A method for vascular embolization of a blood vessel of a patient comprises introducing a novel vascular embolizing agent which is an aqueous solution of a specific thermosensitive polymer, which is liquid at low temperatures but causes coagulation when heated to the body temperature of the patient, into the blood vessel followed by in situ heating of the solution. The thermosensitive polymer found to be suitable for the purpose is a homopolymer or copolymer of an N-substituted (meth)acrylamide monomer having a specified intrinsic viscosity in tetrahydrofuran and gives an aqueous solution capable of exhibiting phase transition from a liquid to a coagulate at a transition temperature of 10 to 37 °C.
一种对病人血管进行栓塞的方法包括将一种新型血管栓塞剂导入血管,然后对溶液进行原位加热,这种新型血管栓塞剂是一种特定热敏聚合物的
水溶液,在低温下呈液态,但加热到病人体温时会引起凝固。适用于这一目的的热敏性聚合物是一种 N-取代(甲基)
丙烯酰胺单体的均聚物或共聚物,在
四氢呋喃中具有特定的固有粘度,其
水溶液能在 10 至 37 °C的转变温度下从液态转变为凝固体。