Clinical Evaluation of BackStop in Patients Undergoing Intraureteric Stone Lithotripsy

Not Applicable

Completed

• Conditions: Renal Calculi; Kidney Stones
• Interventions: Device: BackStop; Device: Intracorporeal lithotripsy without the use of an anti-retropulsion device

• Registration Number: NCT00893282
• Lead Sponsor: Pluromed, Inc.

Brief Summary

The purpose of this clinical study is to evaluate BackStop, a polymer-based device that is intended to be used during ureteroscopic lithotripsy to prevent retrograde stone migration. It is a water soluble polymer with reverse thermosensitive properties; the polymer exists as a liquid at low temperature (below 17 C) and rapidly transitions to a high viscosity gel at body temperature (i.e. in the ureter). BackStop is injected above the stones in the ureter and is intended to prevent retrograde migration of stones during ureteroscopic lithotripsy. Upon completion of the lithotripsy procedure, BackStop dissolves naturally or by irrigation.

The study hypothesis is that a greater proportion of patients will experience no retropulsion of a kidney stone when BackStop is used versus no anti-retropulsion device when undergoing intracorporeal lithotripsy.

Detailed Description

Not available

Study Timeline

• Study Start: 2008-02
• Primary Completion: 2008-11
• Study Completion: 2008-12
• Status Verified: 2009-05
• Study First Submitted: 2009-05-01
• Study First Submitted QC: 2009-05-04
• Last Update Submitted: 2009-05-04
• Study First Posted: 2009-05-05
• Last Update Posted: 2009-05-05

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 68

Inclusion Criteria

• Patient with a solitary, radio-opaque ureteral stone in the proximal ureter.
• Clinical indication for treatment by ureteroscopic lithotripsy.
• Minimum 18 years old (or any institutional age limits for participation in clinical study).
• Patients must be willing and able to participate in any follow-up visits, as required.
• Patients must provide informed consent.

Exclusion Criteria

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
BackStop	BackStop	Intracorporeal lithotripsy with the use of an anti-retropulsion device.
Control	Intracorporeal lithotripsy without the use of an anti-retropulsion device	No anti-retropulsion device will be used during lithotripsy.

Primary Outcome Measures

Name	Time	Method
Ability of BackStop™ to minimize migration stone fragments in the proximal ureter will and reported as "yes" or "no".	intra-operative

Secondary Outcome Measures

Name	Time	Method
Extent of residual fragments remaining in ureter at the follow-up visit 2 to 4 weeks post-procedure.	one month
In the event that stone fragments migrate retrograde, there may be a need for the physician to employ additional procedures	one month

Trial Locations

Locations (1)

McGill University Health Center; 🇨🇦 Montreal, Quebec, Canada