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This study aims to evaluate changes in renal parenchyma following retrograde intrarenal surgery (RIRS) using shear-wave elastography. Renal elastography measurements will be performed in patients undergoing RIRS for kidney stones on the preoperative day, on the first postoperative day, and on the seventh postoperative day. Postoperative pain scores, perioperative outcomes, stone-free status and complications will also be assessed.
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| Label | Type | Description | Intervention Names |
|---|---|---|---|
| Aspiration-assisted ureteral access sheath | Experimental | Patients will undergo retrograde intrarenal surgery using an aspiration-assisted ureteral access sheath. |
|
| Standard ureteral access sheath | Active Comparator | Patients will undergo retrograde intrarenal surgery using a standard ureteral access sheath. |
|
| Name | Type | Description | Arm Group Labels | Other Names |
|---|---|---|---|---|
| Aspiration-assisted ureteral access sheath | Device | Patients undergoing retrograde intrarenal surgery using an aspiration-assisted ureteral access sheath |
|
| Measure | Description | Time Frame |
|---|---|---|
| Renal Cortical Shear-Wave Elastography Values (kPa) | Renal cortical stiffness will be quantitatively evaluated using ultrasound-based shear-wave elastography. Measurements will be obtained from multiple regions of the renal cortex, and the mean value of these measurements will be recorded in kilopascals (kPa). All examinations will be performed using the same ultrasound device and standardized protocol by a single experienced radiologist blinded to the study groups. | Elastography assessments will be performed preoperatively, on postoperative day 1, and on postoperative day 7 to evaluate perioperative renal parenchymal changes. |
| Measure | Description | Time Frame |
|---|---|---|
| Postoperative Complications | Perioperative and postoperative complications assessed according to the Clavien-Dindo classification system. | From surgery to postoperative day 30 |
| Serum Creatinine Level |
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Inclusion Criteria:
Exclusion Criteria:
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| Name | Role | Phone | Extension | |
|---|---|---|---|---|
| Cengiz Çanakcı | Contact | +905454738043 | cengizcanakci@hotmail.com |
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| ID | Term |
|---|---|
| D007669 | Kidney Calculi |
| ID | Term |
|---|---|
| D053040 | Nephrolithiasis |
| D007674 | Kidney Diseases |
| D014570 | Urologic Diseases |
| D052776 | Female Urogenital Diseases |
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| Standard ureteral access sheath | Device | Standard ureteral access sheath used during retrograde intrarenal surgery. |
|
Serum creatinine levels measured to evaluate renal function changes following retrograde intrarenal surgery.
| Preoperative baseline, postoperative day 1, and postoperative day 7 |
| Postoperative Fever and Sepsis | Occurrence of postoperative fever (>38°C) and/or sepsis following surgery. | From surgery to postoperative day 30 |
| Stone-Free Rate | Stone-free status assessed by postoperative imaging. | Postoperative month 1 |
| Renal Resistive Index | Renal resistive index values measured using Doppler ultrasonography to evaluate renal vascular resistance following retrograde intrarenal surgery. | Preoperative baseline, postoperative day 1 and postoperative day 7 |
| Mayo Adhesive Probability Score | Perinephric fat adhesion severity assessed using the Mayo Adhesive Probability (MAP) Score based on preoperative computed tomography findings. The MAP Score ranges from 0 to 5, with higher scores indicating a greater likelihood of adherent perinephric fat and increased surgical complexity. | Preoperative period |
| Postoperative Pain Scores | . Postoperative pain intensity was assessed using the Visual Analogue Scale (VAS), a 10-point scale ranging from 0 to 10, where 0 indicates no pain and 10 represents the most severe pain imaginable. Higher scores indicate greater pain intensity. | preoperative, postoperative 6th hour, and postoperative 24th hour. |
| D005261 |
| Female Urogenital Diseases and Pregnancy Complications |
| D000091642 | Urogenital Diseases |
| D052878 | Urolithiasis |
| D014545 | Urinary Calculi |
| D052801 | Male Urogenital Diseases |
| D002137 | Calculi |
| D020763 | Pathological Conditions, Anatomical |
| D013568 | Pathological Conditions, Signs and Symptoms |