Rezum Water Vapor Therapy in Da Nang Vietnam – Five Year Clinical Outcomes and Patient Guide

For expatriates, retirees, and international patients living in or traveling to Central Vietnam, finding an evidence-based, minimally invasive solution for Benign Prostatic Hyperplasia (BPH) without the risks of major surgery is a top healthcare priority. Rezum Water Vapor Thermal Therapy (developed by Boston Scientific, USA) represents a major clinical advancement in modern urology by utilizing the natural thermal energy stored in sterile water vapor to ablate obstructive prostate tissue in a single 10-minute outpatient session [1, 2].

💡 Quick Clinical Summary:
Rezum water vapor therapy in Da Nang, Vietnam is an FDA-cleared and AUA/NICE-recommended Minimally Invasive Surgical Therapy (MIST) for men over 50 with prostate volumes between 30 mL and 80 mL (including obstructive median lobes) [1, 2]. By delivering 9-second bursts of sterile steam (releasing 540 calories/mL upon condensation) directly into the hyperplastic transition zone, Rezum triggers targeted coagulative necrosis and natural tissue resorption. Pivotal 5-year randomized controlled trial data confirm a 48% reduction in IPSS symptom scores, a 44% improvement in peak urinary flow (Q_max), a 4.4% five-year surgical retreatment rate, and 0% de novo device-related erectile dysfunction [1].

Figure 1: The Boston Scientific Rezum Water Vapor Therapy system delivers targeted convective thermal energy in 9-second treatments with proven 5-year clinical durability [1].

1. Thermodynamic Mechanism – How Convective Water Vapor Ablates Obstructive Prostate Tissue

Conductive heat burns from the outside in. Convective steam disperses uniformly within anatomic boundaries.

Older thermal therapies such as transurethral needle ablation (TUNA) and microwave thermotherapy (TUMT) relied on conductive heat transfer, which created uneven thermal gradients, char formation, and high retreatment rates [1]. By contrast, the Rezum System converts sterile liquid water into vapor at approximately 103°C using a radiofrequency inductive coil heater inside a single-use transurethral delivery device [1, 3].

When injected into the prostatic transition zone for 9 seconds per treatment site, the water vapor flows convectively through the cellular interstices and immediately condenses back into liquid upon contact with cell membranes at body temperature. This phase change releases 540 calories of thermal energy per milliliter of water, causing instantaneous cell membrane denaturation and microvascular thrombosis within a precisely bounded 1.5 to 2.0 cm lesion [1]. Because convective steam follows the path of least resistance and cannot cross the natural collagenous surgical capsule separating the transition zone from the peripheral zone, the external urethral sphincter and neurovascular bundles remain completely protected [1, 3].

2. Five-Year Pivotal Clinical Trial Data (Rezūm II Study, McVary et al.)

Long-term durability is the true benchmark of any minimally invasive prostate procedure.

In the landmark multicenter, randomized, sham-controlled trial published in The Journal of Urology by McVary et al., 197 men with moderate-to-severe lower urinary tract symptoms (LUTS) were followed for 60 months [1]. The clinical outcomes demonstrated sustained improvements across all subjective and objective parameters from 3 months through 5 years:

Figure 2: Sustained 5-year symptom relief and urinary flow improvements following a single Rezum Water Vapor Therapy procedure (McVary et al., Journal of Urology) [1].

3. Why International Patients Choose Da Nang and Dr. Dang Phuoc Dat for Rezum Therapy

Combining American urological technology with personalized international hospital care in Central Vietnam.

At the Department of Surgery – Family Hospital Da Nang (73 Nguyen Huu Tho Street, Hai Chau District, Da Nang), Dr. Dang Phuoc Dat (Bs CKI Đặng Phước Đạt) provides comprehensive English-speaking urological consultations and minimally invasive BPH interventions:

• Genuine Boston Scientific Single-Use Equipment: Every procedure utilizes an original, factory-sealed Rezum Delivery Device imported from Boston Scientific (USA) under strict sterile operating room protocols.
• Comprehensive Pre-Procedure Diagnostic Mapping: Includes uroflowmetry, post-void residual (PVR) bladder scan, Transrectal Ultrasound (TRUS) prostate volumetry, serum PSA screening, and flexible cystoscopy to assess median lobe protrusion [2, 4].
• Painless Outpatient Sedation: Performed in 5 to 10 minutes under light intravenous sedation and targeted prostatic nerve block, allowing patients to return to their home or hotel the same afternoon.

4. Frequently Asked Questions (FAQ)

Question 1: How many steam injections are needed during a Rezum procedure?

The exact number of 9-second water vapor injections depends on the length of the prostatic urethra (measured from the bladder neck to the verumontanum) and whether an enlarged median lobe is present. In the Rezūm II trial, patients received an average of 4.5 to 5.1 total injections, plus 1 to 2 additional injections if an obstructive median lobe was treated [1].

Question 2: Can I stop taking my daily BPH medications (Tamsulosin or Finasteride) after Rezum?

Yes. Over 88% of patients who undergo Rezum remain completely free from BPH medications at 5 years post-procedure [1]. Patients typically continue their alpha-blocker for 2 to 4 weeks after the procedure while initial tissue edema subsides, then discontinue oral medications permanently under physician guidance.

Question 3: How can expats or international visitors book a Rezum consultation in Da Nang?

You can message or call Dr. Dang Phuoc Dat directly via WhatsApp / Zalo / Phone at +84 7777 43 777 to schedule a priority English consultation at Family Hospital Da Nang or the Da Nang Urology & Andrology Center.

5. References (Vancouver Style)

1. McVary KT, Gittelman MC, Goldberg KA, Patel K, Shore ND, Levin RM, et al. Final 5-Year Outcomes of the Multicenter Randomized Sham-Controlled Trial of a Water Vapor Thermal Therapy for Treatment of Moderate to Severe Lower Urinary Tract Symptoms Secondary to Benign Prostatic Hyperplasia. J Urol. 2021;206(3):715-24. doi:10.1097/JU.0000000000001778.
2. Sandhu JS, Bixler BR, Dahm P, Goueli R, Kirkby E, Stoffel JT, et al. Management of Lower Urinary Tract Symptoms Attributed to Benign Prostatic Hyperplasia (BPH): AUA Guideline Amendment 2023. J Urol. 2024;211(1):11-9.
3. National Institute for Health and Care Excellence (NICE). Rezum for treating lower urinary tract symptoms secondary to benign prostatic hyperplasia [MTG49]. London: NICE; 2020.
4. Vietnam Ministry of Health. Clinical Guidelines on Diagnosis and Management of Urological Diseases (Decision 4068/QD-BYT). Hanoi: Medical Publishing House; 2020.

Medical Disclaimer: This clinical article is authored and medically reviewed by Dr. Dang Phuoc Dat, MD, Specialist Level I (Bs CKI Đặng Phước Đạt) based on current international urological guidelines for educational purposes. It does not substitute for an in-person clinical examination, diagnostic imaging, and individualized treatment plan from a qualified urologist.