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Objective To observe changes of venous blood gas when applying tourniquets to arterial bleeding dog models and compare the injury of the bundled tissues caused by three different tourniquets. Methods A total of 18 dogs were randomly divided to three groups and made into femoral artery bleeding model of the hind limbs. Then, rubber tubing, half-hitch tourniquet and multi-function pressure-control bandage (hemostatic bandage group) were employed respectively for femoral artery hemostasis in three groups. The pressure produced by the bandage and femoral vein blood gas indices were measured at 0.5, 1, 3 and 6 hours respectively after tourniquet application. Results The pressure produced by the hemostatic bandage group was 0.74 kg, which was obviously lower than 1.46 kg in the rubber tubing group and 2.09 kg in the half-hitch tourniquet group ( P < 0.05 ). At one hour after hemostasis, PvO2 was (36.45 ± 10.45 )mm Hg in the hemostatic bandage group and (28.73 ± 9.07 )mm Hg in the rubber tubing group, which was significantly higher than (21.87 ±4.30) mm Hg in the half-hitch tourniquet group ( P < 0.05 ). At 3 and 6 hours after hemostasis, PvCO2 was (50.67 ± 9.31 ) mm Hg and (60.02 ± 10.85)mm Hg respectively in the hemostatic bandage group, while (16.85 ± 16.51 )mm Hg and ( 60.02 ± 10.85) mm Hg respectively in the rubber tubing group, which were lower than that in the half-hitch tourniquet group ( P < 0.05 or 0.01 ) . Conclusion Compared with rubber tubing and Halfhitch tourniquet, the hemostatic bandage can efficiently stop bleeding under slight pressure, with the least injury to the bundled tissues. 相似文献
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Objective To observe changes of venous blood gas when applying tourniquets to arterial bleeding dog models and compare the injury of the bundled tissues caused by three different tourniquets. Methods A total of 18 dogs were randomly divided to three groups and made into femoral artery bleeding model of the hind limbs. Then, rubber tubing, half-hitch tourniquet and multi-function pressure-control bandage (hemostatic bandage group) were employed respectively for femoral artery hemostasis in three groups. The pressure produced by the bandage and femoral vein blood gas indices were measured at 0.5, 1, 3 and 6 hours respectively after tourniquet application. Results The pressure produced by the hemostatic bandage group was 0.74 kg, which was obviously lower than 1.46 kg in the rubber tubing group and 2.09 kg in the half-hitch tourniquet group ( P < 0.05 ). At one hour after hemostasis, PvO2 was (36.45 ± 10.45 )mm Hg in the hemostatic bandage group and (28.73 ± 9.07 )mm Hg in the rubber tubing group, which was significantly higher than (21.87 ±4.30) mm Hg in the half-hitch tourniquet group ( P < 0.05 ). At 3 and 6 hours after hemostasis, PvCO2 was (50.67 ± 9.31 ) mm Hg and (60.02 ± 10.85)mm Hg respectively in the hemostatic bandage group, while (16.85 ± 16.51 )mm Hg and ( 60.02 ± 10.85) mm Hg respectively in the rubber tubing group, which were lower than that in the half-hitch tourniquet group ( P < 0.05 or 0.01 ) . Conclusion Compared with rubber tubing and Halfhitch tourniquet, the hemostatic bandage can efficiently stop bleeding under slight pressure, with the least injury to the bundled tissues. 相似文献
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目的 通过动物实验观察三种止血带在控制犬下肢动脉出血时静脉血气指标的变化,分析并比较不同止血带对束扎侧组织的损伤程度.方法 将18只犬完全随机分为三组,并制作成后肢股动脉出血模型.采用橡皮管止血带、卡式止血带和多功能自控加压止血绷带(简称止血绷带)三种止血带对三组犬进行股动脉止血.分别测量三组犬止血带下压力并在止血后0.5,1,3,6 h检测束扎肢体静脉血气指标.结果 (1)止血绷带组的带下压力为0.74 kg,显著小于橡皮管止血带组(1.46 kg)和卡式止血带组(2.09 kg)(P<0.05).(2)止血后1 h,止血绷带组静脉血氧分压(PvO2)为(36.45±10.45)mm Hg,橡皮管止血带组为(28.73±9.07)mm Hg,均高于卡式止血带组的(21.87±4.30)mmHg(P<0.05);止血后3,6 h,止血绷带组二氧化碳分压(PvCO2)分别为(50.67±9.31)mm Hg和(60.02±10.85)mm Hg,橡皮管止血带组分别为(16.85±16.51)mmHg和(60.02±10.85)mm Hg,均低于卡式止血带组(P<0.05或0.01).结论 止血绷带在较小压力下能有效止住犬的股动脉出血;在三种止血带中,止血绷带对束侧组织的损伤最小. 相似文献
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GaAlAs,InGaAs,Nd:YAG三种激光热凝固效应的比较 总被引:4,自引:3,他引:4
目的 比较GaAlAs和InGaAs半导体激光与Nd:YAG激光热凝固效应。方法 GaAlAS、InGaAs、Nd:YAG激光以石英光纤输出,照射鸡蛋蛋清,每种激光照射10点,测量蛋白凝固团的直径和高度。光纤输出端功率10w,芯径1mm光斑、直径2mm,照射时间30s。结果 三种波长的激光照射活性蛋白形成凝固的体积大小差异明显,其中InGaAs激光热凝固最强,Nd:YAG激光次之,GaAlAs激光最弱。结论 三种激光的热凝固效应有差异。 相似文献
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目的比较 GaAlAs和 InGaAs半导体激光与 Nd∶ YAG激光热凝固效应. 方法 GaAlAS、 InGaAs、 Nd∶ YAG 激光以石英光纤输出 ,照射鸡蛋蛋清 ,每种激光照射 10点 ,测量蛋白凝固团的直径和高度.光纤输出端功率 10 W,芯径 1 mm光斑、直径 2 mm,照射时间 30 s. 结果三种波长的激光照射活性蛋白形成凝固的体积大小差异明显 , 其中 InGaAs激光热凝固最强 ,Nd∶ YAG激光次之, GaAlAs激光最弱. 结论三种激光的热凝固效应有差异. 相似文献
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目的:探讨人工流产3种麻醉方式的比较。方法:采用本院门诊要求终止妊娠妇女300例,分为3组:A组行宫颈、宫腔利多卡因表面麻醉法;B组:采用丙泊酚静脉麻醉;C组:用氯胺酮0.0005 mg/Kg加阿托品10 mg缓慢静脉推注,必要时追加1/4~1/2剂量。结果:丙泊酚镇痛效果最好,副反应少,但价格稍贵;氯胺酮效果次之,价格便宜但需要严格掌握剂量,谨慎使用。利多卡因价格便宜,副反应少,但镇痛效果不佳。结论:丙泊酚是一种亲脂溶性、短效静脉注射全麻药起效快、代谢快。易于通过血脑屏障并分布于中枢神经系统,经肝脏代谢,随尿排出。操作简便,药量易于控制,术后清醒快,痛苦少,伴发症少,易被病人接受。更适用于基层医疗单位推广实用人流镇痛方法。 相似文献
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目的:对TP-ELISA,TP-PA,TRUST3种梅毒检测方法进行比较,根据各试验的优点和不足,选择一种常规梅毒筛查的理想方法。方法以TP-ELISA,TPPA,TRUST同时检测样本2115例。结果 ELISA阳性者80例,检出率3.8%(80/2115),TP-ELISA阳性同时TPPA阳性77例,符合率96.2%(77/80),TP-ELISA阳性, TPPA阴性3例,假阳性率为3.75%(3/80)。TRUST阳性20例,符合率25%(20/80),TRUST阴性60例,占75%(60/80)。3例ELISA阳性TPPA阴性的TRUST检测结果均为阴性。结论 TP-ELISA可作为梅毒筛查的理想方法。 相似文献
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苑淑渝 《国际放射医学核医学杂志》1990,(1)
LiF(TLD~100),LiF(Mg、Cu)和LiF(Mg、Cu、P)有较好的组织等效和化学稳定性.这些荧光物质的主要TL峰几乎都出现在同样温度(~205℃).本研究的主要目的是比较这三种LiF TL荧光物质的剂量学性质,并且探索它们在不同的剂量学领域中的应用范围.研究发现,LiF(Mg、Cu)在400℃、1小时的 相似文献
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固定矫治技术是口腔正畸临床中一种常用的治疗方法,将托槽粘接于牙面是固定矫治技术的重要步骤.在正畸治疗中,托槽的粘接是暂时性的,要求粘接剂既要有防止脱落的粘结力,同时要避免粘接过程中对牙釉质造成损伤[1].口腔正畸临床中可选择的粘接剂种类繁多,笔者选用口腔正畸临床中常用的3种粘接剂:西湖非调拌型牙釉质粘接剂、3M光固化树脂粘接剂、树脂改良型玻璃离子粘接剂,通多对比使用三种粘结剂后托槽的脱落率及牙釉质脱矿情况,来评估这三种粘结剂的临床使用效果,以期为口腔正畸临床中粘接剂的选择提供理论依据.现将详细结果进行汇报. 相似文献
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本文用Wistar大鼠肺巨噬细胞(alveolar macrophage,简称AM)的胞浆标志酶乳酸脱氢酶(lactate dehydrogenase,简称LDH)和溶酶体的标志酶β-葡萄糖醛苷酶 (β-D-glucuronidase,简称β-glu)的漏出为指标,观察了超声、反复冻融和Triton X-100三种处理方法破碎细胞浆膜和溶酶体膜的适宜条件.并对三种方法的破碎效果进行了比较.结果证明:(1)用形态学方法证明,LDH漏出百分数确实可作为细胞膜破碎程度的指标.(2)三种处理方法的适宜条件分别是:超声时间为50s,超声振幅为10;-20℃冰箱反复冻融5次;0.2%的Triton X-100作用30min.(3)三种处理方法对胞膜的破碎效果是相同的.反复冻融对溶酶体膜的破碎效果低于超声和Triton X-100.本文还对三种破碎细胞方法的优缺点以及处理因子对酶活性的影响进行了讨论. 相似文献
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资料:239例患者病理证实为尖锐湿疣后,随机分为三组:激光烧灼组126例、激光烧灼加干扰素肌内注射组60例及激光烧灼加局部注射5-氟脲嘧啶(5-Fu)组53例. 相似文献
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高祥英 《中外医用放射技术》2005,(10):53-54
目的:评论三种全程钡餐透视的应用。方法:按不同年龄段随机分成三组,每组60人。分别用不同方法做全程钡餐透视。结果:用水及半流质食物者速度较快。 相似文献