UrolithiasisNCT05297331
Renal Stone Treatment Global Registry
An observational study of Urolithiasis, run by Chinese University of Hong Kong at 3 sites in Hong Kong.
Trial summary
This is an international prospective data registry to assess the treatment outcomes and complications of different treatment approaches for different surgical treatment of urolithiasis. Read more about this study
- Who is it for?
- Ages 18 years and older
- Conditions the study is for
- Urolithiasis
- How many people
- 3,000 participants
- Where
- 3 sitesHong Kong
- Study dates
- 1 Mar 2022to 31 Mar 2033
- How long will I take part?
- 1 Year
- Phase
- Observational
- Are there results?
- Not yet: the study is under way
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 years and older
- All sexes
- No healthy volunteers
- Adult, Older adult
Study population: Patients diagnosed with urinary stones and planned for surgery (including shockwave lithotripsy, ureteroscopy, percutaneous nephrolithotomy (PCNL), laparoscopic ureterolithiasis, open stone procedures etc) in the hospitals will be identified and then enrolled to the study.
Who may be able to join
- Patient at the age of 18 or above
Who cannot join
- Patient is unable to give consent
Trial locations and contacts
3 sites in 1 country. Contact the study team or a site near you to ask about taking part.
Hong Kong3 sites, 3 recruiting
- Recruiting
Alice Ho Miu Ling Nethersole Hospital
Hong Kong
Chi Fai NG, MD, 35052625, ngcf@surgery.cuhk.edu.hk
- Recruiting
Prince of Wales Hospital
Shatin
Chi Fai NG, MD, 3505 2625, ngcf@surgery.cuhk.edu.hk
- Recruiting
North District Hospital
Sheung Shui
Chi Fai NG, MD, 3505-2625, ngcf@surgery.cuhk.edu..hk
About this study
Official title: A Prospective Assessment of the Perioperative Parameter and Treatment Outcomes of Urinary Calculi - International Registry
This is an international prospective data registry to assess the treatment outcomes and complications of different treatment approaches for different surgical treatment of urolithiasis.
Read the detailed description
Renal stone is a common condition, and many patients suffered from recurrent diseases and required multiple interventions in their lifetime. Currently, there are many treatment options available for stone treatment, including shockwave lithotripsy, ureteroscopy, percutaneous nephrolithotomy etc.
Different treatment approaches will result in different treatment successful rate and also potential adverse effects to patients. The main challenge for stone management is the decision on the best treatment approach for individual stone of each patient. This is because for the same type of stone (such as lower caliceal stone or upper ureteric stone), different surgical treatment could be applied. The decision will depend on various patients (such as age, premorbid etc.) and stone factors (such as size, density etc) and also patients' preference.
New advances in technology have improved treatment outcomes for urolithiasis, such as single use flexible ureteroscopes, flexible and navigable ureteral access sheaths (FANS), direct in scope suction (DISS), intrarenal pressure (IRP) and intrarenal temperature (IRT) monitoring devices, new lasers and pulse modulation, etc.
Therefore, in order to have more information to guide treatment decision during discussion with patients, a prospective data registry is created to assess the treatment outcomes and complications of different treatment approaches in our hospital clusters. This information will be important for audit, treatment comparison and also patient education.
- Conditions
- Urolithiasis
- Keywords
- Urolithiasis, ESWL, RIRS, flexible ureteroscopy, PCNL, FANS, flexible and navigable suction ureteral access sheath, intrarenal pressure, IRP, intrarenal temperature, IRT
- Medical subject headings
- Urolithiasis
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| FLEXOR-FANS (flexible and navigable suction ureteral access sheath) | Cohort of flexible ureteroscopy with flexible and navigable suction ureteral access sheath (fURS FANS) will be studied | |
| DISS (Direct in scope suction) | Cohort of flexible ureteroscopy with direct in scope suction (DISS) will be studied | |
| Flexible ureteroscopy - IRP / IRT | Cohort of flexible ureteroscopy with and without real-time intrarenal pressure (IRP) monitoring and/or intrarenal temperature (IRT) will be studied | |
| Shockwave lithotripsy (SWL) | Cohort of extracorporeal shockwave lithotripsy (SWL) will be studied | |
| Percutaneous nephrolithotomy (PCNL) | Cohort of percutaneous nephrolithotomy with or without intrarenal pressure and temperature monitoring will be studied. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Target Stone status
stone free rate
Measured: postoperative, at 1 and/or 3 months
Secondary outcomes (4)
Intraoperative parameters
Including irrigation and suction and laser settings and devices, laser consumption and efficacy, fluoroscopy dosage and time, equipment (ureteral access sheath size and lengths, ureteroscopy sizes, stone basket) utilised; exit strategy; intraoperative complications if noted; ergonomics
Measured: intraoperative
Treatment related complication
The 30-day complications will be graded according to the Clavien-Dindo classification
Measured: Thirty days after the operation
Recurrence of stone
Stone recurrence rate
Measured: At 12 months
QOL and pain scores
Pain VAS scores and QOL assessment
Measured: preoperative, postoperative on day 0 and at follow up
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted28 Mar 2022
- Study start1 Mar 2022
- Primary completion31 Dec 2032 (estimated)
- Study completion31 Mar 2033 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (15)Papers the sponsor has linked to this study.
- Other trials for UrolithiasisStudies of the same condition, open and under way.
- More trials run by Chinese University of Hong KongThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 3,000 participants (estimated)
- Target duration
- 1 Year
Sponsor and investigators
- Lead sponsor
- Chinese University of Hong Kong
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, NG Chi Fai, Chinese University of Hong Kong
- Investigators
- Chi Fai NG, MD, Principal investigator, Chinese University of Hong Kong
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT05297331
- Sponsor's protocol ID
- CRE-2021.684
- Status last verified
- Oct 2026
- First submitted
- 9 Mar 2022
- Last updated
- 22 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Publications
Gauhar V, Traxer O, Fong KY, Sietz C, Chew BH, Bin Hamri S, Gokce MI, Gadzhiev N, Yuen SKK, Malkhasyan V, Ragoori D, Tanidir Y, Somani BK, Castellani D. Comparing Thulium Fiber Versus High-Power Holmium Laser Lithotripsy Combined with the Flexible and Navigable Suction Access Sheath in Flexible Ureteroscopy for Kidney Stone Disease: A Propensity Score Matched Analysis by the Global FANS Collaborative Group. J Endourol. 2025 Jan;39(1):42-49. doi: 10.1089/end.2024.0653. Epub 2024 Dec 16.
PubMed 39676748Yuen SKK, Zhong W, Chan YS, Castellani D, Bhojani N, Agarwal MS, Tokas T, Croghan S, Jung H, Herrmann T, Somani B, Gauhar V; Global Research on Intra-renal Pressure Collaborative Group. Current utility, instruments, and future directions for intra-renal pressure management during ureteroscopy: scoping review by global research in intra-renal pressure collaborative group initiative. Ther Adv Urol. 2025 Jan 31;17:17562872251314809. doi: 10.1177/17562872251314809. eCollection 2025 Jan-Dec.
PubMed 39896048Zhu W, Yuen SKK, Cao J, et al. Intrarenal pressure monitoring via flexible and navigable suction ureteral access sheath in retrograde intrarenal surgery: A preclinical animal study and a pilot clinical study. Clinical and Translational Discovery. 2025;5:e70031doi:10.1002/ctd2.70031
Nedbal C, Yuen SKK, Akram M, Keller EX, Martinez BB, Philip J, Emiliani E, Li JKM, Stracci D, Gauhar V, Castellani D, Somani BK. First clinical evaluation of a flexible digital ureteroscope with direct in scope suctioning system (Pusen DISS 7.5Ch): prospective multicentric feasibility study. World J Urol. 2024 Oct 3;42(1):560. doi: 10.1007/s00345-024-05275-9.
PubMed 39361036Gauhar V, Traxer O, Castellani D, Sietz C, Chew BH, Fong KY, Hamri SB, Gokce MI, Gadzhiev N, Galosi AB, Yuen SKK, El Hajj A, Ko R, Zawadzki M, Sridharan V, Lakmichi MA, Corrales M, Malkhasyan V, Ragoori D, Soebhali B, Tan K, Chai CA, Tursunkulov AN, Tanidir Y, Persaud S, Elshazly M, Kamal W, Tefik T, Shrestha A, Tiong HC, Somani BK. Could Use of a Flexible and Navigable Suction Ureteral Access Sheath Be a Potential Game-changer in Retrograde Intrarenal Surgery? Outcomes at 30 Days from a Large, Prospective, Multicenter, Real-world Study by the European Association of Urology Urolithiasis Section. Eur Urol Focus. 2024 Dec;10(6):975-982. doi: 10.1016/j.euf.2024.05.010. Epub 2024 May 24.
PubMed 38789313Yuen SKK, Traxer O, Wroclawski ML, Gadzhiev N, Chai CA, Lim EJ, Giulioni C, De Stefano V, Nedbal C, Maggi M, Sarica K, Castellani D, Somani B, Gauhar V. Scoping Review of Experimental and Clinical Evidence and Its Influence on Development of the Suction Ureteral Access Sheath. Diagnostics (Basel). 2024 May 16;14(10):1034. doi: 10.3390/diagnostics14101034.
PubMed 38786332Talyshinskii A, Tzelves L, Ventimiglia E, Yuen SKK, Gauhar V, Traxer O, Somani B. Technological innovation and revolution with single-use digital flexible ureteroscopes: a review from section of EAU Endourology. Curr Opin Urol. 2025 Jul 1;35(4):360-367. doi: 10.1097/MOU.0000000000001260. Epub 2025 Jan 7.
PubMed 39774241Gauhar V, Somani BK, Seitz C, Castellani D, Tefik T, Persaud S, Ragoori D, Gauhar V, Tan K, Lakmichi MA, Gadzhiev N, Malkhasyan V, Kamal W, Tanidir Y, Chai CA, Tursunkulov AN, Farahat Y, Keller EX, Chew BH, Herrmann T, Traxer O, Yuen SKK. A Global Survey to Assess Urologists' Attitudes Towards Suction Technology in Endourology by the European Association of Urology Section of Endourology and Progressive Endourological Association for Research and Leading Solutions. Urology. 2025 Mar;197:42-50. doi: 10.1016/j.urology.2024.12.009. Epub 2024 Dec 16.
PubMed 39674378Chan SW, Ng CF, Man CW, Chung R, Li SK. A report on a randomly sampled questionnaire survey about renal stone disease in Hong Kong. Hong Kong Med J. 2008 Dec;14(6):427-31.
PubMed 19060340Taguchi K, Cho SY, Ng AC, Usawachintachit M, Tan YK, Deng YL, Shen CH, Gyawali P, Alenezi H, Basiri A, Bou S, Djojodemedjo T, Sarica K, Shi L, Singam P, Singh SK, Yasui T. The Urological Association of Asia clinical guideline for urinary stone disease. Int J Urol. 2019 Jul;26(7):688-709. doi: 10.1111/iju.13957. Epub 2019 Apr 24.
PubMed 31016804Li JK, Teoh JY, Ng CF. Updates in endourological management of urolithiasis. Int J Urol. 2019 Feb;26(2):172-183. doi: 10.1111/iju.13885. Epub 2018 Dec 21.
PubMed 30575154Ng CF. The effect of age on outcomes in patients undergoing treatment for renal stones. Curr Opin Urol. 2009 Mar;19(2):211-4. doi: 10.1097/mou.0b013e32831e16b7.
PubMed 19195134Anagnostou T, Thompson T, Ng CF, Moussa S, Smith G, Tolley DA. Safety and outcome of percutaneous nephrolithotomy in the elderly: retrospective comparison to a younger patient group. J Endourol. 2008 Sep;22(9):2139-45. doi: 10.1089/end.2007.0432.
PubMed 18811570Ng CF, Wong A, Tolley DA. A single-center experience of the usefulness of caliceal-pelvic height in three different lithotripters. J Endourol. 2008 Jul;22(7):1409-15. doi: 10.1089/end.2006.0448.
PubMed 18690807Ng CF, Luke S, Chiu PK, Teoh JY, Wong KT, Hou SS. The effect of renal cortical thickness on the treatment outcomes of kidney stones treated with shockwave lithotripsy. Korean J Urol. 2015 May;56(5):379-85. doi: 10.4111/kju.2015.56.5.379. Epub 2015 Apr 28.
PubMed 25964839
Study at a glance
From the registry record, last updated by the sponsor on 22 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Prospective Assessment of the Perioperative Parameter and Treatment Outcomes of Urinary Calculi - International Registry
- ClinicalTrials.gov ID
- NCT05297331
- Acronym / sponsor ID
- CRE-2021.684
- Conditions
- Urolithiasis
- Keywords
- Urolithiasis, ESWL, RIRS, flexible ureteroscopy, PCNL, FANS, flexible and navigable suction ureteral access sheath, intrarenal pressure
- Study type
- Observational
- Recruitment status
- Recruiting
- Enrolment
- 3,000 participants (estimated)
- Lead sponsor
- Chinese University of Hong KongUniversity, hospital or other
- Study start
- 1 Mar 2022 (actual)
- Primary completion
- 31 Dec 2032 (estimated)
- Study completion
- 31 Mar 2033 (estimated)
- First posted
- 28 Mar 2022 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
This is an international prospective data registry to assess the treatment outcomes and complications of different treatment approaches for different surgical treatment of urolithiasis.
Detailed description
Renal stone is a common condition, and many patients suffered from recurrent diseases and required multiple interventions in their lifetime. Currently, there are many treatment options available for stone treatment, including shockwave lithotripsy, ureteroscopy, percutaneous nephrolithotomy etc.
Different treatment approaches will result in different treatment successful rate and also potential adverse effects to patients. The main challenge for stone management is the decision on the best treatment approach for individual stone of each patient. This is because for the same type of stone (such as lower caliceal stone or upper ureteric stone), different surgical treatment could be applied. The decision will depend on various patients (such as age, premorbid etc.) and stone factors (such as size, density etc) and also patients' preference.
New advances in technology have improved treatment outcomes for urolithiasis, such as single use flexible ureteroscopes, flexible and navigable ureteral access sheaths (FANS), direct in scope suction (DISS), intrarenal pressure (IRP) and intrarenal temperature (IRT) monitoring devices, new lasers and pulse modulation, etc.
Therefore, in order to have more information to guide treatment decision during discussion with patients, a prospective data registry is created to assess the treatment outcomes and complications of different treatment approaches in our hospital clusters. This information will be important for audit, treatment comparison and also patient education.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Target follow-up
- 1 Year
- Number of arms
- 5
| Arm | Type | Receives |
|---|---|---|
| FLEXOR-FANS (flexible and navigable suction ureteral access sheath) | – | –Cohort of flexible ureteroscopy with flexible and navigable suction ureteral access sheath (fURS FANS) will be studied |
| DISS (Direct in scope suction) | – | –Cohort of flexible ureteroscopy with direct in scope suction (DISS) will be studied |
| Flexible ureteroscopy - IRP / IRT | – | –Cohort of flexible ureteroscopy with and without real-time intrarenal pressure (IRP) monitoring and/or intrarenal temperature (IRT) will be studied |
| Shockwave lithotripsy (SWL) | – | –Cohort of extracorporeal shockwave lithotripsy (SWL) will be studied |
| Percutaneous nephrolithotomy (PCNL) | – | –Cohort of percutaneous nephrolithotomy with or without intrarenal pressure and temperature monitoring will be studied. |
Who may qualify
- Ages
- 18 years and older
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Patients diagnosed with urinary stones and planned for surgery (including shockwave lithotripsy, ureteroscopy, percutaneous nephrolithotomy (PCNL), laparoscopic ureterolithiasis, open stone procedures etc) in the hospitals will be identified and then enrolled to the study.
Key inclusion criteria (1 listed)
- Patient at the age of 18 or above
Key exclusion criteria (1 listed)
- Patient is unable to give consent
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Target Stone status
Time frame: postoperative, at 1 and/or 3 months
stone free rate
4 secondary outcomes
Intraoperative parameters
Time frame: intraoperative
Treatment related complication
Time frame: Thirty days after the operation
Recurrence of stone
Time frame: At 12 months
QOL and pain scores
Time frame: preoperative, postoperative on day 0 and at follow up
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 22 Oct 2026.
- Background: PubMed 39676748Gauhar V, Traxer O, Fong KY, Sietz C, Chew BH, Bin Hamri S, Gokce MI, Gadzhiev N, Yuen SKK, Malkhasyan V, Ragoori D, Tanidir Y, Somani BK, Castellani D. Comparing Thulium Fiber Versus High-Power Holmium Laser Lithotripsy Combined with the Flexible and Navigable Suction Access Sheath in Flexible Ureteroscopy for Kidney Stone Disease: A Propensity Score Matched Analysis by the Global FANS Collaborative Group. J Endourol. 2025 Jan;39(1):42-49. doi: 10.1089/end.2024.0653. Epub 2024 Dec 16.
- Background: PubMed 39896048Yuen SKK, Zhong W, Chan YS, Castellani D, Bhojani N, Agarwal MS, Tokas T, Croghan S, Jung H, Herrmann T, Somani B, Gauhar V; Global Research on Intra-renal Pressure Collaborative Group. Current utility, instruments, and future directions for intra-renal pressure management during ureteroscopy: scoping review by global research in intra-renal pressure collaborative group initiative. Ther Adv Urol. 2025 Jan 31;17:17562872251314809. doi: 10.1177/17562872251314809. eCollection 2025 Jan-Dec.
- BackgroundZhu W, Yuen SKK, Cao J, et al. Intrarenal pressure monitoring via flexible and navigable suction ureteral access sheath in retrograde intrarenal surgery: A preclinical animal study and a pilot clinical study. Clinical and Translational Discovery. 2025;5:e70031doi:10.1002/ctd2.70031
- Background: PubMed 39361036Nedbal C, Yuen SKK, Akram M, Keller EX, Martinez BB, Philip J, Emiliani E, Li JKM, Stracci D, Gauhar V, Castellani D, Somani BK. First clinical evaluation of a flexible digital ureteroscope with direct in scope suctioning system (Pusen DISS 7.5Ch): prospective multicentric feasibility study. World J Urol. 2024 Oct 3;42(1):560. doi: 10.1007/s00345-024-05275-9.
- Background: PubMed 38789313Gauhar V, Traxer O, Castellani D, Sietz C, Chew BH, Fong KY, Hamri SB, Gokce MI, Gadzhiev N, Galosi AB, Yuen SKK, El Hajj A, Ko R, Zawadzki M, Sridharan V, Lakmichi MA, Corrales M, Malkhasyan V, Ragoori D, Soebhali B, Tan K, Chai CA, Tursunkulov AN, Tanidir Y, Persaud S, Elshazly M, Kamal W, Tefik T, Shrestha A, Tiong HC, Somani BK. Could Use of a Flexible and Navigable Suction Ureteral Access Sheath Be a Potential Game-changer in Retrograde Intrarenal Surgery? Outcomes at 30 Days from a Large, Prospective, Multicenter, Real-world Study by the European Association of Urology Urolithiasis Section. Eur Urol Focus. 2024 Dec;10(6):975-982. doi: 10.1016/j.euf.2024.05.010. Epub 2024 May 24.
- Background: PubMed 38786332Yuen SKK, Traxer O, Wroclawski ML, Gadzhiev N, Chai CA, Lim EJ, Giulioni C, De Stefano V, Nedbal C, Maggi M, Sarica K, Castellani D, Somani B, Gauhar V. Scoping Review of Experimental and Clinical Evidence and Its Influence on Development of the Suction Ureteral Access Sheath. Diagnostics (Basel). 2024 May 16;14(10):1034. doi: 10.3390/diagnostics14101034.
- Background: PubMed 39774241Talyshinskii A, Tzelves L, Ventimiglia E, Yuen SKK, Gauhar V, Traxer O, Somani B. Technological innovation and revolution with single-use digital flexible ureteroscopes: a review from section of EAU Endourology. Curr Opin Urol. 2025 Jul 1;35(4):360-367. doi: 10.1097/MOU.0000000000001260. Epub 2025 Jan 7.
- Background: PubMed 39674378Gauhar V, Somani BK, Seitz C, Castellani D, Tefik T, Persaud S, Ragoori D, Gauhar V, Tan K, Lakmichi MA, Gadzhiev N, Malkhasyan V, Kamal W, Tanidir Y, Chai CA, Tursunkulov AN, Farahat Y, Keller EX, Chew BH, Herrmann T, Traxer O, Yuen SKK. A Global Survey to Assess Urologists' Attitudes Towards Suction Technology in Endourology by the European Association of Urology Section of Endourology and Progressive Endourological Association for Research and Leading Solutions. Urology. 2025 Mar;197:42-50. doi: 10.1016/j.urology.2024.12.009. Epub 2024 Dec 16.
- Background: PubMed 19060340Chan SW, Ng CF, Man CW, Chung R, Li SK. A report on a randomly sampled questionnaire survey about renal stone disease in Hong Kong. Hong Kong Med J. 2008 Dec;14(6):427-31.
- Background: PubMed 31016804Taguchi K, Cho SY, Ng AC, Usawachintachit M, Tan YK, Deng YL, Shen CH, Gyawali P, Alenezi H, Basiri A, Bou S, Djojodemedjo T, Sarica K, Shi L, Singam P, Singh SK, Yasui T. The Urological Association of Asia clinical guideline for urinary stone disease. Int J Urol. 2019 Jul;26(7):688-709. doi: 10.1111/iju.13957. Epub 2019 Apr 24.
- Background: PubMed 30575154Li JK, Teoh JY, Ng CF. Updates in endourological management of urolithiasis. Int J Urol. 2019 Feb;26(2):172-183. doi: 10.1111/iju.13885. Epub 2018 Dec 21.
- Background: PubMed 19195134Ng CF. The effect of age on outcomes in patients undergoing treatment for renal stones. Curr Opin Urol. 2009 Mar;19(2):211-4. doi: 10.1097/mou.0b013e32831e16b7.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part.
Chi Fai NG, MD principal investigator
Chinese University of Hong Kong
3 sites in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Urolithiasis, run by Chinese University of Hong Kong at 3 sites in Hong Kong.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 1 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: looking for participants now, as of the sponsor's last update on 22 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 3 sites in Hong Kong. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Chi Fai NG, MD (35052625, ngcf@surgery.cuhk.edu.hk), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Target Stone status (time frame: postoperative, at 1 and/or 3 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT05297331, which also lists 15 linked publications.
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 22 Oct 2026.