Hydro-Jet Dissection of the Cavernous Nerves Preserves Erection Function in a Radical Prostatectomy Animal Model

Area of Science:

• Urology
• Surgical Technology
• Erectile Dysfunction Research

Background:

• Postoperative erectile dysfunction (ED) is a common complication following radical prostatectomy (RP).
• Current surgical techniques for cavernous nerve (CN) dissection during RP can lead to ED.
• Water-jet dissection is a novel technology with potential applications in urologic surgery.

Purpose of the Study:

• To evaluate the impact of hydro-jet dissection (HJD) of the cavernous nerves (CN) on erectile function in an animal model.
• To compare HJD with traditional CN injury methods following a simulated radical prostatectomy.

Main Methods:

• Thirty-two male Sprague-Dawley rats were divided into four groups: sham surgery, bilateral HJD of CN, blunt CN injury, and stretch CN injury.
• Erectile function was assessed after 4 weeks by measuring intracavernous pressure (ICP) and calculating the area under the curve.
• Penile tissues were analyzed using immunohistology for markers of smooth muscle and nerve function (α-smooth muscle actin and neuronal nitric oxide synthase).

Main Results:

• Rats undergoing HJD demonstrated significantly higher peak ICP and area under the curve compared to both CN injury groups (P = .001).
• Erectile function in the HJD group returned to baseline levels.
• Preservation of α-smooth muscle actin and neuronal nitric oxide synthase was noted in the HJD group, unlike in the other surgical trauma groups.

Conclusions:

• Hydro-jet dissection of the cavernous nerves in a radical prostatectomy animal model preserves postoperative erectile function.
• HJD shows potential as a nerve-sparing technique during RP, offering improved erectile function compared to conventional injury methods.
• Further clinical studies are warranted to investigate the efficacy of HJD in human patients undergoing radical prostatectomy.