An observational study in Kidney Calculi, sponsored by Malatya Governor Research Hospital. Not yet recruiting at 1 site in Turkey (Türkiye). Per ClinicalTrials.gov, last updated 2026-08-13.
Sponsored by Malatya Governor Research Hospital · Observational
Among 48 studies in Kidney Calculi with a site in Turkey — 21 open to participants now, 22 under way, none of them phase 3. Kidney Calculi · Turkey.
Among the 48 studies in Kidney Calculi with a site in Turkey, this one is the 10th largest by planned enrollment of the 13 observational ones, is one of 14 that started in 2026, is one of 13 observational ones, reaches primary completion later than 12 of the 21 other live ones, and was the 44th registered.
509 studies on the registry are indexed under Kidney Calculi; 146 are open to participants now.
This study's planned enrollment of 120 is below the median of 160 across 96 observational studies indexed under Kidney Calculi.
Browse Kidney Calculi studies →21 of the 48 studies in Kidney Calculi with a site in Turkey are open now, in 1 country. Each count lists the studies.
Of the 88 Kidney Calculi studies recruiting now, 48 (55%) set no upper age limit and 23 (26%) stop at 75 or younger; 6 take children under 18; 11 take healthy volunteers.
This study: all sexes · no healthy volunteers.
The full table on the hub →48 studies; the count open now beside each. This study's row is marked.
First in 2014; this study’s year is marked. 14 started in 2026.
Median enrollment 90 across the 35 interventional studies, 184 across the 13 observational. Of the 18 that completed or were terminated, 0 (0%) have results posted.
None of the 48 has an industry lead sponsor. The 10 most frequent:
This is the only study on the registry with Malatya Governor Research Hospital as lead sponsor.
Malatya Governor Research Hospital has 1 study filed under Kidney Calculi — fewer than ten, so there is no comparison to draw.
10 of the studies in Kidney Calculi with a site in Turkey that are under way reach primary completion within a year, 0 of them phase 3. Phase 3 first, then by date:
| Study | Primary completion |
|---|---|
| NCT07705646Sultan Abdulhamid Han Training and Research Hospital, Istanbul, TurkeyComparison of Different Ventilation Modes for Reducing Kidney Motion During Retrograde Intrarenal Surgery | 2026-11-15 |
| NCT07763600Malatya Governor Research HospitalEffect of Anesthesia Type on Surgeon Workload During Endoscopic Kidney Stone Surgery | 2027-01 |
| NCT07512297University of GaziantepPain Control During ESWL Using Non-Opioid Analgesics | 2027-01-01 |
| NCT07721571Hitit UniversityNephrostomy Tract Infiltration for Pain Control After PCNL | 2027-01-11 |
| NCT07736924Emrah Kızılay2D:4D Digit Ratio and Urinary Stone Disease | 2027-01-31 |
Among the 48 studies in Kidney Calculi with a site in Turkey, from their registry updates:
This prospective observational study aims to evaluate the association between anesthesia type and surgeon-perceived workload and surgical ergonomics in adult patients undergoing flexible ureteroscopy and retrograde intrarenal surgery (RIRS) for kidney stones. Patients will be classified according to the anesthesia administered during routine clinical care as general anesthesia or spinal anesthesia. The choice of anesthesia will be determined by routine clinical practice and the anesthesiology team and will not be assigned by the study protocol. Surgeon workload will be assessed immediately after surgery using the Surgery Task Load Index (SURG-TLX). Perioperative outcomes, including operative time, procedural characteristics, postoperative pain, complications, and stone-free status, will also be evaluated.
This is a prospective, single-center, observational study including adult patients undergoing elective flexible ureteroscopy and retrograde intrarenal surgery (RIRS) for kidney stones. Eligible patients will be enrolled consecutively. No intervention regarding the type of anesthesia or surgical technique will be assigned by the study protocol. The anesthesia technique will be selected according to routine clinical practice and the assessment of the anesthesiology team. Patients will subsequently be categorized into two observational groups: those receiving general anesthesia and those receiving spinal anesthesia.
All RIRS procedures will be performed according to standard clinical practice. Surgical steps, including the use of a ureteral access sheath, lithotripsy technique, energy source, and placement of a ureteral stent, will be determined by the treating surgeon and will not be modified for research purposes.
The primary outcome will be surgeon-perceived intraoperative workload assessed using the Surgery Task Load Index (SURG-TLX). The SURG-TLX evaluates six domains: mental demands, physical demands, temporal demands, task complexity, situational stress, and distractions. The questionnaire will be completed by the surgeon within 15-30 minutes after completion of the procedure. Individual domain scores and the overall SURG-TLX score will be recorded.
Secondary outcomes will include operative duration, fluoroscopy time or dose when available, use of a ureteral access sheath, ureteral stent placement, intraoperative complications, postoperative complications, postoperative pain and analgesic requirement, stone-free status, and the need for additional intervention. Preoperative demographic and clinical characteristics, including age, sex, body mass index, ASA classification, comorbidities, stone characteristics, hydronephrosis, and relevant preoperative clinical data, will also be recorded.
The main analysis will compare SURG-TLX scores between the general anesthesia and spinal anesthesia groups. Potential confounding variables related to patient characteristics, stone burden, procedural factors, and operative characteristics will be considered in adjusted analyses.
Adult patients with kidney stones who are scheduled to undergo elective flexible ureteroscopy and retrograde intrarenal surgery (RIRS) at the study center and meet the predefined eligibility criteria.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Exclusion Criteria:
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Patients undergoing flexible ureteroscopy and retrograde intrarenal surgery (RIRS) under general anesthesia as determined by routine clinical practice and the anesthesiology team. General anesthesia will not be assigned by the study protocol.
Procedure: General Anesthesia (GA)
Patients undergoing flexible ureteroscopy and retrograde intrarenal surgery (RIRS) under spinal anesthesia as determined by routine clinical practice and the anesthesiology team. Spinal anesthesia will not be assigned by the study protocol.
Procedure: Spinal Anesthesia (SA)
Exposure to general anesthesia during routine RIRS. The anesthesia technique is selected according to routine clinical practice and anesthesiology assessment and is not assigned by the study protocol.
Exposure to spinal anesthesia during routine RIRS. The anesthesia technique is selected according to routine clinical practice and anesthesiology assessment and is not assigned by the study protocol.
Total Weighted Surgery Task Load Index (SURG-TLX) Score
Surgeon-perceived workload will be assessed using the original weighted Surgery Task Load Index (SURG-TLX). The instrument includes six domains: mental demands, physical demands, temporal demands, task complexity, situational stress, and distractions. Domain weights are determined through 15 pairwise comparisons, yielding a weight from 0 to 5 for each domain. Each domain is then rated on a 20-point scale. The weighted workload score for each domain is calculated by multiplying the domain weight by its rating, resulting in a score from 0 to 100. The six weighted domain scores are summed to obtain the total SURG-TLX workload score, with higher scores indicating greater perceived surgical workload. The total weighted SURG-TLX score ranges from 0 to 300, with higher scores indicating greater perceived surgical workload.
Time frame: Within 15-30 minutes after completion of the surgical procedure
Weighted SURG-TLX Domain Scores
The six SURG-TLX domains (mental demands, physical demands, temporal demands, task complexity, situational stress, and distractions) will be analyzed separately. For each domain, the weight derived from the 15 pairwise comparisons (0-5) will be multiplied by the corresponding rating on the 20-point scale, yielding a weighted domain score ranging from 0 to 100. Higher scores indicate greater workload in the respective domain.
Time frame: Within 15-30 minutes after completion of the surgical procedure
Operative Duration
Operative duration will be recorded in minutes from the routine intraoperative records and compared between the general anesthesia and spinal anesthesia groups.
Time frame: During the surgical procedure
Postoperative Pain Intensity
Postoperative pain intensity will be assessed using a Visual Analog Scale (VAS), with higher scores indicating greater pain intensity. Scores will be compared between the general anesthesia and spinal anesthesia groups.
Time frame: Within the first 2 hours after surgery
Intraoperative Complications
The occurrence of intraoperative complications during flexible ureteroscopy and RIRS will be recorded from routine operative records and compared between the general anesthesia and spinal anesthesia groups.
Time frame: During the surgical procedure
Postoperative Complications
Postoperative complications, including fever, sepsis, hematuria, and other procedure-related adverse events, will be recorded and classified according to the Clavien-Dindo classification. The incidence and severity of complications will be compared between the general anesthesia and spinal anesthesia groups.
Time frame: Within 30 days after surgery
Stone-Free Status
Stone-free status will be assessed during routine postoperative follow-up using the imaging modality applied in standard clinical care (e.g., ultrasonography, kidney-ureter-bladder radiography, or computed tomography) and compared between the general anesthesia and spinal anesthesia groups.
Time frame: At routine postoperative follow-up
Plan to share: No — Individual participant data will not be publicly shared due to participant confidentiality and institutional data protection considerations.
Start is estimated for Sep 2026; primary completion for Jan 2027, 4 months later.
Of 39 observational studies under Kidney Calculi, half reached primary completion within 42 months of starting (the median), counting those still running; a quarter within 14 and three quarters within 52. This study's planned 4 months is below that.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.
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