Study of changes of free carnitine in premature newborns with hyaline membrane disease / 重庆医学

ABSTRACT

Objective To study the serum free carnitine level and change trend in premature infantwith hyaline membrane disease (HMD) within postnatal 7 d .MethodTotally 63 preterm newbornwith gestational age of 28-32 weekin the NICU of thihospital were selected ,among them 32 caseof HMD were taken athe observation group and othe31 preterm newbornwithouHMD athe control group .The free carnitine level wameasured within 6 h aftebirth ,on 3 ,7 d by using the tandem masspectrum method .ResultThe free carnitine level within 6 h aftebirth had no statistical difference between the observation group and the control group[(23 .57 ± 7 .45)μmol/L v.(24 .34 ± 5 .73)μmol/L ,t=0 .48 ,P=0 .630] ,the free carnitine level on 3 d in the observation group wasignificantly lowethan thain the control group [(19 .21 ± 6 .83)μmol/L v.(23 .74 ± 7 .13)μmol/L ,t=2 .57 ,P=0 .010];the free carnitine level on 7 d in the observation group waalso significantly lowethan thain the control group [(16 .62 ± 7 .95)μmol/L v.(22 .83 ± 6 .56)μmol/L ,t=3 .39 ,P=0 .001] .The free carnitine level aftebirth in the control group remained stable ,which a3 time pointof 6h ,3 ,7 d had no statistical difference(F=0 .42 ,P=0 .660);whereathe free carnitine level wagradually decreased aftebirth ,which a3 time pointof 6 h ,3 ,7 had statistical difference(F=7 .13 ,P=0 .001) .Conclu-sion The free carnitine level aftebirth in preterm newbornwith HMD igradually decreased ,which needmore carnitine fopromoting the generation of pulmonary surfactan.