Active clinical trials for "Urolithiasis"

Urinary calculi have become a global public health problem, which brings a huge economic burden to society and individuals. The pathogenesis of urinary calculi is not completely clear. Supersaturation of urinary components is a necessary condition for the formation of urinary calculi. The causes of stone formation are closely related to diet, drugs, metabolic disorders, basic diseases, genetic factors, environment and so on. Diet essentially determines the composition of urine, which affects the formation of urinary calculi. The effect of dietary phosphorus intake on stones is not clear. There is a lack of data to support dietary phosphorus as an influencing factor of stone formation. Phosphorus is present in most foods. 24h urine composition analysis is of great value in predicting the occurrence and composition of urinary calculi. However, due to the interaction between urine components, a single urine component can not well predict the occurrence of stones. Therefore, the researchers introduced the relative supersaturation of common stone components in urine to predict the incidence of stones. Therefore, we want to give healthy adults a diet with different phosphorus content for a period of time to clarify the effect of phosphorus in the diet on 24h urine composition level and urine relative supersaturation, so as to further explore the relationship between dietary phosphorus and the incidence of urinary calculi. To provide more clear recommendations for early prevention of urinary calculi, and provide more evidence for clinical decision-making, thereby reducing the incidence rate of urinary calculi.

The purpose of this study is to add to the investigators' quest to understanding stone disease, by evaluating the metabolites excretion in urine and its relation to microflora present in the stool.

To Compare the safety and efficacy of PNL in a modified flank-free supine position versus prone position in pediatric patients

Randomized comparison of patient outcomes following standard PCNL versus mini-PCNL.

This is a prospective randomized controlled trial designed to assess the differences in postoperative symptoms related to placement of a 6Fr Percuflex ureteral stents, 6Fr Tria ureteral stents, and 4.8Fr Tria ureteral stents after ureteroscopy with laser lithotripsy for treatment of upper tract urinary stones. 192 participants will be enrolled and will be on study for up to approximately 10 weeks.

Aim is to study if 1 week of pre operative tamsulosin would enable easier insertion of ureteral access sheath in primary retrograde intrarenal surgery for renal stone disease

The purpose of this research study is to assess the efficacy of ingesting a small amount of the harmless bacterium Oxalobacter formigenes in establishing residence in the guts of human subjects and to determine whether this influences the oxalate passed in urine of healthy volunteers.

The purpose of the study is to investigate whether the use of gentamicin-based irrigation fluid during ureteroscopy decreases the risk of UTIs and other post-operative infections after surgery.

Current prevention strategies in patients with recurrence of kidney stones show especially in high-risk patients a diversely and in the long-term not successful outcome in a sustainable number of cases. Recent studies have revealed that Dapagliflozin has the potential to decrease risk and incidence of urolithiasis events especially in patients suffering from Diabetes. The investigators propose that Dapagliflozin has the potential to increase the metabolic situation of hyperoxaluric patients with recurrence of urolithiasis. The investigators therefore test whether Dapagliflozin can decrease the oxalate excretion compared to the current strategy with Hydrochlorothiazide. The study may open up a new way of preventing urolithiasis in patients with high-risk of recurring urolithiasis.

The aim of this study is to assess the quality of life (QoL) in pediatric patients with urinary stone disease.