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Journal of the Korean Society of Pediatric Nephrology 2005;9(1): 15-20.
무증상 혈뇨 또는 단백뇨 소아의 좌신정맥 혈류 속도
이영준, 황유식, 김명준, 이재승
1연세대학교 의과대학 소아과학교실, 신장질환 연구소
2연세대학교 의과대학 소아과학교실, 신장질환 연구소
3연세대학교 의과대학 진단방사선과학교실
4연세대학교 의과대학 소아과학교실, 신장질환 연구소
Flow Velocity of Left Renal Vein in Children with Asymptomatic Hematuria or Proteinuria
Young-Jun Rhie, You-Sik Hwang, Myung-Joon Kim, Jae-Seung Lee
1Department of Pediatrics, The institute of Kidney Disease, Yonsei University, College of Medicine
2Department of Pediatrics, The institute of Kidney Disease, Yonsei University, College of Medicine
3Department of Diagnostic Radiology, Yonsei University, College of Medicine
4Department of Pediatrics, The institute of Kidney Disease, Yonsei University, College of Medicine
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ABSTRACT
Purpose : Nutcracker syndrome must be considered when hematuria or proteinuria occurs in a healthy child. The purpose of this study is to investigate the prevalence of nutcracker syndrome among children with asymptomatic hematuria or proteinuria, and to obtain the ratios of the peak velocity of the left renal vein between the aortomesenteric portion and the hilar portion in children with asymptomatic hematuna or protelnuria in which nutcracker syndrome was excluded and to observe whether the ratios are affected by sex, age or urinalysis findings.
Methods : Using Doppler ultrasonography, we measured the flow velocity and obtained the peak velocity ratios of the left renal vein at the aortornesenteric portion and at the hilar Portion of the left kidney in children with asymptomatic hematuria or proteinuria who visited the Division of Pediatric Nephrology, Severance Hospital from May 2001 to March 2004.
Results : Of 304 children with asymptomatic hematuna or proteinuria, 107 children(35.2%) were diagnosed with nutcracker syndrome. For 197 children with asymptomatic hematuria or proteinuria excluding nutcracker syndrome, the mean ratio of the peak velocity was 2.54 $pm$0.73, which was not affected by sex, age or urinalysis findings.
Conclusion : Nutcracker syndrome was the major cause of asymptomatic hematuria or proteinurla In children, comprising 35% of all cases. Doppler ultrasonography was helpful in the screening of nutcracker syndrome and prevention of its complications. For children with asymptomatic hematuria or proteinuria excluding nutcracker syndrome, the peak velocity ratio of the left renal vein did not differ from that of normal children and was not affected by sex, age or urinalysis findings.
Key words: Nutcracker syndrome | Doppler ultrasonography | Asymptomatic hematuria | Peak flow velocity | Left renal vein
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