目的探讨4℃冷藏保存血小板对体外大失血模型的纠正效果。方法手工汇集(10人份)血小板200mL等分为2×100 mL,分别于4℃冷藏保存和22℃振荡保存,共计制备5×200 mL,等分后放置4℃冷藏冰箱和22℃血小板振荡保存箱。采用血液稀释法...目的探讨4℃冷藏保存血小板对体外大失血模型的纠正效果。方法手工汇集(10人份)血小板200mL等分为2×100 mL,分别于4℃冷藏保存和22℃振荡保存,共计制备5×200 mL,等分后放置4℃冷藏冰箱和22℃血小板振荡保存箱。采用血液稀释法(全血∶盐水=1∶9)制备体外大失血模型,应用TEG检测指标及血常规等指标对比、评价悬浮红细胞、新鲜冰冻血浆与4℃冷藏保存血小板(简称4℃血小板)或22℃振荡保存血小板(简称22℃血小板)按1∶1∶1比例对体外大失血模型的纠正效果。结果保存1、3、5 d时,4℃血小板组和22℃血小板组在对相同血样制备的体外失血模型纠正,Plt(×109/L)从20-27分别升至127-161 vs 128-160(P>0.05),TEG-MA值(mm)由12.7-14.4分别升至45-51 vs 47-50,TEG-R值(min)由27.7-9.9分别升至4.4-4.3 vs 4.5-4.7(P>0.05)。保存7-14 d,4℃血小板组:Plt(×109/L)由18-27纠正到162-161,TEG-MA值(mm)由8.8-14.5纠正为46-43,TEG-R值(min)由24-13纠正为5.5-5.2(P<0.05)。结论按悬浮红细胞、新鲜冰冻血浆和4℃冷藏保存血小板作用于体外大失血模型达到了纠正效果,佐证了4℃冷藏保存10-14 d的血小板具有良好的止血效果。展开更多
To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen overdose.METHODSEight pigs underwent a midline laparotomy following jejunal catheter...To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen overdose.METHODSEight pigs underwent a midline laparotomy following jejunal catheter placement for further acetaminophen intoxication and positioning of a portal vein Doppler flow-probe. Acute liver failure was realized by intrajejunal acetaminophen administration in six animals, two animals were sham operated. All animals were invasively monitored and received standardized intensive care support throughout the study. Portal blood flow, hemodynamic and ventilation parameters were continuously recorded. Laboratory parameters were analysed every eight hours. Liver biopsies were sampled every 24 h following intoxication and upon autopsy.RESULTSAcute liver failure (ALF) occurred after 28 ± 5 h resulted in multiple organ failure and death despite maximal support after further 21 ± 1 h (study end). Portal blood flow (baseline 1100 ± 156 mL/min) increased to a maximum flow of 1873 ± 175 mL/min at manifestation of ALF, which was significantly elevated (P < 0.01). Immediately after peaking, portal flow declined rapidly to 283 ± 135 mL/min at study end. Thrombocyte values (baseline 307 × 10<sup>3</sup>/µL ± 34 × 10<sup>3</sup>/µL) of intoxicated animals declined slowly to values of 145 × 10<sup>3</sup>/µL ± 46 × 10<sup>3</sup>/µL when liver failure occurred. Subsequent appearance of severe thrombocytopenia in liver failure resulted in values of 11 × 10<sup>3</sup>/µL ± 3 × 10<sup>3</sup>/µL preceding fatality within few hours which was significant (P > 0.01).CONCLUSIONDeclining portal blood flow and subsequent severe thrombocytopenia after acetaminophen intoxication precede fatality in a porcine acute liver failure model.展开更多
文摘目的探讨4℃冷藏保存血小板对体外大失血模型的纠正效果。方法手工汇集(10人份)血小板200mL等分为2×100 mL,分别于4℃冷藏保存和22℃振荡保存,共计制备5×200 mL,等分后放置4℃冷藏冰箱和22℃血小板振荡保存箱。采用血液稀释法(全血∶盐水=1∶9)制备体外大失血模型,应用TEG检测指标及血常规等指标对比、评价悬浮红细胞、新鲜冰冻血浆与4℃冷藏保存血小板(简称4℃血小板)或22℃振荡保存血小板(简称22℃血小板)按1∶1∶1比例对体外大失血模型的纠正效果。结果保存1、3、5 d时,4℃血小板组和22℃血小板组在对相同血样制备的体外失血模型纠正,Plt(×109/L)从20-27分别升至127-161 vs 128-160(P>0.05),TEG-MA值(mm)由12.7-14.4分别升至45-51 vs 47-50,TEG-R值(min)由27.7-9.9分别升至4.4-4.3 vs 4.5-4.7(P>0.05)。保存7-14 d,4℃血小板组:Plt(×109/L)由18-27纠正到162-161,TEG-MA值(mm)由8.8-14.5纠正为46-43,TEG-R值(min)由24-13纠正为5.5-5.2(P<0.05)。结论按悬浮红细胞、新鲜冰冻血浆和4℃冷藏保存血小板作用于体外大失血模型达到了纠正效果,佐证了4℃冷藏保存10-14 d的血小板具有良好的止血效果。
文摘To investigate the changes of hemodynamic and laboratory parameters during the course of acute liver failure following acetaminophen overdose.METHODSEight pigs underwent a midline laparotomy following jejunal catheter placement for further acetaminophen intoxication and positioning of a portal vein Doppler flow-probe. Acute liver failure was realized by intrajejunal acetaminophen administration in six animals, two animals were sham operated. All animals were invasively monitored and received standardized intensive care support throughout the study. Portal blood flow, hemodynamic and ventilation parameters were continuously recorded. Laboratory parameters were analysed every eight hours. Liver biopsies were sampled every 24 h following intoxication and upon autopsy.RESULTSAcute liver failure (ALF) occurred after 28 ± 5 h resulted in multiple organ failure and death despite maximal support after further 21 ± 1 h (study end). Portal blood flow (baseline 1100 ± 156 mL/min) increased to a maximum flow of 1873 ± 175 mL/min at manifestation of ALF, which was significantly elevated (P < 0.01). Immediately after peaking, portal flow declined rapidly to 283 ± 135 mL/min at study end. Thrombocyte values (baseline 307 × 10<sup>3</sup>/µL ± 34 × 10<sup>3</sup>/µL) of intoxicated animals declined slowly to values of 145 × 10<sup>3</sup>/µL ± 46 × 10<sup>3</sup>/µL when liver failure occurred. Subsequent appearance of severe thrombocytopenia in liver failure resulted in values of 11 × 10<sup>3</sup>/µL ± 3 × 10<sup>3</sup>/µL preceding fatality within few hours which was significant (P > 0.01).CONCLUSIONDeclining portal blood flow and subsequent severe thrombocytopenia after acetaminophen intoxication precede fatality in a porcine acute liver failure model.
