“Stoneless” or Negative Ureteroscopy: A Reality in the Endourologic Routine or Avoidable Source of Frustration? Estimating the Risk Factors for a Negative Ureteroscopy

Abstract

Female gender, a nonradio-opaque stone at KUB, and a smaller stone surface were statistically significantly different in the Negative-URS population.

‘Negative ureteroscopy’ for stone disease: Evidence from a systematic review

“…1). Eight full-text articles were obtained and finally 4 studies (1336 patients) were selected for our review [17][18][19][20]. These studies were published from 2011 to 2018, covering URS procedures carried out between 2003 and 2015.…”

“…Kreshover et al, however, did not find sex to be a significant predictive factor for negative URS [20]. Katafigiotis and colleagues also found that non-radiopaque stones significantly predicted negative URS (OR 11.11; CI 2.51, 49.20; p = 0.002) [17]. They used a multivariate model which combined stone length, surface area, volume, and width on CT scan and found that smaller size significantly predicted negative URS (AUC 0.95; CI 0.92-0.97; p < 0.0001).…”

“…Female gender was a significant predictor in two studies [17,18]. Katafigiotis et al found that female sex significantly predicted negative URS (OR 6.80; CI 1.56, 29.70; p = 0.011) [17]. Lamberts et al also found that female sex significantly predicted negative URS (OR 1.41; CI 1.25, 1.58; p < 0.05) [18].…”

“…None of the studies found age to be a significant factor for negative URS. Female gender was a significant predictor in two studies [17,18]. Katafigiotis et al found that female sex significantly predicted negative URS (OR 6.80; CI 1.56, 29.70; p = 0.011) [17].…”

“…The negative URS rate varied from 3.9 to 13.7% (Table 1) [17][18][19][20]. Three studies investigated potential predictive factors for a negative URS (Table 2) [17,18,20]. None of the studies found age to be a significant factor for negative URS.…”