Abstract
Among the many devices for lithotripsy inside the body, the lithotripsy device using the Holmium-YAG laser has evolved into the widely used tool for treating urinary tract stones. Purpose: The aim of this research is to show the effect of parameters for Ho-YAG laser (2100 nm) on fragmentation time Intra Corporeal and stone composition for stone disease through is to investigating of stone composition and setting pulsed holmium laser energy with calculating time period for crushing stone. Patients & Methods: from the period of March 2020 to august. 2020 a 63 patient were selected to include in this study (outcome of surgery for lithotripsy ureteral stone below 17 mm by laser) has been 10-85 years for male and female collected from the Hussein Teaching hospital department of urology. using Ho- YAG laser irradiation wave length 2.12 μw interaction absorption coefficient (30 cm-1) at maximum output power 0.5-1.2J for width of the laser pulse is 350 microseconds in an optical fiber with a diameter of 272-550 microns with an energy of 0.8 - 1.2 joules at 6-10 hertz. The samples obtained were selection collections of fragments retrieved following lithotripsy. The aim of this study was to determine the chemical compositions of urinary stones that had been removed, Use infrared spectroscopy Within the range (400-4000) cm-1 using a (Bruker FTIR - Spectrometer) device. Results: This study show mean stone size below 14 mm was (2.758±0.919) mm for First group of 21 stones of the same composition ( oxalate calcium ) with pulse energies of o.8, 1.2 and 1.2 J with repetition rate was 6, 8 and 10 HZ respectively for ureteric stone which included 12 male 57.14 % with 9 female 42.85 %. second groups of 21 stones of the same composition (Uric acid) with pulse energies of o.8, 1.2 and 1.2 J with repetition rate was 6, 8 and 10 Hz respectively for ureteric stone below 17 mm which comprised 13 male 61.9 % with 8 female 38.09 % Third group of 21 stones of the same composition (Struvite Stones) with pulse energies of o.8, 1.2 and 1.2 J with repetition rate was 6, 8 and 10 HZ respectively for ureteric stone below 16 mm which included 11 male 52.3 % with 10 female 47.61 % Conclusion: That Ho-YAG Laser lithotripsy of ureteral stones is an excellent treatment method, which is related to the period of time required for fragmentation with the type of stones and the different laser settings used.
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