Résumé
Objective To provide reference for the cold chain of stored RBCs on the sea by evaluating both blood containers containing phase-changed materials and the quality of stored RBCs during transportation.Methods In order to simulate blood supply on the sea,we transported the stored RBCs on land(100 min),on the sea(45 h)and stored them on the sea for another 7 days.The free hemoglobin(Hb), lactate dehydrogenase(LDH), and concentrations of K +and Na+were measured.Results The temperature of the blood container containing phase-changed materials rose from 4.1℃to 9.5℃.The contents of free Hb,K+and LDH were increased to(0.083 ±0.032)g/L,(15.097 ±1.791)mmol/L, and(106.00 ±17.83)U/L,respectively.During blood storage,the contents of the above three indices were increased to (0.111 ±0.035)g/L,(27.238 ±3.509)mmol/L and(227.00 ±111.94)U/L, while Na +decreased to(113.63 ± 4.012)mmol/L.Conclusion The temperature of the blood container containing phase-changed materials can be maintained at a constant temperature under more complicated environmental conditions,and the quality of the stored RBCs can be ensured.RBCs stored on the sea for more than 7 days are damaged more seriously than those stored on land.
Résumé
Objective To study the changes in coagulation factors stored for different lengths of time after fresh frozen plasma(FFP)thawing.Methods Thirty-two samples of thawed FFP were detected by an automated coagulation analyzer SYSMEX CA-1500 to observe the changes in coagulation function and coagulation factors stored for different lengths of time at 4℃.Results Activated partial thromboplastin time (APTT) was significantly prolonged 12 hours after thawing.However, no significant changes were observed in prothrombin time (PT), thrombin time (TT) or fibrinogen (FIB).Coagulation factors showed varying degrees of attenuation in 24 hours.FⅤ, FⅦ and FⅧ were attenuated significantly in 6 hours by 17.2%, 9.47% and 12.5%, respectively.FⅨ began to attenuate in 12 hours and reached, the lowest rate of 21.1%, while FⅧ had the highest attenuation rate (52.0%) and showed the lowest stability.Conclusion The activity of coagulation factors is decreased with time after FFP thawing ,so it should be transfused as soon as possible to ensure the curative effect and clinical application.
Résumé
Objective To study the method of emergency blood collection during a long-distance voyage to ensure blood transfusion treatment.Methods Ten voluntary blood donors were recruited, a base unit of blood was collected and preserved.Reactions of the blood donors were observed, and the blood quality was tested.Results The success rate of blood collection was 90% and the qualification rate was 100%.Conclusion Emergency blood collection during a long-distance voyage is feasible,which can help ensure blood supply in peace time or war time.