PURPOSE To evaluate the impact of photoselective vaporization of the prostate (PVP) with a 120-W GreenLight high-performance system on erectile function in a 2-year follow-up study. MATERIALS AND METHODS One hundred seventy-seven patients who underwent PVP during 2008 to 2012 were analyzed retrospectively. The patients were divided into 5 groups according to their preoperative 5-item Internat...

For decades, transurethral resection of the prostate (TUR-P) has been considered the “gold standard” surgical procedure for men with lower urinary tract symptoms (LUTS) secondary to benign prostatic hyperplasia (BPH). The GreenLight (GL) laser has a wavelength of 532 nm the range of visible green light. The emitted energy is mostly absorbed by hemoglobin, thus heating the intracellular fluid in...

We have theoretically investigated the role of thermal diffusion and chemical kinetics as a possible dynamic explanation for the preferential ablative properties of infrared radiation from a free-electron laser (FEL). The model is based on a laminar system composed of alternating layers of protein and saline. We have compared exposure to 3 microm where water is the main absorber and 6.45 microm...

Metal-carbon binary clusters generated by the laser vaporization of metal-doped carbon materials used for macroscopic production of endohedral metallofullerene or SWNTs were studied. Positive and negative clusters generated by the laser-vaporization supersonicexpansion cluster beam source were directly injected to the FT-ICR mass spectrometer. Depending on the metal species, the generated clust...

Benign prostatic hyperplasia (BPH) is a condition that occurs increasingly with age. The established gold standard treatment for BPH has been the electrocautery-based transurethral resection of the prostate (TURP). TURP, however, is associated with several complications and side effects. Therefore, there is an increasing interest in a number of emerging minimally invasive therapies as alterativ...

The thermal effect is the most common effect of tissue–laser interaction in urology. With the widespread use of endoscopic instruments laser applications in urology have dramatically increased. Various urological conditions can nowadays be successfully treated with lasers. In the treatment of benign prostate hyperplasia (BPH), holmium laser enucleation of the prostate (HoLEP) and photoselective...

PURPOSE We determined the impact of prostate volume on the efficacy of the high-power (80 W) potassium-titanyl-phosphate (KTP) photoselective laser vaporization of the prostate in men with lower urinary tract symptoms (LUTS). MATERIALS AND METHODS Patients were stratified into 3 groups according to prostate volume: '< 40 g' (n = 49) and '40-59 g' (n = 49) and '≥ 60 g' (n = 22). Median follow-...

The aim of this study was to develop a new simple method for measuring the vaporized volume and to evaluate the outcome of high-power potassium-titanyl-phosphate (KTP) photoselective laser vaporization. A total of 65 patients, with a mean age of 67.7 yr (range 53 to 85), were included in the primary analysis. The vaporized volume was calculated as the pre-operative volume minus the immediate po...

Laser electrospray mass spectrometry (LEMS) is demonstrated for pharmaceutical samples at atmospheric pressure. A nonresonant, femtosecond duration laser pulse vaporizes native samples at atmospheric pressure into an electrospray plume for ionization with subsequent transfer into a time-of-flight mass spectrometer. The active ingredients in pharmaceutical tablets were detected in the presence o...

The spectrum of the luminescence pulse from collapsing laser-induced bubbles in water and cryogenic liquids has been measured. For small bubbles in water the spectrum approximates that of a black-body at about 7800 K, while for bubbles whose maximum radius is greater than 1 mm the OH* molecular band at 310 nm becomes apparent, a feature which is also seen in multi-bubble sonoluminescence. The l...