```json
{
"content": [
{
"type": "paragraph",
"content": "The Coronary Arteries Stent ecosystem links upstream material suppliers, midstream device manufacturers, and downstream clinical distributors that together convert alloys and polymers into implantable stents. Upstream sources deliver medical‑grade stainless steel, cobalt‑chromium, bio‑resorbable polymers, and precision laser‑cutting equipment. Midstream OEMs integrate components, apply surface‑modification technologies, and secure regulatory clearance. Downstream, hospitals, catheterization labs, and specialty distributors handle product allocation, inventory, and post‑implantation services. Value is captured through device sales, reimbursement, and data‑analytics services that monitor outcomes, as illustrated in the value chain analysis."
},
{
"type": "list",
"items": [
{ "text": "Raw material suppliers — provide medical‑grade metals, polymers, and coating chemicals.", "level": 1 },
{ "text": "Component manufacturers — produce laser‑cut stent frames and delivery parts.", "level": 1 },
{ "text": "Technology providers — supply surface‑treatment, imaging, and drug‑elution platforms.", "level": 1 },
{ "text": "OEM / device manufacturers — assemble, test, and obtain regulatory clearance.", "level":