Priapism and Dialysis

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Abstract
Ninety-three dialysis units located in the tri-state area were surveyed for the prevalence of priapism. Seventeen of 3,337 male patients experienced an episode of priapism. All of these episodes occurred either during or 2–7 h after dialysis, suggesting a cause-and-effect relationship. The use of heparin during dialysis seemed to play a role in its induction; none of the patients on peritoneal dialysis experienced priapism, and heparin was not used in their exchanges. Eleven of 17 patients also received androgen therapy which might have been a contributing factor. Additional considerations included dialysis-induced hypoxemia and acidosis which have been known to precipitate priapism in patients with sickle cell disease or trait. In our study, 2 of 10 patients, including our case report, were black males with sickle cell trait. The calculated prevalence in the male population is 1:196, and in blacks and Caucasians 1:128 and 1:293, respectively. Except for 2 cases of sickle cell trait in the 10 black males, no particular subpopulation at risk was identified. In view of the absence of a proven etiologic agent and the relatively low prevalence of priapism we do not recommend changes in dialysate, anticoagulant, or the use of androgen therapy.

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