title: [Role of radiographic signs of urinary calculi in the effectiveness of extracorporeal shock-wave lithotripsy].
abstract: The value of X-ray signs of urinary calculi for the efficiency of shock-wave teletripsy (SWTL) was assessed in 188 patients with nephro-ureterolithiasis. The calculi were studied from the general X-ray film by means of a routine 4-5x magnifier. All the patients were divided into 2 groups. Group 1 comprised patients with effective SWTL, i.e. those undergone 1 or rarely 2 sessions. Group 2 included those with low effective SWTL, 2-4 sessions. Comparative analysis of X-ray films indicated that the calculi which were homogeneous in structure, moderate in intensity and had even edges in the general X-ray pictures in 154 (82%) cases were fragmented after 3-4 sessions (the average number of impulses were 7500, at 19.0 kV). With their heterogeneous structure, low and high intensity, irregular rough edges, they were fragmented after 1 or rarely 2 sessions in 34 (18%) patients. The number of impulses was fewer, on an average of 2300, the voltage was less -17.5 kV. It was noted that the pattern of the edges of a calculus and its geometric form are of highly value in the prediction of SWTL. Calculi having even edges were more frequently encountered in patients from Group 2 (in 81.1% of cases), but in patients of Group 1 they were only in 18.1%.
authors.forename: V M
authors.initials: VM
authors.lastname: Perel'man
authors.forename: V N
authors.initials: VN
authors.lastname: Stepanov
authors.forename: Z A
authors.initials: ZA
authors.lastname: Kadyrov
mesh_terms: D000328:Adult; D002769:Cholelithiasis / Q000000981:diagnostic imaging* / Q000628:therapy*; D005260:Female; D006801:Humans; D008096:Lithotripsy; D008297:Male; D008875:Middle Aged; D011379:Prognosis; D011859:Radiography