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  • 1
    ISSN: 1432-2013
    Keywords: Kidney ; Tubular Sodium Transport ; Sodium Pump ; Ion Transport ; Perfusion of Kidney ; Niere ; Tubulärer Natrium-Transport ; Natriumpumpe ; Ionentransport ; Nierenperfusion
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Transtubular absorption of Na and Cl, and intracellular ion concentrations were evaluated in toad kidneys perfused with solutions containing K and without K, and in the presence of 1 mM Ouabain and 1 mM Ethacrynic acid. The following values were obtained with 8.5 mM K: Transtubular absorption of Na and Cl∼68% (percent of filtered load); cell content 294 μmole Na, 433 μmole K, 100 μmole Cl/g solids. Lack of K in the perfusate diminished transtubular absorption to ∼25% and the cells gain 244 μmole Na/g solids, and lose an equimolecular quantity of K. The process is reversible upon raising the K concentration in the perfusate. Ouabain inhibits transtubular absorption to ∼6%; the cells lose about 110 μmole K/g solids, but cellular Na is maintained at the control levels. Ethacrynic acid inhibits transtubular absorption to ∼3%; the cells approximately double their Na and Cl content, but their K is maintained at the control levels. These observations cannot be explained exclusively in terms of an effect on the distal tubule. Probably proximal as well as distal tubules are involved. A single Na pump seems insufficient to account for all experimental findings. The existence of two separate pumps is therefore proposed.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    International orthopaedics 12 (1988), S. 75-78 
    ISSN: 1432-5195
    Keywords: Ultrasound ; Congenital disorders ; Hip
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: Résumé L'ultrasonographic a été utilisée parallélement à l'examen clinique pour le diagnostic et la surveillance du traitement de 48 nouveau-nés et nourrissons atteints de malformation congénitale de la hanche. L'ultrasonographie peut montrer la tête fémorale et ses rapports avec le cotyle avant que sa portion calcifiée ne soit radioopapque et prévient ainsi le danger d'irradiation. Cette technique peut également être réalisé chez des nourrissons porteurs d'attelles d'abduction ou de plâtres fenêtrés et vérifie la reposition d'une tête fémorale subluxée. L'ultrasonographie nous paraît être devenue un outil diagnostique et de surveillance de premiére importance chez les nourrissons atteints de malformation congénitale de la hanche, avant et aprés traitement.
    Notes: Summary Ultrasound was used, together with clinical examination, to help in the diagnosis and to evaluate the treatment of 48 babies with congenital disorders of the hip. The femoral head, and its relation to the acetabulum, can be demonstrated before it becomes visible on radiographs. Ionising radiation is avoided. Ultrasound scanning can be used to visualise the repositioning of the femoral head. It is also possible to examine babies on an abduction frame.
    Type of Medium: Electronic Resource
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