What is the structure of heart stent?
Heart stents are made of stainless steel, nickel-titanium alloy or cobalt-chromium alloy, and different stents have different structures:
1, traditional bare metal support, simple metal network management.
2. Drug-eluting stents, in which drugs are used to inhibit the proliferation of ductal cells and prevent thrombosis.
3. Covered bracket.
What are the characteristics of a good stent?
Flexible; Good traceability; Small head; X-ray opacity; Anti-thrombosis; Good biocompatibility; Reliable expansion performance; Good support; Cover it; Small surface area; Conforming to fluid mechanics
Who is suitable for scaffolding?
1. Acute myocardial infarction
Within 6 hours after myocardial infarction, we should go to a conditional hospital for interventional therapy as soon as possible to quickly open the occluded blood vessels. The recovery effect of cardiac function is better than thrombolysis and drug therapy.
2. Unstable angina pectoris
Because it may evolve into acute myocardial infarction, it is suitable to place a heart stent.
3. Fatigue angina pectoris
If the patient goes further, he may have chest pain, chest tightness and other uncomfortable symptoms. Sit-in or rest will relieve symptoms.
4. Tetralogy of Fallot
The patient's coronary artery anatomy is abnormal, and the risk of percutaneous right ventricular outflow tract implantation is less than that of simple operation.
5. Complex congenital heart disease
Complex congenital heart diseases such as severe pulmonary stenosis or pulmonary atresia are suitable for percutaneous arterial catheter placement.
Four methods of use
During the treatment, the doctor first extends the extremely thin catheter through the blood vessel to the artery stenosis; Then, use an inflatable rubber balloon to open the narrow part; Finally, the artery stent is supported at the dilated artery stenosis to prevent it from retracting. After all the catheters were withdrawn, the arterial stent remained at the dilated arterial stenosis.
Step 5 Use time
Restenosis can occur 6 ~ 8 months after stent implantation, that is to say, restenosis can occur in the stent. The incidence of restenosis is about 20% (15% ~ 40%) at the initial stage of metal stent use. In the era of drug stent, the incidence of restenosis dropped to about 9%. If coronary angiography is reviewed half a year after operation, there is no in-stent restenosis, generally speaking, restenosis will rarely occur in the future.
Six cost problems
The question you choose depends on what stent, what hospital and what area, and the difference is quite big. Domestic prices are generally 30,000-50,000 yuan, and foreign prices are generally higher. Of course, foreign countries are better, such as Singapore and Britain, which all have soluble stents.