous coronary intervention (PCI) specifically refers to angioplasty performed on the heart's arteries. Some doctors may also use drug-coated balloons to help prevent the vessel from narrowing again.

Angioplasty can be used in many different parts of the body. Coronary angioplasty treats the arteries of the heart to relieve symptoms like angina. Angina is chest pain caused by reduced blood flow. Peripheral angioplasty treats vessels outside the heart, such as those in the abdomen or legs. This can help patients with claudication, which is leg pain during movement. Renal artery angioplasty is used to treat narrowings in the kidney's arteries. Carotid angioplasty can treat the arteries in the neck to reduce stroke risk. Finally, venous angioplasty can treat narrowed veins, such as those used for dialysis.

Sometimes, the plaque in the vessel is very hard and calcified. In these difficult cases, doctors use an adjunctive therapy called atherectomy. This helps prepare the lesion so the balloon can work better. Rotational atherectomy uses a diamond-encrusted burr that spins at high speeds to grind the plaque. Orbital atherectomy uses a diamond-coated crown that orbits within the vessel. Another option is excimer laser coronary angioplasty, which uses ultraviolet laser energy to ablate the tissue. These tools help modify the plaque to allow for better expansion.

While angioplasty is lower-risk than major surgery, it does have specific risks. One risk is embolization, where debris is launched into the bloodstream. There is also a risk of bleeding from over-inflation or from the access site. Patients may develop a hematoma, which is a collection of blood under the skin. In carotid angioplasty, a serious complication called cerebral hyperperfusion syndrome can lead to a stroke. Additionally, angioplasty may be less durable than bypass surgery, as the vessel might experience restenosis, or re-narrowing.

Because of these factors, doctors must choose the right approach for each patient. For example, in cases of severe leg ischemia, bypass surgery might be preferred for long-term results. Guidelines suggest balloon angioplasty for patients with a life expectancy of two years or less. In the heart, doctors may avoid angioplasty if the narrowing is less than 70 percent. This is because the stenosis is not considered hemodynamically significant at that level. Choosing the correct access point is also vital, as the radial artery often has lower bleeding risks than the femoral artery.

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File:Ha1.jpg
Ha1.jpg
File:Balloon-Tipped Catheter.png
Balloon-Tipped Catheter.png
File:Angioplasty - Balloon Inflated with Stent.png
Angioplasty - Balloon Inflated with Stent.png
File:Balloon-catherter.png
Balloon-catherter.png
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