Clinical and Experimental Pediatrics

The Korean Pediatric Society (대한소아청소년과학회)
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Influence of histologic chorioamnionitis and funisitis on the level of peripheral blood C-reactive protein at birth in preterm infants

조산아에서 조직학적 융모양막염 및 제대 혈관염이 출생 직후 말초 혈액 C-반응성 단백의 농도에 미치는 영향

  • Kim, Do-Hyun (Department of Pediatrics, Dongguk University Ilsan Hospital) ;
  • Lee, Heun Ji (Department of Pediatrics, Dongguk University Ilsan Hospital) ;
  • Kim, Hee Sup (Department of Pediatrics, Dongguk University Ilsan Hospital) ;
  • Yoo, Byoung Hoon (Department of Pediatrics, College of medicine, Chung Ang University)
  • 김도현 (동국대학교 일산병원 소아과학교실) ;
  • 이흔지 (동국대학교 일산병원 소아과학교실) ;
  • 김희섭 (동국대학교 일산병원 소아과학교실) ;
  • 유병훈 (중앙대학교 의과대학 소아과학교실)
  • Received : 2009.09.14
  • Accepted : 2009.11.02
  • Published : 2010.01.15
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Abstract

Purpose : The objective of this study is to determine the change of C-reactive protein (CRP) levels in the peripheral blood of preterm infants at birth according to the stage of intrauterine inflammation. Methods : A total of 187 infants (<32 weeks of gestation) were divided into a "no histologic chorioamnionitis" [HCAM (-), n=85] group and a "histologic chorioamnionitis" [HCAM (+), n=102] group according to placental pathologic findings. Furthermore, the HCAM (+) group was subdivided into a "funisitis" [F (+), n=49] group and a "no funisitis" [F (-), n=53] group and also into a "funisitis/amnionitis" [FA (+), n=58] group and an "isolated chorio-deciduitis" [FA (-), n=44] group. High-sensitivity CRP levels in the peripheral blood at birth were measured.Results : Peripheral blood CRP levels were significantly higher in the HCAM (+), F (+), F (-), and FA (+) groups than in the HCAM (-) group, but were not significantly different between the FA (-) and HCAM (-) groups. In addition, peripheral blood CRP levels were significantly higher in the F (+) and FA (+) groups than in the F (-) and FA (-) groups, respectively. For identification of amnionitis or funisitis, a cut-off value of 0.02 mg/dL was chosen. Clinical chorioamnionitis, proven early onset sepsis, histologic chorioamnionitis, and funisitis had higher incidences in infants with peripheral blood CRP levels higher than 0.02 mg/dL. Conclusion : The present study shows that peripheral blood CRP levels at birth in preterm infants born before 32 weeks' gestation is significantly increased in amnionitis or funisitis and might reflect the progress of histologic chorioamnionitis.

목 적 : 조산아에서 출생 직후 말초 혈액의 C-반응성 단백(C-reactive protein, CRP) 농도가 자궁 내 염증의 침범 부위 또는 진행 정도에 따라 어떻게 달라지는 지 알아봄으로써 출생 직후 말초 혈액 CRP 측정의 임상적 의의와 유용성에 대해 연구하고자 하였다. 방 법 : 2005년 9월부터 2009년 4월까지 동국대학교 일산병원에서 출생하여 신생아 중환자실에 입원한 재태기간 32주 미만의 조산아 187명을 연구 대상으로 했다. 연구 대상을 'no histologic chorioamnionitis' [HCAM (-), 85명]군과 'histologic chorioamnionitis' [HCAM (+), 102명]군으로, 다시 HCAM (+)군을 'funisitis' [F (+), 49명]군과 'no funisitis' [F (-), 53명]군 및 'funisitis/amnonitis' [FA (+), 58명]군과 'isolated chorio-deciduitis' [FA (-), 44명]군으로 분류하였다. 출생 직후 말초 혈액의 high sensitivity CRP 농도를 측정하여 각 군 간에 비교하였다. 결 과 : HCAM (+)군, F (+)군, F (-)군, FA (+)군의 말초 혈액 CRP 농도는 모두 HCAM (-)군에 비해 높았으나(평균=0.29 vs. 0.06 mg/dL; 0.52 vs. 0.06; 0.07 vs. 0.06 mg/dL; 0.46 vs. 0.06 mg/dL, P<0.05), FA (-)군의 경우는 HCAM (-)군과 유의한 차이가 없었다. 또한, F (+)군과 FA (+)군의 말초 혈액 CRP 농도는 각각 F (-)군 및 FA (-)군보다 높았다 (평균=0.52 vs. 0.07 mg/dL; 0.46 vs. 0.05 mg/dL, P<0.05). HCAM (-)군과 F (+)군, HCAM (-)군과 FA (+)군을 감별하기 위한 경우, 말초 혈액 CRP 농도의 cut-off 값을 0.02 mg/dL으로 정하였을 때 민감도와 특이도는 모두 94% 및 53%였다(P<0.0001). 또한, F (+)군과 F (-)군, FA (+)군과 FA (-)군을 감별하기 위한 경우, 말초 혈액 CRP 농도의 cut-off 값을 0.02 mg/dL으로 정하였을 때 민감도는 각각 79%와 86%, 특이도는 모두 53%였다(P<0.002, P =0.000). 말초 혈액 CRP 농도가 0.02 mg/dL 이상인 경우, 임상적 융모양막염, 확증된 조기 발현 패혈증, 조직학적 융모양막염, 제대 혈관염의 빈도가 높았다. 결 론 : 재태기간 32주 미만의 조산아에서 출생 직후 말초 혈액 CRP 농도는 태반의 염증이 제대 혈관염이나 양막염까지 진행했을 때 유의하게 증가하여 조직학적 융모양막염의 진행 정도를 잘 반영하였고, 제대 혈관염이나 양막염의 감별 진단에 어느 정도 진단적 가치가 있을 것으로 생각된다.

Keywords

Acknowledgement

Supported by : Chung-Ang University

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