Management of Priapism: Results of a Nationwide Survey and Comparison with International Guidelines.

OBJECTIVE: The aim of this study is to evaluate current urologic practice regarding the management of priapism in Turkey and compare with international guidelines. METHODS: Urologists and urology residents were invited to an online survey consisting of 30 multiple-choice questions on priapism-related clinical practices that were consid- ered most important and relevant to practices by using Google Forms. RESULTS: Total number of responses was 340. Respondents reported that they recorded a detailed patient's medical history and physical examination findings (n = 340, 100%) and laboratory testing, which includes corporal blood gas analysis (n=323, 95%). Participants announced that they performed Doppler ultrasound for 1/4 cases (n = 106, 31%), but 22% of the participants (n=75) replied that they performed in >75% of cases. Participants (n=311, 91%) responded that the first-line treatment of ischemic priapism is decompression of the corpus cavernosum. Moreover, most respondents (n = 320, 94%) stated that sympathomimetic injection drugs should be applied as the second step. About three-quarters of respondents (n = 247, 73%) indicated adrenaline as their drug of choice. Phosphodiesterase type 5 inhibitors seems to be the most pre- ferred drug for stuttering priapism (n=141, 41%). Participants (n=284, 84%) replied that corpora-glanular shunts should be preferred as the first. A large number of par- ticipants (n = 239, 70%) declared that magnetic resonance imaging can be performed in cases with delayed (>24 hours) priapism to diagnose corporal necrosis. Most of the participants (84%) responded that penile prosthesis should be preferred to shunts in cases with delayed (>48 hours) priapism. CONCLUSION: It would be appropriate to improve the training offered by professional associations and to give more training time to the management of priapism during residency.

The prevalence and topographic distribution of penile calcification in a large cohort: a retrospective cross-sectional study.

The prevalence of penile calcification in the population remains uncertain. This retrospective multicenter study aimed to determine the prevalence and characteristics of penile calcification in a large cohort of male patients undergoing non-contrast pelvic tomography. A total of 14 545 scans obtained from 19 participating centers between 2016 and 2022 were retrospectively analyzed within a 3-months period. Eligible scans (n = 12 709) were included in the analysis. Patient age, penile imaging status, presence of calcified plaque, and plaque measurements were recorded. Statistical analysis was performed to assess the relationships between calcified plaque, patient age, plaque characteristics, and plaque location. Among the analyzed scans, 767 (6.04%) patients were found to have at least one calcified plaque. Patients with calcified plaque had a significantly higher median age (64 years (IQR 56-72)) compared to those with normal penile evaluation (49 years (IQR 36-60) (p < 0.001). Of the patients with calcified plaque, 46.4% had only one plaque, while 53.6% had multiple plaques. There was a positive correlation between age and the number of plaques (r = 0.31, p < 0.001). The average dimensions of the calcified plaques were as follows: width: 3.9 ± 5 mm, length: 5.3 ± 5.2 mm, height: 3.5 ± 3.2 mm, with an average plaque area of 29 ± 165 mm² and mean plaque volume of 269 ± 3187 mm³. Plaques were predominantly located in the proximal and mid-penile regions (44.1% and 40.5%, respectively), with 77.7% located on the dorsal side of the penis. The hardness level of plaques, assessed by Hounsfield units, median of 362 (IQR 250-487) (range: 100-1400). Patients with multiple plaques had significantly higher Hounsfield unit values compared to those with a single plaque (p = 0.003). Our study revealed that patients with calcified plaques are older and have multiple plaques predominantly located on the dorsal and proximal side of the penis.

Second pathways in the pathophysiology of ischemic priapism and treatment alternatives.

OBJECTIVE: To evaluate the early therapeutic alternatives such as bosentan, an endothelin receptor blocker, theophylline, an adenosin receptor blocker, and a nonselective phosphodiesterase enzyme inhibitor, zinc protoporphyrin (ZnPP), a heme oxygenase 1 inhibitor, for the therapy of ischemic priapism in the rat models. METHODS: Twenty-four Sprague-Dawley rats were randomly divided into 4 equal groups: control group, ZnPP group, bosentan group, and theophylline group. Erection was provided by vacuum constriction method and maintained for 4 hours for achieving the priapism in all groups. The rats in the control group were administered 1 mL/kg saline intraperitoneally (ip). The rats in group 2 were administered 25 mg/kg ZnPP ip. The rats in group 3 were administered 0.25 mg/kg bosentan ip. The rats in group 4 were administered 100 mg/kg theophylline ip. Six rats from each group were decapitated after 6 hours of drug administration. Then endothelin 1, adenosine deaminase, heme oxygenase 1 enzymatic activity, and apoptosis index in the cavernous tissues were estimated. RESULTS: Cavernous tissue endothelin 1, adenosine deaminase, heme oxygenase 1 enzymatic activity levels, and apoptosis index were significantly decreased in bosentan, theophylline, and ZnPP-treated rats compared with the controls. CONCLUSION: Inhibition of priapism induced apoptosis with bosentan, theophylline, and ZnPP seems promising on preserving erectile function.

In vitro examination of effects of hyperprolactinemia and hypoprolactinemia on seminal vesicle contractions.

OBJECTIVE: To investigate the contractile characteristics of the seminal vesicles in rats, in which hyperprolactinemia and hypoprolactinemia was induced by prolactin and bromocriptine administration. MATERIALS AND METHODS: A total of 24 Wistar albino rats were randomly divided into 3 groups: control group, hyperprolactinemia group, and hypoprolactinemia group. The rats in the control group were administered 0.1 mL saline subcutaneously for 21 days. The rats in group 2 received prolactin 51 µg/kg subcutaneously for 21 days. The rats in the third group received intraperitoneal bromocriptine mesylate at a dose of 66 µg/kg. All the rats were decapitated at 21 days. The seminal vesicles were removed using a microsurgical technique, and the tissue sections were prepared (0.5 × 0.2 cm). These sections were suspended in the organ bath. Subsequently, contractions were induced using 10 µmol acetylcholine or 100 mmol potassium chloride. RESULTS: The amplitude values induced by potassium chloride in the prolactin group were significantly greater than those in the bromocriptine group or control group. Similarly, the amplitude values induced by acetylcholine were also significantly greater in the prolactin group than in the other 2 groups. CONCLUSION: Experimental hyperprolactinemia results in an increase in the smooth muscle contraction and tonus of the seminal vesicles. The alterations in the smooth muscle tonus in the seminal vesicles and genitourinary tract might be involved in the etiology of infertility occurring in hyperprolactinemia.