title: The evaluation of tissue mass loss in the incision line of prostate with benign hyperplasia performed using holmium laser and cutting electrode.
abstract: BACKGROUND
  The aim of this study is to compare the changes in the incision line of prostatic adenoma using a monopolar cutting electrode and holmium laser, as well as the assessment of associated tissue mass and volume loss of benign prostatic hyperplasia (BPH).
  
  
  METHODS
  The material used in this study consisted of 74 preparations of prostatic adenoma obtained via open retropubic adenomectomy, with an average volume of 120.7 ml. The material obtained cut in vitro before fixation in formaldehyde. One lobe was cut using holmium laser, the other using a monopolar cutting electrode. After the incision was made, tissue mass and volume loss were evaluated. Thermocoagulation changes in the incision line were examinedunder light microscope.
  
  
  RESULTS
  In the case of the holmium laser incision, the average tissue mass loss was 1.73 g, tissue volume loss 3.57 ml and the depth of thermocoagulation was 1.17 mm. When the monopolar cutting electrode was used average tissue mass loss was 0.807 g, tissue volume loss 2.48 ml and the depth of thermocoagulation was 0.19 mm.
  
  
  CONCLUSIONS
  Where holmium laser was used, it was observed that the layer of tissue with thermocoagulation changes was deeper than in the case of the monopolar cutting electrode. Moreover, it was noticed that holmium laser caused bigger tissue mass and volume loss than the cutting electrode.
authors.affiliation: 2 Clinic of Urology, Medical University of Łódź, Poland.
authors.forename: Mariusz
authors.initials: M
authors.lastname: Szewczyk
authors.affiliation: Pathology Unit and Department of Oncology, Medical University of Łódź, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Jesionek-Kupnicka
authors.affiliation: 2 Clinic of Urology, Medical University of Łódź, Poland.
authors.forename: Marek Ireneusz
authors.initials: MI
authors.lastname: Lipiński
authors.affiliation: 2 Clinic of Urology, Medical University of Łódź, Poland.
authors.forename: Piotr
authors.initials: P
authors.lastname: Lipinski
authors.affiliation: 2 Clinic of Urology, Medical University of Łódź, Poland.
authors.forename: Waldemar
authors.initials: W
authors.lastname: Różański
keywords: BPH; TURP; holmium laser; mass loss; prostate