When comparing both the intraoperative complications as well

as stone-free status, there was a difference between those patients with spinal abnormalities and those without. Of 90 URS performed for stones in normal anatomy patients, the stone-free rate was 61%, compared with 35.7% in patients with spinal deformities. There were 13 total complications (Satava grade I or II): 40% in spinal deformity patients compared with 6.1% in normal anatomy patients.

Conclusion: Spinal hardware and spinal deformities contribute to increased selleck complications and worsened stone-free rates during pediatric URS compared with pediatric patients with normal anatomy. Our experience with URS in patients with spinal deformities suggests it may not be as safe or efficacious as in the general pediatric population but it can still be used as a primary modality.”
“The effects of intramolecular N -> Si coordination and electronic and conformational factors on the chemical shift of Si-29 nucleus in silacyclobutane (siletane) derivatives were studied by quantum-chemical methods. Intramolecular coordination

induces upfield shift of the Si-29 resonance on the average by 50 ppm when the coordination number of the silicon atom increases by unity. The state of conformational equilibrium of siletane derivatives critically affects PKC412 datasheet the accuracy of delta(Si) predictions. DOI: 10.1134/S1070428013010077″
“Background: For the narrow ureter that will not accommodate a ureteroscope, it is common practice to place a ureteral stent, to allow subsequent ureteroscopy in the passively dilated ureter. Surprisingly, there are limited data on the effectiveness or safety of these maneuvers.

Methods: We retrospectively analyzed patients managed with ureteral stent placement followed by another attempt at ureteroscopy after an initial attempt of flexible ureteroscopy failed because the ureteroscope would not pass up an otherwise normal ureter.

Results: Of 41 patients with follow-up who underwent ureteral

stenting for this reason, the ureteroscope passed with ease poststenting in 29 (71%) and there was continued resistance in 12. Of these 12 patients, the ureteroscopy was continued despite resistance find more in 9, while another stent was placed in the remaining 3. Of these three patients, the third attempt at ureteroscopy was successful in two, and further attempts at ureteroscopy were not made after the third attempt failed in one. With a mean overall follow-up of 32 months, two patients (5%) developed ureteral strictures. Both were among nine patients in whom repeat ureteroscopy was performed despite resistance, with a rate of obstruction of 22% in this subgroup. Overall, ureteral stenting allowed successful ureteroscopy in 98% of patients.