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  • 2005-2009
  • 1990-1994  (2)
  • Uterus  (1)
  • Ventilated anaesthetised baboon model  (1)
  • 1
    ISSN: 1432-1076
    Schlagwort(e): Anti-Müllerian hormone (AMH) ; Müllerian-inhibiting substance (MIS) ; Intersex ; Male pseudohermaphroditism ; Uterus
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The persistent Müllerian duct syndrome is characterized by the retention of Müllerian derivatives in patients otherwise normally virilized. Clinically, the persistence of uterus and tubes leads either to cryptorchidism or inguinal hernia, depending on whether or not the Müllerian derivatives can be mobilized during testicular descent. The condition is usually discovered at surgery, however preoperative sonography could allow the diagnosis to be made preoperatively. The molecular basis of the persistent Müllerian duct syndrome is heterogeneous, and is reflected by wide variations in the serum concentration of anti-Müllerian hormone. Some cases are apparently due to end-organ resistance, and are associated with normal serum levels of the hormone. Others, characterized by absent or low hormone concentrations, can be explained by mutations of the gene coding for anti-Müllerian hormone, which are distributed along the whole length of the coding region.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 2
    ISSN: 1619-7089
    Schlagwort(e): Ventilated anaesthetised baboon model ; Technetium-99m hexamethylpropylene amine oxime single-photon emission tomography ; Drug-induced cerebral blood flow changes ; Lidocaine
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Notizen: Abstract The baboon under general anaesthesia as a model to assess drug-induced cerebral blood flow changes (Δ CBF) using single-photon emission tomography (SPET) offers great in vivo possibilities but has to comply with demands on control of anaesthesia-related influencing factors, such as P aCO2 changes. The model sought in this study and described here allows control of P aCO2, in the baboon under thiopentone anaesthesia by ventilation, and was evaluated for the functional dependence of Δ CBF vs Δ P aCO2, using SPET technetium-99m hexamethylpropylene amine oxime (HMPAO) and the split-dose method together with controlled ventilation. During the experiment the model was validated for normal reactivity to P aCO2 changes, and subsequently applied to investigate the mechanisms (still uncertain) of CBF increase known to follow administration of the local anaesthetic lidocaine. Six baboons received 6 mg/kg lidocaine intravenously. CBF was measured between two consecutive SPET acquisitions (split-dose method) respectively relating to HM-PAO distributions in the brain before and after the injection of lidocaine. Meanwhile the animals were maintained at constant respiratory rate and volume. The results indicate that the correlation between Δ CBF and the ensuing fall in PaCO2 deviated from the baseline pattern from the model and confirmed a cerebrovascular contribution to the lidocaine-induced CBF increase. This agreed well with mean and systolic blood pressure changes and heart rate.
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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