Comparing supine and prone positions for treating distal ureteric stones with shockwave therapy
Official title: Randomized Controlled Study on Extracorporeal Shockwave Lithotripsy for Distal Ureteric Stone: Transgluteal Versus Traditional Prone Approach
Run by Queen Mary Hospital, Hong Kong · NCT02298465 · Data updated 2026-11-12
This study is testing whether lying on your back or stomach during shockwave therapy can help adults with kidney stones get rid of them more effectively.
Quick facts
| Study type | Interventional |
|---|---|
| Ages | 18 Years and up |
| Sex | All |
| Enrollment | 130 (estimated) |
| Sponsor | Queen Mary Hospital, Hong Kong Academic / other |
| Locations | 1 site (Hong Kong) |
| Status | Recruiting |
| Started | November 2014 |
| Main results expected | November 2025 |
| Study ends | November 2027 |
| Registry record updated | August 9, 2023 |
| Trial ID | NCT02298465 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults over 18 years with distal ureteric stones of size 3mm or larger who are seeking ESWL treatment.
✕Probably not a fit
Patients with conditions such as active urinary tract infections, uncontrolled hypertension, or those unable to assume the required positions for ESWL may not benefit from this study.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This clinical trial investigates the effectiveness of extracorporeal shockwave lithotripsy (ESWL) for treating distal ureteric stones in two different positions: supine and prone. The study aims to determine if the supine position can improve the stone-free rate compared to the traditional prone position, especially for patients who may have difficulty lying prone due to medical conditions. Participants will be adults over 18 years with stones sized 3mm or larger, and the study will monitor for any complications or side effects associated with each position. The trial is conducted at Queen Mary Hospital in Hong Kong.
Why it matters
Potential benefit: If successful, this study could provide a more effective and safer treatment option for patients with distal ureteric stones who cannot tolerate the prone position.
How similar studies have gone: Previous studies have shown promising results with the supine approach, indicating improved outcomes compared to the prone position, suggesting this approach may be effective.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * All patients, over 18 years of age, with distal ureteric stones with stone size of ≥3mm on kidney-ureter-bladder (KUB) X-ray who opted for ESWL treatment Exclusion Criteria: * Patients who are unable to provide consent * radiolucent stones * active urinary tract infections * pregnancy * uncontrolled hypertension * uncontrolled bleeding tendencies * severe skeletal malformations * arterial aneurysms within the vicinity of the stone (such as iliac artery aneurysms) * unable to assume the appropriate position (prone or supine) for ESWL * solitary kidneys * transplanted kidneys * presence of ureteric stents
Where it's running
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Queen Mary Hospital
Hong Kong, China Recruiting
Study contacts
- Principal investigator: Brian Ho, MBBS — Queen Mary Hospital, Hong Kong
- Study coordinator: Brian Ho, MBBS
- Email: brianshho@gmail.com
- Phone: (852)2255-3023
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Acupressure to Ease Pain During ESWL for Kidney Stones
This study tests whether applying acupressure to specific points before ESWL can reduce pain and improve comfort for adults with kidney or proximal ureteral stones.
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Using Shuotongo ureteroscopy to treat upper urinary tract stones
This study tests if a new method called Shuotongo ureteroscopy can safely and effectively remove larger kidney stones better than the usual techniques.
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Ultrasound to help pass kidney stones
This test uses focused ultrasound to break and push small (2–7 mm) kidney stones to see if adults can pass them without anesthesia.
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Break Wave extracorporeal lithotripsy to break kidney stones
This trial will try the Break Wave machine to break upper urinary tract stones up to 20 mm (10 mm in the lower pole) in adults as an outpatient procedure.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.