检测前停抗凝、抗血小板及扩血管药物5天。
Anticoagulants, antiplatelet and vasodilators were not administered 5 days before test.
在一定范围内，其浓度每增减0 .65% ，始凝日期可增减一天。
Increase or decrease of 0.65 percent of the concentration may enhance or delay a day in solidifying period.
所以在常温下，聚乙烯醇水溶液的胶凝会持续数十天或者更长的时间。
At room temperature, PVA would take over ten days or even longer time to gelate.
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