Active clinical trials for "Nephrolithiasis"

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.

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

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.

The objective of the this study was to examine the amount and duration of tea consumption in relation to the risk of renal stone disease.

There is no consensus about the required time intervals between repeated SWL sessions applied for renal stones with some centers waiting for 3 days, others for one week and others up to one month to repeat lithotripsy. In the 2019 EUA guidelines stated that "There are no conclusive data on the intervals required between repeated SWL sessions. However, clinical experience indicates that repeat sessions are feasible (within 1 day for ureteral stones). The intense use of ESWL currently, the lack of knowledge about acute lesions caused by re-treatment within a short time interval and the empirical way by which treatment is conducted, stimulated us to search for a precise answers to the question What the ideal time interval between SWL sessions in the treatment of renal stone patients should be. This randomized controlled trial will be conducted at Urology and Nephrology Center in Mansoura, Egypt. Patients more than 18 years old with single primary renal stone fulfilling inclusion criteria will be randomly allocated to 3 groups (50 patients each).Group 1 will undergo SWL with 3 days between each session. Group 2 will undergo SWL with 7 days between each session and Group 3 will undergo SWL with 14 days between each session. Study parameters will be renal damage including the following items: Tubular damage will be assessed through estimation of changes in urinary excretion of renal tubular enzyme kidney injury molecule 1(KIM-1). Glomerular damage will be assessed by estimation of proteinuria and changes in GFR calculated by renal isotope scan. Renal morphological and haemodynamic changes. Treatment success is defined as clinically insignificant residual fragments less than 4 mm size.

Kidney stones vary in size from a tiny grain of sand to as large as filling the inside of the kidney. Treatment decisions depend on the size, location, and composition of the stone. Some kidney stones can be treated with lithotripsy (breaking up stones inside the body with shock waves created outside the body) or ureteroscopy (placing a small telescope up the urine channel to remove the stone). When stones are large in size or in the lower part of the kidney, a percutaneous (making a passage from the back into the kidney) procedure has been found to be the best method to remove the stones safely and efficiently. A passage is made into the back to allow a small telescope to see the stone and break it into fragments for removal. A small catheter is placed at the end of the procedure to allow the kidney to drain. The purpose of this study is to record information about your surgery into a database so we can look at how patients who have had this procedure have done over time. We hope that reporting the outcomes of this surgery will be helpful to urologists and patients in the future. There may be certain factors that can be identified through this study as having better outcomes that may help make future surgeries safer.

Retrograde intrarenal surgery (RIRS) with flexible ureteroscopy is based on video monitoring of urinary tract during operation. Therefore, shaking vision on monitor can bother surgeons and make them tired. This can lead in tissue injury from lasing. The purpose of this study is to investigate the stability of monitoring of surgical field which is assessed by surgeon.

The purpose of this study is to define the cause of renal stones and the risk pattern for recurrence of renal stones episodes (any kind of stones) in HIV1 patients.

Telerounding is the use of wireless remote video-confrencing to assess hospitalized patients. Physicians thus rely on all ususal data collected during bedside rounds with the exeption of a direct physical exam. The intention of this study is to determine if post-operative morbidity can be identified in an accurate and timely manner.

Kidney stones cause severe pain. Patients with a stone lodged in the ureter (the tube that drains the bladder), require urgent treatment with a stent to relieve the blockage. This tube, or ureteral stent, gives the patient relief until they can have their stone treated. This study is to evaluate a new type of ureteral stent to relieve pain from kidney stones. This stent is designed to drain the kidney and unlike other ureteral stents, is also designed to widen the ureter to help the stone pass on its own.