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過去8年間に施行した逆行性腎盂造影のうち,良好な造影状態を示す逆行性腎盂造影像105例を対象とした。腎盂腎逆流は105例中17例(16.2%)に認められた。水腎症を示さない逆行性腎盂造影62例では6例(9.7%)に腎盂腎逆流が認められたのに対して,水腎症を示す逆行性腎盂造影像43例では11例(25.6%)と高率に腎盂腎逆流が認められた(P<0.05)。疾患別には,尿管狭窄例,尿管結石例,萎縮腎例、特発性腎出血例に腎盂腎逆流が高率に認められた。尿管狭窄例,尿管結石例の検討から,腎盂腎逆流は上部尿路通過障害を示唆する所見として意義あるものと考えた。
In a consecutive series of 105 retrograde pyelographies performed in 88 kidneys over a period of 8 years, the overall incidence of pyelorenal backflow was 16. 2%. The occurrence of pyelorenal backflow was significantly higher in retrograde pyelograms with hydronephrotic change (11/43) than without hydronephrotic change (6/62). Pyelorenal backflow was found more frequently in retrograde pyelograms showing ureteral stenosis (4/15) or ureteral stone (3/12) than showing no abnormal finding (0/25).We conclude that the appearance of pyelorenal backflow on retrograde pyelograms may indicate the presence of acute ureteral obstruction.
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