Blood gas analysis on penile samples.

Penile blood gas can aid in the determination of the subtype of priapism to further guide treatment. A pH 7.25, PO2 30, and PCO2 60 indicate low-flow (ischemic) priapism, which needs to be treated immediately by administration of phenylephrine and draining of blood from the penis. High-flow priapism (1, 2) is usually self-limiting. The sequential samples were obtained to determine the effectiveness of the treatment in improving oxygenation within the penis, indicated by increased PO2 (1, 3). Trazodone was likely the cause (4). Author Contributions: All authors confirmed they have contributed to the intellectual content of this paper and have met the following 3 requirements: (a) significant contributions to the conception and design, acquisition of data, or analysis and interpretation of data; (b) drafting or revising the article for intellectual content; and (c) final approval of the published article.