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Stent

Drug-eluting stents; Urinary or ureteral stents; Coronary stents

 

A stent is a tiny tube placed into a hollow structure in your body. This structure can be an artery, a blood vessel, or something such as the tube that carries urine (ureter). The stent holds the structure open.

Description

 

When a stent is placed into the body, the procedure is called stenting. There are different kinds of stents. Most are made of a metal or plastic mesh-like material. However, stent grafts are made of fabric. They are used in larger arteries.

A coronary artery stent is a small, self-expanding, metal mesh tube. It is placed inside a coronary artery after balloon angioplasty. This stent prevents the artery from re-closing.

A drug-eluting stent is coated with a medicine. This medicine helps further prevent the arteries from re-closing. Like other coronary artery stents, it is left permanently in the artery.

 

Why the Procedure Is Performed

 

Most of the time, stents are used when arteries become narrow or blocked.

Stents are commonly used to treat the following conditions that result from blocked or damaged blood vessels:

  • Coronary heart disease (CHD) (angioplasty and stent placement - heart)
  • Peripheral artery disease (angioplasty and stent replacement - peripheral arteries)
  • Renal artery stenosis
  • Abdominal aortic aneurysm (aortic aneurysm repair - endovascular)
  • Carotid artery disease (carotid artery surgery)

Other reasons to use stents include:

  • Keeping open a blocked or damaged ureter (percutaneous urinary procedures)
  • Treating aneurysms, including thoracic aortic aneurysms
  • Keeping bile flowing in blocked bile ducts (biliary stricture)
  • Helping you breathe if you have a blockage in the airways

 

Risks

 

Related topics include:

  • Angioplasty and stent placement - heart
  • Angioplasty and stent placement - peripheral arteries
  • Percutaneous urinary procedures
  • Transjugular intrahepatic portosystemic shunt (TIPS)
  • Carotid artery surgery
  • Aortic aneurysm repair - endovascular
  • Thoracic aortic aneurysm

 

 

References

Teirstein PS, Lytle BW. Interventional and surgical treatment of coronary artery disease. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 74.

White CJ. Atherosclerotic peripheral arterial disease. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 79.

Zeidel ML. Obstructive uropathy. In: Goldman L, Schafer AI, eds. Goldman's Cecil Medicine. 25th ed. Philadelphia, PA: Elsevier Saunders; 2016:chap 123.

 
  • Stent

    Stent

    Animation

  •  

    Stent - Animation

    If you have a blocked artery in your heart, legs, or neck, you may need a stent to keep your blood flowing to prevent serious problems. Let's talk today about stents. A stent is a tiny tube we place in an artery, blood vessel, or other duct (such as the one that carries urine) to hold the tubes open. A stent is left in permanently. Most stents are made of metal or plastic mesh-like material. Stent grafts made of fabric are often used in larger arteries. Stents are used to treat a variety of artery and other problems. Your doctor will make a small cut in a blood vessel in your groin and thread a thin, flexible tube called a catheter to the place in your body where you need a stent. In the heart, a fatty substance called plaque can build up inside the coronary arteries. Plaque narrows the arteries, reducing the flow of oxygen-rich blood to the heart. One stent, called an intraluminal coronary artery stent, is a small, self-expanding, metal mesh-like tube that is placed inside a coronary artery after balloon angiography. This stent prevents the artery from re-closing. Another stent is coated with medicine that helps further prevent an artery from re-closing. In the carotid arteries, which are on both sides of your neck, plaque can build up and slow the flow of blood to your brain. Stents can keep the carotid arteries open. Stents can also open up narrow arteries in your legs caused by peripheral arteriole disease. They're also used to treat an abdominal aortic aneurysm, which is when the large blood vessel that supplies blood to your abdomen, pelvis, and legs becomes abnormally large and balloons. After a stent procedure, your doctor will probably recommend that you take aspirin and another anti-clotting medication to prevent blood clots from forming in the stent. Make sure that you talk to your doctor, before getting a stent, about the risks associated with placing a stent to treat your condition, such as tissue growing around the area where the stent was placed.

  • Coronary artery stent

    Coronary artery stent - illustration

    An intraluminal coronary artery stent is a small, self-expanding, stainless steel mesh tube that is placed within a coronary artery to keep the vessel open. It may be used during a coronary artery bypass graft surgery to keep the grafted vessel open, after balloon angioplasty to prevent reclosure of the blood vessel, or during other heart surgeries.

    Coronary artery stent

    illustration

  • Coronary artery balloon angioplasty - Series

    Coronary artery balloon angioplasty - Series

    Presentation

  • Stent

    Animation

  •  

    Stent - Animation

    If you have a blocked artery in your heart, legs, or neck, you may need a stent to keep your blood flowing to prevent serious problems. Let's talk today about stents. A stent is a tiny tube we place in an artery, blood vessel, or other duct (such as the one that carries urine) to hold the tubes open. A stent is left in permanently. Most stents are made of metal or plastic mesh-like material. Stent grafts made of fabric are often used in larger arteries. Stents are used to treat a variety of artery and other problems. Your doctor will make a small cut in a blood vessel in your groin and thread a thin, flexible tube called a catheter to the place in your body where you need a stent. In the heart, a fatty substance called plaque can build up inside the coronary arteries. Plaque narrows the arteries, reducing the flow of oxygen-rich blood to the heart. One stent, called an intraluminal coronary artery stent, is a small, self-expanding, metal mesh-like tube that is placed inside a coronary artery after balloon angiography. This stent prevents the artery from re-closing. Another stent is coated with medicine that helps further prevent an artery from re-closing. In the carotid arteries, which are on both sides of your neck, plaque can build up and slow the flow of blood to your brain. Stents can keep the carotid arteries open. Stents can also open up narrow arteries in your legs caused by peripheral arteriole disease. They're also used to treat an abdominal aortic aneurysm, which is when the large blood vessel that supplies blood to your abdomen, pelvis, and legs becomes abnormally large and balloons. After a stent procedure, your doctor will probably recommend that you take aspirin and another anti-clotting medication to prevent blood clots from forming in the stent. Make sure that you talk to your doctor, before getting a stent, about the risks associated with placing a stent to treat your condition, such as tissue growing around the area where the stent was placed.

  • Coronary artery stent

    Coronary artery stent - illustration

    An intraluminal coronary artery stent is a small, self-expanding, stainless steel mesh tube that is placed within a coronary artery to keep the vessel open. It may be used during a coronary artery bypass graft surgery to keep the grafted vessel open, after balloon angioplasty to prevent reclosure of the blood vessel, or during other heart surgeries.

    Coronary artery stent

    illustration

  • Coronary artery balloon angioplasty - Series

    Presentation

A Closer Look

 

    Self Care

     

      Tests for Stent

       

         

        Review Date: 6/6/2016

        Reviewed By: Deepak Sudheendra, MD, RPVI, Assistant Professor of Interventional Radiology & Surgery at the University of Pennsylvania Perelman School of Medicine, with an expertise in Vascular Interventional Radiology & Surgical Critical Care, Philadelphia, PA. Review provided by VeriMed Healthcare Network. Also reviewed by David Zieve, MD, MHA, Isla Ogilvie, PhD, and the A.D.A.M. Editorial team.

        The information provided herein should not be used during any medical emergency or for the diagnosis or treatment of any medical condition. A licensed medical professional should be consulted for diagnosis and treatment of any and all medical conditions. Links to other sites are provided for information only -- they do not constitute endorsements of those other sites. © 1997- A.D.A.M., Inc. Any duplication or distribution of the information contained herein is strictly prohibited.
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