Antiretropulsion Device

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Unique Antiretropulsion Device - Gel rather than mechanical device. After the gel is placed, the catheter is removed, freeing up space in the ureter.
Animation - shows how BackStop Gel prevents stone migration during lithotripsy.
Reverse-thermosensitive Gel - at room temperature it is a soft, injectable gel and at body temperature it increases in viscosity to form a plug.
Kits include a 3F or 5F catheter with radiopaque distal tip and a 5mL syringe of Backstop Gel.
Reusable Injector designed to inject Backstop Gel.
Effective Antiretropulsion Device - prevents stone migration during lithotripsy.1 Increases fragmentation efficiency in bench studies.2
Easy to remove - dissolved 100% of the time in clinical studies.1,3

A reverse-thermosensitive gel that forms a plug in the ureter to prevent stone migration during lithotripsy, making stone cases more predictable.

Key Resources



Product Details

Effective Antiretropulsion Device

  • Prevents stone migration during lithotripsy1
  • Completely occludes the ureter, preventing migration of stone fragments of all sizes 
  • Increases fragmentation efficiency, as demonstrated in a bench study2
  • May be used with laser, pneumatic and ultrasonic lithotripters

Unique Antiretropulsion Device

  • Gel rather than mechanical device
  • Gel conforms to the ureter
  • After the gel is placed, the catheter is removed, freeing the field

Easy to Place, Easy to Remove

  • Place with 3F catheter under direct visualization or with a 5F catheter under fluoroscopic guidance
  • Flush with conventional irrigation
  • Dissolved 100% of the time in clinical studies1,3

Latex Information

This product contains no detectable latex.


Ordering Information

Order Number UPN Description Size Quantity
390900 M0063909000 BackStop Gel x 3F Catheter Kit 5mL Syringe of Gel x 3F Catheter Each
390901 M0063909010 BackStop Gel x 5F Catheter Kit 5mL Syringe of Gel x 5F Catheter Each
390904 M0063909040 BackStop Injector (Reusable) N/A Each
390905 M0063909050 BackStop Replacement Sleeve (Reusable) N/A Each

Clinical Information

Stone Retropulsion Study


In a randomized, prospective, multi-center study, the BackStop Device group had a lower rate of retropulsion (9%) vs. the control group (53%).1

Backstop Gel reduced the occurrence of stone migration in ureteroscopy with ISWL cases.



Procedure Videos

Tools and Resources

  Product Brochure
  Technique Spotlight
  Stone Treatment Solutions Brochure
  New Product Guide


1. Rane, A et al, The use of a novel reverse thermosensitive polymer (BackStop™) to prevent ureteric stone retropulsion during intracorporeal lithotripsy: a randomized, controlled trial, J of Urol, 183: 1417-1423, 2010.

2. Kyle, C et al, Use of a Phase-Transition Polymer to decrease Retropulsion and Increase Efficiency of Lithotripsy: An In Vitro Study. World Congress of Endourology Poster, 2007.

3. Rao, P et al, Initial Experience with BackStop(TM) Preventing Retropulsion During Ureteroscopy, British Association of Urological Surgery Poster, 2008.