Photoselective Vaporization of Prostate: Five-year Outcomes of Entire Clinic Patient Population

Reoperation after surgical treatment for benign prostatic hyperplasia: a systematic review

Context

Surgical treatment is important for male lower urinary tract symptom (LUTS) management, but there are few reviews of the risks of reoperation.

Objective

To systematically evaluate the current evidence regarding the reoperation rates of surgical treatment for LUTS in accordance with current recommendations and guidelines.

Evidence acquisition

Eligible studies published up to July 2023, were searched for in the PubMed® (National Library of Medicine, Bethesda, MD, USA), Embase® (Elsevier, Amsterdam, the Netherlands), and Web of Science™ (Clarivate™, Philadelphia, PA, USA) databases. STATA® (StataCorp LP, College Station, TX, USA) software was used to conduct the meta-analysis. Random-effects models were used to calculate the pooled incidences (PIs) of reoperation and the 95% confidence intervals (CIs).

Evidence synthesis

A total of 119 studies with 130,106 patients were included. The reoperation rate of transurethral resection of the prostate (TURP) at 1, 2, 3, and 5 years was 4.0%, 5.0%, 6.0%, and 7.7%, respectively. The reoperation rate of plasma kinetic loop resection of the prostate (PKRP) at 1, 2, 3, and 5 years was 3.5%, 3.6%, 5.7%, and 6.6%, respectively. The reoperation rate of holmium laser enucleation of the prostate (HoLEP) at 1, 2, 3, and 5 years was 2.4%, 3.3%, 5.4%, and 6.6%, respectively. The reoperation rate of photoselective vaporization of the prostate (PVP) at 1, 2, 3, and 5 years was 3.3%, 4.1%, 6.7%, and 7.1%, respectively. The reoperation rate of surgery with AquaBeam® at 1, 2, 3, and 5 years was 2.6%, 3.1%, 3.0%, and 4.1%, respectively. The reoperation rate of prostatic artery embolization (PAE) at 1, 2, 3, and 5 years was 12.2%, 20.0%, 26.4%, and 23.8%, respectively. The reoperation rate of transurethral microwave thermotherapy (TUMT) at 1, 2, 3, and 5 years was 9.9%, 19.9%, 23.3%, and 31.2%, respectively. The reoperation rate of transurethral incision of the prostate (TUIP) at 5 years was 13.4%. The reoperation rate of open prostatectomy (OP) at 1 and 5 years was 1.3% and 4.4%, respectively. The reoperation rate of thulium laser enucleation of the prostate (ThuLEP) at 1, 2, and 5 years was 3.7%, 7.7%, and 8.4%, respectively.

Conclusion

Our results summarized the reoperation rates of 10 surgical procedures over follow-up durations of 1, 2, 3, and 5 years, which could provide reference for urologists and LUTS patients.

Systematic review registration

https://www.crd.york.ac.uk/PROSPERO, identifier CRD42023445780.

Safety, efficacy and functional outcomes of photoselective vaporisation of the prostate: A single-centre experience

Objective:

The objective of this study was to report the safety, efficacy and functional outcomes following photoselective vaporisation of prostate (PVP) with GreenLight laser for benign prostatic enlargement (BPE).

Material and methods:

We retrospectively analysed men who underwent PVP from April 2011 to August 2019 for BPE. Preoperative, intraoperative and postoperative details were retrieved from electronic data software. The perioperative and functional outcomes were analysed.

Results:

A total of 147 patients, with a mean age of 65.4 years, underwent PVP (51 patients – high performance system (HPS), 120 Watts; 96 patients – xcelerated performance system (XPS), 180 Watts). In 20 (13.6%) patients, antiplatelet or anticoagulant were continued in the perioperative period. The mean operative time, lasing time, catheterization time and hospital stay were 54.4 minutes, 38.0 minutes, 48.7 hours and 2.73 days, respectively. Postoperatively, all the functional outcomes IPSS (international prostate symptom score), QOL (quality of life), Qmax (maximum flow rate) and PVR (postvoid residue) were significantly improved from the baseline. The most common complication was dysuria (36.7%). There was no significant perioperative bleeding complications in high-risk men who were on antiplatelet or anticoagulant therapy.

Conclusion:

PVP is a safe, efficacious and durable surgical option in BPE including patients on antiplatelet or anticoagulant therapy.

Level of evidence:

Level 4

GreenLight HPS laser 120 W vs diode laser 300 W vaporization of the prostate for the treatment of benign prostatic hyperplasia in Japanese patients: A prospective, single-center, randomized clinical trial

OBJECTIVES

This study aimed to compare the safety and efficacy of laser vaporization with 532 nm GreenLight High Performance System (HPS) laser 120 W (PVP) and 980 nm diode laser 300 W (CVP) for the treatment of benign prostatic hyperplasia (BPH) in a prospective, single-center, randomized clinical trial.

METHODS

A total of 153 consecutive patients with symptomatic BPH were included; 79 patients were treated with PVP and 74 with CVP. Patients were assessed preoperatively and at 3, 6, and 12 months postoperatively using the International Prostate Symptom Score, quality of life index, peak urinary flow rate, and postvoid residual urine volume. All perioperative and postoperative complications were noted.

RESULTS

There were significant and comparable improvements in each of the outcome variables over a follow-up period of 12 months in both groups. The mean operation/vaporization duration (minutes) was comparable at 74/38 (PVP) and 76/34 (CVP), whereas the mean applied laser energy was significantly higher with CVP than with PVP at 260 vs 195 (kJ), respectively. The mean vaporization rate (mL/min) was not significantly different between the two groups (0.53 PVP vs 0.56 CVP). Immediately after surgery, the rate of recatheterization for urinary retention was significantly higher with CVP than with PVP (17.6% vs 6.8%; P < 0.05).

CONCLUSIONS

Both laser systems provided comparable improvement in the subjective and objective parameters with excellent hemostatic properties. Although our results suggest that both procedures are useful treatment choices, further follow-up is needed to draw definitive conclusions regarding the most ideal laser for treating patients with symptomatic BPH.

Comparative Effectiveness of Transurethral Prostate Procedures at Enabling Urologic Medication Discontinuation: A Retrospective Analysis

OBJECTIVE

To test the hypothesis that transurethral prostate procedures (TUPPs) eliminating tissue result in greater medication discontinuation and lower de novo initiation rates than procedures inducing tissue necrosis.

METHODS

Retrospective review of all men undergoing first time TUPPs at a large tertiary center from 2001 to 2016 was completed. Procedure type and urologic medication use before, 3-12 months after, and greater than 12 months after TUPP were analyzed with simple open prostatectomy as a comparator. Tissue-eliminating TUPPs included transurethral resection of the prostate and laser prostatectomy. Tissue-necrosing procedures included microwave therapy (transurethral microwave therapy) and radiofrequency ablation (transurethral needle ablation), which were grouped in analyses. Medication types were 5-alpha reductase inhibitors (5ARI), alpha blockers, anticholinergics, and beta-3 agonists (B3A).

RESULTS

A total 5150 TUPPs were analyzed. Preoperative medication use significantly varied across TUPPs for 5ARI (P <.01), alpha-blockers (P .01), and anticholinergics (P .047), but not B3A (P .476). Transurethral resection of the prostate and laser prostatectomy were associated with significantly higher medication discontinuation rates and lower resumption and initiation rates compared to tissue-necrosing procedures. Relative to TUPPs, simple prostatectomy had significantly higher medication discontinuation, as well as the lowest resumption and initiation rates.

CONCLUSION

Tissue-eliminating benign prostatic hyperplasia procedures were associated with better medication discontinuation, resumption, and de novo initiation rates compared to tissue-necrosing benign prostatic hyperplasia procedures.

GreenLight Laser for benign prostatic hyperplasia

PURPOSE OF REVIEW

GreenLight photoselective vaporization (GL-PV) is now established in the treatment of benign prostatic enlargement. The present review outlines the available technical armamentarium and summarizes the current best evidence on functional and safety outcomes. Moreover, future technical developments and refinements are presented.

RECENT FINDINGS

GL-PV has evolved to be the most commonly performed procedure, second to conventional transurethral resection of the prostate (TURP) for surgical management of benign prostatic obstruction (BPO). On the basis of the data published in the randomized controlled Goliath study, GL-PV with 180-W technology is noninferior in terms of functional outcomes compared with TURP considering short and intermediate follow-up with a complication-free rate of around 80% after 24 months.The ongoing push towards high-power lasers can be explained by their more effective tissue ablative effect, leading to shorter operating times. Comparative analysis between high-power and low-power laser systems demonstrated similar retreatment rates and most institutions are, therefore, now performing 180-W GL-PV.Performed as an outpatient procedure, GL-PV is cost-effective with a low hospital re-admission rate. Plasma kinetic vaporization of the prostate (PKVP) has recently emerged as a potential contender in the field; also GreenLight enucleation of the prostate (GreenLEP) might be even more effective than GL-PV.

SUMMARY

GL-PV appears to be a well tolerated surgical alternative for patients suffering from BPO. Long-term follow-up data from 120-W and 180-W laser systems are still pending. Potential competitors have recently been brought to the market and further trials and long-term data will show, whether GL-PV will stand the test of time. Regardless of technical specifications, surgeon's experience remains essential to achieve good functional and safety outcomes.

Application of 180W XPS GreenLight laser vaporization of the prostate for treatment of benign prostatic hyperplasia

PURPOSE

To evaluate safety, efficacy and clinical outcomes after photovaporization of the prostate with the 180W-XPS Greenlight laser in patients with low urinary tracts symptom secondary to benign prostatic hyperplasia (BPH).

MATERIALS AND METHODS

All 102 patients with lower urinary tract symptoms who underwent 180W XPS laser vaporization of the prostate from April 2017 to April 2018 were enrolled. The preoperative parameters, postoperative functional, uroflowmetry outcomes and complications were collected.

RESULTS

All patients were successfully treated with 180W XPS laser vaporization. Mean preoperative prostate volume was 81±28.7 ml and mean laser time was 28.2±12.5 minutes. No major complications intraoperatively or postoperatively were observed and no blood transfusions were required. Comparing to preoperative characteristics, International Prostate Symptom Score (IPSS), maximum flow rate (Qmax) and post-void residual (PVR) parameters were improved significantly and sustained during the follow-up period. At 3, 6 and 12-month follow-ups, mean urinary peak flow increased from 6.2±2.1 ml per second to 19.8±4.6, 19.4±4.7 and 19.6±4.9 ml per second, respectively. Mean International Prostate Symptom Scores decreased over time, from 28.9±4.5 to 8.2±1.6, 6.2±1.22 and 5.88±1.15 at 3, 6, 12 months, respectively.

CONCLUSIONS

180W XPS Greenlight laser vaporization is a safe and effective treatment option for patients with lower urinary tract symptoms secondary to BPH.

80-W GreenLight Laser Vaporization Versus Transurethral Resection of the Prostate for Treatment of Benign Prostatic Obstruction: 5-Year Outcomes of a Single-center Prospective Randomized Trial

OBJECTIVE

To assess long term functional and safety follow-up data after 80-W GreenLight photoselective vaporization (GL PV) of the prostate and transurethral resection of the prostate (TURP).

MATERIALS AND METHODS

Prospective randomized trial at a single tertiary referral center (Geneva, Switzerland). Patients were recruited in the outpatient clinic if they met the criteria for surgical treatment of benign prostatic obstruction. At baseline, 238 patients were treated either with the 80-W GL PV or monopolar TURP. After 5 years, data were available from 105 patients: 44 GL PV patients and 61 TURP patients. The primary outcome measure was the International Prostate Symptom Score (IPSS). Secondary outcome measures included maximum urinary flow rate (Qmax), postvoidal residual (PVR) and reoperation rate. Statistical analyses were performed using Stata 14 (StataCorp).

RESULTS

After 5 years of follow-up, mean improvements in International Prostate Symptom Score, postvoidal residual and maximum urinary flow rate were similar in both groups. The re-treatment rate was 14.3% in the GL PV group vs 11.9% in the TURP group (P = .9).

CONCLUSION

Noninferiority of the GL PV to TURP was confirmed in all functional and safety outcomes at 5-year follow-up. GL-PV could be a safe surgical alternative for patients suffering from benign prostatic obstruction.

Efficacy and Safety of Photoselective Vaporization of the Prostate with 120 W 532 nm Laser in Patients with Benign Prostatic Hyperplasia on Anticoagulation or Antiplatelet Therapy: Observations on Long-Term Outcomes

OBJECTIVE

The objective of this study was to evaluate the safety and effectiveness of photoselective vaporization of the prostate (PVP) in the treatment of patients with benign prostatic hyperplasia (BPH) on anticoagulant or antiplatelet therapy.

BACKGROUND

The "gold standard" of surgical treatment of BPH is transurethral resection of the prostate (TURP). Since the risk of complications associated with TURP is still significant, there is a continuous search for safer and equally effective procedures. One of them is PVP with a 532 nm potassium-titanyl-phosphate/lithium triborate (KTP/LBO) laser.

MATERIALS AND METHODS

A total of 109 patients underwent PVP with the use of the GreenLight HPS 120 W laser. Sixty-five (59.6%) of the patients were on anticoagulants or antiplatelet drugs, whereas 44 (40.4%) patients were not. Various objective and subjective parameters were evaluated intra- and postoperatively along with a 5-year follow-up to compare the results and safety of PVP in these two groups of patients.

RESULTS

No difference between the groups was found in intraoperative parameters, including operation and lasing time, as well as laser energy used. Also, no intraoperative complications were observed. There was no significant bleeding in any of the groups, and none of the patients required a blood transfusion. Catheterization and hospitalization time did not differ between both groups, and during the 5-year follow-up period, good objective and subjective results were observed, and the complication rates were comparable between the groups.

CONCLUSIONS

Our results demonstrate that PVP for patients with BPH is an effective and safe procedure with satisfactory long-term outcomes. Anticoagulant and antiplatelet drugs did not significantly influence the results, or the complication rates.

Long-term Patient-reported Clinical Outcomes and Reoperation Rate after Photovaporization with the XPS-180W GreenLight Laser

OBJECTIVE

To evaluate the long-term reported clinical outcomes after photovaporization of the prostate (PVP) with the XPS-GreenLight laser in patients with symptomatic benign prostatic enlargement (BPE).

DESIGN, SETTING, AND PARTICIPANTS

A prospective longitudinal study was performed for all consecutive patients with BPE who underwent PVP at our institution between 2010 and 2012. Patient-reported clinical outcomes were assessed at 1 mo, 3 mo, 12 mo, and 57 mo using International Prostate Symptoms Score, International Continence Society, and International Index of Erectile Function short-form questionnaires. Maximum flow rate (Qmax), postvoid residual urine measurements were assessed at 3 mo and 12 mo. Long-term satisfaction, complications, and reoperation rates were assessed by questionnaires. Prostate-specific antigen was measured at 3 mo, 12 mo, and 57 mo.

INTERVENTION

A single surgeon (GF) has practiced photovaporization with a Moxy fiber, under transrectal ultrasonography monitoring. Long-term clinical outcomes were evaluated using questionnaires.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

The primary measurement was the reoperation.

RESULTS AND LIMITATIONS

Eighty-four patients of 102 answered the long-term questionnaire. The mean age was 68±7.2 yr. The mean follow-up was 57.4±6.8 mo. The mean prostate volume was 73±38ml. After treatment, the mean International Prostate Symptoms Score decreased significantly from 19.9±6.4 to 6.1±5.6, 3.9±3.4, and 5.9±5.8, respectively, at 3 mo, 12 mo, and 57 mo. The mean prostate-specific antigen level decreased significantly (-56%) from 4.5±4.3ng/ml preoperatively to 2.0±2.0ng/ml and 2.6±2.2ng/ml, respectively, at 12 mo and 57 mo. The mean Qmax increased from 9.6±3.8ml/s preoperatively to 23.9±11.5ml/s and 25.2±9.2ml/s, respectively, at 3 mo and 12 mo. Overall reoperation rate was 4.8%(4/84). Limitations include the single surgeon single center design study and the lack of long-term objectives data such as urodynamic parameters (postvoid residual urine and Qmax).

CONCLUSIONS

Photovaporization of the prostate with the XPS-GreenLight laser is an effective technique able to durably improve reported clinical outcomes in patients with BPE.

PATIENT SUMMARY

In this study we looked at the long-term outcomes after laser therapy with XPS-GreenLight laser for benign prostatic enlargement. We found a few reoperation rates and good stable reported clinical outcomes after a mean follow-up of 57 mo. We conclude that this laser technique can offer durably good reported clinical outcomes.

5-year long-term efficacy of 120-W GreenLight photoselective vaporization of the prostate for benign prostate hyperplasia

PURPOSE

To investigate 5-year long-term postoperative efficacy in benign prostate hyperplasia (BPH) following 120-W GreenLight high-performance system photoselective vaporization of the prostate (HPS-PVP).

METHODS

This was a retrospective study of surgical outcomes in 159 men who underwent HPS-PVP and were followed over 60 months postoperatively. Definitions of treatment success were established based on the following three variables: international prostate symptom scores (IPSS), maximum flow rates (Qmax), and quality of life scores QoL). Logistic regression analyses were performed to determine predictors of the postoperative success.

RESULTS

Postoperative IPSS/QoL, Qmax and post-voided residual urine volume were significantly improved after HPS-PVP. Postoperative Prostate specific antigen and prostate volume were also well reduced and sustained for 5 years. The postoperative success rate was assessed as 82.1%, 80.8% and 76.1% for each 1-, 3-, and 5-year. Thirty-eight (23.9%) patients had immediate postoperative complications, which were managed successfully with nonsurgical methods. None required transfusions, two (1.2%) patients required endoscopic reoperation for postoperative voiding difficulty due to bladder neck contracture or urethral stricture, and five (3.1%) required HPS-PVP reoperation. Presence of diabetes, voiding symptom subscore, QoL, maximal cystometric capacity, and bladder outlet obstructive index were valuable preoperative parameters for predicting postoperative success.

CONCLUSIONS

HPS-PVP is an effective, long-term treatment option for BPH, with sustained efficacy of 76.1% at 5-year follow up. Several preoperative parameters could help to predict the durable surgical improvements.

Preoperative Urinary Retention Increased the Risk of Urinary Retention after Photoselective Vaporization of the Prostate

Purpose

The aim of the present study was to evaluate preoperative acute urinary retention (AUR) as a factor affecting the outcomes of patients who underwent photoselective vaporization of the prostate (PVP), both in terms of overall effectiveness and the postoperative incidence of AUR.

Materials and Methods

Baseline prostate characteristics were obtained for patients who underwent PVP, including prostate-specific antigen (PSA) levels, transrectal ultrasound findings, voiding diary parameters, the International Prostate Symptoms Score (IPSS), and uroflowmetry parameters. These parameters were assessed two weeks, one month, three months, six months, and three years postoperatively. Subjects were divided into AUR and non-AUR groups based on the preoperative occurrence of AUR.

Results

Of the 476 patients, 91 had at least one episode of preoperative AUR. The AUR group was found to be significantly older and to have significantly higher PSA levels, lower body mass indices, and larger prostates. At one year of follow-up, the total IPSS was 7.6±6.8 in the AUR group and 11.4±8.2 in the non-AUR group, with the AUR group showing a more significant improvement. In the non-AUR group, 17 of the 385 patients (4.4%) experienced postoperative retention, compared to 16 of the 91 patients (17.6%) patients in the AUR group.

Conclusions

Almost all patients exhibited improvements in subjective and objective voiding parameters following PVP, regardless of the presence of preoperative urinary retention. Patients with a preoperative history of AUR had a higher risk of postoperative retention.

A Novel Approach for the Treatment of Radiation-Induced Hemorrhagic Cystitis with the GreenLightTM XPS Laser

Introduction:

The treatment of pelvic malignancies with radiotherapy can develop severe sequelae, especially radiation-induced hemorrhagic cystitis. It is a progressive disease that can lead to the need for blood transfusion, hospitalizations, and surgical interventions. This tends to affect the quality of life of these patients, and management can at times be difficult. We have evaluated the GreenLight Xcelerated Performance System (XPS) with TruCoag, although primarily used for management of benign prostatic hypertrophy (BPH), for the treatment of radiation-induced hemorrhagic cystitis.

Materials and Methods:

After International Review Board (IRB) approval, a retrospective chart review was performed in addition to a literature search. A series of four male patients, mean age of 81 years, with radiation-induced hemorrhagic cystitis secondary to radiotherapy for pelvic malignancies (3 prostate cancer, 1 rectal cancer) were successfully treated with the GreenLight laser after unsuccessful treatment with current therapies described in the literature.

Results:

All four patients treated with the GreenLight laser had resolution of their hematuria after one treatment and were discharge from the hospital with clear urine.

Conclusion:

The GreenLight XPS laser shows promising results for the treatment of patients with radiation-induced hemorrhagic cystitis, and deserves further evaluation and validation, especially since there is limited data available in the literature regarding the use of this technology for the treatment of this devastating condition.

Long-term outcomes of 80-watt KTP and 120-watt HPS GreenLight photoselective vaporization of the prostate

OBJECTIVE

Photoselective vaporization of the prostate (PVP) is becoming a surgical treatment alternative of transurethral resection of the prostate for male lower urinary tract symptoms (LUTS) secondary to benign prostatic obstruction (BPO). We evaluated the outcome and postoperative complications of PVP performed by 80-W KTP and 120-W HPS GreenLight lasers (AMS®) over a 4-year period.

MATERIALS AND METHODS

This is a prospective monocentric study that included all patients who underwent PVP. They had routine follow-up at 1 month, 3 months, 6 months and every year until the fourth postoperative year. Listed data were maximum urinary flow rate (Qmax), International Prostate Symptom Score (IPSS), post-void residual (PVR) volume, prostate-specific antigen (PSA) and prostate volume. We collected the postoperative complications.

RESULTS

From September 2005 to May 2008, 77 patients out of a 409 patients cohort underwent surgery and were followed during 4 years. At 4 years mean Qmax increase was 82.5%; mean IPSS, PVR volume, PSA and prostate volume decreases were 79.1, 69.8, 43.8 and 22.9%, respectively. The main side effects observed were storage LUTS. A urinary catheter was replaced after a first withdrawal failure in 10 patients (15.6%) after surgery.

CONCLUSIONS

PVP showed a sustainable efficacy and an appealing tolerance profile during a 4-year period in patients with LUTS secondary to BPO.

[First 25 cases of photo-selective vaporization of the prostate (PVP) with 120-watt high performance system for benign prostatic hyperplasia]

PURPOSE

We examined the safety and efficacy of photo-selective vaporization of the prostate (PVP) using a 120-W high-performance system (HPS) for benign prostatic hyperplasia (BPH).

PATIENTS AND METHODS

We prospectively reviewed the records of 25 patients who had undergone PVP using a 120-W HPS in our institution. Patients were evaluated pre-operatively, and at 2 weeks and 1, 3, and 6 months postoperatively.

RESULT

The mean age was 73.6 years, and the mean estimated preoperative prostate volume was 51.5 ml. Laser vaporization was performed successfully in all 25 patients. The operating time was 104 +/- 29 minutes. The mean decrease in hemoglobin was 0.6 g/dl on post-operative day 1. The International Prostate Symptom Score (IPSS), QOL score, maximum flow rate, and residual urine volume were significantly improved 2 weeks after the procedure. There were no serious complications during the peri-operative period, and no patients were transfused.

CONCLUSION

PVP using a 120-W HPS was shown to be an effective, safe procedure for patients with BPH and lower urinary tract symptoms.

Review of current laser therapies for the treatment of benign prostatic hyperplasia

The gold standard for symptomatic relief of bladder outlet obstruction secondary to benign prostatic hyperplasia has traditionally been a transurethral resection of the prostate (TURP). Over the past decade, however, novel laser technologies that rival the conventional TURP have multiplied. As part of the ongoing quest to minimize complications, shorten hospitalization, improve resection time, and most importantly reduce mortality, laser prostatectomy has continually evolved. Today, there are more variations of laser prostatectomy, each with several differing surgical techniques. Although abundant data are available confirming the safety and feasibility of the various laser systems, future randomized-controlled trials will be necessary to verify which technique is superior. In this review, we describe the most common modalities used to perform a laser prostatectomy, mainly, the holmium laser and the potassium-titanyl-phosphate lasers. We also highlight the physical and clinical characteristics of each technology with a review of the most current and highest-quality literature.

EAU guidelines on the treatment and follow-up of non-neurogenic male lower urinary tract symptoms including benign prostatic obstruction

OBJECTIVE

To present a summary of the 2013 version of the European Association of Urology guidelines on the treatment and follow-up of male lower urinary tract symptoms (LUTS).

EVIDENCE ACQUISITION

We conducted a literature search in computer databases for relevant articles published between 1966 and 31 October 2012. The Oxford classification system (2001) was used to determine the level of evidence for each article and to assign the grade of recommendation for each treatment modality.

EVIDENCE SYNTHESIS

Men with mild symptoms are suitable for watchful waiting. All men with bothersome LUTS should be offered lifestyle advice prior to or concurrent with any treatment. Men with bothersome moderate-to-severe LUTS quickly benefit from α1-blockers. Men with enlarged prostates, especially those >40ml, profit from 5α-reductase inhibitors (5-ARIs) that slowly reduce LUTS and the probability of urinary retention or the need for surgery. Antimuscarinics might be considered for patients who have predominant bladder storage symptoms. The phosphodiesterase type 5 inhibitor tadalafil can quickly reduce LUTS to a similar extent as α1-blockers, and it also improves erectile dysfunction. Desmopressin can be used in men with nocturia due to nocturnal polyuria. Treatment with an α1-blocker and 5-ARI (in men with enlarged prostates) or antimuscarinics (with persistent storage symptoms) combines the positive effects of either drug class to achieve greater efficacy. Prostate surgery is indicated in men with absolute indications or drug treatment-resistant LUTS due to benign prostatic obstruction. Transurethral resection of the prostate (TURP) is the current standard operation for men with prostates 30-80ml, whereas open surgery or transurethral holmium laser enucleation is appropriate for men with prostates >80ml. Alternatives for monopolar TURP include bipolar TURP and transurethral incision of the prostate (for glands <30ml) and laser treatments. Transurethral microwave therapy and transurethral needle ablation are effective minimally invasive treatments with higher retreatment rates compared with TURP. Prostate stents are an alternative to catheterisation for men unfit for surgery. Ethanol or botulinum toxin injections into the prostate are still experimental.

CONCLUSIONS

These symptom-oriented guidelines provide practical guidance for the management of men experiencing LUTS. The full version is available online (www.uroweb.org/gls/pdf/12_Male_LUTS.pdf).

[European Association of Urology guidelines on laser technologies]

CONTEXT

The European Association of Urology (EAU) Guidelines Office has set up a guideline working panel to analyse the scientific evidence published in the world literature on lasers in urologic practice.

OBJECTIVE

Review the physical background and physiologic and technical aspects of the use of lasers in urology, as well as current clinical results from these new and evolving technologies, together with recommendations for the application of lasers in urology. The primary objective of this structured presentation of the current evidence base in this area is to assist clinicians in making informed choices regarding the use of lasers in their practice.

EVIDENCE ACQUISITION

Structured literature searches using an expert consultant were designed for each section of this document. Searches were carried out in the Cochrane Database of Systematic Reviews, the Cochrane Central Register of Controlled Trials, and Medline and Embase on the Dialog/DataStar platform. The controlled terminology of the respective databases was used, and both Medical Subject Headings and EMTREE were analysed for relevant entry terms. One Cochrane review was identified.

EVIDENCE SYNTHESIS

Depending on the date of publication, the evidence for different laser treatments is heterogeneous. The available evidence allows treatments to be classified as safe alternatives for the treatment of bladder outlet obstruction in different clinical scenarios, such as refractory urinary retention, anticoagulation, and antiplatelet medication. Laser treatment for bladder cancer should only be used in a clinical trial setting or for patients who are not suitable for conventional treatment due to comorbidities or other complications. For the treatment of urinary stones and retrograde endoureterotomy, lasers provide a standard tool to augment the endourologic procedure.

CONCLUSIONS

In benign prostatic obstruction (BPO), laser vaporisation, resection, or enucleation are alternative treatment options. The standard treatment for BPO remains transurethral resection of the prostate for small to moderate size prostates and open prostatectomy for large prostates. Laser energy is an optimal treatment method for disintegrating urinary stones. The use of lasers to treat bladder tumours and in laparoscopy remains investigational.

Complications and early postoperative outcome in 1080 patients after thulium vapoenucleation of the prostate: results at a single institution

BACKGROUND

Thulium vapoenucleation of the prostate (ThuVEP) has been introduced as a minimally invasive treatment for benign prostatic obstruction (BPO).

OBJECTIVE

To analyze immediate outcomes and the institutional learning curve of ThuVEP, and to report its standardized complication rates, using the modified Clavien classification system (CCS) to grade perioperative complication rates.

DESIGN, SETTINGS, AND PARTICIPANTS

A prospective evaluation of 1080 patients undergoing ThuVEP from January 2007 until May 2012 at our institution.

INTERVENTION

ThuVEP was performed using the 2-μm, continuous-wave, thulium:yttrium-aluminum-garnet laser.

OUTCOME MEASUREMENTS AND STATISTICAL ANALYSIS

Preoperative status, surgical details, and immediate outcome were recorded for each patient. Perioperative complications were classified according to the modified CCS.

RESULTS AND LIMITATIONS

Median prostate size was 51 ml (interquartile range [IQR]: 36-78.7). Median operation time was 56 min (IQR: 40-80), and median enucleation time was 32.5 min (IQR: 22-50). Median catheterization time was 2 d (IQR: 2-2); median length of hospital stay was 4 d (IQR: 3-5). Median resected tissue weight was 30 g (IQR: 16.00-51.25). Incidental carcinoma of the prostate was detected in 59 (5.5%) patients. Median maximum urinary flow rate (8.9 vs 18.4 ml/s) and postvoid residual urine volume (120 vs 20 ml) changed significantly (p<0.001). Minor complications occurred in 24.6% of the patients (Clavien 1: 20.8%; Clavien 2: 3.8%). Early reinterventions were necessary in 6.6% of the patients (Clavien 3a: 0.6%; Clavien 3b: 6%). One Clavien 4 complication occurred (0.09%). The overall complication rates decreased significantly over time due to decreasing Clavien 1, 2, and 3b events. The major limitations of the study are the prospective, unicentric study design, the lack of a control group, and that only short-term data were documented on morbidity and efficacy of the ThuVEP procedure.

CONCLUSIONS

ThuVEP is a safe and effective procedure for the treatment of symptomatic BPO, with low perioperative morbidity.

Angular effect of optical fiber movement on endoscopic laser prostatectomy

BACKGROUND AND OBJECTIVE

The optimal fiber manipulation during laser prostatectomy has been highlighted as a critical element to achieve desirable clinical outcomes. However, scientific understanding of the physical interplay between fiber movement and ablative tissue response is still lacking. The objective of this study was to quantitatively investigate the effect of angular movement of an optical fiber on tissue ablation performance.

STUDY DESIGN/MATERIALS AND METHODS

Porcine kidney was employed as a tissue model in vitro. A 180 W 532 nm surgical laser with 750 µm side-firing fibers was utilized to mimic clinical laser prostatectomy. The effect of fiber manipulation parameters on the tissue such as irradiance, number of overlapping pulses (OP), and beam path length (BPL) was assessed at various fiber sweeping (rotational) angles ranging from 0° to 120°. Morphological properties of the post-irradiated tissue were also evaluated in light of ablation depth, coagulative necrosis, and volumetric ablation density (VAD).

RESULTS

As sweeping angle (SA) increased, both laser irradiance and number of OP decreased but BPL increased. Ablation depth was maximized (5.4 ± 1.0 mm) at SAs less than 30° but decreased at higher SAs. The SAs of 15° and 30° demonstrated the minimal thickness of denaturized tissue (0.74 ± 0.14 mm) and VAD (total laser energy/ablation volume (AV) ≈ 4.6 ± 0.46 J/mm(3) ). Decreasing depth and increasing tissue coagulation associated with increasing SA resulted from substantial reduction in both beam irradiance and number of OP, eventually impeding ablation process. Excessive tissue denaturation also occurred when no rotational motion was applied to the fiber possibly due to plume shielding.

CONCLUSION

Inefficient tissue ablation could lead to adverse post-operative complications due to unwanted thermal injury to peripheral tissue. A SA of 30° was found to be desirable for effective tissue ablation, and further clinical investigations will validate the current findings.

Photoselective vaporization of the prostate using GreenLight 120-W lithium triborate laser to treat symptomatic benign prostatic hyperplasia: A single-centre prospective study

OBJECTIVE

We evaluated the safety and efficacy of photoselective vaporization of the prostate (PVP) using GreenLight 120-W lithium triborate (LBO) laser to treat symptomatic small-to-medium sized benign prostatic hyperplasia (BPH).

METHODS

This prospective non-controlled observational study included symptomatic BPH men ≥50 years with international prostate symptom score (IPSS) ≥14, prostate volume (PV) ≤80 cc and maximum flow rate (Q-max) ≤15 mL/s. PVP was performed using the GreenLight 120-W LBO laser machine. Patients were assessed at baseline and postoperatively at discharge, 2 weeks, and 3, 6 and 12 months. We measured changes in IPSS, PV, PSA, Q-max, post-void residual (PVR), hemoglobin (Hb), serum sodium (Na+) and reported complications. Statistical significance was p < 0.05.

RESULTS

The study included 103 men with mean age of 67 (±standard deviation)±9.7 years. Thirty patients were on indwelling urethral catheters for refractory urinary retention and 12 on ongoing anticoagulants. The mean baseline IPSS, PV, PSA, Q-max and PVR parameters significantly improved at follow-up (p < 0.001; each). Mean measurements at baseline versus at six months were: IPSS 25.6 ± 4.2 vs. 7.4±2.3; PV 44.6 ± 9.2 vs. 21.6 ± 6.3 cc (51.6% reduction); Q-max 5.8 ± 3.4 vs. 20.4 ± 4.8 mL/s; PVR 110 ± 40 vs. 35 ± 9 cc. Mean baseline Hb and serum Na+ declined non-significantly (p > 0.05) at discharge and at 2 weeks. No patient needed a blood transfusion. Secondary procedures were needed in 2 patients for urethral and bladder neck strictures. The re-treatment rate for residual adenoma was 0.97%.

CONCLUSION

PVP using the GreenLight 120-W LBO laser to treat small-to-medium sized symptomatic BPH demonstrated significant improvements in efficacy parameters and high safety profile within 12 months of follow-up. The procedure entails good hemostasis with minimal blood loss even in patients receiving ongoing anticoagulants.

Laser prostatectomy of lower urinary tract symptoms due to benign prostate enlargement: a critical review of evidence

PURPOSE OF REVIEW

Different transurethral prostatic laser systems are available. In 2011, new Oxford evidence levels (LoEs) were published with significant changes compared with the former version. They are easier to use and incorporate more clinical aspects. Randomized trials of laser systems used before 2002, except Holmium laser, were not included in this critical evidence analysis, as these techniques are not in clinical use any more.

RECENT FINDINGS

Twenty-five [18 Holmium enucleation of the prostate (HoLEP) and seven photoselective vaporization of the prostate (PVP)] randomized trials covering transurethral electroresection of the prostate or HoLEP, PVP or Thulium laser enucleation were identified. According to evidence levels, there is a large gap in terms of long-term follow-up. The majority of randomised controlled trials are of low quality. Typically with HoLEP, many articles were published covering the same patient population (LoE II). Only one randomised controlled trial was published with Tm:YAG prostatectomy (LoE II) and none with diode lasers (980-1340 nm, LoE IV-V). Large cohort studies (LoE III-IV) provide additional evidence for PVP and HoLEP, typically for subgroups.

SUMMARY

In 2011, higher evidence on HoLEP and PVP has been published. Evidence levels for HoLEP and PVP are comparable with meta-analysis (LoE II). However, evidence that laser prostatectomy is better than transurethral electroresection of the prostate in terms of efficacy is lacking (LoE II). All lasers are safer in terms of perioperative bleeding (LoE II).

Potassium-titanyl-phosphate laser photoselective vaporization for benign prostatic hyperplasia: 5-year follow-up from a district general hospital

BACKGROUND AND PURPOSE

The 80-W potassium-titanyl-phosphate (KTP) laser photoselective vaporization of the prostate (PVP) is a minimally invasive surgical option for patients with symptomatic benign prostatic hyperplasia, although evidence of long-term efficacy is limited. We present the long-term outcomes from a heterogeneous patient population.

PATIENTS AND METHODS

We prospectively collected data for all patients who underwent 80-W KTP laser PVP treatment between 2004 and 2005. Evaluation occurred pr-operatively, and then at 3, 6, 12, and 60 months postoperatively. This included International Prostate Symptom Score (IPSS), peak urinary flow rate (Qmax), postvoid residual (PVR) volume, serum prostate-specific antigen measurement, and transrectal ultrasonography-estimated prostate volume.

RESULTS

A total of 115 patients were eligible for analysis, with a mean age of 77 years and mean prostate volume of 55.8 cc. Of these, 74% were operated on for lower urinary tract symptoms, 23% for acute urinary retention, and 3% for chronic retention; 30% of patients were American Society of Anesthesiologists score ≥ 3, and 93% were treated as 23-hour stays. No patients needed blood transfusion, and there were no cases of transurethral resection syndrome. An initial trial-without catheter failed in 11 (9.6%), although 8 of these successfully voided after a further week. At 5-year follow-up, mean Qmax improved from 8.0 ± 5.0 mL to 13.9 ± 7.7 mL and mean IPSS improved from 22 ± 5 to 9 ± 7. There were no cases of urethral strictures, but there was a 3.3% rate of bladder neck stenosis and an overall re-treatment rate of 21% over 5 years.

CONCLUSION

We confirm the long-term durability of the 80-W KTP laser PVP with minimal perioperative morbidity. It is therefore a safe option for high-risk patients with medical comorbidities, although its high reoperation rate may limit its use to this specific patient population.

EAU guidelines on laser technologies

CONTEXT

The European Association of Urology (EAU) Guidelines Office has set up a guideline working panel to analyse the scientific evidence published in the world literature on lasers in urologic practice.

OBJECTIVE

Review the physical background and physiologic and technical aspects of the use of lasers in urology, as well as current clinical results from these new and evolving technologies, together with recommendations for the application of lasers in urology. The primary objective of this structured presentation of the current evidence base in this area is to assist clinicians in making informed choices regarding the use of lasers in their practice.

EVIDENCE ACQUISITION

Structured literature searches using an expert consultant were designed for each section of this document. Searches were carried out in the Cochrane Database of Systematic Reviews, the Cochrane Central Register of Controlled Trials, and Medline and Embase on the Dialog/DataStar platform. The controlled terminology of the respective databases was used, and both Medical Subject Headings and EMTREE were analysed for relevant entry terms. One Cochrane review was identified.

EVIDENCE SYNTHESIS

Depending on the date of publication, the evidence for different laser treatments is heterogeneous. The available evidence allows treatments to be classified as safe alternatives for the treatment of bladder outlet obstruction in different clinical scenarios, such as refractory urinary retention, anticoagulation, and antiplatelet medication. Laser treatment for bladder cancer should only be used in a clinical trial setting or for patients who are not suitable for conventional treatment due to comorbidities or other complications. For the treatment of urinary stones and retrograde endoureterotomy, lasers provide a standard tool to augment the endourologic procedure.

CONCLUSIONS

In benign prostatic obstruction (BPO), laser vaporisation, resection, or enucleation are alternative treatment options. The standard treatment for BPO remains transurethral resection of the prostate for small to moderate size prostates and open prostatectomy for large prostates. Laser energy is an optimal treatment method for disintegrating urinary stones. The use of lasers to treat bladder tumours and in laparoscopy remains investigational.

Potassium-titanyl-phosphate laser vaporization of the prostate: a case series of an unusual complication

Abstract Despite its increasing use in the management of symptomatic benign prostatic hyperplasia, the long-term complications after potassium-titanyl-phosphate photoselective vaporization of the prostate are poorly reported. We describe a rare complication of this technology-calculi formation in the prostatic urethra. All patients presented with visible hematuria and variable lower urinary tract symptoms up to 5 years after the original surgery. In all cases, the calculi were successfully removed endoscopically. Possible causes for this unusual complication are discussed, and the importance of warning patients about this potential long-term complication are highlighted.

The relationship between photoselective vaporization of the prostate and sexual function

Although transurethral resection of the prostate remains the gold standard treatment of lower urinary tract symptoms that are refractory to medical therapy, photovaporization of the prostate (PVP) has become a popular alternative. Early PVP studies have been encouraging, but insufficient data exist regarding the effects of PVP on long-term sexual function. This article analyzes the published data and briefly reviews the literature. The studies on PVP are heterogeneous, and other than one that showed a decreased International Index of Erectile Function score after PVP, all the studies analyzed the population at large and did not focus on preoperatively potent patients. Further well-conducted and prospective studies are needed to confirm the impact of PVP on erectile function.

Long-term results of surgical techniques and procedures in men with benign prostatic hyperplasia

Benign prostatic hyperplasia (BPH) is one of the most common conditions associated with the aging male. Surgical management of lower urinary tract symptoms attributed to BPH has progressed over time as urologic surgeons search for more innovative and less invasive forms of treatment. Transurethral resection of the prostate (TURP) has long been the "gold standard" to which all other forms of treatment are compared. There are several different methods of surgical treatment of BPH, including whole gland enucleation/intact removal, vaporization, and induction of necrosis with delayed reabsorption as well as hybrid techniques. As with any form of surgical intervention, long-term results define success. Long-term follow-up consists of examining overall efficacy with attention to associated adverse events. TURP has the luxury of the longest follow-up, while less invasive forms of treatment starting to acquire long-term data. There are several surgical options for BPH; newer methods do show promise, while the "gold standard" continues to demonstrate excellent surgical results.

Photoselective GreenLight™ laser vaporization versus transurethral resection of the prostate in Greece: a comparative cost analysis

PURPOSE

To compare photoselective vaporization of the prostate (PVP) using the 120W GreenLight™ laser with transurethral resection of the prostate (TURP) in terms of their cost to the Greek National Health Service (NHS) or to the Public Insurance Sickness Funds (PISF).

PATIENTS AND METHODS

A prospective cost evaluation with 1-year follow-up of 60 patients with infravesical obstruction of benign prostatic hyperplasia origin who underwent o either TURP (n=30) or PVP (n=30). The cost of equipment, consumables, anesthesia, drugs, inpatient hospitalization, and complication management within 1 year postoperatively were used to calculate the cost for the NHS. PISF reimbursements to hospitals and PISF opportunity cost from the lost days of work were used to calculate PISF perspective.

RESULTS

From the NHS perspective, the average cost was €1722 ($2371) for PVP and €2132 ($2935) for TURP. From the PISF perspective, the average cost for hospital reimbursement was €1348 ($1856) in the case of PVP and €938 ($1291) in the case of TURP. Nevertheless, in the case of patients still working, total PISF reimbursement cost was €2038 ($2806) for PVP and €2666 ($3671) for TURP.

CONCLUSIONS

PVP for 40 to 70 cc prostates is preferable from the perspective of the NHS. From the perspective of PISF, PVP is less costly only in the case of patients who are still working, because patients who undergo PVP stay much less out of work. Further investigation in larger populations as well as in different protocols of PVP hospitalization and return to work times is deemed necessary to reinforce the conclusions of this study.

Bloodless management of benign prostatic hyperplasia: medical and minimally invasive treatment options

Benign prostatic hyperplasia (BPH) is a medical condition affecting a wide range of the aging male population resulting in various degrees of lower urinary tract symptoms (LUTS). Today, a variety of medical therapies and minimally invasive BPH treatment modalities are available. Medical therapy includes α(1) blockers, 5()α reductase inhibitors and combination therapy. When these options fail, surgery is indicated. Transurethral resection of the prostate (TURP) is still considered the gold standard surgical treatment for BPH. Nevertheless, numerous minimally invasive treatment alternatives are available that are comparable in effectiveness to TURP, with significantly less morbidity. In this article, current treatment options for BPH are reviewed with respect to their indications, long-term safety and efficacy in relieving BPH related LUTS. The selection of the type of BPH treatment should be based on the physician's experience, patient's co-morbidities as well as the prostate size and clinical disease progression.