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A K Chepurov

Publications and source records attributed to A K Chepurov.

61 records · Page 4Linked to original sources
PubMedDate not supplied

[The Ho-YAG laser in surgical urology].

Ho-YAG laser (Medoptotech) operates in impulse regimen with transmission of radiation along the fiber 400-600 microns in diameter (mean power 12 W, impulse rate 1-15 Hz, energy of 1 impulse 0.7-1.5 J, its duration 300 microseconds. These parameters provide the effect of intensive biotissue evaporation, dissection of contact tissue, disintegration of concrements, hemostasis. Ho-YAG laser was employed for treatment of 8 patients with urethral polyp, 4 with stricture of the bladder neck and urethra, 5 with prostatic adenoma, 12 with bladder tumor, 10 with ureterolith, 5 with uroliths, 4 with penile lesions, 2 with ureteral stricture, 4 with ureterocele. Ho-YAG laser was used primarily for endoscopic interventions. Its use for open surgery is also promising. Further practical experience with Ho-YAG laser will provide additional information on its indications in urological diseases.

Adult↗
PubMedDate not supplied

[The holmium laser in the treatment of bladder cancer patients].

37 patients with cancer of the urinary bladder have undergone surgery and radiation with Ho-YAG laser. In 11 patients transurethral resection was followed by bladder wall ablation by impulse laser radiation (0.5-1.0 W, 3-10 Hz). Pilot results were promising: good coagulation effects, absence of secondary hemorrhage and infectious-inflammatory complications due to shorter postoperative drainage of the bladder and safety of ablation effect in exposure of the tumor base.

Adult↗
PubMedDate not supplied

[The use of the holmium laser for treating strictures of the urethra and bladder neck in men].

30 patients with strictures of the urethra (n = 19) and bladder cervix (n = 11) received combined treatment including surgical endoscopic correction of the stricture with Ho:YAG laser, pre- and postoperative endourethral radiation with low-energy laser, instillations of collagenase and dimexide solution into the urinary tract. The operation was made by Ho:YAG laser (2.09) microns, 4 J, 15 Hz, 300 mc). Persistent response for 10-12 months was achieved in 93.3% of patients.

Adult↗
PubMedDate not supplied

[The holmium laser in the endoscopic treatment of ureteral strictures].

The introduction of Ho-YAG laser created new opportunities for treatment of urological diseases. The authors used the unit CTH-10 (wavelength 2.09 mu, energy of impulse 0.7-1.5 J, frequency 1-15 Hz). 7 endoscopic corrections of the strictures were performed in 6 females using cutting and ablation properties of Ho-YAG laser (0.5 J, 5-10 Hz). The patency of the urinary tract was restored by dissection through all layers of the scar tissue in 5 females with strictures 0.5-12 cm. Ablation of the scar tissue was used in 1 patient with stricture of the low ureter 0.3 cm. In all the cases surgery ended with establishment of the ureteral stent. Control examinations showed satisfactory results in 5 patients. In one case nephrectomy was demanded. Better conditions for surgery were provided in the presence of nephrostomy drainage.

Adult↗
PubMedDate not supplied

[Endoscopic ureterolithotripsy with the holmium laser].

One of the clinical and experimental investigations performed in the urological clinic of the Moscow Medical University and Research Institute of Urology aimed at elucidation of Ho-YAG-laser potential in endoscopic lithotripsy (EL). Russian Ho-YAG laser surgical units CTH-10 and LLT-3 with wave length 2.09 mu were employed. The studies showed that the developed laser units satisfied relevant medical and technical requirements. Low depth of laser impulse penetration (0.4 mm) obtained at EL warrants safety of the adjacent tissues which is essential in crushing fixed ureteroliths in the presence of severe inflammation in the ureteral wall. The conclusion is made that Ho-YAG laser EL is an effective treatment of ureteroliths. Further tests for EL efficacy in affections of the upper urinary tracts are advocated to define a proper place of EL in endoscopic urology.

Evaluation Studies as Topic↗
PubMedDate not supplied

[Diagnosis of the "valve effect" of the middle lobe of prostate in benign prostatic hyperplasia and choice of the treatment method].

As there are still no accurate criteria of assessing middle-lobe prostatic benign hyperplasia contribution through the "valve effect" to development of infravesical obstruction, the authors propose to introduce "miction" transrectal ultrasonic study. This study provides evidence allowing to divide patients with middle-lobe prostatic benign hyperplasia into three groups by the degree of the "valve effect". This enables differential approach to choice of the scope of the operative intervention.

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