Long-term clinical outcome of transurethral microwave thermotherapy (TUMT) 1991-1999 at Karolinska Hospital, Sweden

Transurethral Microwave Thermotherapy (TUMT) in the Treatment of Benign Prostatic Hyperplasia: A Preliminary Report

BACKGROUND One treatment option for benign prostatic hyperplasia (BPH) is transurethral microwave thermotherapy (TUMT). Unfortunately, TUMT has been increasingly marginalized recently. The aim of this study was to evaluate erectile function and urinary symptoms in patients after TUMT for BPH and compare the results with those of patients on pharmacological treatment for BPH. MATERIAL AND METHODS The study group consisted of 840 patients with BPH treated with TUMT and a control group consisting of 1040 patients who underwent pharmacotherapy. Erectile dysfunction was evaluated using the International Index of Erectile Function-5 questionnaire and the Individual Postoperative Erectile Assessment (IPEA) questionnaire, which was created by the authors for this study. Urinary symptoms were evaluated using the International Prostate Symptom Score (IPSS) questionnaire. RESULTS More than 50% of all patients experienced an improvement in urinary symptoms after TUMT, compared with only approximately 30% in the control group. Differences in each of the IPSS symptom scales between the TUMT and control groups were statistically significant (P<0.031, P<0.041, and P<0.025 for mild, moderate, and severe symptoms, respectively). Improvement in erectile dysfunction after TUMT was also statistically significant (P<0.0001, P<0.0001, P<0.05 for mild, moderate, and severe erectile dysfunction, respectively). Based on the IPEA questionnaire, approximately 24% of the TUMT group reported significant improvement in erectile function, while a decrease in erectile function was reported in the control group. CONCLUSIONS TUMT may still be a valuable option in the treatment of BPH. TUMT may be especially suitable for patients who expect to improve urinary symptoms without decreasing erectile function.

Revival of thermotherapy for benign prostatic hyperplasia

PURPOSE OF REVIEW

Transurethral resection of the prostate (TURP) has long been held as the gold standard for treatment of benign prostatic hyperplasia (BPH); however, there has been significant innovation in other less invasive alternative treatments for BPH in recent years. BPH treatment guidelines now recommend minimally invasive therapy be considered as a treatment option alongside TURP and medical management. Our purpose is to review the current evidence supporting the safety, effectiveness, and durability of transurethral microwave thermotherapy (TUMT) as a minimal invasive technique.

RECENT FINDINGS

Recent clinical studies of TUMT have provided significant evidence regarding safety, efficacy, and durability. TUMT has now become a minimally invasive office-based alternative to both standard TURP and medical therapy in the treatment of bladder outlet obstruction and lower urinatry tract symptoms due to BPH.

SUMMARY

TUMT treatment has improved with the advent of later generation devices. This well tolerated, effective, and durable therapy for the treatment of BPH has definitively found its place as one of the alternatives to TURP. Anestheisa-free outpatient capability, lack of sexual side-effects, and avoidance of actual surgery are attractive to patient and clinician alike. TUMT deserves reconsideration in clinical practices as a suitable treatment alternative to TURP and medical therapy.

Transurethral Microwave Thermotherapy: Clinical Results after 11 Years of Use

PURPOSE

To evaluate the durability of the effect of transurethral microwave thermotherapy (TUMT) for lower urinary-tract symptoms (LUTS) suggestive of bladder outlet obstruction (BOO).

PATIENTS AND METHODS

A total of 841 patients with LUTS received TUMT using the Prostatron device at Sahlgrenska University Hospital, Sweden. Two treatment programs were used: low-energy Program 2.0 and high-energy Program 3.5. A questionnaire, including International Prostate Symptom Score (IPSS), quality of life (QoL) score, and questions about general health status, was sent to all the patients. The mean followup after TUMT was 8.8 years for Program 2.0 and 2.5 years for Program 3.5.

RESULTS

At the end of follow-up, 67% of the patients treated with Program 2.0 were satisfied with the TUMT. During the follow-up period, 37% of patients experienced worsened symptoms, 18% various complications (e.g., hematuria), and 25% transient urinary-tract infection, and 16% went into retention. Secondary treatment (repeat TUMT, transurethral resection, medical therapy) was needed in 32% of patients. The mean IPSS was 13.5, and QoL score decreased to 2.1. With Program 3.5, 82% of the patients were satisfied, with another 17% having increased symptoms, 17% various complication, 25% urinary tract infection, and 26% retention. Only 7% of patients needed secondary treatment. The IPSS and QoL score went down to 11.4 and 1.6, respectively.

CONCLUSION

These long-term data show that TUMT produces durable improvement and, with its safety and low retreatment rate, presents an attractive alternative for patients with LUTS suggestive of BOO.

Application of External Microwave Thermotherapy in Urology: Past, Present, and Future

The excellent clinical results of transurethral microwave thermotherapy (TUMT) for the treatment of symptomatic benign prostatic hyperplasia (BPH) gave to TUMT the leading position among the microwave thermotherapy modalities available for the treatment of different urologic conditions. Research in TUMT has focused on operating software, temperature monitoring, intraprostatic heat distribution, cell-kill calculations, and correlations with clinical variables. Randomized comparisons of TUMT with other established therapies for BPH, including transurethral resection, have facilitated the evaluation of the clinical outcome, durability, morbidity, and costs of the treatment. The applications of microwave thermotherapy in other urologic diseases are also presented in this review.

Thermotherapy and thermoablation for benign prostatic hyperplasia

PURPOSE OF REVIEW

From all the available thermoablative methods for the treatment of symptomatic benign prostatic hyperplasia, transurethral microwave thermotherapy is considered as standard in minimally invasive management. The literature is enriched by several new studies on transurethral microwave thermotherapy, and thus this review presents up-to-date information about thermotherapy.

RECENT FINDINGS

New studies have provided significant information regarding differences in outcome for devices with different protocols and selection criteria, confirming the superiority of high-energy programmes. Furthermore, monitoring of the intraprostatic temperature promises better clinical results by means of individualization of the treatment. Long-term results have been available and allow the evaluation of the fundamental issue of treatment durability. Improvement after high-energy transurethral microwave thermotherapy remains durable for more than 2.5 years. Randomized studies comparing this treatment with other established therapies for benign prostatic hyperplasia, including medical treatment and transurethral resection of the prostate, have also contributed to an evaluation of the morbidity, and costs of treatment. Clinical outcomes with transurethral microwave thermotherapy are in the range of those obtained with transurethral resection of the prostate and are superior to those of medical management. Retreatment after transurethral resection of the prostate emerges because of complications following the procedure, whereas retreatment after transurethral microwave thermotherapy is as a result of treatment failure. In addition, the rate of failure of medical management is almost seven times higher than that for transurethral microwave thermotherapy. Thus, the latter seems to play a dominant role in the economic models used to assess the cost-efficiency of different treatment modalities for benign prostatic hyperplasia.

SUMMARY

The recent innovations in high-energy transurethral microwave thermotherapy provide better and more durable clinical outcomes and lower morbidity, and strengthen its position as an established treatment for benign prostatic hyperplasia. However, there is always room for improvement, so further research on therapeutic protocols, treatment monitoring and selection criteria are to be welcomed.