Does an angeoplasty necessarily entail the insertion of a stent?

No, angioplasty does not necessarily entail the insertion of a stent. Angioplasty, specifically balloon angioplasty, involves using a balloon to widen a narrowed blood vessel. While a stent is often placed afterward to keep the vessel open and prevent re-narrowing, it is not a required component of the procedure; some angioplasties may be performed without stenting.