I'm Dr. Small Eyes.

Specializing in cardiovascular diseases

Commitment to public health

Cardiologist with a passion for fitness

If you like my answer, you can click on the upper left corner to see more about cardiovascular diseases

Dr. Small Eyes wants you to know that there is no way to remove a blood vessel placed into a coronary artery. That is, if you have a stent placed in your coronary artery, you may need to carry that stent with you for the rest of your life as well.

I'm sure there will be patients who will ask if there is a lifespan or shelf life for the stent then.

Dr. Small Eyes is very clear that coronary stents do not have a shelf life, which means that a stent placed inside a blood vessel will last a lifetime and does not need to be replaced on a regular basis.

Dr. Small Eyes would also like to tell you that it is not the case that if you have a stent placed that it solves your coronary artery disease, this is a very wrong understanding. The stent solves the problem by simply helping to dilate the narrowed portion of your coronary artery to avoid blockage of the blood vessel due to exercise or plaque rupture, which can lead to a cardiovascular event.

Many patients have the misconception that they don't need to drink their medication after placing a stent.Dr. Small Eyes tells you that such thinking is very scary. In the clinic, Dr. Small Eyes often sees patients who have stents placed and then come over to be hospitalized and have new stents placed from the beginning, because these patients are not taking their medications regularly, which causes the original stent to become blocked again.

See here, I believe that some of the patients can understand this reasoning, in fact, the stent itself does not have a life expectancy, the stent itself will not be damaged, because we in the clinic after placing the stent, we need to evaluate the success of the stent placement, the criteria for determining whether the stent has swollen very well, the stent has not been completely affixed to the coronary artery vessel wall.

The stent that is attached to the coronary artery vessel will slowly fuse with the endothelium over time, and according to my former Little Eye teacher, a few years after the stent is placed, the stent will be able to fully grow into the vessel and even fuse with the vessel.

At this point in time, I believe that some of the patients will have some concern about whether the stent will puncture the vessel because of the apposition process.

Dr. Small Eyes tells you that worries like yours are very redundant in the placement of stents, whichIt will only stick to the wall of the blood vessel completely and will not cause rupture of the blood vessel. Because the stent technology is now very, very mature, and when the stent is applied to the clinic, in fact, it has gone through a lot of experiments, and these risks have been reduced to a very low degree, which is basically the same as it will not happen.

So what is the main material of the bracket.

At present, most of the clinical stents are made of metal materials, from the earliest days, are still stainless steel materials, to the end, with the development of technology, slowly developed into nickel metal rare metal.Dr. Small Eyes would also like to tell you something really great, dissolvable stents are now in the process of being researched, these dissolvable stents will be placed in the body and then slowly dissolve over time, you're going to not need to worry about carrying a stent for the rest of your life.

Having said that, Dr. Small Eyes would like to emphasize the point and hopefully also order you to make sure that you take your medication regularly after placing the stent.

If you have a diagnosis of coronary artery disease, you can say that you will need medication for the rest of your life. Initially, at the time of stent placement, we would recommend that post-PCI patients take a combination of oral aspirin and clopidogrel antiplatelet therapy for one year to avoid thrombosis within the stent.

We will also recommend that patients continue to take his subscription drugs, especially atorvastatin calcium tablets, because atorvastatin calcium tablets not only in lowering blood lipids has a very good effect, but also can stabilize the plaque that has been formed in the blood vessels, for patients with coronary heart disease can be said to be very good drugs

Finally, after preventing the stent, put your mind at ease, you are actually no different from a healthy person, except that you need to take your medication regularly and live a healthy life.

I'm Dr. Small Eyes.

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Cardiac stents (i.e., coronary stents, hereinafter referred to as coronary stents) are one of the most effective measures for the treatment of coronary artery stenosis (≥75%), and once implanted, they are permanent and cannot be removed. Currently, all existing stents are metal stents, and after implantation, they will be fused with the endothelium of the blood vessels, so there is no "expiration date". However, it should be noted that stent implantation is not a one-time fix, and after the operation, it is necessary to cooperate with the regular medication and lifestyle improvement, so as to avoid the formation of thrombus in the stent, which will lead to the coronary re-stenosis, and then the stenosis needs to be placed again. After restenosis, the stent needs to be placed again.The coronary stent enters the body through the peripheral radial artery or femoral artery and reaches the coronary stenosis under the guidance of the guidewire, and the stent is tightly affixed to the endothelium of the coronary artery through the high-pressure dilatation of the balloon. Due to the damage to the endothelium of the blood vessel during the implantation of the stent, the damaged endothelium of the blood vessel will carry out self-reparation (i.e., vascular reendothelialization). The endothelium of the damaged vessel will repair itself (i.e., vessel reendothelialization) and completely encapsulate the stent through the endothelial repair of the damaged vessel (about 6 months).

Coronary stent implantation can quickly open the blood vessels and restore blood supply, which is good for angina pectoris and myocardial infarction caused by coronary artery stenosis. After stent implantation, we should pay attention to: ① Adhere to long-term aspirin, statin drugs, along with the use of one year to one and a half years of clopidogrel or Tegretol, etc.; ② according to the condition of the use of ACEI / ARB drugs, β-blockers, etc.; ③ attention to the monitoring of the process of medication, such as gastrointestinal tract, bleeding of the skin and mucous membranes; ④ pay attention to the re-examination of the control of blood glucose, blood lipids, blood pressure, etc., to meet the standards; ⑤People with underlying diseases (such as hypertension, diabetes, hyperlipidemia, etc.) should actively treat the underlying diseases; ⑥Improve the lifestyle: quit smoking and limit alcohol, appropriate exercise, keep the mindset, reasonable diet, regular work and rest, and control the weight.

We hope that everyone will correctly recognize coronary stents, and active and regular treatment is the key. Do not listen to partial beliefs, so as not to delay the condition. Finally, thanks for reading, and I wish you all good health. This article was originally written by general practice sweeper in today's headlines & Wukong Q&A, please indicate the source.

Thanks for the headline invite, I've been busy lately and haven't had time to answer questions!

1. The first thing we need to understand about this question is how a cardiac stent is implanted into a blood vessel!
   Then we can see that the initial state of the scaffold is a contracted up mesh structure
   , with a balloon encircling the center. The balloon is wrapped around a balloon in the center. After reaching the location of the stenotic vessel, the stent is usually dilated and released at a ratio of 1.1:1 (somewhat larger than normal). The pressure of the release can reach 12 atm-20 atm, which is a concept, the pressure of a car tire is only 2.5 atm! Therefore, the expanded stent is firmly stuck in the blood vessel wall, no matter whether you run or jump, it will not move, and even more will not fall out! However, because everyone's blood vessels are different, some patients have severe calcification of the blood vessel (the elastic wall becomes like an eggshell) or the diameter of the blood vessel is too small, there is a possibility that the blood vessel may rupture when releasing the stent or expanding after the balloon! (This is highlighted in the consent form for the interventional procedure). So to see someone actually say earlier that the vessel will not rupture is purely misleading to the public!
2. Currently the material of the stent is mostly cobalt-nickel or cobalt-chromium alloy, and in half of the cases after 3 months, 1.5-2.0T NMR is not a problem at all. Even the stainless steel stent will not be sucked out after 3 months, but due to the different situation of each local NMR room, they may be reluctant to give it.
3. Is there any way to remove the stent? The stent can be removed except during coronary artery bypass grafting, when the vessel is cut and the stent can be yanked out, but because the endothelium gradually covers the stent completely after it has been attached to the wall, when the stent is yanked out, the endothelium of the vessel is torn off at the same time! This is actually better understood; yanking out something that has grown well will certainly bring down a layer of skin!
4. Stent implantation is not a one-off, the pipes are open and we still have to prevent further scale growth! So we have to take aspirin + clopidogrel/tiglitazarol to fight platelets, statin to lower lipids and stabilize plaque, and strictly quit smoking! Nonetheless, restenosis occurs in 10-20% of patients. Once in-stent restenosis occurs, the treatment can be either re-stenting in the stent or drug-eluting balloon therapy.
   
   
5. Biodegradable/absorbable stents, which have now been called off because of the excessive risk of long term thrombosis. Maybe new improvements will come back out later, that's an afterthought!

If you have cardiovascular questions, feel free to follow along in the upper right corner!

Hello.

Stent implantation can be said to be the most common treatment for patients with coronary heart disease, Mr. Yang is an old patient, nine years ago, he had a heart stent surgery, implanted two stents. A few days ago, I received a request for help from Mr. Yang on Weibo. He had heard that the service life of cardiac stents is usually 10 years.Seeing that his stent is about to "expire", do I need to take it out and re-operate? Let's take Mr. Yang's questions and get to know the heart stent.

Cardiac stents, also known as coronary stents, are medical devices commonly used in percutaneous coronary angioplasty, a cardiac interventional procedure. Stents can continuously play a role in supporting the arteries, resolving the stenosis, and ensuring smooth blood flow. Patients with coronary artery disease are mainly due to myocardial ischemia caused by arterial stenosis. Initially, balloon dilatation was used to treat coronary artery disease, but it was later found that the dilated portion of the balloon would rebound and the blood vessel would be narrowed or occluded again, and so doctors envisioned the use of propped up stents to permanently support the blood vessel for the purpose of preventing the rebound of the artery.

Can the stent still be removed?

The stenting procedure does not take long, but the stent is permanently implanted and cannot be removed and is not necessary.Because when the stent is implanted, the stent is tightly fitted to the endothelium of the blood vessel through balloon dilatation, there is tear damage to the endothelium of the blood vessel from the surgery, and the damaged endothelium will slowly repair itself and gradually wrap the stent completely, and this process is "stent endothelialization"It usually takes about 3 to 6 months, and in some cases, up to 1 year. "After endothelialization of the stent, the stent and the blood vessel have been completely fused together, and when the blood flows, it touches the endothelium of the blood vessel and no longer touches the stent, which can no longer be seen and cannot be removed. Forced surgery to remove the stent may damage the artery and jeopardize his life. This shows that Mr. Yang's worry is redundant.The stent is put in for life and cannot and does not need to be taken out.

The stent only lasts ten years?

The main brackets currently in use areMetal bare stents and drug-eluting stentsTwo types, the main material being a very supportive cobalt-chromium alloy or other specialized material, and which is incorporated into the interior of the blood vessels over time.As long as the stent has completed endothelialization of the vessel, there is no question of longevity, so the claim that stents have a lifespan of only 10 years is scientifically unfounded.

Why do many patients experience reocclusion?

Although the implantation of stents is permanent, the treatment of coronary heart disease is not permanent. Stents only support the narrowed blood vessels and relieve the condition, but do not cure coronary heart disease.The patient's coronary arteries may develop new lesions or blockage at any time, not in the original placement of the stent location of blockage, coupled with the patient's postoperative habits and medication habits, if the postoperative still binge drinking, smoking and alcoholism, staying up all night and not exercising, then re-blockage may occur very soon, and some patients will no longer take medication or do not take the medication according to the doctor's orders after the operation, which is an important reason for the occurrence of re-blockage. This is also an important reason for the occurrence of re-obstruction. In addition, the doctor's operation during the surgery will also affect the service life of the stent, so it is best to choose a large tertiary hospital cardiology department for consultation.

Finally, patients with coronary heart disease are reminded thatCardiac stent surgery can not be once and for all, the systematic treatment after surgery and the secondary prevention of the whole coronary atherosclerosis is the challenge that patients with coronary heart disease really start to face, and healthy living and eating habits are the biggest guarantee for the body.

The placed stents in the heart vessels cannot be taken out. Cardiac stents have gone through several stages of metal stents, drug stents, and biodegradable stents, and at present, drug-coated metal mesh tubular structure stents (e.g., cobalt-chromium alloy, cobalt-nickel alloy) are mainly used in China. After the coronary stent is delivered to the coronary stenosis through the catheter, the balloon that comes with the stent is expanded to 10 atmospheres to open the joints of the stent, and the stent is irreversibly opened. Due to the designed diameter of the stent and the inner diameter of the blood vessel are exactly matched, together with the pressure of the balloon when releasing the stent, the stent will be tightly adhered to the wall of the blood vessel after the release of the stent. After the stent is implanted into the blood vessel, about 4 weeks, part of the stent can be completely covered by the endothelium of the blood vessel, and the vast majority of them will reach the endothelial cells completely covering the metal stent trabeculae within 1 year, and then the stent will become a part of the human body, so there is no way to take the stent out again once it is released.

The purpose of asking this question is presumably to worry about whether the stent has a life expectancy and whether it will have to be taken out and replaced with a new one after a period of time. Or what happens when a coronary stent is put in and there are problems with the stent later, such as restenosis or long blood clots?

Coronary stents can be used all the time as long as there is no restenosis or long blood clots, and there is no life expectancy problem. However, on the other hand, after stenting, there is a real possibility of stent restenosis or long blood clots (annual stent restenosis rate of about 5% to 10%), if encountered in this case, the general treatment is to put another stent in the stenosis, drug balloon technology, cutting balloon, rotary grinding technology, coronary artery bypass grafting and so on, it is not to take out the original stent.

To prevent in-stent restenosis, make sure to change your bad lifestyle habits, take your medication regularly and avoid re-intervention.

It can be removed, but it is not recommended unless absolutely necessary!

If it's for some psychological reason or because of what others say, discount the idea of removing the stent because the impact of removing the stent is definitely higher than the impact of keeping the status quo.

How is a coronary stent implanted?

Before the stent is implanted in the coronary artery, there is a constricted mesh on the outside and a balloon in the center. When the whole is placed in the stenotic coronary artery, a 1:1.1 ratio is installed for the release and the balloon expands to hold the stent firmly against the vessel wall, and the endothelium slowly covers the stent over time, merging into one.

This is why doctors say that once a stent is released, it cannot be reversed and removed because the stent is already part of the body.

How do I remove a coronary stent?

This is something that can't just be fixed by internal medicine, it requires surgical help.

Endothelialization -The implanted stent and part of the endothelium are removed in their entirety, followed by suture buttressing.

But I must emphasize thatThe risks of this approach are high, very high, extraordinarily high.It is a great test of the doctor's skill level and psychological quality.

Breaking and entering is not desirable, but if the situation is critical, everything has to be pushed back in order to save life; life is priceless; life is 1 and the others are 0. Without 1, even if there are more 0s, they will be meaningless.

(This article was originally written by Prof. Luo Min. Some of the pictures in the article are from the Internet, if copyright is involved, please contact me for deletion. If you have any questions, welcome to leave a message at the end of the article, private chat contact, common discussion. (Follow the author of this article to get more medical knowledge, welcome to like, comment, reproduced, common progress)

I. What is the purpose of placing a stent?

Coronary artery revascularization is a treatment that can be used when the stenosis or occlusion of a blood vessel in the heart does not open the stenotic or occluded blood vessel with the use of medication, and when the symptoms cannot be avoided! The common method of coronary revascularization is stent implantation. The purpose of stent implantation is to mechanically resolve the stenosis or occlusion of the blood vessel, thus improving ischemia, which is the purpose of stent placement!

Two. How did the bracket get put in?

Stent implantation, a complex process, requires the creation of a channel and access to a guiding guidewire through which the stent or balloon is delivered! The balloon is usually delivered first to fully pre-dilate the lesion before the stent is delivered! The stent is actually a metal ring that is fixed to the stent balloon, and once delivered to the exact location, the stent balloon is opened and the stent is propped up and then fully apposed to the wall as the balloon pressure increases! Because the stent is metal, there is very little chance of it retracting after it has been dilated, which will give the stenotic vessel a support and thus release the stenosis!

Third, can I still take out the bracket I put in?

The supportive role of the stent is the main reason for ensuring that the vessel does not retract and re-stenose! So the continued presence of the stent is the key to no more stenosis! Because of this, the stent should not be removed, and even if it could be, only if the lesion is completely repaired! Second, after the stent has been applied to the wall with a lot of pressure, the stent is covered by the endothelium of the vessel in about six months, and removing it at that time would make the lesion unstable again, so that's reason number two why the stent can't be removed! Third, the stent put in the current level of technology can not be removed! To summarize the above points, the stent can't be taken out, and it can't be taken out!

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Once a cardiovascular stent is intervened in the body, sorry, it will be a permanent residence

The stent can't be taken out and it will be with you for the rest of your life, so love life and get healthy now.

Stay away from fats and oils, stay away from animal offal, drink more tea, stop smoking, stop drinking, strictly control blood pressure, eat more vegetables, fruits, eat more fish, eat less red meat, switch to white meat, fish and chicken.

If you have high blood lipids, you must follow your doctor's instructions and also take your statin lipid-lowering medication on a regular basis

Don't exercise strenuously and take rest! I hope everyone is healthy!

Stents implanted in the blood vessels of the heart cannot be removed. This is because after a period of time after the implantation of the stent, the stent and the lining of the blood vessel grow together, and if the stent is to be removed, the lining of the blood vessel will be torn down along with it, resulting in damage or even rupture of the blood vessel.

If the stent must be removed, this can only be done by open heart surgery, where the blood vessel is cut open and the stent removed. However, even then, the blood vessel will be damaged, and without the endothelium, the blood vessel will collapse, making it difficult to place a stent or a bypass bridge, which is very costly. Therefore, nowadays, stents are no longer removed permanently after implantation.

While stents cannot be removed, they can be absorbed, and biodegradable stents have been invented. As the stent is made of biodegradable material, it plays the role of supporting the blood vessels and there is no metal left in the heart, which is supposed to be a more ideal state. However, due to material and technical reasons, degradable stents still have many shortcomings.

I believe that biodegradable stents must be the direction of stent development, and it will surely benefit mankind in the foreseeable future.

A heart stent cannot be removed after it has been implanted.

We usually say heart stent surgery can also be called coronary stent implantation, is a kind of interventional surgical treatment by implanting artificial stents in the coronary artery vessels of the heart to give support and dredge the diseased heart blood vessels, to lift the stenosis of the coronary artery of the heart, and to improve the blood flow of the human body. Stent implantation has been an important treatment for cardiac stenosis in the last two decades. Cardiac stents can be categorized into various types according to their materials: bare metal stents, drug-coated stents and soluble stents, all of which cannot be removed.

The cardiac stent is delivered to the narrowed blood vessel of the heart through a catheter at the radial artery of the hand, where a self-contained balloon holds the stent open, at which point the stent is tightly attached to the wall of the blood vessel. Over time, the stent is gradually covered by the lining of the vessel and eventually becomes one with the lining. This operation is irreversible and the stent stays in the coronary vessel for the rest of its life, making it difficult to remove. Even if in-stent restenosis occurs or a new blood clot grows, the stent will not be removed, but another stent will be placed in the stenosis, a medicated balloon technique, or coronary artery bypass grafting will be performed.

Soluble stents are different in that they are made of a special material that can be dissolved, so they are also called biodegradable stents. Soluble stents are implanted into the blood vessel and increase in strength with the wall of the blood vessel, and after a period of time they can be absorbed by the body and decomposed into carbon dioxide and water, which are absorbed by the body, so they are likewise impossible to remove.

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