Water Vapor Thermal Therapy Versus Ejaculation-Preserving HoLEP for Benign Prostatic Hyperplasia

Benign prostatic hyperplasia is a common cause of male lower urinary tract symptoms. Treatment selection depends on symptom severity, prostate volume, degree of obstruction, comorbidities, patient preference, expected durability, perioperative morbidity, and the patient's wish to preserve sexual and ejaculatory function.

Water Vapor Thermal Therapy, commercially known as Rezum, is a minimally invasive transurethral therapy that uses convective radiofrequency-generated water vapor to ablate obstructing prostatic tissue. It is commonly used for men with moderate-to-severe lower urinary tract symptoms due to benign prostatic hyperplasia and is considered attractive for patients wishing to preserve sexual and ejaculatory function.

Holmium Laser Enucleation of the Prostate is an effective endoscopic anatomical enucleation procedure for benign prostatic obstruction. Conventional HoLEP provides strong de-obstructive efficacy but may be associated with ejaculatory dysfunction. Ejaculation-preserving HoLEP uses technical modifications aiming to preserve antegrade ejaculation while maintaining adequate relief of obstruction.

This study is a prospective, controlled, non-randomized comparative clinical study conducted at the Department of Urology, Beni-Suef University Hospital, Egypt. Sexually active men aged 50 years or older with symptomatic benign prostatic hyperplasia, prostate volume 30-80 mL, International Prostate Symptom Score of 13 or higher, maximum urinary flow rate of 15 mL/s or less, preserved antegrade ejaculation at baseline, and desire to preserve ejaculation will be eligible.

Patients will not be randomly allocated. Each eligible patient will receive standardized counseling about both treatment options, including the mechanism of action, anesthesia, expected urinary improvement, potential effect on ejaculation and erectile function, catheterization duration, hospital stay, possible complications, retreatment risk, and alternative management options. The final treatment decision will be made through shared decision-making between the patient and treating physician.

Patients selecting Water Vapor Thermal Therapy will undergo transurethral convective water vapor treatment using the Rezum system according to standard procedural principles. Vapor injections will be delivered into obstructing prostatic tissue according to prostate configuration and prostatic urethral length. Median lobe treatment will be performed when present and technically suitable. A Foley catheter will be inserted at the end of the procedure.

Patients selecting ejaculation-preserving HoLEP will undergo Holmium Laser Enucleation of the Prostate using a standardized ejaculation-sparing modification. The technique will aim to preserve supramontanal and perimontanal tissue near the verumontanum and preserve bladder-neck fibers when technically feasible, while performing anatomical enucleation of the obstructing adenoma. A standardized operative checklist will document whether the ejaculation-preserving steps were fully, partially, or not successfully achieved.

Baseline assessment will include medical and urological history, sexual history, digital rectal examination, urinalysis, urine culture when indicated, complete blood count, serum creatinine, coagulation profile, serum prostate-specific antigen, pelvi-abdominal ultrasound, transrectal ultrasound assessment of prostate volume, uroflowmetry, post-void residual urine volume, International Prostate Symptom Score, IPSS quality-of-life score, International Index of Erectile Function-5, and Male Sexual Health Questionnaire-Ejaculatory Dysfunction-Short Form.

Participants will be followed at 1, 3, 6, and 12 months after the procedure. Follow-up assessment will include urinary symptoms, quality of life, maximum urinary flow rate, post-void residual urine volume, erectile function, ejaculatory function, antegrade ejaculation status, adverse events, complications, restart of benign prostatic hyperplasia medication, and any retreatment or reintervention.

The primary outcome is the change in the MSHQ-EjD-SF Function domain score from baseline to 12 months. Secondary outcomes include change in MSHQ-EjD-SF Bother score, change in International Index of Erectile Function-5 score, proportion of patients preserving antegrade ejaculation, change in International Prostate Symptom Score, change in IPSS quality-of-life score, change in maximum urinary flow rate, change in post-void residual urine volume, operative time, catheterization duration, hospital stay, hemoglobin drop, postoperative urinary retention, hematuria or clot retention, urinary tract infection, dysuria, urgency or urge urinary incontinence, stress urinary incontinence, urethral stricture, bladder neck contracture, overall complications graded by the Clavien-Dindo classification, restart of benign prostatic hyperplasia medication, and retreatment or reintervention within 12 months.

Because this is a non-randomized comparative study, baseline differences between groups will be assessed. Adjusted analyses using multivariable regression and propensity-score methods may be performed to reduce allocation bias.

• Change in Male Sexual Health Questionnaire-Ejaculatory Dysfunction-Short Form Bother Item Score [Time frame: Baseline and 12 months after the procedure]
• Change in International Index of Erectile Function-5 Score [Time frame: Baseline and 12 months after the procedure]
• Change in International Prostate Symptom Score [Time frame: Baseline, 1 month, 3 months, 6 months, and 12 months after the procedure]
• Change in Maximum Urinary Flow Rate [Time frame: Baseline, 1 month, 3 months, 6 months, and 12 months after the procedure]
• Change in Post-Void Residual Urine Volume [Time frame: Baseline, 1 month, 3 months, 6 months, and 12 months after the procedure]