embolization

As an adjective minimal

is the smallest possible amount, quantity, or degree.

As a noun embolization is

(surgery) a nonsurgical, minimally invasive procedure that effects the selective occlusion of blood vessels by purposely introducing emboli.

As an adjective nonsurgical

is being medical treatment that does not involve surgery, such as use of drugs or physical therapy.

As a noun embolization is

(surgery) a nonsurgical, minimally invasive procedure that effects the selective occlusion of blood vessels by purposely introducing emboli.