[Urolastic: A new medical liquid silicone rubber elastomer compound for penile augmentation in beagle dogs]

To study the safety, durability and effectiveness of a new medical liquid silicone rubber elastomer (LSRE) compound Urolastic in penile augmentation in beagle dogs.

A total of 30 beagle dogs were included in the experiment. The diameters of the proximal, middle and distal penis of the animals were measured and the indexes of blood routine, liver and kidney function and electrolytes obtained before and at 1 week and 3 months after penile subcutaneous injection of the LSRE compound. CT scanning and pathological examinations of the liver, kidney and penile tissues were performed at 1 and 3 months after treatment.

The diameters of the proximal, middle and distal penis of the dogs were increased by (0.4 ± 0.3) cm, (0.6 ± 0.1) cm and (0.5 ± 0.3) cm at 1 week, and (0.4 ± 0.2) cm, (0.5 ± 0.1) cm and (0.6 ± 0.2) cm at 3 months after injection of the LSRE compound, with statistically significant difference from the baseline (P < 0.01 or P < 0.05) but not between the 1st week and the 3rd month (P > 0.05). The counts of leukocytes and neutrophils were markedly increased compared with the baseline (［18.16 ± 2.57］ vs ［15.16 ± 3.17］ g/L, P < 0.05; ［77.34 ± 9.21］% vs ［67.18 ± 8.25］%, P < 0.05), but not the other blood routine indexes. There were no statistically significant differences in the liver and kidney functions or electrolytes before and after the injection. At 1 and 3 months after treatment, Urolastic was clearly visible and the injection points were irregular in shape at CT imaging. The anatomical findings were consistent with the CT manifestations and showed that the material was easily separated from the surrounding tissues. No significant inflammatory cell infiltration was observed in pathological examinations at 1 and 3 months.

The new medical LSRE compound Urolastic has a good clinical application prospect in penile augmentation for its advantages of significant effectiveness and high safety.