输注静脉全营养混合液滴系数的研究

Study on the drop coefficient of total nutrient admixture fluids infusion

目的:探讨输注静脉全营养混合液(TNA)的滴系数,以便有计划地输注TNA。方法:用一次性输液管模拟静脉输液,测定不同能量密度TNA和蒸馏水的滴系数。A组为卡文配方、B组为医院配制的常用配方、C组(对照)为蒸馏水。在50滴/min流速下测定5 ml的滴数和100滴的毫升数,各50次,计算出每毫升的滴数(滴系数)及20滴的毫升数,并比较其差异。结果:三组间滴系数的比较均存在显著性差异(P<0.01)。C组的滴系数与20滴=(1±0.1)ml的毫升数一致,无统计学差异(P>0.05)。结论:不同液体、不同配方TNA的滴系数不同。临床输注TNA不能按输液管道上标注的滴系数来计算,应重新测定滴系数,才能准确计算出单位时间内输入体内的液体量。

Objective ： To find out the drop coefficient of total nutrient admixture （TNA） for sys- tematic infusion. Methods： Using non-returnable infusion-tube for simulation infusion, the drop coeffi-cients of two different energy density of TNA and distilled water were measured. Calvin nutrient solution, common formula and distilled water （the control group ） were compared. Results： The differences of drop coefficients among 3 groups were significantly different （P 〈 0.01 ）. The drop coefficient of group C was the same as that marked： 20 drops = （1±0.1 ） ml. Conclusion： Different drop coefficients have been found in different formula TNA. TNA＇s infusion can not be calculated according to the the drop coefficient of the marks of infusion tube. We should recount the drop coefficient before using TNA to find out the unit-time infusion volume accurately.