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  • Title: [Metaraminol in therapy of various forms of priapism].
    Author: Block T, Sturm W, Ernst G, Staehler G, Schmiedt E.
    Journal: Urologe A; 1988 Jul; 27(4):225-9. PubMed ID: 3140463.
    Abstract:
    A total of 19 patients (aged 17-66 years) with priapism received primarily conservative treatment in the form of aspiration of blood from the cavernous bodies and subsequent intracavernous (i.c.) administration of the alpha-adrenergic drug metaraminol. In 15 patients the priapism was due to i.c. injection of vasoactive agents; 1 patient each it had developed after hemodialysis, during oral prazosin medication, and in conjunction with Fabry's disease; and in 1 patient the etiopathogenesis was unknown. Treatment of priapism with metaraminol was successful in the first 15 patients and in 2 patients with priapism due to hemodialysis and oral prazosin medication. Therapy failed in long-lasting priapism associated with Fabry's disease and in priapism of unknown etiopathogenesis. Penile detumescence took place in the first 15 patients 3 min to 2.5 h after the injection of 2-4 mg metaraminol. Hemodialysis- and prazosin-linked priapism was treated with 5 and 2 mg metaraminol, respectively; in these patients erection subsided within 15 and 4 min after onset of therapy. In a further 2 patients in whom therapy had failed Al-Ghorab shunts were constructed, with the subsequent postoperative complication of erectile impotence. Injection of metaraminol must be carried out under strict supervision of the patient's circulatory system: doses of 4 mg metaraminol or more led to an increase in blood pressure and heart rate. In 15 patients with priapism induced by i.c. application of vasoactive agents, the analysis of blood gas parameters demonstrated a severe hypercapnia (70.3 +/- 10.0 mm Hg) and acidosis (pH 7.08 +/- 0.08) 5-10 h after the onset of erection, but severe hypoxia (37.0 +/- 16.6 mm Hg) was not found until erection had lasted for more than 10 h.(ABSTRACT TRUNCATED AT 250 WORDS)
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