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出血时间(BT)是指皮肤毛细血管受特定条件的外伤后,从开始出血至自行停止所需的时间。主要与毛细血管的收缩力和粘合力、血小板的粘附和聚集功能、5-羟色胺的释放等有关。临床医师在对BT的检查结果进行分析时,必须对BT的使用和评价有全面的理解。因此,本文就BT的正确使用和评价进行综述。方法的改进1910年Duke首先使用的检查BT的方法是在耳垂刺一伤口,每隔30秒钟用滤纸吸干流出的血液,直至出血停止,正常值范围是1—3分钟。1935年Ivy对BT加以改良,将血压计袖带束于上臂,维持压力在40mmHg,在前
Bleeding time (BT) refers to the skin capillaries after trauma under certain conditions, from the start of bleeding to stop the time required. Mainly with the capillary contractility and adhesion, adhesion and aggregation of platelet function, the release of 5-hydroxytryptamine and so on. When examining the results of BT examination, the clinician must have a comprehensive understanding of the use and evaluation of BT. Therefore, this article reviews the correct use and evaluation of BT. Method Improvement The first method used by Duke in 1910 to detect BT was to prick a wound through the earlobe and blot the outflow with filter paper every 30 seconds until the bleeding stopped. The normal range is 1-3 minutes. 1935 Ivy BT to be improved, the sphygmomanometer cuff beam in the upper arm, to maintain the pressure at 40mmHg, before