Document Detail

Early fetal obstructive uropathy produces Potter's syndrome in the lamb.
MedLine Citation:
PMID:  11083420     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: If creating an obstructive uropathy early in glomerulogenesis produces MCDK (Multicystic Dysplastic Kidney), then a very early obstruction may produce Potter's Syndrome (PS) with oligohydramnios. METHODS: Fetal lambs at 50 days' gestation underwent urethral and urachal ligation using fine SILASTIC (Dow Corning, Midland, MI) tubing and were delivered by cesarean section at 145 days' gestation. At the time of death, kidney weight, length, and lung volumes were measured. These samples were examined histologically. Urinary sodium, chloride, potassium, and osmolarity also were measured. These were compared with normal-term fetuses. RESULTS: One ewe miscarried. Two of 3 of 50-day obstructive uropathy lambs survived. The 2 survivors had dysplastic kidneys. One with large gastroschisis did not have PS but the other had renal, pulmonary, and chest wall hypoplasia. Both male lambs had undescended testes with a large bladder. Kidney weights were 2 g in the PS lamb and 16 g in controls. Lung volume was 84 mL in the PS lamb and 340 mL in controls. The lamb's face was compressed and the fetus was hydropic. Urine sodium, potassium, and osmolarity levels were higher than that of controls. CONCLUSIONS: This is the first successful model ligating the penile urethra and urachus in a 50-day lamb. The authors' previous 60-day model did not have PS, but an earlier obstructive uropathy caused MCDK with PS.
H Kitagawa; K C Pringle; J Zucollo; J Koike; K Nakada; H Moriya; Y Seki
Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Journal of pediatric surgery     Volume:  35     ISSN:  0022-3468     ISO Abbreviation:  J. Pediatr. Surg.     Publication Date:  2000 Nov 
Date Detail:
Created Date:  2001-12-07     Completed Date:  2002-01-15     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  0052631     Medline TA:  J Pediatr Surg     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1549-53     Citation Subset:  IM    
Department of Pathology, St Marianna University School of Medicine, Kawasaki, Japan.
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MeSH Terms
Abnormalities, Multiple / etiology*
Disease Models, Animal
Face / abnormalities*
Fetal Diseases / embryology*
Gestational Age
Kidney / pathology*
Lung / pathology*
Nose / abnormalities*
Oligohydramnios / diagnosis,  etiology*
Organ Size
Pregnancy, Animal
Reference Values
Risk Assessment
Ureteral Obstruction / complications*,  diagnosis,  embryology

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