Step 1 : Introduction to the question "6. What type of surgery involves widening a blood vessel?"
...1. dentaviolar surgery 2. blood surgery 3. angioplasty 4. plasma surgery The technique is mechanically widening a blood vessel that is narrow or blocked. This is done by putting tightly folded balloons into the small and not very wide parts. Then the balloons are inflated to a pre-determined size. The water pressure is the same as 6 to 20 Earth atmospheres.
