Active clinical trials for "Kidney Calculi"

The purpose of this study is to assess whether certain beverages can increase urinary citrate levels in healthy individuals with no history of kidney disease.

Percutaneous nephrolithotomy (PCNL) is a well-established treatment modality for renal stones. It offers a high stone free rates and less invasive than open surgery. Nevertheless PCNL is an invasive and technically demanding procedure with inherent risks and complications. The most troublesome morbidities are bleeding and injury to the kidney and its adjacent structures. Complications of PCNL tend to be associated with the accuracy of tract placement and the size of the nephrostomy tract. To improve the safety of PCNL, there is a trend toward using smaller and smaller nephrostomy tracts . With the smaller nephrostomy tract, there also arise the problems of compromised visual field and increased difficulty in stone extraction. Increase irrigation using pressure pump might improve the visualization and the passive egress of the stone fragments, but it also may concomitantly increase the intra-luminal pressure. The present system of Super-Mini percutaneous nephrolithotomy (SMP) was developed to address many of these deficiencies. The basic components of SMP system are an 8.0 F miniaturized nephroscope with a newly designed irrigation-suction sheath with enhanced irrigation capability and modified nephrostomy sheath with continuous negative pressure aspiration. Its design was intended not only to prevent the excessive intrarenal pressure but also improve the visualization and the stone fragments extraction. Little was known about renal pelvic pressure in vivo during SMP and about any correlation it might have had with postoperative fever and urosepsis. We measure the renal pelvic pressure during SMP to determine whether it will improve the renal pelvic pressure and improve the incidence of postoperative fever.

Background/Rationale for the study: Lithiasis pathology is increasingly common because of the change in our lifestyle and our food. Thus, we hold a prevalence for urinary lithiasis 10% in France currently including 13% of the male population and 6% of the female population. The formation of urinary lithiasis is the result of a complex mechanism involving factors anatomical and infectious metabolics. They are classified according to their size, topography and composition. The treatment of urinary lithiasis has changed dramatically in recent years. The recommendations of the French Urology Association (AFU) for the management of kidney stones and ureteral of the adult of 2004 give a certain place to the treatment by extracorporeal lithotripsy (ECL). The ELC is indicated for the first purpose for lithiasis ureteral or renal lithiasis of less than 20 mm, whether or not associated with the setting up of a JJ stent. For kidney stones of more than 20 mm or complex or Coralliformes, the ECL can be associated with treatment with percutaneous nephrolithotomy. In addition, the ECL is indicated in case of residual cholelithiasis 3 months after a first treatment whatsoever. It is found, as the main complication of the ECL, a risk of the appearance of Hematomas under capsular, peri-renal and intra-parenchymatous. Its prevalence is estimated to be between 6.2% and 13% according to studies. ACETYLSALICYLIC ACID less or equal to 250 mg is the usual dosage of aspirin (for the adult), the Marketing Autorisation recognises in secondary prevention after a first myocardial or cerebral ischemic attack related to atherosclerosis. It entrains a reduction mortality and morbidity of cardiovascular causes. Acetylsalicylic acid is currently being stopped 5 to 7 days before the ECL. The interest of maintaining the Acetylsalicylic acid is: A simplification of the management of patients under on acetylsalicylic acid below (or equal to) 250 mg (No modification of Treatment to be implemented) A cardiovascular risk decreased by maintaining their initial treatment without any modification. Main objective: Evaluation of the proportion of renal hematoma during the production of Lithotripsy for renal lithiasis, on a 15-day scan, in patients under on acetylsalicylic acid below (or equal to) 250 mg not stopped Secondary objectives: Evaluation of the efficacy of treatment with lithotripsy (Stone free, fragments Minimal residuals) Evaluation of the proportion of hematuria macroscopic post lithotripsy in Patients under on acethylsalicylic acid not stopped. Evaluate the rate of post-ECL complications requiring treatment, Analgesic, obstructive pyelonephritis. Evaluate post-ECL pain due to hematoma or lithiasis migration Evaluation of the evolution of renal function post session of Lithotripsy on the patients under acethylsalicylic acid not stopped. Type of Study: Interventional study, prospective, mono centric, single-arm

To investigate the effectiveness of percutaneous nephrostomy catheter placement versus retrograde double J catheter placement in patients with symptoms of obstructive kidney disease (with either infection and/or pain and/or kidney function deterioration) caused by urolithiasis.

In patients undergoing RIRS for kidney stone, we aim to show the effect of single lung ventilation with a double lumen tube on operative (operation scope duration, perforation, hemorrhage, etc. complications) and postoperative parameters (stone-free rates, complications like postoperative hemorrhage and fever, hospital stay, etc.) and to show changes in renal stone position during simultaneous normal ventilation and single lung ventilation.

The purpose of the study is to investigate the impact of ureteral stents on the functioning of ureteral peristalsis (normal contractions in the ureteral organ muscle).

In clinical practice, many patients are not able to modify their habits to achieve a high level of diuresis and fluid intake and therefore are at an elevated risk for stone recurrence. The investigators think that Ure-Na (osmotic agent) taking could help to increase urine volume and decrease urine concentration, which would be of benefit in the prevention of kidney stones.

Retrograde intrarenal surgery (RIRC) is used as standard treatment for stones less than 2 cm. In some cases, the ureteral access sheath cannot be placed due to ureteral stricture. In this case, a double j stent (DJ) is placed to passively dilate the ureter, and the RIRC is postponed for post-dilatation. The aim of the study is to determine the optimal time for RIRC operation in cases where a double j stent was placed for passive dilatation.

The aim of this research is to use a controlled laboratory setting to determine whether bacteria isolated from kidney stones of patients play a role in the formation of non-infectious kidney stones. It is well known that struvite stones are associated with active bacterial infection, however the role of bacteria in the formation of non-infection stones (like calcium oxalate) is not well characterized and there are theories that bacteria are involved in the making of these stones.

We want to serach the relationship between the pain degree and stone localisation in kidney in Retrograde intrarenal surgery