GreenLight laser treatment, also called photoselective vaporization of the prostate (PVP), is an endoscopic procedure used to relieve urinary obstruction associated with BPH and benign prostate enlargement. A 532-nanometre green laser converts selected obstructing prostate tissue into vapor while simultaneously coagulating small blood vessels, creating a wider urinary channel through the prostate.
01. GreenLight Laser: Indications, Technique and Treatment Role
What problem is GreenLight Laser intended to treat or evaluate?
GreenLight PVP is intended to relieve bladder-outlet obstruction caused by enlarged benign prostate tissue.
The prostate lies below the bladder and surrounds the first portion of the urinary channel. That section is the prostatic urethra. When prostate tissue grows inward around this channel, resistance to urinary flow can increase.
This anatomical relationship is part of the wider prostate health and prostate anatomy pathway.
Prostate-related obstruction may contribute to:
- a weak urinary stream;
- hesitancy;
- intermittent urine flow;
- straining;
- incomplete bladder emptying;
- increasing post-void residual urine;
- recurrent urinary retention;
- and other bothersome lower urinary tract symptoms.
GreenLight PVP removes part of this obstructing tissue by vaporization rather than mechanically cutting tissue into chips.
What happens before and during GreenLight Laser?
Before PVP, the urologist evaluates urinary symptoms, prostate anatomy, gland volume, bladder emptying, medical conditions and previous treatment.
Prostate size is relevant because current guideline recommendations are strongest for glands around 30–80 mL. FBU explains how this is assessed in How Is Prostate Volume Measured?
Assessment may also include urinalysis, symptom scoring, urinary-flow testing, post-void residual measurement, PSA when clinically appropriate and cystoscopy or other testing when anatomy needs clarification.
If a prominent median lobe is present, its anatomy can influence surgical planning. See median lobe prostate enlargement for the anatomical relationship between middle-lobe growth and the bladder outlet.
GreenLight PVP is performed through the urethra without an abdominal incision. A cystoscope is advanced to the prostate and a laser fiber is positioned inside the prostatic urethra.
For the broader treatment pathway, see BPH Surgery and Minimally Invasive Procedures.
02. How Is GreenLight Laser Performed?
Which anatomy, prostate size or disease factors affect GreenLight Laser?
Modern GreenLight systems produce laser energy at a wavelength of 532 nanometres.
This wavelength is strongly absorbed by hemoglobin within prostate tissue. As laser energy is absorbed, tissue temperature rises rapidly and intracellular water is converted to vapor.
The target tissue is progressively vaporized while nearby small blood vessels are coagulated, giving PVP its characteristic hemostatic effect.
Current GreenLight platforms include higher-powered systems such as the 180W XPS platform. Older randomized evidence also includes 80W KTP and 120W LBO systems.
EAU guidance recommends 80W KTP, 120W LBO or 180W LBO PVP as alternatives to TURP for moderate-to-severe urinary symptoms caused by benign prostatic obstruction with prostate volume around 30–80 mL.
PVP has also been used in larger prostates, but treatment can require more operative time and energy as gland volume increases, and evidence is less uniform than for the conventional 30–80 mL range.
What are the main expected outcomes after GreenLight Laser?
Successful PVP can substantially improve urinary symptom scores, maximum urinary flow and residual urine when prostate-related obstruction is responsible for the patient’s urinary problem.
Randomized evidence comparing the 180W GreenLight XPS system with TURP demonstrated non-inferior improvement in symptom score and maximum urinary flow, with comparable outcomes maintained through two years.
Meta-analyses of earlier 80W and 120W GreenLight systems have likewise found urinary symptom and flow outcomes broadly comparable with TURP during short- and mid-term follow-up.
| Outcome | GreenLight PVP | Clinical interpretation |
|---|---|---|
| Urinary symptoms | Substantial improvement is expected in appropriately selected patients. | 180W randomized evidence shows efficacy comparable with TURP through two years. |
| Maximum urinary flow | Usually increases after obstruction is relieved. | Comparable with TURP in major randomized 180W evidence. |
| Residual urine | Often decreases when obstruction is the dominant cause of incomplete emptying. | Persistent high residual may reflect bladder dysfunction or recurrent obstruction. |
| Bleeding | Generally favorable perioperative hemostatic profile. | One of the important reasons PVP may be considered in selected higher-bleeding-risk patients. |
| Catheterization | Often shorter than after conventional TURP in comparative studies. | Individual duration still depends on bleeding, swelling and ability to void. |
| Durability | Can remain effective for years. | Some datasets show more long-term reoperation than TURP; durability varies by laser generation, technique and gland size. |
03. GreenLight Laser: Outcomes, Recovery and Procedure-Specific Trade-Offs
What does recovery after GreenLight Laser usually involve?
A urinary catheter is commonly placed after PVP, although the duration may be relatively short in uncomplicated cases.
Comparative analyses summarized by the EAU have found shorter catheterization and hospital stay after GreenLight PVP than after TURP.
Some appropriately selected patients can undergo PVP with short-stay or outpatient pathways, but same-day discharge is not guaranteed.
Early recovery may include:
- blood or pink discoloration in the urine;
- burning during urination;
- urinary urgency;
- increased frequency;
- temporary difficulty emptying the bladder;
- pelvic or urethral discomfort;
- and occasional passage of small tissue debris during healing.
Bleeding risk is still not zero.
EAU guidance states that GreenLight vaporization appears usable in selected men receiving antiplatelet or anticoagulant therapy, particularly with prostate volumes below 80 mL, but the strength of this evidence is limited for the 180W platform.
Patients should therefore never alter anticoagulant or antiplatelet medication on their own. Perioperative medication management must be individualized by the treating clinicians.
Which urinary or sexual effects should be discussed before GreenLight Laser?
Potential complications include temporary urinary retention, urinary tract infection, bleeding, urethral stricture, bladder-neck contracture, persistent urinary symptoms, urinary incontinence and later need for another BPH procedure.
GreenLight PVP should not be described as an ejaculation-preserving procedure in the same sense as UroLift or some other minimally invasive approaches.
Meta-analysis summarized by the EAU found no significant difference in retrograde-ejaculation rates between GreenLight PVP and TURP.
Similarly, available comparative studies have generally not demonstrated a clear overall erectile-function advantage over TURP.
A man may therefore retain erectile function while experiencing a substantial change in ejaculation. Erection, orgasm and ejaculation are separate outcomes and should be discussed separately before treatment.
04. Who Is Most Likely to Be Considered for GreenLight Laser?
How does GreenLight Laser compare with the closest alternative?
The most established direct comparison is with TURP because both procedures remove obstructing tissue through the urethra.
The preceding treatment in the FBU procedure pathway, Aquablation for BPH, also removes tissue during the procedure but uses an image-guided high-velocity waterjet rather than laser energy.
HoLEP uses another laser-based approach but enucleates the adenoma along a surgical plane rather than progressively vaporizing its surface.
| Feature | GreenLight PVP | TURP | HoLEP |
|---|---|---|---|
| Tissue-removal method | 532-nm laser progressively vaporizes tissue. | Electrosurgical loop resects tissue into chips. | Laser enucleates adenoma along the surgical plane. |
| 30–80 mL prostates | Strong guideline-supported alternative to TURP. | Established standard option. | Established effective option. |
| Hemostasis | Important strength of the technique. | Bleeding profile depends on monopolar/bipolar technique and patient factors. | Generally favorable laser-enucleation bleeding profile. |
| Catheter / hospital stay | Often shorter than TURP. | Usually longer in comparative PVP studies. | Often short in experienced centers. |
| Large prostates | Can be performed, but operating time, energy requirements and retreatment considerations become important. | Less favored as gland size becomes substantially larger. | Well suited to a broad range of gland sizes, including large prostates. |
| Histology specimen | Usually no substantial tissue specimen after standard vaporization. | Resected tissue can be examined pathologically. | Enucleated tissue can be examined pathologically. |
| Ejaculation | Can be significantly altered. | Frequently altered. | Frequently altered after standard HoLEP. |
| Retreatment | Durable, but some long-term datasets show higher reoperation than TURP or HoLEP. | Strong long-term durability. | Strong long-term durability. |
When is GreenLight Laser unsuitable or followed by additional evaluation?
GreenLight PVP may not be the preferred procedure when urinary symptoms are not primarily caused by prostate-related outlet obstruction, when prostate anatomy favors another operation, when a very large gland is better suited to enucleation or simple prostatectomy, or when obtaining prostate tissue for histopathology is clinically important.
Prostate volume alone should not determine the decision. FBU explains why in Does Prostate Size Predict BPH Symptoms?
Similarly, a weak stream, urinary retention or a high post-void residual does not prove that enlarged prostate tissue is the only problem. Weak bladder contraction and urethral disease can produce similar findings.
The complete evaluation pathway is covered in How BPH Is Diagnosed, while the wider disease context is explained in BPH and Enlarged Prostate.
Additional evaluation is especially important when PSA findings, digital rectal examination or imaging raise concern for disease other than uncomplicated benign enlargement, because routine PVP does not provide the same tissue specimen as a resection or enucleation procedure.
Summary
- GreenLight treatment is also called photoselective vaporization of the prostate, or PVP.
- It uses 532-nm laser energy to vaporize obstructing benign prostate tissue through the urethra.
- The wavelength interacts strongly with hemoglobin-containing tissue, allowing tissue vaporization and coagulation during the same procedure.
- GreenLight PVP can substantially improve urinary symptoms, maximum urinary flow and bladder emptying when benign prostatic obstruction is the main problem.
- Current EAU guidance strongly supports 80W, 120W and 180W GreenLight PVP as TURP alternatives for moderate-to-severe LUTS/BPO in prostates around 30–80 mL.
- The 180W GreenLight XPS system demonstrated urinary efficacy comparable with TURP in randomized trial evidence through two years.
- PVP generally has favorable perioperative bleeding, catheterization and hospital-stay characteristics compared with TURP.
- Bleeding can still occur, and anticoagulant or antiplatelet management must be individualized.
- Retrograde or reduced ejaculation can occur and should not be confused with erectile dysfunction.
- Standard PVP usually does not provide a meaningful prostate-tissue specimen for histopathology.
- Long-term retreatment risk, prostate size and alternative procedures should be considered during treatment selection.
- No BPH procedure is universally best; the appropriate option depends on anatomy, obstruction severity, bladder function, medical risk and patient priorities.
Educational disclaimer: This article provides general medical education and does not recommend GreenLight PVP or another BPH procedure for an individual. Treatment selection requires evaluation of urinary symptoms, prostate anatomy, prostate volume, bladder function, bleeding risk, medical conditions and patient priorities by an appropriately qualified clinician.
Explore the Prostate and BPH Pathway
To understand the anatomy involved in GreenLight PVP, start with Prostate Health, Prostate Anatomy and Function, and the Prostatic Urethra.
For prostate-size interpretation, see How Prostate Volume Is Measured.
For disease and procedure context, continue through BPH and Enlarged Prostate and BPH Surgery and Minimally Invasive Procedures.
The preceding treatment in this procedure sequence is Aquablation for BPH.
Evidence Sources
- European Association of Urology. Management of Non-neurogenic Male LUTS: 532 nm GreenLight Laser Vaporisation of the Prostate.
- Thomas JA, et al. GreenLight-XPS Laser Vaporization vs TURP: Two-Year Outcomes of the GOLIATH Randomized Trial. European Urology.
- Ajib K, et al. Photoselective Vaporization With the 180-W XPS GreenLight Laser: Five-Year Safety and Functional Outcomes.
- U.S. Food and Drug Administration. GreenLight XPS Laser System — 510(k) K092735.
