【冠状动脉支架：小装置，大作用】
冠状动脉支架是微小的网状管。

它们被放置在狭窄的冠状动脉内。

其作用很简单：保持动脉畅通。

恢复血流。

保护心肌。

以下是详细说明：

↳ 用途：治疗冠状动脉疾病和急性心肌梗死。

↳ 机制：球囊扩张阻塞部位的支架。支架作为支撑物留在原位。血流立即恢复。

现代支架并非纯金属。

大多数是药物洗脱支架（DES）。

它们缓慢释放抗增殖药物。

这降低了再狭窄的风险。

其背后的技术：

↳ 高强度钴铬合金或铂铬合金

↳ 激光切割微精密设计

↳ 用于控制药物释放的聚合物涂层

↳ 获批前经过广泛的临床试验

每年，全球都会进行数百万例经皮冠状动脉介入治疗 (PCI)。

支架可以预防心脏病发作。

它们可以减轻心绞痛。

它们可以挽救生命。

它们看起来可能很小。

但它们代表了数十年的心血管研究、生物医学工程和拯救生命的创新。
Coronary Stents: Small Device, Massive Impact

Coronary stents are tiny mesh tubes.
They are placed inside narrowed coronary arteries.
job is simple: keep the artery open.

Restore blood flow.
Protect heart muscle.

Here’s the breakdown:
↳ Purpose: Treat coronary artery disease and acute myocardial infarction.
↳ Mechanism: A balloon expands the stent at the blockage site. The stent stays in place as a scaffold. Blood flow is restored immediately.

Modern stents are not just metal.
Most are drug-eluting stents (DES).
They slowly release antiproliferative drugs.
This reduces restenosis risk.

Technology behind them:
↳ High strength cobalt chromium or platinum chromium alloys
↳ Laser-cut micro-precision design
↳ Polymer coatings for controlled drug release
↳ Extensive clinical trials before approval

Every year, millions of percutaneous
coronary interventions (PCI) are performed worldwide.

Stents prevent heart attacks.
They reduce angina.
They save lives.

They may look small.
But they represent decades of
cardiovascular research, biomedical engineering,
and life saving innovation. http://t.cn/AXitposQ