恒温培养箱加温对不同贮存期红细胞的影响

目的探讨恒温培养箱加温对不同时间贮存红细胞悬液的影响。方法红细胞悬液在恒温培养箱中37℃、44.5℃分别放置30min,观察红细胞形态渐进规律性改变。将室温预热组、37℃加温组、44.5℃加温组的红细胞悬液进行涂片,Wright、Giemse染色后油镜下计数1000个红细胞计算其比值,并对3组RBC、WBC、Plt,测其Hb和K+的改变,详细观察溶血程度和渗透性。结果红细胞形态、WBC、RBC、Plt,Hb和血K+及红细胞的溶血程度,没有随着温度升高而改变,只是随着贮存时间的延长略有升高,Hb室温预热组为(170.8±29.18)g/L,37℃加热组为(170.72±27.9)g/L,44.5℃加温组为(171.08±22.3)g/L(P>0.05)。血清K+3组没有明显差别(P>0.05)。在1%NaCl溶液中,开始溶血与完全溶血室温预热组是(4.5±0.18),(3.6±0.1)g/L,37℃加温组为(4.41±0.38)和(3.42±0.36)g/L,44.5℃加温组为(4.3±0.2)和(3.4±0.1)g/L在室温预热时溶血值已在正常参考范围的最高上限。5种红细胞形态的变化:在14、21、28、35d时光滑球形红细胞的比率3组无显著差异,但是在35d时,随着贮存时间的延长,光滑球形红细胞也略有升高。结论红细胞悬液在温度可控培养箱(44.5℃)中加温30min,红细胞不会产生明显的溶血反应和其它损害。而随着贮存时间的延长,红细胞形态略有改变。

Effect of heating on stored erythrocytes while stationary in an incubator

Objective To observe the effects of elevated temperatures(37~44.5℃)on the cell counts, hemolysis and osmotic fragility of stored red blood cells.Methods After 7~35 days of storage at 4℃, erythrocyte suspensions were heated by incubation at 37℃ and 44.5℃ for 30 min in an incubator and then examined for cell counts, hemolysis and osmotic fragility.Results Red blood cell, white blood cell and platelet counts, hemoglobin and potassium were unchanged following the heat treatment. In the osmotic fragility test, hemolysis remained within normal limits. Hemolysis of groups incubated at 37℃ and 44.5℃ began at (4.41±0.38)g/L and (4.3±0.2)g/L respectively while a complete hemolysis occurred at (3.42±0.36)g/L and (3.4±0.1)g/L , showing no significant difference compared to the room temperature control (4.5±0.18)g/L and (3.6±0.1)g/L. There was no significant distinction in the proportions of smooth spherocyte among the samples incubated at different temperatures, except the samples stored for 35 days, probably due to the long storage period.Conclusions Heating at temperatures between 37～44.5℃ for as long as 30 min does not cause hemolysis or other damage to red blood cells.