PROBLEM TO BE SOLVED: To provide a surgical hemostatic material substrate for use in a surgical hemostatic material which covers a damaged part with high hemostatic effect, and a surgical hemostatic material which covers a damaged part with high hemostatic effect.SOLUTION: The surgical hemostatic material substrate is made of urethane film. The urethane film has an elongation percentage of 100 to 4,000% according to JIS K6251-2004 for the following imbibition conditions, a 100% modulus of 9.8×10-3 to 4.9 N/mm2 according to JIS K6251-2004 for the following imbibition conditions, and an absorption coefficient of 1.1 to 10 for the following conditions. The imbibition conditions are provided by 3-hour immersion in physiological saline at 25°C. The absorption coefficient is the weight ratio before and after 3-hour immersion in physiological saline at 25°C, i.e. [(weight after immersion)/(weight before immersion)].COPYRIGHT: (C)2014,JPO&INPIT【課題】損傷部を被覆でき、止血効果が高い外科用止血材を得られる外科用止血材基材及び、損傷部を被覆でき止血効果が高い外科用止血材を提供することを目的とする。【解決手段】ウレタンフィルムからなる外科用止血材基材であって、ウレタンフィルムのJIS K6251-2004による下記吸水膨潤時の伸び率が100~4,000%であり、JIS K6251-2004による下記吸水膨潤時の100%モジュラスが9.8×10-3~4.9N/mm2であり、下記吸水率が1.1~10である外科用止血材基材。吸水膨潤時:25℃の生理食塩水に3時間浸したとき。吸水率:25℃の生理食塩水に3時間浸漬したときの浸漬後の重量と浸漬前の重量との比率{浸漬後の重量/浸漬前の重量}。【選択図】なし
