Establishment of a C57BL/6 mouse model simulating transurethral thulium laser vaporization prostatectomy / 中华泌尿外科杂志

Objective:To construct a C57BL/6 mouse model of simulating transurethral thulium laser vaporization prostatectomy.Methods:Twelve male C57BL/6 mice were selected to undergo transvesical vaporization resection of the urothelium covering the urethra of the prostate using thulium laser. The urethral tissue of the prostate was retrieved on the 1st, 3rd, 5th, and 7th days after the surgery. HE staining was used to observe the process of re-epithelialization of the urethral wound of the prostate. Immunohistochemical (IHC) staining was used to detect whether the re-epithelialized cells of the urethral wound of the prostate expressed urothelin Ⅲ (UPⅢ).Results:On the first day after surgery, HE staining showed complete destruction to the urothelium covering the urethra of the prostate, with a large amount of coagulative necrotic tissue on the wound surface, and IHC staining showed no expression of UPⅢ on the wound surface. On the 3rd day after surgery, HE staining showed that there were still no regenerated epithelial cells on the wound surface, with coagulation necrosis tissue significantly reduced, and the urethral cavity was clearly visible. And IHC staining showed no expression of UPⅢ on the wound surface. On the 5th day after surgery, HE staining showed 1-2 layers of regenerated epithelial cells lacking cell polarity on the wound surface, and IHC staining showed that the regenerated epithelial cells expressed UPⅢ. On the 7th day after surgery, HE staining showed 4-6 layers of polar regenerated epithelial cells on the wound surface, and IHC staining showed the multiple layers of regenerated epithelial cells expressing UPⅢ.Conclusions:Based on the simulation of transurethral thulium laser vaporization resection of the prostate, the thulium laser and ultra micro endoscope system were used to vaporize the urothelium covering the urethra of the prostate, and the process of urethral re-epithelialization of the prostate can be observed after surgery. The establishment of the C57BL/6 mouse model simulating thulium laser vaporization prostatectomy provides a new research platform for studying the mechanism of wound repair after prostatectomy.

A case report of severe hematuria after transrectal prostate biopsy treated by repeat interventional embolization / 中华泌尿外科杂志

Hemorrhage after prostate biopsy is common, but hemorrhagic shock is rare. We reported a case of sudden severe hematuria on the third day after prostate biopsy, which was considered to be bleeding at the puncture site. Conservative treatment was ineffective, and interventional embolization was performed. Bilateral bulbar urethral arteries were embolized, and the bleeding was stopped successfully. On the 4th day after embolization, the patient developed hypovolemic shock. Angiography showed bilateral prostatic artery bleeding, and the bleeding site and its superior branch arteries were embolized immediately. At 4 months after embolization, no bleeding related events occurred.