Erfahrungen mit der interstitiellen Laserkoagulation der Prostata

Technical Basics of Medical Laser Systems

“…Commercially available fibres achieve, at A = 2.94 ].lm, damping values of about 0.5 to 1 dB/m, i.e. 10 to 20%/m [33,41].…”

“…6; [23,24,[39][40][41][42][43][44]). By shaping the tip of the glass dome appropriately and under cystoscopic visual control, it is possible to puncture the prostate lobes directly.…”

“…This contact procedure is applied to benign changes, e.g. to hereditary and acquired vessel anomalies [6,48,49], or to benign prostate hyperplasia (BPH) [24,25,27,[35][36][37][39][40][41][42]44,45] as well as the destruction of malignant tumours or metastases. In the latter case, it is mainly a palliative treatment [1][2][3][4][5]7,8,12,14,16,18,20,22,25,[29][30][31][32][33][34]38,45,56,[60][61][62][63][64][65][66][67].…”

Invited. Predictability of the size of laser‐induced lesions in T1‐weighted MR images obtained during interstitial laser‐induced thermotherapy of benign prostatic hyperplasia

“…Laser waveguides with quartz glass-clad tips that diffuse laser light (2) are inserted into hyperplastic prostate tissue either transurethrally through an endoscope or transperineally under ultrasound guidance. Radiation of an Nd:YAG laser or similar laser light source is applied interstitially via the optical waveguides (1,3,(4)(5)(6)(7)(8). In the tissue, laser energy is transformed into thermal energy that induces intraprostatic coagulation necroses, which decompose secondarily through inflammatory processes (1,3,(4)(5)(6)9).…”

“…Radiation of an Nd:YAG laser or similar laser light source is applied interstitially via the optical waveguides (1,3,(4)(5)(6)(7)(8). In the tissue, laser energy is transformed into thermal energy that induces intraprostatic coagulation necroses, which decompose secondarily through inflammatory processes (1,3,(4)(5)(6)9). Prostate volume reduces as necrotic lesion volume decreases (4.9).…”